зеркало из https://github.com/Azure/sonic-openssh.git
242 строки
5.9 KiB
C
242 строки
5.9 KiB
C
/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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*
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* As far as I am concerned, the code I have written for this software
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* can be used freely for any purpose. Any derived versions of this
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* software must be clearly marked as such, and if the derived work is
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* incompatible with the protocol description in the RFC file, it must be
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* called by a name other than "ssh" or "Secure Shell".
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*/
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/*
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* Shared versions of debug(), log(), etc.
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*
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* Copyright (c) 2000 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "includes.h"
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RCSID("$OpenBSD: log.c,v 1.15 2001/01/21 19:05:51 markus Exp $");
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#include "log.h"
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#include "xmalloc.h"
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/* Fatal messages. This function never returns. */
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void
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fatal(const char *fmt,...)
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{
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va_list args;
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va_start(args, fmt);
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do_log(SYSLOG_LEVEL_FATAL, fmt, args);
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va_end(args);
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fatal_cleanup();
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}
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/* Error messages that should be logged. */
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void
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error(const char *fmt,...)
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{
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va_list args;
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va_start(args, fmt);
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do_log(SYSLOG_LEVEL_ERROR, fmt, args);
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va_end(args);
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}
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/* Log this message (information that usually should go to the log). */
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void
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log(const char *fmt,...)
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{
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va_list args;
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va_start(args, fmt);
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do_log(SYSLOG_LEVEL_INFO, fmt, args);
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va_end(args);
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}
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/* More detailed messages (information that does not need to go to the log). */
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void
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verbose(const char *fmt,...)
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{
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va_list args;
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va_start(args, fmt);
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do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
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va_end(args);
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}
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/* Debugging messages that should not be logged during normal operation. */
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void
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debug(const char *fmt,...)
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{
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va_list args;
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va_start(args, fmt);
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do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
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va_end(args);
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}
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void
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debug2(const char *fmt,...)
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{
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va_list args;
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va_start(args, fmt);
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do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
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va_end(args);
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}
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void
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debug3(const char *fmt,...)
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{
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va_list args;
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va_start(args, fmt);
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do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
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va_end(args);
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}
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/* Fatal cleanup */
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struct fatal_cleanup {
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struct fatal_cleanup *next;
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void (*proc) (void *);
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void *context;
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};
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static struct fatal_cleanup *fatal_cleanups = NULL;
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/* Registers a cleanup function to be called by fatal() before exiting. */
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void
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fatal_add_cleanup(void (*proc) (void *), void *context)
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{
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struct fatal_cleanup *cu;
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cu = xmalloc(sizeof(*cu));
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cu->proc = proc;
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cu->context = context;
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cu->next = fatal_cleanups;
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fatal_cleanups = cu;
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}
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/* Removes a cleanup frunction to be called at fatal(). */
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void
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fatal_remove_cleanup(void (*proc) (void *context), void *context)
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{
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struct fatal_cleanup **cup, *cu;
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for (cup = &fatal_cleanups; *cup; cup = &cu->next) {
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cu = *cup;
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if (cu->proc == proc && cu->context == context) {
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*cup = cu->next;
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xfree(cu);
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return;
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}
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}
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fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx\n",
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(u_long) proc, (u_long) context);
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}
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/* Cleanup and exit */
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void
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fatal_cleanup(void)
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{
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struct fatal_cleanup *cu, *next_cu;
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static int called = 0;
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if (called)
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exit(255);
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called = 1;
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/* Call cleanup functions. */
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for (cu = fatal_cleanups; cu; cu = next_cu) {
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next_cu = cu->next;
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debug("Calling cleanup 0x%lx(0x%lx)",
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(u_long) cu->proc, (u_long) cu->context);
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(*cu->proc) (cu->context);
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}
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exit(255);
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}
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/* textual representation of log-facilities/levels */
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static struct {
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const char *name;
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SyslogFacility val;
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} log_facilities[] = {
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{ "DAEMON", SYSLOG_FACILITY_DAEMON },
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{ "USER", SYSLOG_FACILITY_USER },
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{ "AUTH", SYSLOG_FACILITY_AUTH },
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#ifdef LOG_AUTHPRIV
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{ "AUTHPRIV", SYSLOG_FACILITY_AUTHPRIV },
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#endif
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{ "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
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{ "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
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{ "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
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{ "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
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{ "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
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{ "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
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{ "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
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{ "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
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{ NULL, 0 }
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};
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static struct {
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const char *name;
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LogLevel val;
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} log_levels[] =
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{
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{ "QUIET", SYSLOG_LEVEL_QUIET },
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{ "FATAL", SYSLOG_LEVEL_FATAL },
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{ "ERROR", SYSLOG_LEVEL_ERROR },
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{ "INFO", SYSLOG_LEVEL_INFO },
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{ "VERBOSE", SYSLOG_LEVEL_VERBOSE },
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{ "DEBUG", SYSLOG_LEVEL_DEBUG1 },
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{ "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
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{ "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
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{ "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
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{ NULL, 0 }
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};
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SyslogFacility
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log_facility_number(char *name)
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{
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int i;
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if (name != NULL)
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for (i = 0; log_facilities[i].name; i++)
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if (strcasecmp(log_facilities[i].name, name) == 0)
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return log_facilities[i].val;
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return (SyslogFacility) - 1;
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}
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LogLevel
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log_level_number(char *name)
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{
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int i;
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if (name != NULL)
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for (i = 0; log_levels[i].name; i++)
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if (strcasecmp(log_levels[i].name, name) == 0)
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return log_levels[i].val;
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return (LogLevel) - 1;
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}
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