From 05f2f1839c2712ca77e86aa679dc909d051fc23b Mon Sep 17 00:00:00 2001 From: Rainer Gerhards Date: Mon, 8 Nov 2004 13:52:36 +0000 Subject: Initial revision --- syslog.c | 254 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 254 insertions(+) create mode 100644 syslog.c (limited to 'syslog.c') diff --git a/syslog.c b/syslog.c new file mode 100644 index 00000000..0d63c81d --- /dev/null +++ b/syslog.c @@ -0,0 +1,254 @@ +/* + * 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: (1) source distributions retain this entire copyright notice and + * comment, and (2) distributions including binaries display the following + * acknowledgement: ``This product includes software developed by the + * University of California, Berkeley and its contributors'' in the + * documentation or other materials provided with the distribution and in + * all advertising materials mentioning features or use of this software. + * 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)syslog.c 5.28 (Berkeley) 6/27/90"; +#endif /* LIBC_SCCS and not lint */ + +/* + * 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 + * + * Sat Dec 11 11:58:31 CST 1993: Dr. Wettstein + * Changes to allow compilation with no complains under -Wall. + * + * Thu Jan 18 11:16:11 CST 1996: Dr. Wettstein + * Added patch to close potential security hole. This is the same + * patch which was announced in the linux-security mailing lists + * and incorporated into the libc version of syslog.c. + * + * Sun Mar 11 20:23:44 CET 2001: Martin Schulze + * Use SOCK_DGRAM for loggin, renables it to work. + * + */ + +#include +#include +#include +#include +#include +#if 0 +#include "syslog.h" +#include "pathnames.h" +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define _PATH_LOGNAME "/dev/log" + +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 = "syslog"; /* string to tag the entry with */ +static int LogFacility = LOG_USER; /* default facility code */ + +void +syslog(int pri, const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + vsyslog(pri, fmt, ap); + va_end(ap); +} + +void +vsyslog(pri, fmt, ap) + int pri; + const char *fmt; + va_list ap; +{ + register int cnt; + register char *p; + time_t now; + int fd, saved_errno; + char tbuf[2048], fmt_cpy[1024], *stdp = (char *) 0; + + saved_errno = errno; + + /* see if we should just throw out this message */ + if (!LOG_MASK(LOG_PRI(pri)) || (pri &~ (LOG_PRIMASK|LOG_FACMASK))) + return; + if (LogFile < 0 || !connected) + openlog(LogTag, LogStat | LOG_NDELAY, LogFacility); + + /* 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 (LogStat & LOG_PERROR) + stdp = 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; + char *strerror(); + + for (t1 = fmt_cpy; + (ch = *fmt) != '\0' && t1iov_base = stdp; + v->iov_len = cnt - (stdp - tbuf); + ++v; + v->iov_base = "\n"; + v->iov_len = 1; + (void)writev(2, iov, 2); + } + + /* output the message to the local logger */ + if (write(LogFile, tbuf, cnt + 1) >= 0 || !(LogStat&LOG_CONS)) + return; + + /* + * output the message to the console; don't worry about + * blocking, if console blocks everything will. + */ + if ((fd = open(_PATH_CONSOLE, O_WRONLY|O_NOCTTY, 0)) < 0) + return; + (void)strcat(tbuf, "\r\n"); + cnt += 2; + p = index(tbuf, '>') + 1; + (void)write(fd, p, cnt - (p - tbuf)); + (void)close(fd); +} + +#ifndef TESTING +static struct sockaddr SyslogAddr; /* AF_UNIX address of local logger */ +#endif +/* + * OPENLOG -- open system log + */ +void +openlog(ident, logstat, logfac) + const char *ident; + int logstat, logfac; +{ + if (ident != NULL) + LogTag = ident; + LogStat = logstat; + +#ifdef ALLOW_KERNEL_LOGGING + if ((logfac &~ LOG_FACMASK) == 0) +#else + if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0) +#endif + LogFacility = logfac; + +#ifndef TESTING + if (LogFile == -1) { + SyslogAddr.sa_family = AF_UNIX; + strncpy(SyslogAddr.sa_data, _PATH_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.sa_family)+ + strlen(SyslogAddr.sa_data)) != -1) +#else + LogFile = fileno(stdout); +#endif + connected = 1; +} + +/* + * CLOSELOG -- close the system log + */ +void +closelog() +{ +#ifndef TESTING + (void) close(LogFile); +#endif + 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); +} -- cgit v1.2.3