1/* Signal handler and mask set in thread which calls exec.
2 Copyright (C) 2003-2022 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 <pthread.h>
20#include <signal.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <unistd.h>
24#include <support/xsignal.h>
25
26static void *
27tf (void *arg)
28{
29 /* Ignore SIGUSR1 and block SIGUSR2. */
30 xsignal (SIGUSR1, SIG_IGN);
31
32 sigset_t ss;
33 sigemptyset (&ss);
34 sigaddset (&ss, SIGUSR2);
35 if (pthread_sigmask (SIG_BLOCK, newmask: &ss, NULL) != 0)
36 {
37 puts (s: "1st run: sigmask failed");
38 exit (1);
39 }
40
41 char **oldargv = (char **) arg;
42 size_t n = 1;
43 while (oldargv[n] != NULL)
44 ++n;
45
46 char **argv = (char **) alloca ((n + 1) * sizeof (char *));
47 for (n = 0; oldargv[n + 1] != NULL; ++n)
48 argv[n] = oldargv[n + 1];
49 argv[n++] = (char *) "--direct";
50 argv[n] = NULL;
51
52 execv (path: argv[0], argv: argv);
53
54 puts (s: "execv failed");
55
56 exit (1);
57}
58
59
60static int
61do_test (int argc, char *argv[])
62{
63 if (argc == 1)
64 {
65 /* This is the second call. Perform the test. */
66 struct sigaction sa;
67
68 if (sigaction (SIGUSR1, NULL, oact: &sa) != 0)
69 {
70 puts (s: "2nd run: sigaction failed");
71 return 1;
72 }
73 if (sa.sa_handler != SIG_IGN)
74 {
75 puts (s: "SIGUSR1 not ignored");
76 return 1;
77 }
78
79 sigset_t ss;
80 if (pthread_sigmask (SIG_SETMASK, NULL, oldmask: &ss) != 0)
81 {
82 puts (s: "2nd run: sigmask failed");
83 return 1;
84 }
85 if (! sigismember (&ss, SIGUSR2))
86 {
87 puts (s: "SIGUSR2 not blocked");
88 return 1;
89 }
90
91 return 0;
92 }
93
94 pthread_t th;
95 if (pthread_create (newthread: &th, NULL, start_routine: tf, arg: argv) != 0)
96 {
97 puts (s: "create failed");
98 exit (1);
99 }
100
101 /* This call should never return. */
102 pthread_join (th: th, NULL);
103
104 puts (s: "join returned");
105
106 return 1;
107}
108
109#define TEST_FUNCTION do_test (argc, argv)
110#include "../test-skeleton.c"
111

source code of glibc/nptl/tst-exec4.c