380 lines
8.5 KiB
C
380 lines
8.5 KiB
C
/*
|
|
* Author: Tatu Ylonen <ylo@cs.hut.fi>
|
|
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
|
|
* All rights reserved
|
|
*
|
|
* As far as I am concerned, the code I have written for this software
|
|
* can be used freely for any purpose. Any derived versions of this
|
|
* software must be clearly marked as such, and if the derived work is
|
|
* incompatible with the protocol description in the RFC file, it must be
|
|
* called by a name other than "ssh" or "Secure Shell".
|
|
*/
|
|
/*
|
|
* Copyright (c) 2000 Markus Friedl. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
RCSID("$OpenBSD: log.c,v 1.17 2001/03/04 17:42:28 millert Exp $");
|
|
|
|
#include "log.h"
|
|
#include "xmalloc.h"
|
|
|
|
#include <syslog.h>
|
|
|
|
static LogLevel log_level = SYSLOG_LEVEL_INFO;
|
|
static int log_on_stderr = 1;
|
|
static int log_facility = LOG_AUTH;
|
|
static char *argv0;
|
|
|
|
extern char *__progname;
|
|
|
|
/* textual representation of log-facilities/levels */
|
|
|
|
static struct {
|
|
const char *name;
|
|
SyslogFacility val;
|
|
} log_facilities[] = {
|
|
{ "DAEMON", SYSLOG_FACILITY_DAEMON },
|
|
{ "USER", SYSLOG_FACILITY_USER },
|
|
{ "AUTH", SYSLOG_FACILITY_AUTH },
|
|
{ "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
|
|
{ "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
|
|
{ "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
|
|
{ "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
|
|
{ "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
|
|
{ "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
|
|
{ "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
|
|
{ "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
|
|
{ NULL, 0 }
|
|
};
|
|
|
|
static struct {
|
|
const char *name;
|
|
LogLevel val;
|
|
} log_levels[] =
|
|
{
|
|
{ "QUIET", SYSLOG_LEVEL_QUIET },
|
|
{ "FATAL", SYSLOG_LEVEL_FATAL },
|
|
{ "ERROR", SYSLOG_LEVEL_ERROR },
|
|
{ "INFO", SYSLOG_LEVEL_INFO },
|
|
{ "VERBOSE", SYSLOG_LEVEL_VERBOSE },
|
|
{ "DEBUG", SYSLOG_LEVEL_DEBUG1 },
|
|
{ "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
|
|
{ "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
|
|
{ "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
|
|
{ NULL, 0 }
|
|
};
|
|
|
|
SyslogFacility
|
|
log_facility_number(char *name)
|
|
{
|
|
int i;
|
|
if (name != NULL)
|
|
for (i = 0; log_facilities[i].name; i++)
|
|
if (strcasecmp(log_facilities[i].name, name) == 0)
|
|
return log_facilities[i].val;
|
|
return (SyslogFacility) - 1;
|
|
}
|
|
|
|
LogLevel
|
|
log_level_number(char *name)
|
|
{
|
|
int i;
|
|
if (name != NULL)
|
|
for (i = 0; log_levels[i].name; i++)
|
|
if (strcasecmp(log_levels[i].name, name) == 0)
|
|
return log_levels[i].val;
|
|
return (LogLevel) - 1;
|
|
}
|
|
/* Fatal messages. This function never returns. */
|
|
|
|
void
|
|
fatal(const char *fmt,...)
|
|
{
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
do_log(SYSLOG_LEVEL_FATAL, fmt, args);
|
|
va_end(args);
|
|
fatal_cleanup();
|
|
}
|
|
|
|
/* Error messages that should be logged. */
|
|
|
|
void
|
|
error(const char *fmt,...)
|
|
{
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
do_log(SYSLOG_LEVEL_ERROR, fmt, args);
|
|
va_end(args);
|
|
}
|
|
|
|
/* Log this message (information that usually should go to the log). */
|
|
|
|
void
|
|
log(const char *fmt,...)
|
|
{
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
do_log(SYSLOG_LEVEL_INFO, fmt, args);
|
|
va_end(args);
|
|
}
|
|
|
|
/* More detailed messages (information that does not need to go to the log). */
|
|
|
|
void
|
|
verbose(const char *fmt,...)
|
|
{
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
|
|
va_end(args);
|
|
}
|
|
|
|
/* Debugging messages that should not be logged during normal operation. */
|
|
|
|
void
|
|
debug(const char *fmt,...)
|
|
{
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
|
|
va_end(args);
|
|
}
|
|
|
|
void
|
|
debug2(const char *fmt,...)
|
|
{
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
|
|
va_end(args);
|
|
}
|
|
|
|
void
|
|
debug3(const char *fmt,...)
|
|
{
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
|
|
va_end(args);
|
|
}
|
|
|
|
/* Fatal cleanup */
|
|
|
|
struct fatal_cleanup {
|
|
struct fatal_cleanup *next;
|
|
void (*proc) (void *);
|
|
void *context;
|
|
};
|
|
|
|
static struct fatal_cleanup *fatal_cleanups = NULL;
|
|
|
|
/* Registers a cleanup function to be called by fatal() before exiting. */
|
|
|
|
void
|
|
fatal_add_cleanup(void (*proc) (void *), void *context)
|
|
{
|
|
struct fatal_cleanup *cu;
|
|
|
|
cu = xmalloc(sizeof(*cu));
|
|
cu->proc = proc;
|
|
cu->context = context;
|
|
cu->next = fatal_cleanups;
|
|
fatal_cleanups = cu;
|
|
}
|
|
|
|
/* Removes a cleanup frunction to be called at fatal(). */
|
|
|
|
void
|
|
fatal_remove_cleanup(void (*proc) (void *context), void *context)
|
|
{
|
|
struct fatal_cleanup **cup, *cu;
|
|
|
|
for (cup = &fatal_cleanups; *cup; cup = &cu->next) {
|
|
cu = *cup;
|
|
if (cu->proc == proc && cu->context == context) {
|
|
*cup = cu->next;
|
|
xfree(cu);
|
|
return;
|
|
}
|
|
}
|
|
fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx",
|
|
(u_long) proc, (u_long) context);
|
|
}
|
|
|
|
/* Cleanup and exit */
|
|
void
|
|
fatal_cleanup(void)
|
|
{
|
|
struct fatal_cleanup *cu, *next_cu;
|
|
static int called = 0;
|
|
|
|
if (called)
|
|
exit(255);
|
|
called = 1;
|
|
/* Call cleanup functions. */
|
|
for (cu = fatal_cleanups; cu; cu = next_cu) {
|
|
next_cu = cu->next;
|
|
debug("Calling cleanup 0x%lx(0x%lx)",
|
|
(u_long) cu->proc, (u_long) cu->context);
|
|
(*cu->proc) (cu->context);
|
|
}
|
|
exit(255);
|
|
}
|
|
|
|
|
|
/*
|
|
* Initialize the log.
|
|
*/
|
|
|
|
void
|
|
log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
|
|
{
|
|
argv0 = av0;
|
|
|
|
switch (level) {
|
|
case SYSLOG_LEVEL_QUIET:
|
|
case SYSLOG_LEVEL_FATAL:
|
|
case SYSLOG_LEVEL_ERROR:
|
|
case SYSLOG_LEVEL_INFO:
|
|
case SYSLOG_LEVEL_VERBOSE:
|
|
case SYSLOG_LEVEL_DEBUG1:
|
|
case SYSLOG_LEVEL_DEBUG2:
|
|
case SYSLOG_LEVEL_DEBUG3:
|
|
log_level = level;
|
|
break;
|
|
default:
|
|
fprintf(stderr, "Unrecognized internal syslog level code %d\n",
|
|
(int) level);
|
|
exit(1);
|
|
}
|
|
|
|
log_on_stderr = on_stderr;
|
|
if (on_stderr)
|
|
return;
|
|
|
|
switch (facility) {
|
|
case SYSLOG_FACILITY_DAEMON:
|
|
log_facility = LOG_DAEMON;
|
|
break;
|
|
case SYSLOG_FACILITY_USER:
|
|
log_facility = LOG_USER;
|
|
break;
|
|
case SYSLOG_FACILITY_AUTH:
|
|
log_facility = LOG_AUTH;
|
|
break;
|
|
case SYSLOG_FACILITY_LOCAL0:
|
|
log_facility = LOG_LOCAL0;
|
|
break;
|
|
case SYSLOG_FACILITY_LOCAL1:
|
|
log_facility = LOG_LOCAL1;
|
|
break;
|
|
case SYSLOG_FACILITY_LOCAL2:
|
|
log_facility = LOG_LOCAL2;
|
|
break;
|
|
case SYSLOG_FACILITY_LOCAL3:
|
|
log_facility = LOG_LOCAL3;
|
|
break;
|
|
case SYSLOG_FACILITY_LOCAL4:
|
|
log_facility = LOG_LOCAL4;
|
|
break;
|
|
case SYSLOG_FACILITY_LOCAL5:
|
|
log_facility = LOG_LOCAL5;
|
|
break;
|
|
case SYSLOG_FACILITY_LOCAL6:
|
|
log_facility = LOG_LOCAL6;
|
|
break;
|
|
case SYSLOG_FACILITY_LOCAL7:
|
|
log_facility = LOG_LOCAL7;
|
|
break;
|
|
default:
|
|
fprintf(stderr,
|
|
"Unrecognized internal syslog facility code %d\n",
|
|
(int) facility);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
#define MSGBUFSIZ 1024
|
|
|
|
void
|
|
do_log(LogLevel level, const char *fmt, va_list args)
|
|
{
|
|
char msgbuf[MSGBUFSIZ];
|
|
char fmtbuf[MSGBUFSIZ];
|
|
char *txt = NULL;
|
|
int pri = LOG_INFO;
|
|
|
|
if (level > log_level)
|
|
return;
|
|
|
|
switch (level) {
|
|
case SYSLOG_LEVEL_FATAL:
|
|
if (!log_on_stderr)
|
|
txt = "fatal";
|
|
pri = LOG_CRIT;
|
|
break;
|
|
case SYSLOG_LEVEL_ERROR:
|
|
if (!log_on_stderr)
|
|
txt = "error";
|
|
pri = LOG_ERR;
|
|
break;
|
|
case SYSLOG_LEVEL_INFO:
|
|
pri = LOG_INFO;
|
|
break;
|
|
case SYSLOG_LEVEL_VERBOSE:
|
|
pri = LOG_INFO;
|
|
break;
|
|
case SYSLOG_LEVEL_DEBUG1:
|
|
txt = "debug1";
|
|
pri = LOG_DEBUG;
|
|
break;
|
|
case SYSLOG_LEVEL_DEBUG2:
|
|
txt = "debug2";
|
|
pri = LOG_DEBUG;
|
|
break;
|
|
case SYSLOG_LEVEL_DEBUG3:
|
|
txt = "debug3";
|
|
pri = LOG_DEBUG;
|
|
break;
|
|
default:
|
|
txt = "internal error";
|
|
pri = LOG_ERR;
|
|
break;
|
|
}
|
|
if (txt != NULL) {
|
|
snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
|
|
vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
|
|
} else {
|
|
vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
|
|
}
|
|
if (log_on_stderr) {
|
|
fprintf(stderr, "%s\r\n", msgbuf);
|
|
} else {
|
|
openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
|
|
syslog(pri, "%.500s", msgbuf);
|
|
closelog();
|
|
}
|
|
}
|