1 /*
2 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "tests.h"
29 #include <assert.h>
30 #include <stdio.h>
31 #include <string.h>
32 #include <unistd.h>
33 #include <sys/wait.h>
34
35 static inline int
logit_(const char * const str)36 logit_(const char *const str)
37 {
38 return !chdir(str);
39 }
40
41 #define prefix "fork-f."
42 #define logit(arg) logit_(prefix arg)
43
main(int ac,char ** av)44 int main(int ac, char **av)
45 {
46 if (ac < 1)
47 return 1;
48 if (ac > 1)
49 return logit("exec");
50
51 logit("start");
52
53 int child_wait_fds[2];
54 (void) close(0);
55 if (pipe(child_wait_fds))
56 perror_msg_and_fail("pipe");
57
58 pid_t pid = fork();
59
60 if (pid < 0)
61 perror_msg_and_fail("fork");
62
63 if (!pid) {
64 close(child_wait_fds[1]);
65
66 if (read(0, child_wait_fds, sizeof(int)))
67 _exit(2);
68
69 char *const args[] = { av[0], (char *) "", NULL };
70 if (logit("child") || execve(args[0], args, args + 1))
71 _exit(2);
72 }
73
74 close(0);
75
76 logit("parent");
77 close(child_wait_fds[1]);
78
79 int status;
80 assert(wait(&status) == pid);
81 assert(status == 0);
82
83 pid_t ppid = getpid();
84 logit("finish");
85
86 printf("%-5d chdir(\"%sstart\") = -1 ENOENT (%m)\n"
87 "%-5d chdir(\"%sparent\") = -1 ENOENT (%m)\n"
88 "%-5d chdir(\"%schild\") = -1 ENOENT (%m)\n"
89 "%-5d chdir(\"%sexec\") = -1 ENOENT (%m)\n"
90 "%-5d chdir(\"%sfinish\") = -1 ENOENT (%m)\n",
91 ppid, prefix,
92 ppid, prefix,
93 pid, prefix,
94 pid, prefix,
95 ppid, prefix);
96 return 0;
97 }
98