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/* $OpenBSD$ */
/*
* 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 "compat.h"
#include <sys/types.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <time.h>
#include <unistd.h>
#include "log.h"
#define TRACE_DEBUG 0x1
static int foreground;
static int verbose;
void vlog(int, const char *, va_list);
void logit(int, const char *, ...)
__attribute__((format (printf, 2, 3)));
void
log_init(int n_foreground)
{
foreground = n_foreground;
if (!foreground)
openlog(getprogname(), LOG_PID | LOG_NDELAY, LOG_MAIL);
tzset();
}
void
log_setverbose(int v)
{
verbose = v;
}
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 (foreground) {
/* best effort in out of mem situations */
if (asprintf(&nfmt, "%s[%u]: %s\n", getprogname(), getpid(), fmt) == -1) {
fprintf(stderr, "%s[%u]: ", getprogname(), getpid());
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 (verbose & TRACE_DEBUG) {
va_start(ap, emsg);
vlog(LOG_DEBUG, emsg, ap);
va_end(ap);
}
}
void
log_trace(int mask, const char *emsg, ...)
{
va_list ap;
if (verbose & mask) {
va_start(ap, emsg);
vlog(LOG_DEBUG, emsg, ap);
va_end(ap);
}
}
static void
fatal_arg(const char *emsg, va_list ap)
{
#define FATALBUFSIZE 1024
static char ebuffer[FATALBUFSIZE];
if (emsg == NULL)
(void)strlcpy(ebuffer, strerror(errno), sizeof ebuffer);
else {
if (errno) {
(void)vsnprintf(ebuffer, sizeof ebuffer, emsg, ap);
(void)strlcat(ebuffer, ": ", sizeof ebuffer);
(void)strlcat(ebuffer, strerror(errno), sizeof ebuffer);
}
else
(void)vsnprintf(ebuffer, sizeof ebuffer, emsg, ap);
}
logit(LOG_CRIT, "fatal: %s", ebuffer);
}
void
fatal(const char *emsg, ...)
{
va_list ap;
va_start(ap, emsg);
fatal_arg(emsg, ap);
va_end(ap);
exit(1);
}
void
fatalx(const char *emsg, ...)
{
va_list ap;
errno = 0;
va_start(ap, emsg);
fatal_arg(emsg, ap);
va_end(ap);
exit(1);
}
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