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1 | .\" Copyright (c) 2005-2007 Apple Inc | |
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5 | .\" modification, are permitted provided that the following conditions | |
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29 | .Dd February 3, 2005 | |
30 | .Dt MBR_UID_TO_UUID 3 | |
31 | .Os "Mac OS X" | |
32 | .Sh NAME | |
33 | .Nm mbr_uid_to_uuid, | |
34 | .Nm mbr_gid_to_uuid, | |
35 | .Nm mbr_uuid_to_id, | |
36 | .Nm mbr_sid_to_uuid, | |
37 | .Nm mbr_uuid_to_sid | |
38 | .Nd user and group identifier translation functions | |
39 | .Sh SYNOPSIS | |
40 | .In membership.h | |
41 | .Ft int | |
42 | .Fn mbr_uid_to_uuid "uid_t id" "uuid_t uu" | |
43 | .Ft int | |
44 | .Fn mbr_gid_to_uuid "gid_t id" "uuid_t uu" | |
45 | .Ft int | |
46 | .Fn mbr_uuid_to_id "const uuid_t uu" "uid_t *id" "int *id_type" | |
47 | .Ft int | |
48 | .Fn mbr_sid_to_uuid "const nt_sid_t *sid" "uuid_t uu" | |
49 | .Ft int | |
50 | .Fn mbr_uuid_to_sid "const uuid_t uu" "nt_sid_t *sid" | |
51 | .Sh DESCRIPTION | |
52 | Users and groups can be referred to in multiple ways. | |
53 | In addition to the traditional uid and gid, | |
54 | every user or group can be referenced by a 128 bit uuid. | |
55 | Additionally, if the user or group is hosted on a PDC | |
56 | or Active Directory server, it will have a 128 bit or larger sid. | |
57 | .Pp | |
58 | These routines communicate with the | |
59 | .Xr DirectoryService 8 | |
60 | daemon. | |
61 | .Pp | |
62 | .Fn mbr_uid_to_uuid | |
63 | takes a uid and looks up the associated user account. | |
64 | It provides the the uuid for that user as an output parameter. | |
65 | Note that this routine will succeed and return a fabricated uuid if the input user uid does not exist. | |
66 | .Fn getpwuid | |
67 | should be used to test for the existence of a uid. | |
68 | .Pp | |
69 | .Fn mbr_gid_to_uuid | |
70 | similarly gets the uuid associated with a group. | |
71 | Note that this routine will succeed and return a fabricated uuid if the input group gid does not exist. | |
72 | .Fn getgrgid | |
73 | should be used to test for the existence of a gid. | |
74 | .Pp | |
75 | .Fn mbr_uuid_to_id | |
76 | takes a uuid that refers to a user or group and fetches the corresponding uid or gid. | |
77 | .Fa id_type | |
78 | is set to ID_TYPE_UID or ID_TYPE_GID to indicate which type was found. | |
79 | Note that | |
80 | .Fn mbr_uuid_to_id | |
81 | always returns an id even if the uuid is not found. | |
82 | This returned id is not persistant, | |
83 | but can be used to map back to the uuid during runtime. | |
84 | To determine if the uuid exists, the returned id can be used in a call to | |
85 | .Xr getpwuid 3 | |
86 | or | |
87 | .Xr getgrgid 3 . | |
88 | .Pp | |
89 | .Fn mbr_sid_to_uuid | |
90 | takes a sid and returns the associated uuid. | |
91 | Like | |
92 | .Fn mbr_uuid_to_id , | |
93 | .Fn mbr_sid_to_uuid | |
94 | always returns a uuid for the sid, even if the sid can not be found. | |
95 | .Pp | |
96 | .Fn mbr_uuid_to_sid | |
97 | returns a sid for the associated uuid. | |
98 | .Sh RETURN VALUES | |
99 | These functions return 0 on success, or EIO if communications with the | |
100 | .Xr DirectoryService 8 | |
101 | daemon fails. | |
102 | ENOENT is returned if the mapping can not be performed. | |
103 | .Pp | |
104 | .Fn mbr_gid_to_uuid | |
105 | and | |
106 | .Fn mbr_uid_to_uuid | |
107 | return 0 (success), even if the user/group does not exist. | |
108 | .Sh SEE ALSO | |
109 | .Xr getpwuid 3 , | |
110 | .Xr getgrgid 3 , | |
111 | .Xr mbr_check_membership 3 , | |
112 | .Xr DirectoryService 8 |