1 .\" Access Control Lists manual pages
3 .\" (C) 2002 Andreas Gruenbacher, <a.gruenbacher@bestbits.at>
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29 .Nd check an ACL for validity
31 Linux Access Control Lists library (libacl, \-lacl).
36 .Fn acl_check "acl_t acl" "int *last"
40 function checks the ACL referred to by the argument
44 The three required entries ACL_USER_OBJ, ACL_GROUP_OBJ, and ACL_OTHER
45 must exist exactly once in the ACL. If the ACL contains any ACL_USER or
46 ACL_GROUP entries, then an ACL_MASK entry is also required. The ACL
47 may contain at most one ACL_MASK entry.
49 The user identifiers must be unique among all entries of type ACL_USER.
50 The group identifiers must be unique among all entries of type ACL_GROUP.
52 If the ACL referred to by
56 returns a positive error code that indicates which type of error was detected.
57 The following symbolic error codes are defined:
58 .Bl -tag -width ACL_DUPLICATE_ERROR.
60 The ACL contains multiple entries that have a tag type
61 that may occur at most once.
62 .It ACL_DUPLICATE_ERROR
63 The ACL contains multiple ACL_USER entries with the same user ID, or
64 multiple ACL_GROUP entries with the same group ID.
66 A required entry is missing.
68 The ACL contains an invalid entry tag type.
73 function can be used to translate error codes to text messages.
75 In addition, if the pointer
80 assigns the number of the ACL entry at which the error was detected to
81 the value pointed to by
83 Entries are numbered starting with zero, in the order in which they would be
92 if the ACL referred to by
94 is valid, and a positive error code if the ACL is invalid. Otherwise, a
97 is returned and the global variable
99 is set to indicate the error.
101 If any of the following conditions occur, the
107 to the corresponding value:
112 is not a valid pointer to an ACL.
115 This is a non-portable, Linux specific extension to the ACL manipulation
116 functions defined in IEEE Std 1003.1e draft 17 (\(lqPOSIX.1e\(rq, abandoned).
122 .An "Andreas Gruenbacher" Aq a.gruenbacher@bestbits.at .