524840d8d0
PJDLOG_ASSERT() and PJDLOG_VERIFY() that will check the given condition and log the problem where appropriate. The difference between those two is that PJDLOG_VERIFY() always work and PJDLOG_ASSERT() can be turned off by defining NDEBUG. MFC after: 1 month
388 lines
7.7 KiB
C
388 lines
7.7 KiB
C
/*-
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* Copyright (c) 2009-2010 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Pawel Jakub Dawidek under sponsorship from
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* the FreeBSD Foundation.
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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 AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <assert.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include "pjdlog.h"
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static int pjdlog_mode = PJDLOG_MODE_STD;
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static int pjdlog_debug_level = 0;
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static char pjdlog_prefix[128];
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/*
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* Configure where the logs should go.
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* By default they are send to stdout/stderr, but after going into background
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* (eg. by calling daemon(3)) application is responsible for changing mode to
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* PJDLOG_MODE_SYSLOG, so logs will be send to syslog.
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*/
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void
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pjdlog_mode_set(int mode)
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{
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assert(mode == PJDLOG_MODE_STD || mode == PJDLOG_MODE_SYSLOG);
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pjdlog_mode = mode;
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}
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/*
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* Return current mode.
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*/
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int
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pjdlog_mode_get(void)
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{
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return (pjdlog_mode);
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}
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/*
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* Set debug level. All the logs above the level specified here will be
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* ignored.
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*/
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void
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pjdlog_debug_set(int level)
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{
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assert(level >= 0);
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pjdlog_debug_level = level;
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}
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/*
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* Return current debug level.
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*/
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int
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pjdlog_debug_get(void)
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{
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return (pjdlog_debug_level);
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}
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/*
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* Set prefix that will be used before each log.
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* Setting prefix to NULL will remove it.
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*/
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void
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pjdlog_prefix_set(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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pjdlog_prefix_setv(fmt, ap);
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va_end(ap);
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}
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/*
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* Set prefix that will be used before each log.
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* Setting prefix to NULL will remove it.
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*/
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void
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pjdlog_prefix_setv(const char *fmt, va_list ap)
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{
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assert(fmt != NULL);
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vsnprintf(pjdlog_prefix, sizeof(pjdlog_prefix), fmt, ap);
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}
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/*
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* Convert log level into string.
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*/
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static const char *
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pjdlog_level_string(int loglevel)
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{
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switch (loglevel) {
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case LOG_EMERG:
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return ("EMERG");
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case LOG_ALERT:
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return ("ALERT");
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case LOG_CRIT:
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return ("CRIT");
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case LOG_ERR:
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return ("ERROR");
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case LOG_WARNING:
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return ("WARNING");
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case LOG_NOTICE:
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return ("NOTICE");
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case LOG_INFO:
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return ("INFO");
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case LOG_DEBUG:
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return ("DEBUG");
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}
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assert(!"Invalid log level.");
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abort(); /* XXX: gcc */
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}
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/*
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* Common log routine.
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*/
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void
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pjdlog_common(int loglevel, int debuglevel, int error, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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pjdlogv_common(loglevel, debuglevel, error, fmt, ap);
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va_end(ap);
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}
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/*
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* Common log routine, which can handle regular log level as well as debug
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* level. We decide here where to send the logs (stdout/stderr or syslog).
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*/
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void
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pjdlogv_common(int loglevel, int debuglevel, int error, const char *fmt,
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va_list ap)
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{
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assert(loglevel == LOG_EMERG || loglevel == LOG_ALERT ||
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loglevel == LOG_CRIT || loglevel == LOG_ERR ||
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loglevel == LOG_WARNING || loglevel == LOG_NOTICE ||
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loglevel == LOG_INFO || loglevel == LOG_DEBUG);
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assert(loglevel != LOG_DEBUG || debuglevel > 0);
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assert(error >= -1);
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/* Ignore debug above configured level. */
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if (loglevel == LOG_DEBUG && debuglevel > pjdlog_debug_level)
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return;
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switch (pjdlog_mode) {
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case PJDLOG_MODE_STD:
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{
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FILE *out;
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/*
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* We send errors and warning to stderr and the rest to stdout.
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*/
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switch (loglevel) {
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case LOG_EMERG:
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case LOG_ALERT:
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case LOG_CRIT:
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case LOG_ERR:
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case LOG_WARNING:
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out = stderr;
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break;
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case LOG_NOTICE:
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case LOG_INFO:
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case LOG_DEBUG:
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out = stdout;
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break;
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default:
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assert(!"Invalid loglevel.");
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abort(); /* XXX: gcc */
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}
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fprintf(out, "[%s]", pjdlog_level_string(loglevel));
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/* Attach debuglevel if this is debug log. */
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if (loglevel == LOG_DEBUG)
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fprintf(out, "[%d]", debuglevel);
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fprintf(out, " ");
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fprintf(out, "%s", pjdlog_prefix);
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vfprintf(out, fmt, ap);
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if (error != -1)
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fprintf(out, ": %s.", strerror(error));
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fprintf(out, "\n");
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break;
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}
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case PJDLOG_MODE_SYSLOG:
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{
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char log[1024];
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int len;
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len = snprintf(log, sizeof(log), "%s", pjdlog_prefix);
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if ((size_t)len < sizeof(log))
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len += vsnprintf(log + len, sizeof(log) - len, fmt, ap);
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if (error != -1 && (size_t)len < sizeof(log)) {
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(void)snprintf(log + len, sizeof(log) - len, ": %s.",
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strerror(error));
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}
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syslog(loglevel, "%s", log);
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break;
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}
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default:
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assert(!"Invalid mode.");
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}
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}
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/*
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* Regular logs.
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*/
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void
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pjdlogv(int loglevel, const char *fmt, va_list ap)
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{
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/* LOG_DEBUG is invalid here, pjdlogv?_debug() should be used. */
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assert(loglevel == LOG_EMERG || loglevel == LOG_ALERT ||
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loglevel == LOG_CRIT || loglevel == LOG_ERR ||
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loglevel == LOG_WARNING || loglevel == LOG_NOTICE ||
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loglevel == LOG_INFO);
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pjdlogv_common(loglevel, 0, -1, fmt, ap);
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}
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/*
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* Regular logs.
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*/
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void
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pjdlog(int loglevel, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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pjdlogv(loglevel, fmt, ap);
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va_end(ap);
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}
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/*
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* Debug logs.
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*/
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void
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pjdlogv_debug(int debuglevel, const char *fmt, va_list ap)
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{
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pjdlogv_common(LOG_DEBUG, debuglevel, -1, fmt, ap);
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}
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/*
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* Debug logs.
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*/
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void
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pjdlog_debug(int debuglevel, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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pjdlogv_debug(debuglevel, fmt, ap);
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va_end(ap);
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}
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/*
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* Error logs with errno logging.
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*/
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void
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pjdlogv_errno(int loglevel, const char *fmt, va_list ap)
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{
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pjdlogv_common(loglevel, 0, errno, fmt, ap);
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}
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/*
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* Error logs with errno logging.
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*/
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void
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pjdlog_errno(int loglevel, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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pjdlogv_errno(loglevel, fmt, ap);
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va_end(ap);
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}
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/*
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* Log error, errno and exit.
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*/
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void
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pjdlogv_exit(int exitcode, const char *fmt, va_list ap)
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{
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pjdlogv_errno(LOG_ERR, fmt, ap);
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exit(exitcode);
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/* NOTREACHED */
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}
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/*
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* Log error, errno and exit.
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*/
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void
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pjdlog_exit(int exitcode, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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pjdlogv_exit(exitcode, fmt, ap);
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/* NOTREACHED */
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va_end(ap);
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}
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/*
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* Log error and exit.
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*/
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void
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pjdlogv_exitx(int exitcode, const char *fmt, va_list ap)
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{
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pjdlogv(LOG_ERR, fmt, ap);
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exit(exitcode);
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/* NOTREACHED */
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}
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/*
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* Log error and exit.
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*/
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void
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pjdlog_exitx(int exitcode, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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pjdlogv_exitx(exitcode, fmt, ap);
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/* NOTREACHED */
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va_end(ap);
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}
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/*
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* Log assertion and exit.
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*/
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void
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pjdlog_verify(const char *func, const char *file, int line,
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const char *failedexpr)
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{
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if (func == NULL) {
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pjdlog_critical("Assertion failed: (%s), file %s, line %d.",
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failedexpr, file, line);
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} else {
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pjdlog_critical("Assertion failed: (%s), function %s, file %s, line %d.",
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failedexpr, func, file, line);
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}
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abort();
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/* NOTREACHED */
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}
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