39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <unistd.h>
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#include <sys/wait.h>
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int main(int argc, char *argv[]){
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if(argc < 3){
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printf("usage: %s <program> <int>\n",argv[0]);
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exit(0);
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}
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char *child_prog = argv[1]; // program to run as a child
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int lifetime = atoi(argv[2]); // time to wait to end child
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int pid = fork(); // fork execution
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if(pid == 0){ // CHILD
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execlp(child_prog, child_prog, NULL); // execute specified program
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}
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int status, ret; // PARENT
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while(1){ // Loop until child done
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sleep(lifetime); // sleep for given "lifetime" of child
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ret = waitpid(pid, &status, WNOHANG); // check on child
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if(ret == pid){ // if child is finished
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break; // break from loop
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}
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int result = kill(pid,SIGINT); // send a interrupt signal to child
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printf("kill result: %d\n",result); // check on delivery
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}
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if(WIFSIGNALED(status)){ // check if a signal ended the child
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printf("child process %d terminated with signal %d\n",
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pid,WTERMSIG(status));
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}
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exit(0);
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}
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