From: Samba Release Account <samba-bugs@samba.org>
Date: Tue, 10 Dec 1996 17:53:00 +0000 (+0000)
Subject: Moved fcntl locking code into util.c to allow it to be
X-Git-Url: http://git.samba.org/samba.git/?p=kai%2Fsamba.git;a=commitdiff_plain;h=75e3bbc651187754fa7b0c9fb5df921c31738d65

Moved fcntl locking code into util.c to allow it to be
called from nmbd code.
jra@cygnus.com
(This used to be commit d718f4fd30423fea957b14e141289739506656cb)
---

diff --git a/source3/locking/locking.c b/source3/locking/locking.c
index 04f4a4b1975..dde9477e230 100644
--- a/source3/locking/locking.c
+++ b/source3/locking/locking.c
@@ -32,137 +32,6 @@ extern files_struct Files[];
 pstring share_del_pending="";
 
 
-/****************************************************************************
-routine to do file locking
-****************************************************************************/
-BOOL fcntl_lock(int fd,int op,uint32 offset,uint32 count,int type)
-{
-#if HAVE_FCNTL_LOCK
-  struct flock lock;
-  int ret;
-
-#if 1
-  uint32 mask = 0xC0000000;
-
-  /* make sure the count is reasonable, we might kill the lockd otherwise */
-  count &= ~mask;
-
-  /* the offset is often strange - remove 2 of its bits if either of
-     the top two bits are set. Shift the top ones by two bits. This
-     still allows OLE2 apps to operate, but should stop lockd from
-     dieing */
-  if ((offset & mask) != 0)
-    offset = (offset & ~mask) | ((offset & mask) >> 2);
-#else
-  uint32 mask = ((unsigned)1<<31);
-
-  /* interpret negative counts as large numbers */
-  if (count < 0)
-    count &= ~mask;
-
-  /* no negative offsets */
-  offset &= ~mask;
-
-  /* count + offset must be in range */
-  while ((offset < 0 || (offset + count < 0)) && mask)
-    {
-      offset &= ~mask;
-      mask = mask >> 1;
-    }
-#endif
-
-
-  DEBUG(5,("fcntl_lock %d %d %d %d %d\n",fd,op,(int)offset,(int)count,type));
-
-  lock.l_type = type;
-  lock.l_whence = SEEK_SET;
-  lock.l_start = (int)offset;
-  lock.l_len = (int)count;
-  lock.l_pid = 0;
-
-  errno = 0;
-
-  ret = fcntl(fd,op,&lock);
-
-  if (errno != 0)
-    DEBUG(3,("fcntl lock gave errno %d (%s)\n",errno,strerror(errno)));
-
-  /* a lock query */
-  if (op == F_GETLK)
-    {
-      if ((ret != -1) &&
-	  (lock.l_type != F_UNLCK) && 
-	  (lock.l_pid != 0) && 
-	  (lock.l_pid != getpid()))
-	{
-	  DEBUG(3,("fd %d is locked by pid %d\n",fd,lock.l_pid));
-	  return(True);
-	}
-
-      /* it must be not locked or locked by me */
-      return(False);
-    }
-
-  /* a lock set or unset */
-  if (ret == -1)
-    {
-      DEBUG(3,("lock failed at offset %d count %d op %d type %d (%s)\n",
-	       offset,count,op,type,strerror(errno)));
-
-      /* perhaps it doesn't support this sort of locking?? */
-      if (errno == EINVAL)
-	{
-	  DEBUG(3,("locking not supported? returning True\n"));
-	  return(True);
-	}
-
-      return(False);
-    }
-
-  /* everything went OK */
-  DEBUG(5,("Lock call successful\n"));
-
-  return(True);
-#else
-  return(False);
-#endif
-}
-
-/*******************************************************************
-lock a file - returning a open file descriptor or -1 on failure
-The timeout is in seconds. 0 means no timeout
-********************************************************************/
-int file_lock(char *name,int timeout)
-{  
-  int fd = open(name,O_RDWR|O_CREAT,0666);
-  time_t t=0;
-  if (fd < 0) return(-1);
-
-#if HAVE_FCNTL_LOCK
-  if (timeout) t = time(NULL);
-  while (!timeout || (time(NULL)-t < timeout)) {
-    if (fcntl_lock(fd,F_SETLK,0,1,F_WRLCK)) return(fd);    
-    msleep(LOCK_RETRY_TIMEOUT);
-  }
-  return(-1);
-#else
-  return(fd);
-#endif
-}
-
-/*******************************************************************
-unlock a file locked by file_lock
-********************************************************************/
-void file_unlock(int fd)
-{
-  if (fd<0) return;
-#if HAVE_FCNTL_LOCK
-  fcntl_lock(fd,F_SETLK,0,1,F_UNLCK);
-#endif
-  close(fd);
-}
-
-
 /****************************************************************************
   utility function called to see if a file region is locked
 ****************************************************************************/