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logger.c
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logger.c
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/* $Revision: 1.1 $
** Modified by Rich $alz <rsalz@osf.org> to be more portable to older
** systems.
*/
/*
* Copyright (c) 1983 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.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1983 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)logger.c 6.14 (Berkeley) 6/1/90";
#endif /* not lint */
#include <stdio.h>
#define SYSLOG_NAMES
#include "syslog.h"
#include <ctype.h>
/*
** LOGGER -- read and log utility
**
** This routine reads from an input and arranges to write the
** result on the system log, along with a useful tag.
*/
/*
** Return a string representation of errno.
*/
static char *
xstrerror(e)
int e;
{
extern int sys_nerr;
extern char *sys_errlist[];
static char buff[30];
if (e >= 0 && e < sys_nerr)
return sys_errlist[e];
(void)sprintf(buff, "Error code %d\n", e);
return buff;
}
main(argc, argv)
int argc;
char **argv;
{
extern char *optarg;
extern int errno, optind;
int pri = LOG_NOTICE;
int ch, logflags = 0;
char *tag, buf[1024], *getlogin();
tag = NULL;
while ((ch = getopt(argc, argv, "f:ip:st:")) != EOF)
switch((char)ch) {
case 'f': /* file to log */
if (freopen(optarg, "r", stdin) == NULL) {
(void)fprintf(stderr, "logger: %s: %s.\n",
optarg, xstrerror(errno));
exit(1);
}
break;
case 'i': /* log process id also */
logflags |= LOG_PID;
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 ? tag : getlogin(), logflags, 0);
(void) fclose(stdout);
/* log input line if appropriate */
if (argc > 0) {
register char *p, *endp;
int len;
for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) {
len = strlen(*argv);
if (p + len > endp && p > buf) {
syslog(pri, "%s", buf);
p = buf;
}
if (len > sizeof(buf) - 1)
syslog(pri, "%s", *argv++);
else {
if (p != buf)
*p++ = ' ';
bcopy(*argv++, p, len);
*(p += len) = '\0';
}
}
if (p != buf)
syslog(pri, "%s", buf);
exit(0);
}
/* main loop */
while (fgets(buf, sizeof(buf), stdin) != NULL)
syslog(pri, "%s", buf);
exit(0);
}
/*
* Decode a symbolic name to a numeric value
*/
pencode(s)
register char *s;
{
char *save;
int fac, lev;
for (save = s; *s && *s != '.'; ++s);
if (*s) {
*s = '\0';
fac = decode(save, facilitynames);
if (fac < 0)
bailout("unknown facility name: ", save);
*s++ = '.';
}
else {
fac = 0;
s = save;
}
lev = decode(s, prioritynames);
if (lev < 0)
bailout("unknown priority name: ", save);
return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
}
decode(name, codetab)
char *name;
CODE *codetab;
{
register CODE *c;
if (isdigit(*name))
return (atoi(name));
for (c = codetab; c->c_name; c++)
if (!strcasecmp(name, c->c_name))
return (c->c_val);
return (-1);
}
bailout(msg, arg)
char *msg, *arg;
{
fprintf(stderr, "logger: %s%s\n", msg, arg);
exit(1);
}
usage()
{
fputs("logger: [-i] [-f file] [-p pri] [-t tag] [ message ... ]\n",
stderr);
exit(1);
}

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