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/*
* 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 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 <err.h>
#include <errno.h>
#include <netdb.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"
static int debug;
static char *logqueue;
#define LOGQUEUE_SIZE 1024
void logit(int, const char *, ...);
void vlog(int pri, const char *fmt, va_list ap);
void
log_init(int n_debug)
{
extern char *__progname;
if (logqueue == NULL) {
logqueue = calloc(LOGQUEUE_SIZE, 1);
if (logqueue == NULL)
err(1, NULL);
}
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
log_enqueue(const char *fmt, ...)
{
char tmpbuf[LOGQUEUE_SIZE];
va_list ap;
va_start(ap, fmt);
(void)vsnprintf(tmpbuf, sizeof(tmpbuf), fmt, ap);
va_end(ap);
(void)strlcat(logqueue, tmpbuf, LOGQUEUE_SIZE);
}
void
vlog(int pri, const char *fmt, va_list ap)
{
char tmpbuf[1024];
char logbuf[LOGQUEUE_SIZE + sizeof(tmpbuf)];
if (pri == LOG_DEBUG && !debug) {
logqueue[0] = '\0';
return;
}
(void)vsnprintf(tmpbuf, sizeof(tmpbuf), fmt, ap);
(void)strlcpy(logbuf, logqueue, sizeof(logbuf));
(void)strlcat(logbuf, tmpbuf, sizeof(tmpbuf));
logqueue[0] = '\0';
if (debug) {
fprintf(stderr, "%s\n", logbuf);
fflush(stderr);
} else
syslog(pri, "%s", logbuf);
}
void
log_warn(const char *emsg, ...)
{
char *nfmt;
va_list ap;
if (emsg == NULL)
logit(LOG_CRIT, "%s", strerror(errno));
else {
va_start(ap, emsg);
/* best effort to even work in out of memory situations */
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;
va_start(ap, emsg);
vlog(LOG_DEBUG, emsg, ap);
va_end(ap);
}
void
fatal(const char *emsg)
{
extern char *__progname;
extern __dead void rtdexit(void);
if (emsg == NULL)
logit(LOG_CRIT, "fatal in %s: %s", __progname,
strerror(errno));
else
if (errno)
logit(LOG_CRIT, "fatal in %s: %s: %s",
__progname, emsg, strerror(errno));
else
logit(LOG_CRIT, "fatal in %s: %s",
__progname, emsg);
rtdexit();
}
void
fatalx(const char *emsg)
{
errno = 0;
fatal(emsg);
}
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