Function rcomp

zic.c:1871–1876

/* Return 1 if NAME is an absolute symbolic link, -1 if it is relative,
   0 if it is not a symbolic link.  If *CACHE is not -2, it is the
   cached result of a previous call to this function with the same NAME.  */
static int
itssymlink(char const *name, int *cache)
{
  if (*cache == -2) {
    char c = '\0';
    *cache = readlink(name, &c, 1) < 0 ? 0 : c == '/' ? 1 : -1;
  }