1 | /* Copyright (C) 2017-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library 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 GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <unistd.h> |
19 | #include <errno.h> |
20 | #include <fcntl.h> |
21 | #include <sys/wait.h> |
22 | |
23 | #include <support/check.h> |
24 | |
25 | /* Try executing "/bin/sh -c true", using FD opened on /bin/sh. */ |
26 | static int |
27 | try_fexecve (int fd) |
28 | { |
29 | pid_t pid = fork (); |
30 | |
31 | if (pid == 0) |
32 | { |
33 | static const char *const argv[] = { |
34 | "/bin/sh" , "-c" , "true" , NULL |
35 | }; |
36 | fexecve (fd: fd, argv: (char *const *) argv, envp: environ); |
37 | _exit (errno); |
38 | } |
39 | if (pid < 0) |
40 | FAIL_RET ("fork failed: %m" ); |
41 | |
42 | pid_t termpid; |
43 | int status; |
44 | termpid = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)); |
45 | if (termpid == -1) |
46 | FAIL_RET ("waitpid failed: %m" ); |
47 | if (termpid != pid) |
48 | FAIL_RET ("waitpid returned %ld != %ld" , |
49 | (long int) termpid, (long int) pid); |
50 | if (!WIFEXITED (status)) |
51 | FAIL_RET ("child hasn't exited normally" ); |
52 | |
53 | /* If fexecve is unimplemented mark this test as UNSUPPORTED. */ |
54 | if (WEXITSTATUS (status) == ENOSYS) |
55 | FAIL_UNSUPPORTED ("fexecve is unimplemented" ); |
56 | |
57 | if (WEXITSTATUS (status) != 0) |
58 | { |
59 | errno = WEXITSTATUS (status); |
60 | FAIL_RET ("fexecve failed: %m" ); |
61 | } |
62 | return 0; |
63 | } |
64 | |
65 | static int |
66 | do_test (void) |
67 | { |
68 | int fd; |
69 | int ret; |
70 | |
71 | fd = open (file: "/bin/sh" , O_RDONLY); |
72 | if (fd < 0) |
73 | FAIL_UNSUPPORTED ("/bin/sh cannot be opened: %m" ); |
74 | ret = try_fexecve (fd); |
75 | close (fd: fd); |
76 | |
77 | #ifdef O_PATH |
78 | fd = open (file: "/bin/sh" , O_RDONLY | O_PATH); |
79 | if (fd < 0) |
80 | FAIL_UNSUPPORTED ("/bin/sh cannot be opened (O_PATH): %m" ); |
81 | ret |= try_fexecve (fd); |
82 | close (fd: fd); |
83 | #endif |
84 | |
85 | return ret; |
86 | } |
87 | |
88 | #include <support/test-driver.c> |
89 | |