diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/getpt.c')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/getpt.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/getpt.c b/REORG.TODO/sysdeps/unix/sysv/linux/getpt.c new file mode 100644 index 0000000000..a92b8f988d --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/getpt.c @@ -0,0 +1,101 @@ +/* Copyright (C) 1998-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998. + + 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 <fcntl.h> +#include <stdlib.h> +#include <unistd.h> +#include <paths.h> +#include <sys/statfs.h> + +#include "linux_fsinfo.h" + +/* Path to the master pseudo terminal cloning device. */ +#define _PATH_DEVPTMX _PATH_DEV "ptmx" +/* Directory containing the UNIX98 pseudo terminals. */ +#define _PATH_DEVPTS _PATH_DEV "pts" + +/* Prototype for function that opens BSD-style master pseudo-terminals. */ +int __bsd_getpt (void); + +/* Open a master pseudo terminal and return its file descriptor. */ +int +__posix_openpt (int oflag) +{ + static int have_no_dev_ptmx; + int fd; + + if (!have_no_dev_ptmx) + { + fd = __open (_PATH_DEVPTMX, oflag); + if (fd != -1) + { + struct statfs fsbuf; + static int devpts_mounted; + + /* Check that the /dev/pts filesystem is mounted + or if /dev is a devfs filesystem (this implies /dev/pts). */ + if (devpts_mounted + || (__statfs (_PATH_DEVPTS, &fsbuf) == 0 + && fsbuf.f_type == DEVPTS_SUPER_MAGIC) + || (__statfs (_PATH_DEV, &fsbuf) == 0 + && fsbuf.f_type == DEVFS_SUPER_MAGIC)) + { + /* Everything is ok. */ + devpts_mounted = 1; + return fd; + } + + /* If /dev/pts is not mounted then the UNIX98 pseudo terminals + are not usable. */ + __close (fd); + have_no_dev_ptmx = 1; + __set_errno (ENOENT); + } + else + { + if (errno == ENOENT || errno == ENODEV) + have_no_dev_ptmx = 1; + else + return -1; + } + } + else + __set_errno (ENOENT); + + return -1; +} +weak_alias (__posix_openpt, posix_openpt) + + +int +__getpt (void) +{ + int fd = __posix_openpt (O_RDWR); + if (fd == -1) + fd = __bsd_getpt (); + return fd; +} + + +#define PTYNAME1 "pqrstuvwxyzabcde"; +#define PTYNAME2 "0123456789abcdef"; + +#define __getpt __bsd_getpt +#define HAVE_POSIX_OPENPT +#include <sysdeps/unix/bsd/getpt.c> |