stat.h 5.3 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, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #ifndef _SYS_STAT_H
  17. # error "Never include <bits/stat.h> directly; use <sys/stat.h> instead."
  18. #endif
  19. /* Versions of the `struct stat' data structure. */
  20. #define _STAT_VER_KERNEL 0
  21. #define _STAT_VER_GLIBC2 1
  22. #define _STAT_VER_GLIBC2_1 2
  23. #define _STAT_VER_KERNEL64 3
  24. #define _STAT_VER_GLIBC2_3_4 3
  25. #define _STAT_VER _STAT_VER_GLIBC2_3_4
  26. /* Versions of the `xmknod' interface. */
  27. #define _MKNOD_VER_LINUX 0
  28. /* Nanosecond resolution timestamps are stored in a format equivalent to
  29. 'struct timespec'. This is the type used whenever possible but the
  30. Unix namespace rules do not allow the identifier 'timespec' to appear
  31. in the <sys/stat.h> header. Therefore we have to handle the use of
  32. this header in strictly standard-compliant sources special.
  33. Use neat tidy anonymous unions and structures when possible. */
  34. #ifdef __USE_MISC
  35. # if __GNUC_PREREQ(3,3)
  36. # define __ST_TIME(X) \
  37. __extension__ union { \
  38. struct timespec st_##X##tim; \
  39. struct { \
  40. __time_t st_##X##time; \
  41. unsigned long st_##X##timensec; \
  42. }; \
  43. }
  44. # else
  45. # define __ST_TIME(X) struct timespec st_##X##tim
  46. # define st_atime st_atim.tv_sec
  47. # define st_mtime st_mtim.tv_sec
  48. # define st_ctime st_ctim.tv_sec
  49. # endif
  50. #else
  51. # define __ST_TIME(X) \
  52. __time_t st_##X##time; \
  53. unsigned long st_##X##timensec
  54. #endif
  55. struct stat
  56. {
  57. __dev_t st_dev; /* Device. */
  58. #ifdef __USE_FILE_OFFSET64
  59. __ino64_t st_ino; /* File serial number. */
  60. #else
  61. __ino_t st_ino; /* File serial number. */
  62. int __pad0; /* 64-bit st_ino. */
  63. #endif
  64. __dev_t st_rdev; /* Device number, if device. */
  65. __off_t st_size; /* Size of file, in bytes. */
  66. #ifdef __USE_FILE_OFFSET64
  67. __blkcnt64_t st_blocks; /* Nr. 512-byte blocks allocated. */
  68. #else
  69. __blkcnt_t st_blocks; /* Nr. 512-byte blocks allocated. */
  70. int __pad1; /* 64-bit st_blocks. */
  71. #endif
  72. __mode_t st_mode; /* File mode. */
  73. __uid_t st_uid; /* User ID of the file's owner. */
  74. __gid_t st_gid; /* Group ID of the file's group.*/
  75. __blksize_t st_blksize; /* Optimal block size for I/O. */
  76. __nlink_t st_nlink; /* Link count. */
  77. int __pad2; /* Real padding. */
  78. __ST_TIME(a); /* Time of last access. */
  79. __ST_TIME(m); /* Time of last modification. */
  80. __ST_TIME(c); /* Time of last status change. */
  81. long __unused[3];
  82. };
  83. #ifdef __USE_LARGEFILE64
  84. /* Note stat64 is the same shape as stat. */
  85. struct stat64
  86. {
  87. __dev_t st_dev; /* Device. */
  88. __ino64_t st_ino; /* File serial number. */
  89. __dev_t st_rdev; /* Device number, if device. */
  90. __off_t st_size; /* Size of file, in bytes. */
  91. __blkcnt64_t st_blocks; /* Nr. 512-byte blocks allocated. */
  92. __mode_t st_mode; /* File mode. */
  93. __uid_t st_uid; /* User ID of the file's owner. */
  94. __gid_t st_gid; /* Group ID of the file's group.*/
  95. __blksize_t st_blksize; /* Optimal block size for I/O. */
  96. __nlink_t st_nlink; /* Link count. */
  97. int __pad0; /* Real padding. */
  98. __ST_TIME(a); /* Time of last access. */
  99. __ST_TIME(m); /* Time of last modification. */
  100. __ST_TIME(c); /* Time of last status change. */
  101. long __unused[3];
  102. };
  103. #endif
  104. #undef __ST_TIME
  105. /* Tell code we have these members. */
  106. #define _STATBUF_ST_BLKSIZE
  107. #define _STATBUF_ST_RDEV
  108. #define _STATBUF_ST_NSEC
  109. /* Encoding of the file mode. */
  110. #define __S_IFMT 0170000 /* These bits determine file type. */
  111. /* File types. */
  112. #define __S_IFDIR 0040000 /* Directory. */
  113. #define __S_IFCHR 0020000 /* Character device. */
  114. #define __S_IFBLK 0060000 /* Block device. */
  115. #define __S_IFREG 0100000 /* Regular file. */
  116. #define __S_IFIFO 0010000 /* FIFO. */
  117. #define __S_IFLNK 0120000 /* Symbolic link. */
  118. #define __S_IFSOCK 0140000 /* Socket. */
  119. /* POSIX.1b objects. Note that these macros always evaluate to zero. But
  120. they do it by enforcing the correct use of the macros. */
  121. #define __S_TYPEISMQ(buf) ((buf)->st_mode - (buf)->st_mode)
  122. #define __S_TYPEISSEM(buf) ((buf)->st_mode - (buf)->st_mode)
  123. #define __S_TYPEISSHM(buf) ((buf)->st_mode - (buf)->st_mode)
  124. /* Protection bits. */
  125. #define __S_ISUID 04000 /* Set user ID on execution. */
  126. #define __S_ISGID 02000 /* Set group ID on execution. */
  127. #define __S_ISVTX 01000 /* Save swapped text after use (sticky). */
  128. #define __S_IREAD 0400 /* Read by owner. */
  129. #define __S_IWRITE 0200 /* Write by owner. */
  130. #define __S_IEXEC 0100 /* Execute by owner. */
  131. #ifdef __USE_ATFILE
  132. # define UTIME_NOW ((1l << 30) - 1l)
  133. # define UTIME_OMIT ((1l << 30) - 2l)
  134. #endif