| /* ptsname -- return the name of a pty slave given an FD to the pty master |
| Copyright (C) 1999-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <string.h> |
| #include <hurd.h> |
| #include <hurd/fd.h> |
| #include <hurd/term.h> |
| |
| |
| /* Return the pathname of the pseudo terminal slave associated with |
| the master FD is open on, or NULL on errors. |
| The returned storage is good until the next call to this function. */ |
| char * |
| ptsname (int fd) |
| { |
| static string_t peername; |
| error_t err; |
| |
| err = __ptsname_r (fd, peername, sizeof (peername)); |
| |
| return err ? NULL : peername; |
| } |
| |
| |
| /* Store at most BUFLEN characters of the pathname of the slave pseudo |
| terminal associated with the master FD is open on in BUF. |
| Return 0 on success, otherwise an error number. */ |
| int |
| __ptsname_r (int fd, char *buf, size_t buflen) |
| { |
| string_t peername; |
| size_t len; |
| error_t err; |
| |
| if (err = HURD_DPORT_USE (fd, __term_get_peername (port, peername))) |
| return __hurd_dfail (fd, err), errno; |
| |
| len = __strnlen (peername, sizeof peername - 1) + 1; |
| if (len > buflen) |
| { |
| errno = ERANGE; |
| return ERANGE; |
| } |
| |
| memcpy (buf, peername, len); |
| return 0; |
| } |
| weak_alias (__ptsname_r, ptsname_r) |