[13/21] posix/bits/unistd.h: Clearly separate declaration from definitions

  This change is similar to what was done for bits/wchar2.h.
Routines declaration are moved into a dedicated bits/unistd-decl.h file
which is then included into the bits/unistd.h file.

This will allow to adapt the files so that PLT entries are not created when
_FORTIFY_SOURCE is enabled.
---
 include/bits/unistd-decl.h |   1 +
 include/unistd.h           |   1 +
 posix/Makefile             |   1 +
 posix/bits/unistd-decl.h   | 198 +++++++++++++++++++++++++++++++++++++
 posix/bits/unistd.h        | 154 +----------------------------
 5 files changed, 202 insertions(+), 153 deletions(-)
 create mode 100644 include/bits/unistd-decl.h
 create mode 100644 posix/bits/unistd-decl.h
  

On 2023-06-20 14:19, Frédéric Bérat wrote:
> This change is similar to what was done for bits/wchar2.h.
> Routines declaration are moved into a dedicated bits/unistd-decl.h file
> which is then included into the bits/unistd.h file.
> 
> This will allow to adapt the files so that PLT entries are not created when
> _FORTIFY_SOURCE is enabled.
> ---
>   include/bits/unistd-decl.h |   1 +
>   include/unistd.h           |   1 +
>   posix/Makefile             |   1 +
>   posix/bits/unistd-decl.h   | 198 +++++++++++++++++++++++++++++++++++++
>   posix/bits/unistd.h        | 154 +----------------------------
>   5 files changed, 202 insertions(+), 153 deletions(-)
>   create mode 100644 include/bits/unistd-decl.h
>   create mode 100644 posix/bits/unistd-decl.h
> 
> diff --git a/include/bits/unistd-decl.h b/include/bits/unistd-decl.h
> new file mode 100644
> index 0000000000..7fcbd272ac
> --- /dev/null
> +++ b/include/bits/unistd-decl.h
> @@ -0,0 +1 @@
> +#include <posix/bits/unistd-decl.h>
> diff --git a/include/unistd.h b/include/unistd.h
> index 4345d08d60..b042a485f9 100644
> --- a/include/unistd.h
> +++ b/include/unistd.h
> @@ -5,6 +5,7 @@
>   
>   #  include <stdbool.h>
>   #  include <kernel-features.h>
> +#  include <bits/unistd-decl.h>
>   
>   libc_hidden_proto (_exit, __noreturn__)
>   #  ifndef NO_RTLD_HIDDEN
> diff --git a/posix/Makefile b/posix/Makefile
> index 5113ee3b74..3d368b91f6 100644
> --- a/posix/Makefile
> +++ b/posix/Makefile
> @@ -42,6 +42,7 @@ headers := \
>     bits/types/idtype_t.h \
>     bits/types/struct_sched_param.h \
>     bits/typesizes.h \
> +  bits/unistd-decl.h \
>     bits/unistd.h \
>     bits/unistd_ext.h \
>     bits/utsname.h \
> diff --git a/posix/bits/unistd-decl.h b/posix/bits/unistd-decl.h
> new file mode 100644
> index 0000000000..440911b20a
> --- /dev/null
> +++ b/posix/bits/unistd-decl.h
> @@ -0,0 +1,198 @@
> +/* Checking routines for unistd functions. Declaration only.
> +   Copyright (C) 2023 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 _BITS_UNISTD_DECL_H
> +#define _BITS_UNISTD_DECL_H 1
> +
> +#ifndef _UNISTD_H
> +# error "Never include <bits/unistd.h> directly; use <unistd.h> instead."

Never use unistd-decl.h...

> +#endif
> +
> +extern ssize_t __read_chk (int __fd, void *__buf, size_t __nbytes,
> +			   size_t __buflen)
> +     __wur __attr_access ((__write_only__, 2, 3));
> +extern ssize_t __REDIRECT (__read_alias, (int __fd, void *__buf,
> +						  size_t __nbytes), read)
> +     __wur __attr_access ((__write_only__, 2, 3));
> +extern ssize_t __REDIRECT (__read_chk_warn,
> +			   (int __fd, void *__buf, size_t __nbytes,
> +			    size_t __buflen), __read_chk)
> +     __wur __warnattr ("read called with bigger length than size of "
> +		       "the destination buffer");
> +
> +#if defined __USE_UNIX98 || defined __USE_XOPEN2K8
> +extern ssize_t __pread_chk (int __fd, void *__buf, size_t __nbytes,
> +			    __off_t __offset, size_t __bufsize)
> +     __wur __attr_access ((__write_only__, 2, 3));
> +extern ssize_t __pread64_chk (int __fd, void *__buf, size_t __nbytes,
> +			      __off64_t __offset, size_t __bufsize)
> +     __wur __attr_access ((__write_only__, 2, 3));
> +extern ssize_t __REDIRECT (__pread_alias,
> +			   (int __fd, void *__buf, size_t __nbytes,
> +			    __off_t __offset), pread)
> +     __wur __attr_access ((__write_only__, 2, 3));
> +extern ssize_t __REDIRECT (__pread64_alias,
> +			   (int __fd, void *__buf, size_t __nbytes,
> +			    __off64_t __offset), pread64)
> +     __wur __attr_access ((__write_only__, 2, 3));
> +extern ssize_t __REDIRECT (__pread_chk_warn,
> +			   (int __fd, void *__buf, size_t __nbytes,
> +			    __off_t __offset, size_t __bufsize), __pread_chk)
> +     __wur __warnattr ("pread called with bigger length than size of "
> +		       "the destination buffer");
> +extern ssize_t __REDIRECT (__pread64_chk_warn,
> +			   (int __fd, void *__buf, size_t __nbytes,
> +			    __off64_t __offset, size_t __bufsize),
> +			    __pread64_chk)
> +     __wur __warnattr ("pread64 called with bigger length than size of "
> +		       "the destination buffer");
> +#endif
> +
> +#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
> +extern ssize_t __readlink_chk (const char *__restrict __path,
> +			       char *__restrict __buf, size_t __len,
> +			       size_t __buflen)
> +     __THROW __nonnull ((1, 2)) __wur __attr_access ((__write_only__, 2, 3));
> +extern ssize_t __REDIRECT_NTH (__readlink_alias,
> +			       (const char *__restrict __path,
> +				char *__restrict __buf, size_t __len), readlink)
> +     __nonnull ((1, 2)) __wur __attr_access ((__write_only__, 2, 3));
> +extern ssize_t __REDIRECT_NTH (__readlink_chk_warn,
> +			       (const char *__restrict __path,
> +				char *__restrict __buf, size_t __len,
> +				size_t __buflen), __readlink_chk)
> +     __nonnull ((1, 2)) __wur __warnattr ("readlink called with bigger length "
> +					  "than size of destination buffer");
> +#endif
> +
> +#ifdef __USE_ATFILE
> +extern ssize_t __readlinkat_chk (int __fd, const char *__restrict __path,
> +				 char *__restrict __buf, size_t __len,
> +				 size_t __buflen)
> +     __THROW __nonnull ((2, 3)) __wur __attr_access ((__write_only__, 3, 4));
> +extern ssize_t __REDIRECT_NTH (__readlinkat_alias,
> +			       (int __fd, const char *__restrict __path,
> +				char *__restrict __buf, size_t __len),
> +			       readlinkat)
> +     __nonnull ((2, 3)) __wur __attr_access ((__write_only__, 3, 4));
> +extern ssize_t __REDIRECT_NTH (__readlinkat_chk_warn,
> +			       (int __fd, const char *__restrict __path,
> +				char *__restrict __buf, size_t __len,
> +				size_t __buflen), __readlinkat_chk)
> +     __nonnull ((2, 3)) __wur __warnattr ("readlinkat called with bigger "
> +					  "length than size of destination "
> +					  "buffer");
> +#endif
> +
> +extern char *__getcwd_chk (char *__buf, size_t __size, size_t __buflen)
> +     __THROW __wur;
> +extern char *__REDIRECT_NTH (__getcwd_alias,
> +			     (char *__buf, size_t __size), getcwd) __wur;
> +extern char *__REDIRECT_NTH (__getcwd_chk_warn,
> +			     (char *__buf, size_t __size, size_t __buflen),
> +			     __getcwd_chk)
> +     __wur __warnattr ("getcwd caller with bigger length than size of "
> +		       "destination buffer");
> +
> +#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
> +extern char *__getwd_chk (char *__buf, size_t buflen)
> +     __THROW __nonnull ((1)) __wur __attr_access ((__write_only__, 1, 2));
> +extern char *__REDIRECT_NTH (__getwd_warn, (char *__buf), getwd)
> +     __nonnull ((1)) __wur __warnattr ("please use getcwd instead, as getwd "
> +				       "doesn't specify buffer size");
> +#endif
> +
> +extern size_t __confstr_chk (int __name, char *__buf, size_t __len,
> +			     size_t __buflen) __THROW
> +     __attr_access ((__write_only__, 2, 3));
> +extern size_t __REDIRECT_NTH (__confstr_alias, (int __name, char *__buf,
> +						size_t __len), confstr)
> +     __attr_access ((__write_only__, 2, 3));
> +extern size_t __REDIRECT_NTH (__confstr_chk_warn,
> +			      (int __name, char *__buf, size_t __len,
> +			       size_t __buflen), __confstr_chk)
> +     __warnattr ("confstr called with bigger length than size of destination "
> +		 "buffer");
> +
> +
> +extern int __getgroups_chk (int __size, __gid_t __list[], size_t __listlen)
> +     __THROW __wur __attr_access ((__write_only__, 2, 1));
> +extern int __REDIRECT_NTH (__getgroups_alias, (int __size, __gid_t __list[]),
> +			   getgroups) __wur __attr_access ((__write_only__, 2, 1));
> +extern int __REDIRECT_NTH (__getgroups_chk_warn,
> +			   (int __size, __gid_t __list[], size_t __listlen),
> +			   __getgroups_chk)
> +     __wur __warnattr ("getgroups called with bigger group count than what "
> +		       "can fit into destination buffer");
> +
> +
> +extern int __ttyname_r_chk (int __fd, char *__buf, size_t __buflen,
> +			    size_t __nreal) __THROW __nonnull ((2))
> +     __attr_access ((__write_only__, 2, 3));
> +extern int __REDIRECT_NTH (__ttyname_r_alias, (int __fd, char *__buf,
> +					       size_t __buflen), ttyname_r)
> +     __nonnull ((2));
> +extern int __REDIRECT_NTH (__ttyname_r_chk_warn,
> +			   (int __fd, char *__buf, size_t __buflen,
> +			    size_t __nreal), __ttyname_r_chk)
> +     __nonnull ((2)) __warnattr ("ttyname_r called with bigger buflen than "
> +				 "size of destination buffer");
> +
> +
> +#ifdef __USE_POSIX199506
> +extern int __getlogin_r_chk (char *__buf, size_t __buflen, size_t __nreal)
> +     __nonnull ((1)) __attr_access ((__write_only__, 1, 2));
> +extern int __REDIRECT (__getlogin_r_alias, (char *__buf, size_t __buflen),
> +		       getlogin_r) __nonnull ((1));
> +extern int __REDIRECT (__getlogin_r_chk_warn,
> +		       (char *__buf, size_t __buflen, size_t __nreal),
> +		       __getlogin_r_chk)
> +     __nonnull ((1)) __warnattr ("getlogin_r called with bigger buflen than "
> +				 "size of destination buffer");
> +#endif
> +
> +
> +#if defined __USE_MISC || defined __USE_UNIX98
> +extern int __gethostname_chk (char *__buf, size_t __buflen, size_t __nreal)
> +     __THROW __nonnull ((1)) __attr_access ((__write_only__, 1, 2));
> +extern int __REDIRECT_NTH (__gethostname_alias, (char *__buf, size_t __buflen),
> +			   gethostname)
> +     __nonnull ((1)) __attr_access ((__write_only__, 1, 2));
> +extern int __REDIRECT_NTH (__gethostname_chk_warn,
> +			   (char *__buf, size_t __buflen, size_t __nreal),
> +			   __gethostname_chk)
> +     __nonnull ((1)) __warnattr ("gethostname called with bigger buflen than "
> +				 "size of destination buffer");
> +#endif
> +
> +
> +#if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_UNIX98)
> +extern int __getdomainname_chk (char *__buf, size_t __buflen, size_t __nreal)
> +     __THROW __nonnull ((1)) __wur __attr_access ((__write_only__, 1, 2));
> +extern int __REDIRECT_NTH (__getdomainname_alias, (char *__buf,
> +						   size_t __buflen),
> +			   getdomainname) __nonnull ((1))
> +     __wur __attr_access ((__write_only__, 1, 2));
> +extern int __REDIRECT_NTH (__getdomainname_chk_warn,
> +			   (char *__buf, size_t __buflen, size_t __nreal),
> +			   __getdomainname_chk)
> +     __nonnull ((1)) __wur __warnattr ("getdomainname called with bigger "
> +				       "buflen than size of destination "
> +				       "buffer");
> +#endif
> +#endif /* bits/unistd-decl.h.  */
> diff --git a/posix/bits/unistd.h b/posix/bits/unistd.h
> index 2a0782e6c8..6a381116a9 100644
> --- a/posix/bits/unistd.h
> +++ b/posix/bits/unistd.h
> @@ -20,17 +20,7 @@
>   # error "Never include <bits/unistd.h> directly; use <unistd.h> instead."
>   #endif
>   
> -extern ssize_t __read_chk (int __fd, void *__buf, size_t __nbytes,
> -			   size_t __buflen)
> -  __wur __attr_access ((__write_only__, 2, 3));
> -extern ssize_t __REDIRECT (__read_alias, (int __fd, void *__buf,
> -					  size_t __nbytes), read)
> -  __wur __attr_access ((__write_only__, 2, 3));
> -extern ssize_t __REDIRECT (__read_chk_warn,
> -			   (int __fd, void *__buf, size_t __nbytes,
> -			    size_t __buflen), __read_chk)
> -     __wur __warnattr ("read called with bigger length than size of "
> -		       "the destination buffer");
> +# include <bits/unistd-decl.h>
>   
>   __fortify_function __wur ssize_t
>   read (int __fd, void *__buf, size_t __nbytes)
> @@ -41,32 +31,6 @@ read (int __fd, void *__buf, size_t __nbytes)
>   }
>   
>   #if defined __USE_UNIX98 || defined __USE_XOPEN2K8
> -extern ssize_t __pread_chk (int __fd, void *__buf, size_t __nbytes,
> -			    __off_t __offset, size_t __bufsize)
> -  __wur __attr_access ((__write_only__, 2, 3));
> -extern ssize_t __pread64_chk (int __fd, void *__buf, size_t __nbytes,
> -			      __off64_t __offset, size_t __bufsize)
> -  __wur __attr_access ((__write_only__, 2, 3));
> -extern ssize_t __REDIRECT (__pread_alias,
> -			   (int __fd, void *__buf, size_t __nbytes,
> -			    __off_t __offset), pread)
> -  __wur __attr_access ((__write_only__, 2, 3));
> -extern ssize_t __REDIRECT (__pread64_alias,
> -			   (int __fd, void *__buf, size_t __nbytes,
> -			    __off64_t __offset), pread64)
> -  __wur __attr_access ((__write_only__, 2, 3));
> -extern ssize_t __REDIRECT (__pread_chk_warn,
> -			   (int __fd, void *__buf, size_t __nbytes,
> -			    __off_t __offset, size_t __bufsize), __pread_chk)
> -     __wur __warnattr ("pread called with bigger length than size of "
> -		       "the destination buffer");
> -extern ssize_t __REDIRECT (__pread64_chk_warn,
> -			   (int __fd, void *__buf, size_t __nbytes,
> -			    __off64_t __offset, size_t __bufsize),
> -			    __pread64_chk)
> -     __wur __warnattr ("pread64 called with bigger length than size of "
> -		       "the destination buffer");
> -
>   # ifndef __USE_FILE_OFFSET64
>   __fortify_function __wur ssize_t
>   pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset)
> @@ -97,21 +61,6 @@ pread64 (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
>   #endif
>   
>   #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
> -extern ssize_t __readlink_chk (const char *__restrict __path,
> -			       char *__restrict __buf, size_t __len,
> -			       size_t __buflen)
> -     __THROW __nonnull ((1, 2)) __wur __attr_access ((__write_only__, 2, 3));
> -extern ssize_t __REDIRECT_NTH (__readlink_alias,
> -			       (const char *__restrict __path,
> -				char *__restrict __buf, size_t __len), readlink)
> -     __nonnull ((1, 2)) __wur __attr_access ((__write_only__, 2, 3));
> -extern ssize_t __REDIRECT_NTH (__readlink_chk_warn,
> -			       (const char *__restrict __path,
> -				char *__restrict __buf, size_t __len,
> -				size_t __buflen), __readlink_chk)
> -     __nonnull ((1, 2)) __wur __warnattr ("readlink called with bigger length "
> -					  "than size of destination buffer");
> -
>   __fortify_function __nonnull ((1, 2)) __wur ssize_t
>   __NTH (readlink (const char *__restrict __path, char *__restrict __buf,
>   		 size_t __len))
> @@ -123,23 +72,6 @@ __NTH (readlink (const char *__restrict __path, char *__restrict __buf,
>   #endif
>   
>   #ifdef __USE_ATFILE
> -extern ssize_t __readlinkat_chk (int __fd, const char *__restrict __path,
> -				 char *__restrict __buf, size_t __len,
> -				 size_t __buflen)
> -     __THROW __nonnull ((2, 3)) __wur __attr_access ((__write_only__, 3, 4));
> -extern ssize_t __REDIRECT_NTH (__readlinkat_alias,
> -			       (int __fd, const char *__restrict __path,
> -				char *__restrict __buf, size_t __len),
> -			       readlinkat)
> -     __nonnull ((2, 3)) __wur __attr_access ((__write_only__, 3, 4));
> -extern ssize_t __REDIRECT_NTH (__readlinkat_chk_warn,
> -			       (int __fd, const char *__restrict __path,
> -				char *__restrict __buf, size_t __len,
> -				size_t __buflen), __readlinkat_chk)
> -     __nonnull ((2, 3)) __wur __warnattr ("readlinkat called with bigger "
> -					  "length than size of destination "
> -					  "buffer");
> -
>   __fortify_function __nonnull ((2, 3)) __wur ssize_t
>   __NTH (readlinkat (int __fd, const char *__restrict __path,
>   		   char *__restrict __buf, size_t __len))
> @@ -150,16 +82,6 @@ __NTH (readlinkat (int __fd, const char *__restrict __path,
>   }
>   #endif
>   
> -extern char *__getcwd_chk (char *__buf, size_t __size, size_t __buflen)
> -     __THROW __wur;
> -extern char *__REDIRECT_NTH (__getcwd_alias,
> -			     (char *__buf, size_t __size), getcwd) __wur;
> -extern char *__REDIRECT_NTH (__getcwd_chk_warn,
> -			     (char *__buf, size_t __size, size_t __buflen),
> -			     __getcwd_chk)
> -     __wur __warnattr ("getcwd caller with bigger length than size of "
> -		       "destination buffer");
> -
>   __fortify_function __wur char *
>   __NTH (getcwd (char *__buf, size_t __size))
>   {
> @@ -169,12 +91,6 @@ __NTH (getcwd (char *__buf, size_t __size))
>   }
>   
>   #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
> -extern char *__getwd_chk (char *__buf, size_t buflen)
> -     __THROW __nonnull ((1)) __wur __attr_access ((__write_only__, 1, 2));
> -extern char *__REDIRECT_NTH (__getwd_warn, (char *__buf), getwd)
> -     __nonnull ((1)) __wur __warnattr ("please use getcwd instead, as getwd "
> -				       "doesn't specify buffer size");
> -
>   __fortify_function __nonnull ((1)) __attribute_deprecated__ __wur char *
>   __NTH (getwd (char *__buf))
>   {
> @@ -184,18 +100,6 @@ __NTH (getwd (char *__buf))
>   }
>   #endif
>   
> -extern size_t __confstr_chk (int __name, char *__buf, size_t __len,
> -			     size_t __buflen) __THROW
> -  __attr_access ((__write_only__, 2, 3));
> -extern size_t __REDIRECT_NTH (__confstr_alias, (int __name, char *__buf,
> -						size_t __len), confstr)
> -   __attr_access ((__write_only__, 2, 3));
> -extern size_t __REDIRECT_NTH (__confstr_chk_warn,
> -			      (int __name, char *__buf, size_t __len,
> -			       size_t __buflen), __confstr_chk)
> -     __warnattr ("confstr called with bigger length than size of destination "
> -		 "buffer");
> -
>   __fortify_function size_t
>   __NTH (confstr (int __name, char *__buf, size_t __len))
>   {
> @@ -205,16 +109,6 @@ __NTH (confstr (int __name, char *__buf, size_t __len))
>   }
>   
>   
> -extern int __getgroups_chk (int __size, __gid_t __list[], size_t __listlen)
> -  __THROW __wur __attr_access ((__write_only__, 2, 1));
> -extern int __REDIRECT_NTH (__getgroups_alias, (int __size, __gid_t __list[]),
> -			   getgroups) __wur __attr_access ((__write_only__, 2, 1));
> -extern int __REDIRECT_NTH (__getgroups_chk_warn,
> -			   (int __size, __gid_t __list[], size_t __listlen),
> -			   __getgroups_chk)
> -     __wur __warnattr ("getgroups called with bigger group count than what "
> -		       "can fit into destination buffer");
> -
>   __fortify_function int
>   __NTH (getgroups (int __size, __gid_t __list[]))
>   {
> @@ -224,18 +118,6 @@ __NTH (getgroups (int __size, __gid_t __list[]))
>   }
>   
>   
> -extern int __ttyname_r_chk (int __fd, char *__buf, size_t __buflen,
> -			    size_t __nreal) __THROW __nonnull ((2))
> -   __attr_access ((__write_only__, 2, 3));
> -extern int __REDIRECT_NTH (__ttyname_r_alias, (int __fd, char *__buf,
> -					       size_t __buflen), ttyname_r)
> -     __nonnull ((2));
> -extern int __REDIRECT_NTH (__ttyname_r_chk_warn,
> -			   (int __fd, char *__buf, size_t __buflen,
> -			    size_t __nreal), __ttyname_r_chk)
> -     __nonnull ((2)) __warnattr ("ttyname_r called with bigger buflen than "
> -				 "size of destination buffer");
> -
>   __fortify_function int
>   __NTH (ttyname_r (int __fd, char *__buf, size_t __buflen))
>   {
> @@ -246,16 +128,6 @@ __NTH (ttyname_r (int __fd, char *__buf, size_t __buflen))
>   
>   
>   #ifdef __USE_POSIX199506
> -extern int __getlogin_r_chk (char *__buf, size_t __buflen, size_t __nreal)
> -     __nonnull ((1)) __attr_access ((__write_only__, 1, 2));
> -extern int __REDIRECT (__getlogin_r_alias, (char *__buf, size_t __buflen),
> -		       getlogin_r) __nonnull ((1));
> -extern int __REDIRECT (__getlogin_r_chk_warn,
> -		       (char *__buf, size_t __buflen, size_t __nreal),
> -		       __getlogin_r_chk)
> -     __nonnull ((1)) __warnattr ("getlogin_r called with bigger buflen than "
> -				 "size of destination buffer");
> -
>   __fortify_function int
>   getlogin_r (char *__buf, size_t __buflen)
>   {
> @@ -267,17 +139,6 @@ getlogin_r (char *__buf, size_t __buflen)
>   
>   
>   #if defined __USE_MISC || defined __USE_UNIX98
> -extern int __gethostname_chk (char *__buf, size_t __buflen, size_t __nreal)
> -     __THROW __nonnull ((1)) __attr_access ((__write_only__, 1, 2));
> -extern int __REDIRECT_NTH (__gethostname_alias, (char *__buf, size_t __buflen),
> -			   gethostname)
> -  __nonnull ((1)) __attr_access ((__write_only__, 1, 2));
> -extern int __REDIRECT_NTH (__gethostname_chk_warn,
> -			   (char *__buf, size_t __buflen, size_t __nreal),
> -			   __gethostname_chk)
> -     __nonnull ((1)) __warnattr ("gethostname called with bigger buflen than "
> -				 "size of destination buffer");
> -
>   __fortify_function int
>   __NTH (gethostname (char *__buf, size_t __buflen))
>   {
> @@ -289,19 +150,6 @@ __NTH (gethostname (char *__buf, size_t __buflen))
>   
>   
>   #if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_UNIX98)
> -extern int __getdomainname_chk (char *__buf, size_t __buflen, size_t __nreal)
> -     __THROW __nonnull ((1)) __wur __attr_access ((__write_only__, 1, 2));
> -extern int __REDIRECT_NTH (__getdomainname_alias, (char *__buf,
> -						   size_t __buflen),
> -			   getdomainname) __nonnull ((1))
> -  __wur __attr_access ((__write_only__, 1, 2));
> -extern int __REDIRECT_NTH (__getdomainname_chk_warn,
> -			   (char *__buf, size_t __buflen, size_t __nreal),
> -			   __getdomainname_chk)
> -     __nonnull ((1)) __wur __warnattr ("getdomainname called with bigger "
> -				       "buflen than size of destination "
> -				       "buffer");
> -
>   __fortify_function int
>   __NTH (getdomainname (char *__buf, size_t __buflen))
>   {