compilers/linux86-0.16.17/libc/include/sys/file.h

   1 #ifndef _SYS_FILE_H
   2 #define _SYS_FILE_H
   3
   4 #include <features.h>
   5 #include <fcntl.h>
   6
   7 #ifndef L_SET
   8
   9 #define L_SET           0       /* absolute offset */
  10 #define L_INCR          1       /* relative to current offset */
  11 #define L_XTND          2       /* relative to end of file */
  12
  13 #endif
  14
  15 #ifndef LOCK_SH
  16
  17 /* Operations for the `flock' call.  */
  18 #define LOCK_SH       1    /* Shared lock.  */
  19 #define LOCK_EX       2    /* Exclusive lock.  */
  20 #define LOCK_UN       8    /* Unlock.  */
  21
  22 /* Can be OR'd in to one of the above.  */
  23 #define LOCK_NB       4    /* Don't block when locking.  */
  24
  25 #endif
  26
  27 __BEGIN_DECLS
  28
  29 /* Apply or remove an advisory lock, according to OPERATION,
  30    on the file FD refers to.  */
  31 extern int flock __P ((int __fd, int __operation));
  32
  33 __END_DECLS
  34
  35 #endif