getusernam(3secdb)

1getuserattr(3SECDSBe)curity Attributes Database Library Functiognestuserattr(3SECDB)
2
3
4

NAME

6       getuserattr,   getusernam,   getuseruid,   free_userattr,  setuserattr,
7       enduserattr, fgetuserattr - get user_attr entry
8

SYNOPSIS

10       cc [ flag... ] file... -lsecdb  -lsocket  -lnsl [ library... ]
11       #include <user_attr.h>
12
13       userattr_t *getuserattr(void);
14
15
16       userattr_t *getusernam(const char *name);
17
18
19       userattr_t *getuseruid(uid_t uid);
20
21
22       void free_userattr(userattr_t *userattr);
23
24
25       void setuserattr(void);
26
27
28       void enduserattr(void);
29
30
31       userattr_t *fgetuserattr(FILE *f);
32
33

DESCRIPTION

35       The getuserattr(), getusernam(), and getuseruid() functions each return
36       a  user_attr(4)  entry. Entries can come from any of the sources speci‐
37       fied in the nsswitch.conf(4) file. The getuserattr()  function  enumer‐
38       ates  user_attr  entries.  The  getusernam()  function  searches  for a
39       user_attr entry with a given user name name. The getuseruid()  function
40       searches  for  a  user_attr  entry with a given user ID uid. Successive
41       calls to these functions return either successive user_attr entries  or
42       NULL.
43
44
45       The  fgetuserattr()  function  does not use nsswitch.conf but reads and
46       parses the next line from the stream f. This stream is assumed to  have
47       the format of the user_attr files.
48
49
50       The  free_userattr() function releases memory allocated by the getuser‐
51       nam(), getuserattr(), and fgetuserattr() functions.
52
53
54       The internal representation of a user_attr entry is a userattr_t struc‐
55       ture defined in <user_attr.h> with the following members:
56
57         char  *name;       /* name of the user */
58         char  *qualifier;  /* reserved for future use */
59         char  *res1;       /* reserved for future use */
60         char  *res2;       /* reserved for future use */
61         kva_t *attr;       /* list of attributes */
62
63
64
65       The  setuserattr()  function "rewinds" to the beginning of the enumera‐
66       tion of user_attr entries.  Calls to getusernam() may leave the enumer‐
67       ation  in  an  indeterminate  state,  so setuserattr() should be called
68       before the first call to getuserattr().
69
70
71       The enduserattr() function may be called  to  indicate  that  user_attr
72       processing  is  complete; the library may then close any open user_attr
73       file, deallocate any internal storage, and so forth.
74

RETURN VALUES

76       The getuserattr() function returns a pointer to a userattr_t if it suc‐
77       cessfully  enumerates  an  entry; otherwise it returns NULL, indicating
78       the end of the enumeration.
79
80
81       The getusernam() function returns a pointer to a userattr_t if it  suc‐
82       cessfully locates the requested entry; otherwise it returns NULL.
83

USAGE

85       The  getuserattr()  and getusernam() functions both allocate memory for
86       the pointers they return. This memory should be  deallocated  with  the
87       free_userattr() function.
88
89
90       Individual  attributes can be referenced in the attr structure by call‐
91       ing the kva_match(3SECDB) function.
92

WARININGS

94       Because the list of legal keys is likely to expand, code  must be writ‐
95       ten to ignore unknown key-value pairs without error.
96

FILES

98       /etc/user_attr        extended user attributes
99
100
101       /etc/nsswitch.conf    configuration  file  lookup  information  for the
102                             name server switch
103
104

ATTRIBUTES

106       See attributes(5) for descriptions of the following attributes:
107
108
109
110
111       ┌─────────────────────────────┬─────────────────────────────┐
112       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
113       ├─────────────────────────────┼─────────────────────────────┤
114       │MT-Level                     │MT-Safe                      │
115       └─────────────────────────────┴─────────────────────────────┘
116