calling shell in C and getting output

To execute shell command from C and get the output to C we need to use the

popen command  in C.

include <stdio.h>

2

3	int main(void) {

4

FILE *in;

5	extern FILE *popen();

6	char buff[512];

7

8	if(!(in = popen("ls -sail", "r"))){

9

exit(1);

10

}

11

12	while(fgets(buff, sizeof(buff), in)!=NULL){

13	printf("%s", buff);

14

}

15	pclose(in);

16

17

}

As stated in the program this can be used to get the output to the command.