/* * tst-syslogd.c - tests concurrent threads calling syslog * * build with: gcc -Wall tst-syslogd.c -lpthread */ #include #include #include #include void *log_func(void *arg) { int i; int thrid = (int)arg; openlog(NULL, LOG_PERROR | LOG_PID, LOG_USER); for (i = 0; i < 10; i++) { syslog(LOG_DEBUG, "thread %i iter %i\n", thrid, i); sleep(thrid); /* this mixes things up a bit */ } closelog(); return NULL; } int main(int argc, char **argv) { pthread_t thr1, thr2, thr3; int id1 = 1; int id2 = 2; int id3 = 3; pthread_create(&thr1, NULL, log_func, (void *)id1); pthread_create(&thr2, NULL, log_func, (void *)id2); pthread_create(&thr3, NULL, log_func, (void *)id3); pthread_join(thr1, NULL); pthread_join(thr2, NULL); pthread_join(thr3, NULL); return 0; }