whereistelinit.c

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


int main( int argc, char *argv[] ) {

  FILE *fp;
  char path[80];

  fp = popen("/usr/bin/which telinit", "r");
  if (fp == NULL) {
    printf("Failed to run command\n");
    exit(1);
  }

  while ( fgets(path, sizeof(path), fp)  != 0) {
  }
  pclose(fp);


  char cmd[100];
  strcpy(cmd, "/bin/ls -la ");
  strcat(cmd, path);

  fp = popen(cmd, "r");

  if (fp == NULL ) {
    printf("Failed to run command\n");
    exit(2);
  }

  char output[1035];
  while (fgets(output, sizeof(output), fp)) {
    printf("%s", output);
  }

  pclose(fp);

  return 0;
}