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6 .TH GETPROJENT 3PROJECT "Apr 5, 2004"
7 .SH NAME
8 getprojent, getprojbyname, getprojbyid, getdefaultproj, inproj,
9 getprojidbyname, setprojent, endprojent, fgetprojent \- project database entry
10 operations
11 .SH SYNOPSIS
12 .LP
13 .nf
14 cc [ \fIflag\fR... ] \fIfile\fR... \(milproject [ \fIlibrary\fR... ]
15 #include <project.h>
16
17 \fBstruct project *\fR\fBgetprojent\fR(\fBstruct project *\fR\fIproj\fR, \fBvoid *\fR\fIbuffer\fR,
18 \fBsize_t\fR \fIbufsize\fR);
19 .fi
20
21 .LP
22 .nf
23 \fBstruct project *\fR\fBgetprojbyname\fR(\fBconst char *\fR\fIname\fR,
24 \fBstruct project *\fR\fIproj\fR, \fBvoid *\fR\fIbuffer\fR, \fBsize_t\fR \fIbufsize\fR);
25 .fi
26
27 .LP
28 .nf
29 \fBstruct project *\fR\fBgetprojbyid\fR(\fBprojid_t\fR \fIprojid\fR,
30 \fBstruct project *\fR\fIproj\fR, \fBvoid *\fR\fIbuffer\fR, \fBsize_t\fR \fIbufsize\fR);
31 .fi
32
33 .LP
34 .nf
35 \fBstruct project *\fR\fBgetdefaultproj\fR(\fBconst char *\fR\fIusername\fR,
36 \fBstruct project *\fR\fIproj\fR, \fBvoid *\fR\fIbuffer\fR, \fBsize_t\fR \fIbufsize\fR);
37 .fi
38
39 .LP
40 .nf
41 \fBint\fR \fBinproj\fR(\fBconst char *\fR\fIusername\fR, \fBconst char *\fR\fIprojname\fR,
42 \fBvoid *\fR\fIbuffer\fR, \fBsize_t\fR \fIbufsize\fR);
43 .fi
44
45 .LP
46 .nf
47 \fBprojid_t\fR \fBgetprojidbyname\fR(\fBconst char *\fR\fIname\fR);
48 .fi
49
50 .LP
51 .nf
52 \fBvoid\fR \fBsetprojent\fR(\fBvoid\fR);
53 .fi
54
55 .LP
56 .nf
57 \fBvoid\fR \fBendprojent\fR(\fBvoid\fR);
58 .fi
59
60 .LP
61 .nf
62 \fBstruct project *\fR\fBfgetprojent\fR(\fBFILE *\fR\fIf\fR, \fBstruct project *\fR\fIproj\fR,
63 \fBvoid *\fR\fIbuffer\fR, \fBsize_t\fR \fIbufsize\fR);
64 .fi
65
66 .SH DESCRIPTION
67 .sp
68 .LP
69 These functions are used to obtain entries describing user projects. Entries
70 can come from any of the sources for a project specified in the
71 \fB/etc/nsswitch.conf\fR file (see \fBnsswitch.conf\fR(4)).
72 .sp
73 .LP
74 The \fBsetprojent()\fR, \fBgetprojent()\fR, and \fBendprojent()\fR functions
75 are used to enumerate project entries from the database.
76 .sp
77 .LP
78 The \fBsetprojent()\fR function effectively rewinds the project database to
79 allow repeated searches. It sets (or resets) the enumeration to the beginning
80 of the set of project entries. This function should be called before the first
81 call to \fBgetprojent()\fR.
82 .sp
83 .LP
84 The \fBgetprojent()\fR function returns a pointer to a structure containing the
85 broken-out fields of an entry in the project database. When first called,
86 \fBgetprojent()\fR returns a pointer to a project structure containing the
87 first project structure in the project database. Successive calls can be used
88 to read the entire database.
89 .sp
90 .LP
91 The \fBendprojent()\fR function closes the project database and deallocates
92 resources when processing is complete. It is permissible, though possibly less
93 efficient, for the process to call more project functions after calling
94 \fBendprojent()\fR.
95 .sp
96 .LP
97 The \fBgetprojbyname()\fR function searches the project database for an entry
98 with the project name specified by the character string \fIname\fR.
99 .sp
100 .LP
101 The \fBgetprojbyid()\fR function searches the project database for an entry
102 with the (numeric) project \fBID\fR specified by \fIprojid\fR.
103 .sp
104 .LP
105 The \fBgetdefaultproj()\fR function first looks up the project key word in the
106 \fBuser_attr\fR database used to define user attributes in restricted Solaris
107 environments. If the database is available and the keyword is present, the
108 function looks up the named project, returning \fINULL\fR if it cannot be found
109 or if the user is not a member of the named project. If absent, the function
110 looks for a match in the project database for the special project
111 \fBuser\fR.\fIusername\fR. If no match is found, or if the user is excluded
112 from project \fBuser\fR.\fIusername\fR, the function looks at the default group
113 entry of the \fBpasswd\fR database for the user, and looks for a match in the
114 project database for the special name \fBgroup\fR.\fIgroupname\fR, where
115 \fIgroupname\fR is the default group associated with the password entry
116 corresponding to the given \fIusername\fR. If no match is found, or if the user
117 is excluded from project \fBgroup\fR.\fIgroupname\fR, the function returns
118 \fINULL\fR. A special project entry called 'default' can be looked up and used
119 as a last resort, unless the user is excluded from project 'default'. On
120 successful lookup, this function returns a pointer to the valid \fBproject\fR
121 structure. By convention, the user must have a default project defined on a
122 system to be able to log on to that system.
123 .sp
124 .LP
125 The \fBinproj()\fR function checks if the user specified by \fIusername\fR is
126 able to use the project specified by \fIprojname\fR. This function returns 1 if
127 the user belongs to the list of project's users, if there is a project's group
128 that contains the specified user, if project is a user's default project, or if
129 project's user or group list contains "*" wildcard. In all other cases it
130 returns 0.
131 .sp
132 .LP
133 The \fBgetprojidbyname()\fR function searches the project database for an entry
134 with the project name specified by the character string name. This function
135 returns the project ID if the requested entry is found; otherwise it returns
136 \(mi1.
137 .sp
138 .LP
139 The \fBfgetprojent()\fR function, unlike the other functions described above,
140 does not use \fBnsswitch.conf\fR; it reads and parses the next line from the
141 stream \fIf\fR, which is assumed to have the format of the \fBproject\fR(4)
142 file. This function returns the same values as \fBgetprojent()\fR.
143 .sp
144 .LP
145 The \fBgetprojent()\fR, \fBgetprojbyname()\fR, \fBgetprojbyid()\fR,
146 \fBgetdefaultproj()\fR, and \fBinproj()\fR functions are reentrant interfaces
147 for operations with the \fBproject\fR database. These functions use buffers
148 supplied by the caller to store returned results and are safe for use in both
149 single-threaded and multithreaded applications.
150 .sp
151 .LP
152 Reentrant interfaces require the additional arguments \fIproj\fR, \fIbuffer\fR,
153 and \fIbufsize\fR. The \fIproj\fR argument must be a pointer to a \fBstruct
154 project\fR structure allocated by the caller. On successful completion, the
155 function returns the project entry in this structure. Storage referenced by the
156 \fBproject\fR structure is allocated from the memory provided with the
157 \fIbuffer\fR argument, which is \fIbufsize\fR bytes in size. The content of
158 the memory buffer could be lost in cases when these functions return errors.
159 .sp
160 .LP
161 For enumeration in multithreaded applications, the position within the
162 enumeration is a process-wide property shared by all threads. The
163 \fBsetprojent()\fR function can be used in a multithreaded application but
164 resets the enumeration position for all threads. If multiple threads interleave
165 calls to \fBgetprojent()\fR, the threads will enumerate disjoint subsets of the
166 project database. The \fBinproj()\fR, \fBgetprojbyname()\fR,
167 \fBgetprojbyid()\fR, and \fBgetdefaultproj()\fR functions leave the enumeration
168 position in an indeterminate state.
169 .SH RETURN VALUES
170 .sp
171 .LP
172 Project entries are represented by the \fBstruct project\fR structure defined
173 in <\fBproject.h\fR>.
174 .sp
175 .in +2
176 .nf
177 struct project {
178 char *pj_name; /* name of the project */
179 projid_t pj_projid; /* numerical project id */
180 char *pj_comment; /* project comment */
181 char **pj_users; /* vector of pointers to
182 project user names */
183 char **pj_groups; /* vector of pointers to
184 project group names */
185 char *pj_attr; /* project attributes */
186 };
187 .fi
188 .in -2
189
190 .sp
191 .LP
192 The \fBgetprojbyname()\fR and \fBgetprojbyid()\fR functions each return a
193 pointer to a \fBstruct project\fR if they successfully locate the requested
194 entry; otherwise they return \fINULL\fR.
195 .sp
196 .LP
197 The \fBgetprojent()\fR function returns a pointer to a \fBstruct project\fR if
198 it successfully enumerates an entry; otherwise it returns \fINULL\fR,
199 indicating the end of the enumeration.
200 .sp
201 .LP
202 The \fBgetprojidbyname()\fR function returns the project ID if the requsted
203 entry is found; otherwise it returns \(mi1 and sets errno to indicate the
204 error.
205 .sp
206 .LP
207 When the pointer returned by the reentrant functions \fBgetprojbyname()\fR,
208 \fBgetprojbyid()\fR, and \fBgetprojent()\fR is non-null, it is always equal to
209 the \fIproj\fR pointer that was supplied by the caller.
210 .sp
211 .LP
212 Upon failure, \fBNULL\fR is returned and errno is set to indicate the error.
213 .SH ERRORS
214 .sp
215 .LP
216 The \fBgetprojent()\fR, \fBgetprojbyname()\fR, \fBgetprojbyid()\fR,
217 \fBinproj()\fR, \fBgetprojidbyname()\fR, \fBfgetprojent()\fR, and
218 \fBgetdefaultproj()\fR functions will fail if:
219 .sp
220 .ne 2
221 .na
222 \fB\fBEINTR\fR\fR
223 .ad
224 .RS 10n
225 A signal was caught during the operation.
226 .RE
227
228 .sp
229 .ne 2
230 .na
231 \fB\fBEIO\fR\fR
232 .ad
233 .RS 10n
234 An I/O error has occurred.
235 .RE
236
237 .sp
238 .ne 2
239 .na
240 \fB\fBEMFILE\fR\fR
241 .ad
242 .RS 10n
243 There are \fBOPEN_MAX\fR file descriptors currently open in the calling
244 process.
245 .RE
246
247 .sp
248 .ne 2
249 .na
250 \fB\fBENFILE\fR\fR
251 .ad
252 .RS 10n
253 The maximum allowable number of files is currently open in the system.
254 .RE
255
256 .sp
257 .ne 2
258 .na
259 \fB\fBERANGE\fR\fR
260 .ad
261 .RS 10n
262 Insufficient storage was supplied by \fIbuffer\fR and \fIbufsize\fR to contain
263 the data to be referenced by the resulting \fBproject\fR structure.
264 .RE
265
266 .sp
267 .LP
268 These functions can also fail if the name service switch does not specify valid
269 \fBproject\fR(4) name service sources. In the case of an incompletely
270 configurated name service switch configuration, \fBgetprojbyid()\fR and other
271 functions can return error values other than those documented above. These
272 conditions usually occur when the \fBnsswitch.conf\fR file indicates that one
273 or more name services is providing entries for the project database when that
274 name service does not actually make a project table available.
275 .SH USAGE
276 .sp
277 .LP
278 When compiling multithreaded applications, see \fBIntro\fR(3), Notes On
279 Multithreaded Applications.
280 .sp
281 .LP
282 Use of the enumeration interface \fBgetprojent()\fR is discouraged. Enumeration
283 is supported for the project file, NIS, and LDAP but in general is not
284 efficient. The semantics of enumeration are discussed further in
285 \fBnsswitch.conf\fR(4).
286 .SH ATTRIBUTES
287 .sp
288 .LP
289 See \fBattributes\fR(5) for descriptions of the following attributes:
290 .sp
291
292 .sp
293 .TS
294 box;
295 c | c
296 l | l .
297 ATTRIBUTE TYPE ATTRIBUTE VALUE
298 _
299 Interface Stability Evolving
300 _
301 MT-Level See Description.
302 .TE
303
304 .SH SEE ALSO
305 .sp
306 .LP
307 \fBIntro\fR(3), \fBlibproject\fR(3LIB), \fBproject_walk\fR(3PROJECT),
308 \fBsysconf\fR(3C), \fBnsswitch.conf\fR(4), \fBproject\fR(4),
309 \fBattributes\fR(5)