lib/ip/getdomain.c

   1 /*      getdomainname()                                 Author: Kees J. Bot
   2  *                                                              2 Dec 1994
   3  */
   4 #define nil 0
   5 #include <sys/types.h>
   6 #include <sys/utsname.h>
   7 #include <unistd.h>
   8 #include <string.h>
   9
  10 int getdomainname(char *domain, size_t size)
  11 {
  12         char nodename[256];
  13         char *dot;
  14
  15         if (gethostname(nodename, sizeof(nodename)) < 0)
  16                 return -1;
  17         nodename[sizeof(nodename)-1]= 0;
  18         if ((dot= strchr(nodename, '.')) == nil) dot= ".";
  19
  20         strncpy(domain, dot+1, size);
  21         if (size > 0) domain[size-1]= 0;
  22         return 0;
  23 }