diff options
Diffstat (limited to 'sysdeps/unix/bsd/ptsname.c')
-rw-r--r-- | sysdeps/unix/bsd/ptsname.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/sysdeps/unix/bsd/ptsname.c b/sysdeps/unix/bsd/ptsname.c new file mode 100644 index 0000000000..83e3890e7c --- /dev/null +++ b/sysdeps/unix/bsd/ptsname.c @@ -0,0 +1,78 @@ +/* Copyright (C) 1998 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <paths.h> +#include <stdlib.h> +#include <string.h> +#include <sys/stat.h> +#include <unistd.h> + +/* Static buffer for `ptsname'. */ +static char buffer[sizeof (_PATH_TTY) + 2]; + + +/* Return the pathname of the pseudo terminal slave assoicated 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) +{ + return __ptsname_r (fd, buffer, sizeof (buffer)) != 0 ? NULL : buffer; +} + + +/* 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) +{ + int save_errno = errno; + struct stat st; + + if (buf == NULL) + { + __set_errno (EINVAL); + return EINVAL; + } + + if (!__isatty (fd)) + { + __set_errno (ENOTTY); + return ENOTTY; + } + + if (buflen < strlen (_PATH_TTY) + 3) + { + __set_errno (ERANGE); + return ERANGE; + } + + if (__ttyname_r (fd, buf, buflen) != 0) + return errno; + + buf[sizeof (_PATH_DEV) - 1] = 't'; + + if (__stat (buf, &st) < 0) + return errno; + + __set_errno (save_errno); + return 0; +} +weak_alias (__ptsname_r, ptsname_r) |