fcntl.h 2.8 KB

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  1. //
  2. // Copyright 2026 Aarav Ravindra Kharade
  3. //
  4. // Licensed under the Apache License, Version 2.0 (the "License");
  5. // you may not use this file except in compliance with the License.
  6. // You may obtain a copy of the License at
  7. //
  8. // http://www.apache.org/licenses/LICENSE-2.0
  9. //
  10. // Unless required by applicable law or agreed to in writing, software
  11. // distributed under the License is distributed on an "AS IS" BASIS,
  12. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13. // See the License for the specific language governing permissions and
  14. // limitations under the License.
  15. //
  16. /* O_*, F_*, FD_* bit values for Linux/x86.
  17. Copyright (C) 2001-2026 Free Software Foundation, Inc.
  18. This file is part of the GNU C Library.
  19. The GNU C Library is free software; you can redistribute it and/or
  20. modify it under the terms of the GNU Lesser General Public
  21. License as published by the Free Software Foundation; either
  22. version 2.1 of the License, or (at your option) any later version.
  23. The GNU C Library is distributed in the hope that it will be useful,
  24. but WITHOUT ANY WARRANTY; without even the implied warranty of
  25. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  26. Lesser General Public License for more details.
  27. You should have received a copy of the GNU Lesser General Public
  28. License along with the GNU C Library; if not, see
  29. <https://www.gnu.org/licenses/>. */
  30. #ifndef _FCNTL_H
  31. # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
  32. #endif
  33. #ifdef __x86_64__
  34. # define __O_LARGEFILE 0
  35. #endif
  36. #ifdef __x86_64__
  37. /* Not necessary, we always have 64-bit offsets. */
  38. # define F_GETLK64 5 /* Get record locking info. */
  39. # define F_SETLK64 6 /* Set record locking info (non-blocking). */
  40. # define F_SETLKW64 7 /* Set record locking info (blocking). */
  41. #endif
  42. struct flock
  43. {
  44. short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
  45. short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
  46. #ifndef __USE_FILE_OFFSET64
  47. __off_t l_start; /* Offset where the lock begins. */
  48. __off_t l_len; /* Size of the locked area; zero means until EOF. */
  49. #else
  50. __off64_t l_start; /* Offset where the lock begins. */
  51. __off64_t l_len; /* Size of the locked area; zero means until EOF. */
  52. #endif
  53. __pid_t l_pid; /* Process holding the lock. */
  54. };
  55. #ifdef __USE_LARGEFILE64
  56. struct flock64
  57. {
  58. short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
  59. short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
  60. __off64_t l_start; /* Offset where the lock begins. */
  61. __off64_t l_len; /* Size of the locked area; zero means until EOF. */
  62. __pid_t l_pid; /* Process holding the lock. */
  63. };
  64. #endif
  65. /* Include generic Linux declarations. */
  66. #include <bits/fcntl-linux.h>