/* $NetBSD: logger.c,v 1.17 2012/04/27 06:30:48 wiz Exp $ */
/*
* Copyright (c) 1983, 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1983, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)logger.c 8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: logger.c,v 1.17 2012/04/27 06:30:48 wiz Exp $");
#endif /* not lint */
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <err.h>
#define SYSLOG_NAMES
#include <syslog.h>
static int decode(const char *, const CODE *);
static int pencode(char *);
__dead static void usage(void);
/*
* logger -- read and log utility
*
* Reads from an input and arranges to write the result on the system
* log.
*/
int
main(int argc, char *argv[])
{
int ch, logflags, pri;
const char *tag;
const char *sd = "-";
const char *msgid = "-";
char buf[1024];
tag = NULL;
pri = LOG_NOTICE;
logflags = 0;
while ((ch = getopt(argc, argv, "cd:f:im:np:st:")) != -1)
switch((char)ch) {
case 'c': /* log to console */
logflags |= LOG_CONS;
break;
case 'd': /* structured data field */
sd = optarg;
break;
case 'f': /* file to log */
if (freopen(optarg, "r", stdin) == NULL)
err(EXIT_FAILURE, "%s", optarg);
break;
case 'i': /* log process id also */
logflags |= LOG_PID;
break;
case 'm': /* msgid field */
msgid = optarg;
break;
case 'n': /* open log file immediately */
logflags |= LOG_NDELAY;
break;
case 'p': /* priority */
pri = pencode(optarg);
break;
case 's': /* log to standard error */
logflags |= LOG_PERROR;
break;
case 't': /* tag */
tag = optarg;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
/* setup for logging */
openlog(tag != NULL ? tag : getlogin(), logflags, 0);
(void)fclose(stdout);
/* log input line if appropriate */
if (argc > 0) {
char *p, *endp;
size_t len;
for (p = buf, endp = buf + sizeof(buf) - 2; *argv != NULL;) {
len = strlen(*argv);
if (p + len > endp && p > buf) {
syslogp(pri, msgid, sd, "%s", buf);
p = buf;
}
if (len > sizeof(buf) - 1)
syslogp(pri, msgid, sd, "%s", *argv++);
else {
if (p != buf)
*p++ = ' ';
memmove(p, *argv++, len);
*(p += len) = '\0';
}
}
if (p != buf)
syslogp(pri, msgid, sd, "%s", buf);
} else /* TODO: allow syslog-protocol messages from file/stdin
* but that will require parsing the line to split
* it into three fields.
*/
while (fgets(buf, sizeof(buf), stdin) != NULL)
syslogp(pri, msgid, sd, "%s", buf);
exit(EXIT_SUCCESS);
/* NOTREACHED */
}
/*
* Decode a symbolic name to a numeric value
*/
static int
pencode(char *s)
{
char *save;
int fac, lev;
for (save = s; *s != '\0' && *s != '.'; ++s)
;
if (*s != '\0') {
*s = '\0';
fac = decode(save, facilitynames);
if (fac < 0)
errx(EXIT_FAILURE, "unknown facility name: %s", save);
*s++ = '.';
} else {
fac = 0;
s = save;
}
lev = decode(s, prioritynames);
if (lev < 0)
errx(EXIT_FAILURE, "unknown priority name: %s", s);
return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
}
static int
decode(const char *name, const CODE *codetab)
{
const CODE *c;
if (isdigit((unsigned char)*name))
return (atoi(name));
for (c = codetab; c->c_name != NULL; c++)
if (strcasecmp(name, c->c_name) == 0)
return (c->c_val);
return (-1);
}
static void
usage(void)
{
(void)fprintf(stderr,
"Usage: %s [-cins] [-d SD] [-f file] [-m msgid] "
"[-p pri] [-t tag] [message ...]\n",
getprogname());
exit(EXIT_FAILURE);
}
