root/maint/gnulib/tests/test-pipe-filter-ii2-main.c

/* */

DEFINITIONS

1. prepare_write
2. done_write
3. prepare_read
4. ignore_done_read
5. output_done_read
6. main

   1 /* Test harness for pipe-filter-ii.
   2 
   3    Copyright (C) 2009-2021 Free Software Foundation, Inc.
   4    Written by Paolo Bonzini <bonzini@gnu.org>, 2009.
   5 
   6    This program is free software: you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10 
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15 
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  18 
  19 #include <config.h>
  20 
  21 #include "pipe-filter.h"
  22 
  23 #include <stdio.h>
  24 #include <errno.h>
  25 #include <unistd.h>
  26 #include <string.h>
  27 #include <signal.h>
  28 
  29 #include "binary-io.h"
  30 #include "full-write.h"
  31 #include "macros.h"
  32 
  33 struct locals
  34 {
  35   const char *input;
  36   size_t size;
  37   size_t nwritten;
  38   size_t nread;
  39   char buf[5];
  40 };
  41 
  42 static const void *
  43 prepare_write (size_t *num_bytes_p, void *private_data)
     /*  */
  44 {
  45   struct locals *l = (struct locals *) private_data;
  46   if (l->nwritten < l->size)
  47     {
  48       *num_bytes_p = l->size - l->nwritten;
  49       return l->input + l->nwritten;
  50     }
  51   else
  52     return NULL;
  53 }
  54 
  55 static void
  56 done_write (void *data_written, size_t num_bytes_written, void *private_data)
     /*  */
  57 {
  58   struct locals *l = (struct locals *) private_data;
  59   l->nwritten += num_bytes_written;
  60 }
  61 
  62 static void *
  63 prepare_read (size_t *num_bytes_p, void *private_data)
     /*  */
  64 {
  65   struct locals *l = (struct locals *) private_data;
  66   *num_bytes_p = sizeof (l->buf);
  67   return l->buf;
  68 }
  69 
  70 /* Callback that ignores the data that has been read.  */
  71 
  72 static void
  73 ignore_done_read (void *data_read, size_t num_bytes_read, void *private_data)
     /*  */
  74 {
  75 }
  76 
  77 /* Callback that outputs the data that has been read.  */
  78 
  79 static void
  80 output_done_read (void *data_read, size_t num_bytes_read, void *private_data)
     /*  */
  81 {
  82   full_write (STDOUT_FILENO, data_read, num_bytes_read);
  83 }
  84 
  85 int
  86 main (int argc, char **argv)
     /*  */
  87 {
  88   const char *path[] = { NULL, NULL };
  89 
  90   ASSERT (argc == 2);
  91 
  92   set_binary_mode (STDOUT_FILENO, O_BINARY);
  93 
  94   /* Test writing to a nonexistent program traps sooner or later.  */
  95   {
  96     struct locals l;
  97     int rc;
  98 
  99     l.input = "";
 100     l.size = 1;
 101     l.nwritten = 0;
 102     l.nread = 0;
 103     path[0] = "/nonexistent/blah";
 104     rc = pipe_filter_ii_execute ("pipe-filter-test", path[0], path, true, false,
 105                                  prepare_write, done_write,
 106                                  prepare_read, ignore_done_read,
 107                                  &l);
 108     ASSERT (rc == 127 || rc == -1);
 109     printf ("Test 1 passed.\n");
 110     fflush (stdout);
 111   }
 112 
 113   /* Test returning the exit status.  */
 114   {
 115     struct locals l;
 116     int rc;
 117 
 118     l.input = "1 -1";
 119     l.size = strlen (l.input);
 120     l.nwritten = 0;
 121     l.nread = 0;
 122     path[0] = argv[1];
 123     rc = pipe_filter_ii_execute ("pipe-filter-test", path[0], path, false, false,
 124                                  prepare_write, done_write,
 125                                  prepare_read, ignore_done_read,
 126                                  &l);
 127     ASSERT (rc == 1);
 128     printf ("Test 2 passed.\n");
 129     fflush (stdout);
 130   }
 131 
 132   /* Now test asynchronous I/O.  */
 133   {
 134     struct locals l;
 135     int rc;
 136 
 137     l.input = "1 50\n51\n100";
 138     l.size = strlen (l.input);
 139     l.nwritten = 0;
 140     l.nread = 0;
 141     path[0] = argv[1];
 142     rc = pipe_filter_ii_execute ("pipe-filter-test", path[0], path, false, true,
 143                                  prepare_write, done_write,
 144                                  prepare_read, output_done_read,
 145                                  &l);
 146     ASSERT (rc == 0);
 147     printf ("Test 3 passed.\n");
 148     fflush (stdout);
 149   }
 150 
 151   return 0;
 152 }

/* */