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/* $OpenBSD: log.c,v 1.4 2007/02/22 03:32:39 reyk 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 <sys/param.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/tree.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <net/if.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <event.h>
#include <openssl/ssl.h>
#include "hoststated.h"
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) {
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);
}
const char *
host_status(enum host_status status)
{
switch (status) {
case HOST_DOWN:
return ("down");
case HOST_UNKNOWN:
return ("unknown");
case HOST_UP:
return ("up");
};
/* NOTREACHED */
return ("invalid");
}
const char *
table_check(enum table_check check)
{
switch (check) {
case CHECK_NOCHECK:
return ("none");
case CHECK_ICMP:
return ("icmp");
case CHECK_TCP:
return ("tcp");
case CHECK_HTTP_CODE:
return ("http code");
case CHECK_HTTP_DIGEST:
return ("http digest");
case CHECK_SEND_EXPECT:
return ("send expect");
};
/* NOTREACHED */
return ("invalid");
}
const char *
print_availability(u_long cnt, u_long up)
{
static char buf[BUFSIZ];
if (cnt == 0)
return ("");
bzero(buf, sizeof(buf));
snprintf(buf, sizeof(buf), "%.2f%%", (double)up / cnt * 100);
return (buf);
}
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