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log.c
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log.c
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/*
* Copyright (c) 2008 David Gwynne <[email protected]>
*
* 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 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <err.h>
#include <time.h>
#include <syslog.h>
#include <stdarg.h>
#include "log.h"
static const struct __logger conslogger = {
err,
errx,
warn,
warnx,
warnc,
warnx, /* info */
warnx /* debug */
};
__dead static void syslog_err(int, const char *, ...)
__attribute__((__format__ (printf, 2, 3)));
__dead static void syslog_errx(int, const char *, ...)
__attribute__((__format__ (printf, 2, 3)));
static void syslog_warn(const char *, ...)
__attribute__((__format__ (printf, 1, 2)));
static void syslog_warnx(const char *, ...)
__attribute__((__format__ (printf, 1, 2)));
static void syslog_warnc(int, const char *, ...)
__attribute__((__format__ (printf, 2, 3)));
static void syslog_info(const char *, ...)
__attribute__((__format__ (printf, 1, 2)));
static void syslog_debug(const char *, ...)
__attribute__((__format__ (printf, 1, 2)));
static void syslog_vstrerror(int, int, const char *, va_list)
__attribute__((__format__ (printf, 3, 0)));
static const struct __logger syslogger = {
syslog_err,
syslog_errx,
syslog_warn,
syslog_warnx,
syslog_warnc,
syslog_info,
syslog_debug
};
const struct __logger *__logger = &conslogger;
void
logger_syslog(const char *progname)
{
openlog(progname, LOG_PID | LOG_NDELAY, LOG_DAEMON);
tzset();
__logger = &syslogger;
}
static void
syslog_vstrerror(int e, int priority, const char *fmt, va_list ap)
{
char *s;
if (vasprintf(&s, fmt, ap) == -1) {
syslog(LOG_EMERG, "unable to alloc in syslog_vstrerror");
exit(1);
}
syslog(priority, "%s: %s", s, strerror(e));
free(s);
}
static void
syslog_err(int ecode, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
syslog_vstrerror(errno, LOG_CRIT, fmt, ap);
va_end(ap);
exit(ecode);
}
static void
syslog_errx(int ecode, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vsyslog(LOG_CRIT, fmt, ap);
va_end(ap);
exit(ecode);
}
static void
syslog_warn(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
syslog_vstrerror(errno, LOG_ERR, fmt, ap);
va_end(ap);
}
static void
syslog_warnx(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vsyslog(LOG_ERR, fmt, ap);
va_end(ap);
}
static void
syslog_warnc(int code, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
syslog_vstrerror(code, LOG_ERR, fmt, ap);
va_end(ap);
}
static void
syslog_info(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vsyslog(LOG_INFO, fmt, ap);
va_end(ap);
}
static void
syslog_debug(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vsyslog(LOG_DEBUG, fmt, ap);
va_end(ap);
}