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.

10 files changed, 498 insertions, 184 deletions

diff --git a/sysdeps/unix/bsd/getpt.c b/sysdeps/unix/bsd/getpt.c
index 3bc34b1814..ec339c8335 100644
--- a/sysdeps/unix/bsd/getpt.c
+++ b/sysdeps/unix/bsd/getpt.c
@@ -17,43 +17,67 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#include <sys/types.h>
-#include <fcntl.h>
 #include <errno.h>
-#include <stdlib.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+
+
+/* Prefix for master pseudo terminal nodes.  */
+#define _PATH_PTY "/dev/pty"
 
-#include "pty-internal.h"
 
-/* Per the FreeBSD-3.0 manpages: pty masters are named
-   /dev/pty[p-sP-S][0-9a-v].  I hope EIO is the right
-   errno in the "already open" case; it doesn't say.  */
-static const char pn1[] = "pqrsPQRS";
-static const char pn2[] = "0123456789abcdefghijklmnopqrstuv";
+/* Letters indicating a series of pseudo terminals.  */
+#ifndef PTYNAME1
+#define PTYNAME1 "pqrsPQRS"
+#endif
+const char *__libc_ptyname1 = PTYNAME1;
 
-/* Open the master side of a pseudoterminal and return its file
-   descriptor, or -1 on error.  BSD version.  */
+/* Letters indicating the position within a series.  */
+#ifndef PTYNAME2
+#define PTYNAME2 "0123456789abcdefghijklmnopqrstuv";
+#endif
+const char *__libc_ptyname2 = PTYNAME2;
+
+
+/* Open a master pseudo terminal and return its file descriptor.  */
 int
-__getpt ()
+__getpt (void)
 {
-  int fd;
-  const char *i, *j;
-  char namebuf[PTYNAMELEN];
+  char buf[sizeof (_PATH_PTY) + 2];
+  const char *p, *q;
+  char *s;
+  
+  s = __stpcpy (buf, _PATH_PTY);
+  s[0] = '?';
+  s[1] = '?';
+  s[2] = 0;
 
-  strcpy (namebuf, "/dev/pty");
-  namebuf[10] = '\0';
-  for (i = pn1; *i; ++i)
+  for (p = __libc_ptyname1; *p; p++)
     {
-      namebuf[8] = *i;
-      for (j = pn2; *j; ++j)
-        {
-	  namebuf[9] = *j;
-	  fd = open (namebuf, O_RDWR);
+      s[0] = *p;
+
+      for (q = __libc_ptyname2; *q; q++)
+	{
+	  int fd;
+	  
+	  s[1] = *q;
+	  
+	  fd = __open (buf, O_RDWR);
 	  if (fd != -1)
-	    return fd;
+	    {
+	      if (__isatty (fd))
+		return fd;
+	      
+	      __close (fd);
+	      continue;
+	    }
+	  
 	  if (errno != EIO)
 	    return -1;
-        }
+	}
     }
+
   __set_errno (ENFILE);
   return -1;
 }
diff --git a/sysdeps/unix/bsd/ptsname.c b/sysdeps/unix/bsd/ptsname.c
new file mode 100644
index 0000000000..83e3890e7c
--- /dev/null
+++ b/sysdeps/unix/bsd/ptsname.c
@@ -0,0 +1,78 @@
+/* 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 <errno.h>
+#include <paths.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+/* Static buffer for `ptsname'.  */
+static char buffer[sizeof (_PATH_TTY) + 2];
+
+
+/* Return the pathname of the pseudo terminal slave assoicated with
+   the master FD is open on, or NULL on errors.
+   The returned storage is good until the next call to this function.  */
+char *
+ptsname (int fd)
+{
+  return __ptsname_r (fd, buffer, sizeof (buffer)) != 0 ? NULL : buffer;
+}
+
+
+/* Store at most BUFLEN characters of the pathname of the slave pseudo
+   terminal associated with the master FD is open on in BUF.
+   Return 0 on success, otherwise an error number.  */
+int
+__ptsname_r (int fd, char *buf, size_t buflen)
+{
+  int save_errno = errno;
+  struct stat st;
+
+  if (buf == NULL)
+    {
+      __set_errno (EINVAL);
+      return EINVAL;
+    }
+
+  if (!__isatty (fd))
+    {
+      __set_errno (ENOTTY);
+      return ENOTTY;
+    }
+
+  if (buflen < strlen (_PATH_TTY) + 3)
+    {
+      __set_errno (ERANGE);
+      return ERANGE;
+    }
+  
+  if (__ttyname_r (fd, buf, buflen) != 0)
+    return errno;
+
+  buf[sizeof (_PATH_DEV) - 1] = 't';
+  
+  if (__stat (buf, &st) < 0)
+    return errno;
+
+  __set_errno (save_errno);
+  return 0;
+}
+weak_alias (__ptsname_r, ptsname_r)
diff --git a/sysdeps/unix/bsd/unlockpt.c b/sysdeps/unix/bsd/unlockpt.c
index b25231c865..de4db5a48e 100644
--- a/sysdeps/unix/bsd/unlockpt.c
+++ b/sysdeps/unix/bsd/unlockpt.c
@@ -17,25 +17,21 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#include <paths.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 
-#include "pty-internal.h"
-
-/* Given a fd on a master pseudoterminal, clear a kernel lock so that
-   the slave can be opened.  This is to avoid a race between opening the
-   master and calling grantpt() to take possession of the slave.
-
-   BSD doesn't have this lock, but what it does have is revoke(). */
 
+/* Unlock the slave pseudo terminal associated with the master pseudo
+   terminal specified by FD.  */
 int
-unlockpt (fd)
-     int fd;
+unlockpt (int fd)
 {
-  char buf[PTYNAMELEN];
+  char buf[sizeof (_PATH_TTY) + 2];
 
-  if (__ptsname_r (fd, buf, PTYNAMELEN))
+  /* BSD doesn't have a lock, but it does have `revoke'.  */
+  if (__ptsname_r (fd, buf, sizeof (buf)))
     return -1;
-
   return revoke (buf);
 }
diff --git a/sysdeps/unix/grantpt.c b/sysdeps/unix/grantpt.c
index 5d33a515f1..d216baa476 100644
--- a/sysdeps/unix/grantpt.c
+++ b/sysdeps/unix/grantpt.c
@@ -17,65 +17,158 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#include <assert.h>
 #include <errno.h>
+#include <grp.h>
+#include <limits.h>
 #include <stdlib.h>
-#include <unistd.h>
+#include <string.h>
 #include <sys/resource.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <unistd.h>
 
-#include <assert.h>
+#include "pty-private.h"
+
+
+/* Return the result of ptsname_r in the buffer pointed to by PTS,
+   which should be of length BUF_LEN.  If it is too long to fit in
+   this buffer, a sufficiently long buffer is allocated using malloc,
+   and returned in PTS.  0 is returned upon success, -1 otherwise.  */
+static int
+pts_name (int fd, char **pts, size_t buf_len)
+{
+  int rv;
+  char *buf = *pts;
+
+  for (;;)
+    {
+      char *new_buf;
+
+      if (buf_len)
+	{
+	  rv = ptsname_r (fd, buf, buf_len);
+
+	  if (rv != 0 || memchr (buf, '\0', buf_len))
+	    /* We either got an error, or we succeeded and the
+	       returned name fit in the buffer.  */
+	    break;
+
+	  /* Try again with a longer buffer.  */
+	  buf_len += buf_len;	/* Double it */
+	}
+      else
+	/* No initial buffer; start out by mallocing one.  */
+	buf_len = 128;		/* First time guess.  */
 
-#include "pty-internal.h"
+      if (buf != *pts)
+	/* We've already malloced another buffer at least once.  */
+	new_buf = realloc (buf, buf_len);
+      else
+	new_buf = malloc (buf_len);
+      if (! new_buf)
+	{
+	  rv = -1;
+	  __set_errno (ENOMEM);
+	  break;
+	}
+      buf = new_buf;
+    }
 
-/* Given a fd on a master pseudoterminal, chown the file associated
-   with the slave to the calling process, and set its group and
-   mode appropriately.  Note that this is an unprivileged operation. */
+  if (rv == 0)
+    *pts = buf;		/* Return buffer to the user.  */
+  else if (buf != *pts)
+    free (buf);		/* Free what we malloced when returning an error.  */
 
-/* This "generic Unix" implementation works because we provide the program
-   /usr/libexec/pt_chown, and it only depends on ptsname() working. */
-static const char helper[] = LIBEXECDIR "/pt_chown";
-static const char *const argv[] = { "pt_chown", NULL };
+  return rv;
+}
 
+/* Change the ownership and access permission of the slave pseudo
+   terminal associated with the master pseudo terminal specified
+   by FD.  */
 int
-grantpt (fd)
-     int fd;
+grantpt (int fd)
 {
+#ifdef PATH_MAX
+  char _buf[PATH_MAX];
+#else
+  char _buf[512];
+#endif
+  char *buf = _buf;
   struct stat st;
-  int w, pid;
-  char namebuf[PTYNAMELEN];
-
-  /* Some systems do it for us.  */
-  if (__ptsname_r (fd, namebuf, PTYNAMELEN) != 0)
+  char *grtmpbuf;
+  struct group grbuf;
+  size_t grbuflen = __sysconf (_SC_GETGR_R_SIZE_MAX);
+  struct group *p;
+  uid_t uid;
+  gid_t gid;
+  pid_t pid;
+
+  if (pts_name (fd, &buf, sizeof (_buf)))
     return -1;
-  if (__xstat (_STAT_VER, namebuf, &st) != 0)
+  
+  if (__stat (buf, &st) < 0)
     return -1;
 
-  if (st.st_uid == __getuid ())
-    return 0;
+  /* Make sure that we own the device.  */
+  uid = __getuid ();
+  if (st.st_uid != uid)
+    {
+      if (__chown (buf, uid, st.st_gid) < 0)
+	goto helper;
+    }
+
+  /* Get the group ID of the special `tty' group.  */
+  if (grbuflen == -1)
+    /* `sysconf' does not support _SC_GETGR_R_SIZE_MAX.
+       Try a moderate value.  */
+    grbuflen = 1024;
+  grtmpbuf = (char *) __alloca (grbuflen);
+  getgrnam_r (TTY_GROUP, &grbuf, grtmpbuf, grbuflen, &p);
+  gid = p ? p->gr_gid : __getgid ();
+
+  /* Make sure the group of the device is that special group.  */
+  if (st.st_gid != gid)
+    {
+      if (__chown (buf, uid, gid) < 0)
+	goto helper;
+    }
+
+  /* Make sure the permission mode is set to readable and writable by
+     the owner, and writable by the group.  */
+  if ((st.st_mode & ACCESSPERMS) != (S_IRUSR|S_IWUSR|S_IWGRP))
+    {
+      if (__chmod (buf, S_IRUSR|S_IWUSR|S_IWGRP) < 0)
+	goto helper;
+    }
+
+  return 0;
 
-  /* We have to do it in user space.  */
+  /* We have to use the helper program.  */
+ helper:
 
   pid = __fork ();
   if (pid == -1)
     return -1;
   else if (pid == 0)
     {
-      /* Disable core dumps in the child.  */
-      struct rlimit off = { 0, 0 };
-      setrlimit (RLIMIT_CORE, &off);
+      /* Disable core dumps.  */
+      struct rlimit rl = { 0, 0 };
+      setrlimit (RLIMIT_CORE, &rl);
 
-      /* The helper does its thing on fd PTY_FD.  */
-      if (fd != PTY_FD)
-	if (__dup2 (fd, PTY_FD) == -1)
+      /* We pase the master pseudo terminal as file descriptor PTY_FILENO.  */
+      if (fd != PTY_FILENO)
+	if (__dup2 (fd, PTY_FILENO) < 0)
 	  _exit (FAIL_EBADF);
 
-      __execve (helper, (char *const *) argv, 0);
+      execle (_PATH_PT_CHOWN, basename (_PATH_PT_CHOWN), NULL, NULL);
       _exit (FAIL_EXEC);
     }
   else
     {
+      int w;
+      
       if (__waitpid (pid, &w, 0) == -1)
 	return -1;
       if (!WIFEXITED (w))
@@ -106,6 +199,5 @@ grantpt (fd)
 	  }
     }
 
-  /* Success.  */
   return 0;
 }
diff --git a/sysdeps/unix/sysv/linux/getpt.c b/sysdeps/unix/sysv/linux/getpt.c
index 0f5949d1bc..8165eccc1b 100644
--- a/sysdeps/unix/sysv/linux/getpt.c
+++ b/sysdeps/unix/sysv/linux/getpt.c
@@ -17,33 +17,26 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#include <sys/types.h>
-#include <fcntl.h>
 #include <errno.h>
+#include <fcntl.h>
 #include <stdlib.h>
-#include <string.h>
 
-#include "pty-internal.h"
+/* Path to the master pseudo terminal cloning device.  */
+#define _PATH_DEVPTMX "/dev/ptmx"
 
-/* Per Documentation/devices.txt: pty masters are /dev/pty[p-za-e][0-9a-f].
-   These strings are used also in ptsname.c. */
-const char __ptyname1[] = "pqrstuvwxyzabcde";
-const char __ptyname2[] = "0123456789abcdef";
+/* Prototype for function that opens BSD-style master pseudo-terminals.  */
+int __bsd_getpt (void);
 
-/* Open the master side of a pseudoterminal and return its file
-   descriptor, or -1 on error.  Linux version. */
+/* Open a master pseudo terminal and return its file descriptor.  */
 int
-__getpt ()
+__getpt (void)
 {
-  int fd;
-  const char *i, *j;
   static int have_dev_ptmx = 1;
-  char namebuf[PTYNAMELEN];
+  int fd;
 
-  /* The new way:  */
   if (have_dev_ptmx)
     {
-      fd = __open ("/dev/ptmx", O_RDWR);
+      fd = __open (_PATH_DEVPTMX, O_RDWR);
       if (fd != -1)
 	return fd;
       else
@@ -55,23 +48,11 @@ __getpt ()
 	}
     }
 
-  /* The old way: */
-  strcpy (namebuf, "/dev/pty");
-  namebuf[10] = '\0';
-  for (i = __ptyname1; *i; ++i)
-    {
-      namebuf[8] = *i;
-      for (j = __ptyname2; *j; ++j)
-        {
-	  namebuf[9] = *j;
-	  fd = __open (namebuf, O_RDWR);
-	  if (fd != -1)
-	    return fd;
-	  if (errno != EIO)
-	    return -1;
-        }
-    }
-  __set_errno (ENFILE);
-  return -1;
+  return __bsd_getpt ();
 }
-weak_alias (__getpt, getpt)
+
+#define PTYNAME1 "pqrstuvwxyzabcde";
+#define PTYNAME2 "0123456789abcdef";
+
+#define __getpt __bsd_getpt
+#include <sysdeps/unix/bsd/getpt.c>
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>
diff --git a/sysdeps/unix/sysv/linux/ptsname.c b/sysdeps/unix/sysv/linux/ptsname.c
index 052516c7ac..048ac96551 100644
--- a/sysdeps/unix/sysv/linux/ptsname.c
+++ b/sysdeps/unix/sysv/linux/ptsname.c
@@ -17,50 +17,50 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#include <sys/types.h>
+#include <errno.h>
+#include <paths.h>
+#include <stdlib.h>
+#include <string.h>
 #include <sys/ioctl.h>
 #include <sys/stat.h>
+#include <sys/sysmacros.h>
 #include <termios.h>
-#include <string.h>
-#include <errno.h>
-#include <stdlib.h>
 #include <unistd.h>
 
-#include "pty-internal.h"
-
 #include <stdio-common/_itoa.h>
-#include <sys/sysmacros.h>
 
-/* Given the file descriptor of a master pty, return the pathname
-   of the associated slave.  */
+/* Directory where we can find the slave pty nodes.  */
+#define _PATH_DEVPTS "/dev/pts/"
 
-static char namebuf[PTYNAMELEN];
-extern const char __ptyname1[], __ptyname2[]; /* Defined in getpt.c.  */
+/* The are declared in getpt.c.  */
+extern const char *__libc_ptyname1;
+extern const char *__libc_ptyname2;
 
+/* Static buffer for `ptsname'.  */
+static char buffer[sizeof (_PATH_DEVPTS) + 20];
+
+
+/* Return the pathname of the pseudo terminal slave assoicated with
+   the master FD is open on, or NULL on errors.
+   The returned storage is good until the next call to this function.  */
 char *
-ptsname (fd)
-     int fd;
+ptsname (int fd)
 {
-  return __ptsname_r (fd, namebuf, PTYNAMELEN) != 0 ? NULL : namebuf;
+  return __ptsname_r (fd, buffer, sizeof (buffer)) != 0 ? NULL : buffer;
 }
 
+
+/* Store at most BUFLEN characters of the pathname of the slave pseudo
+   terminal associated with the master FD is open on in BUF.
+   Return 0 on success, otherwise an error number.  */
 int
-__ptsname_r (fd, buf, buflen)
-     int fd;
-     char *buf;
-     size_t buflen;
+__ptsname_r (int fd, char *buf, size_t buflen)
 {
+  int save_errno = errno;
   struct stat st;
-  int save = errno;
   int ptyno;
-  char nbuf[PTYNAMELEN], idbuf[6];
-  char *cp;
-
-#ifdef TIOCGPTN
-  static int tiocgptn_works = 1;
-#endif
-
-  if (!buf)
+  
+  if (buf == NULL)
     {
       __set_errno (EINVAL);
       return EINVAL;
@@ -73,61 +73,60 @@ __ptsname_r (fd, buf, buflen)
     }
 
 #ifdef TIOCGPTN
-  if (tiocgptn_works)
+  if (__ioctl (fd, TIOCGPTN, &ptyno) == 0)
     {
-      if (__ioctl (fd, TIOCGPTN, &ptyno) == 0)
-	goto gotit;
-      else
+      /* Buffer we use to print the number in.  For a maximum size for
+         `int' of 8 bytes we never need more than 20 digits.  */
+      char numbuf[21];
+      const char *devpts = _PATH_DEVPTS;
+      const size_t devptslen = strlen (devpts);
+      char *p;
+
+      numbuf[20] = '\0';
+      p = _itoa_word (ptyno, &numbuf[20], 10, 0);
+
+      if (buflen < devptslen + strlen (p) + 1)
 	{
-	  if(errno != EINVAL)
-	    return errno;
-	  else
-	    tiocgptn_works = 0;
+	  __set_errno (ERANGE);
+	  return ERANGE;
 	}
-    }
-#endif
-  if (__fxstat (_STAT_VER, fd, &st) < 0)
-    return errno;
 
-  ptyno = minor (st.st_rdev);
-  if (major (st.st_rdev) == 4)
-    ptyno -= 128;
-
-#ifdef TIOCGPTN
- gotit:
+      __stpcpy (__stpcpy (buf, devpts), p);
+    }
+  else if (errno == EINVAL)
 #endif
-  /* Two different possible naming schemes for pty slaves:
-     the SVr4 way.  */
-
-  idbuf[5] = '\0';
-  __stpcpy (__stpcpy (nbuf, "/dev/pts/"),
-	    _itoa_word (ptyno, &idbuf[5], 10, 0));
-  if (__xstat (_STAT_VER, nbuf, &st) < 0)
     {
-      if (errno != ENOENT)
-	return errno;
-
-      /* ...and the BSD way.  */
-      nbuf[5]  = 't';
-      nbuf[7]  = 'y';
-      nbuf[8]  = __ptyname1[ptyno / 16];
-      nbuf[9]  = __ptyname2[ptyno % 16];
-      nbuf[10] = '\0';
+      char *p;
+      
+      if (buflen < strlen (_PATH_TTY) + 3)
+	{
+	  __set_errno (ERANGE);
+	  return ERANGE;
+	}
 
-      if (__xstat (_STAT_VER, nbuf, &st) < 0)
+      if (__fstat (fd, &st) < 0)
 	return errno;
-    }
 
-  if (buflen < strlen (nbuf) + 1)
-    {
-      __set_errno (ERANGE);
-      return ERANGE;
-    }
+      ptyno = minor (st.st_rdev);
+      if (major (st.st_rdev) == 4)
+	ptyno -= 128;
 
-  cp = __stpncpy (buf, nbuf, buflen);
-  cp[0] = '\0';
+      if (ptyno / 16 >= strlen (__libc_ptyname1))
+	{
+	  __set_errno (ENOTTY);
+	  return ENOTTY;
+	}
+      
+      p = __stpcpy (buf, _PATH_TTY);
+      p[0] = __libc_ptyname1[ptyno / 16];
+      p[1] = __libc_ptyname2[ptyno % 16];
+      p[2] = '\0';
+    }
+    
+  if (__stat (buf, &st) < 0)
+    return errno;
 
-  __set_errno (save);
+  __set_errno (save_errno);
   return 0;
 }
 weak_alias (__ptsname_r, ptsname_r)
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/socket.S b/sysdeps/unix/sysv/linux/sparc/sparc64/socket.S
new file mode 100644
index 0000000000..84f2eeca2f
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/socket.S
@@ -0,0 +1,80 @@
+/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Miguel de Icaza <miguel@gnu.ai.mit.edu>, 1997.
+
+   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 <sysdep.h>
+#include <socketcall.h>
+
+#define P(a, b) P2(a, b)
+#define P2(a, b) a##b
+
+#ifndef NARGS
+#ifdef socket
+#error NARGS not defined
+#endif
+#define NARGS 3
+#endif
+
+	.text
+/* The socket-oriented system calls are handled unusually in Linux.
+   They are all gated through the single `socketcall' system call number.
+   `socketcall' takes two arguments: the first is the subcode, specifying
+   which socket function is being called; and the second is a pointer to
+   the arguments to the specific function.
+
+   The .S files for the other calls just #define socket and #include this.  */
+
+#ifndef __socket
+#define __socket P(__,socket)
+#endif
+
+.globl __socket
+ENTRY (__socket)
+
+	/* Drop up to 6 arguments (recvfrom) into the memory allocated by
+	   the caller for varargs, since that's really what we have.  */
+	stx	%o0, [%sp + STACK_BIAS + 128 + 0]
+	stx	%o1, [%sp + STACK_BIAS + 128 + 8]
+#if NARGS > 2
+	stx	%o2, [%sp + STACK_BIAS + 128 + 16]
+#if NARGS > 3
+	stx	%o3, [%sp + STACK_BIAS + 128 + 24]
+#if NARGS > 4
+	stx	%o4, [%sp + STACK_BIAS + 128 + 32]
+#if NARGS > 5
+	stx	%o5, [%sp + STACK_BIAS + 128 + 40]
+#endif
+#endif
+#endif
+#endif
+
+	mov	P(SOCKOP_,socket), %o0		/* arg 1: socket subfunction */
+	add	%sp, STACK_BIAS + 128, %o1	/* arg 2: parameter block */
+	LOADSYSCALL(socketcall)
+	ta	0x6d
+
+        bcs,pn	%xcc, 1f
+	 nop
+	retl
+	 nop
+
+1:	SYSCALL_ERROR_HANDLER
+
+END (__socket)
+
+weak_alias (__socket, socket)
diff --git a/sysdeps/unix/sysv/linux/unlockpt.c b/sysdeps/unix/sysv/linux/unlockpt.c
index e20545fe80..4df33198ef 100644
--- a/sysdeps/unix/sysv/linux/unlockpt.c
+++ b/sysdeps/unix/sysv/linux/unlockpt.c
@@ -17,33 +17,33 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#include <sys/ioctl.h>
-#include <termios.h>
 #include <errno.h>
 #include <stdlib.h>
+#include <sys/ioctl.h>
+#include <termios.h>
+
 
-/* Given a fd on a master pseudoterminal, clear a kernel lock so that
-   the slave can be opened.  This is to avoid a race between opening the
-   master and calling grantpt() to take possession of the slave.  */
+/* Unlock the slave pseudo terminal associated with the master pseudo
+   terminal specified by FD.  */
 int
-unlockpt (fd)
-     int fd __attribute__ ((unused));
+unlockpt (int fd)
 {
 #ifdef TIOCSPTLCK
-  int serrno = errno;
+  int save_errno = errno;
   int unlock = 0;
 
   if (__ioctl (fd, TIOCSPTLCK, &unlock))
     {
       if (errno == EINVAL)
 	{
-	  __set_errno (serrno);
+	  __set_errno (save_errno);
 	  return 0;
 	}
       else
 	return -1;
     }
 #endif
-  /* On pre-/dev/ptmx kernels this function should be a no-op.  */
+  /* If we have no TIOCSPTLCK ioctl, all slave pseudo terminals are
+     unlocked by default.  */
   return 0;
 }
diff --git a/sysdeps/unix/sysv/sysv4/bits/utsname.h b/sysdeps/unix/sysv/sysv4/bits/utsname.h
index bf2c0a8da5..dfe46b851b 100644
--- a/sysdeps/unix/sysv/sysv4/bits/utsname.h
+++ b/sysdeps/unix/sysv/sysv4/bits/utsname.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1995, 1996, 1997, 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
@@ -16,7 +16,7 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#ifndef _UTSNAME_H
+#ifndef _SYS_UTSNAME_H
 # error "Never include <bits/utsname.h> directly; use <sys/utsname.h> instead."
 #endif