xref: /openbsd-src/sbin/slaacd/log.c (revision 237d25002962fb5cca26a300df242e18a5ff8d51)
1*237d2500Sflorian /*	$OpenBSD: log.c,v 1.3 2024/07/14 08:57:32 florian Exp $	*/
20acf3e2dSflorian 
30acf3e2dSflorian /*
40acf3e2dSflorian  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
50acf3e2dSflorian  *
60acf3e2dSflorian  * Permission to use, copy, modify, and distribute this software for any
70acf3e2dSflorian  * purpose with or without fee is hereby granted, provided that the above
80acf3e2dSflorian  * copyright notice and this permission notice appear in all copies.
90acf3e2dSflorian  *
100acf3e2dSflorian  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
110acf3e2dSflorian  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
120acf3e2dSflorian  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
130acf3e2dSflorian  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
140acf3e2dSflorian  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
150acf3e2dSflorian  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
160acf3e2dSflorian  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
170acf3e2dSflorian  */
18*237d2500Sflorian 
190acf3e2dSflorian #include <stdio.h>
200acf3e2dSflorian #include <stdlib.h>
210acf3e2dSflorian #include <stdarg.h>
220acf3e2dSflorian #include <string.h>
230acf3e2dSflorian #include <syslog.h>
240acf3e2dSflorian #include <errno.h>
250acf3e2dSflorian #include <time.h>
260acf3e2dSflorian 
270acf3e2dSflorian #include "log.h"
280acf3e2dSflorian 
290acf3e2dSflorian static int		 debug;
300acf3e2dSflorian static int		 verbose;
310acf3e2dSflorian static const char	*log_procname;
320acf3e2dSflorian 
330acf3e2dSflorian void
log_init(int n_debug,int facility)340acf3e2dSflorian log_init(int n_debug, int facility)
350acf3e2dSflorian {
360acf3e2dSflorian 	extern char	*__progname;
370acf3e2dSflorian 
380acf3e2dSflorian 	debug = n_debug;
390acf3e2dSflorian 	verbose = n_debug;
400acf3e2dSflorian 	log_procinit(__progname);
410acf3e2dSflorian 
420acf3e2dSflorian 	if (!debug)
430acf3e2dSflorian 		openlog(__progname, LOG_PID | LOG_NDELAY, facility);
440acf3e2dSflorian 
450acf3e2dSflorian 	tzset();
460acf3e2dSflorian }
470acf3e2dSflorian 
480acf3e2dSflorian void
log_procinit(const char * procname)490acf3e2dSflorian log_procinit(const char *procname)
500acf3e2dSflorian {
510acf3e2dSflorian 	if (procname != NULL)
520acf3e2dSflorian 		log_procname = procname;
530acf3e2dSflorian }
540acf3e2dSflorian 
550acf3e2dSflorian void
log_setverbose(int v)560acf3e2dSflorian log_setverbose(int v)
570acf3e2dSflorian {
580acf3e2dSflorian 	verbose = v;
590acf3e2dSflorian }
600acf3e2dSflorian 
610acf3e2dSflorian int
log_getverbose(void)620acf3e2dSflorian log_getverbose(void)
630acf3e2dSflorian {
640acf3e2dSflorian 	return (verbose);
650acf3e2dSflorian }
660acf3e2dSflorian 
670acf3e2dSflorian void
logit(int pri,const char * fmt,...)680acf3e2dSflorian logit(int pri, const char *fmt, ...)
690acf3e2dSflorian {
700acf3e2dSflorian 	va_list	ap;
710acf3e2dSflorian 
720acf3e2dSflorian 	va_start(ap, fmt);
730acf3e2dSflorian 	vlog(pri, fmt, ap);
740acf3e2dSflorian 	va_end(ap);
750acf3e2dSflorian }
760acf3e2dSflorian 
770acf3e2dSflorian void
vlog(int pri,const char * fmt,va_list ap)780acf3e2dSflorian vlog(int pri, const char *fmt, va_list ap)
790acf3e2dSflorian {
800acf3e2dSflorian 	char	*nfmt;
810acf3e2dSflorian 	int	 saved_errno = errno;
820acf3e2dSflorian 
830acf3e2dSflorian 	if (debug) {
840acf3e2dSflorian 		/* best effort in out of mem situations */
850acf3e2dSflorian 		if (asprintf(&nfmt, "%s\n", fmt) == -1) {
860acf3e2dSflorian 			vfprintf(stderr, fmt, ap);
870acf3e2dSflorian 			fprintf(stderr, "\n");
880acf3e2dSflorian 		} else {
890acf3e2dSflorian 			vfprintf(stderr, nfmt, ap);
900acf3e2dSflorian 			free(nfmt);
910acf3e2dSflorian 		}
920acf3e2dSflorian 		fflush(stderr);
930acf3e2dSflorian 	} else
940acf3e2dSflorian 		vsyslog(pri, fmt, ap);
950acf3e2dSflorian 
960acf3e2dSflorian 	errno = saved_errno;
970acf3e2dSflorian }
980acf3e2dSflorian 
990acf3e2dSflorian void
log_warn(const char * emsg,...)1000acf3e2dSflorian log_warn(const char *emsg, ...)
1010acf3e2dSflorian {
1020acf3e2dSflorian 	char		*nfmt;
1030acf3e2dSflorian 	va_list		 ap;
1040acf3e2dSflorian 	int		 saved_errno = errno;
1050acf3e2dSflorian 
1060acf3e2dSflorian 	/* best effort to even work in out of memory situations */
1070acf3e2dSflorian 	if (emsg == NULL)
1080acf3e2dSflorian 		logit(LOG_ERR, "%s", strerror(saved_errno));
1090acf3e2dSflorian 	else {
1100acf3e2dSflorian 		va_start(ap, emsg);
1110acf3e2dSflorian 
1120acf3e2dSflorian 		if (asprintf(&nfmt, "%s: %s", emsg,
1130acf3e2dSflorian 		    strerror(saved_errno)) == -1) {
1140acf3e2dSflorian 			/* we tried it... */
1150acf3e2dSflorian 			vlog(LOG_ERR, emsg, ap);
1160acf3e2dSflorian 			logit(LOG_ERR, "%s", strerror(saved_errno));
1170acf3e2dSflorian 		} else {
1180acf3e2dSflorian 			vlog(LOG_ERR, nfmt, ap);
1190acf3e2dSflorian 			free(nfmt);
1200acf3e2dSflorian 		}
1210acf3e2dSflorian 		va_end(ap);
1220acf3e2dSflorian 	}
1230acf3e2dSflorian 
1240acf3e2dSflorian 	errno = saved_errno;
1250acf3e2dSflorian }
1260acf3e2dSflorian 
1270acf3e2dSflorian void
log_warnx(const char * emsg,...)1280acf3e2dSflorian log_warnx(const char *emsg, ...)
1290acf3e2dSflorian {
1300acf3e2dSflorian 	va_list	 ap;
1310acf3e2dSflorian 
1320acf3e2dSflorian 	va_start(ap, emsg);
1330acf3e2dSflorian 	vlog(LOG_ERR, emsg, ap);
1340acf3e2dSflorian 	va_end(ap);
1350acf3e2dSflorian }
1360acf3e2dSflorian 
1370acf3e2dSflorian void
log_info(const char * emsg,...)1380acf3e2dSflorian log_info(const char *emsg, ...)
1390acf3e2dSflorian {
1400acf3e2dSflorian 	va_list	 ap;
1410acf3e2dSflorian 
1420acf3e2dSflorian 	va_start(ap, emsg);
1430acf3e2dSflorian 	vlog(LOG_INFO, emsg, ap);
1440acf3e2dSflorian 	va_end(ap);
1450acf3e2dSflorian }
1460acf3e2dSflorian 
1470acf3e2dSflorian void
log_debug(const char * emsg,...)1480acf3e2dSflorian log_debug(const char *emsg, ...)
1490acf3e2dSflorian {
1500acf3e2dSflorian 	va_list	 ap;
1510acf3e2dSflorian 
1520acf3e2dSflorian 	if (verbose) {
1530acf3e2dSflorian 		va_start(ap, emsg);
1540acf3e2dSflorian 		vlog(LOG_DEBUG, emsg, ap);
1550acf3e2dSflorian 		va_end(ap);
1560acf3e2dSflorian 	}
1570acf3e2dSflorian }
1580acf3e2dSflorian 
1590acf3e2dSflorian static void
vfatalc(int code,const char * emsg,va_list ap)1600acf3e2dSflorian vfatalc(int code, const char *emsg, va_list ap)
1610acf3e2dSflorian {
1620acf3e2dSflorian 	static char	s[BUFSIZ];
1630acf3e2dSflorian 	const char	*sep;
1640acf3e2dSflorian 
1650acf3e2dSflorian 	if (emsg != NULL) {
1660acf3e2dSflorian 		(void)vsnprintf(s, sizeof(s), emsg, ap);
1670acf3e2dSflorian 		sep = ": ";
1680acf3e2dSflorian 	} else {
1690acf3e2dSflorian 		s[0] = '\0';
1700acf3e2dSflorian 		sep = "";
1710acf3e2dSflorian 	}
1720acf3e2dSflorian 	if (code)
1730acf3e2dSflorian 		logit(LOG_CRIT, "fatal in %s: %s%s%s",
1740acf3e2dSflorian 		    log_procname, s, sep, strerror(code));
1750acf3e2dSflorian 	else
1760acf3e2dSflorian 		logit(LOG_CRIT, "fatal in %s%s%s", log_procname, sep, s);
1770acf3e2dSflorian }
1780acf3e2dSflorian 
1790acf3e2dSflorian void
fatal(const char * emsg,...)1800acf3e2dSflorian fatal(const char *emsg, ...)
1810acf3e2dSflorian {
1820acf3e2dSflorian 	va_list	ap;
1830acf3e2dSflorian 
1840acf3e2dSflorian 	va_start(ap, emsg);
1850acf3e2dSflorian 	vfatalc(errno, emsg, ap);
1860acf3e2dSflorian 	va_end(ap);
1870acf3e2dSflorian 	exit(1);
1880acf3e2dSflorian }
1890acf3e2dSflorian 
1900acf3e2dSflorian void
fatalx(const char * emsg,...)1910acf3e2dSflorian fatalx(const char *emsg, ...)
1920acf3e2dSflorian {
1930acf3e2dSflorian 	va_list	ap;
1940acf3e2dSflorian 
1950acf3e2dSflorian 	va_start(ap, emsg);
1960acf3e2dSflorian 	vfatalc(0, emsg, ap);
1970acf3e2dSflorian 	va_end(ap);
1980acf3e2dSflorian 	exit(1);
1990acf3e2dSflorian }
200