1 /* Test of posix_spawnp() function.
2 Copyright (C) 2020-2021 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, see <https://www.gnu.org/licenses/>. */
16
17 #include <config.h>
18
19 #include <spawn.h>
20
21 #include <errno.h>
22 #include <fcntl.h>
23 #include <stdio.h>
24 #include <string.h>
25 #include <unistd.h>
26 #include <sys/types.h>
27 #include <sys/wait.h>
28
29 #include "macros.h"
30
31 #define DATA_FILENAME "test-posix_spawn-script.tmp"
32
33 int
main()34 main ()
35 {
36 unlink (DATA_FILENAME);
37
38 /* Check an invocation of an executable script.
39 This should only be supported if the script has a '#!' marker; otherwise
40 it is unsecure: <https://sourceware.org/bugzilla/show_bug.cgi?id=13134>.
41 POSIX says that the execlp() and execvp() functions support executing
42 shell scripts
43 <https://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html>,
44 but this is considered an antiquated feature. */
45 pid_t child;
46
47 posix_spawn_file_actions_t actions;
48 ASSERT (posix_spawn_file_actions_init (&actions) == 0);
49 ASSERT (posix_spawn_file_actions_addopen (&actions, STDOUT_FILENO,
50 DATA_FILENAME,
51 O_RDWR | O_CREAT | O_TRUNC, 0600)
52 == 0);
53
54 {
55 size_t i;
56
57 for (i = 0; i < 2; i++)
58 {
59 const char *prog_path =
60 (i == 0 ? SRCDIR "executable-script" : SRCDIR "executable-script.sh");
61 const char *prog_argv[2] = { prog_path, NULL };
62
63 int err = posix_spawnp (&child, prog_path, &actions, NULL,
64 (char **) prog_argv, environ);
65 if (err != ENOEXEC)
66 {
67 if (err != 0)
68 {
69 errno = err;
70 perror ("posix_spawn");
71 return 1;
72 }
73
74 /* Wait for child. */
75 int status = 0;
76 while (waitpid (child, &status, 0) != child)
77 ;
78 if (!WIFEXITED (status))
79 {
80 fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status);
81 return 1;
82 }
83 int exitstatus = WEXITSTATUS (status);
84 if (exitstatus != 127)
85 {
86 fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus);
87 return 1;
88 }
89 }
90 }
91 }
92
93 #if defined _WIN32 && !defined __CYGWIN__
94 /* On native Windows, scripts - even with '#!' marker - are not executable.
95 Only .bat and .cmd files are. */
96 fprintf (stderr, "Skipping test: scripts are not executable on this platform.\n");
97 return 77;
98 #else
99 {
100 const char *prog_path = SRCDIR "executable-shell-script";
101 const char *prog_argv[2] = { prog_path, NULL };
102
103 int err = posix_spawnp (&child, prog_path, &actions, NULL,
104 (char **) prog_argv, environ);
105 if (err != 0)
106 {
107 errno = err;
108 perror ("posix_spawn");
109 return 1;
110 }
111
112 posix_spawn_file_actions_destroy (&actions);
113
114 /* Wait for child. */
115 int status = 0;
116 while (waitpid (child, &status, 0) != child)
117 ;
118 if (!WIFEXITED (status))
119 {
120 fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status);
121 return 1;
122 }
123 int exitstatus = WEXITSTATUS (status);
124 if (exitstatus != 0)
125 {
126 fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus);
127 return 1;
128 }
129
130 /* Check the contents of the data file. */
131 FILE *fp = fopen (DATA_FILENAME, "rb");
132 if (fp == NULL)
133 {
134 perror ("cannot open data file");
135 return 1;
136 }
137 char buf[1024];
138 int nread = fread (buf, 1, sizeof (buf), fp);
139 if (!(nread == 11 && memcmp (buf, "Halle Potta", 11) == 0))
140 {
141 fprintf (stderr, "data file wrong: has %d bytes, expected %d bytes\n", nread, 11);
142 return 1;
143 }
144 if (fclose (fp))
145 {
146 perror ("cannot close data file");
147 return 1;
148 }
149 }
150 #endif
151
152 /* Clean up data file. */
153 unlink (DATA_FILENAME);
154
155 return 0;
156 }
157