+/* vi: set sw=4 ts=4: */
/*
* Mini syslogd implementation for busybox
*
- * Copyright (C) 1999 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
+ * Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
+ *
+ * Copyright (C) 2000 by Karl M. Hegbloom <karlheg@debian.org>
+ *
+ * "circular buffer" Copyright (C) 2001 by Gennady Feldman <gfeldman@cachier.com>
+ *
+ * Maintainer: Gennady Feldman <gena01@cachier.com> 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
*
*/
-#include "internal.h"
#include <stdio.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <unistd.h>
-#include <time.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <signal.h>
+#include <stdlib.h>
#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
#include <netdb.h>
+#include <paths.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <time.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/un.h>
+#include <sys/param.h>
+#include "busybox.h"
/* SYSLOG_NAMES defined to pull some extra junk from syslog.h */
#define SYSLOG_NAMES
#include <sys/syslog.h>
+#include <sys/uio.h>
/* Path for the file where all log messages are written */
-#define __LOG_FILE "/var/log/messages"
-/* Path to the current console device */
-#define __DEV_CONSOLE "/dev/console"
+#define __LOG_FILE "/var/log/messages"
+
+/* Path to the unix socket */
+static char lfile[MAXPATHLEN];
+static char *logFilePath = __LOG_FILE;
-static char* logFilePath = __LOG_FILE;
/* interval between marks in seconds */
-static int MarkInterval = 20*60;
+static int MarkInterval = 20 * 60;
+
/* localhost's name */
-static char LocalHostName[32];
+static char LocalHostName[64];
+
+#ifdef CONFIG_FEATURE_REMOTE_LOG
+#include <netinet/in.h>
+/* udp socket for logging to remote host */
+static int remotefd = -1;
+/* where do we log? */
+static char *RemoteHost;
+/* what port to log to? */
+static int RemotePort = 514;
+/* To remote log or not to remote log, that is the question. */
+static int doRemoteLog = FALSE;
+static int local_logging = FALSE;
+#endif
+
+
+#define MAXLINE 1024 /* maximum line length */
+
+
+/* circular buffer variables/structures */
+#ifdef CONFIG_FEATURE_IPC_SYSLOG
+#if __GNU_LIBRARY__ < 5
+#error Sorry. Looks like you are using libc5.
+#error libc5 shm support isnt good enough.
+#error Please disable CONFIG_FEATURE_IPC_SYSLOG
+#endif
+
+#include <sys/ipc.h>
+#include <sys/sem.h>
+#include <sys/shm.h>
+
+/* our shared key */
+static const long KEY_ID = 0x414e4547; /*"GENA"*/
+
+// Semaphore operation structures
+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
+
+static struct sembuf SMwup[1] = {{1, -1, IPC_NOWAIT}}; // set SMwup
+static struct sembuf SMwdn[3] = {{0, 0}, {1, 0}, {1, +1}}; // set SMwdn
+
+static int shmid = -1; // ipc shared memory id
+static int s_semid = -1; // ipc semaphore id
+int data_size = 16000; // data size
+int shm_size = 16000 + sizeof(*buf); // our buffer size
+static int circular_logging = FALSE;
-static const char syslogd_usage[] =
- "syslogd [OPTION]...\n\n"
- "Linux system logging utility.\n\n"
- "Options:\n"
- "\t-m\tChange the mark timestamp interval. default=20min. 0=off\n"
- "\t-n\tDo not fork into the background (for when run by init)\n"
- "\t-O\tSpecify an alternate log file. default=/var/log/messages\n";
+/*
+ * sem_up - up()'s a semaphore.
+ */
+static inline void sem_up(int semid)
+{
+ if ( semop(semid, SMwup, 1) == -1 )
+ perror_msg_and_die("semop[SMwup]");
+}
+/*
+ * sem_down - down()'s a semaphore
+ */
+static inline void sem_down(int semid)
+{
+ if ( semop(semid, SMwdn, 3) == -1 )
+ perror_msg_and_die("semop[SMwdn]");
+}
-/* try to open up the specified device */
-static int device_open(char *device, int mode)
-{
- int m, f, fd = -1;
-
- m = mode | O_NONBLOCK;
-
- /* Retry up to 5 times */
- for (f = 0; f < 5; f++)
- if ((fd = open(device, m)) >= 0)
- break;
- if (fd < 0)
- return fd;
- /* Reset original flags. */
- if (m != mode)
- fcntl(fd, F_SETFL, mode);
- return fd;
+void ipcsyslog_cleanup(void){
+ printf("Exiting Syslogd!\n");
+ if (shmid != -1)
+ shmdt(buf);
+
+ if (shmid != -1)
+ shmctl(shmid, IPC_RMID, NULL);
+ if (s_semid != -1)
+ semctl(s_semid, 0, IPC_RMID, 0);
}
-/* print a message to the log file */
-static void message(char *fmt, ...)
+void ipcsyslog_init(void){
+ if (buf == NULL){
+ if ((shmid = shmget(KEY_ID, shm_size, IPC_CREAT | 1023)) == -1)
+ perror_msg_and_die("shmget");
+
+
+ if ((buf = shmat(shmid, NULL, 0)) == NULL)
+ perror_msg_and_die("shmat");
+
+
+ buf->size=data_size;
+ buf->head=buf->tail=0;
+
+ // we'll trust the OS to set initial semval to 0 (let's hope)
+ if ((s_semid = semget(KEY_ID, 2, IPC_CREAT | IPC_EXCL | 1023)) == -1){
+ if (errno == EEXIST){
+ if ((s_semid = semget(KEY_ID, 2, 0)) == -1)
+ perror_msg_and_die("semget");
+ }else
+ perror_msg_and_die("semget");
+ }
+ }else{
+ printf("Buffer already allocated just grab the semaphore?");
+ }
+}
+
+/* write message to buffer */
+void circ_message(const char *msg){
+ int l=strlen(msg)+1; /* count the whole message w/ '\0' included */
+
+ sem_down(s_semid);
+
+ /*
+ * Circular Buffer Algorithm:
+ * --------------------------
+ *
+ * Start-off w/ empty buffer of specific size SHM_SIZ
+ * Start filling it up w/ messages. I use '\0' as separator to break up messages.
+ * This is also very handy since we can do printf on message.
+ *
+ * Once the buffer is full we need to get rid of the first message in buffer and
+ * insert the new message. (Note: if the message being added is >1 message then
+ * we will need to "remove" >1 old message from the buffer). The way this is done
+ * is the following:
+ * When we reach the end of the buffer we set a mark and start from the beginning.
+ * Now what about the beginning and end of the buffer? Well we have the "head"
+ * index/pointer which is the starting point for the messages and we have "tail"
+ * index/pointer which is the ending point for the messages. When we "display" the
+ * messages we start from the beginning and continue until we reach "tail". If we
+ * reach end of buffer, then we just start from the beginning (offset 0). "head" and
+ * "tail" are actually offsets from the beginning of the buffer.
+ *
+ * Note: This algorithm uses Linux IPC mechanism w/ shared memory and semaphores to provide
+ * a threasafe way of handling shared memory operations.
+ */
+ if ( (buf->tail + l) < buf->size ){
+ /* before we append the message we need to check the HEAD so that we won't
+ overwrite any of the message that we still need and adjust HEAD to point
+ to the next message! */
+ if ( buf->tail < buf->head){
+ if ( (buf->tail + l) >= buf->head ){
+ /* we need to move the HEAD to point to the next message
+ * Theoretically we have enough room to add the whole message to the
+ * buffer, because of the first outer IF statement, so we don't have
+ * to worry about overflows here!
+ */
+ int k= buf->tail + l - buf->head; /* we need to know how many bytes
+ we are overwriting to make
+ enough room */
+ char *c=memchr(buf->data+buf->head + k,'\0',buf->size - (buf->head + k));
+ if (c != NULL) {/* do a sanity check just in case! */
+ buf->head = c - buf->data + 1; /* we need to convert pointer to
+ offset + skip the '\0' since
+ we need to point to the beginning
+ of the next message */
+ /* Note: HEAD is only used to "retrieve" messages, it's not used
+ when writing messages into our buffer */
+ }else{ /* show an error message to know we messed up? */
+ printf("Weird! Can't find the terminator token??? \n");
+ buf->head=0;
+ }
+ }
+ } /* in other cases no overflows have been done yet, so we don't care! */
+
+ /* we should be ok to append the message now */
+ strncpy(buf->data + buf->tail,msg,l); /* append our message */
+ buf->tail+=l; /* count full message w/ '\0' terminating char */
+ }else{
+ /* we need to break up the message and "circle" it around */
+ char *c;
+ int k=buf->tail + l - buf->size; /* count # of bytes we don't fit */
+
+ /* We need to move HEAD! This is always the case since we are going
+ * to "circle" the message.
+ */
+ c=memchr(buf->data + k ,'\0', buf->size - k);
+
+ if (c != NULL) /* if we don't have '\0'??? weird!!! */{
+ /* move head pointer*/
+ buf->head=c-buf->data+1;
+
+ /* now write the first part of the message */
+ strncpy(buf->data + buf->tail, msg, l - k - 1);
+
+ /* ALWAYS terminate end of buffer w/ '\0' */
+ buf->data[buf->size-1]='\0';
+
+ /* now write out the rest of the string to the beginning of the buffer */
+ strcpy(buf->data, &msg[l-k-1]);
+
+ /* we need to place the TAIL at the end of the message */
+ buf->tail = k + 1;
+ }else{
+ printf("Weird! Can't find the terminator token from the beginning??? \n");
+ buf->head = buf->tail = 0; /* reset buffer, since it's probably corrupted */
+ }
+
+ }
+ sem_up(s_semid);
+}
+#endif /* CONFIG_FEATURE_IPC_SYSLOG */
+
+/* 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, ...)
{
- int fd;
- va_list arguments;
-
- if ((fd = device_open(logFilePath, O_WRONLY|O_CREAT|O_NOCTTY|O_APPEND|O_NONBLOCK)) >= 0) {
- va_start(arguments, fmt);
- vdprintf(fd, fmt, arguments);
- va_end(arguments);
- close(fd);
- } else {
- /* Always send console messages to /dev/console so people will see them. */
- if ((fd = device_open(__DEV_CONSOLE, O_WRONLY|O_NOCTTY|O_NONBLOCK)) >= 0) {
- va_start(arguments, fmt);
- vdprintf(fd, fmt, arguments);
- va_end(arguments);
- close(fd);
+ int fd;
+ struct flock fl;
+ va_list arguments;
+
+ fl.l_whence = SEEK_SET;
+ fl.l_start = 0;
+ fl.l_len = 1;
+
+#ifdef CONFIG_FEATURE_IPC_SYSLOG
+ if ((circular_logging == TRUE) && (buf != NULL)){
+ char b[1024];
+ va_start (arguments, fmt);
+ vsnprintf (b, sizeof(b)-1, fmt, arguments);
+ va_end (arguments);
+ circ_message(b);
+
+ }else
+#endif
+ 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);
} else {
- fprintf(stderr, "Bummer, can't print: ");
- va_start(arguments, fmt);
- vfprintf(stderr, fmt, arguments);
- fflush(stderr);
- va_end(arguments);
+ /* 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);
+ }
}
- }
}
-static void logMessage( int pri, char* msg)
+static void logMessage (int pri, char *msg)
{
- time_t now;
- char *timestamp;
- static char res[20];
- CODE *c_pri, *c_fac;
-
- 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);
-
- if (strlen(msg) < 16 || msg[3] != ' ' || msg[6] != ' ' ||
- msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
- {
- 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);
+ 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 == NULL || c_pri->c_name == NULL)
+ snprintf(res, sizeof(res), "<%d>", pri);
+ else
+ snprintf(res, sizeof(res), "%s.%s", c_fac->c_name, c_pri->c_name);
+ }
+
+ if (strlen(msg) < 16 || msg[3] != ' ' || msg[6] != ' ' ||
+ msg[9] != ':' || msg[12] != ':' || msg[15] != ' ') {
+ time(&now);
+ timestamp = ctime(&now) + 4;
+ timestamp[15] = '\0';
+ } else {
+ timestamp = msg;
+ timestamp[15] = '\0';
+ msg += 16;
+ }
+
+ /* todo: supress duplicates */
+
+#ifdef CONFIG_FEATURE_REMOTE_LOG
+ /* send message to remote logger */
+ if ( -1 != remotefd){
+static const int IOV_COUNT = 2;
+ struct iovec iov[IOV_COUNT];
+ struct iovec *v = iov;
+
+ memset(&res, 0, sizeof(res));
+ snprintf(res, sizeof(res), "<%d>", pri);
+ v->iov_base = res ;
+ v->iov_len = strlen(res);
+ v++;
+
+ v->iov_base = msg;
+ v->iov_len = strlen(msg);
+writev_retry:
+ if ( -1 == writev(remotefd,iov, IOV_COUNT)){
+ if (errno == EINTR) goto writev_retry;
+ error_msg_and_die("cannot write to remote file handle on"
+ "%s:%d",RemoteHost,RemotePort);
+ }
+ }
+ if (local_logging == TRUE)
+#endif
+ /* 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(LOG_SYSLOG|LOG_INFO, "syslogd exiting");
- exit( TRUE);
-}
+ logMessage(LOG_SYSLOG | LOG_INFO, "System log daemon exiting.");
+ unlink(lfile);
+#ifdef CONFIG_FEATURE_IPC_SYSLOG
+ ipcsyslog_cleanup();
+#endif
-static void restart_signal(int sig)
-{
- /* pretend to restart */
- logMessage(LOG_SYSLOG|LOG_INFO, "syslogd restarting");
+ exit(TRUE);
}
static void domark(int sig)
{
- if (MarkInterval > 0) {
- logMessage(LOG_SYSLOG|LOG_INFO, "-- MARK --");
- signal(SIGALRM, domark);
- alarm(MarkInterval);
- }
+ if (MarkInterval > 0) {
+ logMessage(LOG_SYSLOG | LOG_INFO, "-- MARK --");
+ alarm(MarkInterval);
+ }
}
-static void doSyslogd(void)
+/* This must be a #define, since when DODEBUG and BUFFERS_GO_IN_BSS are
+ * enabled, we otherwise get a "storage size isn't constant error. */
+static int serveConnection (char* tmpbuf, int n_read)
{
- struct sockaddr_un sunx;
- int fd, conn;
- size_t addrLength;
- char buf[1024];
- char *q, *p = buf;
- int readSize;
-
- /* Remove any preexisting socket/file */
- unlink(_PATH_LOG);
-
- /* Set up sig handlers */
- signal(SIGINT, quit_signal);
- signal(SIGTERM, quit_signal);
- signal(SIGQUIT, quit_signal);
- signal(SIGHUP, restart_signal);
- signal(SIGALRM, domark);
- alarm(MarkInterval);
-
- memset(&sunx, 0, sizeof(sunx));
- sunx.sun_family = AF_UNIX; /* Unix domain socket */
- strncpy(sunx.sun_path, _PATH_LOG, sizeof(sunx.sun_path));
- if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0 ) {
- perror("Couldn't obtain descriptor for socket " _PATH_LOG);
- exit( FALSE);
- }
-
- addrLength = sizeof(sunx.sun_family) + strlen(sunx.sun_path);
- if ( (bind(fd, (struct sockaddr *) &sunx, addrLength)) ||
- (chmod(_PATH_LOG, 0666) < 0) ||
- (listen(fd, 5)) )
- {
- perror("Could not connect to socket " _PATH_LOG);
- exit( FALSE);
- }
-
-
- /* Get localhost's name */
- gethostname(LocalHostName, sizeof(LocalHostName));
- if ( (p = strchr(LocalHostName, '.')) ) {
- *p++ = '\0';
- }
-
- logMessage(LOG_SYSLOG|LOG_INFO, "syslogd started: "
- "BusyBox v" BB_VER " (" BB_BT ") multi-call binary");
-
-
- while ((conn = accept(fd, (struct sockaddr *) &sunx,
- &addrLength)) >= 0)
- {
- while ((readSize=read(conn, buf, sizeof(buf))) > 0)
- {
- char line[1025];
- unsigned char c;
- int pri = (LOG_USER|LOG_NOTICE);
-
- memset (line, 0, sizeof(line));
- p = buf;
- q = line;
- 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)) {
- *q++ = '^';
- *q++ = c ^ 0100;
- } else {
- *q++ = c;
+ char *p = tmpbuf;
+
+ while (p < tmpbuf + n_read) {
+
+ int pri = (LOG_USER | LOG_NOTICE);
+ char line[ MAXLINE + 1 ];
+ unsigned char c;
+
+ char *q = line;
+
+ while ( (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)) {
+ *q++ = '^';
+ *q++ = c ^ 0100;
+ } else {
+ *q++ = c;
+ }
+ p++;
}
+ *q = '\0';
p++;
- }
- *q = '\0';
-
- /* Now log it */
- logMessage( pri, line);
+ /* Now log it */
+ logMessage (pri, line);
}
- close(conn);
- }
+ return n_read;
+}
+
+
+#ifdef CONFIG_FEATURE_REMOTE_LOG
+static void init_RemoteLog (void)
+{
+
+ struct sockaddr_in remoteaddr;
+ struct hostent *hostinfo;
+ int len = sizeof(remoteaddr);
+
+ memset(&remoteaddr, 0, len);
+
+ remotefd = socket(AF_INET, SOCK_DGRAM, 0);
+
+ if (remotefd < 0) {
+ error_msg_and_die("cannot create socket");
+ }
+
+ hostinfo = xgethostbyname(RemoteHost);
+
+ remoteaddr.sin_family = AF_INET;
+ remoteaddr.sin_addr = *(struct in_addr *) *hostinfo->h_addr_list;
+ remoteaddr.sin_port = htons(RemotePort);
+
+ /*
+ Since we are using UDP sockets, connect just sets the default host and port
+ for future operations
+ */
+ if ( 0 != (connect(remotefd, (struct sockaddr *) &remoteaddr, len))){
+ error_msg_and_die("cannot connect to remote host %s:%d", RemoteHost, RemotePort);
+ }
- close(fd);
}
+#endif
+
+static void doSyslogd (void) __attribute__ ((noreturn));
+static void doSyslogd (void)
+{
+ struct sockaddr_un sunx;
+ socklen_t addrLength;
+
+ int sock_fd;
+ fd_set fds;
+
+ /* 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
+ signal (SIGALRM, domark);
+ alarm (MarkInterval);
+
+ /* Create the syslog file so realpath() can work. */
+ if (realpath (_PATH_LOG, lfile) != NULL)
+ unlink (lfile);
+
+ 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_DGRAM, 0)) < 0)
+ perror_msg_and_die ("Couldn't get file descriptor for socket " _PATH_LOG);
+
+ addrLength = sizeof (sunx.sun_family) + strlen (sunx.sun_path);
+ if (bind(sock_fd, (struct sockaddr *) &sunx, addrLength) < 0)
+ perror_msg_and_die ("Could not connect to socket " _PATH_LOG);
+
+ if (chmod (lfile, 0666) < 0)
+ perror_msg_and_die ("Could not set permission on " _PATH_LOG);
+
+
+#ifdef CONFIG_FEATURE_IPC_SYSLOG
+ if (circular_logging == TRUE ){
+ ipcsyslog_init();
+ }
+#endif
+
+#ifdef CONFIG_FEATURE_REMOTE_LOG
+ if (doRemoteLog == TRUE){
+ init_RemoteLog();
+ }
+#endif
+ logMessage (LOG_SYSLOG | LOG_INFO, "syslogd started: " BB_BANNER);
+
+ for (;;) {
+
+ FD_ZERO (&fds);
+ FD_SET (sock_fd, &fds);
+
+ if (select (sock_fd+1, &fds, NULL, NULL, NULL) < 0) {
+ if (errno == EINTR) {
+ /* alarm may have happened. */
+ continue;
+ }
+ perror_msg_and_die ("select error");
+ }
+
+ if (FD_ISSET (sock_fd, &fds)) {
+ int i;
+ RESERVE_CONFIG_BUFFER(tmpbuf, BUFSIZ + 1);
+
+ memset(tmpbuf, '\0', BUFSIZ+1);
+ if ( (i = recv(sock_fd, tmpbuf, BUFSIZ, 0)) > 0) {
+ serveConnection(tmpbuf, i);
+ } else {
+ perror_msg_and_die ("UNIX socket error");
+ }
+ RELEASE_CONFIG_BUFFER (tmpbuf);
+ }/* FD_ISSET() */
+ } /* for main loop */
+}
extern int syslogd_main(int argc, char **argv)
{
- int pid;
- int doFork = TRUE;
-
- while (--argc > 0 && **(++argv) == '-') {
- while (*(++(*argv))) {
- switch (**argv) {
- case 'm':
- if (--argc == 0) {
- usage(syslogd_usage);
+ int opt;
+#if ! defined(__uClinux__)
+ int doFork = TRUE;
+#endif
+
+ char *p;
+
+ /* do normal option parsing */
+ while ((opt = getopt(argc, argv, "m:nO:R:LC")) > 0) {
+ switch (opt) {
+ case 'm':
+ MarkInterval = atoi(optarg) * 60;
+ break;
+#if ! defined(__uClinux__)
+ case 'n':
+ doFork = FALSE;
+ break;
+#endif
+ case 'O':
+ logFilePath = xstrdup(optarg);
+ break;
+#ifdef CONFIG_FEATURE_REMOTE_LOG
+ case 'R':
+ RemoteHost = xstrdup(optarg);
+ if ( (p = strchr(RemoteHost, ':'))){
+ RemotePort = atoi(p+1);
+ *p = '\0';
+ }
+ doRemoteLog = TRUE;
+ break;
+ case 'L':
+ local_logging = TRUE;
+ break;
+#endif
+#ifdef CONFIG_FEATURE_IPC_SYSLOG
+ case 'C':
+ circular_logging = TRUE;
+ break;
+#endif
+ default:
+ show_usage();
}
- MarkInterval = atoi(*(++argv))*60;
- break;
- case 'n':
- doFork = FALSE;
- break;
- case 'O':
- if (--argc == 0) {
- usage(syslogd_usage);
- }
- logFilePath = *(++argv);
- break;
- default:
- usage(syslogd_usage);
- }
}
- }
-
- if (doFork == TRUE) {
- pid = fork();
- if ( pid < 0 )
- exit( pid);
- else if ( pid == 0 ) {
- doSyslogd();
+
+#ifdef CONFIG_FEATURE_REMOTE_LOG
+ /* If they have not specified remote logging, then log locally */
+ if (doRemoteLog == FALSE)
+ local_logging = TRUE;
+#endif
+
+
+ /* Store away localhost's name before the fork */
+ gethostname(LocalHostName, sizeof(LocalHostName));
+ if ((p = strchr(LocalHostName, '.'))) {
+ *p++ = '\0';
}
- } else {
+
+ umask(0);
+
+#if ! defined(__uClinux__)
+ if (doFork == TRUE) {
+ if (daemon(0, 1) < 0)
+ perror_msg_and_die("daemon");
+ }
+#endif
doSyslogd();
- }
- exit( TRUE);
-}
+ return EXIT_SUCCESS;
+}
+/*
+Local Variables
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
projects / oweals / busybox.git / blobdiff