1/* Copyright (C) 1991-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published
6 by the Free Software Foundation; version 2 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, see <https://www.gnu.org/licenses/>. */
16
17#include <unistd.h>
18#include <errno.h>
19#include <error.h>
20#include <libintl.h>
21#include <locale.h>
22#include <string.h>
23#include <stdlib.h>
24#include <stdio.h>
25
26#include "../version.h"
27#define PACKAGE _libc_intl_domainname
28
29#define NEED_SPEC_ARRAY 1
30#include <posix-conf-vars.h>
31
32/* If all of the environments are defined in environments.h, then we don't need
33 to bother with doing a runtime check for a specific environment. */
34#if (defined _SC_V6_ILP32_OFF32 \
35 && defined _SC_V7_LPBIG_OFFBIG \
36 && defined _SC_XBS5_LP64_OFF64 \
37 && defined _SC_V6_LP64_OFF64 \
38 && defined _SC_V7_ILP32_OFFBIG \
39 && defined _SC_V6_LPBIG_OFFBIG \
40 && defined _SC_V7_LP64_OFF64 \
41 && defined _SC_V7_ILP32_OFF32 \
42 && defined _SC_XBS5_LPBIG_OFFBIG \
43 && defined _SC_XBS5_ILP32_OFFBIG \
44 && defined _SC_V6_ILP32_OFFBIG \
45 && defined _SC_XBS5_ILP32_OFF32)
46# define ALL_ENVIRONMENTS_DEFINED 1
47#endif
48
49struct conf
50 {
51 const char *name;
52 const int call_name;
53 const enum { SYSCONF, CONFSTR, PATHCONF } call;
54 };
55
56static const struct conf vars[] =
57 {
58 { "LINK_MAX", _PC_LINK_MAX, PATHCONF },
59 { "_POSIX_LINK_MAX", _PC_LINK_MAX, PATHCONF },
60 { "MAX_CANON", _PC_MAX_CANON, PATHCONF },
61 { "_POSIX_MAX_CANON", _PC_MAX_CANON, PATHCONF },
62 { "MAX_INPUT", _PC_MAX_INPUT, PATHCONF },
63 { "_POSIX_MAX_INPUT", _PC_MAX_INPUT, PATHCONF },
64 { "NAME_MAX", _PC_NAME_MAX, PATHCONF },
65 { "_POSIX_NAME_MAX", _PC_NAME_MAX, PATHCONF },
66 { "PATH_MAX", _PC_PATH_MAX, PATHCONF },
67 { "_POSIX_PATH_MAX", _PC_PATH_MAX, PATHCONF },
68 { "PIPE_BUF", _PC_PIPE_BUF, PATHCONF },
69 { "_POSIX_PIPE_BUF", _PC_PIPE_BUF, PATHCONF },
70 { "SOCK_MAXBUF", _PC_SOCK_MAXBUF, PATHCONF },
71 { "_POSIX_ASYNC_IO", _PC_ASYNC_IO, PATHCONF },
72 { "_POSIX_CHOWN_RESTRICTED", _PC_CHOWN_RESTRICTED, PATHCONF },
73 { "_POSIX_NO_TRUNC", _PC_NO_TRUNC, PATHCONF },
74 { "_POSIX_PRIO_IO", _PC_PRIO_IO, PATHCONF },
75 { "_POSIX_SYNC_IO", _PC_SYNC_IO, PATHCONF },
76 { "_POSIX_VDISABLE", _PC_VDISABLE, PATHCONF },
77
78 { "ARG_MAX", _SC_ARG_MAX, SYSCONF },
79 { "ATEXIT_MAX", _SC_ATEXIT_MAX, SYSCONF },
80 { "CHAR_BIT", _SC_CHAR_BIT, SYSCONF },
81 { "CHAR_MAX", _SC_CHAR_MAX, SYSCONF },
82 { "CHAR_MIN", _SC_CHAR_MIN, SYSCONF },
83 { "CHILD_MAX", _SC_CHILD_MAX, SYSCONF },
84 { "CLK_TCK", _SC_CLK_TCK, SYSCONF },
85 { "INT_MAX", _SC_INT_MAX, SYSCONF },
86 { "INT_MIN", _SC_INT_MIN, SYSCONF },
87 { "IOV_MAX", _SC_UIO_MAXIOV, SYSCONF },
88 { "LOGNAME_MAX", _SC_LOGIN_NAME_MAX, SYSCONF },
89 { "LONG_BIT", _SC_LONG_BIT, SYSCONF },
90 { "MB_LEN_MAX", _SC_MB_LEN_MAX, SYSCONF },
91 { "NGROUPS_MAX", _SC_NGROUPS_MAX, SYSCONF },
92 { "NL_ARGMAX", _SC_NL_ARGMAX, SYSCONF },
93 { "NL_LANGMAX", _SC_NL_LANGMAX, SYSCONF },
94 { "NL_MSGMAX", _SC_NL_MSGMAX, SYSCONF },
95 { "NL_NMAX", _SC_NL_NMAX, SYSCONF },
96 { "NL_SETMAX", _SC_NL_SETMAX, SYSCONF },
97 { "NL_TEXTMAX", _SC_NL_TEXTMAX, SYSCONF },
98 { "NSS_BUFLEN_GROUP", _SC_GETGR_R_SIZE_MAX, SYSCONF },
99 { "NSS_BUFLEN_PASSWD", _SC_GETPW_R_SIZE_MAX, SYSCONF },
100 { "NZERO", _SC_NZERO, SYSCONF },
101 { "OPEN_MAX", _SC_OPEN_MAX, SYSCONF },
102 { "PAGESIZE", _SC_PAGESIZE, SYSCONF },
103 { "PAGE_SIZE", _SC_PAGESIZE, SYSCONF },
104 { "PASS_MAX", _SC_PASS_MAX, SYSCONF },
105 { "PTHREAD_DESTRUCTOR_ITERATIONS", _SC_THREAD_DESTRUCTOR_ITERATIONS, SYSCONF },
106 { "PTHREAD_KEYS_MAX", _SC_THREAD_KEYS_MAX, SYSCONF },
107 { "PTHREAD_STACK_MIN", _SC_THREAD_STACK_MIN, SYSCONF },
108 { "PTHREAD_THREADS_MAX", _SC_THREAD_THREADS_MAX, SYSCONF },
109 { "SCHAR_MAX", _SC_SCHAR_MAX, SYSCONF },
110 { "SCHAR_MIN", _SC_SCHAR_MIN, SYSCONF },
111 { "SHRT_MAX", _SC_SHRT_MAX, SYSCONF },
112 { "SHRT_MIN", _SC_SHRT_MIN, SYSCONF },
113 { "SSIZE_MAX", _SC_SSIZE_MAX, SYSCONF },
114 { "TTY_NAME_MAX", _SC_TTY_NAME_MAX, SYSCONF },
115 { "TZNAME_MAX", _SC_TZNAME_MAX, SYSCONF },
116 { "UCHAR_MAX", _SC_UCHAR_MAX, SYSCONF },
117 { "UINT_MAX", _SC_UINT_MAX, SYSCONF },
118 { "UIO_MAXIOV", _SC_UIO_MAXIOV, SYSCONF },
119 { "ULONG_MAX", _SC_ULONG_MAX, SYSCONF },
120 { "USHRT_MAX", _SC_USHRT_MAX, SYSCONF },
121 { "WORD_BIT", _SC_WORD_BIT, SYSCONF },
122 { "_AVPHYS_PAGES", _SC_AVPHYS_PAGES, SYSCONF },
123 { "_NPROCESSORS_CONF", _SC_NPROCESSORS_CONF, SYSCONF },
124 { "_NPROCESSORS_ONLN", _SC_NPROCESSORS_ONLN, SYSCONF },
125 { "_PHYS_PAGES", _SC_PHYS_PAGES, SYSCONF },
126 { "_POSIX_ARG_MAX", _SC_ARG_MAX, SYSCONF },
127 { "_POSIX_ASYNCHRONOUS_IO", _SC_ASYNCHRONOUS_IO, SYSCONF },
128 { "_POSIX_CHILD_MAX", _SC_CHILD_MAX, SYSCONF },
129 { "_POSIX_FSYNC", _SC_FSYNC, SYSCONF },
130 { "_POSIX_JOB_CONTROL", _SC_JOB_CONTROL, SYSCONF },
131 { "_POSIX_MAPPED_FILES", _SC_MAPPED_FILES, SYSCONF },
132 { "_POSIX_MEMLOCK", _SC_MEMLOCK, SYSCONF },
133 { "_POSIX_MEMLOCK_RANGE", _SC_MEMLOCK_RANGE, SYSCONF },
134 { "_POSIX_MEMORY_PROTECTION", _SC_MEMORY_PROTECTION, SYSCONF },
135 { "_POSIX_MESSAGE_PASSING", _SC_MESSAGE_PASSING, SYSCONF },
136 { "_POSIX_NGROUPS_MAX", _SC_NGROUPS_MAX, SYSCONF },
137 { "_POSIX_OPEN_MAX", _SC_OPEN_MAX, SYSCONF },
138 { "_POSIX_PII", _SC_PII, SYSCONF },
139 { "_POSIX_PII_INTERNET", _SC_PII_INTERNET, SYSCONF },
140 { "_POSIX_PII_INTERNET_DGRAM", _SC_PII_INTERNET_DGRAM, SYSCONF },
141 { "_POSIX_PII_INTERNET_STREAM", _SC_PII_INTERNET_STREAM, SYSCONF },
142 { "_POSIX_PII_OSI", _SC_PII_OSI, SYSCONF },
143 { "_POSIX_PII_OSI_CLTS", _SC_PII_OSI_CLTS, SYSCONF },
144 { "_POSIX_PII_OSI_COTS", _SC_PII_OSI_COTS, SYSCONF },
145 { "_POSIX_PII_OSI_M", _SC_PII_OSI_M, SYSCONF },
146 { "_POSIX_PII_SOCKET", _SC_PII_SOCKET, SYSCONF },
147 { "_POSIX_PII_XTI", _SC_PII_XTI, SYSCONF },
148 { "_POSIX_POLL", _SC_POLL, SYSCONF },
149 { "_POSIX_PRIORITIZED_IO", _SC_PRIORITIZED_IO, SYSCONF },
150 { "_POSIX_PRIORITY_SCHEDULING", _SC_PRIORITY_SCHEDULING, SYSCONF },
151 { "_POSIX_REALTIME_SIGNALS", _SC_REALTIME_SIGNALS, SYSCONF },
152 { "_POSIX_SAVED_IDS", _SC_SAVED_IDS, SYSCONF },
153 { "_POSIX_SELECT", _SC_SELECT, SYSCONF },
154 { "_POSIX_SEMAPHORES", _SC_SEMAPHORES, SYSCONF },
155 { "_POSIX_SHARED_MEMORY_OBJECTS", _SC_SHARED_MEMORY_OBJECTS, SYSCONF },
156 { "_POSIX_SSIZE_MAX", _SC_SSIZE_MAX, SYSCONF },
157 { "_POSIX_STREAM_MAX", _SC_STREAM_MAX, SYSCONF },
158 { "_POSIX_SYNCHRONIZED_IO", _SC_SYNCHRONIZED_IO, SYSCONF },
159 { "_POSIX_THREADS", _SC_THREADS, SYSCONF },
160 { "_POSIX_THREAD_ATTR_STACKADDR", _SC_THREAD_ATTR_STACKADDR, SYSCONF },
161 { "_POSIX_THREAD_ATTR_STACKSIZE", _SC_THREAD_ATTR_STACKSIZE, SYSCONF },
162 { "_POSIX_THREAD_PRIORITY_SCHEDULING", _SC_THREAD_PRIORITY_SCHEDULING, SYSCONF },
163 { "_POSIX_THREAD_PRIO_INHERIT", _SC_THREAD_PRIO_INHERIT, SYSCONF },
164 { "_POSIX_THREAD_PRIO_PROTECT", _SC_THREAD_PRIO_PROTECT, SYSCONF },
165 { "_POSIX_THREAD_ROBUST_PRIO_INHERIT", _SC_THREAD_ROBUST_PRIO_INHERIT,
166 SYSCONF },
167 { "_POSIX_THREAD_ROBUST_PRIO_PROTECT", _SC_THREAD_ROBUST_PRIO_PROTECT,
168 SYSCONF },
169 { "_POSIX_THREAD_PROCESS_SHARED", _SC_THREAD_PROCESS_SHARED, SYSCONF },
170 { "_POSIX_THREAD_SAFE_FUNCTIONS", _SC_THREAD_SAFE_FUNCTIONS, SYSCONF },
171 { "_POSIX_TIMERS", _SC_TIMERS, SYSCONF },
172 { "TIMER_MAX", _SC_TIMER_MAX, SYSCONF },
173 { "_POSIX_TZNAME_MAX", _SC_TZNAME_MAX, SYSCONF },
174 { "_POSIX_VERSION", _SC_VERSION, SYSCONF },
175 { "_T_IOV_MAX", _SC_T_IOV_MAX, SYSCONF },
176 { "_XOPEN_CRYPT", _SC_XOPEN_CRYPT, SYSCONF },
177 { "_XOPEN_ENH_I18N", _SC_XOPEN_ENH_I18N, SYSCONF },
178 { "_XOPEN_LEGACY", _SC_XOPEN_LEGACY, SYSCONF },
179 { "_XOPEN_REALTIME", _SC_XOPEN_REALTIME, SYSCONF },
180 { "_XOPEN_REALTIME_THREADS", _SC_XOPEN_REALTIME_THREADS, SYSCONF },
181 { "_XOPEN_SHM", _SC_XOPEN_SHM, SYSCONF },
182 { "_XOPEN_UNIX", _SC_XOPEN_UNIX, SYSCONF },
183 { "_XOPEN_VERSION", _SC_XOPEN_VERSION, SYSCONF },
184 { "_XOPEN_XCU_VERSION", _SC_XOPEN_XCU_VERSION, SYSCONF },
185 { "_XOPEN_XPG2", _SC_XOPEN_XPG2, SYSCONF },
186 { "_XOPEN_XPG3", _SC_XOPEN_XPG3, SYSCONF },
187 { "_XOPEN_XPG4", _SC_XOPEN_XPG4, SYSCONF },
188 /* POSIX.2 */
189 { "BC_BASE_MAX", _SC_BC_BASE_MAX, SYSCONF },
190 { "BC_DIM_MAX", _SC_BC_DIM_MAX, SYSCONF },
191 { "BC_SCALE_MAX", _SC_BC_SCALE_MAX, SYSCONF },
192 { "BC_STRING_MAX", _SC_BC_STRING_MAX, SYSCONF },
193 { "CHARCLASS_NAME_MAX", _SC_CHARCLASS_NAME_MAX, SYSCONF },
194 { "COLL_WEIGHTS_MAX", _SC_COLL_WEIGHTS_MAX, SYSCONF },
195 { "EQUIV_CLASS_MAX", _SC_EQUIV_CLASS_MAX, SYSCONF },
196 { "EXPR_NEST_MAX", _SC_EXPR_NEST_MAX, SYSCONF },
197 { "LINE_MAX", _SC_LINE_MAX, SYSCONF },
198 { "POSIX2_BC_BASE_MAX", _SC_BC_BASE_MAX, SYSCONF },
199 { "POSIX2_BC_DIM_MAX", _SC_BC_DIM_MAX, SYSCONF },
200 { "POSIX2_BC_SCALE_MAX", _SC_BC_SCALE_MAX, SYSCONF },
201 { "POSIX2_BC_STRING_MAX", _SC_BC_STRING_MAX, SYSCONF },
202 { "POSIX2_CHAR_TERM", _SC_2_CHAR_TERM, SYSCONF },
203 { "POSIX2_COLL_WEIGHTS_MAX", _SC_COLL_WEIGHTS_MAX, SYSCONF },
204 { "POSIX2_C_BIND", _SC_2_C_BIND, SYSCONF },
205 { "POSIX2_C_DEV", _SC_2_C_DEV, SYSCONF },
206 { "POSIX2_C_VERSION", _SC_2_C_VERSION, SYSCONF },
207 { "POSIX2_EXPR_NEST_MAX", _SC_EXPR_NEST_MAX, SYSCONF },
208 { "POSIX2_FORT_DEV", _SC_2_FORT_DEV, SYSCONF },
209 { "POSIX2_FORT_RUN", _SC_2_FORT_RUN, SYSCONF },
210 { "_POSIX2_LINE_MAX", _SC_LINE_MAX, SYSCONF },
211 { "POSIX2_LINE_MAX", _SC_LINE_MAX, SYSCONF },
212 { "POSIX2_LOCALEDEF", _SC_2_LOCALEDEF, SYSCONF },
213 { "POSIX2_RE_DUP_MAX", _SC_RE_DUP_MAX, SYSCONF },
214 { "POSIX2_SW_DEV", _SC_2_SW_DEV, SYSCONF },
215 { "POSIX2_UPE", _SC_2_UPE, SYSCONF },
216 { "POSIX2_VERSION", _SC_2_VERSION, SYSCONF },
217 { "RE_DUP_MAX", _SC_RE_DUP_MAX, SYSCONF },
218
219 { "PATH", _CS_PATH, CONFSTR },
220 { "CS_PATH", _CS_PATH, CONFSTR },
221
222 /* LFS */
223 { "LFS_CFLAGS", _CS_LFS_CFLAGS, CONFSTR },
224 { "LFS_LDFLAGS", _CS_LFS_LDFLAGS, CONFSTR },
225 { "LFS_LIBS", _CS_LFS_LIBS, CONFSTR },
226 { "LFS_LINTFLAGS", _CS_LFS_LINTFLAGS, CONFSTR },
227 { "LFS64_CFLAGS", _CS_LFS64_CFLAGS, CONFSTR },
228 { "LFS64_LDFLAGS", _CS_LFS64_LDFLAGS, CONFSTR },
229 { "LFS64_LIBS", _CS_LFS64_LIBS, CONFSTR },
230 { "LFS64_LINTFLAGS", _CS_LFS64_LINTFLAGS, CONFSTR },
231
232 /* Programming environments. */
233 { "_XBS5_WIDTH_RESTRICTED_ENVS", _CS_V5_WIDTH_RESTRICTED_ENVS, CONFSTR },
234 { "XBS5_WIDTH_RESTRICTED_ENVS", _CS_V5_WIDTH_RESTRICTED_ENVS, CONFSTR },
235
236 { "_XBS5_ILP32_OFF32", _SC_XBS5_ILP32_OFF32, SYSCONF },
237 { "XBS5_ILP32_OFF32_CFLAGS", _CS_XBS5_ILP32_OFF32_CFLAGS, CONFSTR },
238 { "XBS5_ILP32_OFF32_LDFLAGS", _CS_XBS5_ILP32_OFF32_LDFLAGS, CONFSTR },
239 { "XBS5_ILP32_OFF32_LIBS", _CS_XBS5_ILP32_OFF32_LIBS, CONFSTR },
240 { "XBS5_ILP32_OFF32_LINTFLAGS", _CS_XBS5_ILP32_OFF32_LINTFLAGS, CONFSTR },
241
242 { "_XBS5_ILP32_OFFBIG", _SC_XBS5_ILP32_OFFBIG, SYSCONF },
243 { "XBS5_ILP32_OFFBIG_CFLAGS", _CS_XBS5_ILP32_OFFBIG_CFLAGS, CONFSTR },
244 { "XBS5_ILP32_OFFBIG_LDFLAGS", _CS_XBS5_ILP32_OFFBIG_LDFLAGS, CONFSTR },
245 { "XBS5_ILP32_OFFBIG_LIBS", _CS_XBS5_ILP32_OFFBIG_LIBS, CONFSTR },
246 { "XBS5_ILP32_OFFBIG_LINTFLAGS", _CS_XBS5_ILP32_OFFBIG_LINTFLAGS, CONFSTR },
247
248 { "_XBS5_LP64_OFF64", _SC_XBS5_LP64_OFF64, SYSCONF },
249 { "XBS5_LP64_OFF64_CFLAGS", _CS_XBS5_LP64_OFF64_CFLAGS, CONFSTR },
250 { "XBS5_LP64_OFF64_LDFLAGS", _CS_XBS5_LP64_OFF64_LDFLAGS, CONFSTR },
251 { "XBS5_LP64_OFF64_LIBS", _CS_XBS5_LP64_OFF64_LIBS, CONFSTR },
252 { "XBS5_LP64_OFF64_LINTFLAGS", _CS_XBS5_LP64_OFF64_LINTFLAGS, CONFSTR },
253
254 { "_XBS5_LPBIG_OFFBIG", _SC_XBS5_LPBIG_OFFBIG, SYSCONF },
255 { "XBS5_LPBIG_OFFBIG_CFLAGS", _CS_XBS5_LPBIG_OFFBIG_CFLAGS, CONFSTR },
256 { "XBS5_LPBIG_OFFBIG_LDFLAGS", _CS_XBS5_LPBIG_OFFBIG_LDFLAGS, CONFSTR },
257 { "XBS5_LPBIG_OFFBIG_LIBS", _CS_XBS5_LPBIG_OFFBIG_LIBS, CONFSTR },
258 { "XBS5_LPBIG_OFFBIG_LINTFLAGS", _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS, CONFSTR },
259
260 { "_POSIX_V6_ILP32_OFF32", _SC_V6_ILP32_OFF32, SYSCONF },
261 { "POSIX_V6_ILP32_OFF32_CFLAGS", _CS_POSIX_V6_ILP32_OFF32_CFLAGS, CONFSTR },
262 { "POSIX_V6_ILP32_OFF32_LDFLAGS", _CS_POSIX_V6_ILP32_OFF32_LDFLAGS, CONFSTR },
263 { "POSIX_V6_ILP32_OFF32_LIBS", _CS_POSIX_V6_ILP32_OFF32_LIBS, CONFSTR },
264 { "POSIX_V6_ILP32_OFF32_LINTFLAGS", _CS_POSIX_V6_ILP32_OFF32_LINTFLAGS, CONFSTR },
265
266 { "_POSIX_V6_WIDTH_RESTRICTED_ENVS", _CS_V6_WIDTH_RESTRICTED_ENVS, CONFSTR },
267 { "POSIX_V6_WIDTH_RESTRICTED_ENVS", _CS_V6_WIDTH_RESTRICTED_ENVS, CONFSTR },
268
269 { "_POSIX_V6_ILP32_OFFBIG", _SC_V6_ILP32_OFFBIG, SYSCONF },
270 { "POSIX_V6_ILP32_OFFBIG_CFLAGS", _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS, CONFSTR },
271 { "POSIX_V6_ILP32_OFFBIG_LDFLAGS", _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS, CONFSTR },
272 { "POSIX_V6_ILP32_OFFBIG_LIBS", _CS_POSIX_V6_ILP32_OFFBIG_LIBS, CONFSTR },
273 { "POSIX_V6_ILP32_OFFBIG_LINTFLAGS", _CS_POSIX_V6_ILP32_OFFBIG_LINTFLAGS, CONFSTR },
274
275 { "_POSIX_V6_LP64_OFF64", _SC_V6_LP64_OFF64, SYSCONF },
276 { "POSIX_V6_LP64_OFF64_CFLAGS", _CS_POSIX_V6_LP64_OFF64_CFLAGS, CONFSTR },
277 { "POSIX_V6_LP64_OFF64_LDFLAGS", _CS_POSIX_V6_LP64_OFF64_LDFLAGS, CONFSTR },
278 { "POSIX_V6_LP64_OFF64_LIBS", _CS_POSIX_V6_LP64_OFF64_LIBS, CONFSTR },
279 { "POSIX_V6_LP64_OFF64_LINTFLAGS", _CS_POSIX_V6_LP64_OFF64_LINTFLAGS, CONFSTR },
280
281 { "_POSIX_V6_LPBIG_OFFBIG", _SC_V6_LPBIG_OFFBIG, SYSCONF },
282 { "POSIX_V6_LPBIG_OFFBIG_CFLAGS", _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS, CONFSTR },
283 { "POSIX_V6_LPBIG_OFFBIG_LDFLAGS", _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS, CONFSTR },
284 { "POSIX_V6_LPBIG_OFFBIG_LIBS", _CS_POSIX_V6_LPBIG_OFFBIG_LIBS, CONFSTR },
285 { "POSIX_V6_LPBIG_OFFBIG_LINTFLAGS", _CS_POSIX_V6_LPBIG_OFFBIG_LINTFLAGS, CONFSTR },
286
287 { "_POSIX_V7_ILP32_OFF32", _SC_V7_ILP32_OFF32, SYSCONF },
288 { "POSIX_V7_ILP32_OFF32_CFLAGS", _CS_POSIX_V7_ILP32_OFF32_CFLAGS, CONFSTR },
289 { "POSIX_V7_ILP32_OFF32_LDFLAGS", _CS_POSIX_V7_ILP32_OFF32_LDFLAGS, CONFSTR },
290 { "POSIX_V7_ILP32_OFF32_LIBS", _CS_POSIX_V7_ILP32_OFF32_LIBS, CONFSTR },
291 { "POSIX_V7_ILP32_OFF32_LINTFLAGS", _CS_POSIX_V7_ILP32_OFF32_LINTFLAGS, CONFSTR },
292
293 { "_POSIX_V7_WIDTH_RESTRICTED_ENVS", _CS_V7_WIDTH_RESTRICTED_ENVS, CONFSTR },
294 { "POSIX_V7_WIDTH_RESTRICTED_ENVS", _CS_V7_WIDTH_RESTRICTED_ENVS, CONFSTR },
295
296 { "_POSIX_V7_ILP32_OFFBIG", _SC_V7_ILP32_OFFBIG, SYSCONF },
297 { "POSIX_V7_ILP32_OFFBIG_CFLAGS", _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS, CONFSTR },
298 { "POSIX_V7_ILP32_OFFBIG_LDFLAGS", _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS, CONFSTR },
299 { "POSIX_V7_ILP32_OFFBIG_LIBS", _CS_POSIX_V7_ILP32_OFFBIG_LIBS, CONFSTR },
300 { "POSIX_V7_ILP32_OFFBIG_LINTFLAGS", _CS_POSIX_V7_ILP32_OFFBIG_LINTFLAGS, CONFSTR },
301
302 { "_POSIX_V7_LP64_OFF64", _SC_V7_LP64_OFF64, SYSCONF },
303 { "POSIX_V7_LP64_OFF64_CFLAGS", _CS_POSIX_V7_LP64_OFF64_CFLAGS, CONFSTR },
304 { "POSIX_V7_LP64_OFF64_LDFLAGS", _CS_POSIX_V7_LP64_OFF64_LDFLAGS, CONFSTR },
305 { "POSIX_V7_LP64_OFF64_LIBS", _CS_POSIX_V7_LP64_OFF64_LIBS, CONFSTR },
306 { "POSIX_V7_LP64_OFF64_LINTFLAGS", _CS_POSIX_V7_LP64_OFF64_LINTFLAGS, CONFSTR },
307
308 { "_POSIX_V7_LPBIG_OFFBIG", _SC_V7_LPBIG_OFFBIG, SYSCONF },
309 { "POSIX_V7_LPBIG_OFFBIG_CFLAGS", _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS, CONFSTR },
310 { "POSIX_V7_LPBIG_OFFBIG_LDFLAGS", _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS, CONFSTR },
311 { "POSIX_V7_LPBIG_OFFBIG_LIBS", _CS_POSIX_V7_LPBIG_OFFBIG_LIBS, CONFSTR },
312 { "POSIX_V7_LPBIG_OFFBIG_LINTFLAGS", _CS_POSIX_V7_LPBIG_OFFBIG_LINTFLAGS, CONFSTR },
313
314 { "_POSIX_ADVISORY_INFO", _SC_ADVISORY_INFO, SYSCONF },
315 { "_POSIX_BARRIERS", _SC_BARRIERS, SYSCONF },
316 { "_POSIX_BASE", _SC_BASE, SYSCONF },
317 { "_POSIX_C_LANG_SUPPORT", _SC_C_LANG_SUPPORT, SYSCONF },
318 { "_POSIX_C_LANG_SUPPORT_R", _SC_C_LANG_SUPPORT_R, SYSCONF },
319 { "_POSIX_CLOCK_SELECTION", _SC_CLOCK_SELECTION, SYSCONF },
320 { "_POSIX_CPUTIME", _SC_CPUTIME, SYSCONF },
321 { "_POSIX_THREAD_CPUTIME", _SC_THREAD_CPUTIME, SYSCONF },
322 { "_POSIX_DEVICE_SPECIFIC", _SC_DEVICE_SPECIFIC, SYSCONF },
323 { "_POSIX_DEVICE_SPECIFIC_R", _SC_DEVICE_SPECIFIC_R, SYSCONF },
324 { "_POSIX_FD_MGMT", _SC_FD_MGMT, SYSCONF },
325 { "_POSIX_FIFO", _SC_FIFO, SYSCONF },
326 { "_POSIX_PIPE", _SC_PIPE, SYSCONF },
327 { "_POSIX_FILE_ATTRIBUTES", _SC_FILE_ATTRIBUTES, SYSCONF },
328 { "_POSIX_FILE_LOCKING", _SC_FILE_LOCKING, SYSCONF },
329 { "_POSIX_FILE_SYSTEM", _SC_FILE_SYSTEM, SYSCONF },
330 { "_POSIX_MONOTONIC_CLOCK", _SC_MONOTONIC_CLOCK, SYSCONF },
331 { "_POSIX_MULTI_PROCESS", _SC_MULTI_PROCESS, SYSCONF },
332 { "_POSIX_SINGLE_PROCESS", _SC_SINGLE_PROCESS, SYSCONF },
333 { "_POSIX_NETWORKING", _SC_NETWORKING, SYSCONF },
334 { "_POSIX_READER_WRITER_LOCKS", _SC_READER_WRITER_LOCKS, SYSCONF },
335 { "_POSIX_SPIN_LOCKS", _SC_SPIN_LOCKS, SYSCONF },
336 { "_POSIX_REGEXP", _SC_REGEXP, SYSCONF },
337 { "_REGEX_VERSION", _SC_REGEX_VERSION, SYSCONF },
338 { "_POSIX_SHELL", _SC_SHELL, SYSCONF },
339 { "_POSIX_SIGNALS", _SC_SIGNALS, SYSCONF },
340 { "_POSIX_SPAWN", _SC_SPAWN, SYSCONF },
341 { "_POSIX_SPORADIC_SERVER", _SC_SPORADIC_SERVER, SYSCONF },
342 { "_POSIX_THREAD_SPORADIC_SERVER", _SC_THREAD_SPORADIC_SERVER, SYSCONF },
343 { "_POSIX_SYSTEM_DATABASE", _SC_SYSTEM_DATABASE, SYSCONF },
344 { "_POSIX_SYSTEM_DATABASE_R", _SC_SYSTEM_DATABASE_R, SYSCONF },
345 { "_POSIX_TIMEOUTS", _SC_TIMEOUTS, SYSCONF },
346 { "_POSIX_TYPED_MEMORY_OBJECTS", _SC_TYPED_MEMORY_OBJECTS, SYSCONF },
347 { "_POSIX_USER_GROUPS", _SC_USER_GROUPS, SYSCONF },
348 { "_POSIX_USER_GROUPS_R", _SC_USER_GROUPS_R, SYSCONF },
349 { "POSIX2_PBS", _SC_2_PBS, SYSCONF },
350 { "POSIX2_PBS_ACCOUNTING", _SC_2_PBS_ACCOUNTING, SYSCONF },
351 { "POSIX2_PBS_LOCATE", _SC_2_PBS_LOCATE, SYSCONF },
352 { "POSIX2_PBS_TRACK", _SC_2_PBS_TRACK, SYSCONF },
353 { "POSIX2_PBS_MESSAGE", _SC_2_PBS_MESSAGE, SYSCONF },
354 { "SYMLOOP_MAX", _SC_SYMLOOP_MAX, SYSCONF },
355 { "STREAM_MAX", _SC_STREAM_MAX, SYSCONF },
356 { "AIO_LISTIO_MAX", _SC_AIO_LISTIO_MAX, SYSCONF },
357 { "AIO_MAX", _SC_AIO_MAX, SYSCONF },
358 { "AIO_PRIO_DELTA_MAX", _SC_AIO_PRIO_DELTA_MAX, SYSCONF },
359 { "DELAYTIMER_MAX", _SC_DELAYTIMER_MAX, SYSCONF },
360 { "HOST_NAME_MAX", _SC_HOST_NAME_MAX, SYSCONF },
361 { "LOGIN_NAME_MAX", _SC_LOGIN_NAME_MAX, SYSCONF },
362 { "MQ_OPEN_MAX", _SC_MQ_OPEN_MAX, SYSCONF },
363 { "MQ_PRIO_MAX", _SC_MQ_PRIO_MAX, SYSCONF },
364 { "_POSIX_DEVICE_IO", _SC_DEVICE_IO, SYSCONF },
365 { "_POSIX_TRACE", _SC_TRACE, SYSCONF },
366 { "_POSIX_TRACE_EVENT_FILTER", _SC_TRACE_EVENT_FILTER, SYSCONF },
367 { "_POSIX_TRACE_INHERIT", _SC_TRACE_INHERIT, SYSCONF },
368 { "_POSIX_TRACE_LOG", _SC_TRACE_LOG, SYSCONF },
369 { "RTSIG_MAX", _SC_RTSIG_MAX, SYSCONF },
370 { "SEM_NSEMS_MAX", _SC_SEM_NSEMS_MAX, SYSCONF },
371 { "SEM_VALUE_MAX", _SC_SEM_VALUE_MAX, SYSCONF },
372 { "SIGQUEUE_MAX", _SC_SIGQUEUE_MAX, SYSCONF },
373 { "FILESIZEBITS", _PC_FILESIZEBITS, PATHCONF },
374 { "POSIX_ALLOC_SIZE_MIN", _PC_ALLOC_SIZE_MIN, PATHCONF },
375 { "POSIX_REC_INCR_XFER_SIZE", _PC_REC_INCR_XFER_SIZE, PATHCONF },
376 { "POSIX_REC_MAX_XFER_SIZE", _PC_REC_MAX_XFER_SIZE, PATHCONF },
377 { "POSIX_REC_MIN_XFER_SIZE", _PC_REC_MIN_XFER_SIZE, PATHCONF },
378 { "POSIX_REC_XFER_ALIGN", _PC_REC_XFER_ALIGN, PATHCONF },
379 { "SYMLINK_MAX", _PC_SYMLINK_MAX, PATHCONF },
380 { "GNU_LIBC_VERSION", _CS_GNU_LIBC_VERSION, CONFSTR },
381 { "GNU_LIBPTHREAD_VERSION", _CS_GNU_LIBPTHREAD_VERSION, CONFSTR },
382 { "POSIX2_SYMLINKS", _PC_2_SYMLINKS, PATHCONF },
383
384 { "LEVEL1_ICACHE_SIZE", _SC_LEVEL1_ICACHE_SIZE, SYSCONF },
385 { "LEVEL1_ICACHE_ASSOC", _SC_LEVEL1_ICACHE_ASSOC, SYSCONF },
386 { "LEVEL1_ICACHE_LINESIZE", _SC_LEVEL1_ICACHE_LINESIZE, SYSCONF },
387 { "LEVEL1_DCACHE_SIZE", _SC_LEVEL1_DCACHE_SIZE, SYSCONF },
388 { "LEVEL1_DCACHE_ASSOC", _SC_LEVEL1_DCACHE_ASSOC, SYSCONF },
389 { "LEVEL1_DCACHE_LINESIZE", _SC_LEVEL1_DCACHE_LINESIZE, SYSCONF },
390 { "LEVEL2_CACHE_SIZE", _SC_LEVEL2_CACHE_SIZE, SYSCONF },
391 { "LEVEL2_CACHE_ASSOC", _SC_LEVEL2_CACHE_ASSOC, SYSCONF },
392 { "LEVEL2_CACHE_LINESIZE", _SC_LEVEL2_CACHE_LINESIZE, SYSCONF },
393 { "LEVEL3_CACHE_SIZE", _SC_LEVEL3_CACHE_SIZE, SYSCONF },
394 { "LEVEL3_CACHE_ASSOC", _SC_LEVEL3_CACHE_ASSOC, SYSCONF },
395 { "LEVEL3_CACHE_LINESIZE", _SC_LEVEL3_CACHE_LINESIZE, SYSCONF },
396 { "LEVEL4_CACHE_SIZE", _SC_LEVEL4_CACHE_SIZE, SYSCONF },
397 { "LEVEL4_CACHE_ASSOC", _SC_LEVEL4_CACHE_ASSOC, SYSCONF },
398 { "LEVEL4_CACHE_LINESIZE", _SC_LEVEL4_CACHE_LINESIZE, SYSCONF },
399
400 { "IPV6", _SC_IPV6, SYSCONF },
401 { "RAW_SOCKETS", _SC_RAW_SOCKETS, SYSCONF },
402
403 { "_POSIX_IPV6", _SC_IPV6, SYSCONF },
404 { "_POSIX_RAW_SOCKETS", _SC_RAW_SOCKETS, SYSCONF },
405
406 { NULL, 0, SYSCONF }
407 };
408
409
410extern const char *__progname;
411
412
413static void
414usage (void)
415{
416 fprintf (stderr,
417 _("Usage: %s [-v specification] variable_name [pathname]\n"),
418 __progname);
419 fprintf (stderr,
420 _(" %s -a [pathname]\n"), __progname);
421 exit (2);
422}
423
424
425static void
426print_all (const char *path)
427{
428 const struct conf *c;
429 size_t clen;
430 long int value;
431 char *cvalue;
432 for (c = vars; c->name != NULL; ++c) {
433 printf("%-35s", c->name);
434 switch (c->call) {
435 case PATHCONF:
436 value = pathconf (path, c->call_name);
437 if (value != -1) {
438 printf("%ld", value);
439 }
440 printf("\n");
441 break;
442 case SYSCONF:
443 value = sysconf (c->call_name);
444 if (value == -1l) {
445 if (c->call_name == _SC_UINT_MAX
446 || c->call_name == _SC_ULONG_MAX)
447 printf ("%lu", value);
448 }
449 else {
450 printf ("%ld", value);
451 }
452 printf ("\n");
453 break;
454 case CONFSTR:
455 clen = confstr (c->call_name, (char *) NULL, 0);
456 cvalue = (char *) malloc (clen);
457 if (cvalue == NULL)
458 error (3, 0, _("memory exhausted"));
459 if (confstr (c->call_name, cvalue, clen) != clen)
460 error (3, errno, "confstr");
461 printf ("%.*s\n", (int) clen, cvalue);
462 free (cvalue);
463 break;
464 }
465 }
466 exit (0);
467}
468
469int
470main (int argc, char *argv[])
471{
472 const struct conf *c;
473
474 /* Set locale. Do not set LC_ALL because the other categories must
475 not be affected (according to POSIX.2). */
476 setlocale (LC_CTYPE, "");
477 setlocale (LC_MESSAGES, "");
478
479 /* Initialize the message catalog. */
480 textdomain (PACKAGE);
481
482 if (argc > 1 && strcmp (argv[1], "--version") == 0)
483 {
484 printf ("getconf %s%s\n", PKGVERSION, VERSION);
485 printf (gettext ("\
486Copyright (C) %s Free Software Foundation, Inc.\n\
487This is free software; see the source for copying conditions. There is NO\n\
488warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
489"), "2023");
490 printf (gettext ("Written by %s.\n"), "Roland McGrath");
491 return 0;
492 }
493
494 if (argc > 1 && strcmp (argv[1], "--help") == 0)
495 {
496 printf (gettext ("\
497Usage: getconf [-v SPEC] VAR\n\
498 or: getconf [-v SPEC] PATH_VAR PATH\n\
499\n\
500Get the configuration value for variable VAR, or for variable PATH_VAR\n\
501for path PATH. If SPEC is given, give values for compilation\n\
502environment SPEC.\n\n"));
503 printf (gettext ("For bug reporting instructions, please see:\n\
504%s.\n"), REPORT_BUGS_TO);
505 return 0;
506 }
507
508#ifdef ALL_ENVIRONMENTS_DEFINED
509 if (argc > 1 && strncmp (argv[1], "-v", 2) == 0)
510 {
511 if (argv[1][2] == '\0')
512 {
513 if (argc < 3)
514 usage ();
515
516 argv += 2;
517 argc -= 2;
518 }
519 else
520 {
521 argv += 1;
522 argc -= 1;
523 }
524 }
525#else
526 const char *getconf_dir = getenv ("GETCONF_DIR") ?: GETCONF_DIR;
527 size_t getconf_dirlen = strlen (getconf_dir);
528
529 const char *spec = NULL;
530 char buf[sizeof "POSIX_V6_LPBIG_OFFBIG"];
531 char *argv0 = argv[0];
532 if (argc > 1 && strncmp (argv[1], "-v", 2) == 0)
533 {
534 if (argv[1][2] == '\0')
535 {
536 if (argc < 3)
537 usage ();
538
539 spec = argv[2];
540 argv += 2;
541 argc -= 2;
542 }
543 else
544 {
545 spec = &argv[1][2];
546 argv += 1;
547 argc -= 1;
548 }
549 }
550 else
551 {
552 char default_name[getconf_dirlen + sizeof "/default"];
553 memcpy (mempcpy (default_name, getconf_dir, getconf_dirlen),
554 "/default", sizeof "/default");
555 int len = readlink (default_name, buf, sizeof buf - 1);
556 if (len > 0)
557 {
558 buf[len] = '\0';
559 spec = buf;
560 }
561 }
562
563 /* Check for the specifications we know. */
564 if (spec != NULL)
565 {
566 size_t i;
567 for (i = 0; i < nspecs; ++i)
568 if (strcmp (spec, specs[i].name) == 0)
569 break;
570
571 if (i == nspecs)
572 error (2, 0, _("unknown specification \"%s\""), spec);
573
574 switch (specs[i].num)
575 {
576# ifndef _XBS5_ILP32_OFF32
577 case _SC_XBS5_ILP32_OFF32:
578# endif
579# ifndef _XBS5_ILP32_OFFBIG
580 case _SC_XBS5_ILP32_OFFBIG:
581# endif
582# ifndef _XBS5_LP64_OFF64
583 case _SC_XBS5_LP64_OFF64:
584# endif
585# ifndef _XBS5_LPBIG_OFFBIG
586 case _SC_XBS5_LPBIG_OFFBIG:
587# endif
588# ifndef _POSIX_V6_ILP32_OFF32
589 case _SC_V6_ILP32_OFF32:
590# endif
591# ifndef _POSIX_V6_ILP32_OFFBIG
592 case _SC_V6_ILP32_OFFBIG:
593# endif
594# ifndef _POSIX_V6_LP64_OFF64
595 case _SC_V6_LP64_OFF64:
596# endif
597# ifndef _POSIX_V6_LPBIG_OFFBIG
598 case _SC_V6_LPBIG_OFFBIG:
599# endif
600# ifndef _POSIX_V7_ILP32_OFF32
601 case _SC_V7_ILP32_OFF32:
602# endif
603# ifndef _POSIX_V7_ILP32_OFFBIG
604 case _SC_V7_ILP32_OFFBIG:
605# endif
606# ifndef _POSIX_V7_LP64_OFF64
607 case _SC_V7_LP64_OFF64:
608# endif
609# ifndef _POSIX_V7_LPBIG_OFFBIG
610 case _SC_V7_LPBIG_OFFBIG:
611# endif
612 {
613 const char *args[argc + 3];
614 size_t spec_len = strlen (spec);
615 char getconf_name[getconf_dirlen + 1 + spec_len + 1];
616 memcpy (mempcpy (mempcpy (getconf_name, getconf_dir,
617 getconf_dirlen),
618 "/", 1), spec, spec_len + 1);
619 args[0] = argv0;
620 args[1] = "-v";
621 args[2] = spec;
622 memcpy (&args[3], &argv[1], argc * sizeof (argv[1]));
623 execv (getconf_name, (char * const *) args);
624 error (4, errno, _("Couldn't execute %s"), getconf_name);
625 }
626 default:
627 break;
628 }
629 }
630#endif
631
632 if (argc > 1 && strcmp (argv[1], "-a") == 0)
633 {
634 if (argc == 2)
635 print_all ("/");
636 else if (argc == 3)
637 print_all (argv[2]);
638 else
639 usage ();
640 }
641
642 int ai = 1;
643 if (argc > ai && strcmp (argv[ai], "--") == 0)
644 ++ai;
645
646 if (argc - ai < 1 || argc - ai > 2)
647 usage ();
648
649 for (c = vars; c->name != NULL; ++c)
650 if (strcmp (c->name, argv[ai]) == 0
651 || (strncmp (c->name, "_POSIX_", 7) == 0
652 && strcmp (c->name + 7, argv[ai]) == 0))
653 {
654 long int value;
655 size_t clen;
656 char *cvalue;
657 switch (c->call)
658 {
659 case PATHCONF:
660 if (argc - ai < 2)
661 usage ();
662 errno = 0;
663 value = pathconf (argv[ai + 1], c->call_name);
664 if (value == -1)
665 {
666 if (errno)
667 error (3, errno, "pathconf: %s", argv[ai + 1]);
668 else
669 puts (_("undefined"));
670 }
671 else
672 printf ("%ld\n", value);
673 exit (0);
674
675 case SYSCONF:
676 if (argc - ai > 1)
677 usage ();
678 value = sysconf (c->call_name);
679 if (value == -1l)
680 {
681 if (c->call_name == _SC_UINT_MAX
682 || c->call_name == _SC_ULONG_MAX)
683 printf ("%lu\n", value);
684 else
685 puts (_("undefined"));
686 }
687 else
688 printf ("%ld\n", value);
689 exit (0);
690
691 case CONFSTR:
692 if (argc - ai > 1)
693 usage ();
694 clen = confstr (c->call_name, (char *) NULL, 0);
695 cvalue = (char *) malloc (clen);
696 if (cvalue == NULL)
697 error (3, 0, _("memory exhausted"));
698
699 if (confstr (c->call_name, cvalue, clen) != clen)
700 error (3, errno, "confstr");
701
702 printf ("%.*s\n", (int) clen, cvalue);
703 exit (0);
704 }
705 }
706
707 error (2, 0, _("Unrecognized variable `%s'"), argv[ai]);
708 /* NOTREACHED */
709 return 2;
710}
711