| /* |
| * Copyright (c) 2003, Intel Corporation. All rights reserved. |
| * Created by: salwan.searty REMOVE-THIS AT intel DOT com |
| * This file is licensed under the GPL license. For the full content |
| * of this license, see the COPYING file at the top level of this |
| * source tree. |
| |
| Assumption: The test assumes that this program is run under normal conditions, |
| and not when the processor and other resources are too stressed. |
| |
| Steps: |
| 1. Fork() a child process. In the child, add SIGUSR1 to the process's signal mask. |
| This is its original signal mask. Now suspend the child, passing sigsuspend another |
| signal mask. One that doesn't contain SIGUSR1, but contains SIGUSR2. |
| 2. From the parent, send the child a SIGUSR1 signal so that the child returns from |
| suspension. |
| 3. Once the sigsuspend returns, have the child probe the signal mask using the is_changed() |
| function which basically verifies that the signal mask is restored to what it was originally |
| before the call to sigsuspend. I.e. SIGUSR1 in the mask and SIGUSR2 not in the mask. Have |
| the child return to the parent process with: |
| - a return value of 1 if the original signal mask was not restored, or |
| - a return value of 0 if the original signal mask was successfully restored. |
| 4. Finally from the parent, return a PTS_PASS if recieved the return value of the child was not |
| a 1. |
| |
| */ |
| |
| #include <signal.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include "posixtest.h" |
| |
| #define NUMSIGNALS (sizeof(siglist) / sizeof(siglist[0])) |
| |
| void handler(int signo) |
| { |
| } |
| |
| int is_changed(sigset_t set, int sig) { |
| |
| int i; |
| int siglist[] = {SIGABRT, SIGALRM, SIGBUS, SIGCHLD, |
| SIGCONT, SIGFPE, SIGHUP, SIGILL, SIGINT, |
| SIGPIPE, SIGQUIT, SIGSEGV, |
| SIGTERM, SIGTSTP, SIGTTIN, SIGTTOU, |
| SIGUSR1, SIGUSR2, |
| #ifdef SIGPOLL |
| SIGPOLL, |
| #endif |
| #ifdef SIGPROF |
| SIGPROF, |
| #endif |
| SIGSYS, |
| SIGTRAP, SIGURG, SIGVTALRM, SIGXCPU, SIGXFSZ }; |
| |
| if (sigismember(&set, sig) != 1) { |
| return 1; |
| } |
| for (i=0; i<NUMSIGNALS; i++) { |
| if ((siglist[i] != sig)) { |
| if (sigismember(&set, siglist[i]) != 0) { |
| return 1; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| int main() |
| { |
| pid_t pid; |
| pid = fork(); |
| |
| if (pid == 0) { |
| /* child */ |
| |
| sigset_t tempmask, originalmask, currentmask; |
| |
| struct sigaction act; |
| |
| act.sa_handler = handler; |
| act.sa_flags=0; |
| sigemptyset(&act.sa_mask); |
| |
| sigemptyset(&tempmask); |
| sigaddset(&tempmask, SIGUSR2); |
| |
| if (sigaction(SIGUSR1, &act, 0) == -1) { |
| perror("Unexpected error while attempting to pre-conditions"); |
| return PTS_UNRESOLVED; |
| } |
| |
| sigemptyset(&originalmask); |
| sigaddset(&originalmask, SIGUSR1); |
| sigprocmask(SIG_SETMASK, &originalmask, NULL); |
| |
| printf("suspending child\n"); |
| if (sigsuspend(&tempmask) != -1) |
| perror("sigsuspend error"); |
| |
| printf("returned from suspend\n"); |
| |
| sigprocmask(SIG_SETMASK, NULL, ¤tmask); |
| |
| if (is_changed(currentmask, SIGUSR1) != 0) { |
| printf("signal mask was not restored properly after sigsuspend returned\n"); |
| return 1; |
| } |
| return 0; |
| |
| } else { |
| int s; |
| int exit_status; |
| |
| /* parent */ |
| sleep(1); |
| |
| printf("parent sending child a SIGUSR1 signal\n"); |
| kill (pid, SIGUSR1); |
| |
| if (wait(&s) == -1) { |
| perror("Unexpected error while setting up test " |
| "pre-conditions"); |
| return PTS_UNRESOLVED; |
| } |
| |
| if (!WIFEXITED(s)) { |
| printf("Test FAILED: Did not exit normally\n"); |
| return PTS_FAIL; |
| } |
| |
| exit_status = WEXITSTATUS(s); |
| |
| printf("Exit status from child is %d\n", exit_status); |
| |
| if (exit_status == 1) { |
| return PTS_FAIL; |
| } |
| |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } |
| } |