//
#include
#include
#include
#include
#include
#define TRUE 1
#define FALSE 0
#define BELLS “\007\007\007”
int alarm_flag = FALSE;
void setflag(int sig) {
alarm_flag = TRUE;
}
int main(int argc, char **argv) {
int nsecs, j;
pid_t pid;
// static struct sigaction act;
if (argc <= 2){ fprintf(stderr, "Usuage: tml #minutes message\n"); exit(1); } if ((nsecs = atoi(argv[1]) * 60) <= 0){ fprintf(stderr, "tml: invalid time \n"); exit(2); } switch (pid = fork()) { case -1: perror("tml"); exit(1); case 0: //child break; default: //parent printf("tml process-id %d\n", pid); exit(0); } signal(SIGALRM, setflag); alarm(nsecs); pause(); if (alarm_flag == TRUE) { printf(BELLS); for (j = 2; j < argc; j++) printf("%s ", argv[j]); printf("\n"); } exit(0); }