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/*
* log.c
*
* Copyright (c) 2006-2013 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>
/* libalpm */
#include "log.h"
#include "handle.h"
#include "util.h"
#include "alpm.h"
/** \addtogroup alpm_log Logging Functions
* @brief Functions to log using libalpm
* @{
*/
/** A printf-like function for logging.
* @param handle the context handle
* @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 *fmt, ...)
{
int ret;
va_list args;
ASSERT(handle != NULL, return -1);
/* check if the logstream is open already, opening it if needed */
if(handle->logstream == NULL) {
handle->logstream = fopen(handle->logfile, "a");
/* if we couldn't open it, we have an issue */
if(handle->logstream == 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;
}
return -1;
}
}
va_start(args, fmt);
ret = _alpm_logaction(handle, fmt, args);
va_end(args);
/* TODO We should add a prefix to log strings depending on who called us.
* If logaction was called by the frontend:
* USER: <the frontend log>
* and if called internally:
* ALPM: <the library log>
* Moreover, the frontend should be able to choose its prefix
* (USER by default?):
* pacman: "PACMAN"
* kpacman: "KPACMAN"
* This would allow us to share the log file between several frontends
* and know who does what */
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);
}
/* vim: set ts=2 sw=2 noet: */
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