lib/libalpm/log.c


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/*
 *  log.c
 * 
 *  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, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 
 *  USA.
 */

#include "config.h"

#include <stdio.h>
#include <stdarg.h>
#include <time.h>

/* libalpm */
#include "log.h"
#include "handle.h"
#include "util.h"
#include "error.h"
#include "alpm.h"

/** \addtogroup alpm_log Logging Functions
 * @brief Functions to log using libalpm
 * @{
 */

/** A printf-like function for logging.
 * @param fmt output format
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int SYMEXPORT alpm_logaction(char *fmt, ...)
{
  char str[LOG_STR_LEN];
  va_list args;

  ALPM_LOG_FUNC;

  /* Sanity checks */
  ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));

  va_start(args, fmt);
  vsnprintf(str, LOG_STR_LEN, 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(_alpm_logaction(handle->usesyslog, handle->logfd, str));
}

/** @} */

void _alpm_log(pmloglevel_t flag, char *fmt, ...)
{
  alpm_cb_log logcb = alpm_option_get_logcb();
  if(logcb == NULL) {
    return;
  }

  if(flag & alpm_option_get_logmask()) {
    char str[LOG_STR_LEN];
    va_list args;

    va_start(args, fmt);
    vsnprintf(str, LOG_STR_LEN, fmt, args);
    va_end(args);

    logcb(flag, str);
  }
}

/* vim: set ts=2 sw=2 noet: */