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|
# serial 36
# Copyright (C) 2001, 2003, 2005-2006, 2009-2024 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
dnl From Volker Borchert.
dnl Determine whether rename works for source file names with a trailing slash.
dnl The rename from SunOS 4.1.1_U1 doesn't.
dnl
dnl If it doesn't, arrange to compile the wrapper function and define
dnl macros for use by that function.
dnl
AC_DEFUN([gl_FUNC_RENAME],
[
AC_REQUIRE([AC_CANONICAL_HOST])
AC_REQUIRE([gl_STDIO_H_DEFAULTS])
AC_CHECK_FUNCS_ONCE([lstat])
dnl Solaris 11.3, AIX 7.1 mistakenly allow rename("file","name/").
dnl NetBSD 1.6 mistakenly forbids rename("dir","name/").
dnl FreeBSD 7.2 mistakenly allows rename("file","link-to-file/").
dnl The Solaris bug can be worked around without stripping
dnl trailing slash, while the NetBSD bug requires stripping;
dnl the two conditions can be distinguished by whether hard
dnl links are also broken.
AC_CACHE_CHECK([whether rename honors trailing slash on destination],
[gl_cv_func_rename_slash_dst_works],
[rm -rf conftest.f conftest.f1 conftest.f2 conftest.d1 conftest.d2 conftest.lnk
touch conftest.f && touch conftest.f1 && mkdir conftest.d1 ||
AC_MSG_ERROR([cannot create temporary files])
# Assume that if we have lstat, we can also check symlinks.
if test $ac_cv_func_lstat = yes; then
ln -s conftest.f conftest.lnk
fi
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
# include <stdio.h>
# include <stdlib.h>
]],
[[int result = 0;
if (rename ("conftest.f1", "conftest.f2/") == 0)
result |= 1;
if (rename ("conftest.d1", "conftest.d2/") != 0)
result |= 2;
#if HAVE_LSTAT
if (rename ("conftest.f", "conftest.lnk/") == 0)
result |= 4;
#endif
return result;
]])],
[gl_cv_func_rename_slash_dst_works=yes],
[gl_cv_func_rename_slash_dst_works=no],
dnl When crosscompiling, assume rename is broken.
[case "$host_os" in
# Guess yes on Linux systems.
linux-* | linux) gl_cv_func_rename_slash_dst_works="guessing yes" ;;
# Guess yes on systems that emulate the Linux system calls.
midipix*) gl_cv_func_rename_slash_dst_works="guessing yes" ;;
# Guess yes on glibc systems.
*-gnu*) gl_cv_func_rename_slash_dst_works="guessing yes" ;;
# Guess no on native Windows.
mingw* | windows*) gl_cv_func_rename_slash_dst_works="guessing no" ;;
# If we don't know, obey --enable-cross-guesses.
*) gl_cv_func_rename_slash_dst_works="$gl_cross_guess_normal" ;;
esac
])
rm -rf conftest.f conftest.f1 conftest.f2 conftest.d1 conftest.d2 conftest.lnk
])
case "$gl_cv_func_rename_slash_dst_works" in
*yes) ;;
*)
REPLACE_RENAME=1
AC_DEFINE([RENAME_TRAILING_SLASH_DEST_BUG], [1],
[Define if rename does not correctly handle slashes on the destination
argument, such as on Solaris 11 or NetBSD 1.6.])
;;
esac
dnl SunOS 4.1.1_U1 mistakenly forbids rename("dir/","name").
dnl Solaris 9 mistakenly allows rename("file/","name").
dnl FreeBSD 7.2 mistakenly allows rename("link-to-file/","name").
dnl These bugs require stripping trailing slash to avoid corrupting
dnl symlinks with a trailing slash.
AC_CACHE_CHECK([whether rename honors trailing slash on source],
[gl_cv_func_rename_slash_src_works],
[rm -rf conftest.f conftest.f1 conftest.d1 conftest.d2 conftest.d3 conftest.lnk
touch conftest.f && touch conftest.f1 && mkdir conftest.d1 ||
AC_MSG_ERROR([cannot create temporary files])
# Assume that if we have lstat, we can also check symlinks.
if test $ac_cv_func_lstat = yes; then
ln -s conftest.f conftest.lnk
fi
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
# include <stdio.h>
# include <stdlib.h>
]],
[[int result = 0;
if (rename ("conftest.f1/", "conftest.d3") == 0)
result |= 1;
if (rename ("conftest.d1/", "conftest.d2") != 0)
result |= 2;
#if HAVE_LSTAT
if (rename ("conftest.lnk/", "conftest.f") == 0)
result |= 4;
#endif
return result;
]])],
[gl_cv_func_rename_slash_src_works=yes],
[gl_cv_func_rename_slash_src_works=no],
dnl When crosscompiling, assume rename is broken.
[case "$host_os" in
# Guess yes on Linux systems.
linux-* | linux) gl_cv_func_rename_slash_src_works="guessing yes" ;;
# Guess yes on systems that emulate the Linux system calls.
midipix*) gl_cv_func_rename_slash_src_works="guessing yes" ;;
# Guess yes on glibc systems.
*-gnu*) gl_cv_func_rename_slash_src_works="guessing yes" ;;
# Guess yes on native Windows.
mingw* | windows*) gl_cv_func_rename_slash_src_works="guessing yes" ;;
# If we don't know, obey --enable-cross-guesses.
*) gl_cv_func_rename_slash_src_works="$gl_cross_guess_normal" ;;
esac
])
rm -rf conftest.f conftest.f1 conftest.d1 conftest.d2 conftest.d3 conftest.lnk
])
case "$gl_cv_func_rename_slash_src_works" in
*yes) ;;
*)
REPLACE_RENAME=1
AC_DEFINE([RENAME_TRAILING_SLASH_SOURCE_BUG], [1],
[Define if rename does not correctly handle slashes on the source
argument, such as on Solaris 9 or cygwin 1.5.])
;;
esac
dnl NetBSD 1.6 and cygwin 1.5.x mistakenly reduce hard link count
dnl on rename("h1","h2").
dnl This bug requires stat'ting targets prior to attempting rename.
AC_CHECK_FUNCS_ONCE([link])
AC_CACHE_CHECK([whether rename manages hard links correctly],
[gl_cv_func_rename_link_works],
[if test $ac_cv_func_link = yes; then
if test $cross_compiling != yes; then
rm -rf conftest.f conftest.f1 conftest.f2
if touch conftest.f conftest.f2 && ln conftest.f conftest.f1 &&
set x `ls -i conftest.f conftest.f1` && test "$2" = "$4"; then
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
# include <errno.h>
# include <stdio.h>
# include <stdlib.h>
# include <unistd.h>
]GL_MDA_DEFINES],
[[int result = 0;
if (rename ("conftest.f", "conftest.f1"))
result |= 1;
if (unlink ("conftest.f1"))
result |= 2;
/* Allow either the POSIX-required behavior, where the
previous rename kept conftest.f, or the (better) NetBSD
behavior, where it removed conftest.f. */
if (rename ("conftest.f", "conftest.f") != 0
&& errno != ENOENT)
result |= 4;
if (rename ("conftest.f1", "conftest.f1") == 0)
result |= 8;
if (rename ("conftest.f2", "conftest.f2") != 0)
result |= 16;
return result;
]])],
[gl_cv_func_rename_link_works=yes],
[gl_cv_func_rename_link_works=no],
[dnl We don't get here.
:
])
else
gl_cv_func_rename_link_works="guessing no"
fi
rm -rf conftest.f conftest.f1 conftest.f2
else
dnl When crosscompiling, assume rename is broken.
case "$host_os" in
# Guess yes on Linux systems.
linux-* | linux) gl_cv_func_rename_link_works="guessing yes" ;;
# Guess yes on systems that emulate the Linux system calls.
midipix*) gl_cv_func_rename_link_works="guessing yes" ;;
# Guess yes on glibc systems.
*-gnu*) gl_cv_func_rename_link_works="guessing yes" ;;
# Guess yes on native Windows.
mingw* | windows*) gl_cv_func_rename_link_works="guessing yes" ;;
# If we don't know, obey --enable-cross-guesses.
*) gl_cv_func_rename_link_works="$gl_cross_guess_normal" ;;
esac
fi
else
gl_cv_func_rename_link_works=yes
fi
])
case "$gl_cv_func_rename_link_works" in
*yes) ;;
*)
REPLACE_RENAME=1
AC_DEFINE([RENAME_HARD_LINK_BUG], [1],
[Define if rename fails to leave hard links alone, as on NetBSD 1.6
or Cygwin 1.5.])
;;
esac
dnl Cygwin 1.5.x mistakenly allows rename("dir","file").
dnl mingw mistakenly forbids rename("dir1","dir2").
dnl These bugs require stripping trailing slash to avoid corrupting
dnl symlinks with a trailing slash.
AC_CACHE_CHECK([whether rename manages existing destinations correctly],
[gl_cv_func_rename_dest_works],
[rm -rf conftest.f conftest.d1 conftest.d2
touch conftest.f && mkdir conftest.d1 conftest.d2 ||
AC_MSG_ERROR([cannot create temporary files])
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
# include <stdio.h>
# include <stdlib.h>
]],
[[int result = 0;
if (rename ("conftest.d1", "conftest.d2") != 0)
result |= 1;
if (rename ("conftest.d2", "conftest.f") == 0)
result |= 2;
return result;
]])],
[gl_cv_func_rename_dest_works=yes],
[gl_cv_func_rename_dest_works=no],
dnl When crosscompiling, assume rename is broken.
[case "$host_os" in
# Guess yes on Linux systems.
linux-* | linux) gl_cv_func_rename_dest_works="guessing yes" ;;
# Guess yes on glibc systems.
*-gnu*) gl_cv_func_rename_dest_works="guessing yes" ;;
# Guess no on native Windows.
mingw* | windows*) gl_cv_func_rename_dest_works="guessing no" ;;
# If we don't know, obey --enable-cross-guesses.
*) gl_cv_func_rename_dest_works="$gl_cross_guess_normal" ;;
esac
])
rm -rf conftest.f conftest.d1 conftest.d2
])
case "$gl_cv_func_rename_dest_works" in
*yes) ;;
*)
REPLACE_RENAME=1
AC_DEFINE([RENAME_DEST_EXISTS_BUG], [1],
[Define if rename does not work when the destination file exists,
as on Cygwin 1.5 or Windows.])
;;
esac
])
|
