#include <stdio.h>
#include <stdlib.h>

/* this shows how the popen fails to spawn "pwd" if /bin/sh is not on path */

int main()
{
	char buff[41];
	FILE* f;

	f = popen("pwd", "r");

	if(!f)
	{
		printf("popen error\n");
		return 1;
	}

	while(fgets(buff, 40, f))
		printf("read: %s\n", buff);

	printf("pclose returned: %d\n", pclose(f));
	return 0;
}