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/*
* log.c
*
* Copyright (c) 2006-2020 Pacman Development Team <pacman-dev@archlinux.org>
* Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdarg.h>
#include <errno.h>
#include <syslog.h>
#include <time.h>
/* libalpm */
#include "log.h"
#include "handle.h"
#include "util.h"
#include "alpm.h"
/** \addtogroup alpm_log Logging Functions
* @brief Functions to log using libalpm
* @{
*/
static int _alpm_log_leader(FILE *f, const char *prefix)
{
time_t t = time(NULL);
struct tm *tm = localtime(&t);
int length = 32;
char timestamp[length];
/* Use ISO-8601 date format */
strftime(timestamp,length,"%FT%T%z", tm);
return fprintf(f, "[%s] [%s] ", timestamp, prefix);
}
/** A printf-like function for logging.
* @param handle the context handle
* @param prefix caller-specific prefix for the log
* @param fmt output format
* @return 0 on success, -1 on error (pm_errno is set accordingly)
*/
int SYMEXPORT alpm_logaction(alpm_handle_t *handle, const char *prefix,
const char *fmt, ...)
{
int ret = 0;
va_list args;
ASSERT(handle != NULL, return -1);
if(!(prefix && *prefix)) {
prefix = "UNKNOWN";
}
/* check if the logstream is open already, opening it if needed */
if(handle->logstream == NULL && handle->logfile != NULL) {
int fd;
do {
fd = open(handle->logfile, O_WRONLY | O_APPEND | O_CREAT | O_CLOEXEC,
0644);
} while(fd == -1 && errno == EINTR);
/* if we couldn't open it, we have an issue */
if(fd < 0 || (handle->logstream = fdopen(fd, "a")) == NULL) {
if(errno == EACCES) {
handle->pm_errno = ALPM_ERR_BADPERMS;
} else if(errno == ENOENT) {
handle->pm_errno = ALPM_ERR_NOT_A_DIR;
} else {
handle->pm_errno = ALPM_ERR_SYSTEM;
}
ret = -1;
}
}
va_start(args, fmt);
if(handle->usesyslog) {
/* we can't use a va_list more than once, so we need to copy it
* so we can use the original when calling vfprintf below. */
va_list args_syslog;
va_copy(args_syslog, args);
vsyslog(LOG_WARNING, fmt, args_syslog);
va_end(args_syslog);
}
if(handle->logstream) {
if(_alpm_log_leader(handle->logstream, prefix) < 0
|| vfprintf(handle->logstream, fmt, args) < 0) {
ret = -1;
handle->pm_errno = ALPM_ERR_SYSTEM;
}
fflush(handle->logstream);
}
va_end(args);
return ret;
}
/** @} */
void _alpm_log(alpm_handle_t *handle, alpm_loglevel_t flag, const char *fmt, ...)
{
va_list args;
if(handle == NULL || handle->logcb == NULL) {
return;
}
va_start(args, fmt);
handle->logcb(flag, fmt, args);
va_end(args);
}
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