akmubi

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

#define BUF_SIZE 128

int name_pc(char* buf) {
  FILE *p = popen("hostname", "r");
  if (p == NULL)
    return 0;

  int r = 1;
  if (!fgets(buf, BUF_SIZE, p))
    r = 0;

  pclose(p);
  return r;
}

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

  if (!name_pc(hostname)) {
    fputs("Error!", stderr);
    return EXIT_FAILURE;
  }
  
  printf("%s\n", hostname);

  return EXIT_SUCCESS;
}