string/FreeBSD/strmode.3

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  28 .\"     @(#)strmode.3   8.3 (Berkeley) 7/28/94
  29 .\" $FreeBSD: src/lib/libc/string/strmode.3,v 1.11 2009/04/14 11:39:56 trasz Exp $
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  31 .Dd July 28, 1994
  32 .Dt STRMODE 3
  33 .Os
  34 .Sh NAME
  35 .Nm strmode
  36 .Nd convert inode status information into a symbolic string
  37 .Sh LIBRARY
  38 .Lb libc
  39 .Sh SYNOPSIS
  40 .In string.h
  41 .Ft void
  42 .Fo strmode
  43 .Fa "int mode"
  44 .Fa "char *bp"
  45 .Fc
  46 .Sh DESCRIPTION
  47 The
  48 .Fn strmode
  49 function
  50 converts a file
  51 .Fa mode
  52 (the type and permission information associated with an inode, see
  53 .Xr stat 2 )
  54 into a symbolic string which is stored in the location referenced by
  55 .Fa bp .
  56 This stored string is eleven characters in length plus a trailing
  57 .Dv NUL .
  58 .Pp
  59 The first character is the inode type, and will be one of the following:
  60 .Pp
  61 .Bl -tag -width flag -offset indent -compact
  62 .It \-
  63 regular file
  64 .It b
  65 block special
  66 .It c
  67 character special
  68 .It d
  69 directory
  70 .It l
  71 symbolic link
  72 .It p
  73 fifo
  74 .It s
  75 socket
  76 .It w
  77 whiteout
  78 .It ?
  79 unknown inode type
  80 .El
  81 .Pp
  82 The next nine characters encode three sets of permissions, in three
  83 characters each.
  84 The first three characters are the permissions for the owner of the
  85 file, the second three for the group the file belongs to, and the
  86 third for the ``other'', or default, set of users.
  87 .Pp
  88 Permission checking is done as specifically as possible.
  89 If read permission is denied to the owner of a file in the first set
  90 of permissions, the owner of the file will not be able to read the file.
  91 This is true even if the owner is in the file's group and the group
  92 permissions allow reading or the ``other'' permissions allow reading.
  93 .Pp
  94 If the first character of the three character set is an ``r'', the file is
  95 readable for that set of users; if a dash ``\-'', it is not readable.
  96 .Pp
  97 If the second character of the three character set is a ``w'', the file is
  98 writable for that set of users; if a dash ``\-'', it is not writable.
  99 .Pp
 100 The third character is the first of the following characters that apply:
 101 .Bl -tag -width xxxx
 102 .It S
 103 If the character is part of the owner permissions and the file is not
 104 executable or the directory is not searchable by the owner, and the
 105 set-user-id bit is set.
 106 .It S
 107 If the character is part of the group permissions and the file is not
 108 executable or the directory is not searchable by the group, and the
 109 set-group-id bit is set.
 110 .It T
 111 If the character is part of the other permissions and the file is not
 112 executable or the directory is not searchable by others, and the ``sticky''
 113 .Pq Dv S_ISVTX
 114 bit is set.
 115 .It s
 116 If the character is part of the owner permissions and the file is
 117 executable or the directory searchable by the owner, and the set-user-id
 118 bit is set.
 119 .It s
 120 If the character is part of the group permissions and the file is
 121 executable or the directory searchable by the group, and the set-group-id
 122 bit is set.
 123 .It t
 124 If the character is part of the other permissions and the file is
 125 executable or the directory searchable by others, and the ``sticky''
 126 .Pq Dv S_ISVTX
 127 bit is set.
 128 .It x
 129 The file is executable or the directory is searchable.
 130 .It \-
 131 None of the above apply.
 132 .El
 133 .Pp
 134 The last character will always be a space.
 135 .Sh SEE ALSO
 136 .Xr chmod 1 ,
 137 .Xr find 1 ,
 138 .Xr stat 2 ,
 139 .Xr getmode 3 ,
 140 .Xr setmode 3
 141 .Sh HISTORY
 142 The
 143 .Fn strmode
 144 function first appeared in
 145 .Bx 4.4 .