1 | /* Thread with running 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 | pthread_t th = (pthread_t) arg; |
36 | |
37 | if (pthread_join (th: th, NULL) == 0) |
38 | { |
39 | puts (s: "thread in parent joined!?" ); |
40 | exit (1); |
41 | } |
42 | |
43 | puts (s: "join in thread in parent returned!?" ); |
44 | exit (1); |
45 | } |
46 | |
47 | |
48 | static int |
49 | do_test (void) |
50 | { |
51 | int fd[2]; |
52 | if (pipe (pipedes: fd) != 0) |
53 | { |
54 | puts (s: "pipe failed" ); |
55 | exit (1); |
56 | } |
57 | |
58 | /* Not interested in knowing when the pipe is closed. */ |
59 | xsignal (SIGPIPE, SIG_IGN); |
60 | |
61 | pid_t pid = fork (); |
62 | if (pid == -1) |
63 | { |
64 | puts (s: "fork failed" ); |
65 | exit (1); |
66 | } |
67 | |
68 | if (pid == 0) |
69 | { |
70 | /* Use the fd for stdout. This is kind of ugly because it |
71 | substitutes the fd of stdout but we know what we are doing |
72 | here... */ |
73 | if (dup2 (fd: fd[1], STDOUT_FILENO) != STDOUT_FILENO) |
74 | { |
75 | puts (s: "dup2 failed" ); |
76 | exit (1); |
77 | } |
78 | |
79 | close (fd: fd[0]); |
80 | |
81 | pthread_t th; |
82 | if (pthread_create (newthread: &th, NULL, start_routine: tf, arg: (void *) pthread_self ()) != 0) |
83 | { |
84 | puts (s: "create failed" ); |
85 | exit (1); |
86 | } |
87 | |
88 | execl (_PATH_BSHELL, _PATH_BSHELL, "-c" , "echo $$" , NULL); |
89 | |
90 | puts (s: "execl failed" ); |
91 | exit (1); |
92 | } |
93 | |
94 | close (fd: fd[1]); |
95 | |
96 | char buf[200]; |
97 | ssize_t n; |
98 | bool seen_pid = false; |
99 | while (TEMP_FAILURE_RETRY ((n = read (fd[0], buf, sizeof (buf)))) > 0) |
100 | { |
101 | /* We only expect to read the PID. */ |
102 | char *endp; |
103 | long int rpid = strtol (buf, &endp, 10); |
104 | |
105 | if (*endp != '\n') |
106 | { |
107 | printf (format: "didn't parse whole line: \"%s\"\n" , buf); |
108 | exit (1); |
109 | } |
110 | if (endp == buf) |
111 | { |
112 | puts (s: "read empty line" ); |
113 | exit (1); |
114 | } |
115 | |
116 | if (rpid != pid) |
117 | { |
118 | printf (format: "found \"%s\", expected PID %ld\n" , buf, (long int) pid); |
119 | exit (1); |
120 | } |
121 | |
122 | if (seen_pid) |
123 | { |
124 | puts (s: "found more than one PID line" ); |
125 | exit (1); |
126 | } |
127 | seen_pid = true; |
128 | } |
129 | |
130 | close (fd: fd[0]); |
131 | |
132 | int status; |
133 | int err = waitpid (pid: pid, stat_loc: &status, options: 0); |
134 | if (err != pid) |
135 | { |
136 | puts (s: "waitpid failed" ); |
137 | exit (1); |
138 | } |
139 | |
140 | if (!seen_pid) |
141 | { |
142 | puts (s: "didn't get PID" ); |
143 | exit (1); |
144 | } |
145 | |
146 | return 0; |
147 | } |
148 | |
149 | #define TEST_FUNCTION do_test () |
150 | #include "../test-skeleton.c" |
151 | |