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- /*
- * Copyright (c) 1983, 1988 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- /*
- * SYSLOG -- print message on log file
- *
- * This routine looks a lot like printf, except that it outputs to the
- * log file instead of the standard output. Also:
- * adds a timestamp,
- * prints the module name in front of the message,
- * has some other formatting types (or will sometime),
- * adds a newline on the end of the message.
- *
- * The output of this routine is intended to be read by syslogd(8).
- *
- * Author: Eric Allman
- * Modified to use UNIX domain IPC by Ralph Campbell
- * modified for System V by Bruce Lilly
- */
-
- #include "sendmail.h"
- #ifdef NEED_SYSLOG
-
- # if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)syslog.c 5.20 (Berkeley) 1/19/89";
- # endif /* LIBC_SCCS and not lint */
-
- # ifdef SYSV
- # include <string.h>
- # else /* !SYSV */
- # include <strings.h>
- # endif /* SYSV */
- # include <netdb.h>
-
- # ifdef __STDC__
- void closelog();
- # else /* !__STDC__ */
- void closelog(), vsyslog();
- # endif /* __STDC__ */
-
- # define LOGNAME "/dev/log"
- # define CONSOLE "/dev/console"
-
- static int LogFile = -1; /* fd for log */
- static int connected; /* have done connect */
- static int LogStat = 0; /* status bits, set by openlog() */
- static char *LogTag = "syslog"; /* string to tag the entry with */
- static int LogFacility = LOG_USER; /* default facility code */
-
- # ifndef __STDC__
- void
- syslog(pri, fmt, args)
- int pri, args;
- char *fmt;
- {
- vsyslog(pri, fmt, &args);
- }
-
- /*VARARGS2*/
- void
- vsyslog(pri, fmt, va_alist)
- int pri;
- register char *fmt;
- va_dcl
- # else /* __STDC__ */
-
- void
- syslog(int pri, char *fmt, ...)
- # endif /* !__STDC__ */
- va_list ap;
- extern int errno;
- register int cnt;
- register char *p;
- time_t now;
- int pid, saved_errno;
- char tbuf[2048], fmt_cpy[1024];
- unsigned int more_time;
-
- # ifdef __STDC__
- va_start(ap, fmt);
- # else /* !__STDC__ */
- va_start(ap);
- # endif /* __STDC__ */
- saved_errno = errno;
-
- /* see if we should just throw out this message */
- if ((u_int)LOG_FAC(pri) >= LOG_NFACILITIES ||
- !LOG_MASK(LOG_PRI(pri)) || (pri &~ (LOG_PRIMASK|LOG_FACMASK)))
- {
- va_end(ap);
- return;
- }
- if (LogFile < 0 || !connected)
- openlog(LogTag, LogStat | LOG_NDELAY, 0);
-
- /* set default facility if none specified */
- if ((pri & LOG_FACMASK) == 0)
- pri |= LogFacility;
-
- /* build the message */
- (void)time(&now);
- (void)sprintf(tbuf, "<%d>%.15s ", pri, ctime(&now) + 4);
- for (p = tbuf; *p; ++p);
- if (LogTag) {
- (void)strcpy(p, LogTag);
- for (; *p; ++p);
- }
- if (LogStat & LOG_PID) {
- (void)sprintf(p, "[%d]", getpid());
- for (; *p; ++p);
- }
- if (LogTag) {
- *p++ = ':';
- *p++ = ' ';
- }
-
- /* substitute error message for %m */
- {
- register char ch, *t1, *t2;
-
- for (t1 = fmt_cpy; ch = *fmt; ++fmt)
- if (ch == '%' && fmt[1] == 'm') {
- ++fmt;
- for (t2 = strerror(saved_errno);
- *t1 = *t2++; ++t1);
- }
- else
- *t1++ = ch;
- *t1 = '\0';
- }
-
- (void)vsprintf(p, fmt_cpy, ap);
- va_end(ap);
-
- /* output the message to the local logger */
- if (send(LogFile, tbuf, cnt = strlen(tbuf), 0) >= 0 ||
- !(LogStat&LOG_CONS))
- return;
-
- /* output the message to the console */
- pid = vfork();
- if (pid == -1)
- return;
- if (pid == 0) {
- int fd;
-
- (void)signal(SIGALRM, SIG_DFL);
- # ifndef SYSV
- sigsetmask((long)~sigmask(SIGALRM));
- # endif /* !SYSV */
- more_time = 5;
- while (more_time = alarm(more_time))
- ;
- if ((fd = open(CONSOLE, O_WRONLY, 0)) < 0)
- return;
- (void)alarm((u_int)0);
- (void)strcat(tbuf, "\r");
- p = index(tbuf, '>') + 1;
- (void)write(fd, p, cnt + 1 - (p - tbuf));
- (void)close(fd);
- _exit(0);
- }
- if (!(LogStat & LOG_NOWAIT))
- while ((cnt = wait((int *)0)) > 0 && cnt != pid);
- }
-
- static struct sockaddr SyslogAddr; /* AF_UNIX address of local logger */
- static struct sockaddr_in SyslogPort; /* AF_INET address of local logger */
- /*
- * OPENLOG -- open system log
- */
- void
- openlog(ident, logstat, logfac)
- char *ident;
- int logstat, logfac;
- {
- if (ident != NULL)
- LogTag = ident;
- LogStat = logstat;
- if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0)
- LogFacility = logfac;
- if (LogFile == -1) {
- SyslogAddr.sa_family = AF_UNIX;
- strncpy(SyslogAddr.sa_data, LOGNAME, sizeof SyslogAddr.sa_data);
- if (LogStat & LOG_NDELAY) {
- LogFile = socket(AF_UNIX, SOCK_DGRAM, 0);
- fcntl(LogFile, F_SETFD, 1);
- }
- }
- if (LogFile != -1 && !connected &&
- connect(LogFile, &SyslogAddr, sizeof(SyslogAddr)) != -1) {
- connected = 1;
- return;
- } else
- if (LogFile != -1)
- (void) close(LogFile);
- if (LogFile == -1) {{
- struct servent *se;
- struct hostent *host = 0;
- char hbuf[32];
-
- if (gethostname(hbuf, 31) == 0) {
- strtok(hbuf, ".");
- host = gethostbyname(hbuf);
- }
- if (host == NULL)
- if ((host = gethostbyname("localhost")) == NULL)
- return;
- if((se = getservbyname("syslog", "udp")) == NULL)
- return;
- SyslogPort.sin_port = se->s_port;
- SyslogPort.sin_family = AF_INET;
- if((LogFile = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
- return;
- (void) memcpy((caddr_t)&SyslogPort.sin_addr, (caddr_t)host->h_addr,
- host->h_length);
- }
- if (LogFile != -1 && !connected &&
- connect(LogFile, (struct sockaddr *)&SyslogPort, (int)sizeof(SyslogPort)) != -1) {
- connected = 1;
- return;
- } else {
- LogStat |= LOG_CONS;
- if (LogFile != -1)
- (void) close(LogFile);
- }
- }
-
- /*
- * CLOSELOG -- close the system log
- */
- void
- closelog()
- {
- (void) close(LogFile);
- LogFile = -1;
- connected = 0;
- }
-
- static int LogMask = 0xff; /* mask of priorities to be logged */
- /*
- * SETLOGMASK -- set the log mask level
- */
- int
- setlogmask(pmask)
- int pmask;
- {
- int omask;
-
- omask = LogMask;
- if (pmask != 0)
- LogMask = pmask;
- return (omask);
- }
- #endif /* NEED_SYSLOG */
-