91 lines
1.6 KiB
C
91 lines
1.6 KiB
C
#include <stdio.h>
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#include <unistd.h>
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#include <signal.h>
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#include <pthread.h>
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#include <assert.h>
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#include <sys/wait.h>
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void *
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slavethread(void *arg)
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{
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sigset_t sigmask;
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if (sigfillset(&sigmask))
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{
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fprintf(stderr, "Error line %u\n", __LINE__);
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_exit(255);
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}
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if (pthread_sigmask(SIG_UNBLOCK, &sigmask, 0))
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{
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fprintf(stderr, "Error line %u\n", __LINE__);
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_exit(255);
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}
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while (1)
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sleep(1);
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}
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void
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childprocess()
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{
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pthread_t slave;
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if (pthread_create(&slave, 0, &slavethread, 0))
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{
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fprintf(stderr, "Error line %u\n", __LINE__);
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_exit(255);
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}
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while (1)
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sleep(1);
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}
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int main(int argc, char **argv)
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{
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sigset_t sigmask;
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if (sigfillset(&sigmask))
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{
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fprintf(stderr, "Error line %u\n", __LINE__);
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return 255;
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}
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if (pthread_sigmask(SIG_BLOCK, &sigmask, 0))
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{
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fprintf(stderr, "Error line %u\n", __LINE__);
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return 255;
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}
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int childpid = fork();
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if (-1 == childpid)
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{
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fprintf(stderr, "Error line %u\n", __LINE__);
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return 255;
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}
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if ( ! childpid)
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childprocess();
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if (kill(childpid, SIGTERM))
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{
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fprintf(stderr, "Error line %u\n", __LINE__);
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return 255;
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}
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int status;
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if (childpid != waitpid(childpid, &status, 0))
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{
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fprintf(stderr, "Error line %u\n", __LINE__);
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return 255;
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}
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assert(WIFSIGNALED(status));
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fprintf(stderr, "Signal %d\n", WTERMSIG(status));
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assert(WTERMSIG(status) == SIGTERM);
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return 0;
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}
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