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authorEric Andersen <andersen@codepoet.org>2001-05-08 19:58:20 +0000
committerEric Andersen <andersen@codepoet.org>2001-05-08 19:58:20 +0000
commita3e03be058a9b9a2caf36c5b18f66c0fc3df3bf0 (patch)
tree2ad333bd1e56590e981eba3c54f6057cbf5758bb /libc/stdlib/grantpt.c
parent6c0899094d50e0d35d699594bfcd9cae4164abe2 (diff)
Add in libutil, based on Cory Visi's variant of Michael Shmulevich's libutil
port. I have reworked the code quite a bit so that the stuff that is supposed to be in libc is in libc, and I added a bunch of missing stuff so the libutil interface matches that of glibc's libutil. The only caveat is that libutil/login.c is currently a stub. -Erik
Diffstat (limited to 'libc/stdlib/grantpt.c')
-rw-r--r--libc/stdlib/grantpt.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/libc/stdlib/grantpt.c b/libc/stdlib/grantpt.c
new file mode 100644
index 000000000..63f423b8f
--- /dev/null
+++ b/libc/stdlib/grantpt.c
@@ -0,0 +1,66 @@
+/* Copyright (C) 1998, 1999 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
+/* Constant that identifies the `devfs' filesystem. */
+#define DEVFS_SUPER_MAGIC 0x1373
+
+/* 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 || fsbuf.f_type == DEVFS_SUPER_MAGIC)
+ return 0;
+
+ return __unix_grantpt (fd);
+}
+
+#define grantpt __unix_grantpt
+#include <unix_grantpt.c>