screen says "Bad tty" if /dev/console is a symlink

[Игорь Пашев <pashev.igor@gmail.com>]

Before filling a bug, I need a review :-)

The patch fo screen.cc [1] introduces the function CheckTtyname():

 int
 CheckTtyname (tty)
 char *tty;
 {
   struct stat st;

   if (lstat(tty, &st) || !S_ISCHR(st.st_mode) ||
      (st.st_nlink > 1 && strncmp(tty, "/dev/", 5)))
     return -1;
   return 0;
 }

When I run screen on a "real" console, screen says "Bad tty '/dev/console'"
I guess this is due to:

1.  /dev/console is a symlink (don't ask ;-):
# ls -lh /dev/console
lrwxrwxrwx 1 root root 30 May 13  2012 /dev/console ->
../devices/pseudo/cn@0:console

2. lstat() stats a symlink itself, and it is obviosly not a character device.

Does it make sense to replace lstat() with stat()?


[1] http://anonscm.debian.org/gitweb/?p=collab-maint/screen.git;a=blob;f=debian/patches/47screen-cc.patch;h=a8f58e6c0c61fab6250e952e2707af0ff98b8452;hb=HEAD