stat.h 5.2 KB

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  1. /* Copyright (C) 1996,1997,1998,1999,2000,2001,2004
  2. Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, see
  14. <http://www.gnu.org/licenses/>. */
  15. #ifndef _SYS_STAT_H
  16. # error "Never include <bits/stat.h> directly; use <sys/stat.h> instead."
  17. #endif
  18. /* Versions of the `struct stat' data structure. */
  19. #define _STAT_VER_KERNEL 0
  20. #define _STAT_VER_GLIBC2 1
  21. #define _STAT_VER_GLIBC2_1 2
  22. #define _STAT_VER_KERNEL64 3
  23. #define _STAT_VER_GLIBC2_3_4 3
  24. #define _STAT_VER _STAT_VER_GLIBC2_3_4
  25. /* Versions of the `xmknod' interface. */
  26. #define _MKNOD_VER_LINUX 0
  27. /* Nanosecond resolution timestamps are stored in a format equivalent to
  28. 'struct timespec'. This is the type used whenever possible but the
  29. Unix namespace rules do not allow the identifier 'timespec' to appear
  30. in the <sys/stat.h> header. Therefore we have to handle the use of
  31. this header in strictly standard-compliant sources special.
  32. Use neat tidy anonymous unions and structures when possible. */
  33. #ifdef __USE_MISC
  34. # if __GNUC_PREREQ(3,3)
  35. # define __ST_TIME(X) \
  36. __extension__ union { \
  37. struct timespec st_##X##tim; \
  38. struct { \
  39. __time_t st_##X##time; \
  40. unsigned long st_##X##timensec; \
  41. }; \
  42. }
  43. # else
  44. # define __ST_TIME(X) struct timespec st_##X##tim
  45. # define st_atime st_atim.tv_sec
  46. # define st_mtime st_mtim.tv_sec
  47. # define st_ctime st_ctim.tv_sec
  48. # endif
  49. #else
  50. # define __ST_TIME(X) \
  51. __time_t st_##X##time; \
  52. unsigned long st_##X##timensec
  53. #endif
  54. struct stat
  55. {
  56. __dev_t st_dev; /* Device. */
  57. #ifdef __USE_FILE_OFFSET64
  58. __ino64_t st_ino; /* File serial number. */
  59. #else
  60. __ino_t st_ino; /* File serial number. */
  61. int __pad0; /* 64-bit st_ino. */
  62. #endif
  63. __dev_t st_rdev; /* Device number, if device. */
  64. __off_t st_size; /* Size of file, in bytes. */
  65. #ifdef __USE_FILE_OFFSET64
  66. __blkcnt64_t st_blocks; /* Nr. 512-byte blocks allocated. */
  67. #else
  68. __blkcnt_t st_blocks; /* Nr. 512-byte blocks allocated. */
  69. int __pad1; /* 64-bit st_blocks. */
  70. #endif
  71. __mode_t st_mode; /* File mode. */
  72. __uid_t st_uid; /* User ID of the file's owner. */
  73. __gid_t st_gid; /* Group ID of the file's group.*/
  74. __blksize_t st_blksize; /* Optimal block size for I/O. */
  75. __nlink_t st_nlink; /* Link count. */
  76. int __pad2; /* Real padding. */
  77. __ST_TIME(a); /* Time of last access. */
  78. __ST_TIME(m); /* Time of last modification. */
  79. __ST_TIME(c); /* Time of last status change. */
  80. long __unused[3];
  81. };
  82. #ifdef __USE_LARGEFILE64
  83. /* Note stat64 is the same shape as stat. */
  84. struct stat64
  85. {
  86. __dev_t st_dev; /* Device. */
  87. __ino64_t st_ino; /* File serial number. */
  88. __dev_t st_rdev; /* Device number, if device. */
  89. __off_t st_size; /* Size of file, in bytes. */
  90. __blkcnt64_t st_blocks; /* Nr. 512-byte blocks allocated. */
  91. __mode_t st_mode; /* File mode. */
  92. __uid_t st_uid; /* User ID of the file's owner. */
  93. __gid_t st_gid; /* Group ID of the file's group.*/
  94. __blksize_t st_blksize; /* Optimal block size for I/O. */
  95. __nlink_t st_nlink; /* Link count. */
  96. int __pad0; /* Real padding. */
  97. __ST_TIME(a); /* Time of last access. */
  98. __ST_TIME(m); /* Time of last modification. */
  99. __ST_TIME(c); /* Time of last status change. */
  100. long __unused[3];
  101. };
  102. #endif
  103. #undef __ST_TIME
  104. /* Tell code we have these members. */
  105. #define _STATBUF_ST_BLKSIZE
  106. #define _STATBUF_ST_RDEV
  107. #define _STATBUF_ST_NSEC
  108. /* Encoding of the file mode. */
  109. #define __S_IFMT 0170000 /* These bits determine file type. */
  110. /* File types. */
  111. #define __S_IFDIR 0040000 /* Directory. */
  112. #define __S_IFCHR 0020000 /* Character device. */
  113. #define __S_IFBLK 0060000 /* Block device. */
  114. #define __S_IFREG 0100000 /* Regular file. */
  115. #define __S_IFIFO 0010000 /* FIFO. */
  116. #define __S_IFLNK 0120000 /* Symbolic link. */
  117. #define __S_IFSOCK 0140000 /* Socket. */
  118. /* POSIX.1b objects. Note that these macros always evaluate to zero. But
  119. they do it by enforcing the correct use of the macros. */
  120. #define __S_TYPEISMQ(buf) ((buf)->st_mode - (buf)->st_mode)
  121. #define __S_TYPEISSEM(buf) ((buf)->st_mode - (buf)->st_mode)
  122. #define __S_TYPEISSHM(buf) ((buf)->st_mode - (buf)->st_mode)
  123. /* Protection bits. */
  124. #define __S_ISUID 04000 /* Set user ID on execution. */
  125. #define __S_ISGID 02000 /* Set group ID on execution. */
  126. #define __S_ISVTX 01000 /* Save swapped text after use (sticky). */
  127. #define __S_IREAD 0400 /* Read by owner. */
  128. #define __S_IWRITE 0200 /* Write by owner. */
  129. #define __S_IEXEC 0100 /* Execute by owner. */
  130. #ifdef __USE_ATFILE
  131. # define UTIME_NOW ((1l << 30) - 1l)
  132. # define UTIME_OMIT ((1l << 30) - 2l)
  133. #endif