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-rw-r--r--nis/lckcache.c181
1 files changed, 0 insertions, 181 deletions
diff --git a/nis/lckcache.c b/nis/lckcache.c
deleted file mode 100644
index f8c0a97296..0000000000
--- a/nis/lckcache.c
+++ /dev/null
@@ -1,181 +0,0 @@
-/* Handle locking of NIS+ cache file.
-   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
-   This file is part of the GNU C Library and based on shadow/lckfile.c.
-
-   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 <fcntl.h>
-#include <bits/libc-lock.h>
-#include <shadow.h>
-#include <signal.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/file.h>
-#include <rpcsvc/nis.h>
-#include <rpcsvc/nislib.h>
-#include <rpcsvc/nis_cache.h>
-
-/* How long to wait for getting the lock before returning with an
-   error.  */
-#define TIMEOUT 5 /* sec */
-
-
-/* File descriptor for lock file.  */
-static int lock_fd = -1;
-
-/* Prevent problems in multithreaded program by using mutex.  */
-__libc_lock_define_initialized (static, lock)
-
-
-/* Prototypes for local functions.  */
-static void noop_handler __P ((int __sig));
-
-
-/* We cannot simply return in error cases.  We have to close the file
-   and perhaps restore the signal handler.  */
-#define RETURN_CLOSE_FD(code)						      \
-  do {									      \
-    if ((code) < 0 && lock_fd >= 0)					      \
-      {									      \
-	close (lock_fd);						      \
-	lock_fd = -1;							      \
-      }									      \
-    __libc_lock_unlock (lock);						      \
-    return (code);							      \
-  } while (0)
-
-#define RETURN_RESTORE_HANDLER(code)					      \
-  do {									      \
-    /* Restore old action handler for alarm.  We don't need to know	      \
-       about the current one.  */					      \
-    sigaction (SIGALRM, &saved_act, NULL);				      \
-    RETURN_CLOSE_FD (code);						      \
-  } while (0)
-
-#define RETURN_CLEAR_ALARM(code)					      \
-  do {									      \
-    /* Clear alarm.  */							      \
-    alarm (0);								      \
-    /* Restore old set of handled signals.  We don't need to know	      \
-       about the current one.*/						      \
-    sigprocmask (SIG_SETMASK, &saved_set, NULL);			      \
-    RETURN_RESTORE_HANDLER (code);					      \
-  } while (0)
-
-
-int
-__nis_lock_cache (void)
-{
-  int flags;
-  sigset_t saved_set;			/* Saved set of caught signals.  */
-  struct sigaction saved_act;		/* Saved signal action.  */
-  sigset_t new_set;			/* New set of caught signals.  */
-  struct sigaction new_act;		/* New signal action.  */
-  struct flock fl;			/* Information struct for locking.  */
-  int result;
-
-  if (lock_fd != -1)
-    /* Still locked by own process.  */
-    return -1;
-
-  /* Prevent problems caused by multiple threads.  */
-  __libc_lock_lock (lock);
-
-  lock_fd = open (CACHELOCK, O_RDONLY|O_CREAT, 0666);
-  if (lock_fd == -1)
-    /* Cannot create lock file.  */
-    RETURN_CLOSE_FD (-1);
-
-  /* Make sure file gets correctly closed when process finished.  */
-  flags = fcntl (lock_fd, F_GETFD, 0);
-  if (flags == -1)
-    /* Cannot get file flags.  */
-    RETURN_CLOSE_FD (-1);
-  flags |= FD_CLOEXEC;		/* Close on exit.  */
-  if (fcntl (lock_fd, F_SETFD, flags) < 0)
-    /* Cannot set new flags.  */
-    RETURN_CLOSE_FD (-1);
-
-  /* Now we have to get exclusive write access.  Since multiple
-     process could try this we won't stop when it first fails.
-     Instead we set a timeout for the system call.  Once the timer
-     expires it is likely that there are some problems which cannot be
-     resolved by waiting.
-
-     It is important that we don't change the signal state.  We must
-     restore the old signal behaviour.  */
-  memset (&new_act, '\0', sizeof (struct sigaction));
-  new_act.sa_handler = noop_handler;
-  sigfillset (&new_act.sa_mask);
-  new_act.sa_flags = 0ul;
-
-  /* Install new action handler for alarm and save old.  */
-  if (sigaction (SIGALRM, &new_act, &saved_act) < 0)
-    /* Cannot install signal handler.  */
-    RETURN_CLOSE_FD (-1);
-
-  /* Now make sure the alarm signal is not blocked.  */
-  sigemptyset (&new_set);
-  sigaddset (&new_set, SIGALRM);
-  if (sigprocmask (SIG_UNBLOCK, &new_set, &saved_set) < 0)
-    RETURN_RESTORE_HANDLER (-1);
-
-  /* Start timer.  If we cannot get the lock in the specified time we
-     get a signal.  */
-  alarm (TIMEOUT);
-
-  /* Try to get the lock.  */
-  memset (&fl, '\0', sizeof (struct flock));
-  fl.l_type = F_RDLCK;
-  fl.l_whence = SEEK_SET;
-  result = fcntl (lock_fd, F_SETLKW, &fl);
-
-  RETURN_CLEAR_ALARM (result);
-}
-
-
-int
-__nis_unlock_cache ()
-{
-  int result;
-
-  if (lock_fd == -1)
-    /* There is no lock set.  */
-    result = -1;
-  else
-    {
-      /* Prevent problems caused by multiple threads.  */
-      __libc_lock_lock (lock);
-
-      result = close (lock_fd);
-
-      /* Mark descriptor as unused.  */
-      lock_fd = -1;
-
-      /* Clear mutex.  */
-      __libc_lock_unlock (lock);
-    }
-
-  return result;
-}
-
-
-static void
-noop_handler (sig)
-     int sig;
-{
-  /* We simply return which makes the `fcntl' call return with an error.  */
-}