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

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>