client.c

   1 /*
   2  * Copyright (C) 1997-2009 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 <openssl/rc4.h>
  10
  11 #include "para.h"
  12 #include "list.h"
  13 #include "sched.h"
  14 #include "crypt.h"
  15 #include "client.cmdline.h"
  16 #include "string.h"
  17 #include "stdin.h"
  18 #include "stdout.h"
  19 #include "client.h"
  20 #include "error.h"
  21
  22 INIT_CLIENT_ERRLISTS;
  23
  24 static struct client_task *ct;
  25 static struct stdin_task sit;
  26 static struct stdout_task sot;
  27
  28 static void supervisor_post_select(__a_unused struct sched *s, struct task *t)
  29 {
  30         if (ct->task.error < 0) {
  31                 t->error = ct->task.error;
  32                 return;
  33         }
  34         if (ct->status == CL_SENDING) {
  35                 stdin_set_defaults(&sit);
  36                 sit.buf = para_malloc(sit.bufsize),
  37                 register_task(&sit.task);
  38                 ct->inbuf = sit.buf;
  39                 ct->in_loaded = &sit.loaded;
  40                 ct->in_error = &sit.task.error;
  41                 t->error = -E_TASK_STARTED;
  42                 return;
  43         }
  44         if (ct->status == CL_RECEIVING) {
  45                 stdout_set_defaults(&sot);
  46                 sot.bufp = &ct->buf;
  47                 sot.loaded = &ct->loaded;
  48                 sot.input_error = &ct->task.error;
  49                 register_task(&sot.task);
  50                 t->error = -E_TASK_STARTED;
  51                 return;
  52         }
  53 }
  54
  55 static struct task svt = {
  56         .post_select = supervisor_post_select,
  57         .status = "supervisor task"
  58 };
  59
  60 static int client_loglevel; /* loglevel */
  61 INIT_STDERR_LOGGING(client_loglevel);
  62
  63
  64 /**
  65  * The client program to connect to para_server.
  66  *
  67  * \param argc Usual argument count.
  68  * \param argv Usual argument vector.
  69  *
  70  * It registers two tasks: The client task that communicates with para_server
  71  * and the standard out task that writes any output produced by the client task
  72  * to standard out.
  73  *
  74  * \return EXIT_SUCCESS or EXIT_FAILURE
  75  *
  76  * \sa client_open(), stdout.c, stdout.h, para_client(1), para_server(1)
  77  */
  78 int main(int argc, char *argv[])
  79 {
  80
  81         int ret;
  82         static struct sched s;
  83
  84         s.default_timeout.tv_sec = 1;
  85         s.default_timeout.tv_usec = 0;
  86         ret = client_open(argc, argv, &ct, &client_loglevel);
  87         if (ret < 0) /* can not use PARA_LOG here because ct is NULL */
  88                 exit(EXIT_FAILURE);
  89         register_task(&svt);
  90         ret = schedule(&s);
  91         if (ret < 0)
  92                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
  93         client_close(ct);
  94         return ret >= 0? EXIT_SUCCESS: EXIT_FAILURE;
  95 }