diff options
Diffstat (limited to 'release/src/router/busybox/init')
| -rw-r--r--[-rwxr-xr-x] | release/src/router/busybox/init/Config.in | 122 | ||||
| -rw-r--r-- | release/src/router/busybox/init/Kbuild | 10 | ||||
| -rw-r--r-- | release/src/router/busybox/init/Makefile | 30 | ||||
| -rwxr-xr-x | release/src/router/busybox/init/Makefile.in | 61 | ||||
| -rw-r--r-- | release/src/router/busybox/init/halt.c | 120 | ||||
| -rw-r--r-- | release/src/router/busybox/init/init.c | 1744 | ||||
| -rw-r--r-- | release/src/router/busybox/init/init_shared.c | 97 | ||||
| -rw-r--r-- | release/src/router/busybox/init/init_shared.h | 3 | ||||
| -rw-r--r-- | release/src/router/busybox/init/mesg.c | 50 | ||||
| -rw-r--r-- | release/src/router/busybox/init/minit.c | 612 | ||||
| -rw-r--r-- | release/src/router/busybox/init/msvc.c | 300 | ||||
| -rw-r--r-- | release/src/router/busybox/init/pidfilehack.c | 78 | ||||
| -rw-r--r-- | release/src/router/busybox/init/poweroff.c | 56 | ||||
| -rw-r--r-- | release/src/router/busybox/init/reboot.c | 56 |
14 files changed, 960 insertions, 2379 deletions
diff --git a/release/src/router/busybox/init/Config.in b/release/src/router/busybox/init/Config.in index eb421138..1a1be4a9 100755..100644 --- a/release/src/router/busybox/init/Config.in +++ b/release/src/router/busybox/init/Config.in @@ -5,93 +5,99 @@ menu "Init Utilities" -config CONFIG_INIT +config INIT bool "init" default n + select FEATURE_SYSLOG help init is the first program run when the system boots. -config CONFIG_FEATURE_USE_INITTAB - bool " Support reading an inittab file?" +config FEATURE_USE_INITTAB + bool "Support reading an inittab file" default y - depends on CONFIG_INIT + depends on INIT help Allow init to read an inittab file when the system boot. -config CONFIG_FEATURE_INITRD - bool " Support running init from within an initrd?" +config FEATURE_KILL_REMOVED + bool "Support killing processes that have been removed from inittab" default y - depends on CONFIG_INIT + depends on FEATURE_USE_INITTAB help - Allow init to be called from an initrd as linuxrc. + When respawn entries are removed from inittab and a SIGHUP is + sent to init, this feature will kill the processes that have + been removed. -config CONFIG_FEATURE_INIT_COREDUMPS - bool " Support dumping core for child processes (debugging only)?" - default n - depends on CONFIG_INIT +config FEATURE_KILL_DELAY + int "How long to wait between TERM and KILL (0 - send TERM only)" if FEATURE_KILL_REMOVED + range 0 1024 + default 0 + depends on FEATURE_KILL_REMOVED help - If this option is enabled and the file /.init_enable_core - exists, then init will call setrlimit() to allow unlimited - core file sizes. If this option is disabled, processes - will not generate any core files. + With nonzero setting, init sends TERM, forks, child waits N + seconds, sends KILL and exits. Setting it too high is unwise + (child will hang around for too long and could actually kill + the wrong process!) -config CONFIG_FEATURE_EXTRA_QUIET - bool " Should init be _extra_ quiet on boot?" - default y - depends on CONFIG_INIT - help - Prevent init from logging some messages to the console - during boot. - -config CONFIG_HALT - bool "halt" - default y +config FEATURE_INIT_SCTTY + bool "Run commands with leading dash with controlling tty" + default n + depends on INIT help - Stop all processes and halt the system. + If this option is enabled, init will try to give a controlling + tty to any command which has leading hyphen (often it's "-/bin/sh"). + More precisely, init will do "ioctl(STDIN_FILENO, TIOCSCTTY, 0)". + If device attached to STDIN_FILENO can be a ctty but is not yet + a ctty for other session, it will become this process' ctty. + This is not the traditional init behavour, but is often what you want + in an embedded system where the console is only accessed during + development or for maintenance. + NB: using cttyhack applet may work better. -config CONFIG_POWEROFF - bool "poweroff" - default y - help - Stop all processes and (try to) power off the system. +config FEATURE_INIT_SYSLOG + bool "Enable init to write to syslog" + default n + depends on INIT -config CONFIG_REBOOT - bool "reboot" +config FEATURE_EXTRA_QUIET + bool "Be _extra_ quiet on boot" default y + depends on INIT help - Stop all processes and reboot the system. + Prevent init from logging some messages to the console during boot. -config CONFIG_MINIT - bool "minit" +config FEATURE_INIT_COREDUMPS + bool "Support dumping core for child processes (debugging only)" default n - depends on ! CONFIG_INIT + depends on INIT help - Minimal init, based on minit v0.9.1. This is a simple - init replacement that handles starting/stopping services, - and service dependencies. See http://www.fefe.de/minit/ - for additional information. + If this option is enabled and the file /.init_enable_core + exists, then init will call setrlimit() to allow unlimited + core file sizes. If this option is disabled, processes + will not generate any core files. -config CONFIG_PIDFILEHACK - bool "pidfilehack" +config FEATURE_INITRD + bool "Support running init from within an initrd (not initramfs)" default y - depends on CONFIG_MINIT + depends on INIT help - pidfilehack is used by minit to run servers. + Legacy support for running init under the old-style initrd. Allows + the name linuxrc to act as init, and it doesn't assume init is PID 1. -config CONFIG_MSVC - bool "msvc" - default y - depends on CONFIG_MINIT + This does not apply to initramfs, which runs /init as PID 1 and + requires no special support. + +config HALT + bool "poweroff, halt, and reboot" + default n help - msvc is used to start and stop processes controlled by minit + Stop all processes and either halt, reboot, or power off the system. -config CONFIG_MESG +config MESG bool "mesg" - default y + default n help - Mesg controls the access to your terminal by others. It - is typically used to allow or disallow other users to write - to your terminal + Mesg controls access to your terminal by others. It is typically + used to allow or disallow other users to write to your terminal endmenu - diff --git a/release/src/router/busybox/init/Kbuild b/release/src/router/busybox/init/Kbuild new file mode 100644 index 00000000..c060f3af --- /dev/null +++ b/release/src/router/busybox/init/Kbuild @@ -0,0 +1,10 @@ +# Makefile for busybox +# +# Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org> +# +# Licensed under the GPL v2, see the file LICENSE in this tarball. + +lib-y:= +lib-$(CONFIG_HALT) += halt.o +lib-$(CONFIG_INIT) += init.o +lib-$(CONFIG_MESG) += mesg.o diff --git a/release/src/router/busybox/init/Makefile b/release/src/router/busybox/init/Makefile deleted file mode 100644 index 816230bf..00000000 --- a/release/src/router/busybox/init/Makefile +++ /dev/null @@ -1,30 +0,0 @@ -# Makefile for busybox -# -# Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org> -# -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -# General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -# - -TOPDIR:= ../ -INIT_DIR:=./ -include $(TOPDIR).config -include $(TOPDIR)Rules.mak -include Makefile.in -all: $(libraries-y) --include $(TOPDIR).depend - -clean: - rm -f *.o *.a $(AR_TARGET) - diff --git a/release/src/router/busybox/init/Makefile.in b/release/src/router/busybox/init/Makefile.in deleted file mode 100755 index 1b13f693..00000000 --- a/release/src/router/busybox/init/Makefile.in +++ /dev/null @@ -1,61 +0,0 @@ -# Makefile for busybox -# -# Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org> -# -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -# General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -# - -INIT_AR:=init.a -ifndef $(INIT_DIR) -INIT_DIR:=$(TOPDIR)init/ -endif - -INIT-y:= -INIT-$(CONFIG_HALT) += halt.o -INIT-$(CONFIG_INIT) += init.o -INIT-$(CONFIG_MESG) += mesg.o -INIT-$(CONFIG_MINIT) += minit.o -INIT-$(CONFIG_MSVC) += msvc.o -INIT-$(CONFIG_PIDFILEHACK) += pidfilehack.o -INIT-$(CONFIG_POWEROFF) += poweroff.o -INIT-$(CONFIG_REBOOT) += reboot.o - -ifeq ($(CONFIG_HALT), y) -CONFIG_INIT_SHARED=y -else -ifeq ($(CONFIG_INIT), y) -CONFIG_INIT_SHARED=y -else -ifeq ($(CONFIG_POWEROFF), y) -CONFIG_INIT_SHARED=y -else -ifeq ($(CONFIG_REBOOT), y) -CONFIG_INIT_SHARED=y -else -CONFIG_INIT_SHARED=n -endif -endif -endif -endif - -ifeq ($(CONFIG_INIT_SHARED), y) -INIT-$(CONFIG_INIT_SHARED) += init_shared.o -endif - -libraries-y+=$(INIT_DIR)$(INIT_AR) - -$(INIT_DIR)$(INIT_AR): $(patsubst %,$(INIT_DIR)%, $(INIT-y)) - $(AR) -ro $@ $(patsubst %,$(INIT_DIR)%, $(INIT-y)) - diff --git a/release/src/router/busybox/init/halt.c b/release/src/router/busybox/init/halt.c index decdaeaf..3a23ecab 100644 --- a/release/src/router/busybox/init/halt.c +++ b/release/src/router/busybox/init/halt.c @@ -1,48 +1,104 @@ /* vi: set sw=4 ts=4: */ /* - * Mini halt implementation for busybox + * Poweroff reboot and halt, oh my. * - * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * Copyright 2006 by Rob Landley <rob@landley.net> * + * Licensed under GPL version 2, see file LICENSE in this tarball for details. */ -#include <signal.h> -#include <stdlib.h> -#include <unistd.h> -#include <getopt.h> +#include "libbb.h" #include <sys/reboot.h> -#include "busybox.h" -#include "init_shared.h" +#if ENABLE_FEATURE_WTMP +#include <sys/utsname.h> +#include <utmp.h> -extern int halt_main(int argc, char **argv) +static void write_wtmp(void) { - char *delay; /* delay in seconds before rebooting */ - - if(bb_getopt_ulflags(argc, argv, "d:", &delay)) { - sleep(atoi(delay)); + struct utmp utmp; + struct utsname uts; + if (access(bb_path_wtmp_file, R_OK|W_OK) == -1) { + close(creat(bb_path_wtmp_file, 0664)); } + memset(&utmp, 0, sizeof(utmp)); + utmp.ut_tv.tv_sec = time(NULL); + safe_strncpy(utmp.ut_user, "shutdown", UT_NAMESIZE); + utmp.ut_type = RUN_LVL; + safe_strncpy(utmp.ut_id, "~~", sizeof(utmp.ut_id)); + safe_strncpy(utmp.ut_line, "~~", UT_LINESIZE); + if (uname(&uts) == 0) + safe_strncpy(utmp.ut_host, uts.release, sizeof(utmp.ut_host)); + updwtmp(bb_path_wtmp_file, &utmp); + +} +#else +#define write_wtmp() ((void)0) +#endif -#ifndef CONFIG_INIT #ifndef RB_HALT_SYSTEM -#define RB_HALT_SYSTEM 0xcdef0123 +#define RB_HALT_SYSTEM RB_HALT #endif - return(bb_shutdown_system(RB_HALT_SYSTEM)); -#else - return kill_init(SIGUSR1); + +#ifndef RB_POWER_OFF +#define RB_POWER_OFF RB_POWERDOWN #endif + +int halt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int halt_main(int argc UNUSED_PARAM, char **argv) +{ + static const int magic[] = { + RB_HALT_SYSTEM, + RB_POWER_OFF, + RB_AUTOBOOT + }; + static const smallint signals[] = { SIGUSR1, SIGUSR2, SIGTERM }; + + int delay = 0; + int which, flags, rc; + + /* Figure out which applet we're running */ + for (which = 0; "hpr"[which] != applet_name[0]; which++) + continue; + + /* Parse and handle arguments */ + opt_complementary = "d+"; /* -d N */ + /* We support -w even if !ENABLE_FEATURE_WTMP, + * in order to not break scripts. + * -i (shut down network interfaces) is ignored. + */ + flags = getopt32(argv, "d:nfwi", &delay); + + sleep(delay); + + write_wtmp(); + + if (flags & 8) /* -w */ + return EXIT_SUCCESS; + + if (!(flags & 2)) /* no -n */ + sync(); + + /* Perform action. */ + rc = 1; + if (!(flags & 4)) { /* no -f */ +//TODO: I tend to think that signalling linuxrc is wrong +// pity original author didn't comment on it... + if (ENABLE_FEATURE_INITRD) { + pid_t *pidlist = find_pid_by_name("linuxrc"); + if (pidlist[0] > 0) + rc = kill(pidlist[0], signals[which]); + if (ENABLE_FEATURE_CLEAN_UP) + free(pidlist); + } + if (rc) { + rc = kill(1, signals[which]); + } + } else { + rc = reboot(magic[which]); + } + + if (rc) + bb_perror_nomsg_and_die(); + return rc; } diff --git a/release/src/router/busybox/init/init.c b/release/src/router/busybox/init/init.c index 1ecc43e1..ce264283 100644 --- a/release/src/router/busybox/init/init.c +++ b/release/src/router/busybox/init/init.c @@ -3,279 +3,210 @@ * Mini init implementation for busybox * * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>. - * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org> + * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> * Adjusted by so many folks, it's impossible to keep track. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ -/* Turn this on to disable all the dangerous - rebooting stuff when debugging. -#define DEBUG_INIT -*/ - -#include <stdio.h> -#include <stdlib.h> -#include <errno.h> +#include "libbb.h" +#include <syslog.h> #include <paths.h> -#include <signal.h> -#include <stdarg.h> -#include <string.h> -#include <termios.h> -#include <unistd.h> -#include <limits.h> -#include <sys/fcntl.h> -#include <sys/ioctl.h> -#include <sys/mount.h> -#include <sys/types.h> -#include <sys/wait.h> #include <sys/reboot.h> -#include "busybox.h" - -#include "init_shared.h" - - -#ifdef CONFIG_SYSLOGD -# include <sys/syslog.h> -#endif +#include <sys/resource.h> +#include <linux/vt.h> -#if defined(__UCLIBC__) && !defined(__UCLIBC_HAS_MMU__) -#define fork vfork -#endif +/* Was a CONFIG_xxx option. A lot of people were building + * not fully functional init by switching it on! */ +#define DEBUG_INIT 0 -#define INIT_BUFFS_SIZE 256 +#define COMMAND_SIZE 256 +#define CONSOLE_NAME_SIZE 32 -/* From <linux/vt.h> */ -struct vt_stat { - unsigned short v_active; /* active vt */ - unsigned short v_signal; /* signal to send */ - unsigned short v_state; /* vt bitmask */ -}; -static const int VT_GETSTATE = 0x5603; /* get global vt state info */ - -/* From <linux/serial.h> */ -struct serial_struct { - int type; - int line; - int port; - int irq; - int flags; - int xmit_fifo_size; - int custom_divisor; - int baud_base; - unsigned short close_delay; - char reserved_char[2]; - int hub6; - unsigned short closing_wait; /* time to wait before closing */ - unsigned short closing_wait2; /* no longer used... */ - int reserved[4]; -}; - - -#ifndef _PATH_STDPATH -#define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin" +/* Default sysinit script. */ +#ifndef INIT_SCRIPT +#define INIT_SCRIPT "/etc/init.d/rcS" #endif -#if defined CONFIG_FEATURE_INIT_COREDUMPS +/* Each type of actions can appear many times. They will be + * handled in order. RESTART is an exception, only 1st is used. + */ +/* Start these actions first and wait for completion */ +#define SYSINIT 0x01 +/* Start these after SYSINIT and wait for completion */ +#define WAIT 0x02 +/* Start these after WAIT and *dont* wait for completion */ +#define ONCE 0x04 /* - * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called - * before processes are spawned to set core file size as unlimited. - * This is for debugging only. Don't use this is production, unless - * you want core dumps lying about.... + * NB: while SYSINIT/WAIT/ONCE are being processed, + * SIGHUP ("reread /etc/inittab") will be ignored. + * Rationale: it would be ambiguous whether SYSINIT/WAIT/ONCE + * need to be rerun or not. */ -#define CORE_ENABLE_FLAG_FILE "/.init_enable_core" -#include <sys/resource.h> -#include <sys/time.h> -#endif - -#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) - -#define SHELL "/bin/sh" /* Default shell */ -#define LOGIN_SHELL "-" SHELL /* Default login shell */ -#define INITTAB "/etc/inittab" /* inittab file location */ -#ifndef INIT_SCRIPT -#define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */ -#endif - -#define MAXENV 16 /* Number of env. vars */ - -#define CONSOLE_BUFF_SIZE 32 - -/* Allowed init action types */ -#define SYSINIT 0x001 -#define RESPAWN 0x002 -#define ASKFIRST 0x004 -#define WAIT 0x008 -#define ONCE 0x010 -#define CTRLALTDEL 0x020 -#define SHUTDOWN 0x040 -#define RESTART 0x080 - -/* A mapping between "inittab" action name strings and action type codes. */ -struct init_action_type { - const char *name; - int action; -}; +/* Start these after ONCE are started, restart on exit */ +#define RESPAWN 0x08 +/* Like RESPAWN, but wait for <Enter> to be pressed on tty */ +#define ASKFIRST 0x10 +/* + * Start these on SIGINT, and wait for completion. + * Then go back to respawning RESPAWN and ASKFIRST actions. + * NB: kernel sends SIGINT to us if Ctrl-Alt-Del was pressed. + */ +#define CTRLALTDEL 0x20 +/* + * Start these before killing all processes in preparation for + * running RESTART actions or doing low-level halt/reboot/poweroff + * (initiated by SIGUSR1/SIGTERM/SIGUSR2). + * Wait for completion before proceeding. + */ +#define SHUTDOWN 0x40 +/* + * exec() on SIGQUIT. SHUTDOWN actions are started and waited for, + * then all processes are killed, then init exec's 1st RESTART action, + * replacing itself by it. If no RESTART action specified, + * SIGQUIT has no effect. + */ +#define RESTART 0x80 -static const struct init_action_type actions[] = { - {"sysinit", SYSINIT}, - {"respawn", RESPAWN}, - {"askfirst", ASKFIRST}, - {"wait", WAIT}, - {"once", ONCE}, - {"ctrlaltdel", CTRLALTDEL}, - {"shutdown", SHUTDOWN}, - {"restart", RESTART}, - {0, 0} -}; -/* Set up a linked list of init_actions, to be read from inittab */ +/* A linked list of init_actions, to be read from inittab */ struct init_action { - pid_t pid; - char command[INIT_BUFFS_SIZE]; - char terminal[CONSOLE_BUFF_SIZE]; struct init_action *next; - int action; + pid_t pid; + uint8_t action_type; + char terminal[CONSOLE_NAME_SIZE]; + char command[COMMAND_SIZE]; }; -/* Static variables */ static struct init_action *init_action_list = NULL; -static char console[CONSOLE_BUFF_SIZE] = _PATH_CONSOLE; -#ifndef CONFIG_SYSLOGD -static char *log = VC_5; -#endif -static sig_atomic_t got_cont = 0; -static const int LOG = 0x1; -static const int CONSOLE = 0x2; +static const char *log_console = VC_5; -#if defined CONFIG_FEATURE_EXTRA_QUIET -static const int MAYBE_CONSOLE = 0x0; -#else -#define MAYBE_CONSOLE CONSOLE -#endif +enum { + L_LOG = 0x1, + L_CONSOLE = 0x2, + MAYBE_CONSOLE = L_CONSOLE * !ENABLE_FEATURE_EXTRA_QUIET, #ifndef RB_HALT_SYSTEM -static const int RB_HALT_SYSTEM = 0xcdef0123; -static const int RB_ENABLE_CAD = 0x89abcdef; -static const int RB_DISABLE_CAD = 0; - -#define RB_POWER_OFF 0x4321fedc -static const int RB_AUTOBOOT = 0x01234567; + RB_HALT_SYSTEM = 0xcdef0123, /* FIXME: this overflows enum */ + RB_ENABLE_CAD = 0x89abcdef, + RB_DISABLE_CAD = 0, + RB_POWER_OFF = 0x4321fedc, + RB_AUTOBOOT = 0x01234567, #endif - -static const char * const environment[] = { - "HOME=/", - "PATH=" _PATH_STDPATH, - "SHELL=" SHELL, - "USER=root", - NULL }; -/* Function prototypes */ -static void delete_init_action(struct init_action *a); -static int waitfor(const struct init_action *a); -static void halt_signal(int sig); - - -static void loop_forever(void) -{ - while (1) - sleep(1); -} - /* Print a message to the specified device. - * Device may be bitwise-or'd from LOG | CONSOLE */ -#ifndef DEBUG_INIT -static inline void messageD(int device, const char *fmt, ...) -{ -} -#else -#define messageD message -#endif -static void message(int device, const char *fmt, ...) + * "where" may be bitwise-or'd from L_LOG | L_CONSOLE + * NB: careful, we can be called after vfork! + */ +#define dbg_message(...) do { if (DEBUG_INIT) message(__VA_ARGS__); } while (0) +static void message(int where, const char *fmt, ...) __attribute__ ((format(printf, 2, 3))); -static void message(int device, const char *fmt, ...) +static void message(int where, const char *fmt, ...) { va_list arguments; - int l; - char msg[1024]; -#ifndef CONFIG_SYSLOGD - static int log_fd = -1; -#endif + unsigned l; + char msg[128]; msg[0] = '\r'; - va_start(arguments, fmt); - l = vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments) + 1; - va_end(arguments); - -#ifdef CONFIG_SYSLOGD - /* Log the message to syslogd */ - if (device & LOG) { - /* don`t out "\r\n" */ - syslog_msg(LOG_DAEMON, LOG_INFO, msg + 1); + va_start(arguments, fmt); + l = 1 + vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments); + if (l > sizeof(msg) - 1) + l = sizeof(msg) - 1; + va_end(arguments); + +#if ENABLE_FEATURE_INIT_SYSLOG + msg[l] = '\0'; + if (where & L_LOG) { + /* Log the message to syslogd */ + openlog("init", 0, LOG_DAEMON); + /* don't print "\r" */ + syslog(LOG_INFO, "%s", msg + 1); + closelog(); } - msg[l++] = '\n'; - msg[l] = 0; + msg[l] = '\0'; #else - - msg[l++] = '\n'; - msg[l] = 0; - /* Take full control of the log tty, and never close it. - * It's mine, all mine! Muhahahaha! */ - if (log_fd < 0) { - if ((log_fd = device_open(log, O_RDWR | O_NDELAY | O_NOCTTY)) < 0) { - log_fd = -2; - bb_error_msg("Bummer, can't write to log on %s!", log); - device = CONSOLE; - } else { - fcntl(log_fd, F_SETFD, FD_CLOEXEC); + { + static int log_fd = -1; + + msg[l++] = '\n'; + msg[l] = '\0'; + /* Take full control of the log tty, and never close it. + * It's mine, all mine! Muhahahaha! */ + if (log_fd < 0) { + if (!log_console) { + log_fd = STDERR_FILENO; + } else { + log_fd = device_open(log_console, O_WRONLY | O_NONBLOCK | O_NOCTTY); + if (log_fd < 0) { + bb_error_msg("can't log to %s", log_console); + where = L_CONSOLE; + } else { + close_on_exec_on(log_fd); + } + } + } + if (where & L_LOG) { + full_write(log_fd, msg, l); + if (log_fd == STDERR_FILENO) + return; /* don't print dup messages */ } - } - if ((device & LOG) && (log_fd >= 0)) { - bb_full_write(log_fd, msg, l); } #endif - if (device & CONSOLE) { - int fd = device_open(_PATH_CONSOLE, - O_WRONLY | O_NOCTTY | O_NDELAY); - /* Always send console messages to /dev/console so people will see them. */ + if (where & L_CONSOLE) { + /* Send console messages to console so people will see them. */ + full_write(STDERR_FILENO, msg, l); + } +} + +static void console_init(void) +{ + int vtno; + char *s; + + s = getenv("CONSOLE"); + if (!s) + s = getenv("console"); + if (s) { + int fd = open(s, O_RDWR | O_NONBLOCK | O_NOCTTY); if (fd >= 0) { - bb_full_write(fd, msg, l); - close(fd); -#ifdef DEBUG_INIT - /* all descriptors may be closed */ - } else { - bb_error_msg("Bummer, can't print: "); - va_start(arguments, fmt); - vfprintf(stderr, fmt, arguments); - va_end(arguments); -#endif + dup2(fd, STDIN_FILENO); + dup2(fd, STDOUT_FILENO); + xmove_fd(fd, STDERR_FILENO); } + dbg_message(L_LOG, "console='%s'", s); + } else { + /* Make sure fd 0,1,2 are not closed + * (so that they won't be used by future opens) */ + bb_sanitize_stdio(); +// Users report problems +// /* Make sure init can't be blocked by writing to stderr */ +// fcntl(STDERR_FILENO, F_SETFL, fcntl(STDERR_FILENO, F_GETFL) | O_NONBLOCK); } + + s = getenv("TERM"); + if (ioctl(STDIN_FILENO, VT_OPENQRY, &vtno) != 0) { + /* Not a linux terminal, probably serial console. + * Force the TERM setting to vt102 + * if TERM is set to linux (the default) */ + if (!s || strcmp(s, "linux") == 0) + putenv((char*)"TERM=vt102"); + if (!ENABLE_FEATURE_INIT_SYSLOG) + log_console = NULL; + } else if (!s) + putenv((char*)"TERM=linux"); } -/* Set terminal settings to reasonable defaults */ -static void set_term(int fd) +/* Set terminal settings to reasonable defaults. + * NB: careful, we can be called after vfork! */ +static void set_sane_term(void) { struct termios tty; - tcgetattr(fd, &tty); + tcgetattr(STDIN_FILENO, &tty); /* set control chars */ tty.c_cc[VINTR] = 3; /* C-c */ @@ -287,14 +218,13 @@ static void set_term(int fd) tty.c_cc[VSTOP] = 19; /* C-s */ tty.c_cc[VSUSP] = 26; /* C-z */ - /* use line dicipline 0 */ + /* use line discipline 0 */ tty.c_line = 0; /* Make it be sane */ tty.c_cflag &= CBAUD | CBAUDEX | CSIZE | CSTOPB | PARENB | PARODD; tty.c_cflag |= CREAD | HUPCL | CLOCAL; - /* input modes */ tty.c_iflag = ICRNL | IXON | IXOFF; @@ -305,886 +235,770 @@ static void set_term(int fd) tty.c_lflag = ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN; - tcsetattr(fd, TCSANOW, &tty); + tcsetattr_stdin_TCSANOW(&tty); } -/* How much memory does this machine have? - Units are kBytes to avoid overflow on 4GB machines */ -static int check_free_memory(void) +/* Open the new terminal device. + * NB: careful, we can be called after vfork! */ +static int open_stdio_to_tty(const char* tty_name) { - struct sysinfo info; - unsigned int result, u, s = 10; - - if (sysinfo(&info) != 0) { - bb_perror_msg("Error checking free memory"); - return -1; - } - - /* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes. - * Kernels 2.4.0 return info.mem_unit in bytes. */ - u = info.mem_unit; - if (u == 0) - u = 1; - while ((u & 1) == 0 && s > 0) { - u >>= 1; - s--; + /* empty tty_name means "use init's tty", else... */ + if (tty_name[0]) { + int fd; + + close(STDIN_FILENO); + /* fd can be only < 0 or 0: */ + fd = device_open(tty_name, O_RDWR); + if (fd) { + message(L_LOG | L_CONSOLE, "can't open %s: %s", + tty_name, strerror(errno)); + return 0; /* failure */ + } + dup2(STDIN_FILENO, STDOUT_FILENO); + dup2(STDIN_FILENO, STDERR_FILENO); } - result = (info.totalram >> s) + (info.totalswap >> s); - result = result * u; - if (result < 0) - result = INT_MAX; - return result; + set_sane_term(); + return 1; /* success */ } -static void console_init(void) +/* Wrapper around exec: + * Takes string (max COMMAND_SIZE chars). + * If chars like '>' detected, execs '[-]/bin/sh -c "exec ......."'. + * Otherwise splits words on whitespace, deals with leading dash, + * and uses plain exec(). + * NB: careful, we can be called after vfork! + */ +static void init_exec(const char *command) { - int fd; - int tried = 0; - struct vt_stat vt; - struct serial_struct sr; - char *s; - - if ((s = getenv("CONSOLE")) != NULL || (s = getenv("console")) != NULL) { - safe_strncpy(console, s, sizeof(console)); -#if #cpu(sparc) - /* sparc kernel supports console=tty[ab] parameter which is also - * passed to init, so catch it here */ - /* remap tty[ab] to /dev/ttyS[01] */ - if (strcmp(s, "ttya") == 0) - safe_strncpy(console, SC_0, sizeof(console)); - else if (strcmp(s, "ttyb") == 0) - safe_strncpy(console, SC_1, sizeof(console)); -#endif + char *cmd[COMMAND_SIZE / 2]; + char buf[COMMAND_SIZE + 6]; /* COMMAND_SIZE+strlen("exec ")+1 */ + int dash = (command[0] == '-' /* maybe? && command[1] == '/' */); + + /* See if any special /bin/sh requiring characters are present */ + if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { + strcpy(buf, "exec "); + strcpy(buf + 5, command + dash); /* excluding "-" */ + /* NB: LIBBB_DEFAULT_LOGIN_SHELL define has leading dash */ + cmd[0] = (char*)(LIBBB_DEFAULT_LOGIN_SHELL + !dash); + cmd[1] = (char*)"-c"; + cmd[2] = buf; + cmd[3] = NULL; } else { - /* 2.2 kernels: identify the real console backend and try to use it */ - if (ioctl(0, TIOCGSERIAL, &sr) == 0) { - /* this is a serial console */ - snprintf(console, sizeof(console) - 1, SC_FORMAT, sr.line); - } else if (ioctl(0, VT_GETSTATE, &vt) == 0) { - /* this is linux virtual tty */ - snprintf(console, sizeof(console) - 1, VC_FORMAT, vt.v_active); - } else { - safe_strncpy(console, _PATH_CONSOLE, sizeof(console)); - tried++; + /* Convert command (char*) into cmd (char**, one word per string) */ + char *word, *next; + int i = 0; + next = strcpy(buf, command); /* including "-" */ + while ((word = strsep(&next, " \t")) != NULL) { + if (*word != '\0') { /* not two spaces/tabs together? */ + cmd[i] = word; + i++; + } } + cmd[i] = NULL; } - - while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0 && tried < 2) { - /* Can't open selected console -- try - logical system console and VT_MASTER */ - safe_strncpy(console, (tried == 0 ? _PATH_CONSOLE : CURRENT_VC), - sizeof(console)); - tried++; - } - if (fd < 0) { - /* Perhaps we should panic here? */ -#ifndef CONFIG_SYSLOGD - log = -#endif - safe_strncpy(console, "/dev/null", sizeof(console)); - } else { - s = getenv("TERM"); - /* check for serial console */ - if (ioctl(fd, TIOCGSERIAL, &sr) == 0) { - /* Force the TERM setting to vt102 for serial console -- - * if TERM is set to linux (the default) */ - if (s == NULL || strcmp(s, "linux") == 0) - putenv("TERM=vt102"); -#ifndef CONFIG_SYSLOGD - log = console; -#endif - } else { - if (s == NULL) - putenv("TERM=linux"); - } - close(fd); + /* If we saw leading "-", it is interactive shell. + * Try harder to give it a controlling tty. + * And skip "-" in actual exec call. */ + if (dash) { + /* _Attempt_ to make stdin a controlling tty. */ + if (ENABLE_FEATURE_INIT_SCTTY) + ioctl(STDIN_FILENO, TIOCSCTTY, 0 /*only try, don't steal*/); } - messageD(LOG, "console=%s", console); + BB_EXECVP(cmd[0] + dash, cmd); + message(L_LOG | L_CONSOLE, "cannot run '%s': %s", cmd[0], strerror(errno)); + /* returns if execvp fails */ } -static void fixup_argv(int argc, char **argv, char *new_argv0) +/* Used only by run_actions */ +static pid_t run(const struct init_action *a) { - int len; - - /* Fix up argv[0] to be certain we claim to be init */ - len = strlen(argv[0]); - memset(argv[0], 0, len); - safe_strncpy(argv[0], new_argv0, len + 1); + pid_t pid; - /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */ - len = 1; - while (argc > len) { - memset(argv[len], 0, strlen(argv[len])); - len++; + /* Careful: don't be affected by a signal in vforked child */ + sigprocmask_allsigs(SIG_BLOCK); + if (BB_MMU && (a->action_type & ASKFIRST)) + pid = fork(); + else + pid = vfork(); + if (pid < 0) + message(L_LOG | L_CONSOLE, "can't fork"); + if (pid) { + sigprocmask_allsigs(SIG_UNBLOCK); + return pid; /* Parent or error */ } -} -static pid_t run(const struct init_action *a) -{ - struct stat sb; - int i, junk; - pid_t pid, pgrp, tmp_pid; - char *s, *tmpCmd, *cmd[INIT_BUFFS_SIZE], *cmdpath; - char buf[INIT_BUFFS_SIZE + 6]; /* INIT_BUFFS_SIZE+strlen("exec ")+1 */ - sigset_t nmask, omask; - static const char press_enter[] = + /* Child */ + + /* Reset signal handlers that were set by the parent process */ + bb_signals(0 + + (1 << SIGUSR1) + + (1 << SIGUSR2) + + (1 << SIGTERM) + + (1 << SIGQUIT) + + (1 << SIGINT) + + (1 << SIGHUP) + + (1 << SIGTSTP) + , SIG_DFL); + sigprocmask_allsigs(SIG_UNBLOCK); + + /* Create a new session and make ourself the process group leader */ + setsid(); + + /* Open the new terminal device */ + if (!open_stdio_to_tty(a->terminal)) + _exit(EXIT_FAILURE); + + /* NB: on NOMMU we can't wait for input in child, so + * "askfirst" will work the same as "respawn". */ + if (BB_MMU && (a->action_type & ASKFIRST)) { + static const char press_enter[] ALIGN1 = #ifdef CUSTOMIZED_BANNER #include CUSTOMIZED_BANNER #endif - "\nPlease press Enter to activate this console. "; - - /* Block sigchild while forking. */ - sigemptyset(&nmask); - sigaddset(&nmask, SIGCHLD); - sigprocmask(SIG_BLOCK, &nmask, &omask); - - if ((pid = fork()) == 0) { - /* Clean up */ - close(0); - close(1); - close(2); - sigprocmask(SIG_SETMASK, &omask, NULL); - - /* Reset signal handlers that were set by the parent process */ - signal(SIGUSR1, SIG_DFL); - signal(SIGUSR2, SIG_DFL); - signal(SIGINT, SIG_DFL); - signal(SIGTERM, SIG_DFL); - signal(SIGHUP, SIG_DFL); - signal(SIGCONT, SIG_DFL); - signal(SIGSTOP, SIG_DFL); - signal(SIGTSTP, SIG_DFL); - - /* Create a new session and make ourself the process - * group leader */ - setsid(); - - /* Open the new terminal device */ - if ((device_open(a->terminal, O_RDWR)) < 0) { - if (stat(a->terminal, &sb) != 0) { - message(LOG | CONSOLE, "device '%s' does not exist.", - a->terminal); - _exit(1); - } - message(LOG | CONSOLE, "Bummer, can't open %s", a->terminal); - _exit(1); - } - - /* Make sure the terminal will act fairly normal for us */ - set_term(0); - /* Setup stdout, stderr for the new process so - * they point to the supplied terminal */ - dup(0); - dup(0); - - /* If the init Action requires us to wait, then force the - * supplied terminal to be the controlling tty. */ - if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) { - - /* Now fork off another process to just hang around */ - if ((pid = fork()) < 0) { - message(LOG | CONSOLE, "Can't fork!"); - _exit(1); - } - - if (pid > 0) { - - /* We are the parent -- wait till the child is done */ - signal(SIGINT, SIG_IGN); - signal(SIGTSTP, SIG_IGN); - signal(SIGQUIT, SIG_IGN); - signal(SIGCHLD, SIG_DFL); + "\nPlease press Enter to activate this console. "; + char c; + /* + * Save memory by not exec-ing anything large (like a shell) + * before the user wants it. This is critical if swap is not + * enabled and the system has low memory. Generally this will + * be run on the second virtual console, and the first will + * be allowed to start a shell or whatever an init script + * specifies. + */ + dbg_message(L_LOG, "waiting for enter to start '%s'" + "(pid %d, tty '%s')\n", + a->command, getpid(), a->terminal); + full_write(STDOUT_FILENO, press_enter, sizeof(press_enter) - 1); + while (safe_read(STDIN_FILENO, &c, 1) == 1 && c != '\n') + continue; + } - /* Wait for child to exit */ - while ((tmp_pid = waitpid(pid, &junk, 0)) != pid); + /* + * When a file named /.init_enable_core exists, setrlimit is called + * before processes are spawned to set core file size as unlimited. + * This is for debugging only. Don't use this is production, unless + * you want core dumps lying about.... + */ + if (ENABLE_FEATURE_INIT_COREDUMPS) { + if (access("/.init_enable_core", F_OK) == 0) { + struct rlimit limit; + limit.rlim_cur = RLIM_INFINITY; + limit.rlim_max = RLIM_INFINITY; + setrlimit(RLIMIT_CORE, &limit); + } + } - /* See if stealing the controlling tty back is necessary */ - pgrp = tcgetpgrp(0); - if (pgrp != getpid()) - _exit(0); + /* Log the process name and args */ + message(L_LOG, "starting pid %d, tty '%s': '%s'", + getpid(), a->terminal, a->command); - /* Use a temporary process to steal the controlling tty. */ - if ((pid = fork()) < 0) { - message(LOG | CONSOLE, "Can't fork!"); - _exit(1); - } - if (pid == 0) { - setsid(); - ioctl(0, TIOCSCTTY, 1); - _exit(0); - } - while ((tmp_pid = waitpid(pid, &junk, 0)) != pid) { - if (tmp_pid < 0 && errno == ECHILD) - break; - } - _exit(0); - } + /* Now run it. The new program will take over this PID, + * so nothing further in init.c should be run. */ + init_exec(a->command); + /* We're still here? Some error happened. */ + _exit(-1); +} - /* Now fall though to actually execute things */ - } +static struct init_action *mark_terminated(pid_t pid) +{ + struct init_action *a; - /* See if any special /bin/sh requiring characters are present */ - if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { - cmd[0] = SHELL; - cmd[1] = "-c"; - cmd[2] = strcat(strcpy(buf, "exec "), a->command); - cmd[3] = NULL; - } else { - /* Convert command (char*) into cmd (char**, one word per string) */ - strcpy(buf, a->command); - s = buf; - for (tmpCmd = buf, i = 0; (tmpCmd = strsep(&s, " \t")) != NULL;) { - if (*tmpCmd != '\0') { - cmd[i] = tmpCmd; - i++; - } + if (pid > 0) { + for (a = init_action_list; a; a = a->next) { + if (a->pid == pid) { + a->pid = 0; + return a; } - cmd[i] = NULL; } + } + return NULL; +} - cmdpath = cmd[0]; - - /* - Interactive shells want to see a dash in argv[0]. This - typically is handled by login, argv will be setup this - way if a dash appears at the front of the command path - (like "-/bin/sh"). - */ +static void waitfor(pid_t pid) +{ + /* waitfor(run(x)): protect against failed fork inside run() */ + if (pid <= 0) + return; - if (*cmdpath == '-') { + /* Wait for any child (prevent zombies from exiting orphaned processes) + * but exit the loop only when specified one has exited. */ + while (1) { + pid_t wpid = wait(NULL); + mark_terminated(wpid); + /* Unsafe. SIGTSTP handler might have wait'ed it already */ + /*if (wpid == pid) break;*/ + /* More reliable: */ + if (kill(pid, 0)) + break; + } +} - /* skip over the dash */ - ++cmdpath; +/* Run all commands of a particular type */ +static void run_actions(int action_type) +{ + struct init_action *a; - /* find the last component in the command pathname */ - s = bb_get_last_path_component(cmdpath); + for (a = init_action_list; a; a = a->next) { + if (!(a->action_type & action_type)) + continue; - /* make a new argv[0] */ - if ((cmd[0] = malloc(strlen(s) + 2)) == NULL) { - message(LOG | CONSOLE, bb_msg_memory_exhausted); - cmd[0] = cmdpath; - } else { - cmd[0][0] = '-'; - strcpy(cmd[0] + 1, s); - } + if (a->action_type & (SYSINIT | WAIT | ONCE | CTRLALTDEL | SHUTDOWN)) { + pid_t pid = run(a); + if (a->action_type & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN)) + waitfor(pid); } - - if (a->action & ASKFIRST) { - char c; - /* - * Save memory by not exec-ing anything large (like a shell) - * before the user wants it. This is critical if swap is not - * enabled and the system has low memory. Generally this will - * be run on the second virtual console, and the first will - * be allowed to start a shell or whatever an init script - * specifies. + if (a->action_type & (RESPAWN | ASKFIRST)) { + /* Only run stuff with pid == 0. If pid != 0, + * it is already running */ - messageD(LOG, "Waiting for enter to start '%s'" - "(pid %d, terminal %s)\n", - cmdpath, getpid(), a->terminal); - bb_full_write(1, press_enter, sizeof(press_enter) - 1); - while(read(0, &c, 1) == 1 && c != '\n') - ; - } - - /* Log the process name and args */ - message(LOG, "Starting pid %d, console %s: '%s'", - getpid(), a->terminal, cmdpath); - -#if defined CONFIG_FEATURE_INIT_COREDUMPS - if (stat(CORE_ENABLE_FLAG_FILE, &sb) == 0) { - struct rlimit limit; - - limit.rlim_cur = RLIM_INFINITY; - limit.rlim_max = RLIM_INFINITY; - setrlimit(RLIMIT_CORE, &limit); + if (a->pid == 0) + a->pid = run(a); } -#endif - - /* Now run it. The new program will take over this PID, - * so nothing further in init.c should be run. */ - execv(cmdpath, cmd); - - /* We're still here? Some error happened. */ - message(LOG | CONSOLE, "Bummer, could not run '%s': %m", cmdpath); - _exit(-1); } - sigprocmask(SIG_SETMASK, &omask, NULL); - return pid; } -static int waitfor(const struct init_action *a) +static void new_init_action(uint8_t action_type, const char *command, const char *cons) { - int pid; - int status, wpid; - - pid = run(a); - while (1) { - wpid = wait(&status); - if (wpid > 0 && wpid != pid) { - continue; - } - if (wpid == pid) + struct init_action *a, **nextp; + + /* Scenario: + * old inittab: + * ::shutdown:umount -a -r + * ::shutdown:swapoff -a + * new inittab: + * ::shutdown:swapoff -a + * ::shutdown:umount -a -r + * On reload, we must ensure entries end up in correct order. + * To achieve that, if we find a matching entry, we move it + * to the end. + */ + nextp = &init_action_list; + while ((a = *nextp) != NULL) { + /* Don't enter action if it's already in the list, + * This prevents losing running RESPAWNs. + */ + if ((strcmp(a->command, command) == 0) + && (strcmp(a->terminal, cons) == 0) + ) { + /* Remove from list */ + *nextp = a->next; + /* Find the end of the list */ + while (*nextp != NULL) + nextp = &(*nextp)->next; + a->next = NULL; break; + } + nextp = &a->next; } - return wpid; + + if (!a) + a = xzalloc(sizeof(*a)); + /* Append to the end of the list */ + *nextp = a; + a->action_type = action_type; + safe_strncpy(a->command, command, sizeof(a->command)); + safe_strncpy(a->terminal, cons, sizeof(a->terminal)); + dbg_message(L_LOG | L_CONSOLE, "command='%s' action=%d tty='%s'\n", + a->command, a->action_type, a->terminal); } -/* Run all commands of a particular type */ -static void run_actions(int action) +/* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, + * then parse_inittab() simply adds in some default + * actions(i.e., runs INIT_SCRIPT and then starts a pair + * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB + * _is_ defined, but /etc/inittab is missing, this + * results in the same set of default behaviors. + */ +static void parse_inittab(void) { - struct init_action *a, *tmp; - - for (a = init_action_list; a; a = tmp) { - tmp = a->next; - if (a->action == action) { - if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) { - waitfor(a); - delete_init_action(a); - } else if (a->action & ONCE) { - run(a); - delete_init_action(a); - } else if (a->action & (RESPAWN | ASKFIRST)) { - /* Only run stuff with pid==0. If they have - * a pid, that means it is still running */ - if (a->pid == 0) { - a->pid = run(a); - } - } +#if ENABLE_FEATURE_USE_INITTAB + char *token[4]; + parser_t *parser = config_open2("/etc/inittab", fopen_for_read); + + if (parser == NULL) +#endif + { + /* No inittab file - set up some default behavior */ + /* Reboot on Ctrl-Alt-Del */ + new_init_action(CTRLALTDEL, "reboot", ""); + /* Umount all filesystems on halt/reboot */ + new_init_action(SHUTDOWN, "umount -a -r", ""); + /* Swapoff on halt/reboot */ + if (ENABLE_SWAPONOFF) + new_init_action(SHUTDOWN, "swapoff -a", ""); + /* Prepare to restart init when a QUIT is received */ + new_init_action(RESTART, "init", ""); + /* Askfirst shell on tty1-4 */ + new_init_action(ASKFIRST, bb_default_login_shell, ""); +//TODO: VC_1 instead of ""? "" is console -> ctty problems -> angry users + new_init_action(ASKFIRST, bb_default_login_shell, VC_2); + new_init_action(ASKFIRST, bb_default_login_shell, VC_3); + new_init_action(ASKFIRST, bb_default_login_shell, VC_4); + /* sysinit */ + new_init_action(SYSINIT, INIT_SCRIPT, ""); + return; + } + +#if ENABLE_FEATURE_USE_INITTAB + /* optional_tty:ignored_runlevel:action:command + * Delims are not to be collapsed and need exactly 4 tokens + */ + while (config_read(parser, token, 4, 0, "#:", + PARSE_NORMAL & ~(PARSE_TRIM | PARSE_COLLAPSE))) { + /* order must correspond to SYSINIT..RESTART constants */ + static const char actions[] ALIGN1 = + "sysinit\0""wait\0""once\0""respawn\0""askfirst\0" + "ctrlaltdel\0""shutdown\0""restart\0"; + int action; + char *tty = token[0]; + + if (!token[3]) /* less than 4 tokens */ + goto bad_entry; + action = index_in_strings(actions, token[2]); + if (action < 0 || !token[3][0]) /* token[3]: command */ + goto bad_entry; + /* turn .*TTY -> /dev/TTY */ + if (tty[0]) { + if (strncmp(tty, "/dev/", 5) == 0) + tty += 5; + tty = concat_path_file("/dev/", tty); } + new_init_action(1 << action, token[3], tty); + if (tty[0]) + free(tty); + continue; + bad_entry: + message(L_LOG | L_CONSOLE, "Bad inittab entry at line %d", + parser->lineno); } + config_close(parser); +#endif } -#ifndef DEBUG_INIT -static void init_reboot(unsigned long magic) +static void pause_and_low_level_reboot(unsigned magic) NORETURN; +static void pause_and_low_level_reboot(unsigned magic) { pid_t pid; - /* We have to fork here, since the kernel calls do_exit(0) in - * linux/kernel/sys.c, which can cause the machine to panic when - * the init process is killed.... */ - if ((pid = fork()) == 0) { + + /* Allow time for last message to reach serial console, etc */ + sleep(1); + + /* We have to fork here, since the kernel calls do_exit(EXIT_SUCCESS) + * in linux/kernel/sys.c, which can cause the machine to panic when + * the init process exits... */ + pid = vfork(); + if (pid == 0) { /* child */ reboot(magic); - _exit(0); + _exit(EXIT_SUCCESS); } - waitpid (pid, NULL, 0); + while (1) + sleep(1); } -static void shutdown_system(void) +static void run_shutdown_and_kill_processes(void) { - sigset_t block_signals; - - /* run everything to be run at "shutdown". This is done _prior_ + /* Run everything to be run at "shutdown". This is done _prior_ * to killing everything, in case people wish to use scripts to * shut things down gracefully... */ run_actions(SHUTDOWN); - /* first disable all our signals */ - sigemptyset(&block_signals); - sigaddset(&block_signals, SIGHUP); - sigaddset(&block_signals, SIGCHLD); - sigaddset(&block_signals, SIGUSR1); - sigaddset(&block_signals, SIGUSR2); - sigaddset(&block_signals, SIGINT); - sigaddset(&block_signals, SIGTERM); - sigaddset(&block_signals, SIGCONT); - sigaddset(&block_signals, SIGSTOP); - sigaddset(&block_signals, SIGTSTP); - sigprocmask(SIG_BLOCK, &block_signals, NULL); - - /* Allow Ctrl-Alt-Del to reboot system. */ - init_reboot(RB_ENABLE_CAD); - - message(CONSOLE | LOG, "The system is going down NOW !!"); - sync(); + message(L_CONSOLE | L_LOG, "The system is going down NOW!"); /* Send signals to every process _except_ pid 1 */ - message(CONSOLE | LOG, "Sending SIGTERM to all processes."); kill(-1, SIGTERM); - sleep(1); + message(L_CONSOLE | L_LOG, "Sent SIG%s to all processes", "TERM"); sync(); - - message(CONSOLE | LOG, "Sending SIGKILL to all processes."); - kill(-1, SIGKILL); sleep(1); + kill(-1, SIGKILL); + message(L_CONSOLE, "Sent SIG%s to all processes", "KILL"); sync(); + /*sleep(1); - callers take care about making a pause */ } -static void exec_signal(int sig) -{ - struct init_action *a, *tmp; - sigset_t unblock_signals; - - for (a = init_action_list; a; a = tmp) { - tmp = a->next; - if (a->action & RESTART) { - struct stat sb; - - shutdown_system(); - - /* unblock all signals, blocked in shutdown_system() */ - sigemptyset(&unblock_signals); - sigaddset(&unblock_signals, SIGHUP); - sigaddset(&unblock_signals, SIGCHLD); - sigaddset(&unblock_signals, SIGUSR1); - sigaddset(&unblock_signals, SIGUSR2); - sigaddset(&unblock_signals, SIGINT); - sigaddset(&unblock_signals, SIGTERM); - sigaddset(&unblock_signals, SIGCONT); - sigaddset(&unblock_signals, SIGSTOP); - sigaddset(&unblock_signals, SIGTSTP); - sigprocmask(SIG_UNBLOCK, &unblock_signals, NULL); - - /* Close whatever files are open. */ - close(0); - close(1); - close(2); - - /* Open the new terminal device */ - if ((device_open(a->terminal, O_RDWR)) < 0) { - if (stat(a->terminal, &sb) != 0) { - message(LOG | CONSOLE, "device '%s' does not exist.", a->terminal); - } else { - message(LOG | CONSOLE, "Bummer, can't open %s", a->terminal); - } - halt_signal(SIGUSR1); - } - - /* Make sure the terminal will act fairly normal for us */ - set_term(0); - /* Setup stdout, stderr on the supplied terminal */ - dup(0); - dup(0); - - messageD(CONSOLE | LOG, "Trying to re-exec %s", a->command); - execl(a->command, a->command, NULL); - - message(CONSOLE | LOG, "exec of '%s' failed: %m", - a->command); - sync(); - sleep(2); - init_reboot(RB_HALT_SYSTEM); - loop_forever(); - } - } -} +/* Signal handling by init: + * + * For process with PID==1, on entry kernel sets all signals to SIG_DFL + * and unmasks all signals. However, for process with PID==1, + * default action (SIG_DFL) on any signal is to ignore it, + * even for special signals SIGKILL and SIGCONT. + * Also, any signal can be caught or blocked. + * (but SIGSTOP is still handled specially, at least in 2.6.20) + * + * We install two kinds of handlers, "immediate" and "delayed". + * + * Immediate handlers execute at any time, even while, say, sysinit + * is running. + * + * Delayed handlers just set a flag variable. The variable is checked + * in the main loop and acted upon. + * + * halt/poweroff/reboot and restart have immediate handlers. + * They only traverse linked list of struct action's, never modify it, + * this should be safe to do even in signal handler. Also they + * never return. + * + * SIGSTOP and SIGTSTP have immediate handlers. They just wait + * for SIGCONT to happen. + * + * SIGHUP has a delayed handler, because modifying linked list + * of struct action's from a signal handler while it is manipulated + * by the program may be disastrous. + * + * Ctrl-Alt-Del has a delayed handler. Not a must, but allowing + * it to happen even somewhere inside "sysinit" would be a bit awkward. + * + * There is a tiny probability that SIGHUP and Ctrl-Alt-Del will collide + * and only one will be remembered and acted upon. + */ -static void halt_signal(int sig) +static void halt_reboot_pwoff(int sig) NORETURN; +static void halt_reboot_pwoff(int sig) { - shutdown_system(); - message(CONSOLE | LOG, -#if #cpu(s390) - /* Seems the s390 console is Wierd(tm). */ - "The system is halted. You may reboot now." -#else - "The system is halted. Press Reset or turn off power" -#endif - ); - sync(); - - /* allow time for last message to reach serial console */ - sleep(2); - - if (sig == SIGUSR2) - init_reboot(RB_POWER_OFF); - else - init_reboot(RB_HALT_SYSTEM); - - loop_forever(); + const char *m; + unsigned rb; + + run_shutdown_and_kill_processes(); + + m = "halt"; + rb = RB_HALT_SYSTEM; + if (sig == SIGTERM) { + m = "reboot"; + rb = RB_AUTOBOOT; + } else if (sig == SIGUSR2) { + m = "poweroff"; + rb = RB_POWER_OFF; + } + message(L_CONSOLE, "Requesting system %s", m); + pause_and_low_level_reboot(rb); + /* not reached */ } -static void reboot_signal(int sig) +/* The SIGSTOP/SIGTSTP handler + * NB: inside it, all signals except SIGCONT are masked + * via appropriate setup in sigaction(). + */ +static void stop_handler(int sig UNUSED_PARAM) { - shutdown_system(); - message(CONSOLE | LOG, "Please stand by while rebooting the system."); - sync(); - - /* allow time for last message to reach serial console */ - sleep(2); + smallint saved_bb_got_signal; + int saved_errno; - init_reboot(RB_AUTOBOOT); + saved_bb_got_signal = bb_got_signal; + saved_errno = errno; + signal(SIGCONT, record_signo); - loop_forever(); -} - -static void ctrlaltdel_signal(int sig) -{ - run_actions(CTRLALTDEL); -} + while (1) { + pid_t wpid; -/* The SIGSTOP & SIGTSTP handler */ -static void stop_handler(int sig) -{ - int saved_errno = errno; + if (bb_got_signal == SIGCONT) + break; + /* NB: this can accidentally wait() for a process + * which we waitfor() elsewhere! waitfor() must have + * code which is resilient against this. + */ + wpid = wait_any_nohang(NULL); + mark_terminated(wpid); + sleep(1); + } - got_cont = 0; - while (!got_cont) - pause(); - got_cont = 0; + signal(SIGCONT, SIG_DFL); errno = saved_errno; + bb_got_signal = saved_bb_got_signal; } -/* The SIGCONT handler */ -static void cont_handler(int sig) -{ - got_cont = 1; -} - -/* Reap any zombie processes that are reparented to init */ -static void child_handler(int sig) -{ - int status; - while ( wait3(&status, WNOHANG, NULL) > 0 ); -} - -#endif /* ! DEBUG_INIT */ - -static void new_init_action(int action, char *command, const char *cons) +/* Handler for QUIT - exec "restart" action, + * else (no such action defined) do nothing */ +static void restart_handler(int sig UNUSED_PARAM) { - struct init_action *new_action, *a; - - if (*cons == '\0') - cons = console; + struct init_action *a; - /* do not run entries if console device is not available */ - if (access(cons, R_OK | W_OK)) - return; - if (strcmp(cons, "/dev/null") == 0 && (action & ASKFIRST)) - return; + for (a = init_action_list; a; a = a->next) { + if (!(a->action_type & RESTART)) + continue; - new_action = calloc((size_t) (1), sizeof(struct init_action)); - if (!new_action) { - message(LOG | CONSOLE, "Memory allocation failure"); - loop_forever(); - } + /* Starting from here, we won't return. + * Thus don't need to worry about preserving errno + * and such. + */ + run_shutdown_and_kill_processes(); - /* Append to the end of the list */ - for (a = init_action_list; a && a->next; a = a->next) { - /* don't enter action if it's already in the list */ - if ((strcmp(a->command, command) == 0) && - (strcmp(a->terminal, cons) ==0)) { - free(new_action); - return; + /* Allow Ctrl-Alt-Del to reboot the system. + * This is how kernel sets it up for init, we follow suit. + */ + reboot(RB_ENABLE_CAD); /* misnomer */ + + if (open_stdio_to_tty(a->terminal)) { + dbg_message(L_CONSOLE, "Trying to re-exec %s", a->command); + /* Theoretically should be safe. + * But in practice, kernel bugs may leave + * unkillable processes, and wait() may block forever. + * Oh well. Hoping "new" init won't be too surprised + * by having children it didn't create. + */ + //while (wait(NULL) > 0) + // continue; + init_exec(a->command); } + /* Open or exec failed */ + pause_and_low_level_reboot(RB_HALT_SYSTEM); + /* not reached */ } - if (a) { - a->next = new_action; - } else { - init_action_list = new_action; - } - strcpy(new_action->command, command); - new_action->action = action; - strcpy(new_action->terminal, cons); -#if 0 /* calloc zeroed always */ - new_action->pid = 0; -#endif - messageD(LOG|CONSOLE, "command='%s' action='%d' terminal='%s'\n", - new_action->command, new_action->action, new_action->terminal); } -static void delete_init_action(struct init_action *action) +#if ENABLE_FEATURE_USE_INITTAB +static void reload_inittab(void) { - struct init_action *a, *b = NULL; + struct init_action *a, **nextp; + + message(L_LOG, "reloading /etc/inittab"); + + /* Disable old entries */ + for (a = init_action_list; a; a = a->next) + a->action_type = ONCE; + + /* Append new entries, or modify existing entries + * (set a->action_type) if cmd and device name + * match new ones. End result: only entries with + * a->action_type == ONCE are stale. + */ + parse_inittab(); + +#if ENABLE_FEATURE_KILL_REMOVED + /* Kill stale entries */ + /* Be nice and send SIGTERM first */ + for (a = init_action_list; a; a = a->next) + if (a->action_type == ONCE && a->pid != 0) + kill(a->pid, SIGTERM); + if (CONFIG_FEATURE_KILL_DELAY) { + /* NB: parent will wait in NOMMU case */ + if ((BB_MMU ? fork() : vfork()) == 0) { /* child */ + sleep(CONFIG_FEATURE_KILL_DELAY); + for (a = init_action_list; a; a = a->next) + if (a->action_type == ONCE && a->pid != 0) + kill(a->pid, SIGKILL); + _exit(EXIT_SUCCESS); + } + } +#endif - for (a = init_action_list; a; b = a, a = a->next) { - if (a == action) { - if (b == NULL) { - init_action_list = a->next; - } else { - b->next = a->next; - } + /* Remove stale (ONCE) and not useful (SYSINIT,WAIT) entries */ + nextp = &init_action_list; + while ((a = *nextp) != NULL) { + if (a->action_type & (ONCE | SYSINIT | WAIT)) { + *nextp = a->next; free(a); - break; + } else { + nextp = &a->next; } } -} - -/* Make sure there is enough memory to do something useful. * - * Calls "swapon -a" if needed so be sure /etc/fstab is present... */ -static void check_memory(void) -{ - struct stat statBuf; - - if (check_free_memory() > 1000) - return; -#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) - if (stat("/etc/fstab", &statBuf) == 0) { - /* swapon -a requires /proc typically */ - new_init_action(SYSINIT, "/bin/mount -t proc proc /proc", ""); - /* Try to turn on swap */ - new_init_action(SYSINIT, "/sbin/swapon -a", ""); - run_actions(SYSINIT); /* wait and removing */ - if (check_free_memory() < 1000) - goto goodnight; - } else - goto goodnight; - return; -#endif - - goodnight: - message(CONSOLE, "Sorry, your computer does not have enough memory."); - loop_forever(); + /* Not needed: */ + /* run_actions(RESPAWN | ASKFIRST); */ + /* - we return to main loop, which does this automagically */ } +#endif -/* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, - * then parse_inittab() simply adds in some default - * actions(i.e., runs INIT_SCRIPT and then starts a pair - * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB - * _is_ defined, but /etc/inittab is missing, this - * results in the same set of default behaviors. - */ -static void parse_inittab(void) +static int check_delayed_sigs(void) { -#ifdef CONFIG_FEATURE_USE_INITTAB - FILE *file; - char buf[INIT_BUFFS_SIZE], lineAsRead[INIT_BUFFS_SIZE]; - char tmpConsole[CONSOLE_BUFF_SIZE]; - char *id, *runlev, *action, *command, *eol; - const struct init_action_type *a = actions; + int sigs_seen = 0; - - file = fopen(INITTAB, "r"); - if (file == NULL) { - /* No inittab file -- set up some default behavior */ -#endif - /* Reboot on Ctrl-Alt-Del */ - new_init_action(CTRLALTDEL, "/sbin/reboot", ""); - /* Umount all filesystems on halt/reboot */ - new_init_action(SHUTDOWN, "/bin/umount -a -r", ""); -#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) - /* Swapoff on halt/reboot */ - new_init_action(SHUTDOWN, "/sbin/swapoff -a", ""); + while (1) { + smallint sig = bb_got_signal; + + if (!sig) + return sigs_seen; + bb_got_signal = 0; + sigs_seen = 1; +#if ENABLE_FEATURE_USE_INITTAB + if (sig == SIGHUP) + reload_inittab(); #endif - /* Prepare to restart init when a HUP is received */ - new_init_action(RESTART, "/sbin/init", ""); - /* Askfirst shell on tty1-4 */ - new_init_action(ASKFIRST, LOGIN_SHELL, ""); - new_init_action(ASKFIRST, LOGIN_SHELL, VC_2); - new_init_action(ASKFIRST, LOGIN_SHELL, VC_3); - new_init_action(ASKFIRST, LOGIN_SHELL, VC_4); - /* sysinit */ - new_init_action(SYSINIT, INIT_SCRIPT, ""); - - return; -#ifdef CONFIG_FEATURE_USE_INITTAB - } - - while (fgets(buf, INIT_BUFFS_SIZE, file) != NULL) { - /* Skip leading spaces */ - for (id = buf; *id == ' ' || *id == '\t'; id++); - - /* Skip the line if it's a comment */ - if (*id == '#' || *id == '\n') - continue; - - /* Trim the trailing \n */ - eol = strrchr(id, '\n'); - if (eol != NULL) - *eol = '\0'; - - /* Keep a copy around for posterity's sake (and error msgs) */ - strcpy(lineAsRead, buf); - - /* Separate the ID field from the runlevels */ - runlev = strchr(id, ':'); - if (runlev == NULL || *(runlev + 1) == '\0') { - message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); - continue; - } else { - *runlev = '\0'; - ++runlev; - } - - /* Separate the runlevels from the action */ - action = strchr(runlev, ':'); - if (action == NULL || *(action + 1) == '\0') { - message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); - continue; - } else { - *action = '\0'; - ++action; - } - - /* Separate the action from the command */ - command = strchr(action, ':'); - if (command == NULL || *(command + 1) == '\0') { - message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); - continue; - } else { - *command = '\0'; - ++command; - } - - /* Ok, now process it */ - for (a = actions; a->name != 0; a++) { - if (strcmp(a->name, action) == 0) { - if (*id != '\0') { - if(strncmp(id, "/dev/", 5) == 0) - id += 5; - strcpy(tmpConsole, "/dev/"); - safe_strncpy(tmpConsole + 5, id, - CONSOLE_BUFF_SIZE - 5); - id = tmpConsole; - } - new_init_action(a->action, command, id); - break; - } - } - if (a->name == 0) { - /* Choke on an unknown action */ - message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); - } + if (sig == SIGINT) + run_actions(CTRLALTDEL); } - fclose(file); - return; -#endif /* CONFIG_FEATURE_USE_INITTAB */ } -static void reload_signal(int sig) +int init_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int init_main(int argc UNUSED_PARAM, char **argv) { - message(LOG, "Reloading /etc/inittab"); - parse_inittab(); - run_actions(RESPAWN); - return; -} - -extern int init_main(int argc, char **argv) -{ - struct init_action *a; - pid_t wpid; - int status; + die_sleep = 30 * 24*60*60; /* if xmalloc would ever die... */ - if (argc > 1 && !strcmp(argv[1], "-q")) { - return kill_init(SIGHUP); + if (argv[1] && !strcmp(argv[1], "-q")) { + return kill(1, SIGHUP); } -#ifndef DEBUG_INIT - /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */ - if (getpid() != 1 -#ifdef CONFIG_FEATURE_INITRD - && strstr(bb_applet_name, "linuxrc") == NULL -#endif + + if (!DEBUG_INIT) { + /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */ + if (getpid() != 1 + && (!ENABLE_FEATURE_INITRD || !strstr(applet_name, "linuxrc")) ) { - bb_show_usage(); + bb_show_usage(); + } + /* Turn off rebooting via CTL-ALT-DEL - we get a + * SIGINT on CAD so we can shut things down gracefully... */ + reboot(RB_DISABLE_CAD); /* misnomer */ } - /* Set up sig handlers -- be sure to - * clear all of these in run() */ - signal(SIGHUP, exec_signal); - signal(SIGUSR1, halt_signal); - signal(SIGUSR2, halt_signal); - signal(SIGINT, ctrlaltdel_signal); - signal(SIGTERM, reboot_signal); - signal(SIGCONT, cont_handler); - signal(SIGSTOP, stop_handler); - signal(SIGTSTP, stop_handler); - signal(SIGCHLD, child_handler); - - /* Turn off rebooting via CTL-ALT-DEL -- we get a - * SIGINT on CAD so we can shut things down gracefully... */ - init_reboot(RB_DISABLE_CAD); -#endif /* Figure out where the default console should be */ console_init(); + set_sane_term(); + xchdir("/"); + setsid(); - /* Close whatever files are open, and reset the console. */ - close(0); - close(1); - close(2); + /* Make sure environs is set to something sane */ + putenv((char *) "HOME=/"); + putenv((char *) bb_PATH_root_path); + putenv((char *) "SHELL=/bin/sh"); + putenv((char *) "USER=root"); /* needed? why? */ - if (device_open(console, O_RDWR | O_NOCTTY) == 0) { - set_term(0); - close(0); - } + if (argv[1]) + xsetenv("RUNLEVEL", argv[1]); - chdir("/"); - setsid(); - { - const char * const *e; - /* Make sure environs is set to something sane */ - for(e = environment; *e; e++) - putenv((char *) *e); - } /* Hello world */ - message(MAYBE_CONSOLE | LOG, "init started: %s", bb_msg_full_version); + message(MAYBE_CONSOLE | L_LOG, "init started: %s", bb_banner); /* Make sure there is enough memory to do something useful. */ - check_memory(); + if (ENABLE_SWAPONOFF) { + struct sysinfo info; + + if (sysinfo(&info) == 0 + && (info.mem_unit ? : 1) * (long long)info.totalram < 1024*1024 + ) { + message(L_CONSOLE, "Low memory, forcing swapon"); + /* swapon -a requires /proc typically */ + new_init_action(SYSINIT, "mount -t proc proc /proc", ""); + /* Try to turn on swap */ + new_init_action(SYSINIT, "swapon -a", ""); + run_actions(SYSINIT); /* wait and removing */ + } + } /* Check if we are supposed to be in single user mode */ - if (argc > 1 && (!strcmp(argv[1], "single") || - !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) { + if (argv[1] + && (!strcmp(argv[1], "single") || !strcmp(argv[1], "-s") || LONE_CHAR(argv[1], '1')) + ) { + /* ??? shouldn't we set RUNLEVEL="b" here? */ /* Start a shell on console */ - new_init_action(RESPAWN, LOGIN_SHELL, ""); + new_init_action(RESPAWN, bb_default_login_shell, ""); } else { - /* Not in single user mode -- see what inittab says */ + /* Not in single user mode - see what inittab says */ /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, * then parse_inittab() simply adds in some default - * actions(i.e., runs INIT_SCRIPT and then starts a pair + * actions(i.e., INIT_SCRIPT and a pair * of "askfirst" shells */ parse_inittab(); } - /* Make the command line just say "init" -- thats all, nothing else */ - fixup_argv(argc, argv, "init"); +#if ENABLE_SELINUX + if (getenv("SELINUX_INIT") == NULL) { + int enforce = 0; + + putenv((char*)"SELINUX_INIT=YES"); + if (selinux_init_load_policy(&enforce) == 0) { + BB_EXECVP(argv[0], argv); + } else if (enforce > 0) { + /* SELinux in enforcing mode but load_policy failed */ + message(L_CONSOLE, "cannot load SELinux Policy. " + "Machine is in enforcing mode. Halting now."); + exit(EXIT_FAILURE); + } + } +#endif + + /* Make the command line just say "init" - thats all, nothing else */ + strncpy(argv[0], "init", strlen(argv[0])); + /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */ + while (*++argv) + memset(*argv, 0, strlen(*argv)); + + /* Set up signal handlers */ + if (!DEBUG_INIT) { + struct sigaction sa; + + bb_signals(0 + + (1 << SIGUSR1) /* halt */ + + (1 << SIGTERM) /* reboot */ + + (1 << SIGUSR2) /* poweroff */ + , halt_reboot_pwoff); + signal(SIGQUIT, restart_handler); /* re-exec another init */ + + /* Stop handler must allow only SIGCONT inside itself */ + memset(&sa, 0, sizeof(sa)); + sigfillset(&sa.sa_mask); + sigdelset(&sa.sa_mask, SIGCONT); + sa.sa_handler = stop_handler; + /* NB: sa_flags doesn't have SA_RESTART. + * It must be able to interrupt wait(). + */ + sigaction_set(SIGTSTP, &sa); /* pause */ + /* Does not work as intended, at least in 2.6.20. + * SIGSTOP is simply ignored by init: + */ + sigaction_set(SIGSTOP, &sa); /* pause */ - /* Now run everything that needs to be run */ + /* SIGINT (Ctrl-Alt-Del) must interrupt wait(), + * setting handler without SA_RESTART flag. + */ + bb_signals_recursive_norestart((1 << SIGINT), record_signo); + } + /* Now run everything that needs to be run */ /* First run the sysinit command */ run_actions(SYSINIT); - + check_delayed_sigs(); /* Next run anything that wants to block */ run_actions(WAIT); - + check_delayed_sigs(); /* Next run anything to be run only once */ run_actions(ONCE); - /* If there is nothing else to do, stop */ - if (init_action_list == NULL) { - message(LOG | CONSOLE, - "No more tasks for init -- sleeping forever."); - loop_forever(); - } - - /* Redefine SIGHUP to reread /etc/inittab */ - signal(SIGHUP, reload_signal); + /* Set up "reread /etc/inittab" handler. + * Handler is set up without SA_RESTART, it will interrupt syscalls. + */ + if (!DEBUG_INIT && ENABLE_FEATURE_USE_INITTAB) + bb_signals_recursive_norestart((1 << SIGHUP), record_signo); - /* Now run the looping stuff for the rest of forever */ + /* Now run the looping stuff for the rest of forever. + * NB: if delayed signal happened, avoid blocking in wait(). + */ while (1) { - /* run the respawn stuff */ - run_actions(RESPAWN); + int maybe_WNOHANG; - /* run the askfirst stuff */ - run_actions(ASKFIRST); + maybe_WNOHANG = check_delayed_sigs(); - /* Don't consume all CPU time -- sleep a bit */ + /* (Re)run the respawn/askfirst stuff */ + run_actions(RESPAWN | ASKFIRST); + maybe_WNOHANG |= check_delayed_sigs(); + + /* Don't consume all CPU time - sleep a bit */ sleep(1); + maybe_WNOHANG |= check_delayed_sigs(); - /* Wait for a child process to exit */ - wpid = wait(&status); - while (wpid > 0) { - /* Find out who died and clean up their corpse */ - for (a = init_action_list; a; a = a->next) { - if (a->pid == wpid) { - /* Set the pid to 0 so that the process gets - * restarted by run_actions() */ - a->pid = 0; - message(LOG, "Process '%s' (pid %d) exited. " - "Scheduling it for restart.", - a->command, wpid); - } + /* Wait for any child process(es) to exit. + * NB: "delayed" signals will also interrupt this wait(), + * bb_signals_recursive_norestart() set them up for that. + * This guarantees we won't be stuck here + * till next orphan dies. + */ + if (maybe_WNOHANG) + maybe_WNOHANG = WNOHANG; + while (1) { + pid_t wpid; + struct init_action *a; + + wpid = waitpid(-1, NULL, maybe_WNOHANG); + if (wpid <= 0) + break; + + a = mark_terminated(wpid); + if (a) { + message(L_LOG, "process '%s' (pid %d) exited. " + "Scheduling for restart.", + a->command, wpid); } - /* see if anyone else is waiting to be reaped */ - wpid = waitpid (-1, &status, WNOHANG); + /* See if anyone else is waiting to be reaped */ + maybe_WNOHANG = WNOHANG; } - } + } /* while (1) */ } - -/* -Local Variables: -c-file-style: "linux" -c-basic-offset: 4 -tab-width: 4 -End: -*/ diff --git a/release/src/router/busybox/init/init_shared.c b/release/src/router/busybox/init/init_shared.c deleted file mode 100644 index 339add13..00000000 --- a/release/src/router/busybox/init/init_shared.c +++ /dev/null @@ -1,97 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * Stuff shared between init, reboot, halt, and poweroff - * - * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -#include <signal.h> -#include <stdlib.h> -#include <unistd.h> -#include <getopt.h> -#include <sys/reboot.h> -#include <sys/reboot.h> -#include <sys/syslog.h> -#include "busybox.h" -#include "init_shared.h" - -extern int kill_init(int sig) -{ -#ifdef CONFIG_FEATURE_INITRD - /* don't assume init's pid == 1 */ - long *pid = find_pid_by_name("init"); - if (!pid || *pid<=0) { - pid = find_pid_by_name("linuxrc"); - if (!pid || *pid<=0) - bb_error_msg_and_die("no process killed"); - } - return(kill(*pid, sig)); -#else - return(kill(1, sig)); -#endif -} - -#ifndef CONFIG_INIT -const char * const bb_shutdown_format = "\r%s\n"; -extern int bb_shutdown_system(unsigned long magic) -{ - int pri = LOG_KERN|LOG_NOTICE|LOG_FACMASK; - const char *message; - - /* Don't kill ourself */ - signal(SIGTERM,SIG_IGN); - signal(SIGHUP,SIG_IGN); - setpgrp(); - - /* Allow Ctrl-Alt-Del to reboot system. */ -#ifndef RB_ENABLE_CAD -#define RB_ENABLE_CAD 0x89abcdef -#endif - reboot(RB_ENABLE_CAD); - - openlog(bb_applet_name, 0, pri); - - message = "\nThe system is going down NOW !!"; - syslog(pri, "%s", message); - printf(bb_shutdown_format, message); - - sync(); - - /* Send signals to every process _except_ pid 1 */ - message = "Sending SIGTERM to all processes."; - syslog(pri, "%s", message); - printf(bb_shutdown_format, message); - - kill(-1, SIGTERM); - sleep(1); - sync(); - - message = "Sending SIGKILL to all processes."; - syslog(pri, "%s", message); - printf(bb_shutdown_format, message); - - kill(-1, SIGKILL); - sleep(1); - - sync(); - - reboot(magic); - return 0; /* Shrug */ -} -#endif - diff --git a/release/src/router/busybox/init/init_shared.h b/release/src/router/busybox/init/init_shared.h deleted file mode 100644 index 1e4cfac9..00000000 --- a/release/src/router/busybox/init/init_shared.h +++ /dev/null @@ -1,3 +0,0 @@ -extern int kill_init(int sig); -extern int bb_shutdown_system(unsigned long magic); - diff --git a/release/src/router/busybox/init/mesg.c b/release/src/router/busybox/init/mesg.c index 7b8acf65..ca230f36 100644 --- a/release/src/router/busybox/init/mesg.c +++ b/release/src/router/busybox/init/mesg.c @@ -1,25 +1,12 @@ +/* vi: set sw=4 ts=4: */ /* - * mesg implementation for busybox + * mesg implementation for busybox * - * Copyright (c) 2002 Manuel Novoa III <mjn3@codepoet.org> + * Copyright (c) 2002 Manuel Novoa III <mjn3@codepoet.org> * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */ -#include <unistd.h> -#include <stdlib.h> #include "libbb.h" #ifdef USE_TTY_GROUP @@ -28,31 +15,32 @@ #define S_IWGRP_OR_S_IWOTH (S_IWGRP | S_IWOTH) #endif -extern int mesg_main(int argc, char *argv[]) +int mesg_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int mesg_main(int argc, char **argv) { struct stat sb; - char *tty; - char c; + const char *tty; + char c = 0; - if ((--argc == 0) - || ((argc == 1) && (((c = **++argv) == 'y') || (c == 'n')))) { - if ((tty = ttyname(STDERR_FILENO)) == NULL) { + if (--argc == 0 + || (argc == 1 && ((c = **++argv) == 'y' || c == 'n')) + ) { + tty = xmalloc_ttyname(STDERR_FILENO); + if (tty == NULL) { tty = "ttyname"; } else if (stat(tty, &sb) == 0) { + mode_t m; if (argc == 0) { - puts(((sb.st_mode & (S_IWGRP | S_IWOTH)) == - 0) ? "is n" : "is y"); + puts((sb.st_mode & (S_IWGRP|S_IWOTH)) ? "is y" : "is n"); return EXIT_SUCCESS; } - if (chmod - (tty, - (c == - 'y') ? sb.st_mode | (S_IWGRP_OR_S_IWOTH) : sb. - st_mode & ~(S_IWGRP | S_IWOTH)) == 0) { + m = (c == 'y') ? sb.st_mode | S_IWGRP_OR_S_IWOTH + : sb.st_mode & ~(S_IWGRP|S_IWOTH); + if (chmod(tty, m) == 0) { return EXIT_SUCCESS; } } - bb_perror_msg_and_die("%s", tty); + bb_simple_perror_msg_and_die(tty); } bb_show_usage(); } diff --git a/release/src/router/busybox/init/minit.c b/release/src/router/busybox/init/minit.c deleted file mode 100644 index 6645dc6c..00000000 --- a/release/src/router/busybox/init/minit.c +++ /dev/null @@ -1,612 +0,0 @@ -/* - * minit version 0.9.1 by Felix von Leitner - * ported to busybox by Glenn McGrath <bug1@optushome.com.au> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -#include <time.h> -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <limits.h> -#include <errno.h> -#include <sys/fcntl.h> -#include <sys/ioctl.h> -#include <sys/poll.h> -#include <sys/reboot.h> -#include <sys/socket.h> -#include <sys/types.h> -#include <sys/un.h> -#include <sys/wait.h> -#include <linux/kd.h> - -#include "busybox.h" - -#define MINITROOT "/etc/minit" - -static int i_am_init; -static int infd, outfd; - -extern char **environ; - -static struct process { - char *name; - pid_t pid; - char respawn; - char circular; - time_t startedat; - int __stdin, __stdout; - int logservice; -} *root; - -static int maxprocess = -1; - -static int processalloc = 0; - -static unsigned int fmt_ulong(char *dest, unsigned long i) -{ - register unsigned long len, tmp, len2; - - /* first count the number of bytes needed */ - for (len = 1, tmp = i; tmp > 9; ++len) - tmp /= 10; - if (dest) - for (tmp = i, dest += len, len2 = len + 1; --len2; tmp /= 10) - *--dest = (tmp % 10) + '0'; - return len; -} - -/* split buf into n strings that are separated by c. return n as *len. - * Allocate plus more slots and leave the first ofs of them alone. */ -static char **split(char *buf, int c, int *len, int plus, int ofs) -{ - int n = 1; - char **v = 0; - char **w; - - /* step 1: count tokens */ - char *s; - - for (s = buf; *s; s++) - if (*s == c) - n++; - /* step 2: allocate space for pointers */ - v = (char **) malloc((n + plus) * sizeof(char *)); - if (!v) - return 0; - w = v + ofs; - *w++ = buf; - for (s = buf;; s++) { - while (*s && *s != c) - s++; - if (*s == 0) - break; - if (*s == c) { - *s = 0; - *w++ = s + 1; - } - } - *len = w - v; - return v; -} - -static int openreadclose(char *fn, char **buf, unsigned long *len) -{ - int fd = open(fn, O_RDONLY); - - if (fd < 0) - return -1; - if (!*buf) { - *len = lseek(fd, 0, SEEK_END); - lseek(fd, 0, SEEK_SET); - *buf = (char *) malloc(*len + 1); - if (!*buf) { - close(fd); - return -1; - } - } - *len = read(fd, *buf, *len); - if (*len != (unsigned long) -1) - (*buf)[*len] = 0; - return close(fd); -} - -/* return index of service in process data structure or -1 if not found */ -static int findservice(char *service) -{ - int i; - - for (i = 0; i <= maxprocess; i++) { - if (!strcmp(root[i].name, service)) - return i; - } - return -1; -} - -/* look up process index in data structure by PID */ -static int findbypid(pid_t pid) -{ - int i; - - for (i = 0; i <= maxprocess; i++) { - if (root[i].pid == pid) - return i; - } - return -1; -} - -/* clear circular dependency detection flags */ -static void circsweep(void) -{ - int i; - - for (i = 0; i <= maxprocess; i++) - root[i].circular = 0; -} - -/* add process to data structure, return index or -1 */ -static int addprocess(struct process *p) -{ - if (maxprocess + 1 >= processalloc) { - struct process *fump; - - processalloc += 8; - if ((fump = - (struct process *) xrealloc(root, - processalloc * - sizeof(struct process))) == 0) - return -1; - root = fump; - } - memmove(&root[++maxprocess], p, sizeof(struct process)); - return maxprocess; -} - -/* load a service into the process data structure and return index or -1 - * if failed */ -static int loadservice(char *service) -{ - struct process tmp; - int fd; - - if (*service == 0) - return -1; - fd = findservice(service); - if (fd >= 0) - return fd; - if (chdir(MINITROOT) || chdir(service)) - return -1; - if (!(tmp.name = strdup(service))) - return -1; - tmp.pid = 0; - fd = open("respawn", O_RDONLY); - if (fd >= 0) { - tmp.respawn = 1; - close(fd); - } else - tmp.respawn = 0; - tmp.startedat = 0; - tmp.circular = 0; - tmp.__stdin = 0; - tmp.__stdout = 1; - { - char *logservice = alloca(strlen(service) + 5); - - strcpy(logservice, service); - strcat(logservice, "/log"); - tmp.logservice = loadservice(logservice); - if (tmp.logservice >= 0) { - int pipefd[2]; - - if (pipe(pipefd)) - return -1; - root[tmp.logservice].__stdin = pipefd[0]; - tmp.__stdout = pipefd[1]; - } - } - return (addprocess(&tmp)); -} - -/* usage: isup(findservice("sshd")). - * returns nonzero if process is up */ -static int isup(int service) -{ - if (service < 0) - return 0; - return (root[service].pid != 0); -} - -static void opendevconsole(void) -{ - int fd; - - if ((fd = open("/dev/console", O_RDWR | O_NOCTTY)) >= 0) { - dup2(fd, 0); - dup2(fd, 1); - dup2(fd, 2); - if (fd > 2) - close(fd); - } -} - -/* called from inside the service directory, return the PID or 0 on error */ -static pid_t forkandexec(int pause_flag, int service) -{ - char **argv = 0; - int count = 0; - pid_t p; - int fd; - unsigned long len; - char *s = 0; - int argc; - char *argv0 = 0; - - again: - switch (p = fork()) { - case (pid_t) - 1: - if (count > 3) - return 0; - sleep(++count * 2); - goto again; - case 0: - /* child */ - - if (i_am_init) { - ioctl(0, TIOCNOTTY, 0); - setsid(); - opendevconsole(); - tcsetpgrp(0, getpgrp()); - } - close(infd); - close(outfd); - if (pause_flag) { - struct timespec req; - - req.tv_sec = 0; - req.tv_nsec = 500000000; - nanosleep(&req, 0); - } - if (!openreadclose("params", &s, &len)) { - argv = split(s, '\n', &argc, 2, 1); - if (argv[argc - 1]) - argv[argc - 1] = 0; - else - argv[argc] = 0; - } else { - argv = (char **) xmalloc(2 * sizeof(char *)); - argv[1] = 0; - } - argv0 = (char *) xmalloc(PATH_MAX + 1); - if (!argv || !argv0) - goto abort; - if (readlink("run", argv0, PATH_MAX) < 0) { - if (errno != EINVAL) - goto abort; /* not a symbolic link */ - argv0 = strdup("./run"); - } - argv[0] = strrchr(argv0, '/'); - if (argv[0]) - argv[0]++; - else - argv[0] = argv0; - if (root[service].__stdin != 0) - dup2(root[service].__stdin, 0); - if (root[service].__stdout != 1) { - dup2(root[service].__stdout, 1); - dup2(root[service].__stdout, 2); - } - { - int i; - - for (i = 3; i < 1024; ++i) - close(i); - } - execve(argv0, argv, environ); - _exit(0); - abort: - free(argv0); - free(argv); - _exit(0); - default: - fd = open("sync", O_RDONLY); - if (fd >= 0) { - pid_t p2; - - close(fd); - p2 = waitpid(p, 0, 0); - return 1; - } - return p; - } -} - -/* start a service, return nonzero on error */ -static int startnodep(int service, int pause_flag) -{ - /* step 1: see if the process is already up */ - if (isup(service)) - return 0; - - /* step 2: fork and exec service, put PID in data structure */ - if (chdir(MINITROOT) || chdir(root[service].name)) - return -1; - root[service].startedat = time(0); - root[service].pid = forkandexec(pause_flag, service); - return root[service].pid; -} - -static int startservice(int service, int pause_flag) -{ - int dir = -1; - unsigned long len; - char *s = 0; - pid_t pid; - - if (service < 0) - return 0; - if (root[service].circular) - return 0; - root[service].circular = 1; - if (root[service].logservice >= 0) - startservice(root[service].logservice, pause_flag); - if (chdir(MINITROOT) || chdir(root[service].name)) - return -1; - if ((dir = open(".", O_RDONLY)) >= 0) { - if (!openreadclose("depends", &s, &len)) { - char **deps; - int depc, i; - - deps = split(s, '\n', &depc, 0, 0); - for (i = 0; i < depc; i++) { - int service_index; - - if (deps[i][0] == '#') - continue; - service_index = loadservice(deps[i]); - if (service_index >= 0 && root[service_index].pid != 1) - startservice(service_index, 0); - } - fchdir(dir); - } - pid = startnodep(service, pause_flag); - close(dir); - dir = -1; - return pid; - } - return 0; -} - -static void sulogin(void) -{ - /* exiting on an initialization failure is not a good idea for init */ - char *argv[] = { "sulogin", 0 }; - execve("/sbin/sulogin", argv, environ); - exit(1); -} - -static void handlekilled(pid_t killed) -{ - int i; - - if (killed == (pid_t) - 1) { - write(2, "all services exited.\n", 21); - exit(0); - } - if (killed == 0) - return; - i = findbypid(killed); - if (i >= 0) { - root[i].pid = 0; - if (root[i].respawn) { - circsweep(); - startservice(i, time(0) - root[i].startedat < 1); - } else { - root[i].startedat = time(0); - root[i].pid = 1; - } - } -} - -static void childhandler(void) -{ - int status; - pid_t killed; - - do { - killed = waitpid(-1, &status, WNOHANG); - handlekilled(killed); - } while (killed && killed != (pid_t) - 1); -} - -static volatile int dowinch = 0; -static volatile int doint = 0; - -static void sigchild(int whatever) -{ -} -static void sigwinch(int sig) -{ - dowinch = 1; -} -static void sigint(int sig) -{ - doint = 1; -} - -extern int minit_main(int argc, char *argv[]) -{ - /* Schritt 1: argv[1] als Service nehmen und starten */ - struct pollfd pfd; - time_t last = time(0); - int nfds = 1; - int count = 0; - int i; - - infd = open("/etc/minit/in", O_RDWR); - outfd = open("/etc/minit/out", O_RDWR | O_NONBLOCK); - if (getpid() == 1) { - int fd; - - i_am_init = 1; - reboot(0); - if ((fd = open("/dev/console", O_RDWR | O_NOCTTY))) { - ioctl(fd, KDSIGACCEPT, SIGWINCH); - close(fd); - } else - ioctl(0, KDSIGACCEPT, SIGWINCH); - } -/* signal(SIGPWR,sighandler); don't know what to do about it */ -/* signal(SIGHUP,sighandler); ??? */ - { - struct sigaction sa; - - sigemptyset(&sa.sa_mask); - sa.sa_sigaction = 0; - sa.sa_flags = SA_RESTART | SA_NOCLDSTOP; - sa.sa_handler = sigchild; - sigaction(SIGCHLD, &sa, 0); - sa.sa_handler = sigint; - sigaction(SIGINT, &sa, 0); /* ctrl-alt-del */ - sa.sa_handler = sigwinch; - sigaction(SIGWINCH, &sa, 0); /* keyboard request */ - } - if (infd < 0 || outfd < 0) { - puts("minit: could not open /etc/minit/in or /etc/minit/out\n"); - sulogin(); - nfds = 0; - } else - pfd.fd = infd; - pfd.events = POLLIN; - - for (i = 1; i < argc; i++) { - circsweep(); - if (startservice(loadservice(argv[i]), 0)) - count++; - } - circsweep(); - if (!count) - startservice(loadservice("default"), 0); - for (;;) { - char buf[1501]; - time_t now; - - if (doint) { - doint = 0; - startservice(loadservice("ctrlaltdel"), 0); - } - if (dowinch) { - dowinch = 0; - startservice(loadservice("kbreq"), 0); - } - childhandler(); - now = time(0); - if (now < last || now - last > 30) { - /* The system clock was reset. Compensate. */ - long diff = last - now; - int j; - - for (j = 0; j <= maxprocess; ++j) { - root[j].startedat -= diff; - } - } - last = now; - switch (poll(&pfd, nfds, 5000)) { - case -1: - if (errno == EINTR) { - childhandler(); - break; - } - opendevconsole(); - puts("poll failed!\n"); - sulogin(); - /* what should we do if poll fails?! */ - break; - case 1: - i = read(infd, buf, 1500); - if (i > 1) { - pid_t pid; - int idx = 0; - int tmp; - - buf[i] = 0; - - if (buf[0] != 's' && ((idx = findservice(buf + 1)) < 0)) - error: - write(outfd, "0", 1); - else { - switch (buf[0]) { - case 'p': - write(outfd, buf, fmt_ulong(buf, root[idx].pid)); - break; - case 'r': - root[idx].respawn = 0; - goto ok; - case 'R': - root[idx].respawn = 1; - goto ok; - case 'C': - if (kill(root[idx].pid, 0)) { /* check if still active */ - handlekilled(root[idx].pid); /* no!?! remove form active list */ - goto error; - } - goto ok; - break; - case 'P': - { - unsigned char *x = buf + strlen(buf) + 1; - unsigned char c; - - tmp = 0; - while ((c = *x++ - '0') < 10) - tmp = tmp * 10 + c; - } - if (tmp > 0) { - if (kill(tmp, 0)) - goto error; - pid = tmp; - } - root[idx].pid = tmp; - goto ok; - case 's': - idx = loadservice(buf + 1); - if (idx < 0) - goto error; - if (root[idx].pid < 2) { - root[idx].pid = 0; - circsweep(); - idx = startservice(idx, 0); - if (idx == 0) { - write(outfd, "0", 1); - break; - } - } - ok: - write(outfd, "1", 1); - break; - case 'u': - write(outfd, buf, - fmt_ulong(buf, time(0) - root[idx].startedat)); - } - } - } - break; - default: - break; - } - } -} diff --git a/release/src/router/busybox/init/msvc.c b/release/src/router/busybox/init/msvc.c deleted file mode 100644 index d72ddce1..00000000 --- a/release/src/router/busybox/init/msvc.c +++ /dev/null @@ -1,300 +0,0 @@ -/* - * minit version 0.9.1 by Felix von Leitner - * ported to busybox by Glenn McGrath <bug1@optushome.com.au> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -#include <sys/fcntl.h> -#include <sys/file.h> -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#include "busybox.h" - -static int infd, outfd; - -static char buf[1500]; - -static unsigned int fmt_ulong(char *dest, unsigned long i) -{ - register unsigned long len, tmp, len2; - - /* first count the number of bytes needed */ - for (len = 1, tmp = i; tmp > 9; ++len) - tmp /= 10; - if (dest) - for (tmp = i, dest += len, len2 = len + 1; --len2; tmp /= 10) - *--dest = (tmp % 10) + '0'; - return len; -} - -static void addservice(char *service) -{ - char *service_ptr; - - if (strncmp(service, "/etc/minit/", 11) == 0) { - service += 11; - } - - while ((service_ptr = last_char_is(service, '/')) != NULL) { - *service_ptr = 0; - } - strncpy(buf + 1, service, 1400); - buf[1400] = 0; -} - -static int addreadwrite(char *service) -{ - addservice(service); - write(infd, buf, strlen(buf)); - return read(outfd, buf, 1500); -} - -/* return PID, 0 if error */ -static pid_t __readpid(char *service) -{ - int len; - - buf[0] = 'p'; - len = addreadwrite(service); - if (len < 0) - return 0; - buf[len] = 0; - return atoi(buf); -} - -/* return nonzero if error */ -static int respawn(char *service, int yesno) -{ - int len; - - buf[0] = yesno ? 'R' : 'r'; - len = addreadwrite(service); - return (len != 1 || buf[0] == '0'); -} - -/* return nonzero if error */ -static int startservice(char *service) -{ - int len; - - buf[0] = 's'; - len = addreadwrite(service); - return (len != 1 || buf[0] == '0'); -} - -extern int msvc_main(int argc, char **argv) -{ - if (argc < 2) { - bb_show_usage(); - } - infd = bb_xopen("/etc/minit/in", O_WRONLY); - outfd = bb_xopen("/etc/minit/out", O_RDONLY); - - while (lockf(infd, F_LOCK, 1)) { - bb_perror_msg("could not aquire lock!\n"); - sleep(1); - } - - if (argc == 2) { - pid_t pid = __readpid(argv[1]); - - if (buf[0] != '0') { - int len; - int up_time; - - printf("%s: ", argv[1]); - if (pid == 0) - printf("down "); - else if (pid == 1) - printf("finished "); - else { - printf("up (pid %d) ", pid); - } - - buf[0] = 'u'; - len = addreadwrite(argv[1]); - if (len < 0) { - up_time = 0; - } else { - buf[len] = 0; - up_time = atoi(buf); - } - printf("%d seconds\n", up_time); - - if (pid == 0) - return 2; - else if (pid == 1) - return 3; - else - return 0; - } else { - bb_error_msg_and_die("no such service"); - } - } else { - int i; - int ret = 0; - int sig = 0; - pid_t pid; - - if (argv[1][0] == '-') { - switch (argv[1][1]) { - case 'g': - for (i = 2; i < argc; ++i) { - pid = __readpid(argv[i]); - if (pid < 2) { - if (pid == 1) { - bb_error_msg("%s, service termination", argv[i]); - } else { - bb_error_msg("%s, no such service", argv[i]); - } - ret = 1; - } - printf("%d\n", pid); - } - break; - case 'p': - sig = SIGSTOP; - goto dokill; - break; - case 'c': - sig = SIGCONT; - goto dokill; - break; - case 'h': - sig = SIGHUP; - goto dokill; - break; - case 'a': - sig = SIGALRM; - goto dokill; - break; - case 'i': - sig = SIGINT; - goto dokill; - break; - case 't': - sig = SIGTERM; - goto dokill; - break; - case 'k': - sig = SIGKILL; - goto dokill; - break; - case 'o': - for (i = 2; i < argc; ++i) - if (startservice(argv[i]) || respawn(argv[i], 0)) { - bb_error_msg("Couldnt not start %s\n", argv[i]); - ret = 1; - } - break; - case 'd': - for (i = 2; i < argc; ++i) { - pid = __readpid(argv[i]); - if (pid == 0) { - bb_error_msg("%s, no such service\n", argv[i]); - ret = 1; - } else if (pid == 1) - continue; - if (respawn(argv[i], 0) || kill(pid, SIGTERM) - || kill(pid, SIGCONT)); - } - break; - case 'u': - for (i = 2; i < argc; ++i) { - if (startservice(argv[i]) || respawn(argv[i], 1)) { - bb_error_msg("Couldnt not start %s\n", argv[i]); - ret = 1; - } - break; - } - case 'C': - for (i = 2; i < argc; ++i) { - int len; - - buf[0] = 'C'; - len = addreadwrite(argv[i]); - if (len != 1 || buf[0] == '0') { - bb_error_msg("%s has terminated or was killed\n", - argv[i]); - ret = 1; - } - } - break; - case 'P': - pid = atoi(argv[1] + 2); - if (pid > 1) { - char *tmp; - int len; - - buf[0] = 'P'; - addservice(argv[2]); - tmp = buf + strlen(buf) + 1; - tmp[fmt_ulong(tmp, pid)] = 0; - write(infd, buf, strlen(buf) + strlen(tmp) + 2); - len = read(outfd, buf, 1500); - if (len != 1 || buf[0] == '0') { - bb_error_msg_and_die("Couldnt not set pid of service %s\n", argv[2]); - } - } - break; - default: - bb_show_usage(); - } - } else { - bb_show_usage(); - } - return ret; -dokill: - for (i = 2; i < argc; i++) { - pid = __readpid(argv[i]); - if (!pid) { - bb_error_msg("%s no such service\n", argv[i]); - ret = 1; - } - if (kill(pid, sig)) { - bb_error_msg("%s, could not send signal %d to PID %d\n", - argv[i], sig, pid); - ret = 1; - } - } - return ret; - } -} - -/* - -u Up. If the service is not running, start it. If the service stops, - restart it. - -d Down. If the service is running, send it a TERM signal and then a CONT - signal. After it stops, do not restart it. - -o Once. If the service is not running, start it. Do not restart it if it - stops. - -r Tell supervise that the service is normally running; this affects status - messages. - -s Tell supervise that the service is normally stopped; this affects status - messages. - -p Pause. Send the service a STOP signal. - -c Continue. Send the service a CONT signal. - -h Hangup. Send the service a HUP signal. - -a Alarm. Send the service an ALRM signal. - -i Interrupt. Send the service an INT signal. - -t Terminate. Send the service a TERM signal. - -k Kill. Send the service a KILL signal. - -x Exit. supervise will quit as soon as the service is down. -*/ diff --git a/release/src/router/busybox/init/pidfilehack.c b/release/src/router/busybox/init/pidfilehack.c deleted file mode 100644 index a2d905b5..00000000 --- a/release/src/router/busybox/init/pidfilehack.c +++ /dev/null @@ -1,78 +0,0 @@ -/* - * minit version 0.9.1 by Felix von Leitner - * ported to busybox by Glenn McGrath <bug1@optushome.com.au> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -#include <unistd.h> -#include <errno.h> -#include <stdlib.h> -#include <sys/fcntl.h> - -#include "busybox.h" -/* purpose: argv[1] is the full path to a PID file, - * argv+2 is the daemon to run. - * the daemon is expected to fork in the background and write its PID in - * the pid file. - */ - -extern int pidfilehack_main(int argc, char **argv) -{ - int count = 0; - - if (argc < 3) { - bb_show_usage(); - - } - if (unlink(argv[2]) && (errno != ENOENT)) { - bb_perror_msg("could not remove pid file"); - } - switch (fork()) { - case -1: - bb_perror_msg("could not fork"); - return 2; - case 0: /* child */ - execv(argv[3], argv + 3); - bb_perror_msg("execvp failed"); - return 3; - } - do { - int fd = open(argv[2], O_RDONLY); - - if (fd >= 0) { - static char buf[100] = "-P"; - int len = read(fd, buf + 2, 100); - - close(fd); - if (len > 0) { - char *_argv[] = { "msvc", 0, 0, 0 }; - if (buf[len + 1] == '\n') { - buf[len + 1] = 0; - } else { - buf[len + 2] = 0; - } - _argv[1] = buf; - _argv[2] = argv[1]; - execvp(_argv[0], _argv); - bb_perror_msg("execvp failed"); - return 0; - } - } - sleep(1); - } while (++count < 30); - - return(0); -} diff --git a/release/src/router/busybox/init/poweroff.c b/release/src/router/busybox/init/poweroff.c deleted file mode 100644 index e5d45dfa..00000000 --- a/release/src/router/busybox/init/poweroff.c +++ /dev/null @@ -1,56 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * Mini poweroff implementation for busybox - * - * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -#include <signal.h> -#include <stdlib.h> -#include <unistd.h> -#include <getopt.h> -#include <sys/reboot.h> -#include "busybox.h" -#include "init_shared.h" - - -extern int poweroff_main(int argc, char **argv) -{ - char *delay; /* delay in seconds before rebooting */ - - if(bb_getopt_ulflags(argc, argv, "d:", &delay)) { - sleep(atoi(delay)); - } - -#ifndef CONFIG_INIT -#ifndef RB_POWER_OFF -#define RB_POWER_OFF 0x4321fedc -#endif - return(bb_shutdown_system(RB_POWER_OFF)); -#else - return kill_init(SIGUSR2); -#endif -} - -/* -Local Variables: -c-file-style: "linux" -c-basic-offset: 4 -tab-width: 4 -End: -*/ diff --git a/release/src/router/busybox/init/reboot.c b/release/src/router/busybox/init/reboot.c deleted file mode 100644 index 185152a7..00000000 --- a/release/src/router/busybox/init/reboot.c +++ /dev/null @@ -1,56 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * Mini reboot implementation for busybox - * - * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -#include <signal.h> -#include <stdlib.h> -#include <unistd.h> -#include <getopt.h> -#include <sys/reboot.h> -#include "busybox.h" -#include "init_shared.h" - - -extern int reboot_main(int argc, char **argv) -{ - char *delay; /* delay in seconds before rebooting */ - - if(bb_getopt_ulflags(argc, argv, "d:", &delay)) { - sleep(atoi(delay)); - } - -#ifndef CONFIG_INIT -#ifndef RB_AUTOBOOT -#define RB_AUTOBOOT 0x01234567 -#endif - return(bb_shutdown_system(RB_AUTOBOOT)); -#else - return kill_init(SIGTERM); -#endif -} - -/* -Local Variables: -c-file-style: "linux" -c-basic-offset: 4 -tab-width: 4 -End: -*/ |