Using C, create a program that creates a child process and the child process pri
ID: 3694938 • Letter: U
Question
Using C, create a program that creates a child process and the child process prints when it is created and then goes into a infinite loop to wait for a signal. In the main function for the parent process, list several signals the the user can choose from to send to the child process, get the number for the signal from the user, and send it to the child process. When the child process receives a signal, print out that it has and which signal it received. Have the parent process wait on the child to process to finish and then print out "All done!".
Sample Runs:
Child process created!
Enter the number for the signal you want to send.
SIGHUP 1
SIGINT 2
SIGFPE 8
SIGSEGV 11
SIGTERM 15
Number: 1
Child process received signal: SIGHUP
All done!
Explanation / Answer
#include "executor.h"
int exec(std::string path) {
pid_t PID = 0;
int result = 0, filedes[2], status;
/* Create child process: */
PID = fork();
if (PID == -1) {
return 1;
}
result = pipe(filedes);
if (PID != 0) {
std::cout << "Created child process. PID: " << PID << " ";
}
if (result == -1) {
return 1;
}
if (PID == 0) { // This is the child process
std::string prog = "./" + path;
execvp(prog.c_str(), NULL); // Execute the program
} else { // This is the parent process
waitpid(PID, &status, 0); // Wait for the child process to return.
std::cout << "Process returned " << WEXITSTATUS(status) << ". ";
std::cout << "Press enter. ";
}
return 0;
}
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