src/unistd/ttyname.c

   1 #include <unistd.h>
   2 #include <errno.h>
   3 #include <limits.h>
   4
   5 char *ttyname(int fd)
   6 {
   7         static char buf[TTY_NAME_MAX];
   8         int result;
   9         if ((result = ttyname_r(fd, buf, sizeof buf))) {
  10                 errno = result;
  11                 return NULL;
  12         }
  13         return buf;
  14 }