tests/test-pipe-filter-gi2-main.c

   1 /* Test harness for pipe-filter-gi.
   2
   3    Copyright (C) 2009-2024 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 /* 0.1 sec pause */
  34 static void
  35 small_nap (void)
  36 {
  37   usleep (100000);
  38 }
  39
  40 static char static_buf[5];
  41
  42 static void *
  43 prepare_read (size_t *num_bytes_p, void *private_data)
  44 {
  45   *num_bytes_p = sizeof (static_buf);
  46   return static_buf;
  47 }
  48
  49 /* Callback that ignores the data that has been read.  */
  50
  51 static void
  52 ignore_done_read (void *data_read, size_t num_bytes_read, void *private_data)
  53 {
  54 }
  55
  56 /* Callback that outputs the data that has been read.  */
  57
  58 static void
  59 output_done_read (void *data_read, size_t num_bytes_read, void *private_data)
  60 {
  61   full_write (STDOUT_FILENO, data_read, num_bytes_read);
  62 }
  63
  64 static void
  65 pipe_filter_gi_write_string (struct pipe_filter_gi *f, const char *string)
  66 {
  67   pipe_filter_gi_write (f, string, strlen (string));
  68 }
  69
  70 int
  71 main (int argc, char **argv)
  72 {
  73   struct pipe_filter_gi *f;
  74   const char *path[] = { NULL, NULL };
  75
  76   ASSERT (argc == 2);
  77
  78   set_binary_mode (STDOUT_FILENO, O_BINARY);
  79
  80   /* Test writing to a nonexistent program traps sooner or later.  */
  81   {
  82     int rc;
  83
  84     path[0] = "/nonexistent/blah";
  85     f = pipe_filter_gi_create ("pipe-filter-test", path[0], path, true, false,
  86                                prepare_read, ignore_done_read, NULL);
  87     small_nap ();
  88     rc = pipe_filter_gi_write (f, "", 1);
  89     ASSERT (rc == 127 || rc == -1);
  90     rc = pipe_filter_gi_close (f);
  91     ASSERT (rc == 127 || rc == -1);
  92     printf ("Test 1 passed.\n");
  93     fflush (stdout);
  94   }
  95
  96   /* Test returning the exit status.  */
  97   {
  98     path[0] = argv[1];
  99     f = pipe_filter_gi_create ("pipe-filter-test", path[0], path, false, false,
 100                                prepare_read, ignore_done_read, NULL);
 101     pipe_filter_gi_write_string (f, "1 -1");
 102     ASSERT (pipe_filter_gi_close (f) == 1);
 103     printf ("Test 2 passed.\n");
 104     fflush (stdout);
 105   }
 106
 107   /* Same, but test returning the status in pipe_filter_gi_write.  */
 108   {
 109     int rc;
 110
 111     path[0] = argv[1];
 112     f = pipe_filter_gi_create ("pipe-filter-test", path[0], path, false, false,
 113                                prepare_read, ignore_done_read, NULL);
 114     pipe_filter_gi_write_string (f, "1 -1\n"); /* tell the child to terminate */
 115     small_nap (); /* let the child terminate */
 116     rc = pipe_filter_gi_write (f, " ", 1); /* write to a closed pipe */
 117     ASSERT (rc == -1 && errno == EPIPE);
 118     /* Closing the filter must report same error again, for consistency with
 119        pipe_filter_ii_execute.  The subprocess' exit status is not returned.  */
 120     rc = pipe_filter_gi_close (f);
 121     ASSERT (rc == -1 && errno == EPIPE);
 122     printf ("Test 3 passed.\n");
 123     fflush (stdout);
 124   }
 125
 126   /* Now test asynchronous I/O.  */
 127   {
 128     path[0] = argv[1];
 129     f = pipe_filter_gi_create ("pipe-filter-test", path[0], path, false, true,
 130                                prepare_read, output_done_read, NULL);
 131     pipe_filter_gi_write_string (f, "1 50\n");
 132     pipe_filter_gi_write_string (f, "51\n");
 133     pipe_filter_gi_write_string (f, "100");
 134     ASSERT (pipe_filter_gi_close (f) == 0);
 135     printf ("Test 4 passed.\n");
 136     fflush (stdout);
 137   }
 138
 139   return test_exit_status;
 140 }