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OS/2 Shareware BBS: 35 Internet
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syslog2b.zip
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syslog.c
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1996-12-02
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/*
** Modified by Jochen Friedrich <jochen@audio.pfalz.de> for OS/2.
*/
/*
* 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.
*/
/*
* 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
*/
#include <os2.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <stdarg.h>
#include <stdio.h>
#include <io.h>
#include <string.h>
#include <time.h>
#include <process.h>
#include <errno.h>
#include <utils.h>
#include "syslog.h"
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 */
void syslog(int pri, char *fmt, ...)
{
va_list ap;
va_start(ap,fmt);
vsyslog(pri, fmt, ap);
va_end(ap);
}
void vsyslog(int pri, char *fmt, va_list ap)
{
extern int errno;
register int cnt;
register char *p;
time_t now;
int fd, saved_errno;
char tbuf[2048], fmt_cpy[1024], *stdp;
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, 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 (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;
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);
cnt = strlen(tbuf);
/* output to stderr if requested */
if (LogStat & LOG_PERROR) {
write(2, tbuf,cnt);
write(2,"\r\n",2);
}
/* output the message to the local logger */
if (send(LogFile, tbuf, cnt, 0) >= 0 || !(LogStat&LOG_CONS))
return;
}
static struct sockaddr_in SyslogAddr; /* AF_INET address of local logger */
/*
* OPENLOG -- open system log
*/
void openlog(char *ident, int logstat, int logfac)
{
sock_init();
if (ident != NULL)
LogTag = ident;
LogStat = logstat;
if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0)
LogFacility = logfac;
if (LogFile == -1) {
SyslogAddr.sin_family = AF_INET;
SyslogAddr.sin_port = htons(514);
SyslogAddr.sin_addr.s_addr = INADDR_ANY;
if (LogStat & LOG_NDELAY) {
LogFile = socket(AF_INET, SOCK_DGRAM, 0);
}
}
if (LogFile != -1 && !connected &&
connect(LogFile, (struct sockaddr*) &SyslogAddr, sizeof(SyslogAddr)) != -1)
connected = 1;
}
/*
* CLOSELOG -- close the system log
*/
void closelog(void)
{
(void) soclose(LogFile);
LogFile = -1;
connected = 0;
}
static int LogMask = 0xff; /* mask of priorities to be logged */
/*
* SETLOGMASK -- set the log mask level
*/
int setlogmask(int pmask)
{
int omask;
omask = LogMask;
if (pmask != 0)
LogMask = pmask;
return (omask);
}