program 1

 #include <stdio.h>

#include <stdlib.h>

#include <sys/types.h>

#include <sys/wait.h>

#include <unistd.h>


int main() {

// Create a child process

pid_t child_pid = fork();


if (child_pid < 0) {

perror("Fork failed");

exit(1);

}


if (child_pid == 0) {

// This code will be executed by the child process

// Execute a different program using exec

char *args[] = {"ls", "-l", NULL};


execvp("ls", args);


// If execvp fails, this code will be executed

perror("Exec failed");

exit(1);

} else {

// This code will be executed by the parent process


// Wait for the child process to finish

int status;

wait(&status);


if (WIFEXITED(status)) {

printf("Child process exited with status: %d\n", WEXITSTATUS(status));

} else {

perror("Child process didn't exit normally");

}

}

return 0;

}

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