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2006-04-23 Ulrich Drepper <drepper@redhat.com> [BZ #1951] * sysdeps/posix/sigset.c (sigset): Return correct value reflecting previous signal state. * signal/Makefile (tests): Add tst-sigset2. * signal/tst-sigset2.c: New file.
185 lines
3.8 KiB
C
185 lines
3.8 KiB
C
/* sigset_SIG_HOLD_bug.c [BZ #1951] */
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#include <errno.h>
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#include <error.h>
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#include <inttypes.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#define TEST_SIG SIGINT
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/* Print mask of blocked signals for this process */
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static void
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printSigMask (const char *msg)
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{
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sigset_t currMask;
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int sig;
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int cnt;
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if (msg != NULL)
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printf ("%s", msg);
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if (sigprocmask (SIG_BLOCK, NULL, &currMask) == -1)
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error (1, errno, "sigaction");
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cnt = 0;
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for (sig = 1; sig < NSIG; sig++)
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{
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if (sigismember (&currMask, sig))
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{
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cnt++;
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printf ("\t\t%d (%s)\n", sig, strsignal (sig));
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}
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}
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if (cnt == 0)
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printf ("\t\t<empty signal set>\n");
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} /* printSigMask */
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static void
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handler (int sig)
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{
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printf ("Caught signal %d\n", sig);
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printSigMask ("Signal mask in handler\n");
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printf ("Handler returning\n");
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_exit (1);
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} /* handler */
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static void
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printDisposition (sighandler_t disp)
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{
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if (disp == SIG_HOLD)
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printf ("SIG_HOLD");
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else if (disp == SIG_DFL)
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printf ("SIG_DFL");
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else if (disp == SIG_IGN)
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printf ("SIG_IGN");
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else
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printf ("handled at %" PRIxPTR, (uintptr_t) disp);
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} /* printDisposition */
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static int
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returnTest1 (void)
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{
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sighandler_t prev;
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printf ("===== TEST 1 =====\n");
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printf ("Blocking signal with sighold()\n");
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if (sighold (TEST_SIG) == -1)
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error (1, errno, "sighold");
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printSigMask ("Signal mask after sighold()\n");
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printf ("About to use sigset() to establish handler\n");
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prev = sigset (TEST_SIG, handler);
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if (prev == SIG_ERR)
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error(1, errno, "sigset");
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printf ("Previous disposition: ");
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printDisposition (prev);
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printf (" (should be SIG_HOLD)\n");
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if (prev != SIG_HOLD)
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{
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printf("TEST FAILED!!!\n");
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return 1;
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}
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return 0;
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} /* returnTest1 */
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static int
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returnTest2 (void)
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{
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sighandler_t prev;
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printf ("\n===== TEST 2 =====\n");
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printf ("About to use sigset() to set SIG_HOLD\n");
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prev = sigset (TEST_SIG, SIG_HOLD);
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if (prev == SIG_ERR)
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error (1, errno, "sigset");
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printf ("Previous disposition: ");
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printDisposition (prev);
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printf (" (should be SIG_DFL)\n");
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if (prev != SIG_DFL)
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{
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printf("TEST FAILED!!!\n");
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return 1;
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}
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return 0;
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} /* returnTest2 */
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static int
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returnTest3 (void)
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{
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sighandler_t prev;
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printf ("\n===== TEST 3 =====\n");
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printf ("About to use sigset() to set SIG_HOLD\n");
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prev = sigset (TEST_SIG, SIG_HOLD);
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if (prev == SIG_ERR)
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error (1, errno, "sigset");
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printf ("About to use sigset() to set SIG_HOLD (again)\n");
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prev = sigset (TEST_SIG, SIG_HOLD);
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if (prev == SIG_ERR)
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error (1, errno, "sigset");
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printf ("Previous disposition: ");
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printDisposition (prev);
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printf (" (should be SIG_HOLD)\n");
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if (prev != SIG_HOLD)
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{
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printf("TEST FAILED!!!\n");
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return 1;
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}
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return 0;
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} /* returnTest3 */
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int
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main (int argc, char *argv[])
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{
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pid_t childPid;
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childPid = fork();
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if (childPid == -1)
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error (1, errno, "fork");
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if (childPid == 0)
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exit (returnTest1 ());
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int status;
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if (TEMP_FAILURE_RETRY (waitpid (childPid, &status, 0)) != childPid)
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error (1, errno, "waitpid");
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int result = !WIFEXITED (status) || WEXITSTATUS (status) != 0;
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childPid = fork();
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if (childPid == -1)
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error (1, errno, "fork");
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if (childPid == 0)
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exit (returnTest2 ());
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if (TEMP_FAILURE_RETRY (waitpid (childPid, &status, 0)) != childPid)
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error (1, errno, "waitpid");
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result |= !WIFEXITED (status) || WEXITSTATUS (status) != 0;
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childPid = fork();
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if (childPid == -1)
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error (1, errno, "fork");
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if (childPid == 0)
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exit (returnTest3 ());
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if (TEMP_FAILURE_RETRY (waitpid (childPid, &status, 0)) != childPid)
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error (1, errno, "waitpid");
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result |= !WIFEXITED (status) || WEXITSTATUS (status) != 0;
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return result;
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} /* main */
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