imported original firmware WRT54GL_v4.30.11_11_US

1 files changed, 1040 insertions, 0 deletions

diff --git a/release/src/router/busybox/init.c b/release/src/router/busybox/init.c
new file mode 100644
index 00000000..d19b7692
--- /dev/null
+++ b/release/src/router/busybox/init.c
@@ -0,0 +1,1040 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini init implementation for busybox
+ *
+ *
+ * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
+ * 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
+ *
+ */
+
+/* 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 <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 "busybox.h"
+#ifdef BB_SYSLOGD
+# include <sys/syslog.h>
+#endif
+
+
+/* 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 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;
+#endif
+
+#if (__GNU_LIBRARY__ > 5) || defined(__dietlibc__) 
+  #include <sys/reboot.h>
+  #define init_reboot(magic) reboot(magic)
+#else
+  #define init_reboot(magic) reboot(0xfee1dead, 672274793, magic)
+#endif
+
+#ifndef _PATH_STDPATH
+#define _PATH_STDPATH	"/usr/bin:/bin:/usr/sbin:/sbin"
+#endif
+
+
+#if defined BB_FEATURE_INIT_COREDUMPS
+/*
+ * 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....
+ */
+#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))
+
+#if __GNU_LIBRARY__ > 5
+	#include <sys/kdaemon.h>
+#else
+	extern int bdflush (int func, long int data);
+#endif
+
+
+#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 */
+//static const int MAXENV = 16;	/* Number of env. vars */
+static const int LOG = 0x1;
+static const int CONSOLE = 0x2;
+
+/* Allowed init action types */
+typedef enum {
+	SYSINIT = 1,
+	RESPAWN,
+	ASKFIRST,
+	WAIT,
+	ONCE,
+	CTRLALTDEL,
+	SHUTDOWN
+} initActionEnum;
+
+/* A mapping between "inittab" action name strings and action type codes. */
+typedef struct initActionType {
+	const char *name;
+	initActionEnum action;
+} initActionType;
+
+static const struct initActionType actions[] = {
+	{"sysinit", SYSINIT},
+	{"respawn", RESPAWN},
+	{"askfirst", ASKFIRST},
+	{"wait", WAIT},
+	{"once", ONCE},
+	{"ctrlaltdel", CTRLALTDEL},
+	{"shutdown", SHUTDOWN},
+	{0, 0}
+};
+
+/* Set up a linked list of initActions, to be read from inittab */
+typedef struct initActionTag initAction;
+struct initActionTag {
+	pid_t pid;
+	char process[256];
+	char console[256];
+	initAction *nextPtr;
+	initActionEnum action;
+};
+static initAction *initActionList = NULL;
+
+
+static char *secondConsole = VC_2;
+static char *thirdConsole  = VC_3;
+static char *fourthConsole = VC_4;
+static char *log           = VC_5;
+static int  kernelVersion  = 0;
+static char termType[32]   = "TERM=linux";
+static char console[32]    = _PATH_CONSOLE;
+
+static void delete_initAction(initAction * action);
+
+static void loop_forever()
+{
+	while (1)
+		sleep (1);
+}
+
+/* Print a message to the specified device.
+ * Device may be bitwise-or'd from LOG | CONSOLE */
+static void message(int device, char *fmt, ...)
+		   __attribute__ ((format (printf, 2, 3)));
+static void message(int device, char *fmt, ...)
+{
+	va_list arguments;
+	int fd;
+
+#ifdef BB_SYSLOGD
+
+	/* Log the message to syslogd */
+	if (device & LOG) {
+		char msg[1024];
+
+		va_start(arguments, fmt);
+		vsnprintf(msg, sizeof(msg), fmt, arguments);
+		va_end(arguments);
+		openlog(applet_name, 0, LOG_USER);
+		syslog(LOG_USER|LOG_INFO, msg);
+		closelog();
+	}
+#else
+	static int log_fd = -1;
+
+	/* Take full control of the log tty, and never close it.
+	 * It's mine, all mine!  Muhahahaha! */
+	if (log_fd < 0) {
+		if (log == NULL) {
+			/* don't even try to log, because there is no such console */
+			log_fd = -2;
+			/* log to main console instead */
+			device = CONSOLE;
+		} else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) {
+			log_fd = -2;
+			fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log);
+			log = NULL;
+			device = CONSOLE;
+		}
+	}
+	if ((device & LOG) && (log_fd >= 0)) {
+		va_start(arguments, fmt);
+		vdprintf(log_fd, fmt, arguments);
+		va_end(arguments);
+	}
+#endif
+
+	if (device & CONSOLE) {
+		/* Always send console messages to /dev/console so people will see them. */
+		if (
+			(fd =
+			 device_open(_PATH_CONSOLE,
+						 O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
+			va_start(arguments, fmt);
+			vdprintf(fd, fmt, arguments);
+			va_end(arguments);
+			close(fd);
+		} else {
+			fprintf(stderr, "Bummer, can't print: ");
+			va_start(arguments, fmt);
+			vfprintf(stderr, fmt, arguments);
+			va_end(arguments);
+		}
+	}
+}
+
+/* Set terminal settings to reasonable defaults */
+static void set_term(int fd)
+{
+	struct termios tty;
+
+	tcgetattr(fd, &tty);
+
+	/* set control chars */
+	tty.c_cc[VINTR]  = 3;	/* C-c */
+	tty.c_cc[VQUIT]  = 28;	/* C-\ */
+	tty.c_cc[VERASE] = 127; /* C-? */
+	tty.c_cc[VKILL]  = 21;	/* C-u */
+	tty.c_cc[VEOF]   = 4;	/* C-d */
+	tty.c_cc[VSTART] = 17;	/* C-q */
+	tty.c_cc[VSTOP]  = 19;	/* C-s */
+	tty.c_cc[VSUSP]  = 26;	/* C-z */
+
+	/* use line dicipline 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;
+
+	/* output modes */
+	tty.c_oflag = OPOST | ONLCR;
+
+	/* local modes */
+	tty.c_lflag =
+		ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN;
+
+	tcsetattr(fd, TCSANOW, &tty);
+}
+
+/* How much memory does this machine have?
+   Units are kBytes to avoid overflow on 4GB machines */
+static int check_free_memory()
+{
+	struct sysinfo info;
+	unsigned int result, u, s=10;
+
+	if (sysinfo(&info) != 0) {
+		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--; }
+	result = (info.totalram>>s) + (info.totalswap>>s);
+	result = result*u;
+	if (result < 0) result = INT_MAX;
+	return result;
+}
+
+static void console_init()
+{
+	int fd;
+	int tried_devcons = 0;
+	int tried_vtprimary = 0;
+	struct vt_stat vt;
+	struct serial_struct sr;
+	char *s;
+
+	if ((s = getenv("TERM")) != NULL) {
+		snprintf(termType, sizeof(termType) - 1, "TERM=%s", s);
+	}
+
+	if ((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 */
+	else if ((s = getenv("console")) != NULL) {
+		/* 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
+	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_devcons++;
+		}
+	}
+
+	while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
+		/* Can't open selected console -- try /dev/console */
+		if (!tried_devcons) {
+			tried_devcons++;
+			safe_strncpy(console, _PATH_CONSOLE, sizeof(console));
+			continue;
+		}
+		/* Can't open selected console -- try vt1 */
+		if (!tried_vtprimary) {
+			tried_vtprimary++;
+			safe_strncpy(console, VC_1, sizeof(console));
+			continue;
+		}
+		break;
+	}
+	if (fd < 0) {
+		/* Perhaps we should panic here? */
+		safe_strncpy(console, "/dev/null", sizeof(console));
+	} else {
+		/* check for serial console and disable logging to tty5 & running a
+		   * shell to tty2-4 */
+		if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
+			log = NULL;
+			secondConsole = NULL;
+			thirdConsole = NULL;
+			fourthConsole = NULL;
+			/* Force the TERM setting to vt102 for serial console --
+			 * iff TERM is set to linux (the default) */
+			if (strcmp( termType, "TERM=linux" ) == 0)
+				safe_strncpy(termType, "TERM=vt102", sizeof(termType));
+			message(LOG | CONSOLE,
+					"serial console detected.  Disabling virtual terminals.\r\n");
+		}
+		close(fd);
+	}
+	message(LOG, "console=%s\n", console);
+}
+	
+static void fixup_argv(int argc, char **argv, char *new_argv0)
+{
+	int len;
+	/* Fix up argv[0] to be certain we claim to be init */
+	len = strlen(argv[0]);
+	memset(argv[0], 0, len);
+	strncpy(argv[0], new_argv0, len);
+
+	/* 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++;
+	}
+}
+
+
+static pid_t run(char *command, char *terminal, int get_enter)
+{
+	int i, j;
+	int fd;
+	pid_t pid;
+	char *tmpCmd, *s;
+	char *cmd[255], *cmdpath;
+	char buf[255];
+	struct stat sb;
+	static const char press_enter[] =
+
+#ifdef CUSTOMIZED_BANNER
+#include CUSTOMIZED_BANNER
+#endif
+
+		"\nPlease press Enter to activate this console. ";
+	char *environment[MAXENV+1] = {
+		termType,
+		"HOME=/",
+		"PATH=/usr/bin:/bin:/usr/sbin:/sbin",
+		"SHELL=" SHELL,
+		"USER=root",
+		NULL
+	};
+
+	/* inherit environment to the child, merging our values -andy */
+	for (i=0; environ[i]; i++) {
+		for (j=0; environment[j]; j++) {
+			s = strchr(environment[j], '=');
+			if (!strncmp(environ[i], environment[j], s - environment[j]))
+				break;
+		}
+		if (!environment[j]) {
+			environment[j++] = environ[i];
+			environment[j] = NULL;
+		}
+	}
+
+	if ((pid = fork()) == 0) {
+		/* Clean up */
+		ioctl(0, TIOCNOTTY, 0);
+		close(0);
+		close(1);
+		close(2);
+		setsid();
+
+		/* Reset signal handlers set for parent process */
+		signal(SIGUSR1, SIG_DFL);
+		signal(SIGUSR2, SIG_DFL);
+		signal(SIGINT, SIG_DFL);
+		signal(SIGTERM, SIG_DFL);
+		signal(SIGHUP, SIG_DFL);
+
+		if ((fd = device_open(terminal, O_RDWR)) < 0) {
+			if (stat(terminal, &sb) != 0) {
+				message(LOG | CONSOLE, "device '%s' does not exist.\n",
+						terminal);
+				exit(1);
+			}
+			message(LOG | CONSOLE, "Bummer, can't open %s\r\n", terminal);
+			exit(1);
+		}
+		dup2(fd, 0);
+		dup2(fd, 1);
+		dup2(fd, 2);
+		ioctl(0, TIOCSCTTY, 1);
+		tcsetpgrp(0, getpgrp());
+		set_term(0);
+
+		/* See if any special /bin/sh requiring characters are present */
+		if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
+			cmd[0] = SHELL;
+			cmd[1] = "-c";
+			strcpy(buf, "exec ");
+			strncat(buf, command, sizeof(buf) - strlen(buf) - 1);
+			cmd[2] = buf;
+			cmd[3] = NULL;
+		} else {
+			/* Convert command (char*) into cmd (char**, one word per string) */
+			for (tmpCmd = command, i = 0;
+					(tmpCmd = strsep(&command, " \t")) != NULL;) {
+				if (*tmpCmd != '\0') {
+					cmd[i] = tmpCmd;
+					tmpCmd++;
+					i++;
+				}
+			}
+			cmd[i] = 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").
+		 */
+
+		if (*cmdpath == '-') {
+
+			/* skip over the dash */
+			++cmdpath;
+
+			/* find the last component in the command pathname */
+			s = get_last_path_component(cmdpath);
+
+			/* make a new argv[0] */
+			if ((cmd[0] = malloc(strlen(s)+2)) == NULL) {
+				message(LOG | CONSOLE, "malloc failed");
+				cmd[0] = cmdpath;
+			} else {
+				cmd[0][0] = '-';
+				strcpy(cmd[0]+1, s);
+			}
+		}
+
+		if (get_enter == TRUE) {
+			/*
+			 * 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.
+			 */
+#ifdef DEBUG_INIT
+			message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
+					cmd[0], getpid(), terminal);
+#endif
+			write(fileno(stdout), press_enter, sizeof(press_enter) - 1);
+			getc(stdin);
+		}
+
+#ifdef DEBUG_INIT
+		/* Log the process name and args */
+		message(LOG, "Starting pid %d, console %s: '%s'\r\n",
+				getpid(), terminal, command);
+#endif
+
+#if defined BB_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);
+		}
+#endif
+
+		/* Now run it.  The new program will take over this PID, 
+		 * so nothing further in init.c should be run. */
+		execve(cmdpath, cmd, environment);
+
+		/* We're still here?  Some error happened. */
+		message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath,
+				strerror(errno));
+		exit(-1);
+	}
+	return pid;
+}
+
+static int waitfor(char *command, char *terminal, int get_enter)
+{
+	int status, wpid;
+	int pid = run(command, terminal, get_enter);
+
+	while (1) {
+		wpid = wait(&status);
+		if (wpid > 0 && wpid != pid) {
+			continue;
+		}
+		if (wpid == pid)
+			break;
+	}
+	return wpid;
+}
+
+/* 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()
+{
+	struct stat statBuf;
+
+	if (check_free_memory() > 1000)
+		return;
+
+	if (stat("/etc/fstab", &statBuf) == 0) {
+		/* swapon -a requires /proc typically */
+		waitfor("mount proc /proc -t proc", console, FALSE);
+		/* Try to turn on swap */
+		waitfor("swapon -a", console, FALSE);
+		if (check_free_memory() < 1000)
+			goto goodnight;
+	} else
+		goto goodnight;
+	return;
+
+  goodnight:
+	message(CONSOLE,
+			"Sorry, your computer does not have enough memory.\r\n");
+	loop_forever();
+}
+
+/* Run all commands to be run right before halt/reboot */
+static void run_actions(initActionEnum action)
+{
+	initAction *a, *tmp;
+	for (a = initActionList; a; a = tmp) {
+		tmp = a->nextPtr;
+		if (a->action == action) {
+			waitfor(a->process, a->console, FALSE);
+			// delete_initAction(a);
+		}
+	}
+}
+
+
+#ifndef DEBUG_INIT
+static void shutdown_system(void)
+{
+
+	/* first disable our SIGHUP signal */
+	signal(SIGHUP, SIG_DFL);
+
+	/* Allow Ctrl-Alt-Del to reboot system. */
+	init_reboot(RB_ENABLE_CAD);
+
+	message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n");
+	sync();
+
+	/* Send signals to every process _except_ pid 1 */
+	message(CONSOLE|LOG, "Sending SIGTERM to all processes.\r\n");
+	kill(-1, SIGTERM);
+	sleep(1);
+	sync();
+
+	message(CONSOLE|LOG, "Sending SIGKILL to all processes.\r\n");
+	kill(-1, SIGKILL);
+	sleep(1);
+
+	/* run everything to be run at "shutdown" */
+	run_actions(SHUTDOWN);
+
+	sync();
+	if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) {
+		/* bdflush, kupdate not needed for kernels >2.2.11 */
+		bdflush(1, 0);
+		sync();
+	}
+}
+
+static void halt_signal(int sig)
+{
+	shutdown_system();
+	message(CONSOLE|LOG,
+			"The system is halted. Press %s or turn off power\r\n",
+			(secondConsole == NULL)	/* serial console */
+			? "Reset" : "CTRL-ALT-DEL");
+	sync();
+
+	/* allow time for last message to reach serial console */
+	sleep(2);
+
+	if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0))
+		init_reboot(RB_POWER_OFF);
+	else
+		init_reboot(RB_HALT_SYSTEM);
+
+	loop_forever();
+}
+
+static void reboot_signal(int sig)
+{
+	shutdown_system();
+	message(CONSOLE|LOG, "Please stand by while rebooting the system.\r\n");
+	sync();
+
+	/* allow time for last message to reach serial console */
+	sleep(2);
+
+	init_reboot(RB_AUTOBOOT);
+
+	loop_forever();
+}
+
+static void ctrlaltdel_signal(int sig)
+{
+	run_actions(CTRLALTDEL);
+}
+
+#endif							/* ! DEBUG_INIT */
+
+static void new_initAction(initActionEnum action, char *process, char *cons)
+{
+	initAction *newAction;
+
+	if (*cons == '\0')
+		cons = console;
+
+	/* If BusyBox detects that a serial console is in use, 
+	 * then entries not refering to the console or null devices will _not_ be run.
+	 * The exception to this rule is the null device.
+	 */
+	if (secondConsole == NULL && strcmp(cons, console)
+		&& strcmp(cons, "/dev/null"))
+		return;
+
+	newAction = calloc((size_t) (1), sizeof(initAction));
+	if (!newAction) {
+		message(LOG | CONSOLE, "Memory allocation failure\n");
+		loop_forever();
+	}
+	newAction->nextPtr = initActionList;
+	initActionList = newAction;
+	strncpy(newAction->process, process, 255);
+	newAction->action = action;
+	strncpy(newAction->console, cons, 255);
+	newAction->pid = 0;
+//    message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n",
+//      newAction->process, newAction->action, newAction->console);
+}
+
+static void delete_initAction(initAction * action)
+{
+	initAction *a, *b = NULL;
+
+	for (a = initActionList; a; b = a, a = a->nextPtr) {
+		if (a == action) {
+			if (b == NULL) {
+				initActionList = a->nextPtr;
+			} else {
+				b->nextPtr = a->nextPtr;
+			}
+			free(a);
+			break;
+		}
+	}
+}
+
+/* NOTE that if BB_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 BB_FEATURE_USE_INITTAB 
+ * _is_ defined, but /etc/inittab is missing, this 
+ * results in the same set of default behaviors.
+ * */
+static void parse_inittab(void)
+{
+#ifdef BB_FEATURE_USE_INITTAB
+	FILE *file;
+	char buf[256], lineAsRead[256], tmpConsole[256];
+	char *id, *runlev, *action, *process, *eol;
+	const struct initActionType *a = actions;
+	int foundIt;
+
+
+	file = fopen(INITTAB, "r");
+	if (file == NULL) {
+		/* No inittab file -- set up some default behavior */
+#endif
+		/* Reboot on Ctrl-Alt-Del */
+		new_initAction(CTRLALTDEL, "/sbin/reboot", console);
+		/* Swapoff on halt/reboot */
+		new_initAction(SHUTDOWN, "/sbin/swapoff -a", console);
+		/* Umount all filesystems on halt/reboot */
+		new_initAction(SHUTDOWN, "/bin/umount -a -r", console);
+		/* Askfirst shell on tty1 */
+		new_initAction(ASKFIRST, LOGIN_SHELL, console);
+		/* Askfirst shell on tty2 */
+		if (secondConsole != NULL)
+			new_initAction(ASKFIRST, LOGIN_SHELL, secondConsole);
+		/* Askfirst shell on tty3 */
+		if (thirdConsole != NULL)
+			new_initAction(ASKFIRST, LOGIN_SHELL, thirdConsole);
+		/* Askfirst shell on tty4 */
+		if (fourthConsole != NULL)
+			new_initAction(ASKFIRST, LOGIN_SHELL, fourthConsole);
+		/* sysinit */
+		new_initAction(SYSINIT, INIT_SCRIPT, console);
+
+		return;
+#ifdef BB_FEATURE_USE_INITTAB
+	}
+
+	while (fgets(buf, 255, file) != NULL) {
+		foundIt = FALSE;
+		/* 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\n", 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\n", lineAsRead);
+			continue;
+		} else {
+			*action = '\0';
+			++action;
+		}
+
+		/* Separate the action from the process */
+		process = strchr(action, ':');
+		if (process == NULL || *(process + 1) == '\0') {
+			message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
+			continue;
+		} else {
+			*process = '\0';
+			++process;
+		}
+
+		/* Ok, now process it */
+		a = actions;
+		while (a->name != 0) {
+			if (strcmp(a->name, action) == 0) {
+				if (*id != '\0') {
+					strcpy(tmpConsole, "/dev/");
+					strncat(tmpConsole, id, 200);
+					id = tmpConsole;
+				}
+				new_initAction(a->action, process, id);
+				foundIt = TRUE;
+			}
+			a++;
+		}
+		if (foundIt == TRUE)
+			continue;
+		else {
+			/* Choke on an unknown action */
+			message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
+		}
+	}
+	return;
+#endif /* BB_FEATURE_USE_INITTAB */
+}
+
+
+
+extern int init_main(int argc, char **argv)
+{
+	initAction *a, *tmp;
+	pid_t wpid;
+	int status;
+
+#ifndef DEBUG_INIT
+	/* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
+	if (getpid() != 1
+#ifdef BB_FEATURE_LINUXRC
+			&& strstr(applet_name, "linuxrc") == NULL
+#endif
+	                  )
+	{
+			show_usage();
+	}
+	/* Set up sig handlers  -- be sure to
+	 * clear all of these in run() */
+	signal(SIGUSR1, halt_signal);
+	signal(SIGUSR2, halt_signal);
+	signal(SIGINT, ctrlaltdel_signal);
+	signal(SIGTERM, reboot_signal);
+
+	/* 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 what kernel this is running */
+	kernelVersion = get_kernel_revision();
+
+	/* Figure out where the default console should be */
+	console_init();
+
+	/* Close whatever files are open, and reset the console. */
+	close(0);
+	close(1);
+	close(2);
+	set_term(0);
+	chdir("/");
+	setsid();
+
+	/* Make sure PATH is set to something sane */
+	putenv("PATH="_PATH_STDPATH);
+
+	/* Hello world */
+#ifndef DEBUG_INIT
+	message(
+#if ! defined BB_FEATURE_EXTRA_QUIET
+			CONSOLE|
+#endif
+			LOG,
+			"init started:  %s\r\n", full_version);
+#else
+	message(
+#if ! defined BB_FEATURE_EXTRA_QUIET
+			CONSOLE|
+#endif
+			LOG,
+			"init(%d) started:  %s\r\n", getpid(), full_version);
+#endif
+
+
+	/* Make sure there is enough memory to do something useful. */
+	check_memory();
+
+	/* 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"))) {
+		/* Ask first then start a shell on tty2-4 */
+		if (secondConsole != NULL)
+			new_initAction(ASKFIRST, LOGIN_SHELL, secondConsole);
+		if (thirdConsole != NULL)
+			new_initAction(ASKFIRST, LOGIN_SHELL, thirdConsole);
+		if (fourthConsole != NULL)
+			new_initAction(ASKFIRST, LOGIN_SHELL, fourthConsole);
+		/* Start a shell on tty1 */
+		new_initAction(RESPAWN, LOGIN_SHELL, console);
+	} else {
+		/* Not in single user mode -- see what inittab says */
+
+		/* NOTE that if BB_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 */
+		parse_inittab();
+	}
+
+	/* Make the command line just say "init"  -- thats all, nothing else */
+	fixup_argv(argc, argv, "init");
+
+	/* Now run everything that needs to be run */
+
+	/* First run the sysinit command */
+	for (a = initActionList; a; a = tmp) {
+		tmp = a->nextPtr;
+		if (a->action == SYSINIT) {
+			waitfor(a->process, a->console, FALSE);
+			/* Now remove the "sysinit" entry from the list */
+			delete_initAction(a);
+		}
+	}
+	/* Next run anything that wants to block */
+	for (a = initActionList; a; a = tmp) {
+		tmp = a->nextPtr;
+		if (a->action == WAIT) {
+			waitfor(a->process, a->console, FALSE);
+			/* Now remove the "wait" entry from the list */
+			delete_initAction(a);
+		}
+	}
+	/* Next run anything to be run only once */
+	for (a = initActionList; a; a = tmp) {
+		tmp = a->nextPtr;
+		if (a->action == ONCE) {
+			run(a->process, a->console, FALSE);
+			/* Now remove the "once" entry from the list */
+			delete_initAction(a);
+		}
+	}
+	/* If there is nothing else to do, stop */
+	if (initActionList == NULL) {
+		message(LOG | CONSOLE,
+				"No more tasks for init -- sleeping forever.\n");
+		loop_forever();
+	}
+
+	/* Now run the looping stuff for the rest of forever */
+	while (1) {
+		for (a = initActionList; a; a = a->nextPtr) {
+			/* Only run stuff with pid==0.  If they have
+			 * a pid, that means they are still running */
+			if (a->pid == 0) {
+				switch (a->action) {
+				case RESPAWN:
+					/* run the respawn stuff */
+					a->pid = run(a->process, a->console, FALSE);
+					break;
+				case ASKFIRST:
+					/* run the askfirst stuff */
+					a->pid = run(a->process, a->console, TRUE);
+					break;
+					/* silence the compiler's incessant whining */
+				default:
+					break;
+				}
+			}
+		}
+		/* Wait for a child process to exit */
+		wpid = wait(&status);
+		if (wpid > 0) {
+			/* Find out who died and clean up their corpse */
+			for (a = initActionList; a; a = a->nextPtr) {
+				if (a->pid == wpid) {
+					a->pid = 0;
+					message(LOG,
+							"Process '%s' (pid %d) exited.  Scheduling it for restart.\n",
+							a->process, wpid);
+				}
+			}
+		}
+		sleep(1);
+	}
+}
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/