52 lines
886 B
C
52 lines
886 B
C
#include <signal.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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void sigusr1() {
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printf("Got SIGUSR1\n");
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exit(0);
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}
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int
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main()
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{
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sigset_t old_set, new_set;
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sigemptyset(&old_set);
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sigemptyset(&new_set);
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signal(SIGUSR1, sigusr1);
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if(sigaddset(&new_set, SIGSEGV) == 0)
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{
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printf("sigaddset successfully added for SIGSEGV\n");
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}
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sigprocmask(SIG_BLOCK, &new_set, &old_set);
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printf("raise(SIGSEGV)\n");
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raise(SIGSEGV);
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if(sigaddset(&new_set, SIGUSR1) == 0)
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{
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printf("sigaddset successfully added for SIGUSR1\n");
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}
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if(sigprocmask(SIG_BLOCK, &new_set, &old_set) == -1)
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{
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perror("sigprocmask");
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}
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printf("raise(SIGUSR1)\n");
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raise(SIGUSR1);
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sigemptyset(&new_set);
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sigaddset(&new_set, SIGUSR1);
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printf("unblock SIGUSR1 via sigprocmask\n");
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if(sigprocmask(SIG_UNBLOCK, &new_set, &old_set) == -1)
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{
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perror("sigprocmask");
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}
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return 1;
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}
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