sysdeps/unix/sysv/linux/generic/bits/stat.h

   1 /* Copyright (C) 2011 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #if !defined _SYS_STAT_H && !defined _FCNTL_H
  21 # error "Never include <bits/stat.h> directly; use <sys/stat.h> instead."
  22 #endif
  23
  24 #ifndef _BITS_STAT_H
  25 #define _BITS_STAT_H    1
  26
  27 #include <endian.h>
  28 #include <bits/wordsize.h>
  29
  30 /* 64-bit libc uses the kernel's 'struct stat', accessed via the
  31    stat() syscall; 32-bit libc uses the kernel's 'struct stat64'
  32    and accesses it via the stat64() syscall.  All the various
  33    APIs offered by libc use the kernel shape for their struct stat
  34    structure; the only difference is that 32-bit programs not
  35    using __USE_FILE_OFFSET64 only see the low 32 bits of some
  36    of the fields (specifically st_ino, st_size, and st_blocks).  */
  37 #define _STAT_VER_KERNEL        0
  38 #define _STAT_VER_LINUX         0
  39 #define _STAT_VER               _STAT_VER_KERNEL
  40
  41 /* Versions of the `xmknod' interface.  */
  42 #define _MKNOD_VER_LINUX        0
  43
  44 #if defined __USE_FILE_OFFSET64
  45 # define __field64(type, type64, name) type64 name
  46 #elif __WORDSIZE == 64
  47 # define __field64(type, type64, name) type name
  48 #elif __BYTE_ORDER == __LITTLE_ENDIAN
  49 # define __field64(type, type64, name) \
  50   type name __attribute__((aligned(8))); int __##name##_pad
  51 #else
  52 # define __field64(type, type64, name) \
  53   int __##name##_pad __attribute__((aligned(8))); type name
  54 #endif
  55
  56 struct stat
  57   {
  58     __dev_t st_dev;             /* Device.  */
  59     __field64(__ino_t, __ino64_t, st_ino);  /* File serial number. */
  60     __mode_t st_mode;           /* File mode.  */
  61     __nlink_t st_nlink;         /* Link count.  */
  62     __uid_t st_uid;             /* User ID of the file's owner. */
  63     __gid_t st_gid;             /* Group ID of the file's group.*/
  64     __dev_t st_rdev;            /* Device number, if device.  */
  65     __dev_t __pad1;
  66     __field64(__off_t, __off64_t, st_size);  /* Size of file, in bytes. */
  67     __blksize_t st_blksize;     /* Optimal block size for I/O.  */
  68     int __pad2;
  69     __field64(__blkcnt_t, __blkcnt64_t, st_blocks);  /* 512-byte blocks */
  70 #ifdef __USE_MISC
  71     /* Nanosecond resolution timestamps are stored in a format
  72        equivalent to 'struct timespec'.  This is the type used
  73        whenever possible but the Unix namespace rules do not allow the
  74        identifier 'timespec' to appear in the <sys/stat.h> header.
  75        Therefore we have to handle the use of this header in strictly
  76        standard-compliant sources special.  */
  77     struct timespec st_atim;            /* Time of last access.  */
  78     struct timespec st_mtim;            /* Time of last modification.  */
  79     struct timespec st_ctim;            /* Time of last status change.  */
  80 # define st_atime st_atim.tv_sec        /* Backward compatibility.  */
  81 # define st_mtime st_mtim.tv_sec
  82 # define st_ctime st_ctim.tv_sec
  83 #else
  84     __time_t st_atime;                  /* Time of last access.  */
  85     unsigned long int st_atimensec;     /* Nscecs of last access.  */
  86     __time_t st_mtime;                  /* Time of last modification.  */
  87     unsigned long int st_mtimensec;     /* Nsecs of last modification.  */
  88     __time_t st_ctime;                  /* Time of last status change.  */
  89     unsigned long int st_ctimensec;     /* Nsecs of last status change.  */
  90 #endif
  91     int __unused[2];
  92   };
  93
  94 #undef __field64
  95
  96 #ifdef __USE_LARGEFILE64
  97 struct stat64
  98   {
  99     __dev_t st_dev;             /* Device.  */
 100     __ino64_t st_ino;           /* File serial number.  */
 101     __mode_t st_mode;           /* File mode.  */
 102     __nlink_t st_nlink;         /* Link count.  */
 103     __uid_t st_uid;             /* User ID of the file's owner. */
 104     __gid_t st_gid;             /* Group ID of the file's group.*/
 105     __dev_t st_rdev;            /* Device number, if device.  */
 106     __dev_t __pad1;
 107     __off64_t st_size;          /* Size of file, in bytes.  */
 108     __blksize_t st_blksize;     /* Optimal block size for I/O.  */
 109     int __pad2;
 110     __blkcnt64_t st_blocks;     /* Nr. 512-byte blocks allocated.  */
 111 #ifdef __USE_MISC
 112     /* Nanosecond resolution timestamps are stored in a format
 113        equivalent to 'struct timespec'.  This is the type used
 114        whenever possible but the Unix namespace rules do not allow the
 115        identifier 'timespec' to appear in the <sys/stat.h> header.
 116        Therefore we have to handle the use of this header in strictly
 117        standard-compliant sources special.  */
 118     struct timespec st_atim;            /* Time of last access.  */
 119     struct timespec st_mtim;            /* Time of last modification.  */
 120     struct timespec st_ctim;            /* Time of last status change.  */
 121 #else
 122     __time_t st_atime;                  /* Time of last access.  */
 123     unsigned long int st_atimensec;     /* Nscecs of last access.  */
 124     __time_t st_mtime;                  /* Time of last modification.  */
 125     unsigned long int st_mtimensec;     /* Nsecs of last modification.  */
 126     __time_t st_ctime;                  /* Time of last status change.  */
 127     unsigned long int st_ctimensec;     /* Nsecs of last status change.  */
 128 #endif
 129     int __unused[2];
 130   };
 131 #endif
 132
 133 /* Tell code we have these members.  */
 134 #define _STATBUF_ST_BLKSIZE
 135 #define _STATBUF_ST_RDEV
 136 /* Nanosecond resolution time values are supported.  */
 137 #define _STATBUF_ST_NSEC
 138
 139 /* Encoding of the file mode.  */
 140
 141 #define __S_IFMT        0170000 /* These bits determine file type.  */
 142
 143 /* File types.  */
 144 #define __S_IFDIR       0040000 /* Directory.  */
 145 #define __S_IFCHR       0020000 /* Character device.  */
 146 #define __S_IFBLK       0060000 /* Block device.  */
 147 #define __S_IFREG       0100000 /* Regular file.  */
 148 #define __S_IFIFO       0010000 /* FIFO.  */
 149 #define __S_IFLNK       0120000 /* Symbolic link.  */
 150 #define __S_IFSOCK      0140000 /* Socket.  */
 151
 152 /* POSIX.1b objects.  Note that these macros always evaluate to zero.  But
 153    they do it by enforcing the correct use of the macros.  */
 154 #define __S_TYPEISMQ(buf)  ((buf)->st_mode - (buf)->st_mode)
 155 #define __S_TYPEISSEM(buf) ((buf)->st_mode - (buf)->st_mode)
 156 #define __S_TYPEISSHM(buf) ((buf)->st_mode - (buf)->st_mode)
 157
 158 /* Protection bits.  */
 159
 160 #define __S_ISUID       04000   /* Set user ID on execution.  */
 161 #define __S_ISGID       02000   /* Set group ID on execution.  */
 162 #define __S_ISVTX       01000   /* Save swapped text after use (sticky).  */
 163 #define __S_IREAD       0400    /* Read by owner.  */
 164 #define __S_IWRITE      0200    /* Write by owner.  */
 165 #define __S_IEXEC       0100    /* Execute by owner.  */
 166
 167 #ifdef __USE_ATFILE
 168 # define UTIME_NOW      ((1l << 30) - 1l)
 169 # define UTIME_OMIT     ((1l << 30) - 2l)
 170 #endif
 171
 172 #endif /* bits/stat.h */