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authorUlrich Drepper <drepper@redhat.com>1998-09-17 19:51:33 +0000
committerUlrich Drepper <drepper@redhat.com>1998-09-17 19:51:33 +0000
commit9b3c7c3c713d7018c79f0b0ca0b34d386e8a25dd (patch)
tree77802928e3a7d3163bc63c89979295da8260112a /sysdeps/unix/sysv/linux/grantpt.c
parentd8f2b9ea8cf4fb6d043f2dbbeaaca04d4fd70fc6 (diff)
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Update.
1998-09-17 19:34 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/sysv4/bits/utsname.h: Fix typo. Patch by John Tobey <jtobey@banta-im.com>. 1998-09-17 Mark Kettenis <kettenis@phys.uva.nl> * login/pty-internal.h: Removed. Moved constants related to the `grantpt' helper program protocol to ... * login/pty-private.h: ... here. New file. * sysdeps/unix/sysv/linux/ptsname.c (ptsname): Reimplementation to make the function work with kernels >= 2.1.115. * sysdeps/unix/sysv/linux/getpt.c (getpt): Reimplement to call BSD version if using the cloning device fails. * sysdeps/unix/sysv/linux/grantpt.c: New file. * sysdeps/unix/sysv/linux/unlockpt.c: General cleanup. * sysdeps/unix/bsd/getpt.c (__getpt): Largely rewritten to allow use by Linux specific code. * sysdeps/unix/bsd/unlockpt.c: General cleanup. * sysdeps/unix/grantpt.c: Largely rewritten. (pts_name): New function. (grantpt): Use pts_name, check group and permission mode in addition to owner. Try to set the owner, group and permission mode first without invoking the helper program. * login/programs/pt_chown.c: Largely rewritten. Add argp and internationalization support. Use symbolic constants instead of hardwired numbers for permission mode. * sysdeps/unix/bsd/ptsname.c: New file. 1998-09-17 22:04 Tim Waugh <tim@cyberelk.demon.co.uk> * posix/wordexp-test.c: Undo last change. * posix/wordexp.c: Undo last change.
Diffstat (limited to 'sysdeps/unix/sysv/linux/grantpt.c')
-rw-r--r--sysdeps/unix/sysv/linux/grantpt.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/grantpt.c b/sysdeps/unix/sysv/linux/grantpt.c
new file mode 100644
index 0000000000..668f13192e
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/grantpt.c
@@ -0,0 +1,64 @@
+/* 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 <limits.h>
+#include <stdlib.h>
+#include <sys/statfs.h>
+
+/* Constant that identifies the `devpts' filesystem. */
+#define DEVPTS_SUPER_MAGIC 0x1cd1
+
+/* Prototype for function that changes ownership and access permission
+ for slave pseudo terminals that do not live on a `devpts'
+ filesystem. */
+int __unix_grantpt (int fd);
+
+/* Prototype for private function that gets the name of the slave
+ pseudo terminal in a safe way. */
+static int pts_name (int fd, char **pts, size_t buf_len);
+
+/* Change the ownership and access permission of the slave pseudo
+ terminal associated with the master pseudo terminal specified
+ by FD. */
+int
+grantpt (int fd)
+{
+ struct statfs fsbuf;
+#ifdef PATH_MAX
+ char _buf[PATH_MAX];
+#else
+ char _buf[512];
+#endif
+ char *buf = _buf;
+
+ if (pts_name (fd, &buf, sizeof (_buf)))
+ return -1;
+
+ if (__statfs (buf, &fsbuf) < 0)
+ return -1;
+
+ /* If the slave pseudo terminal lives on a `devpts' filesystem, the
+ ownership and access permission are already set. */
+ if (fsbuf.f_type == DEVPTS_SUPER_MAGIC)
+ return 0;
+
+ return __unix_grantpt (fd);
+}
+
+#define grantpt __unix_grantpt
+#include <sysdeps/unix/grantpt.c>