/* redirects the output of "ypcat hosts" to grep "<gethostname>" redirected
   to "host.dat"(temporary) file. Read the resulting line into Adrs, which
   is 16 characters long (note that the machine host name starts on the 
   17th character on each line.
*/


#include <stdio.h>

FILE *fin;
int i;

main(int argc, char *argv[])
{ char Machine[31];
  char Adrs[16], cmd[60];
  
  gethostname(Machine,31);
  
  sprintf(cmd,"ypcat hosts | grep %s > host.dat ",Machine);
  system(cmd);
  fin = fopen("host.dat","r");
  fscanf(fin,"%s\n",Adrs);
  fclose(fin);
  unlink("host.dat");
  fprintf(stderr,"%s\n",Adrs);
}