125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/* Test of sigaction() function.
|
|
Copyright (C) 2008 Free Software Foundation, Inc.
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
/* Written by Eric Blake <ebb9@byu.net>, 2008. */
|
|
|
|
#include <config.h>
|
|
|
|
#include <signal.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#define ASSERT(expr) \
|
|
do \
|
|
{ \
|
|
if (!(expr)) \
|
|
{ \
|
|
fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
|
|
fflush (stderr); \
|
|
signal (SIGABRT, SIG_DFL); \
|
|
abort (); \
|
|
} \
|
|
} \
|
|
while (0)
|
|
|
|
#ifndef SA_NOCLDSTOP
|
|
# define SA_NOCLDSTOP 0
|
|
#endif
|
|
#ifndef SA_ONSTACK
|
|
# define SA_ONSTACK 0
|
|
#endif
|
|
#ifndef SA_SIGINFO
|
|
# define SA_SIGINFO 0
|
|
#endif
|
|
#ifndef SA_NOCLDWAIT
|
|
# define SA_NOCLDWAIT 0
|
|
#endif
|
|
|
|
/* Define a mask of flags required by POSIX. Some implementations
|
|
provide other flags as extensions, such as SA_RESTORER, that we
|
|
must ignore in this test. */
|
|
#define MASK_SA_FLAGS (SA_NOCLDSTOP | SA_ONSTACK | SA_RESETHAND | SA_RESTART \
|
|
| SA_SIGINFO | SA_NOCLDWAIT | SA_NODEFER)
|
|
|
|
/* This test is unsafe in the presence of an asynchronous SIGABRT,
|
|
because we install a signal-handler that is intentionally not
|
|
async-safe. Hopefully, this does not lead to too many reports of
|
|
false failures, since people don't generally use 'kill -s SIGABRT'
|
|
to end a runaway program. */
|
|
|
|
static void
|
|
handler (int sig)
|
|
{
|
|
static int entry_count;
|
|
struct sigaction sa;
|
|
ASSERT (sig == SIGABRT);
|
|
ASSERT (sigaction (SIGABRT, NULL, &sa) == 0);
|
|
ASSERT ((sa.sa_flags & SA_SIGINFO) == 0);
|
|
switch (entry_count++)
|
|
{
|
|
case 0:
|
|
ASSERT ((sa.sa_flags & SA_RESETHAND) == 0);
|
|
ASSERT (sa.sa_handler == handler);
|
|
break;
|
|
case 1:
|
|
/* This assertion fails on glibc-2.3.6 systems with LinuxThreads,
|
|
when this program is linked with -lpthread, due to the sigaction()
|
|
override in libpthread.so. */
|
|
#if !defined __GLIBC__
|
|
ASSERT (sa.sa_handler == SIG_DFL);
|
|
#endif
|
|
break;
|
|
default:
|
|
ASSERT (0);
|
|
}
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
struct sigaction sa;
|
|
struct sigaction old_sa;
|
|
sa.sa_handler = handler;
|
|
|
|
sa.sa_flags = 0;
|
|
ASSERT (sigemptyset (&sa.sa_mask) == 0);
|
|
ASSERT (sigaction (SIGABRT, &sa, NULL) == 0);
|
|
ASSERT (raise (SIGABRT) == 0);
|
|
|
|
sa.sa_flags = SA_RESETHAND | SA_NODEFER;
|
|
ASSERT (sigaction (SIGABRT, &sa, &old_sa) == 0);
|
|
ASSERT ((old_sa.sa_flags & MASK_SA_FLAGS) == 0);
|
|
ASSERT (old_sa.sa_handler == handler);
|
|
ASSERT (raise (SIGABRT) == 0);
|
|
|
|
sa.sa_handler = SIG_DFL;
|
|
ASSERT (sigaction (SIGABRT, &sa, &old_sa) == 0);
|
|
ASSERT ((old_sa.sa_flags & SA_SIGINFO) == 0);
|
|
#if !defined __GLIBC__ /* see above */
|
|
ASSERT (old_sa.sa_handler == SIG_DFL);
|
|
#endif
|
|
|
|
sa.sa_handler = SIG_IGN;
|
|
ASSERT (sigaction (SIGABRT, &sa, NULL) == 0);
|
|
ASSERT (raise (SIGABRT) == 0);
|
|
ASSERT (sigaction (SIGABRT, NULL, &old_sa) == 0);
|
|
ASSERT (old_sa.sa_handler == SIG_IGN);
|
|
ASSERT (raise (SIGABRT) == 0);
|
|
|
|
return 0;
|
|
}
|