Run SYSTEM command and get output in C

#include 
#include  
int main( int argc, char *argv[] )
{ 
FILE *fp;
int status;
char path[1035]; 
/* Open the command for reading. */
fp = popen("/bin/ls /etc/", "r");
if (fp == NULL) {
  printf("Failed to run command\n" );  
  exit; 
} 
/* Read the output a line at a time - output it. */
while (fgets(path, sizeof(path)-1, fp) != NULL) {
  printf("%s", path); 
}
/* close */   pclose(fp);
return 0;
}




We can parse the string path by following concept for example

(Consider my input) -> hi, Me A.  2154
it suppose to return:
hi
Me
A
2154


Then following Program will help you,



#include 
#include 
int main(void)
{
char message[50], *current, *last;

gets(message);
last=message;

current=strtok(last, ",");
puts(current);

current=strtok(NULL, " ");
puts(current);

current=strtok(NULL, ".");
puts(current);

current=strtok(NULL, " ");
puts(current);

current=strtok(NULL, " ");
puts(current);

current=strtok(NULL, " ");
puts(current);

return;
}



STRTOK()

A sequence of calls to strtok() breaks the string pointed to by s1 into a sequence of tokens,
 each of which is delimited by a byte from the string pointed to by s2.
 The first call in the sequence has s1 as its first argument,
 and is followed by calls with a null pointer as their first argument.
 The separator string pointed to by s2 may be different from call to call.