1 /* Child program invoked by test-execute-main.
2 Copyright (C) 2009-2021 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 /* If the user's config.h happens to include <sys/stat.h>, let it include only
18 the system's <sys/stat.h> here. */
19 #define __need_system_sys_stat_h
20 #include <config.h>
21
22 /* Get the original definition of fstat. It might be defined as a macro.
23 Also, 'stat' might be defined as a macro. */
24 #include <sys/types.h>
25 #include <sys/stat.h>
26 #undef __need_system_sys_stat_h
27
28 /* Return non-zero if FD is opened to a device. */
29 static int
30 is_device (int fd)
31 {
32 #if defined _WIN32 && ! defined __CYGWIN__
33 struct _stat st;
34 return _fstat (fd, &st) >= 0 && !((st.st_mode & S_IFMT) == S_IFREG);
35 #else
36 struct stat st;
37 return fstat (fd, &st) >= 0 && !S_ISREG (st.st_mode);
38 #endif
39 }
40
41 /* Now include the other header files. */
42 #include <fcntl.h>
43 #include <signal.h>
44 #include <stdint.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <unistd.h>
49
50 #if defined _WIN32 && ! defined __CYGWIN__
51 /* Get declarations of the native Windows API functions. */
52 # define WIN32_LEAN_AND_MEAN
53 # include <windows.h>
54 /* Get _get_osfhandle, _isatty, _chdir, _getcwd. */
55 # include <io.h>
56 #endif
57
58 /* In this file, we use only system functions, no overrides from gnulib. */
59 #undef atoi
60 #undef fcntl
61 #undef fflush
62 #undef fgetc
63 #undef fprintf
64 #undef fputs
65 #undef getcwd
66 #undef isatty
67 #undef raise
68 #undef read
69 #undef sprintf
70 #undef strcmp
71 #undef strlen
72 #undef write
73
74 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER
75 static void __cdecl
76 gl_msvc_invalid_parameter_handler (const wchar_t *expression,
77 const wchar_t *function,
78 const wchar_t *file,
79 unsigned int line,
80 uintptr_t dummy)
81 {
82 }
83 #endif
84
85 /* Return non-zero if FD is open. */
86 static int
87 is_open (int fd)
88 {
89 #if defined _WIN32 && ! defined __CYGWIN__
90 /* On native Windows, the initial state of unassigned standard file
91 descriptors is that they are open but point to an
92 INVALID_HANDLE_VALUE, and there is no fcntl. */
93 return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
94 #else
95 # ifndef F_GETFL
96 # error Please port fcntl to your platform
97 # endif
98 return 0 <= fcntl (fd, F_GETFL);
99 #endif
100 }
101
102 int
103 main (int argc, char *argv[])
104 {
105 if (argc == 1)
106 /* Check an invocation without arguments. Check the exit code. */
107 return 40;
108
109 int test = atoi (argv[1]);
110 switch (test)
111 {
112 case 2:
113 /* Check argument passing. */
114 return !(argc == 12
115 && strcmp (argv[2], "abc def") == 0
116 && strcmp (argv[3], "abc\"def\"ghi") == 0
117 && strcmp (argv[4], "xyz\"") == 0
118 && strcmp (argv[5], "abc\\def\\ghi") == 0
119 && strcmp (argv[6], "xyz\\") == 0
120 && strcmp (argv[7], "???") == 0
121 && strcmp (argv[8], "***") == 0
122 && strcmp (argv[9], "") == 0
123 && strcmp (argv[10], "foo") == 0
124 && strcmp (argv[11], "") == 0);
125 #if !(defined _WIN32 && !defined __CYGWIN__)
126 case 3:
127 /* Check SIGPIPE handling with ignore_sigpipe = false. */
128 case 4:
129 /* Check SIGPIPE handling with ignore_sigpipe = true. */
130 raise (SIGPIPE);
131 return 71;
132 #endif
133 case 5:
134 /* Check other signal. */
135 raise (SIGINT);
136 return 71;
137 case 6:
138 /* Check stdin is inherited. */
139 return !(fgetc (stdin) == 'F' && fgetc (stdin) == 'o');
140 case 7:
141 /* Check null_stdin = true. */
142 return !(fgetc (stdin) == EOF);
143 case 8:
144 /* Check stdout is inherited, part 1 (regular file). */
145 return !(fputs ("bar", stdout) != EOF && fflush (stdout) == 0);
146 case 9:
147 /* Check stdout is inherited, part 2 (device). */
148 case 10:
149 /* Check null_stdout = true. */
150 return !is_device (STDOUT_FILENO);
151 case 11:
152 /* Check stderr is inherited, part 1 (regular file). */
153 return !(fputs ("bar", stderr) != EOF && fflush (stderr) == 0);
154 case 12:
155 /* Check stderr is inherited, part 2 (device). */
156 case 13:
157 /* Check null_stderr = true. */
158 return !is_device (STDERR_FILENO);
159 case 14:
160 case 15:
161 /* Check file descriptors >= 3 can be inherited. */
162 case 16:
163 /* Check file descriptors >= 3 with O_CLOEXEC bit are not inherited. */
164 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER
165 /* Avoid exceptions from within _get_osfhandle. */
166 _set_invalid_parameter_handler (gl_msvc_invalid_parameter_handler);
167 #endif
168 {
169 char buf[300];
170 buf[0] = '\0';
171 char *p = buf;
172 int fd;
173 for (fd = 0; fd < 20; fd++)
174 if (is_open (fd))
175 {
176 sprintf (p, "%d ", fd);
177 p += strlen (p);
178 }
179 const char *expected = (test < 16 ? "0 1 2 10 " : "0 1 2 ");
180 if (strcmp (buf, expected) == 0)
181 return 0;
182 else
183 {
184 fprintf (stderr, "Test case %d: %s\n", test, buf); fflush (stderr);
185 return 1;
186 }
187 }
188 case 17:
189 /* Check that file descriptors >= 3, open for reading, can be inherited,
190 including the file position. */
191 {
192 char buf[6];
193 int n = read (10, buf, sizeof (buf));
194 return !(n == 4 && memcmp (buf, "obar", 4) == 0);
195 }
196 case 18:
197 /* Check that file descriptors >= 3, open for writing, can be inherited,
198 including the file position. */
199 {
200 int n = write (10, "bar", 3);
201 return !(n == 3);
202 }
203 case 19:
204 /* Check that file descriptors >= 3, when inherited, preserve their
205 isatty() property, part 1 (regular file). */
206 case 20:
207 /* Check that file descriptors >= 3, when inherited, preserve their
208 isatty() property, part 2 (character devices). */
209 {
210 #if defined _WIN32 && ! defined __CYGWIN__
211 return 4 + 2 * (_isatty (10) != 0) + (_isatty (11) != 0);
212 #else
213 return 4 + 2 * (isatty (10) != 0) + (isatty (11) != 0);
214 #endif
215 }
216 case 21:
217 /* Check execution in a different directory. */
218 {
219 char cwd[1024];
220 #if defined _WIN32 && ! defined __CYGWIN__
221 if (_chdir ("..") != 0)
222 return 1;
223 if (_getcwd (cwd, sizeof (cwd)) == NULL)
224 return 2;
225 #else
226 if (chdir ("..") != 0)
227 return 1;
228 if (getcwd (cwd, sizeof (cwd)) == NULL)
229 return 2;
230 #endif
231 return (argc == 3 && strcmp (argv[2], cwd) == 0 ? 0 : 3);
232 }
233 default:
234 abort ();
235 }
236 }