1 | /* Thread calls exec. |
2 | Copyright (C) 2002-2024 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
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 |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
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> |
29 | #include <support/xsignal.h> |
30 | |
31 | |
32 | static void * |
33 | tf (void *arg) |
34 | { |
35 | execl (_PATH_BSHELL, _PATH_BSHELL, "-c" , "echo $$" , NULL); |
36 | |
37 | puts (s: "execl failed" ); |
38 | exit (1); |
39 | } |
40 | |
41 | |
42 | static int |
43 | do_test (void) |
44 | { |
45 | int fd[2]; |
46 | if (pipe (pipedes: fd) != 0) |
47 | { |
48 | puts (s: "pipe failed" ); |
49 | exit (1); |
50 | } |
51 | |
52 | /* Not interested in knowing when the pipe is closed. */ |
53 | xsignal (SIGPIPE, SIG_IGN); |
54 | |
55 | pid_t pid = fork (); |
56 | if (pid == -1) |
57 | { |
58 | puts (s: "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: fd[1], STDOUT_FILENO) != STDOUT_FILENO) |
68 | { |
69 | puts (s: "dup2 failed" ); |
70 | exit (1); |
71 | } |
72 | |
73 | close (fd: fd[0]); |
74 | |
75 | pthread_t th; |
76 | if (pthread_create (newthread: &th, NULL, start_routine: tf, NULL) != 0) |
77 | { |
78 | puts (s: "create failed" ); |
79 | exit (1); |
80 | } |
81 | |
82 | if (pthread_join (th: th, NULL) == 0) |
83 | { |
84 | puts (s: "join succeeded!?" ); |
85 | exit (1); |
86 | } |
87 | |
88 | puts (s: "join returned!?" ); |
89 | exit (1); |
90 | } |
91 | |
92 | close (fd: 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 (format: "didn't parse whole line: \"%s\"\n" , buf); |
106 | exit (1); |
107 | } |
108 | if (endp == buf) |
109 | { |
110 | puts (s: "read empty line" ); |
111 | exit (1); |
112 | } |
113 | |
114 | if (rpid != pid) |
115 | { |
116 | printf (format: "found \"%s\", expected PID %ld\n" , buf, (long int) pid); |
117 | exit (1); |
118 | } |
119 | |
120 | if (seen_pid) |
121 | { |
122 | puts (s: "found more than one PID line" ); |
123 | exit (1); |
124 | } |
125 | seen_pid = true; |
126 | } |
127 | |
128 | close (fd: fd[0]); |
129 | |
130 | int status; |
131 | int err = waitpid (pid: pid, stat_loc: &status, options: 0); |
132 | if (err != pid) |
133 | { |
134 | puts (s: "waitpid failed" ); |
135 | exit (1); |
136 | } |
137 | |
138 | if (!seen_pid) |
139 | { |
140 | puts (s: "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" |
149 | |