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76a50749 | 1 | /* Thread calls exec. |
581c785b | 2 | Copyright (C) 2002-2022 Free Software Foundation, Inc. |
76a50749 | 3 | This file is part of the GNU C Library. |
76a50749 UD |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
76a50749 UD |
18 | |
19 | #include <errno.h> | |
20 | #include <paths.h> | |
21 | #include <pthread.h> | |
22 | #include <signal.h> | |
23 | #include <spawn.h> | |
24 | #include <stdbool.h> | |
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
27 | #include <unistd.h> | |
28 | #include <sys/wait.h> | |
02802faf | 29 | #include <support/xsignal.h> |
76a50749 UD |
30 | |
31 | ||
32 | static void * | |
33 | tf (void *arg) | |
34 | { | |
35 | execl (_PATH_BSHELL, _PATH_BSHELL, "-c", "echo $$", NULL); | |
36 | ||
37 | puts ("execl failed"); | |
38 | exit (1); | |
39 | } | |
40 | ||
41 | ||
42 | static int | |
43 | do_test (void) | |
44 | { | |
45 | int fd[2]; | |
46 | if (pipe (fd) != 0) | |
47 | { | |
48 | puts ("pipe failed"); | |
49 | exit (1); | |
50 | } | |
51 | ||
52 | /* Not interested in knowing when the pipe is closed. */ | |
02802faf | 53 | xsignal (SIGPIPE, SIG_IGN); |
76a50749 UD |
54 | |
55 | pid_t pid = fork (); | |
56 | if (pid == -1) | |
57 | { | |
58 | puts ("fork failed"); | |
59 | exit (1); | |
60 | } | |
61 | ||
62 | if (pid == 0) | |
63 | { | |
64 | /* Use the fd for stdout. This is kind of ugly because it | |
65 | substitutes the fd of stdout but we know what we are doing | |
66 | here... */ | |
67 | if (dup2 (fd[1], STDOUT_FILENO) != STDOUT_FILENO) | |
68 | { | |
69 | puts ("dup2 failed"); | |
70 | exit (1); | |
71 | } | |
72 | ||
73 | close (fd[0]); | |
74 | ||
75 | pthread_t th; | |
76 | if (pthread_create (&th, NULL, tf, NULL) != 0) | |
77 | { | |
78 | puts ("create failed"); | |
79 | exit (1); | |
80 | } | |
81 | ||
82 | if (pthread_join (th, NULL) == 0) | |
83 | { | |
84 | puts ("join succeeded!?"); | |
85 | exit (1); | |
86 | } | |
87 | ||
88 | puts ("join returned!?"); | |
89 | exit (1); | |
90 | } | |
91 | ||
92 | close (fd[1]); | |
93 | ||
94 | char buf[200]; | |
95 | ssize_t n; | |
96 | bool seen_pid = false; | |
97 | while (TEMP_FAILURE_RETRY ((n = read (fd[0], buf, sizeof (buf)))) > 0) | |
98 | { | |
99 | /* We only expect to read the PID. */ | |
100 | char *endp; | |
101 | long int rpid = strtol (buf, &endp, 10); | |
102 | ||
103 | if (*endp != '\n') | |
104 | { | |
105 | printf ("didn't parse whole line: \"%s\"\n", buf); | |
106 | exit (1); | |
107 | } | |
108 | if (endp == buf) | |
109 | { | |
110 | puts ("read empty line"); | |
111 | exit (1); | |
112 | } | |
113 | ||
114 | if (rpid != pid) | |
115 | { | |
116 | printf ("found \"%s\", expected PID %ld\n", buf, (long int) pid); | |
117 | exit (1); | |
118 | } | |
119 | ||
120 | if (seen_pid) | |
121 | { | |
122 | puts ("found more than one PID line"); | |
123 | exit (1); | |
124 | } | |
125 | seen_pid = true; | |
126 | } | |
127 | ||
128 | close (fd[0]); | |
129 | ||
130 | int status; | |
131 | int err = waitpid (pid, &status, 0); | |
132 | if (err != pid) | |
133 | { | |
134 | puts ("waitpid failed"); | |
135 | exit (1); | |
136 | } | |
137 | ||
138 | if (!seen_pid) | |
139 | { | |
140 | puts ("didn't get PID"); | |
141 | exit (1); | |
142 | } | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | #define TEST_FUNCTION do_test () | |
148 | #include "../test-skeleton.c" |