1 /* Test of sigaction() function.
2 Copyright (C) 2008 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Eric Blake <ebb9@byu.net>, 2008. */
26 #define ASSERT(expr) \
31 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
33 signal (SIGABRT, SIG_DFL); \
40 # define SA_NOCLDSTOP 0
49 # define SA_NOCLDWAIT 0
52 /* Define a mask of flags required by POSIX. Some implementations
53 provide other flags as extensions, such as SA_RESTORER, that we
54 must ignore in this test. */
55 #define MASK_SA_FLAGS (SA_NOCLDSTOP | SA_ONSTACK | SA_RESETHAND | SA_RESTART \
56 | SA_SIGINFO | SA_NOCLDWAIT | SA_NODEFER)
58 /* This test is unsafe in the presence of an asynchronous SIGABRT,
59 because we install a signal-handler that is intentionally not
60 async-safe. Hopefully, this does not lead to too many reports of
61 false failures, since people don't generally use 'kill -s SIGABRT'
62 to end a runaway program. */
67 static int entry_count;
69 ASSERT (sig == SIGABRT);
70 ASSERT (sigaction (SIGABRT, NULL, &sa) == 0);
71 ASSERT ((sa.sa_flags & SA_SIGINFO) == 0);
72 switch (entry_count++)
75 ASSERT ((sa.sa_flags & SA_RESETHAND) == 0);
76 ASSERT (sa.sa_handler == handler);
79 /* This assertion fails on glibc-2.3.6 systems with LinuxThreads,
80 when this program is linked with -lpthread, due to the sigaction()
81 override in libpthread.so. */
82 #if !defined __GLIBC__
83 ASSERT (sa.sa_handler == SIG_DFL);
92 main (int argc, char *argv[])
95 struct sigaction old_sa;
96 sa.sa_handler = handler;
99 ASSERT (sigemptyset (&sa.sa_mask) == 0);
100 ASSERT (sigaction (SIGABRT, &sa, NULL) == 0);
101 ASSERT (raise (SIGABRT) == 0);
103 sa.sa_flags = SA_RESETHAND | SA_NODEFER;
104 ASSERT (sigaction (SIGABRT, &sa, &old_sa) == 0);
105 ASSERT ((old_sa.sa_flags & MASK_SA_FLAGS) == 0);
106 ASSERT (old_sa.sa_handler == handler);
107 ASSERT (raise (SIGABRT) == 0);
109 sa.sa_handler = SIG_DFL;
110 ASSERT (sigaction (SIGABRT, &sa, &old_sa) == 0);
111 ASSERT ((old_sa.sa_flags & SA_SIGINFO) == 0);
112 #if !defined __GLIBC__ /* see above */
113 ASSERT (old_sa.sa_handler == SIG_DFL);
116 sa.sa_handler = SIG_IGN;
117 ASSERT (sigaction (SIGABRT, &sa, NULL) == 0);
118 ASSERT (raise (SIGABRT) == 0);
119 ASSERT (sigaction (SIGABRT, NULL, &old_sa) == 0);
120 ASSERT (old_sa.sa_handler == SIG_IGN);
121 ASSERT (raise (SIGABRT) == 0);