expl: Work around inaccurate implementation on NetBSD.
[gnulib.git] / tests / test-pipe-filter-gi2-main.c
blob94a2b05b5f68e5fa700bc51c8fc89e1fbdec4970
1 /* Test harness for pipe-filter-gi.
3 Copyright (C) 2009-2019 Free Software Foundation, Inc.
4 Written by Paolo Bonzini <bonzini@gnu.org>, 2009.
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.
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.
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/>. */
19 #include <config.h>
21 #include "pipe-filter.h"
23 #include <stdio.h>
24 #include <errno.h>
25 #include <unistd.h>
26 #include <string.h>
27 #include <signal.h>
29 #include "full-write.h"
30 #include "macros.h"
32 /* 0.1 sec pause */
33 static void
34 small_nap (void)
36 usleep (100000);
39 static char static_buf[5];
41 static void *
42 prepare_read (size_t *num_bytes_p, void *private_data)
44 *num_bytes_p = sizeof (static_buf);
45 return static_buf;
48 /* Callback that ignores the data that has been read. */
50 static void
51 ignore_done_read (void *data_read, size_t num_bytes_read, void *private_data)
55 /* Callback that outputs the data that has been read. */
57 static void
58 output_done_read (void *data_read, size_t num_bytes_read, void *private_data)
60 full_write (STDOUT_FILENO, data_read, num_bytes_read);
63 static void
64 pipe_filter_gi_write_string (struct pipe_filter_gi *f, const char *string)
66 pipe_filter_gi_write (f, string, strlen (string));
69 int
70 main (int argc, char **argv)
72 struct pipe_filter_gi *f;
73 const char *path[] = { NULL, NULL };
75 ASSERT (argc == 2);
77 /* Test writing to a nonexistent program traps sooner or later. */
79 int rc;
81 path[0] = "/nonexistent/blah";
82 f = pipe_filter_gi_create ("pipe-filter-test", path[0], path, true, false,
83 prepare_read, ignore_done_read, NULL);
84 small_nap ();
85 rc = pipe_filter_gi_write (f, "", 1);
86 ASSERT (rc == 127 || rc == -1);
87 rc = pipe_filter_gi_close (f);
88 ASSERT (rc == 127 || rc == -1);
89 printf ("Test 1 passed.\n");
90 fflush (stdout);
93 /* Test returning the exit status. */
95 path[0] = argv[1];
96 f = pipe_filter_gi_create ("pipe-filter-test", path[0], path, false, false,
97 prepare_read, ignore_done_read, NULL);
98 pipe_filter_gi_write_string (f, "1 -1");
99 ASSERT (pipe_filter_gi_close (f) == 1);
100 printf ("Test 2 passed.\n");
101 fflush (stdout);
104 /* Same, but test returning the status in pipe_filter_gi_write. */
106 int rc;
108 path[0] = argv[1];
109 f = pipe_filter_gi_create ("pipe-filter-test", path[0], path, false, false,
110 prepare_read, ignore_done_read, NULL);
111 pipe_filter_gi_write_string (f, "1 -1\n"); /* tell the child to terminate */
112 small_nap (); /* let the child terminate */
113 rc = pipe_filter_gi_write (f, " ", 1); /* write to a closed pipe */
114 ASSERT (rc == -1 && errno == EPIPE);
115 /* Closing the filter must report same error again, for consistency with
116 pipe_filter_ii_execute. The subprocess' exit status is not returned. */
117 rc = pipe_filter_gi_close (f);
118 ASSERT (rc == -1 && errno == EPIPE);
119 printf ("Test 3 passed.\n");
120 fflush (stdout);
123 /* Now test asynchronous I/O. */
125 path[0] = argv[1];
126 f = pipe_filter_gi_create ("pipe-filter-test", path[0], path, false, true,
127 prepare_read, output_done_read, NULL);
128 pipe_filter_gi_write_string (f, "1 50\n");
129 pipe_filter_gi_write_string (f, "51\n");
130 pipe_filter_gi_write_string (f, "100");
131 ASSERT (pipe_filter_gi_close (f) == 0);
132 printf ("Test 4 passed.\n");
133 fflush (stdout);
136 return 0;