client.c

   1 /*
   2  * Copyright (C) 1997-2007 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 client.c the client program used to connect to para_server */
  20
  21 #include "para.h"
  22 #include "list.h"
  23 #include "sched.h"
  24 #include "client.cmdline.h"
  25 #include "string.h"
  26 #include "stdin.h"
  27 #include "stdout.h"
  28 #include "client.h"
  29 #include "error.h"
  30
  31 INIT_CLIENT_ERRLISTS;
  32
  33 static struct private_client_data *pcd;
  34 static struct stdin_task sit;
  35 static struct stdout_task sot;
  36
  37
  38 INIT_STDERR_LOGGING(pcd->conf.loglevel_arg);
  39
  40 static void client_event_handler(struct task *t)
  41 {
  42         struct private_client_data *p = t->private_data;
  43
  44         PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
  45         if (t->ret != -E_HANDSHAKE_COMPLETE) {
  46                 unregister_task(t);
  47                 p->eof = 1;
  48                 return;
  49         }
  50         if (p->status == CL_SENDING) {
  51                 stdin_set_defaults(&sit);
  52                 sit.buf = para_malloc(sit.bufsize),
  53                 register_task(&sit.task);
  54                 p->inbuf = sit.buf;
  55                 p->in_loaded = &sit.loaded;
  56                 p->in_eof = &sit.eof;
  57                 return;
  58         }
  59         stdout_set_defaults(&sot);
  60         sot.buf = p->buf;
  61         sot.loaded = &p->loaded;
  62         sot.input_eof = &p->eof;
  63         register_task(&sot.task);
  64 }
  65
  66 /**
  67  * the client program to connect to para_server
  68  *
  69  * \param argc usual argument count
  70  * \param argv usual argument vector
  71  *
  72  * It registers two tasks: The client task that communicates with para_server
  73  * and the standard out task that writes any output produced by the client task
  74  * to standard out.
  75  *
  76  * \return EXIT_SUCCESS or EXIT_FAILURE
  77  *
  78  * \sa client_open(), stdout.c, stdout.h, para_client(1), para_server(1)
  79  */
  80 int main(int argc, char *argv[])
  81 {
  82
  83         int ret;
  84         struct sched s;
  85
  86         s.default_timeout.tv_sec = 1;
  87         s.default_timeout.tv_usec = 0;
  88         ret = client_open(argc, argv, &pcd);
  89         if (ret < 0) /* can not use PARA_LOG here */
  90                 exit(EXIT_FAILURE);
  91         pcd->task.event_handler = client_event_handler;
  92         ret = sched(&s);
  93         if (ret < 0)
  94                 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
  95         client_close(pcd);
  96         return ret >= 0? EXIT_SUCCESS: EXIT_FAILURE;
  97 }