lib/libalpm/log.c

   1 /*
   2  *  log.c
   3  *
   4  *  Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19  *  USA.
  20  */
  21
  22 #include "config.h"
  23
  24 #include <stdio.h>
  25 #include <stdarg.h>
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <errno.h>
  29 #include <time.h>
  30
  31 /* libalpm */
  32 #include "log.h"
  33 #include "handle.h"
  34 #include "util.h"
  35 #include "error.h"
  36 #include "alpm.h"
  37
  38 /** \addtogroup alpm_log Logging Functions
  39  * @brief Functions to log using libalpm
  40  * @{
  41  */
  42
  43 /** A printf-like function for logging.
  44  * @param fmt output format
  45  * @return 0 on success, -1 on error (pm_errno is set accordingly)
  46  */
  47 int SYMEXPORT alpm_logaction(char *fmt, ...)
  48 {
  49         int ret;
  50         va_list args;
  51
  52         ALPM_LOG_FUNC;
  53
  54         /* Sanity checks */
  55         ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
  56
  57         /* check if the logstream is open already, opening it if needed */
  58         if(handle->logstream == NULL) {
  59                 handle->logstream = fopen(handle->logfile, "a");
  60                 /* if we couldn't open it, we have an issue */
  61                 if(handle->logstream == NULL) {
  62                         if(errno == EACCES) {
  63                                 pm_errno = PM_ERR_BADPERMS;
  64                         } else if(errno == ENOENT) {
  65                                 pm_errno = PM_ERR_NOT_A_DIR;
  66                         } else {
  67                                 pm_errno = PM_ERR_SYSTEM;
  68                         }
  69                 return(-1);
  70                 }
  71         }
  72
  73         va_start(args, fmt);
  74         ret = _alpm_logaction(handle->usesyslog, handle->logstream, fmt, args);
  75         va_end(args);
  76
  77         /* TODO We should add a prefix to log strings depending on who called us.
  78          * If logaction was called by the frontend:
  79          *   USER: <the frontend log>
  80          * and if called internally:
  81          *   ALPM: <the library log>
  82          * Moreover, the frontend should be able to choose its prefix
  83          * (USER by default?):
  84          *   pacman: "PACMAN"
  85          *   kpacman: "KPACMAN"
  86          * This would allow us to share the log file between several frontends
  87          * and know who does what */
  88         return(ret);
  89 }
  90
  91 /** @} */
  92
  93 void _alpm_log(pmloglevel_t flag, char *fmt, ...)
  94 {
  95         va_list args;
  96         alpm_cb_log logcb = alpm_option_get_logcb();
  97
  98         if(logcb == NULL) {
  99                 return;
 100         }
 101
 102         va_start(args, fmt);
 103         logcb(flag, fmt, args);
 104         va_end(args);
 105 }
 106
 107 /* vim: set ts=2 sw=2 noet: */