/*
* Mini syslogd implementation for busybox
*
- * Copyright (C) 1999,2000 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Copyright (C) 2000 by Karl M. Hegbloom <karlheg@debian.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.
+ * "circular buffer" Copyright (C) 2001 by Gennady Feldman <gfeldman@gena01.com>
*
- * 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
+ * Maintainer: Gennady Feldman <gfeldman@gena01.com> as of Mar 12, 2001
*
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
-#include "internal.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <netdb.h>
+#include "busybox.h"
#include <paths.h>
-#include <signal.h>
-#include <stdarg.h>
-#include <time.h>
-#include <unistd.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
#include <sys/un.h>
-#include <sys/param.h>
-#include <linux/unistd.h>
-#ifndef socklen_t
-typedef unsigned int socklen_t;
-#endif
+/* SYSLOG_NAMES defined to pull some extra junk from syslog.h: */
+/* prioritynames[] and facilitynames[]. uclibc pulls those in _rwdata_! :( */
-#if __GNU_LIBRARY__ < 5
+#define SYSLOG_NAMES
+#include <sys/syslog.h>
+#include <sys/uio.h>
-#ifndef __alpha__
-# define __NR_klogctl __NR_syslog
-static inline _syscall3(int, klogctl, int, type, char *, b, int, len);
-#else /* __alpha__ */
-#define klogctl syslog
+#if ENABLE_FEATURE_REMOTE_LOG
+#include <netinet/in.h>
#endif
-#else
-# include <sys/klog.h>
+#if ENABLE_FEATURE_IPC_SYSLOG
+#include <sys/ipc.h>
+#include <sys/sem.h>
+#include <sys/shm.h>
+#endif
+
+
+#define DEBUG 0
+
+/* MARK code is not very useful, is bloat, and broken:
+ * can deadlock if alarmed to make MARK while writing to IPC buffer
+ * (semaphores are down but do_mark routine tries to down them again) */
+#undef SYSLOGD_MARK
+
+enum { MAX_READ = 256 };
+
+/* Semaphore operation structures */
+struct shbuf_ds {
+ int32_t size; /* size of data written */
+ int32_t head; /* start of message list */
+ int32_t tail; /* end of message list */
+ char data[1]; /* data/messages */
+};
+
+/* Allows us to have smaller initializer. Ugly. */
+#define GLOBALS \
+ const char *logFilePath; \
+ int logFD; \
+ /* interval between marks in seconds */ \
+ /*int markInterval;*/ \
+ /* level of messages to be logged */ \
+ int logLevel; \
+USE_FEATURE_ROTATE_LOGFILE( \
+ /* max size of file before rotation */ \
+ unsigned logFileSize; \
+ /* number of rotated message files */ \
+ unsigned logFileRotate; \
+ unsigned curFileSize; \
+ smallint isRegular; \
+) \
+USE_FEATURE_REMOTE_LOG( \
+ /* udp socket for remote logging */ \
+ int remoteFD; \
+ len_and_sockaddr* remoteAddr; \
+) \
+USE_FEATURE_IPC_SYSLOG( \
+ int shmid; /* ipc shared memory id */ \
+ int s_semid; /* ipc semaphore id */ \
+ int shm_size; \
+ struct sembuf SMwup[1]; \
+ struct sembuf SMwdn[3]; \
+)
+
+struct init_globals {
+ GLOBALS
+};
+
+struct globals {
+ GLOBALS
+#if ENABLE_FEATURE_IPC_SYSLOG
+ struct shbuf_ds *shbuf;
+#endif
+ time_t last_log_time;
+ /* localhost's name */
+ char localHostName[64];
+
+ /* We recv into recvbuf... */
+ char recvbuf[MAX_READ];
+ /* ...then copy to parsebuf, escaping control chars */
+ /* (can grow x2 max) */
+ char parsebuf[MAX_READ*2];
+ /* ...then sprintf into printbuf, adding timestamp (15 chars),
+ * host (64), fac.prio (20) to the message */
+ /* (growth by: 15 + 64 + 20 + delims = ~110) */
+ char printbuf[MAX_READ*2 + 128];
+};
+
+static const struct init_globals init_data = {
+ .logFilePath = "/var/log/messages",
+ .logFD = -1,
+#ifdef SYSLOGD_MARK
+ .markInterval = 20 * 60,
+#endif
+ .logLevel = 8,
+#if ENABLE_FEATURE_ROTATE_LOGFILE
+ .logFileSize = 200 * 1024,
+ .logFileRotate = 1,
+#endif
+#if ENABLE_FEATURE_REMOTE_LOG
+ .remoteFD = -1,
+#endif
+#if ENABLE_FEATURE_IPC_SYSLOG
+ .shmid = -1,
+ .s_semid = -1,
+ .shm_size = ((CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE)*1024), // default shm size
+ .SMwup = { {1, -1, IPC_NOWAIT} },
+ .SMwdn = { {0, 0}, {1, 0}, {1, +1} },
+#endif
+};
+
+#define G (*ptr_to_globals)
+
+
+/* Options */
+enum {
+ OPTBIT_mark = 0, // -m
+ OPTBIT_nofork, // -n
+ OPTBIT_outfile, // -O
+ OPTBIT_loglevel, // -l
+ OPTBIT_small, // -S
+ USE_FEATURE_ROTATE_LOGFILE(OPTBIT_filesize ,) // -s
+ USE_FEATURE_ROTATE_LOGFILE(OPTBIT_rotatecnt ,) // -b
+ USE_FEATURE_REMOTE_LOG( OPTBIT_remote ,) // -R
+ USE_FEATURE_REMOTE_LOG( OPTBIT_localtoo ,) // -L
+ USE_FEATURE_IPC_SYSLOG( OPTBIT_circularlog,) // -C
+
+ OPT_mark = 1 << OPTBIT_mark ,
+ OPT_nofork = 1 << OPTBIT_nofork ,
+ OPT_outfile = 1 << OPTBIT_outfile ,
+ OPT_loglevel = 1 << OPTBIT_loglevel,
+ OPT_small = 1 << OPTBIT_small ,
+ OPT_filesize = USE_FEATURE_ROTATE_LOGFILE((1 << OPTBIT_filesize )) + 0,
+ OPT_rotatecnt = USE_FEATURE_ROTATE_LOGFILE((1 << OPTBIT_rotatecnt )) + 0,
+ OPT_remotelog = USE_FEATURE_REMOTE_LOG( (1 << OPTBIT_remote )) + 0,
+ OPT_locallog = USE_FEATURE_REMOTE_LOG( (1 << OPTBIT_localtoo )) + 0,
+ OPT_circularlog = USE_FEATURE_IPC_SYSLOG( (1 << OPTBIT_circularlog)) + 0,
+};
+#define OPTION_STR "m:nO:l:S" \
+ USE_FEATURE_ROTATE_LOGFILE("s:" ) \
+ USE_FEATURE_ROTATE_LOGFILE("b:" ) \
+ USE_FEATURE_REMOTE_LOG( "R:" ) \
+ USE_FEATURE_REMOTE_LOG( "L" ) \
+ USE_FEATURE_IPC_SYSLOG( "C::")
+#define OPTION_DECL *opt_m, *opt_l \
+ USE_FEATURE_ROTATE_LOGFILE(,*opt_s) \
+ USE_FEATURE_ROTATE_LOGFILE(,*opt_b) \
+ USE_FEATURE_REMOTE_LOG( ,*opt_R) \
+ USE_FEATURE_IPC_SYSLOG( ,*opt_C = NULL)
+#define OPTION_PARAM &opt_m, &G.logFilePath, &opt_l \
+ USE_FEATURE_ROTATE_LOGFILE(,&opt_s) \
+ USE_FEATURE_ROTATE_LOGFILE(,&opt_b) \
+ USE_FEATURE_REMOTE_LOG( ,&opt_R) \
+ USE_FEATURE_IPC_SYSLOG( ,&opt_C)
+
+
+/* circular buffer variables/structures */
+#if ENABLE_FEATURE_IPC_SYSLOG
+
+#if CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE < 4
+#error Sorry, you must set the syslogd buffer size to at least 4KB.
+#error Please check CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE
#endif
+/* our shared key */
+#define KEY_ID ((long)0x414e4547) /* "GENA" */
+static void ipcsyslog_cleanup(void)
+{
+ if (G.shmid != -1) {
+ shmdt(G.shbuf);
+ }
+ if (G.shmid != -1) {
+ shmctl(G.shmid, IPC_RMID, NULL);
+ }
+ if (G.s_semid != -1) {
+ semctl(G.s_semid, 0, IPC_RMID, 0);
+ }
+}
-/* SYSLOG_NAMES defined to pull some extra junk from syslog.h */
-#define SYSLOG_NAMES
-#include <sys/syslog.h>
+static void ipcsyslog_init(void)
+{
+ if (DEBUG)
+ printf("shmget(%lx, %d,...)\n", KEY_ID, G.shm_size);
-/* Path for the file where all log messages are written */
-#define __LOG_FILE "/var/log/messages"
+ G.shmid = shmget(KEY_ID, G.shm_size, IPC_CREAT | 1023);
+ if (G.shmid == -1) {
+ bb_perror_msg_and_die("shmget");
+ }
-/* Path to the unix socket */
-char lfile[BUFSIZ] = "";
+ G.shbuf = shmat(G.shmid, NULL, 0);
+ if (!G.shbuf) {
+ bb_perror_msg_and_die("shmat");
+ }
-static char *logFilePath = __LOG_FILE;
+ G.shbuf->size = G.shm_size - offsetof(struct shbuf_ds, data);
+ G.shbuf->head = G.shbuf->tail = 0;
-/* interval between marks in seconds */
-static int MarkInterval = 20 * 60;
+ // we'll trust the OS to set initial semval to 0 (let's hope)
+ G.s_semid = semget(KEY_ID, 2, IPC_CREAT | IPC_EXCL | 1023);
+ if (G.s_semid == -1) {
+ if (errno == EEXIST) {
+ G.s_semid = semget(KEY_ID, 2, 0);
+ if (G.s_semid != -1)
+ return;
+ }
+ bb_perror_msg_and_die("semget");
+ }
+}
-/* localhost's name */
-static char LocalHostName[32];
+/* Write message to shared mem buffer */
+static void log_to_shmem(const char *msg, int len)
+{
+ int old_tail, new_tail;
+ char *c;
+
+ if (semop(G.s_semid, G.SMwdn, 3) == -1) {
+ bb_perror_msg_and_die("SMwdn");
+ }
+
+ /* Circular Buffer Algorithm:
+ * --------------------------
+ * tail == position where to store next syslog message.
+ * head == position of next message to retrieve ("print").
+ * if head == tail, there is no "unprinted" messages left.
+ * head is typically advanced by separate "reader" program,
+ * but if there isn't one, we have to do it ourself.
+ * messages are NUL-separated.
+ */
+ len++; /* length with NUL included */
+ again:
+ old_tail = G.shbuf->tail;
+ new_tail = old_tail + len;
+ if (new_tail < G.shbuf->size) {
+ /* No need to move head if shbuf->head <= old_tail,
+ * else... */
+ if (old_tail < G.shbuf->head && G.shbuf->head <= new_tail) {
+ /* ...need to move head forward */
+ c = memchr(G.shbuf->data + new_tail, '\0',
+ G.shbuf->size - new_tail);
+ if (!c) /* no NUL ahead of us, wrap around */
+ c = memchr(G.shbuf->data, '\0', old_tail);
+ if (!c) { /* still nothing? point to this msg... */
+ G.shbuf->head = old_tail;
+ } else {
+ /* convert pointer to offset + skip NUL */
+ G.shbuf->head = c - G.shbuf->data + 1;
+ }
+ }
+ /* store message, set new tail */
+ memcpy(G.shbuf->data + old_tail, msg, len);
+ G.shbuf->tail = new_tail;
+ } else {
+ /* we need to break up the message and wrap it around */
+ /* k == available buffer space ahead of old tail */
+ int k = G.shbuf->size - old_tail - 1;
+ if (G.shbuf->head > old_tail) {
+ /* we are going to overwrite head, need to
+ * move it out of the way */
+ c = memchr(G.shbuf->data, '\0', old_tail);
+ if (!c) { /* nothing? point to this msg... */
+ G.shbuf->head = old_tail;
+ } else { /* convert pointer to offset + skip NUL */
+ G.shbuf->head = c - G.shbuf->data + 1;
+ }
+ }
+ /* copy what fits to the end of buffer, and repeat */
+ memcpy(G.shbuf->data + old_tail, msg, k);
+ msg += k;
+ len -= k;
+ G.shbuf->tail = 0;
+ goto again;
+ }
+ if (semop(G.s_semid, G.SMwup, 1) == -1) {
+ bb_perror_msg_and_die("SMwup");
+ }
+ if (DEBUG)
+ printf("head:%d tail:%d\n", G.shbuf->head, G.shbuf->tail);
+}
+#else
+void ipcsyslog_cleanup(void);
+void ipcsyslog_init(void);
+void log_to_shmem(const char *msg);
+#endif /* FEATURE_IPC_SYSLOG */
-static const char syslogd_usage[] =
- "syslogd [OPTION]...\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
- "\nLinux system and kernel (provides klogd) logging utility.\n"
- "Note that this version of syslogd/klogd ignores /etc/syslog.conf.\n\n"
- "Options:\n"
- "\t-m NUM\t\tInterval between MARK lines (default=20min, 0=off)\n"
- "\t-n\t\tRun as a foreground process\n"
-#ifdef BB_KLOGD
- "\t-K\t\tDo not start up the klogd process\n"
-#endif
- "\t-O FILE\t\tUse an alternate log file (default=/var/log/messages)\n"
-#endif
- ;
-/* Note: There is also a function called "message()" in init.c */
/* Print a message to the log file. */
-static void message (char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
-static void message (char *fmt, ...)
+static void log_locally(char *msg)
{
- int fd;
struct flock fl;
- va_list arguments;
+ int len = strlen(msg);
- fl.l_whence = SEEK_SET;
- fl.l_start = 0;
- fl.l_len = 1;
-
- if ((fd = device_open (logFilePath,
- O_WRONLY | O_CREAT | O_NOCTTY | O_APPEND |
- O_NONBLOCK)) >= 0) {
- fl.l_type = F_WRLCK;
- fcntl (fd, F_SETLKW, &fl);
- va_start (arguments, fmt);
- vdprintf (fd, fmt, arguments);
- va_end (arguments);
- fl.l_type = F_UNLCK;
- fcntl (fd, F_SETLKW, &fl);
- close (fd);
+#if ENABLE_FEATURE_IPC_SYSLOG
+ if ((option_mask32 & OPT_circularlog) && G.shbuf) {
+ log_to_shmem(msg, len);
+ return;
+ }
+#endif
+ if (G.logFD >= 0) {
+ time_t cur;
+ time(&cur);
+ if (G.last_log_time != cur) {
+ G.last_log_time = cur; /* reopen log file every second */
+ close(G.logFD);
+ goto reopen;
+ }
} else {
- /* Always send console messages to /dev/console so people will see them. */
- if ((fd = device_open (_PATH_CONSOLE,
- O_WRONLY | O_NOCTTY | O_NONBLOCK)) >= 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);
- fflush (stderr);
- va_end (arguments);
+ reopen:
+ G.logFD = device_open(G.logFilePath, O_WRONLY | O_CREAT
+ | O_NOCTTY | O_APPEND | O_NONBLOCK);
+ if (G.logFD < 0) {
+ /* cannot open logfile? - print to /dev/console then */
+ int fd = device_open(_PATH_CONSOLE, O_WRONLY | O_NOCTTY | O_NONBLOCK);
+ if (fd < 0)
+ fd = 2; /* then stderr, dammit */
+ full_write(fd, msg, len);
+ if (fd != 2)
+ close(fd);
+ return;
+ }
+#if ENABLE_FEATURE_ROTATE_LOGFILE
+ {
+ struct stat statf;
+
+ G.isRegular = (fstat(G.logFD, &statf) == 0 && (statf.st_mode & S_IFREG));
+ /* bug (mostly harmless): can wrap around if file > 4gb */
+ G.curFileSize = statf.st_size;
+ }
+#endif
+ }
+
+ fl.l_whence = SEEK_SET;
+ fl.l_start = 0;
+ fl.l_len = 1;
+ fl.l_type = F_WRLCK;
+ fcntl(G.logFD, F_SETLKW, &fl);
+
+#if ENABLE_FEATURE_ROTATE_LOGFILE
+ if (G.logFileSize && G.isRegular && G.curFileSize > G.logFileSize) {
+ if (G.logFileRotate) { /* always 0..99 */
+ int i = strlen(G.logFilePath) + 3 + 1;
+ char oldFile[i];
+ char newFile[i];
+ i = G.logFileRotate - 1;
+ /* rename: f.8 -> f.9; f.7 -> f.8; ... */
+ while (1) {
+ sprintf(newFile, "%s.%d", G.logFilePath, i);
+ if (i == 0) break;
+ sprintf(oldFile, "%s.%d", G.logFilePath, --i);
+ rename(oldFile, newFile);
+ }
+ /* newFile == "f.0" now */
+ rename(G.logFilePath, newFile);
+ fl.l_type = F_UNLCK;
+ fcntl(G.logFD, F_SETLKW, &fl);
+ close(G.logFD);
+ goto reopen;
}
+ ftruncate(G.logFD, 0);
}
+ G.curFileSize +=
+#endif
+ full_write(G.logFD, msg, len);
+ fl.l_type = F_UNLCK;
+ fcntl(G.logFD, F_SETLKW, &fl);
}
-static void logMessage (int pri, char *msg)
+static void parse_fac_prio_20(int pri, char *res20)
{
- time_t now;
- char *timestamp;
- static char res[20] = "";
CODE *c_pri, *c_fac;
if (pri != 0) {
- for (c_fac = facilitynames;
- c_fac->c_name && !(c_fac->c_val == LOG_FAC(pri) << 3); c_fac++);
- for (c_pri = prioritynames;
- c_pri->c_name && !(c_pri->c_val == LOG_PRI(pri)); c_pri++);
- if (*c_fac->c_name == '\0' || *c_pri->c_name == '\0')
- snprintf(res, sizeof(res), "<%d>", pri);
- else
- snprintf(res, sizeof(res), "%s.%s", c_fac->c_name, c_pri->c_name);
+ c_fac = facilitynames;
+ while (c_fac->c_name) {
+ if (c_fac->c_val != (LOG_FAC(pri) << 3)) {
+ c_fac++; continue;
+ }
+ /* facility is found, look for prio */
+ c_pri = prioritynames;
+ while (c_pri->c_name) {
+ if (c_pri->c_val != LOG_PRI(pri)) {
+ c_pri++; continue;
+ }
+ snprintf(res20, 20, "%s.%s",
+ c_fac->c_name, c_pri->c_name);
+ return;
+ }
+ /* prio not found, bail out */
+ break;
+ }
+ snprintf(res20, 20, "<%d>", pri);
}
+}
- if (strlen(msg) < 16 || msg[3] != ' ' || msg[6] != ' ' ||
- msg[9] != ':' || msg[12] != ':' || msg[15] != ' ') {
+/* len parameter is used only for "is there a timestamp?" check.
+ * NB: some callers cheat and supply 0 when they know
+ * that there is no timestamp, short-cutting the test. */
+static void timestamp_and_log(int pri, char *msg, int len)
+{
+ char *timestamp;
+
+ if (len < 16 || msg[3] != ' ' || msg[6] != ' '
+ || msg[9] != ':' || msg[12] != ':' || msg[15] != ' '
+ ) {
+ time_t now;
time(&now);
timestamp = ctime(&now) + 4;
- timestamp[15] = '\0';
} else {
timestamp = msg;
- timestamp[15] = '\0';
msg += 16;
}
-
- /* todo: supress duplicates */
-
- /* now spew out the message to wherever it is supposed to go */
- message("%s %s %s %s\n", timestamp, LocalHostName, res, msg);
-}
-
-static void quit_signal(int sig)
-{
- logMessage(0, "System log daemon exiting.");
- unlink(lfile);
- exit(TRUE);
-}
-
-static void domark(int sig)
-{
- if (MarkInterval > 0) {
- logMessage(LOG_SYSLOG | LOG_INFO, "-- MARK --");
- alarm(MarkInterval);
+ timestamp[15] = '\0';
+
+ /* Log message locally (to file or shared mem) */
+ if (!ENABLE_FEATURE_REMOTE_LOG || (option_mask32 & OPT_locallog)) {
+ if (LOG_PRI(pri) < G.logLevel) {
+ if (option_mask32 & OPT_small)
+ sprintf(G.printbuf, "%s %s\n", timestamp, msg);
+ else {
+ char res[20];
+ parse_fac_prio_20(pri, res);
+ sprintf(G.printbuf, "%s %s %s %s\n", timestamp, G.localHostName, res, msg);
+ }
+ log_locally(G.printbuf);
+ }
}
}
-#define BUFSIZE 1023
-static int serveConnection (int conn)
+static void split_escape_and_log(char *tmpbuf, int len)
{
- char buf[ BUFSIZE + 1 ];
- int n_read;
-
- while ((n_read = read (conn, buf, BUFSIZE )) > 0) {
-
- int pri = (LOG_USER | LOG_NOTICE);
- char line[ BUFSIZE + 1 ];
- unsigned char c;
-
- char *p = buf, *q = line;
-
- buf[ n_read - 1 ] = '\0';
+ char *p = tmpbuf;
+
+ tmpbuf += len;
+ while (p < tmpbuf) {
+ char c;
+ char *q = G.parsebuf;
+ int pri = (LOG_USER | LOG_NOTICE);
+
+ if (*p == '<') {
+ /* Parse the magic priority number */
+ pri = bb_strtou(p + 1, &p, 10);
+ if (*p == '>') p++;
+ if (pri & ~(LOG_FACMASK | LOG_PRIMASK)) {
+ pri = (LOG_USER | LOG_NOTICE);
+ }
+ }
- while (p && (c = *p) && q < &line[ sizeof (line) - 1 ]) {
- if (c == '<') {
- /* Parse the magic priority number. */
- pri = 0;
- while (isdigit (*(++p))) {
- pri = 10 * pri + (*p - '0');
- }
- if (pri & ~(LOG_FACMASK | LOG_PRIMASK))
- pri = (LOG_USER | LOG_NOTICE);
- } else if (c == '\n') {
- *q++ = ' ';
- } else if (iscntrl (c) && (c < 0177)) {
+ while ((c = *p++)) {
+ if (c == '\n')
+ c = ' ';
+ if (!(c & ~0x1f)) {
*q++ = '^';
- *q++ = c ^ 0100;
- } else {
- *q++ = c;
+ c += '@'; /* ^@, ^A, ^B... */
}
- p++;
+ *q++ = c;
}
*q = '\0';
/* Now log it */
- logMessage (pri, line);
+ timestamp_and_log(pri, G.parsebuf, q - G.parsebuf);
}
- return (0);
}
-static void doSyslogd (void) __attribute__ ((noreturn));
-static void doSyslogd (void)
+static void quit_signal(int sig)
{
- struct sockaddr_un sunx;
- socklen_t addrLength;
+ timestamp_and_log(LOG_SYSLOG | LOG_INFO, (char*)"syslogd exiting", 0);
+ puts("syslogd exiting");
+ if (ENABLE_FEATURE_IPC_SYSLOG)
+ ipcsyslog_cleanup();
+ exit(1);
+}
+#ifdef SYSLOGD_MARK
+static void do_mark(int sig)
+{
+ if (G.markInterval) {
+ timestamp_and_log(LOG_SYSLOG | LOG_INFO, (char*)"-- MARK --", 0);
+ alarm(G.markInterval);
+ }
+}
+#endif
+static void do_syslogd(void) ATTRIBUTE_NORETURN;
+static void do_syslogd(void)
+{
+ struct sockaddr_un sunx;
int sock_fd;
fd_set fds;
+ char *dev_log_name;
- char lfile[BUFSIZ];
-
- /* Set up signal handlers. */
- signal (SIGINT, quit_signal);
- signal (SIGTERM, quit_signal);
- signal (SIGQUIT, quit_signal);
- signal (SIGHUP, SIG_IGN);
- signal (SIGCLD, SIG_IGN);
- signal (SIGALRM, domark);
- alarm (MarkInterval);
-
- /* Create the syslog file so realpath() can work. */
- close (open (_PATH_LOG, O_RDWR | O_CREAT, 0644));
- if (realpath (_PATH_LOG, lfile) == NULL)
- fatalError ("Could not resolv path to " _PATH_LOG ": %s\n", strerror (errno));
-
- unlink (lfile);
+ /* Set up signal handlers */
+ signal(SIGINT, quit_signal);
+ signal(SIGTERM, quit_signal);
+ signal(SIGQUIT, quit_signal);
+ signal(SIGHUP, SIG_IGN);
+ signal(SIGCHLD, SIG_IGN);
+#ifdef SIGCLD
+ signal(SIGCLD, SIG_IGN);
+#endif
+#ifdef SYSLOGD_MARK
+ signal(SIGALRM, do_mark);
+ alarm(G.markInterval);
+#endif
+ remove_pidfile("/var/run/syslogd.pid");
- memset (&sunx, 0, sizeof (sunx));
+ memset(&sunx, 0, sizeof(sunx));
sunx.sun_family = AF_UNIX;
- strncpy (sunx.sun_path, lfile, sizeof (sunx.sun_path));
- if ((sock_fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
- fatalError ("Couldn't obtain descriptor for socket " _PATH_LOG ": %s\n", strerror (errno));
-
- addrLength = sizeof (sunx.sun_family) + strlen (sunx.sun_path);
- if ((bind (sock_fd, (struct sockaddr *) &sunx, addrLength)) || (listen (sock_fd, 5)))
- fatalError ("Could not connect to socket " _PATH_LOG ": %s\n", strerror (errno));
-
- if (chmod (lfile, 0666) < 0)
- fatalError ("Could not set permission on " _PATH_LOG ": %s\n", strerror (errno));
-
- FD_ZERO (&fds);
- FD_SET (sock_fd, &fds);
-
- logMessage (0, "syslogd started: BusyBox v" BB_VER " (" BB_BT ")");
-
- for (;;) {
-
- fd_set readfds;
- int n_ready;
- int fd;
-
- memcpy (&readfds, &fds, sizeof (fds));
-
- if ((n_ready = select (FD_SETSIZE, &readfds, NULL, NULL, NULL)) < 0) {
- if (errno == EINTR) continue; /* alarm may have happened. */
- fatalError ("select error: %s\n", strerror (errno));
- }
-
- for (fd = 0; (n_ready > 0) && (fd < FD_SETSIZE); fd++) {
- if (FD_ISSET (fd, &readfds)) {
-
- --n_ready;
-
- if (fd == sock_fd) {
-
- int conn;
- pid_t pid;
-
- if ((conn = accept (sock_fd, (struct sockaddr *) &sunx, &addrLength)) < 0) {
- fatalError ("accept error: %s\n", strerror (errno));
- }
-
- pid = fork();
-
- if (pid < 0) {
- perror ("syslogd: fork");
- close (conn);
- continue;
- }
-
- if (pid == 0)
- serveConnection (conn);
- close (conn);
- }
- }
- }
+ strcpy(sunx.sun_path, "/dev/log");
+
+ /* Unlink old /dev/log or object it points to. */
+ /* (if it exists, bind will fail) */
+ logmode = LOGMODE_NONE;
+ dev_log_name = xmalloc_readlink_or_warn("/dev/log");
+ logmode = LOGMODE_STDIO;
+ if (dev_log_name) {
+ int fd = xopen(".", O_NONBLOCK);
+ xchdir("/dev");
+ /* we do not check whether this is a link also */
+ unlink(dev_log_name);
+ fchdir(fd);
+ close(fd);
+ safe_strncpy(sunx.sun_path, dev_log_name, sizeof(sunx.sun_path));
+ free(dev_log_name);
+ } else {
+ unlink("/dev/log");
}
-}
-#ifdef BB_KLOGD
+ sock_fd = xsocket(AF_UNIX, SOCK_DGRAM, 0);
+ xbind(sock_fd, (struct sockaddr *) &sunx, sizeof(sunx));
-static void klogd_signal(int sig)
-{
- klogctl(7, NULL, 0);
- klogctl(0, 0, 0);
- logMessage(0, "Kernel log daemon exiting.");
- exit(TRUE);
-}
-
-static void doKlogd (void) __attribute__ ((noreturn));
-static void doKlogd (void)
-{
- int priority = LOG_INFO;
- char log_buffer[4096];
- char *logp;
-
- /* Set up sig handlers */
- signal(SIGINT, klogd_signal);
- signal(SIGKILL, klogd_signal);
- signal(SIGTERM, klogd_signal);
- signal(SIGHUP, SIG_IGN);
- logMessage(0, "klogd started: "
- "BusyBox v" BB_VER " (" BB_BT ")");
+ if (chmod("/dev/log", 0666) < 0) {
+ bb_perror_msg_and_die("cannot set permission on /dev/log");
+ }
+ if (ENABLE_FEATURE_IPC_SYSLOG && (option_mask32 & OPT_circularlog)) {
+ ipcsyslog_init();
+ }
- klogctl(1, NULL, 0);
+ timestamp_and_log(LOG_SYSLOG | LOG_INFO,
+ (char*)"syslogd started: BusyBox v" BB_VER, 0);
- while (1) {
- /* Use kernel syscalls */
- memset(log_buffer, '\0', sizeof(log_buffer));
- if (klogctl(2, log_buffer, sizeof(log_buffer)) < 0) {
- char message[80];
+ for (;;) {
+ FD_ZERO(&fds);
+ FD_SET(sock_fd, &fds);
- if (errno == EINTR)
+ if (select(sock_fd + 1, &fds, NULL, NULL, NULL) < 0) {
+ if (errno == EINTR) {
+ /* alarm may have happened */
continue;
- snprintf(message, 79, "klogd: Error return from sys_sycall: " \
- "%d - %s.\n", errno, strerror(errno));
- logMessage(LOG_SYSLOG | LOG_ERR, message);
- exit(1);
- }
- logp = log_buffer;
- if (*log_buffer == '<') {
- switch (*(log_buffer + 1)) {
- case '0':
- priority = LOG_EMERG;
- break;
- case '1':
- priority = LOG_ALERT;
- break;
- case '2':
- priority = LOG_CRIT;
- break;
- case '3':
- priority = LOG_ERR;
- break;
- case '4':
- priority = LOG_WARNING;
- break;
- case '5':
- priority = LOG_NOTICE;
- break;
- case '6':
- priority = LOG_INFO;
- break;
- case '7':
- default:
- priority = LOG_DEBUG;
}
- logp += 3;
+ bb_perror_msg_and_die("select");
}
- logMessage(LOG_KERN | priority, logp);
- }
-
-}
+ if (FD_ISSET(sock_fd, &fds)) {
+ int i;
+ i = recv(sock_fd, G.recvbuf, MAX_READ - 1, 0);
+ if (i <= 0)
+ bb_perror_msg_and_die("UNIX socket error");
+ /* TODO: maybe suppress duplicates? */
+#if ENABLE_FEATURE_REMOTE_LOG
+ /* We are not modifying log messages in any way before send */
+ /* Remote site cannot trust _us_ anyway and need to do validation again */
+ if (G.remoteAddr) {
+ if (-1 == G.remoteFD) {
+ G.remoteFD = socket(G.remoteAddr->sa.sa_family, SOCK_DGRAM, 0);
+ }
+ if (-1 != G.remoteFD) {
+ /* send message to remote logger, ignore possible error */
+ sendto(G.remoteFD, G.recvbuf, i, MSG_DONTWAIT,
+ &G.remoteAddr->sa, G.remoteAddr->len);
+ }
+ }
#endif
-
-static void daemon_init (char **argv, char *dz, void fn (void))
-{
- setsid();
- chdir ("/");
- strncpy(argv[0], dz, strlen(argv[0]));
- fn();
- exit(0);
+ G.recvbuf[i] = '\0';
+ split_escape_and_log(G.recvbuf, i);
+ } /* FD_ISSET() */
+ } /* for */
}
-extern int syslogd_main(int argc, char **argv)
+int syslogd_main(int argc, char **argv);
+int syslogd_main(int argc, char **argv)
{
- int pid, klogd_pid;
- int doFork = TRUE;
+ char OPTION_DECL;
+ char *p;
+
+ PTR_TO_GLOBALS = memcpy(xzalloc(sizeof(G)), &init_data, sizeof(init_data));
-#ifdef BB_KLOGD
- int startKlogd = TRUE;
+ /* do normal option parsing */
+ opt_complementary = "=0"; /* no non-option params */
+ getopt32(argc, argv, OPTION_STR, OPTION_PARAM);
+#ifdef SYSLOGD_MARK
+ if (option_mask32 & OPT_mark) // -m
+ G.markInterval = xatou_range(opt_m, 0, INT_MAX/60) * 60;
#endif
- int stopDoingThat = FALSE;
- char *p;
- char **argv1 = argv;
-
- while (--argc > 0 && **(++argv1) == '-') {
- stopDoingThat = FALSE;
- while (stopDoingThat == FALSE && *(++(*argv1))) {
- switch (**argv1) {
- case 'm':
- if (--argc == 0) {
- usage(syslogd_usage);
- }
- MarkInterval = atoi(*(++argv1)) * 60;
- break;
- case 'n':
- doFork = FALSE;
- break;
-#ifdef BB_KLOGD
- case 'K':
- startKlogd = FALSE;
- break;
+ //if (option_mask32 & OPT_nofork) // -n
+ //if (option_mask32 & OPT_outfile) // -O
+ if (option_mask32 & OPT_loglevel) // -l
+ G.logLevel = xatou_range(opt_l, 1, 8);
+ //if (option_mask32 & OPT_small) // -S
+#if ENABLE_FEATURE_ROTATE_LOGFILE
+ if (option_mask32 & OPT_filesize) // -s
+ G.logFileSize = xatou_range(opt_s, 0, INT_MAX/1024) * 1024;
+ if (option_mask32 & OPT_rotatecnt) // -b
+ G.logFileRotate = xatou_range(opt_b, 0, 99);
#endif
- case 'O':
- if (--argc == 0) {
- usage(syslogd_usage);
- }
- logFilePath = *(++argv1);
- stopDoingThat = TRUE;
- break;
- default:
- usage(syslogd_usage);
- }
- }
+#if ENABLE_FEATURE_REMOTE_LOG
+ if (option_mask32 & OPT_remotelog) { // -R
+ G.remoteAddr = xhost2sockaddr(opt_R, 514);
}
+ //if (option_mask32 & OPT_locallog) // -L
+#endif
+#if ENABLE_FEATURE_IPC_SYSLOG
+ if (opt_C) // -Cn
+ G.shm_size = xatoul_range(opt_C, 4, INT_MAX/1024) * 1024;
+#endif
- if (argc > 0)
- usage(syslogd_usage);
+ /* If they have not specified remote logging, then log locally */
+ if (ENABLE_FEATURE_REMOTE_LOG && !(option_mask32 & OPT_remotelog))
+ option_mask32 |= OPT_locallog;
/* Store away localhost's name before the fork */
- gethostname(LocalHostName, sizeof(LocalHostName));
- if ((p = strchr(LocalHostName, '.'))) {
- *p++ = '\0';
+ gethostname(G.localHostName, sizeof(G.localHostName));
+ p = strchr(G.localHostName, '.');
+ if (p) {
+ *p = '\0';
}
- umask(0);
-
-#ifdef BB_KLOGD
- /* Start up the klogd process */
- if (startKlogd == TRUE) {
- klogd_pid = fork();
- if (klogd_pid == 0) {
- daemon_init (argv, "klogd", doKlogd);
- }
+ if (!(option_mask32 & OPT_nofork)) {
+ bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv);
}
-#endif
-
- if (doFork == TRUE) {
- pid = fork();
- if (pid < 0)
- exit(pid);
- else if (pid == 0) {
- daemon_init (argv, "syslogd", doSyslogd);
- }
- } else {
- doSyslogd();
- }
-
- return(TRUE);
+ umask(0);
+ write_pidfile("/var/run/syslogd.pid");
+ do_syslogd();
+ /* return EXIT_SUCCESS; */
}
-
-/*
-Local Variables
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
projects / oweals / busybox.git / blobdiff