615 lines
13 KiB
C
615 lines
13 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2009-2010 The FreeBSD Foundation
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* Copyright (c) 2011 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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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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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <assert.h>
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#include <errno.h>
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#include <libutil.h>
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#include <printf.h>
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#include <stdarg.h>
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#include <stdint.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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#define PJDLOG_NEVER_INITIALIZED 0
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#define PJDLOG_NOT_INITIALIZED 1
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#define PJDLOG_INITIALIZED 2
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static int pjdlog_initialized = PJDLOG_NEVER_INITIALIZED;
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static int pjdlog_mode, pjdlog_debug_level;
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static char pjdlog_prefix[128];
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static int
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pjdlog_printf_arginfo_humanized_number(const struct printf_info *pi __unused,
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size_t n, int *argt)
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{
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assert(n >= 1);
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argt[0] = PA_INT | PA_FLAG_INTMAX;
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return (1);
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}
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static int
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pjdlog_printf_render_humanized_number(struct __printf_io *io,
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const struct printf_info *pi, const void * const *arg)
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{
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char buf[5];
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intmax_t num;
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int ret;
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num = *(const intmax_t *)arg[0];
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humanize_number(buf, sizeof(buf), (int64_t)num, "", HN_AUTOSCALE,
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HN_NOSPACE | HN_DECIMAL);
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ret = __printf_out(io, pi, buf, strlen(buf));
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__printf_flush(io);
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return (ret);
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}
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static int
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pjdlog_printf_arginfo_sockaddr(const struct printf_info *pi __unused,
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size_t n, int *argt)
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{
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assert(n >= 1);
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argt[0] = PA_POINTER;
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return (1);
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}
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static int
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pjdlog_printf_render_sockaddr(struct __printf_io *io,
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const struct printf_info *pi, const void * const *arg)
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{
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const struct sockaddr_storage *ss;
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char buf[64];
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int ret;
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ss = *(const struct sockaddr_storage * const *)arg[0];
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switch (ss->ss_family) {
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case AF_INET:
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{
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char addr[INET_ADDRSTRLEN];
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const struct sockaddr_in *sin;
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unsigned int port;
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sin = (const struct sockaddr_in *)ss;
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port = ntohs(sin->sin_port);
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if (inet_ntop(ss->ss_family, &sin->sin_addr, addr,
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sizeof(addr)) == NULL) {
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PJDLOG_ABORT("inet_ntop(AF_INET) failed: %s.",
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strerror(errno));
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}
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snprintf(buf, sizeof(buf), "%s:%u", addr, port);
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break;
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}
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case AF_INET6:
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{
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char addr[INET6_ADDRSTRLEN];
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const struct sockaddr_in6 *sin;
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unsigned int port;
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sin = (const struct sockaddr_in6 *)ss;
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port = ntohs(sin->sin6_port);
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if (inet_ntop(ss->ss_family, &sin->sin6_addr, addr,
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sizeof(addr)) == NULL) {
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PJDLOG_ABORT("inet_ntop(AF_INET6) failed: %s.",
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strerror(errno));
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}
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snprintf(buf, sizeof(buf), "[%s]:%u", addr, port);
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break;
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}
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default:
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snprintf(buf, sizeof(buf), "[unsupported family %hhu]",
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ss->ss_family);
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break;
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}
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ret = __printf_out(io, pi, buf, strlen(buf));
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__printf_flush(io);
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return (ret);
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}
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void
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pjdlog_init(int mode)
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{
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int saved_errno;
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assert(pjdlog_initialized == PJDLOG_NEVER_INITIALIZED ||
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pjdlog_initialized == PJDLOG_NOT_INITIALIZED);
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assert(mode == PJDLOG_MODE_STD || mode == PJDLOG_MODE_SYSLOG);
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saved_errno = errno;
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if (pjdlog_initialized == PJDLOG_NEVER_INITIALIZED) {
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__use_xprintf = 1;
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register_printf_render_std("T");
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register_printf_render('N',
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pjdlog_printf_render_humanized_number,
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pjdlog_printf_arginfo_humanized_number);
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register_printf_render('S',
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pjdlog_printf_render_sockaddr,
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pjdlog_printf_arginfo_sockaddr);
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}
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if (mode == PJDLOG_MODE_SYSLOG)
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openlog(NULL, LOG_PID | LOG_NDELAY, LOG_DAEMON);
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pjdlog_mode = mode;
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pjdlog_debug_level = 0;
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bzero(pjdlog_prefix, sizeof(pjdlog_prefix));
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pjdlog_initialized = PJDLOG_INITIALIZED;
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errno = saved_errno;
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}
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void
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pjdlog_fini(void)
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{
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int saved_errno;
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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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saved_errno = errno;
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if (pjdlog_mode == PJDLOG_MODE_SYSLOG)
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closelog();
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pjdlog_initialized = PJDLOG_NOT_INITIALIZED;
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errno = saved_errno;
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}
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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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int saved_errno;
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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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assert(mode == PJDLOG_MODE_STD || mode == PJDLOG_MODE_SYSLOG);
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if (pjdlog_mode == mode)
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return;
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saved_errno = errno;
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if (mode == PJDLOG_MODE_SYSLOG)
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openlog(NULL, LOG_PID | LOG_NDELAY, LOG_DAEMON);
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else /* if (mode == PJDLOG_MODE_STD) */
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closelog();
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pjdlog_mode = mode;
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errno = saved_errno;
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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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(pjdlog_initialized == PJDLOG_INITIALIZED);
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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va_start(ap, fmt);
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pjdlogv_prefix_set(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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pjdlogv_prefix_set(const char *fmt, va_list ap)
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{
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int saved_errno;
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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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assert(fmt != NULL);
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saved_errno = errno;
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vsnprintf(pjdlog_prefix, sizeof(pjdlog_prefix), fmt, ap);
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errno = saved_errno;
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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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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int saved_errno;
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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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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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saved_errno = errno;
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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, " %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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fflush(out);
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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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errno = saved_errno;
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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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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assert(pjdlog_initialized == PJDLOG_INITIALIZED);
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|
|
|
va_start(ap, fmt);
|
|
pjdlogv_exitx(exitcode, fmt, ap);
|
|
/* NOTREACHED */
|
|
va_end(ap);
|
|
}
|
|
|
|
/*
|
|
* Log failure message and exit.
|
|
*/
|
|
void
|
|
pjdlog_abort(const char *func, const char *file, int line,
|
|
const char *failedexpr, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
|
|
|
|
/*
|
|
* When there is no message we pass __func__ as 'fmt'.
|
|
* It would be cleaner to pass NULL or "", but gcc generates a warning
|
|
* for both of those.
|
|
*/
|
|
if (fmt != func) {
|
|
va_start(ap, fmt);
|
|
pjdlogv_critical(fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
if (failedexpr == NULL) {
|
|
if (func == NULL) {
|
|
pjdlog_critical("Aborted at file %s, line %d.", file,
|
|
line);
|
|
} else {
|
|
pjdlog_critical("Aborted at function %s, file %s, line %d.",
|
|
func, file, line);
|
|
}
|
|
} else {
|
|
if (func == NULL) {
|
|
pjdlog_critical("Assertion failed: (%s), file %s, line %d.",
|
|
failedexpr, file, line);
|
|
} else {
|
|
pjdlog_critical("Assertion failed: (%s), function %s, file %s, line %d.",
|
|
failedexpr, func, file, line);
|
|
}
|
|
}
|
|
abort();
|
|
}
|