File: [local] / src / usr.bin / logger / logger.c (download)
Revision 1.19, Sun Dec 4 23:50:48 2022 UTC (17 months, 2 weeks ago) by cheloha
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, HEAD Changes since 1.18: +1 -2 lines
userspace: remove vestigial '?' cases from top-level getopt(3) loops
getopt(3) returns '?' when it encounters a flag not present in the in
the optstring or if a flag is missing its option argument. We can
handle this case with the "default" failure case with no loss of
legibility. Hence, remove all the redundant "case '?':" lines.
Prompted by dlg@. With help from dlg@ and millert@.
Link: https://marc.info/?l=openbsd-tech&m=167011979726449&w=2
ok naddy@ millert@ dlg@
|
/* $OpenBSD: logger.c,v 1.19 2022/12/04 23:50:48 cheloha Exp $ */
/* $NetBSD: logger.c,v 1.4 1994/12/22 06:27:00 jtc 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 <errno.h>
#include <unistd.h>
#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <err.h>
#define SYSLOG_NAMES
#include <syslog.h>
int decode(char *, CODE *);
int pencode(char *);
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;
char *tag, buf[1024];
tag = NULL;
pri = LOG_NOTICE;
logflags = 0;
while ((ch = getopt(argc, argv, "cf:ip:st:")) != -1)
switch(ch) {
case 'c': /* log to console */
logflags |= LOG_CONS;
break;
case 'f': /* file to log */
if (freopen(optarg, "r", stdin) == NULL) {
(void)fprintf(stderr, "logger: %s: %s.\n",
optarg, strerror(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;
default:
usage();
}
argc -= optind;
argv += optind;
/* setup for logging */
openlog(tag ? tag : getlogin(), logflags, 0);
(void) fclose(stdout);
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
/* log input line if appropriate */
if (argc > 0) {
char *p, *endp;
size_t 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);
} else
while (fgets(buf, sizeof(buf), stdin) != NULL)
syslog(pri, "%s", buf);
exit(0);
}
/*
* Decode a symbolic name to a numeric value
*/
int
pencode(char *s)
{
char *save;
int fac, lev;
for (save = s; *s && *s != '.'; ++s);
if (*s) {
*s = '\0';
fac = decode(save, facilitynames);
if (fac < 0) {
(void)fprintf(stderr,
"logger: unknown facility name: %s.\n", save);
exit(1);
}
*s++ = '.';
}
else {
fac = 0;
s = save;
}
lev = decode(s, prioritynames);
if (lev < 0) {
(void)fprintf(stderr,
"logger: unknown priority name: %s.\n", save);
exit(1);
}
return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
}
int
decode(char *name, CODE *codetab)
{
CODE *c;
if (isdigit((unsigned char)*name)) {
const char *errstr;
int n = strtonum(name, 0, INT_MAX, &errstr);
if (!errstr)
return (n);
}
for (c = codetab; c->c_name; c++)
if (!strcasecmp(name, c->c_name))
return (c->c_val);
return (-1);
}
void
usage(void)
{
(void)fprintf(stderr,
"usage: logger [-cis] [-f file] [-p pri] [-t tag] [message ...]\n");
exit(1);
}