diff options
| -rw-r--r-- | source/locking/locking.c | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/source/locking/locking.c b/source/locking/locking.c index 04f4a4b1975..dde9477e230 100644 --- a/source/locking/locking.c +++ b/source/locking/locking.c @@ -33,137 +33,6 @@ 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 ****************************************************************************/ BOOL is_locked(int fnum,int cnum,uint32 count,uint32 offset) |