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Commit fd1e758e authored by iliya's avatar iliya
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jad, debrouille toi

parent d54a5d53
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with 24 additions and 5 deletions
signaux/ex3/prog.c
+ 24
− 5
View file @ fd1e758e
...@@ -8,17 +8,34 @@ volatile sig_atomic_t count = 0; ...@@ -8,17 +8,34 @@ volatile sig_atomic_t count = 0;
struct sigaction usr1; struct sigaction usr1;
static void handler_usr1(int __attribute__((unused)) signum) { static void handler_usr1(int __attribute__((unused)) signum) {
// if (sigismember(&usr1.sa_mask, SIGTSTP) == 1) {
// fprintf(stdout, "SIGTSTP will be unblocked...\n");
//
// if (sigdelset(&usr1.sa_mask, SIGTSTP) == -1) {
// perror("sigdelset");
// }
// } else if (sigismember(&usr1.sa_mask, SIGTSTP) == 0) {
// fprintf(stdout, "SIGTSTP will be blocked...\n");
//
// if (sigaddset(&usr1.sa_mask, SIGTSTP) == -1) {
// perror("sigaddset");
// }
// } else {
// perror("sigismember");
// }
if (sigismember(&usr1.sa_mask, SIGTSTP) == 1) { if (sigismember(&usr1.sa_mask, SIGTSTP) == 1) {
fprintf(stdout, "SIGTSTP will be unblocked...\n"); fprintf(stdout, "SIGTSTP will be unblocked...\n");
if (sigprocmask(SIG_UNBLOCK, &usr1.sa_mask, NULL) == -1) {
if (sigdelset(&usr1.sa_mask, SIGTSTP) == -1) { perror("sigprocmask");
perror("sigdelset");
} }
sigaddset(&usr1.sa_mask, SIGTSTP);
} else if (sigismember(&usr1.sa_mask, SIGTSTP) == 0) { } else if (sigismember(&usr1.sa_mask, SIGTSTP) == 0) {
fprintf(stdout, "SIGTSTP will be blocked...\n"); fprintf(stdout, "SIGTSTP will be blocked...\n");
if (sigaddset(&usr1.sa_mask, SIGTSTP) == -1) { sigaddset(&usr1.sa_mask, SIGTSTP);
perror("sigaddset"); if (sigprocmask(SIG_BLOCK, &usr1.sa_mask, NULL) == -1) {
perror("sigprocmask");
} }
} else { } else {
perror("sigismember"); perror("sigismember");
...@@ -34,6 +51,8 @@ int main(void) { ...@@ -34,6 +51,8 @@ int main(void) {
usr1.sa_flags = 0; usr1.sa_flags = 0;
sigemptyset(&usr1.sa_mask); sigemptyset(&usr1.sa_mask);
sigprocmask(SIG_BLOCK, &usr1.sa_mask, NULL);
if (sigaddset(&usr1.sa_mask, SIGTSTP) == -1) { if (sigaddset(&usr1.sa_mask, SIGTSTP) == -1) {
perror("sigaddset"); perror("sigaddset");
} }
......
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