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Update 10.11.c #11

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Update 10.11.c #11

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14 changes: 7 additions & 7 deletions 10.11.c
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Original file line number Diff line number Diff line change
Expand Up @@ -9,36 +9,36 @@ int main(void)
sigset_t newmask, oldmask, pendmask;

if (signal(SIGQUIT, sig_quit) == SIG_ERR) {
printf("can't catch SIGQUIT\n");
printf("... can't catch SIGQUIT...\n");
exit(-1);
}

sigemptyset(&newmask);
sigaddset(&newmask, SIGQUIT);

if (sigprocmask(SIG_BLOCK, &newmask, &oldmask) < 0) {
printf("SIG_BLOCK error\n");
printf("... SIG_BLOCK error...\n");
exit(-1);
}

sleep(5);

if (sigpending(&pendmask) < 0) {
printf("sigpending error\n");
printf("...sigpending error...\n");
exit(-1);
}

if (sigismember(&pendmask, SIGQUIT)) {
printf("\nSIGQUIT pending\n");
printf("\n...SIGQUIT pending...\n");
exit(-1);
}

if (sigprocmask(SIG_SETMASK, &oldmask, NULL) < 0) {
printf("SIG_SETMASK error\n");
printf("...SIG_SETMASK error...\n");
exit(-1);
}

printf("SIGQUIT unblocked\n");
printf("...SIGQUIT unblocked...\n");

sleep(5);

Expand All @@ -49,7 +49,7 @@ static void sig_quit(int signo)
{
printf("caught SIGQUIT\n");
if (signal(SIGQUIT, SIG_DFL) == SIG_ERR) {
printf("can't reset SIGQUIT");
printf("...can't reset SIGQUIT...");
exit(-1);
}
}