libphobos/libdruntime/core/sys/linux/fcntl.d

   1 module core.sys.linux.fcntl;
   2
   3 public import core.sys.posix.fcntl;
   4
   5 version (linux):
   6 extern(C):
   7 nothrow:
   8 @system:
   9
  10 // From linux/falloc.h
  11 /// fallocate(2) params
  12 enum {
  13     /// Allocates and initializes to zero the disk space
  14     /// within the specified range, but the file size
  15     /// will not be modified.
  16     FALLOC_FL_KEEP_SIZE = 0x01,
  17     /// Deallocates space (i.e. creates a hole)
  18     FALLOC_FL_PUNCH_HOLE = 0x02,
  19     /// Newly allocated blocks will be marked as initialized.
  20     FALLOC_FL_NO_HIDE_STALE = 0x04,
  21     /// Removes a byte range from a file, without leaving a hole
  22     FALLOC_FL_COLLAPSE_RANGE = 0x08,
  23     /// Zeroes space in the specified byte range
  24     FALLOC_FL_ZERO_RANGE = 0x10,
  25     /// Increases the file space by inserting a hole
  26     /// without overwriting any existing data
  27     FALLOC_FL_INSERT_RANGE = 0x20,
  28     /// Used to unshare shared blocks within
  29     /// the file size without overwriting any existing data
  30     FALLOC_FL_UNSHARE_RANGE = 0x40
  31 }
  32
  33 // From asm-generic/fcntl.h
  34 /**
  35
  36 Open File Description locks
  37
  38 Usually record locks held by a process are released on *any* close and are
  39 not inherited across a fork().
  40
  41 These cmd values will set locks that conflict with process-associated
  42 record  locks, but are "owned" by the open file description, not the
  43 process. This means that they are inherited across fork() like BSD (flock)
  44 locks, and they are only released automatically when the last reference to
  45 the open file against which they were acquired is put.
  46
  47 */
  48 enum
  49 {
  50     /// Queries the system if the lock could be placed
  51     F_OFD_GETLK  = 36,
  52     /// Acquires or releases an open file description lock
  53     F_OFD_SETLK  = 37,
  54     /// Same as F_OFD_SETLK, but waits if a conflicting lock is held on the file
  55     F_OFD_SETLKW = 38
  56 }
  57
  58 // Linux-specific fallocate
  59 // (http://man7.org/linux/man-pages/man2/fallocate.2.html)
  60 int fallocate(int fd, int mode, off_t offset, off_t len);