progsys:index
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progsys:index [2018/10/18 13:13] – [Envoyer & Recevoir Signaux] orel | progsys:index [2024/03/18 15:06] (current) – external edit 127.0.0.1 | ||
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</ | </ | ||
+ | ==== Ctrl-C ==== | ||
+ | |||
+ | Un processus fils est dans le même PGID (process group ID) que son père par defaut (pgid père = pgid fils = pid père). Un kill sur -pid du père envoie le signal à tous le groupe, donc au fils également... | ||
+ | |||
+ | <code C sigint.c> | ||
+ | #include < | ||
+ | #include < | ||
+ | #include < | ||
+ | #include < | ||
+ | #include < | ||
+ | |||
+ | void handler(int sig) | ||
+ | { | ||
+ | printf(" | ||
+ | } | ||
+ | |||
+ | int main(void) | ||
+ | { | ||
+ | signal(SIGINT, | ||
+ | |||
+ | if (fork() == 0) | ||
+ | { | ||
+ | printf(" | ||
+ | pause(); | ||
+ | printf(" | ||
+ | exit(EXIT_SUCCESS); | ||
+ | } | ||
+ | |||
+ | printf(" | ||
+ | pause(); | ||
+ | printf(" | ||
+ | return EXIT_SUCCESS; | ||
+ | } | ||
+ | </ | ||
+ | |||
+ | |||
+ | ==== Timeout ==== | ||
+ | |||
+ | <code C executer-avant-delai.c> | ||
+ | |||
+ | #define _GNU_SOURCE | ||
+ | #include < | ||
+ | #include < | ||
+ | #include < | ||
+ | #include < | ||
+ | |||
+ | static struct sigaction sa, old; | ||
+ | static sigjmp_buf env; | ||
+ | |||
+ | static void myalarm(int sig) | ||
+ | { | ||
+ | printf(" | ||
+ | siglongjmp(env, | ||
+ | } | ||
+ | |||
+ | int executer_avant_delai( void (*fun)(void *), void *parametre, int delai_en_seconde) | ||
+ | { | ||
+ | int ret = 1; | ||
+ | sa.sa_handler = myalarm; | ||
+ | sa.sa_flags = 0; // SA_RESETHAND; | ||
+ | sigemptyset(& | ||
+ | sigaction(SIGALRM, | ||
+ | |||
+ | alarm(delai_en_seconde); | ||
+ | if(sigsetjmp(env, | ||
+ | fun(parametre); | ||
+ | else | ||
+ | ret = 0; // alarm | ||
+ | alarm(0); | ||
+ | sigaction(SIGALRM, | ||
+ | return ret; | ||
+ | } | ||
+ | </ |
progsys/index.1539868390.txt.gz · Last modified: 2024/03/18 15:05 (external edit)