Line data Source code
1 : /* Checking macros for unistd functions.
2 : Copyright (C) 2005-2022 Free Software Foundation, Inc.
3 : This file is part of the GNU C Library.
4 :
5 : The GNU C Library is free software; you can redistribute it and/or
6 : modify it under the terms of the GNU Lesser General Public
7 : License as published by the Free Software Foundation; either
8 : version 2.1 of the License, or (at your option) any later version.
9 :
10 : The GNU C Library is distributed in the hope that it will be useful,
11 : but WITHOUT ANY WARRANTY; without even the implied warranty of
12 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 : Lesser General Public License for more details.
14 :
15 : You should have received a copy of the GNU Lesser General Public
16 : License along with the GNU C Library; if not, see
17 : <https://www.gnu.org/licenses/>. */
18 :
19 : #ifndef _UNISTD_H
20 : # error "Never include <bits/unistd.h> directly; use <unistd.h> instead."
21 : #endif
22 :
23 : extern ssize_t __read_chk (int __fd, void *__buf, size_t __nbytes,
24 : size_t __buflen)
25 : __wur __attr_access ((__write_only__, 2, 3));
26 : extern ssize_t __REDIRECT (__read_alias, (int __fd, void *__buf,
27 : size_t __nbytes), read)
28 : __wur __attr_access ((__write_only__, 2, 3));
29 : extern ssize_t __REDIRECT (__read_chk_warn,
30 : (int __fd, void *__buf, size_t __nbytes,
31 : size_t __buflen), __read_chk)
32 : __wur __warnattr ("read called with bigger length than size of "
33 : "the destination buffer");
34 :
35 : __fortify_function __wur ssize_t
36 30408449 : read (int __fd, void *__buf, size_t __nbytes)
37 : {
38 15154411 : return __glibc_fortify (read, __nbytes, sizeof (char),
39 : __glibc_objsize0 (__buf),
40 : __fd, __buf, __nbytes);
41 : }
42 :
43 : #if defined __USE_UNIX98 || defined __USE_XOPEN2K8
44 : extern ssize_t __pread_chk (int __fd, void *__buf, size_t __nbytes,
45 : __off_t __offset, size_t __bufsize)
46 : __wur __attr_access ((__write_only__, 2, 3));
47 : extern ssize_t __pread64_chk (int __fd, void *__buf, size_t __nbytes,
48 : __off64_t __offset, size_t __bufsize)
49 : __wur __attr_access ((__write_only__, 2, 3));
50 : extern ssize_t __REDIRECT (__pread_alias,
51 : (int __fd, void *__buf, size_t __nbytes,
52 : __off_t __offset), pread)
53 : __wur __attr_access ((__write_only__, 2, 3));
54 : extern ssize_t __REDIRECT (__pread64_alias,
55 : (int __fd, void *__buf, size_t __nbytes,
56 : __off64_t __offset), pread64)
57 : __wur __attr_access ((__write_only__, 2, 3));
58 : extern ssize_t __REDIRECT (__pread_chk_warn,
59 : (int __fd, void *__buf, size_t __nbytes,
60 : __off_t __offset, size_t __bufsize), __pread_chk)
61 : __wur __warnattr ("pread called with bigger length than size of "
62 : "the destination buffer");
63 : extern ssize_t __REDIRECT (__pread64_chk_warn,
64 : (int __fd, void *__buf, size_t __nbytes,
65 : __off64_t __offset, size_t __bufsize),
66 : __pread64_chk)
67 : __wur __warnattr ("pread64 called with bigger length than size of "
68 : "the destination buffer");
69 :
70 : # ifndef __USE_FILE_OFFSET64
71 : __fortify_function __wur ssize_t
72 17705 : pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset)
73 : {
74 17705 : return __glibc_fortify (pread, __nbytes, sizeof (char),
75 : __glibc_objsize0 (__buf),
76 : __fd, __buf, __nbytes, __offset);
77 : }
78 : # else
79 : __fortify_function __wur ssize_t
80 : pread (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
81 : {
82 : return __glibc_fortify (pread64, __nbytes, sizeof (char),
83 : __glibc_objsize0 (__buf),
84 : __fd, __buf, __nbytes, __offset);
85 : }
86 : # endif
87 :
88 : # ifdef __USE_LARGEFILE64
89 : __fortify_function __wur ssize_t
90 : pread64 (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
91 : {
92 : return __glibc_fortify (pread64, __nbytes, sizeof (char),
93 : __glibc_objsize0 (__buf),
94 : __fd, __buf, __nbytes, __offset);
95 : }
96 : # endif
97 : #endif
98 :
99 : #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
100 : extern ssize_t __readlink_chk (const char *__restrict __path,
101 : char *__restrict __buf, size_t __len,
102 : size_t __buflen)
103 : __THROW __nonnull ((1, 2)) __wur __attr_access ((__write_only__, 2, 3));
104 : extern ssize_t __REDIRECT_NTH (__readlink_alias,
105 : (const char *__restrict __path,
106 : char *__restrict __buf, size_t __len), readlink)
107 : __nonnull ((1, 2)) __wur __attr_access ((__write_only__, 2, 3));
108 : extern ssize_t __REDIRECT_NTH (__readlink_chk_warn,
109 : (const char *__restrict __path,
110 : char *__restrict __buf, size_t __len,
111 : size_t __buflen), __readlink_chk)
112 : __nonnull ((1, 2)) __wur __warnattr ("readlink called with bigger length "
113 : "than size of destination buffer");
114 :
115 : __fortify_function __nonnull ((1, 2)) __wur ssize_t
116 : __NTH (readlink (const char *__restrict __path, char *__restrict __buf,
117 : size_t __len))
118 : {
119 : return __glibc_fortify (readlink, __len, sizeof (char),
120 : __glibc_objsize (__buf),
121 : __path, __buf, __len);
122 : }
123 : #endif
124 :
125 : #ifdef __USE_ATFILE
126 : extern ssize_t __readlinkat_chk (int __fd, const char *__restrict __path,
127 : char *__restrict __buf, size_t __len,
128 : size_t __buflen)
129 : __THROW __nonnull ((2, 3)) __wur __attr_access ((__write_only__, 3, 4));
130 : extern ssize_t __REDIRECT_NTH (__readlinkat_alias,
131 : (int __fd, const char *__restrict __path,
132 : char *__restrict __buf, size_t __len),
133 : readlinkat)
134 : __nonnull ((2, 3)) __wur __attr_access ((__write_only__, 3, 4));
135 : extern ssize_t __REDIRECT_NTH (__readlinkat_chk_warn,
136 : (int __fd, const char *__restrict __path,
137 : char *__restrict __buf, size_t __len,
138 : size_t __buflen), __readlinkat_chk)
139 : __nonnull ((2, 3)) __wur __warnattr ("readlinkat called with bigger "
140 : "length than size of destination "
141 : "buffer");
142 :
143 : __fortify_function __nonnull ((2, 3)) __wur ssize_t
144 0 : __NTH (readlinkat (int __fd, const char *__restrict __path,
145 : char *__restrict __buf, size_t __len))
146 : {
147 0 : return __glibc_fortify (readlinkat, __len, sizeof (char),
148 : __glibc_objsize (__buf),
149 : __fd, __path, __buf, __len);
150 : }
151 : #endif
152 :
153 : extern char *__getcwd_chk (char *__buf, size_t __size, size_t __buflen)
154 : __THROW __wur;
155 : extern char *__REDIRECT_NTH (__getcwd_alias,
156 : (char *__buf, size_t __size), getcwd) __wur;
157 : extern char *__REDIRECT_NTH (__getcwd_chk_warn,
158 : (char *__buf, size_t __size, size_t __buflen),
159 : __getcwd_chk)
160 : __wur __warnattr ("getcwd caller with bigger length than size of "
161 : "destination buffer");
162 :
163 : __fortify_function __wur char *
164 1538 : __NTH (getcwd (char *__buf, size_t __size))
165 : {
166 1538 : return __glibc_fortify (getcwd, __size, sizeof (char),
167 : __glibc_objsize (__buf),
168 : __buf, __size);
169 : }
170 :
171 : #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
172 : extern char *__getwd_chk (char *__buf, size_t buflen)
173 : __THROW __nonnull ((1)) __wur __attr_access ((__write_only__, 1, 2));
174 : extern char *__REDIRECT_NTH (__getwd_warn, (char *__buf), getwd)
175 : __nonnull ((1)) __wur __warnattr ("please use getcwd instead, as getwd "
176 : "doesn't specify buffer size");
177 :
178 : __fortify_function __nonnull ((1)) __attribute_deprecated__ __wur char *
179 : __NTH (getwd (char *__buf))
180 : {
181 : if (__glibc_objsize (__buf) != (size_t) -1)
182 : return __getwd_chk (__buf, __glibc_objsize (__buf));
183 : return __getwd_warn (__buf);
184 : }
185 : #endif
186 :
187 : extern size_t __confstr_chk (int __name, char *__buf, size_t __len,
188 : size_t __buflen) __THROW
189 : __attr_access ((__write_only__, 2, 3));
190 : extern size_t __REDIRECT_NTH (__confstr_alias, (int __name, char *__buf,
191 : size_t __len), confstr)
192 : __attr_access ((__write_only__, 2, 3));
193 : extern size_t __REDIRECT_NTH (__confstr_chk_warn,
194 : (int __name, char *__buf, size_t __len,
195 : size_t __buflen), __confstr_chk)
196 : __warnattr ("confstr called with bigger length than size of destination "
197 : "buffer");
198 :
199 : __fortify_function size_t
200 : __NTH (confstr (int __name, char *__buf, size_t __len))
201 : {
202 : return __glibc_fortify (confstr, __len, sizeof (char),
203 : __glibc_objsize (__buf),
204 : __name, __buf, __len);
205 : }
206 :
207 :
208 : extern int __getgroups_chk (int __size, __gid_t __list[], size_t __listlen)
209 : __THROW __wur __attr_access ((__write_only__, 2, 1));
210 : extern int __REDIRECT_NTH (__getgroups_alias, (int __size, __gid_t __list[]),
211 : getgroups) __wur __attr_access ((__write_only__, 2, 1));
212 : extern int __REDIRECT_NTH (__getgroups_chk_warn,
213 : (int __size, __gid_t __list[], size_t __listlen),
214 : __getgroups_chk)
215 : __wur __warnattr ("getgroups called with bigger group count than what "
216 : "can fit into destination buffer");
217 :
218 : __fortify_function int
219 7608 : __NTH (getgroups (int __size, __gid_t __list[]))
220 : {
221 7608 : return __glibc_fortify (getgroups, __size, sizeof (__gid_t),
222 : __glibc_objsize (__list),
223 : __size, __list);
224 : }
225 :
226 :
227 : extern int __ttyname_r_chk (int __fd, char *__buf, size_t __buflen,
228 : size_t __nreal) __THROW __nonnull ((2))
229 : __attr_access ((__write_only__, 2, 3));
230 : extern int __REDIRECT_NTH (__ttyname_r_alias, (int __fd, char *__buf,
231 : size_t __buflen), ttyname_r)
232 : __nonnull ((2));
233 : extern int __REDIRECT_NTH (__ttyname_r_chk_warn,
234 : (int __fd, char *__buf, size_t __buflen,
235 : size_t __nreal), __ttyname_r_chk)
236 : __nonnull ((2)) __warnattr ("ttyname_r called with bigger buflen than "
237 : "size of destination buffer");
238 :
239 : __fortify_function int
240 : __NTH (ttyname_r (int __fd, char *__buf, size_t __buflen))
241 : {
242 : return __glibc_fortify (ttyname_r, __buflen, sizeof (char),
243 : __glibc_objsize (__buf),
244 : __fd, __buf, __buflen);
245 : }
246 :
247 :
248 : #ifdef __USE_POSIX199506
249 : extern int __getlogin_r_chk (char *__buf, size_t __buflen, size_t __nreal)
250 : __nonnull ((1)) __attr_access ((__write_only__, 1, 2));
251 : extern int __REDIRECT (__getlogin_r_alias, (char *__buf, size_t __buflen),
252 : getlogin_r) __nonnull ((1));
253 : extern int __REDIRECT (__getlogin_r_chk_warn,
254 : (char *__buf, size_t __buflen, size_t __nreal),
255 : __getlogin_r_chk)
256 : __nonnull ((1)) __warnattr ("getlogin_r called with bigger buflen than "
257 : "size of destination buffer");
258 :
259 : __fortify_function int
260 : getlogin_r (char *__buf, size_t __buflen)
261 : {
262 : return __glibc_fortify (getlogin_r, __buflen, sizeof (char),
263 : __glibc_objsize (__buf),
264 : __buf, __buflen);
265 : }
266 : #endif
267 :
268 :
269 : #if defined __USE_MISC || defined __USE_UNIX98
270 : extern int __gethostname_chk (char *__buf, size_t __buflen, size_t __nreal)
271 : __THROW __nonnull ((1)) __attr_access ((__write_only__, 1, 2));
272 : extern int __REDIRECT_NTH (__gethostname_alias, (char *__buf, size_t __buflen),
273 : gethostname)
274 : __nonnull ((1)) __attr_access ((__write_only__, 1, 2));
275 : extern int __REDIRECT_NTH (__gethostname_chk_warn,
276 : (char *__buf, size_t __buflen, size_t __nreal),
277 : __gethostname_chk)
278 : __nonnull ((1)) __warnattr ("gethostname called with bigger buflen than "
279 : "size of destination buffer");
280 :
281 : __fortify_function int
282 3304 : __NTH (gethostname (char *__buf, size_t __buflen))
283 : {
284 1421 : return __glibc_fortify (gethostname, __buflen, sizeof (char),
285 : __glibc_objsize (__buf),
286 : __buf, __buflen);
287 : }
288 : #endif
289 :
290 :
291 : #if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_UNIX98)
292 : extern int __getdomainname_chk (char *__buf, size_t __buflen, size_t __nreal)
293 : __THROW __nonnull ((1)) __wur __attr_access ((__write_only__, 1, 2));
294 : extern int __REDIRECT_NTH (__getdomainname_alias, (char *__buf,
295 : size_t __buflen),
296 : getdomainname) __nonnull ((1))
297 : __wur __attr_access ((__write_only__, 1, 2));
298 : extern int __REDIRECT_NTH (__getdomainname_chk_warn,
299 : (char *__buf, size_t __buflen, size_t __nreal),
300 : __getdomainname_chk)
301 : __nonnull ((1)) __wur __warnattr ("getdomainname called with bigger "
302 : "buflen than size of destination "
303 : "buffer");
304 :
305 : __fortify_function int
306 0 : __NTH (getdomainname (char *__buf, size_t __buflen))
307 : {
308 0 : return __glibc_fortify (getdomainname, __buflen, sizeof (char),
309 : __glibc_objsize (__buf),
310 : __buf, __buflen);
311 : }
312 : #endif
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