Thread: checking sys commands

How would i check a system command? example:

Code:

system("ping 127.0.0.1");

and i wanted it to store it to a txt if it was right, and go to ... say 62.4.55.211 after it and do the same, etc etc. Plz could someone help me with validating system commands? thanx

"if it was right" . as in "if it was a real ip". as in "if it was NOT a wrong ip". as in "if it is a wrong ip dont write it to the file".

dont get crazy turbo. It's called "I can't find it". as in "I needed some help from people in real life". As in "I came for help". As in "I asked for help here". As in "I wasnt beingrude". As in "but now i am". As in "Because you are being the bastard". As in "SHOVE OFF".

naaaa, the star crunch has always been the best

Now back to the original problem

try a variation of this:

#include <stdlib.h>
#include <stdio.h>
char command[128];
FILE *fPtr;
int first = 127;
int second = 0;
int third = 0;
int forth = 1;

sprintf(command, "ping %d.%d.%d.%d\0", first, second, third, forth);
// when creating the ping command, add an option for
// how many times it should ping, I can not remember
// what the option is

fPtr = popen(command, "r");
if(fPtr == NULL) return -1;

while(!feof(fPtr))
{
// use fscanf or fgets to get the output from the command
// parse the output for what you want
}

popen creates a stream from the system command to your program