syslogd.c - fp2-dev/platform/external/busybox - Gitiles

 /* vi: set sw=4 ts=4: */
 /*
  * Mini syslogd implementation for busybox
  *
  * Copyright (C) 1999,2000 by Lineo, inc.
  * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.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.
  *
  * 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 "internal.h"
 #include <stdio.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 <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>

 #if __GNU_LIBRARY__ < 5

 typedef unsigned int socklen_t;

 #ifndef __alpha__
 # define __NR_klogctl __NR_syslog
 static inline _syscall3(int, klogctl, int, type, char *, b, int, len);
 #else							/* __alpha__ */
 #define klogctl syslog
 #endif

 #else
 # include <sys/klog.h>
 #endif


 /* SYSLOG_NAMES defined to pull some extra junk from syslog.h */
 #define SYSLOG_NAMES
 #include <sys/syslog.h>

 /* Path for the file where all log messages are written */
 #define __LOG_FILE "/var/log/messages"

 /* Path to the unix socket */
 char lfile[BUFSIZ] = "";

 static char *logFilePath = __LOG_FILE;

 /* interval between marks in seconds */
 static int MarkInterval = 20 * 60;

 /* localhost's name */
 static char LocalHostName[32];

 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_FEATURE_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, ...)
 {
 	int fd;
 	struct flock fl;
 	va_list arguments;

 	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);
 	} 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);
 		}
 	}
 }

 static void logMessage (int pri, char *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 == '\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);
 }

 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);
 	}
 }

 #define BUFSIZE 1023
 static int serveConnection (int conn)
 {
 	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';

 		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;
 			}
 			p++;
 		}
 		*q = '\0';
 		/* Now log it */
 		logMessage (pri, line);
 	}
 	return (0);
 }

 static void doSyslogd (void) __attribute__ ((noreturn));
 static void doSyslogd (void)
 {
 	struct sockaddr_un sunx;
 	socklen_t addrLength;


 	int sock_fd;
 	fd_set fds;

 	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);

 	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);
 				}
 			}
 		}
 	}
 }

 #ifdef BB_FEATURE_KLOGD

 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 ")");

 	klogctl(1, NULL, 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];

 			if (errno == EINTR)
 				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;
 		}
 		logMessage(LOG_KERN | priority, logp);
 	}

 }

 #endif

 static void daemon_init (char **argv, char *dz, void fn (void))
 {
 	setsid();
 	chdir ("/");
 	strncpy(argv[0], dz, strlen(argv[0]));
 	fn();
 	exit(0);
 }

 extern int syslogd_main(int argc, char **argv)
 {
 	int pid, klogd_pid;
 	int doFork = TRUE;

 #ifdef BB_FEATURE_KLOGD
 	int startKlogd = TRUE;
 #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_FEATURE_KLOGD
 			case 'K':
 				startKlogd = FALSE;
 				break;
 #endif
 			case 'O':
 				if (--argc == 0) {
 					usage(syslogd_usage);
 				}
 				logFilePath = *(++argv1);
 				stopDoingThat = TRUE;
 				break;
 			default:
 				usage(syslogd_usage);
 			}
 		}
 	}

 	if (argc > 0)
 		usage(syslogd_usage);

 	/* Store away localhost's name before the fork */
 	gethostname(LocalHostName, sizeof(LocalHostName));
 	if ((p = strchr(LocalHostName, '.'))) {
 		*p++ = '\0';
 	}

 	umask(0);

 #ifdef BB_FEATURE_KLOGD
 	/* Start up the klogd process */
 	if (startKlogd == TRUE) {
 		klogd_pid = fork();
 		if (klogd_pid == 0) {
 			daemon_init (argv, "klogd", doKlogd);
 		}
 	}
 #endif

 	if (doFork == TRUE) {
 		pid = fork();
 		if (pid < 0)
 			exit(pid);
 		else if (pid == 0) {
 			daemon_init (argv, "syslogd", doSyslogd);
 		}
 	} else {
 		doSyslogd();
 	}

 	return(TRUE);
 }

 /*
 Local Variables
 c-file-style: "linux"
 c-basic-offset: 4
 tab-width: 4
 End:
 */
	/* vi: set sw=4 ts=4: */
	/*
	* Mini syslogd implementation for busybox
	*
	* Copyright (C) 1999,2000 by Lineo, inc.
	* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.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.
	*
	* 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 "internal.h"
	#include <stdio.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 <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>

	#if __GNU_LIBRARY__ < 5

	typedef unsigned int socklen_t;

	#ifndef __alpha__
	# define __NR_klogctl __NR_syslog
	static inline _syscall3(int, klogctl, int, type, char *, b, int, len);
	#else /* __alpha__ */
	#define klogctl syslog
	#endif

	#else
	# include <sys/klog.h>
	#endif



	/* SYSLOG_NAMES defined to pull some extra junk from syslog.h */
	#define SYSLOG_NAMES
	#include <sys/syslog.h>

	/* Path for the file where all log messages are written */
	#define __LOG_FILE "/var/log/messages"

	/* Path to the unix socket */
	char lfile[BUFSIZ] = "";

	static char *logFilePath = __LOG_FILE;

	/* interval between marks in seconds */
	static int MarkInterval = 20 * 60;

	/* localhost's name */
	static char LocalHostName[32];

	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_FEATURE_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, ...)
	{
	int fd;
	struct flock fl;
	va_list arguments;

	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);
	} 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);
	}
	}
	}

	static void logMessage (int pri, char *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 == '\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);
	}

	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);
	}
	}

	#define BUFSIZE 1023
	static int serveConnection (int conn)
	{
	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';

	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;
	}
	p++;
	}
	*q = '\0';
	/* Now log it */
	logMessage (pri, line);
	}
	return (0);
	}

	static void doSyslogd (void) __attribute__ ((noreturn));
	static void doSyslogd (void)
	{
	struct sockaddr_un sunx;
	socklen_t addrLength;


	int sock_fd;
	fd_set fds;

	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);

	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);
	}
	}
	}
	}
	}

	#ifdef BB_FEATURE_KLOGD

	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 ")");

	klogctl(1, NULL, 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];

	if (errno == EINTR)
	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;
	}
	logMessage(LOG_KERN \| priority, logp);
	}

	}

	#endif

	static void daemon_init (char *argv, char dz, void fn (void))
	{
	setsid();
	chdir ("/");
	strncpy(argv[0], dz, strlen(argv[0]));
	fn();
	exit(0);
	}

	extern int syslogd_main(int argc, char **argv)
	{
	int pid, klogd_pid;
	int doFork = TRUE;

	#ifdef BB_FEATURE_KLOGD
	int startKlogd = TRUE;
	#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_FEATURE_KLOGD
	case 'K':
	startKlogd = FALSE;
	break;
	#endif
	case 'O':
	if (--argc == 0) {
	usage(syslogd_usage);
	}
	logFilePath = *(++argv1);
	stopDoingThat = TRUE;
	break;
	default:
	usage(syslogd_usage);
	}
	}
	}

	if (argc > 0)
	usage(syslogd_usage);

	/* Store away localhost's name before the fork */
	gethostname(LocalHostName, sizeof(LocalHostName));
	if ((p = strchr(LocalHostName, '.'))) {
	*p++ = '\0';
	}

	umask(0);

	#ifdef BB_FEATURE_KLOGD
	/* Start up the klogd process */
	if (startKlogd == TRUE) {
	klogd_pid = fork();
	if (klogd_pid == 0) {
	daemon_init (argv, "klogd", doKlogd);
	}
	}
	#endif

	if (doFork == TRUE) {
	pid = fork();
	if (pid < 0)
	exit(pid);
	else if (pid == 0) {
	daemon_init (argv, "syslogd", doSyslogd);
	}
	} else {
	doSyslogd();
	}

	return(TRUE);
	}

	/*
	Local Variables
	c-file-style: "linux"
	c-basic-offset: 4
	tab-width: 4
	End:
	*/