1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
|
------------------------------------------------------------------------------
-- --
-- FLORIST (FSU Implementation of POSIX.5) COMPONENTS --
-- --
-- P O S I X . P R O C E S S _ I D E N T I F I C A T I O N --
-- --
-- B o d y --
-- --
-- --
-- Copyright (C) 1996-1997 Florida State University --
-- Copyright (C) 1998-2014, AdaCore --
-- --
-- This file is a component of FLORIST, an implementation of an Ada API --
-- for the POSIX OS services, for use with the GNAT Ada compiler and --
-- the FSU Gnu Ada Runtime Library (GNARL). The interface is intended --
-- to be close to that specified in IEEE STD 1003.5: 1990 and IEEE STD --
-- 1003.5b: 1996. --
-- --
-- FLORIST is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the --
-- Free Software Foundation; either version 2, or (at your option) any --
-- later version. FLORIST is distributed in the hope that it will be --
-- useful, but WITHOUT ANY WARRANTY; without even the implied warranty --
-- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. You should have received a --
-- copy of the GNU General Public License distributed with GNARL; see --
-- file COPYING. If not, write to the Free Software Foundation, 59 --
-- Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
------------------------------------------------------------------------------
with POSIX.Implementation;
package body POSIX.Process_Identification is
use POSIX.C,
POSIX.Implementation;
---------------------
-- Get_Process_ID --
---------------------
function getpid return pid_t;
pragma Import (C, getpid, getpid_LINKNAME);
function Get_Process_ID return Process_ID is
begin
return Process_ID (getpid);
end Get_Process_ID;
-----------------------------
-- Get_Parent_Process_ID --
-----------------------------
function Get_Parent_Process_ID return Process_ID is
function getppid return pid_t;
pragma Import (C, getppid, getppid_LINKNAME);
begin
return Process_ID (getppid);
end Get_Parent_Process_ID;
-----------
-- Image --
-----------
function Image (ID : Process_ID)
return Standard.String is
begin
return Process_ID'Image (ID);
end Image;
-----------
-- Value --
-----------
function Value (Str : Standard.String)
return Process_ID is
begin
return Process_ID'Value (Str);
end Value;
--------------------------
-- Get_Process_Group_ID --
--------------------------
-- The getpgrp takes an argument under BSD but not under POSIX.
-- We pass it an argument in all cases and hope that the function
-- call mechanism will not be confused by unexpected arguments.
function getpgrp (ID : Process_ID) return Process_Group_ID;
pragma Import (C, getpgrp, "getpgrp");
function Get_Process_Group_ID return Process_Group_ID is
begin
return getpgrp (Get_Process_ID);
end Get_Process_Group_ID;
--------------------------
-- Set_Process_Group_ID --
--------------------------
function setpgid (pid : pid_t; pgrp : pid_t) return int;
pragma Import (C, setpgid, setpgid_LINKNAME);
procedure Set_Process_Group_ID
(Process : Process_ID := Get_Process_ID;
Process_Group : Process_Group_ID := Get_Process_Group_ID) is
begin
Check (Process /= Null_Process_ID, Invalid_Argument);
Check (setpgid (pid_t (Process), pid_t (Process_Group)));
end Set_Process_Group_ID;
--------------------------
-- Create_Process_Group --
--------------------------
procedure Create_Process_Group
(Process : Process_ID; Process_Group : out Process_Group_ID) is
function setpgid (pid : pid_t; pgrp : pid_t) return int;
pragma Import (C, setpgid, setpgid_LINKNAME);
begin
Check (setpgid (pid_t (Process), 0));
Process_Group := Process_Group_ID (Process);
end Create_Process_Group;
----------------------
-- Create_Session --
----------------------
procedure Create_Session
(Session_Leader : out Process_Group_ID) is
function setsid return pid_t;
pragma Import (C, setsid, setsid_LINKNAME);
begin
Session_Leader := Process_Group_ID (setsid);
if Session_Leader = -1 then
Raise_POSIX_Error;
end if;
end Create_Session;
-----------
-- Image --
-----------
function Image (ID : Process_Group_ID) return Standard.String
renames Process_Group_ID'Image;
-----------
-- Value --
-----------
function Value
(Str : Standard.String) return Process_Group_ID is
begin
return Process_Group_ID'Value (Str);
end Value;
----------------------
-- Get_Real_User_ID --
----------------------
function Get_Real_User_ID return User_ID is
function getuid return uid_t;
pragma Import (C, getuid, getuid_LINKNAME);
begin
return User_ID (getuid);
end Get_Real_User_ID;
---------------------------
-- Get_Effective_user_ID --
---------------------------
function Get_Effective_User_ID return User_ID is
function geteuid return uid_t;
pragma Import (C, geteuid, geteuid_LINKNAME);
begin
return User_ID (geteuid);
end Get_Effective_User_ID;
-----------------
-- Set_User_ID --
-----------------
procedure Set_User_ID (ID : User_ID) is
function setuid (uid : uid_t) return int;
pragma Import (C, setuid, setuid_LINKNAME);
begin
Check (setuid (uid => uid_t (ID)));
end Set_User_ID;
--------------------
-- Get_Login_Name --
--------------------
-- .... Consider using getlogin_r if that is supported.
-- Use conditional code, based on configurable constant
-- HAVE_getlogin_r.
function Get_Login_Name return POSIX.POSIX_String is
function getlogin return char_ptr;
pragma Import (C, getlogin, getlogin_LINKNAME);
Name_Ptr : char_ptr;
begin
Name_Ptr := getlogin;
if Name_Ptr = null then
Raise_POSIX_Error;
end if;
return Form_POSIX_String (Name_Ptr);
end Get_Login_Name;
-----------
-- image --
-----------
function Image (ID : User_ID) return Standard.String is
begin
return User_ID'Image (ID);
end Image;
-----------
-- Value --
-----------
function Value (Str : Standard.String) return User_ID is
begin
return User_ID'Value (Str);
end Value;
-- User Group Identification
-- type Group_ID is private;
-----------------------
-- Get_Real_Group_ID --
-----------------------
function Get_Real_Group_ID return Group_ID is
function getgid return gid_t;
pragma Import (C, getgid, getgid_LINKNAME);
begin
return Group_ID (getgid);
end Get_Real_Group_ID;
----------------------------
-- Get_Effective_Group_ID --
----------------------------
function Get_Effective_Group_ID return Group_ID is
function getegid return gid_t;
pragma Import (C, getegid, getegid_LINKNAME);
begin
return Group_ID (getegid);
end Get_Effective_Group_ID;
------------------
-- Set_Group_ID --
------------------
procedure Set_Group_ID (ID : Group_ID) is
function setgid (gid : gid_t) return int;
pragma Import (C, setgid, setgid_LINKNAME);
begin
Check (setgid (gid_t (ID)));
end Set_Group_ID;
----------------
-- Get_Groups --
----------------
type Access_Group_ID is access all Group_ID;
function Get_Groups return Group_List is
function getgroups
(gidsetsize : int; grouplist : Access_Group_ID) return C.int;
pragma Import (C, getgroups, getgroups_LINKNAME);
begin
loop
declare
NGroups_1 : constant int := getgroups (0, null);
Groups : aliased Group_List (1 .. Integer (NGroups_1));
NGroups_2 : int;
begin
NGroups_2 :=
getgroups (Groups'Length, Groups (1)'Unchecked_Access);
Check (NGroups_2);
if NGroups_1 = NGroups_2 then
return Groups;
end if;
end;
end loop;
-- the loop is in case some other process changes the number of
-- items in the group list,
-- before the first and second call to getgroups
end Get_Groups;
-----------
-- Image --
-----------
function Image (ID : Group_ID) return Standard.String is
begin
return Trim_Leading_Blank (Group_ID'Image (ID));
end Image;
-----------
-- Value --
-----------
function Value (Str : Standard.String) return Group_ID is
begin
return Group_ID (Group_ID'Value (Str));
end Value;
end POSIX.Process_Identification;
|
