client.c

   1 /*
   2  * Copyright (C) 1997-2007 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file client.c the client program used to connect to para_server */
   8
   9 #include "para.h"
  10 #include "list.h"
  11 #include "sched.h"
  12 #include "client.cmdline.h"
  13 #include "string.h"
  14 #include "stdin.h"
  15 #include "stdout.h"
  16 #include "client.h"
  17 #include "error.h"
  18
  19 INIT_CLIENT_ERRLISTS;
  20
  21 static struct private_client_data *pcd;
  22 static struct stdin_task sit;
  23 static struct stdout_task sot;
  24
  25
  26 INIT_STDERR_LOGGING(pcd->conf.loglevel_arg);
  27
  28 static void client_event_handler(struct task *t)
  29 {
  30         struct private_client_data *p = t->private_data;
  31
  32         PARA_NOTICE_LOG("%s\n", para_strerror(-t->ret));
  33         if (t->ret != -E_HANDSHAKE_COMPLETE) {
  34                 unregister_task(t);
  35                 p->error = t->ret;
  36                 return;
  37         }
  38         if (p->status == CL_SENDING) {
  39                 stdin_set_defaults(&sit);
  40                 sit.buf = para_malloc(sit.bufsize),
  41                 register_task(&sit.task);
  42                 p->inbuf = sit.buf;
  43                 p->in_loaded = &sit.loaded;
  44                 p->in_error = &sit.error;
  45                 return;
  46         }
  47         stdout_set_defaults(&sot);
  48         sot.buf = p->buf;
  49         sot.loaded = &p->loaded;
  50         sot.input_error = &p->error;
  51         register_task(&sot.task);
  52 }
  53
  54 /**
  55  * the client program to connect to para_server
  56  *
  57  * \param argc usual argument count
  58  * \param argv usual argument vector
  59  *
  60  * It registers two tasks: The client task that communicates with para_server
  61  * and the standard out task that writes any output produced by the client task
  62  * to standard out.
  63  *
  64  * \return EXIT_SUCCESS or EXIT_FAILURE
  65  *
  66  * \sa client_open(), stdout.c, stdout.h, para_client(1), para_server(1)
  67  */
  68 int main(int argc, char *argv[])
  69 {
  70
  71         int ret;
  72         struct sched s;
  73
  74         s.default_timeout.tv_sec = 1;
  75         s.default_timeout.tv_usec = 0;
  76         ret = client_open(argc, argv, &pcd);
  77         if (ret < 0) /* can not use PARA_LOG here */
  78                 exit(EXIT_FAILURE);
  79         pcd->task.event_handler = client_event_handler;
  80         ret = schedule(&s);
  81         if (ret < 0)
  82                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
  83         client_close(pcd);
  84         return ret >= 0? EXIT_SUCCESS: EXIT_FAILURE;
  85 }