187 lines
5 KiB
C
187 lines
5 KiB
C
/* Copyright (c) 1983, 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* #ifndef lint
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* char copyright[] =
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* "@(#) Copyright (c) 1983 Regents of the University of California.\n\
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* All rights reserved.\n";
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* #endif
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*
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* #ifndef lint
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* static char sccsid[] = "@(#)logger.c 6.8 (Berkeley) 6/29/88";
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* #endif
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*
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* Porting to Minix by G. Falzoni <gfalzoni@inwind.it>
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*/
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#include <sys/types.h>
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#include <unistd.h>
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#include <errno.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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/*
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** LOGGER -- read and log utility
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**
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** This program reads from an input and arranges to write the
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** result on the system log, along with a useful tag.
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*/
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#define SYSLOG_NAMES
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#include <syslog.h>
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/*
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** Name: void bailout(char *msg, char *arg);
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** Function: Handles error exit.
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*/
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void bailout(const char *msg, const char *arg)
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{
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fprintf(stderr, "logger: %s %s\n", msg, arg);
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exit(EXIT_FAILURE);
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}
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/*
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** Name: int decode(char *name, struct code * codetab);
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** Function: Decodes a name to the equivalent priority/facility.
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*/
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int decode(char *name, const struct _code * codetab)
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{
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const struct _code *c;
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if (isdigit(*name)) return(atoi(name));
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for (c = codetab; c->c_name; c++)
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if (!strcasecmp(name, c->c_name)) return(c->c_val);
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return(-1);
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}
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/*
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** Name: int pencode(char *s);
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** Function: Decode a symbolic name (facility/priority)
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** to a numeric value.
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*/
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int pencode(char *s)
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{
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char *save;
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int fac, lev;
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for (save = s; *s && *s != '.'; ++s);
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if (*s) {
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*s = '\0';
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fac = decode(save, FacNames);
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if (fac < 0) bailout("unknown facility name:", save);
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*s++ = '.';
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} else {
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fac = 0;
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s = save;
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}
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lev = decode(s, PriNames);
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if (lev < 0) bailout("unknown priority name:", save);
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return((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
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}
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/*
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** Name: int main(int argc, char **argv);
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** Function: Main entry for logger.
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*/
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int main(int argc, char **argv)
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{
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int pri = LOG_NOTICE;
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int ch, logflags = 0;
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char *tag, buf[200];
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static const char usage[] =
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"[-i] [-f file] [-p pri] [-t tag] [ message ... ]";
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tag = NULL;
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while ((ch = getopt(argc, argv, "f:ip:t:")) != EOF) {
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switch ((char) ch) {
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case 'f': /* file to log */
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if (freopen(optarg, "r", stdin) == NULL) {
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bailout(strerror(errno), optarg);
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}
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break;
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case 'i': /* log process id also */
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logflags |= LOG_PID;
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break;
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case 'p': /* priority */
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pri = pencode(optarg);
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break;
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case 't': /* tag */
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tag = optarg;
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break;
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case '?':
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default: bailout(usage, ""); break;
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}
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}
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argc -= optind;
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argv += optind;
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/* Setup for logging */
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openlog(tag ? tag : getlogin(), logflags, 0);
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fclose(stdout);
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if (argc > 0) { /* Log input line if appropriate */
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char *p, *endp;
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int len;
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for (p = buf, endp = buf + sizeof(buf) - 1;;) {
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len = strlen(*argv);
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if (p + len < endp && p > buf) {
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*--p = '\0';
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syslog(pri, buf);
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p = buf;
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}
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if (len > sizeof(buf) - 1) {
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syslog(pri, *argv++);
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if (!--argc) break;
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} else {
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memcpy(p, *argv++, len);
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p += len;
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if (!--argc) break;
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*p++ = ' ';
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*--p = '\0';
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}
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}
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if (p != buf) {
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*p = '\0';
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syslog(pri, buf);
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}
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} else /* Main loop */
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while (fgets(buf, sizeof(buf), stdin) != NULL) syslog(pri, buf);
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return EXIT_SUCCESS;
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}
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/** logger.c **/
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