From 4aca87515a5083ae0e31ce3177189fd43b6d05ac Mon Sep 17 00:00:00 2001 From: Andreas Baumann Date: Sat, 3 Jan 2015 13:58:15 +0100 Subject: patch to Vanilla Tomato 1.28 --- release/src/router/busybox/logread.c | 144 ----------------------------------- 1 file changed, 144 deletions(-) delete mode 100644 release/src/router/busybox/logread.c (limited to 'release/src/router/busybox/logread.c') diff --git a/release/src/router/busybox/logread.c b/release/src/router/busybox/logread.c deleted file mode 100644 index d3349625..00000000 --- a/release/src/router/busybox/logread.c +++ /dev/null @@ -1,144 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * circular buffer syslog implementation for busybox - * - * Copyright (C) 2000 by Gennady Feldman - * - * Maintainer: Gennady Feldman as of Mar 12, 2001 - * - * 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include "busybox.h" - -#if __GNU_LIBRARY__ < 5 -#error Sorry. Looks like you are using libc5. -#error libc5 shm support isnt good enough. -#error Please disable BB_FEATURE_IPC_SYSLOG -#endif - - -static const long KEY_ID = 0x414e4547; /*"GENA"*/ - -static struct shbuf_ds { - int size; // size of data written - int head; // start of message list - int tail; // end of message list - char data[1]; // data/messages -} *buf = NULL; // shared memory pointer - - -// Semaphore operation structures -static struct sembuf SMrup[1] = {{0, -1, IPC_NOWAIT | SEM_UNDO}}; // set SMrup -static struct sembuf SMrdn[2] = {{1, 0}, {0, +1, SEM_UNDO}}; // set SMrdn - -static int log_shmid = -1; // ipc shared memory id -static int log_semid = -1; // ipc semaphore id -static jmp_buf jmp_env; - -static void error_exit(const char *str); -static void interrupted(int sig); - -/* - * sem_up - up()'s a semaphore. - */ -static inline void sem_up(int semid) -{ - if ( semop(semid, SMrup, 1) == -1 ) - error_exit("semop[SMrup]"); -} - -/* - * sem_down - down()'s a semaphore - */ -static inline void sem_down(int semid) -{ - if ( semop(semid, SMrdn, 2) == -1 ) - error_exit("semop[SMrdn]"); -} - -extern int logread_main(int argc, char **argv) -{ - int i; - - /* no options, no getopt */ - if (argc > 1) - show_usage(); - - // handle intrrupt signal - if (setjmp(jmp_env)) goto output_end; - - // attempt to redefine ^C signal - signal(SIGINT, interrupted); - - if ( (log_shmid = shmget(KEY_ID, 0, 0)) == -1) - error_exit("Can't find circular buffer"); - - // Attach shared memory to our char* - if ( (buf = shmat(log_shmid, NULL, SHM_RDONLY)) == NULL) - error_exit("Can't get access to circular buffer from syslogd"); - - if ( (log_semid = semget(KEY_ID, 0, 0)) == -1) - error_exit("Can't get access to semaphone(s) for circular buffer from syslogd"); - - sem_down(log_semid); - // Read Memory - i=buf->head; - - //printf("head: %i tail: %i size: %i\n",buf->head,buf->tail,buf->size); - if (buf->head == buf->tail) { - printf("\n"); - } - - while ( i != buf->tail) { - printf("%s", buf->data+i); - i+= strlen(buf->data+i) + 1; - if (i >= buf->size ) - i=0; - } - sem_up(log_semid); - -output_end: - if (log_shmid != -1) - shmdt(buf); - - return EXIT_SUCCESS; -} - -static void interrupted(int sig){ - signal(SIGINT, SIG_IGN); - longjmp(jmp_env, 1); -} - -static void error_exit(const char *str){ - perror(str); - //release all acquired resources - if (log_shmid != -1) - shmdt(buf); - - exit(1); -} -- cgit v1.2.3-54-g00ecf