126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
/*
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* log.c
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*
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* Copyright (c) 2006-2016 Pacman Development Team <pacman-dev@archlinux.org>
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* Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <syslog.h>
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/* libalpm */
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#include "log.h"
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#include "handle.h"
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#include "util.h"
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#include "alpm.h"
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/** \addtogroup alpm_log Logging Functions
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* @brief Functions to log using libalpm
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* @{
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*/
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static int _alpm_log_leader(FILE *f, const char *prefix)
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{
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time_t t = time(NULL);
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struct tm *tm = localtime(&t);
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/* Use ISO-8601 date format */
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return fprintf(f, "[%04d-%02d-%02d %02d:%02d] [%s] ",
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tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
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tm->tm_hour, tm->tm_min, prefix);
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}
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/** A printf-like function for logging.
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* @param handle the context handle
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* @param prefix caller-specific prefix for the log
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* @param fmt output format
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* @return 0 on success, -1 on error (pm_errno is set accordingly)
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*/
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int SYMEXPORT alpm_logaction(alpm_handle_t *handle, const char *prefix,
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const char *fmt, ...)
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{
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int ret = 0;
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va_list args;
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ASSERT(handle != NULL, return -1);
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if(!(prefix && *prefix)) {
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prefix = "UNKNOWN";
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}
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/* check if the logstream is open already, opening it if needed */
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if(handle->logstream == NULL && handle->logfile != NULL) {
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int fd;
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do {
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fd = open(handle->logfile, O_WRONLY | O_APPEND | O_CREAT | O_CLOEXEC,
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0644);
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} while(fd == -1 && errno == EINTR);
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/* if we couldn't open it, we have an issue */
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if(fd < 0 || (handle->logstream = fdopen(fd, "a")) == NULL) {
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if(errno == EACCES) {
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handle->pm_errno = ALPM_ERR_BADPERMS;
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} else if(errno == ENOENT) {
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handle->pm_errno = ALPM_ERR_NOT_A_DIR;
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} else {
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handle->pm_errno = ALPM_ERR_SYSTEM;
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}
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ret = -1;
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}
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}
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va_start(args, fmt);
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if(handle->usesyslog) {
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/* we can't use a va_list more than once, so we need to copy it
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* so we can use the original when calling vfprintf below. */
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va_list args_syslog;
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va_copy(args_syslog, args);
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vsyslog(LOG_WARNING, fmt, args_syslog);
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va_end(args_syslog);
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}
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if(handle->logstream) {
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if(_alpm_log_leader(handle->logstream, prefix) < 0
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|| vfprintf(handle->logstream, fmt, args) < 0) {
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ret = -1;
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handle->pm_errno = ALPM_ERR_SYSTEM;
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}
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fflush(handle->logstream);
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}
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va_end(args);
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return ret;
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}
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/** @} */
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void _alpm_log(alpm_handle_t *handle, alpm_loglevel_t flag, const char *fmt, ...)
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{
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va_list args;
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if(handle == NULL || handle->logcb == NULL) {
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return;
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}
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va_start(args, fmt);
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handle->logcb(flag, fmt, args);
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va_end(args);
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}
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/* vim: set noet: */
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