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- /* Checking macros for unistd functions.
- Copyright (C) 2005-2026 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library 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
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <https://www.gnu.org/licenses/>. */
- #ifndef _UNISTD_H
- # error "Never include <bits/unistd.h> directly; use <unistd.h> instead."
- #endif
- # include <bits/unistd-decl.h>
- __fortify_function __attribute_overloadable__ __wur ssize_t
- read (int __fd, __fortify_clang_overload_arg0 (void *, ,__buf), size_t __nbytes)
- __fortify_clang_warning_only_if_bos0_lt (__nbytes, __buf,
- "read called with bigger length than "
- "size of the destination buffer")
- {
- return __glibc_fortify (read, __nbytes, sizeof (char),
- __glibc_objsize0 (__buf),
- __fd, __buf, __nbytes);
- }
- #if defined __USE_UNIX98 || defined __USE_XOPEN2K8
- # ifndef __USE_FILE_OFFSET64
- __fortify_function __attribute_overloadable__ __wur ssize_t
- pread (int __fd, __fortify_clang_overload_arg0 (void *, ,__buf),
- size_t __nbytes, __off_t __offset)
- __fortify_clang_warning_only_if_bos0_lt (__nbytes, __buf,
- "pread called with bigger length than "
- "size of the destination buffer")
- {
- return __glibc_fortify (pread, __nbytes, sizeof (char),
- __glibc_objsize0 (__buf),
- __fd, __buf, __nbytes, __offset);
- }
- # else
- __fortify_function __attribute_overloadable__ __wur ssize_t
- pread (int __fd, __fortify_clang_overload_arg0 (void *, ,__buf),
- size_t __nbytes, __off64_t __offset)
- __fortify_clang_warning_only_if_bos0_lt (__nbytes, __buf,
- "pread called with bigger length than "
- "size of the destination buffer")
- {
- return __glibc_fortify (pread64, __nbytes, sizeof (char),
- __glibc_objsize0 (__buf),
- __fd, __buf, __nbytes, __offset);
- }
- # endif
- # ifdef __USE_LARGEFILE64
- __fortify_function __attribute_overloadable__ __wur ssize_t
- pread64 (int __fd, __fortify_clang_overload_arg0 (void *, ,__buf),
- size_t __nbytes, __off64_t __offset)
- __fortify_clang_warning_only_if_bos0_lt (__nbytes, __buf,
- "pread64 called with bigger length than "
- "size of the destination buffer")
- {
- return __glibc_fortify (pread64, __nbytes, sizeof (char),
- __glibc_objsize0 (__buf),
- __fd, __buf, __nbytes, __offset);
- }
- # endif
- #endif
- #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
- __fortify_function __attribute_overloadable__ __nonnull ((1, 2)) __wur ssize_t
- __NTH (readlink (const char *__restrict __path,
- __fortify_clang_overload_arg0 (char *, __restrict, __buf),
- size_t __len))
- __fortify_clang_warning_only_if_bos_lt (__len, __buf,
- "readlink called with bigger length "
- "than size of destination buffer")
- {
- return __glibc_fortify (readlink, __len, sizeof (char),
- __glibc_objsize (__buf),
- __path, __buf, __len);
- }
- #endif
- #ifdef __USE_ATFILE
- __fortify_function __attribute_overloadable__ __nonnull ((2, 3)) __wur ssize_t
- __NTH (readlinkat (int __fd, const char *__restrict __path,
- __fortify_clang_overload_arg0 (char *, __restrict, __buf),
- size_t __len))
- __fortify_clang_warning_only_if_bos_lt (__len, __buf,
- "readlinkat called with bigger length "
- "than size of destination buffer")
- {
- return __glibc_fortify (readlinkat, __len, sizeof (char),
- __glibc_objsize (__buf),
- __fd, __path, __buf, __len);
- }
- #endif
- __fortify_function __attribute_overloadable__ __wur char *
- __NTH (getcwd (__fortify_clang_overload_arg (char *, , __buf), size_t __size))
- __fortify_clang_warning_only_if_bos_lt (__size, __buf,
- "getcwd called with bigger length "
- "than size of destination buffer")
- {
- return __glibc_fortify (getcwd, __size, sizeof (char),
- __glibc_objsize (__buf),
- __buf, __size);
- }
- #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
- __fortify_function __attribute_overloadable__ __nonnull ((1))
- __attribute_deprecated__ __wur char *
- __NTH (getwd (__fortify_clang_overload_arg (char *,, __buf)))
- {
- if (__glibc_objsize (__buf) != (size_t) -1)
- return __getwd_chk (__buf, __glibc_objsize (__buf));
- return __getwd_warn (__buf);
- }
- #endif
- __fortify_function __attribute_overloadable__ size_t
- __NTH (confstr (int __name, __fortify_clang_overload_arg (char *, ,__buf),
- size_t __len))
- __fortify_clang_warning_only_if_bos_lt (__len, __buf,
- "confstr called with bigger length than "
- "size of destination buffer")
- {
- return __glibc_fortify (confstr, __len, sizeof (char),
- __glibc_objsize (__buf),
- __name, __buf, __len);
- }
- __fortify_function __attribute_overloadable__ int
- __NTH (getgroups (int __size,
- __fortify_clang_overload_arg (__gid_t *, , __list)))
- __fortify_clang_warning_only_if_bos_lt (__size * sizeof (__gid_t), __list,
- "getgroups called with bigger group "
- "count than what can fit into "
- "destination buffer")
- {
- return __glibc_fortify (getgroups, __size, sizeof (__gid_t),
- __glibc_objsize (__list),
- __size, __list);
- }
- __fortify_function __attribute_overloadable__ int
- __NTH (ttyname_r (int __fd,
- __fortify_clang_overload_arg (char *, ,__buf),
- size_t __buflen))
- __fortify_clang_warning_only_if_bos_lt (__buflen, __buf,
- "ttyname_r called with bigger buflen "
- "than size of destination buffer")
- {
- return __glibc_fortify (ttyname_r, __buflen, sizeof (char),
- __glibc_objsize (__buf),
- __fd, __buf, __buflen);
- }
- #ifdef __USE_POSIX199506
- __fortify_function __attribute_overloadable__ int
- getlogin_r (__fortify_clang_overload_arg (char *, ,__buf), size_t __buflen)
- __fortify_clang_warning_only_if_bos_lt (__buflen, __buf,
- "getlogin_r called with bigger buflen "
- "than size of destination buffer")
- {
- return __glibc_fortify (getlogin_r, __buflen, sizeof (char),
- __glibc_objsize (__buf),
- __buf, __buflen);
- }
- #endif
- #if defined __USE_MISC || defined __USE_UNIX98
- __fortify_function __attribute_overloadable__ int
- __NTH (gethostname (__fortify_clang_overload_arg (char *, ,__buf),
- size_t __buflen))
- __fortify_clang_warning_only_if_bos_lt (__buflen, __buf,
- "gethostname called with bigger buflen "
- "than size of destination buffer")
- {
- return __glibc_fortify (gethostname, __buflen, sizeof (char),
- __glibc_objsize (__buf),
- __buf, __buflen);
- }
- #endif
- #if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_UNIX98)
- __fortify_function __attribute_overloadable__ int
- __NTH (getdomainname (__fortify_clang_overload_arg (char *, ,__buf),
- size_t __buflen))
- __fortify_clang_warning_only_if_bos_lt (__buflen, __buf,
- "getdomainname called with bigger "
- "buflen than size of destination buffer")
- {
- return __glibc_fortify (getdomainname, __buflen, sizeof (char),
- __glibc_objsize (__buf),
- __buf, __buflen);
- }
- #endif
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