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