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28 .\" @(#)strmode.3 8.3 (Berkeley) 7/28/94
29 .\" $FreeBSD: src/lib/libc/string/strmode.3,v 1.10 2007/01/09 00:28:12 imp Exp $
30 .\" $DragonFly: src/lib/libc/string/strmode.3,v 1.2 2003/06/17 04:26:46 dillon Exp $
37 .Nd convert inode status information into a symbolic string
43 .Fn strmode "mode_t mode" "char *bp"
50 (the type and permission information associated with an inode, see
52 into a symbolic string which is stored in the location referenced by
54 This stored string is eleven characters in length plus a trailing
57 The first character is the inode type, and will be one of the following:
59 .Bl -tag -width flag -offset indent -compact
80 The next nine characters encode three sets of permissions, in three
82 The first three characters are the permissions for the owner of the
83 file, the second three for the group the file belongs to, and the
84 third for the ``other'', or default, set of users.
86 Permission checking is done as specifically as possible.
87 If read permission is denied to the owner of a file in the first set
88 of permissions, the owner of the file will not be able to read the file.
89 This is true even if the owner is in the file's group and the group
90 permissions allow reading or the ``other'' permissions allow reading.
92 If the first character of the three character set is an ``r'', the file is
93 readable for that set of users; if a dash ``\-'', it is not readable.
95 If the second character of the three character set is a ``w'', the file is
96 writable for that set of users; if a dash ``\-'', it is not writable.
98 The third character is the first of the following characters that apply:
101 If the character is part of the owner permissions and the file is not
102 executable or the directory is not searchable by the owner, and the
103 set-user-id bit is set.
105 If the character is part of the group permissions and the file is not
106 executable or the directory is not searchable by the group, and the
107 set-group-id bit is set.
109 If the character is part of the other permissions and the file is not
110 executable or the directory is not searchable by others, and the ``sticky''
114 If the character is part of the owner permissions and the file is
115 executable or the directory searchable by the owner, and the set-user-id
118 If the character is part of the group permissions and the file is
119 executable or the directory searchable by the group, and the set-group-id
122 If the character is part of the other permissions and the file is
123 executable or the directory searchable by others, and the ``sticky''
127 The file is executable or the directory is searchable.
129 None of the above apply.
132 The last character is a plus sign ``+'' if any there are any alternate
133 or additional access control methods associated with the inode, otherwise
144 function first appeared in