src/basic/missing_fcntl.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 #include <fcntl.h>
   5
   6 #ifndef F_LINUX_SPECIFIC_BASE
   7 #define F_LINUX_SPECIFIC_BASE 1024
   8 #endif
   9
  10 #ifndef F_SETPIPE_SZ
  11 #define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
  12 #endif
  13
  14 #ifndef F_GETPIPE_SZ
  15 #define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)
  16 #endif
  17
  18 #ifndef F_ADD_SEALS
  19 #define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
  20 #define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
  21
  22 #define F_SEAL_SEAL     0x0001  /* prevent further seals from being set */
  23 #define F_SEAL_SHRINK   0x0002  /* prevent file from shrinking */
  24 #define F_SEAL_GROW     0x0004  /* prevent file from growing */
  25 #define F_SEAL_WRITE    0x0008  /* prevent writes */
  26 #endif
  27
  28 #ifndef F_SEAL_FUTURE_WRITE
  29 #define F_SEAL_FUTURE_WRITE 0x0010 /* prevent future writes while mapped */
  30 #endif
  31
  32 #ifndef F_SEAL_EXEC
  33 #define F_SEAL_EXEC     0x0020  /* prevent chmod modifying exec bits */
  34 #endif
  35
  36 #ifndef F_OFD_GETLK
  37 #define F_OFD_GETLK     36
  38 #define F_OFD_SETLK     37
  39 #define F_OFD_SETLKW    38
  40 #endif
  41
  42 #ifndef MAX_HANDLE_SZ
  43 #define MAX_HANDLE_SZ 128
  44 #endif
  45
  46 /* The precise definition of __O_TMPFILE is arch specific; use the
  47  * values defined by the kernel (note: some are hexa, some are octal,
  48  * duplicated as-is from the kernel definitions):
  49  * - alpha, parisc, sparc: each has a specific value;
  50  * - others: they use the "generic" value.
  51  */
  52
  53 #ifndef __O_TMPFILE
  54 #if defined(__alpha__)
  55 #define __O_TMPFILE     0100000000
  56 #elif defined(__parisc__) || defined(__hppa__)
  57 #define __O_TMPFILE     0400000000
  58 #elif defined(__sparc__) || defined(__sparc64__)
  59 #define __O_TMPFILE     0x2000000
  60 #else
  61 #define __O_TMPFILE     020000000
  62 #endif
  63 #endif
  64
  65 /* a horrid kludge trying to make sure that this will fail on old kernels */
  66 #ifndef O_TMPFILE
  67 #define O_TMPFILE (__O_TMPFILE | O_DIRECTORY)
  68 #endif
  69
  70 /* So O_LARGEFILE is generally implied by glibc, and defined to zero hence, because we only build in LFS
  71  * mode. However, when invoking fcntl(F_GETFL) the flag is ORed into the result anyway — glibc does not mask
  72  * it away. Which sucks. Let's define the actual value here, so that we can mask it ourselves.
  73  *
  74  * The precise definition is arch specific, so we use the values defined in the kernel (note that some
  75  * are hexa and others are octal; duplicated as-is from the kernel definitions):
  76  * - alpha, arm, arm64, m68k, mips, parisc, powerpc, sparc: each has a specific value;
  77  * - others: they use the "generic" value (defined in include/uapi/asm-generic/fcntl.h) */
  78 #if O_LARGEFILE != 0
  79 #define RAW_O_LARGEFILE O_LARGEFILE
  80 #else
  81 #if defined(__alpha__) || defined(__arm__) || defined(__aarch64__) || defined(__m68k__)
  82 #define RAW_O_LARGEFILE 0400000
  83 #elif defined(__mips__)
  84 #define RAW_O_LARGEFILE 0x2000
  85 #elif defined(__parisc__) || defined(__hppa__)
  86 #define RAW_O_LARGEFILE 000004000
  87 #elif defined(__powerpc__)
  88 #define RAW_O_LARGEFILE 0200000
  89 #elif defined(__sparc__)
  90 #define RAW_O_LARGEFILE 0x40000
  91 #else
  92 #define RAW_O_LARGEFILE 00100000
  93 #endif
  94 #endif