162 lines
3.0 KiB
C
162 lines
3.0 KiB
C
/* $OpenBSD: log.c,v 1.1 2008/06/26 15:10:01 pyr Exp $ */
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/* $FreeBSD$ */
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/*
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* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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void log_init(int);
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void log_warn(const char *, ...);
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void log_warnx(const char *, ...);
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void log_info(const char *, ...);
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void log_debug(const char *, ...);
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__dead2 void fatal(const char *);
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__dead2 void fatalx(const char *);
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int debug;
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void vlog(int, const char *, va_list);
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void logit(int, const char *, ...);
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void
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log_init(int n_debug)
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{
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extern char *__progname;
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debug = n_debug;
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if (!debug)
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openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON);
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tzset();
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}
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void
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logit(int pri, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vlog(pri, fmt, ap);
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va_end(ap);
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}
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void
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vlog(int pri, const char *fmt, va_list ap)
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{
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char *nfmt;
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if (debug) {
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/* best effort in out of mem situations */
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if (asprintf(&nfmt, "%s\n", fmt) == -1) {
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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} else {
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vfprintf(stderr, nfmt, ap);
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free(nfmt);
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}
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fflush(stderr);
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} else
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vsyslog(pri, fmt, ap);
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}
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void
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log_warn(const char *emsg, ...)
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{
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char *nfmt;
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va_list ap;
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/* best effort to even work in out of memory situations */
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if (emsg == NULL)
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logit(LOG_CRIT, "%s", strerror(errno));
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else {
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va_start(ap, emsg);
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if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) {
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/* we tried it... */
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vlog(LOG_CRIT, emsg, ap);
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logit(LOG_CRIT, "%s", strerror(errno));
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} else {
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vlog(LOG_CRIT, nfmt, ap);
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free(nfmt);
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}
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va_end(ap);
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}
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}
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void
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log_warnx(const char *emsg, ...)
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{
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va_list ap;
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va_start(ap, emsg);
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vlog(LOG_CRIT, emsg, ap);
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va_end(ap);
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}
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void
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log_info(const char *emsg, ...)
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{
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va_list ap;
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va_start(ap, emsg);
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vlog(LOG_INFO, emsg, ap);
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va_end(ap);
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}
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void
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log_debug(const char *emsg, ...)
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{
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va_list ap;
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if (debug > 1) {
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va_start(ap, emsg);
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vlog(LOG_DEBUG, emsg, ap);
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va_end(ap);
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}
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}
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void
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fatal(const char *emsg)
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{
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if (emsg == NULL)
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logit(LOG_CRIT, "fatal: %s", strerror(errno));
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else
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if (errno)
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logit(LOG_CRIT, "fatal: %s: %s",
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emsg, strerror(errno));
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else
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logit(LOG_CRIT, "fatal: %s", emsg);
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exit(1);
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}
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void
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fatalx(const char *emsg)
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{
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errno = 0;
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fatal(emsg);
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}
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