src/log_worker.c

   1 /*  Log worker of GNU Thales.  Copyright (C)
   2 2012 Free Software Foundation, Inc.  This file is part of GNU Thales.
   3
   4 GNU Thales is free software; you can redistribute it and/or modify it under the
   5 terms of the GNU General Public License as published by the Free Software
   6 Foundation; either version 3 of the License, or (at your option) any later
   7 version.
   8
   9 GNU Make is distributed in the hope that it will be useful, but
  10 WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License along with
  15 this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16 #include "log_worker.h"
  17 #include <stdlib.h>
  18
  19 #include "xalloc.h"
  20
  21 struct log_worker {
  22   struct worker worker;
  23   FILE  *out_stream;
  24 };
  25
  26 static char *
  27 log_worker_process_message(const char *msg, struct irc_meta *meta,
  28                            struct worker *embed, const char *name)
  29 {
  30   struct log_worker *logger = worker_entry(embed, struct log_worker, worker);
  31   FILE *stream = logger->out_stream ? logger->out_stream : stdout;
  32
  33   fprintf(stream, "[%s]: %s\n", name, msg);
  34   return NULL;
  35 }
  36
  37 static void
  38 log_worker_free_worker(struct worker *embed)
  39 {
  40   struct log_worker *logger = worker_entry(embed, struct log_worker, worker);
  41
  42   if (logger->out_stream)
  43     fclose(logger->out_stream);
  44   free(logger);
  45 }
  46
  47 struct worker*
  48 create_log_worker(const struct envz *env)
  49 {
  50   struct log_worker *logger;
  51   const char *output_filename = envz_get(env->envz, env->envz_len, "output");
  52   FILE *out_stream = NULL;
  53   if (output_filename && !(out_stream = fopen(output_filename, "a"))) {
  54     fprintf(stderr, "log worker:  specified file `%s' can not be appended\n",
  55             output_filename);
  56     return NULL;
  57   }
  58
  59   logger = xmalloc(sizeof *logger);
  60   logger->out_stream = out_stream;
  61   return &logger->worker;
  62 }