diff options
Diffstat (limited to 'signal/tst-sigset2.c')
| -rw-r--r-- | signal/tst-sigset2.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/signal/tst-sigset2.c b/signal/tst-sigset2.c new file mode 100644 index 0000000000..f653323321 --- /dev/null +++ b/signal/tst-sigset2.c @@ -0,0 +1,184 @@ +/* sigset_SIG_HOLD_bug.c [BZ #1951] */ +#include <errno.h> +#include <error.h> +#include <inttypes.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/wait.h> + +#define TEST_SIG SIGINT + + +/* Print mask of blocked signals for this process */ +static void +printSigMask (const char *msg) +{ + sigset_t currMask; + int sig; + int cnt; + + if (msg != NULL) + printf ("%s", msg); + + if (sigprocmask (SIG_BLOCK, NULL, &currMask) == -1) + error (1, errno, "sigaction"); + + cnt = 0; + for (sig = 1; sig < NSIG; sig++) + { + if (sigismember (&currMask, sig)) + { + cnt++; + printf ("\t\t%d (%s)\n", sig, strsignal (sig)); + } + } + + if (cnt == 0) + printf ("\t\t<empty signal set>\n"); +} /* printSigMask */ + +static void +handler (int sig) +{ + printf ("Caught signal %d\n", sig); + printSigMask ("Signal mask in handler\n"); + printf ("Handler returning\n"); + _exit (1); +} /* handler */ + +static void +printDisposition (sighandler_t disp) +{ + if (disp == SIG_HOLD) + printf ("SIG_HOLD"); + else if (disp == SIG_DFL) + printf ("SIG_DFL"); + else if (disp == SIG_IGN) + printf ("SIG_IGN"); + else + printf ("handled at %" PRIxPTR, (uintptr_t) disp); +} /* printDisposition */ + +static int +returnTest1 (void) +{ + sighandler_t prev; + + printf ("===== TEST 1 =====\n"); + printf ("Blocking signal with sighold()\n"); + if (sighold (TEST_SIG) == -1) + error (1, errno, "sighold"); + printSigMask ("Signal mask after sighold()\n"); + + printf ("About to use sigset() to establish handler\n"); + prev = sigset (TEST_SIG, handler); + if (prev == SIG_ERR) + error(1, errno, "sigset"); + + printf ("Previous disposition: "); + printDisposition (prev); + printf (" (should be SIG_HOLD)\n"); + if (prev != SIG_HOLD) + { + printf("TEST FAILED!!!\n"); + return 1; + } + return 0; +} /* returnTest1 */ + +static int +returnTest2 (void) +{ + sighandler_t prev; + + printf ("\n===== TEST 2 =====\n"); + + printf ("About to use sigset() to set SIG_HOLD\n"); + prev = sigset (TEST_SIG, SIG_HOLD); + if (prev == SIG_ERR) + error (1, errno, "sigset"); + + printf ("Previous disposition: "); + printDisposition (prev); + printf (" (should be SIG_DFL)\n"); + if (prev != SIG_DFL) + { + printf("TEST FAILED!!!\n"); + return 1; + } + return 0; +} /* returnTest2 */ + +static int +returnTest3 (void) +{ + sighandler_t prev; + + printf ("\n===== TEST 3 =====\n"); + + printf ("About to use sigset() to set SIG_HOLD\n"); + prev = sigset (TEST_SIG, SIG_HOLD); + if (prev == SIG_ERR) + error (1, errno, "sigset"); + + printf ("About to use sigset() to set SIG_HOLD (again)\n"); + prev = sigset (TEST_SIG, SIG_HOLD); + if (prev == SIG_ERR) + error (1, errno, "sigset"); + + printf ("Previous disposition: "); + printDisposition (prev); + printf (" (should be SIG_HOLD)\n"); + if (prev != SIG_HOLD) + { + printf("TEST FAILED!!!\n"); + return 1; + } + return 0; +} /* returnTest3 */ + +int +main (int argc, char *argv[]) +{ + pid_t childPid; + + childPid = fork(); + if (childPid == -1) + error (1, errno, "fork"); + + if (childPid == 0) + exit (returnTest1 ()); + + int status; + if (TEMP_FAILURE_RETRY (waitpid (childPid, &status, 0)) != childPid) + error (1, errno, "waitpid"); + int result = !WIFEXITED (status) || WEXITSTATUS (status) != 0; + + childPid = fork(); + if (childPid == -1) + error (1, errno, "fork"); + + if (childPid == 0) + exit (returnTest2 ()); + + if (TEMP_FAILURE_RETRY (waitpid (childPid, &status, 0)) != childPid) + error (1, errno, "waitpid"); + result |= !WIFEXITED (status) || WEXITSTATUS (status) != 0; + + childPid = fork(); + if (childPid == -1) + error (1, errno, "fork"); + + if (childPid == 0) + exit (returnTest3 ()); + + if (TEMP_FAILURE_RETRY (waitpid (childPid, &status, 0)) != childPid) + error (1, errno, "waitpid"); + result |= !WIFEXITED (status) || WEXITSTATUS (status) != 0; + + return result; +} /* main */ |