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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/getpt.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/getpt.c')
-rw-r--r--libc/stdlib/getpt.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/libc/stdlib/getpt.c b/libc/stdlib/getpt.c
new file mode 100644
index 000000000..74f009a95
--- /dev/null
+++ b/libc/stdlib/getpt.c
@@ -0,0 +1,89 @@
+/* Copyright (C) 1998, 1999 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 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 <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <paths.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
+
+/* 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
+getpt (void)
+{
+ static int have_no_dev_ptmx;
+ int fd;
+
+ if (!have_no_dev_ptmx)
+ {
+ fd = open (_PATH_DEVPTMX, O_RDWR);
+ 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;
+ }
+ else
+ {
+ if (errno == ENOENT || errno == ENODEV)
+ have_no_dev_ptmx = 1;
+ else
+ return -1;
+ }
+ }
+
+ return __bsd_getpt ();
+}
+
+#define PTYNAME1 "pqrstuvwxyzabcde";
+#define PTYNAME2 "0123456789abcdef";
+
+#define __getpt __bsd_getpt
+#include <bsd_getpt.c>