On the Linux system, write and run a C program that will: fork into two processe

Question

On the Linux system, write and run a C program that will:

fork into two processes: the parent will wait for the child to finish and print ‘We are all done.’ The child will execute the ‘ls’ command to print out a list of the files in the directory.

You may use any editor – ed, vi, pico, emacs – to create your program (save the file as filename.c, where filename is any name you choose). To compile use the c compiler (gcc) on your program:

gcc filename.c

The result of the compilation, assuming no errors, is a file a.out. Since your directory is not in the default path, you run the program as:

./a.out

That’s a period, followed by a slash, followed by a.out.

Submit: the name of your source file (filename.c) and the path to the directory it is in, which should be your account name (that is you default directory) and maybe a subdirectory, if you created one. I will read (maybe compile) and run your program.

Explanation / Answer

#include<stdio.h>
#include<sys/types.h>
#include<unistd.h>
int main(){

int p = fork();
if(p < 0){
printf("fork failed");
return 0;
}
if(p == 0){
System(ls);
}else{
wait(5);
printf(" We are all done. ");
}
return 0;
}

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