Back out nptl changes, which for now will be done in branches/uClibc-nptl

1 files changed, 0 insertions, 404 deletions

diff --git a/libpthread/nptl/sem_open.c b/libpthread/nptl/sem_open.c
deleted file mode 100644
index a4b2f5b3a..000000000
--- a/libpthread/nptl/sem_open.c
+++ /dev/null
@@ -1,404 +0,0 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; 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 <mntent.h>
-#include <paths.h>
-#include <pthread.h>
-#include <search.h>
-#include <semaphore.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <sys/statfs.h>
-#include <linux_fsinfo.h>
-#include "semaphoreP.h"
-
-
-
-/* Information about the mount point.  */
-struct mountpoint_info mountpoint attribute_hidden;
-
-/* This is the default mount point.  */
-static const char defaultmount[] = "/dev/shm";
-/* This is the default directory.  */
-static const char defaultdir[] = "/dev/shm/sem.";
-
-/* Protect the `mountpoint' variable above.  */
-pthread_once_t __namedsem_once attribute_hidden = PTHREAD_ONCE_INIT;
-
-
-/* Determine where the shmfs is mounted (if at all).  */
-void
-attribute_hidden
-__where_is_shmfs (void)
-{
-  char buf[512];
-  struct statfs f;
-  struct mntent resmem;
-  struct mntent *mp;
-  FILE *fp;
-
-  /* The canonical place is /dev/shm.  This is at least what the
-     documentation tells everybody to do.  */
-  if (__statfs (defaultmount, &f) == 0 && f.f_type == SHMFS_SUPER_MAGIC)
-    {
-      /* It is in the normal place.  */
-      mountpoint.dir = (char *) defaultdir;
-      mountpoint.dirlen = sizeof (defaultdir) - 1;
-
-      return;
-    }
-
-  /* OK, do it the hard way.  Look through the /proc/mounts file and if
-     this does not exist through /etc/fstab to find the mount point.  */
-  fp = __setmntent ("/proc/mounts", "r");
-  if (__builtin_expect (fp == NULL, 0))
-    {
-      fp = __setmntent (_PATH_MNTTAB, "r");
-      if (__builtin_expect (fp == NULL, 0))
-	/* There is nothing we can do.  Blind guesses are not helpful.  */
-	return;
-    }
-
-  /* Now read the entries.  */
-  while ((mp = __getmntent_r (fp, &resmem, buf, sizeof buf)) != NULL)
-    /* The original name is "shm" but this got changed in early Linux
-       2.4.x to "tmpfs".  */
-    if (strcmp (mp->mnt_type, "tmpfs") == 0
-	|| strcmp (mp->mnt_type, "shm") == 0)
-      {
-	/* Found it.  There might be more than one place where the
-           filesystem is mounted but one is enough for us.  */
-	size_t namelen;
-
-	/* First make sure this really is the correct entry.  At least
-	   some versions of the kernel give wrong information because
-	   of the implicit mount of the shmfs for SysV IPC.  */
-	if (__statfs (mp->mnt_dir, &f) != 0 || f.f_type != SHMFS_SUPER_MAGIC)
-	  continue;
-
-	namelen = strlen (mp->mnt_dir);
-
-	if (namelen == 0)
-	  /* Hum, maybe some crippled entry.  Keep on searching.  */
-	  continue;
-
-	mountpoint.dir = (char *) malloc (namelen + 4 + 2);
-	if (mountpoint.dir != NULL)
-	  {
-	    char *cp = __mempcpy (mountpoint.dir, mp->mnt_dir, namelen);
-	    if (cp[-1] != '/')
-	      *cp++ = '/';
-	    cp = stpcpy (cp, "sem.");
-	    mountpoint.dirlen = cp - mountpoint.dir;
-	  }
-
-	break;
-      }
-
-  /* Close the stream.  */
-  __endmntent (fp);
-}
-
-
-/* Comparison function for search of existing mapping.  */
-int
-attribute_hidden
-__sem_search (const void *a, const void *b)
-{
-  const struct inuse_sem *as = (const struct inuse_sem *) a;
-  const struct inuse_sem *bs = (const struct inuse_sem *) b;
-
-  if (as->ino != bs->ino)
-    /* Cannot return the difference the type is larger than int.  */
-    return as->ino < bs->ino ? -1 : (as->ino == bs->ino ? 0 : 1);
-
-  if (as->dev != bs->dev)
-    /* Cannot return the difference the type is larger than int.  */
-    return as->dev < bs->dev ? -1 : (as->dev == bs->dev ? 0 : 1);
-
-  return strcmp (as->name, bs->name);
-}
-
-
-/* The search tree for existing mappings.  */
-void *__sem_mappings attribute_hidden;
-
-/* Lock to protect the search tree.  */
-lll_lock_t __sem_mappings_lock = LLL_LOCK_INITIALIZER;
-
-
-/* Search for existing mapping and if possible add the one provided.  */
-static sem_t *
-check_add_mapping (const char *name, size_t namelen, int fd, sem_t *existing)
-{
-  sem_t *result = SEM_FAILED;
-
-  /* Get the information about the file.  */
-  struct stat64 st;
-  if (__fxstat64 (_STAT_VER, fd, &st) == 0)
-    {
-      /* Get the lock.  */
-      lll_lock (__sem_mappings_lock);
-
-      /* Search for an existing mapping given the information we have.  */
-      struct inuse_sem *fake;
-      fake = (struct inuse_sem *) alloca (sizeof (*fake) + namelen);
-      memcpy (fake->name, name, namelen);
-      fake->dev = st.st_dev;
-      fake->ino = st.st_ino;
-
-      struct inuse_sem **foundp = tfind (fake, &__sem_mappings, __sem_search);
-      if (foundp != NULL)
-	{
-	  /* There is already a mapping.  Use it.  */
-	  result = (*foundp)->sem;
-	  ++(*foundp)->refcnt;
-	}
-      else
-	{
-	  /* We haven't found a mapping.  Install ione.  */
-	  struct inuse_sem *newp;
-
-	  newp = (struct inuse_sem *) malloc (sizeof (*newp) + namelen);
-	  if (newp != NULL)
-	    {
-	      /* If the caller hasn't provided any map it now.  */
-	      if (existing == SEM_FAILED)
-		existing = (sem_t *) mmap (NULL, sizeof (sem_t),
-					   PROT_READ | PROT_WRITE, MAP_SHARED,
-					   fd, 0);
-
-	      newp->dev = st.st_dev;
-	      newp->ino = st.st_ino;
-	      newp->refcnt = 1;
-	      newp->sem = existing;
-	      memcpy (newp->name, name, namelen);
-
-	      /* Insert the new value.  */
-	      if (existing != MAP_FAILED
-		  && tsearch (newp, &__sem_mappings, __sem_search) != NULL)
-		/* Successful.  */
-		result = existing;
-	      else
-		/* Something went wrong while inserting the new
-		   value.  We fail completely.  */
-		free (newp);
-	    }
-	}
-
-      /* Release the lock.  */
-      lll_unlock (__sem_mappings_lock);
-    }
-
-  if (result != existing && existing != SEM_FAILED && existing != MAP_FAILED)
-    {
-      /* Do not disturb errno.  */
-      INTERNAL_SYSCALL_DECL (err);
-      INTERNAL_SYSCALL (munmap, err, 2, existing, sizeof (sem_t));
-    }
-
-  return result;
-}
-
-
-sem_t *
-sem_open (const char *name, int oflag, ...)
-{
-  char *finalname;
-  sem_t *result = SEM_FAILED;
-  int fd;
-
-  /* Determine where the shmfs is mounted.  */
-  INTUSE(__pthread_once) (&__namedsem_once, __where_is_shmfs);
-
-  /* If we don't know the mount points there is nothing we can do.  Ever.  */
-  if (mountpoint.dir == NULL)
-    {
-      __set_errno (ENOSYS);
-      return SEM_FAILED;
-    }
-
-  /* Construct the filename.  */
-  while (name[0] == '/')
-    ++name;
-
-  if (name[0] == '\0')
-    {
-      /* The name "/" is not supported.  */
-      __set_errno (EINVAL);
-      return SEM_FAILED;
-    }
-  size_t namelen = strlen (name) + 1;
-
-  /* Create the name of the final file.  */
-  finalname = (char *) alloca (mountpoint.dirlen + namelen);
-  __mempcpy (__mempcpy (finalname, mountpoint.dir, mountpoint.dirlen),
-	     name, namelen);
-
-  /* If the semaphore object has to exist simply open it.  */
-  if ((oflag & O_CREAT) == 0 || (oflag & O_EXCL) == 0)
-    {
-    try_again:
-      fd = __libc_open (finalname,
-			(oflag & ~(O_CREAT|O_ACCMODE)) | O_NOFOLLOW | O_RDWR);
-
-      if (fd == -1)
-	{
-	  /* If we are supposed to create the file try this next.  */
-	  if ((oflag & O_CREAT) != 0 && errno == ENOENT)
-	    goto try_create;
-
-	  /* Return.  errno is already set.  */
-	}
-      else
-	/* Check whether we already have this semaphore mapped and
-	   create one if necessary.  */
-	result = check_add_mapping (name, namelen, fd, SEM_FAILED);
-    }
-  else
-    {
-      /* We have to open a temporary file first since it must have the
-	 correct form before we can start using it.  */
-      char *tmpfname;
-      mode_t mode;
-      unsigned int value;
-      va_list ap;
-
-    try_create:
-      va_start (ap, oflag);
-
-      mode = va_arg (ap, mode_t);
-      value = va_arg (ap, unsigned int);
-
-      va_end (ap);
-
-      if (value > SEM_VALUE_MAX)
-	{
-	  __set_errno (EINVAL);
-	  return SEM_FAILED;
-	}
-
-      /* Create the initial file content.  */
-      sem_t initsem;
-
-      struct sem *iinitsem = (struct sem *) &initsem;
-      iinitsem->count = value;
-
-      /* Initialize the remaining bytes as well.  */
-      memset ((char *) &initsem + sizeof (struct sem), '\0',
-	      sizeof (sem_t) - sizeof (struct sem));
-
-      tmpfname = (char *) alloca (mountpoint.dirlen + 6 + 1);
-      char *xxxxxx = __mempcpy (tmpfname, mountpoint.dir, mountpoint.dirlen);
-
-      int retries = 0;
-#define NRETRIES 50
-      while (1)
-	{
-	  /* Add the suffix for mktemp.  */
-	  strcpy (xxxxxx, "XXXXXX");
-
-	  /* We really want to use mktemp here.  We cannot use mkstemp
-	     since the file must be opened with a specific mode.  The
-	     mode cannot later be set since then we cannot apply the
-	     file create mask.  */
-	  if (mktemp (tmpfname) == NULL)
-	    return SEM_FAILED;
-
-	  /* Open the file.  Make sure we do not overwrite anything.  */
-	  fd = __libc_open (tmpfname, O_RDWR | O_CREAT | O_EXCL, mode);
-	  if (fd == -1)
-	    {
-	      if (errno == EEXIST)
-		{
-		  if (++retries < NRETRIES)
-		    continue;
-
-		  __set_errno (EAGAIN);
-		}
-
-	      return SEM_FAILED;
-	    }
-
-	  /* We got a file.  */
-	  break;
-	}
-
-      if (TEMP_FAILURE_RETRY (__libc_write (fd, &initsem, sizeof (sem_t)))
-	  == sizeof (sem_t)
-	  /* Map the sem_t structure from the file.  */
-	  && (result = (sem_t *) mmap (NULL, sizeof (sem_t),
-				       PROT_READ | PROT_WRITE, MAP_SHARED,
-				       fd, 0)) != MAP_FAILED)
-	{
-	  /* Create the file.  Don't overwrite an existing file.  */
-	  if (link (tmpfname, finalname) != 0)
-	    {
-	      /* Undo the mapping.  */
-	      (void) munmap (result, sizeof (sem_t));
-
-	      /* Reinitialize 'result'.  */
-	      result = SEM_FAILED;
-
-	      /* This failed.  If O_EXCL is not set and the problem was
-		 that the file exists, try again.  */
-	      if ((oflag & O_EXCL) == 0 && errno == EEXIST)
-		{
-		  /* Remove the file.  */
-		  (void) unlink (tmpfname);
-
-		  /* Close the file.  */
-		  (void) __libc_close (fd);
-
-		  goto try_again;
-		}
-	    }
-	  else
-	    /* Insert the mapping into the search tree.  This also
-	       determines whether another thread sneaked by and already
-	       added such a mapping despite the fact that we created it.  */
-	    result = check_add_mapping (name, namelen, fd, result);
-	}
-
-      /* Now remove the temporary name.  This should never fail.  If
-	 it fails we leak a file name.  Better fix the kernel.  */
-      (void) unlink (tmpfname);
-    }
-
-  /* Map the mmap error to the error we need.  */
-  if (MAP_FAILED != (void *) SEM_FAILED && result == MAP_FAILED)
-    result = SEM_FAILED;
-
-  /* We don't need the file descriptor anymore.  */
-  if (fd != -1)
-    {
-      /* Do not disturb errno.  */
-      INTERNAL_SYSCALL_DECL (err);
-      INTERNAL_SYSCALL (close, err, 1, fd);
-    }
-
-  return result;
-}