recv.c

   1 /*
   2  * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     This program is distributed in the hope that it will be useful,
  10  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *     GNU General Public License for more details.
  13  *
  14  *     You should have received a copy of the GNU General Public License
  15  *     along with this program; if not, write to the Free Software
  16  *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  17  */
  18
  19 /** \file recv.c the stand-alone receiver */
  20
  21 #include "para.h"
  22
  23 #include "list.h"
  24 #include "sched.h"
  25 #include "recv.h"
  26 #include "recv.cmdline.h"
  27 #include "fd.h"
  28 #include "error.h"
  29 #include "stdout.h"
  30
  31 struct recv_args_info conf;
  32
  33 INIT_RECV_ERRLISTS;
  34
  35
  36 INIT_STDERR_LOGGING(conf.loglevel_arg);
  37 static void *parse_config(int argc, char *argv[], int *receiver_num)
  38 {
  39         int i;
  40
  41         if (recv_cmdline_parser(argc, argv, &conf))
  42                 return NULL;
  43         if (conf.list_receivers_given) {
  44                 printf("available receivers: ");
  45                 for (i = 0; receivers[i].name; i++)
  46                         printf("%s%s", i? " " : "", receivers[i].name);
  47                 printf("\nTry\n\tpara_recv -r '<receivername> -h'\n"
  48                         "for help on <receivername>.\n");
  49                 exit(EXIT_SUCCESS);
  50         }
  51         return check_receiver_arg(conf.receiver_arg, receiver_num);
  52 }
  53
  54 static void rn_event_handler(struct task *t)
  55 {
  56         struct receiver_node *rn = t->private_data;
  57         PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
  58         rn->eof = 1;
  59         unregister_task(t);
  60 }
  61
  62 int main(int argc, char *argv[])
  63 {
  64         int ret, r_opened = 0, receiver_num;
  65         struct  receiver *r = NULL;
  66         struct receiver_node rn;
  67         struct stdout_task sot;
  68         struct sched s;
  69
  70         s.default_timeout.tv_sec = 1;
  71         s.default_timeout.tv_usec = 0;
  72
  73         memset(&rn, 0, sizeof(struct receiver_node));
  74         for (ret = 0; receivers[ret].name; ret++)
  75                 receivers[ret].init(&receivers[ret]);
  76         ret = -E_RECV_SYNTAX;
  77         rn.conf = parse_config(argc, argv, &receiver_num);
  78         if (!rn.conf) {
  79                 PARA_EMERG_LOG("%s", "parse failed\n");
  80                 goto out;
  81         }
  82         r = &receivers[receiver_num];
  83         rn.receiver = r;
  84         ret = r->open(&rn);
  85         if (ret < 0)
  86                 goto out;
  87         r_opened = 1;
  88
  89         stdout_set_defaults(&sot);
  90         sot.buf = rn.buf;
  91         sot.loaded = &rn.loaded;
  92         sot.input_eof = &rn.eof;
  93         register_task(&sot.task);
  94
  95         rn.task.private_data = &rn;
  96         rn.task.pre_select = r->pre_select;
  97         rn.task.post_select = r->post_select;
  98         rn.task.event_handler = rn_event_handler;
  99         sprintf(rn.task.status, "receiver node");
 100         register_task(&rn.task);
 101
 102         ret = sched(&s);
 103 out:
 104         if (r_opened)
 105                 r->close(&rn);
 106         if (r)
 107                 r->shutdown();
 108         if (ret < 0)
 109                 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
 110         return ret;
 111 }