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 <regex.h>
  10 #include <openssl/rc4.h>
  11
  12 #include "para.h"
  13 #include "list.h"
  14 #include "sched.h"
  15 #include "crypt.h"
  16 #include "client.cmdline.h"
  17 #include "string.h"
  18 #include "stdin.h"
  19 #include "stdout.h"
  20 #include "client.h"
  21 #include "error.h"
  22
  23 INIT_CLIENT_ERRLISTS;
  24
  25 static struct client_task *ct;
  26 static struct stdin_task sit;
  27 static struct stdout_task sot;
  28
  29 static void supervisor_post_select(__a_unused struct sched *s, struct task *t)
  30 {
  31         if (ct->task.error < 0) {
  32                 t->error = ct->task.error;
  33                 return;
  34         }
  35         if (ct->status == CL_SENDING) {
  36                 stdin_set_defaults(&sit);
  37                 sit.buf = para_malloc(sit.bufsize),
  38                 register_task(&sit.task);
  39                 ct->inbuf = sit.buf;
  40                 ct->in_loaded = &sit.loaded;
  41                 ct->in_error = &sit.task.error;
  42                 t->error = -E_TASK_STARTED;
  43                 return;
  44         }
  45         if (ct->status == CL_RECEIVING) {
  46                 stdout_set_defaults(&sot);
  47                 sot.bufp = &ct->buf;
  48                 sot.loaded = &ct->loaded;
  49                 sot.input_error = &ct->task.error;
  50                 register_task(&sot.task);
  51                 t->error = -E_TASK_STARTED;
  52                 return;
  53         }
  54 }
  55
  56 static struct task svt = {
  57         .post_select = supervisor_post_select,
  58         .status = "supervisor task"
  59 };
  60
  61 static int client_loglevel; /* loglevel */
  62 INIT_STDERR_LOGGING(client_loglevel);
  63
  64
  65 /**
  66  * The client program to connect to para_server.
  67  *
  68  * \param argc Usual argument count.
  69  * \param argv Usual argument vector.
  70  *
  71  * It registers two tasks: The client task that communicates with para_server
  72  * and the standard out task that writes any output produced by the client task
  73  * to standard out.
  74  *
  75  * \return EXIT_SUCCESS or EXIT_FAILURE
  76  *
  77  * \sa client_open(), stdout.c, stdout.h, para_client(1), para_server(1)
  78  */
  79 int main(int argc, char *argv[])
  80 {
  81
  82         int ret;
  83         static struct sched s;
  84
  85         s.default_timeout.tv_sec = 1;
  86         s.default_timeout.tv_usec = 0;
  87         ret = client_open(argc, argv, &ct, &client_loglevel);
  88         if (ret < 0) /* can not use PARA_LOG here because ct is NULL */
  89                 exit(EXIT_FAILURE);
  90         register_task(&svt);
  91         ret = schedule(&s);
  92         if (ret < 0)
  93                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
  94         client_close(ct);
  95         return ret >= 0? EXIT_SUCCESS: EXIT_FAILURE;
  96 }