Thread: higher level directory

Code:

#include <stdio.h>

int main(){


int j =0;



for( ; j < 3 ; j++){ 

int pid= fork();

if(pid ==0 ){

if(j==0)execlp("pwd",  NULL);
else if(j == 1) execlp("cd", "..", NULL);
else execlp("pwd", NULL);

}
else{

wait(0);
}


}

return 0;
}

The output of pwd is the same
how can i go to higher level directory?

AFAIK, the shell commands that you're giving aren't related to each other. This is a much better way to do it (I assume you're on linux/unix/bsd): File Access and Directory System Calls

what would happen if you pass invalid arguments? Will it crash the program?

That execlp function looks strange. I assume you're running Unix, since you're trying to execute the pwd command. Try something like this.

Code:

#include <unistd.h> /* Needed for fork function */

/* code code code... */

for (j = 0; j < 3; x++)
{
     int pid = fork();
     if (pid == 0)
     {
          if (j == 0) system("pwd");
          else if (j == 1) system("cd ..");
          else system("pwd");
     }
     else {
          wait(0);
     }
}

That should work better for you.

Most of the time, using the shell isn't a very good way of doing this especially if library calls are available for the exact purpose...

No Babkockdood still it doesnt work

It would help if you would SPIT IT OUT - what OS are you on?

When two posters take the time to mention it, it's time to quit being coy, isn't it?

Doesn't chdir() function work?

no dude

What operating system are you using?!