/* $NetBSD: syslog.c,v 1.8 1995/04/11 02:57:52 cgd Exp $ */ /* * Copyright (c) 1983, 1988, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #if defined(LIBC_SCCS) && !defined(lint) #if 0 static char sccsid[] = "@(#)syslog.c 8.4 (Berkeley) 3/18/94"; #else static char rcsid[] = "$NetBSD: syslog.c,v 1.8 1995/04/11 02:57:52 cgd Exp $"; #endif #endif /* LIBC_SCCS and not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #if __STDC__ #include #else #include #endif static int LogFile = -1; /* fd for log */ static int connected; /* have done connect */ static int LogStat = 0; /* status bits, set by openlog() */ static const char *LogTag = NULL; /* string to tag the entry with */ static int LogFacility = LOG_USER; /* default facility code */ static int LogMask = 0xff; /* mask of priorities to be logged */ extern char *__progname; /* Program name, from crt0. */ /* * syslog, vsyslog -- * print message on log file; output is intended for syslogd(8). */ void #if __STDC__ syslog(int pri, const char *fmt, ...) #else syslog(pri, fmt, va_alist) int pri; char *fmt; va_dcl #endif { va_list ap; #if __STDC__ va_start(ap, fmt); #else va_start(ap); #endif vsyslog(pri, fmt, ap); va_end(ap); } void vsyslog(pri, fmt, ap) int pri; register const char *fmt; va_list ap; { register int cnt; register char ch, *p, *t; time_t now; int fd, saved_errno; char *stdp, tbuf[2048], fmt_cpy[1024]; #define INTERNALLOG LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID /* Check for invalid bits. */ if (pri & ~(LOG_PRIMASK|LOG_FACMASK)) { syslog(INTERNALLOG, "syslog: unknown facility/priority: %x", pri); pri &= LOG_PRIMASK|LOG_FACMASK; } /* Check priority against setlogmask values. */ if (!(LOG_MASK(LOG_PRI(pri)) & LogMask)) return; saved_errno = errno; /* Set default facility if none specified. */ if ((pri & LOG_FACMASK) == 0) pri |= LogFacility; /* Build the message. */ (void)time(&now); p = tbuf + sprintf(tbuf, "<%d>", pri); p += strftime(p, sizeof (tbuf) - (p - tbuf), "%h %e %T ", localtime(&now)); if (LogStat & LOG_PERROR) stdp = p; if (LogTag == NULL) LogTag = __progname; if (LogTag != NULL) p += sprintf(p, "%s", LogTag); if (LogStat & LOG_PID) p += sprintf(p, "[%d]", getpid()); if (LogTag != NULL) { *p++ = ':'; *p++ = ' '; } /* Substitute error message for %m. */ for (t = fmt_cpy; ch = *fmt; ++fmt) if (ch == '%' && fmt[1] == 'm') { ++fmt; t += sprintf(t, "%s", strerror(saved_errno)); } else *t++ = ch; *t = '\0'; p += vsprintf(p, fmt_cpy, ap); cnt = p - tbuf; /* Output to stderr if requested. */ if (LogStat & LOG_PERROR) { struct iovec iov[2]; register struct iovec *v = iov; v->iov_base = stdp; v->iov_len = cnt - (stdp - tbuf); ++v; v->iov_base = "\n"; v->iov_len = 1; (void)writev(STDERR_FILENO, iov, 2); } /* Get connected, output the message to the local logger. */ if (!connected) openlog(LogTag, LogStat | LOG_NDELAY, 0); if (send(LogFile, tbuf, cnt, 0) >= 0) return; /* * Output the message to the console; don't worry about blocking, * if console blocks everything will. Make sure the error reported * is the one from the syslogd failure. */ if (LogStat & LOG_CONS && (fd = open(_PATH_CONSOLE, O_WRONLY, 0)) >= 0) { (void)strcat(tbuf, "\r\n"); cnt += 2; p = strchr(tbuf, '>') + 1; (void)write(fd, p, cnt - (p - tbuf)); (void)close(fd); } } static struct sockaddr SyslogAddr; /* AF_UNIX address of local logger */ void openlog(ident, logstat, logfac) const 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; (void)strncpy(SyslogAddr.sa_data, _PATH_LOG, sizeof(SyslogAddr.sa_data)); if (LogStat & LOG_NDELAY) { if ((LogFile = socket(AF_UNIX, SOCK_DGRAM, 0)) == -1) return; (void)fcntl(LogFile, F_SETFD, 1); } } if (LogFile != -1 && !connected) if (connect(LogFile, &SyslogAddr, sizeof(SyslogAddr)) == -1) { (void)close(LogFile); LogFile = -1; } else connected = 1; } void closelog() { (void)close(LogFile); LogFile = -1; connected = 0; } /* setlogmask -- set the log mask level */ int setlogmask(pmask) int pmask; { int omask; omask = LogMask; if (pmask != 0) LogMask = pmask; return (omask); }