# serial 31 # Copyright (C) 2001, 2003, 2005-2006, 2009-2018 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, then define RENAME_TRAILING_SLASH_BUG and arrange dnl to compile the wrapper 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 $ac_cv_func_lstat = yes; then ln -s conftest.f conftest.lnk fi AC_RUN_IFELSE( [AC_LANG_PROGRAM([[ # include # include ]], [[int result = 0; if (rename ("conftest.f1", "conftest.f2/") == 0) result |= 1; if (rename ("conftest.d1", "conftest.d2/") != 0) result |= 2; #if HAVE_LSTAT if (rename ("conftest.f", "conftest.lnk/") == 0) result |= 4; #endif return result; ]])], [gl_cv_func_rename_slash_dst_works=yes], [gl_cv_func_rename_slash_dst_works=no], dnl When crosscompiling, assume rename is broken. [case "$host_os" in # Guess yes on Linux systems. linux-* | linux) gl_cv_func_rename_slash_dst_works="guessing yes" ;; # Guess yes on glibc systems. *-gnu*) gl_cv_func_rename_slash_dst_works="guessing yes" ;; # Guess no on native Windows. mingw*) gl_cv_func_rename_slash_dst_works="guessing no" ;; # If we don't know, assume the worst. *) gl_cv_func_rename_slash_dst_works="guessing no" ;; 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 $ac_cv_func_lstat = yes; then ln -s conftest.f conftest.lnk fi AC_RUN_IFELSE( [AC_LANG_PROGRAM([[ # include # include ]], [[int result = 0; if (rename ("conftest.f1/", "conftest.d3") == 0) result |= 1; if (rename ("conftest.d1/", "conftest.d2") != 0) result |= 2; #if HAVE_LSTAT if (rename ("conftest.lnk/", "conftest.f") == 0) result |= 4; #endif return result; ]])], [gl_cv_func_rename_slash_src_works=yes], [gl_cv_func_rename_slash_src_works=no], dnl When crosscompiling, assume rename is broken. [case "$host_os" in # Guess yes on Linux systems. linux-* | linux) gl_cv_func_rename_slash_src_works="guessing yes" ;; # Guess yes on glibc systems. *-gnu*) gl_cv_func_rename_slash_src_works="guessing yes" ;; # Guess yes on native Windows. mingw*) gl_cv_func_rename_slash_src_works="guessing yes" ;; # If we don't know, assume the worst. *) gl_cv_func_rename_slash_src_works="guessing no" ;; 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 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" = "$4"; then AC_RUN_IFELSE( [AC_LANG_PROGRAM([[ # include # include # include # include ]], [[int result = 0; if (rename ("conftest.f", "conftest.f1")) result |= 1; if (unlink ("conftest.f1")) result |= 2; /* Allow either the POSIX-required behavior, where the previous rename kept conftest.f, or the (better) NetBSD behavior, where it removed conftest.f. */ if (rename ("conftest.f", "conftest.f") != 0 && errno != ENOENT) result |= 4; if (rename ("conftest.f1", "conftest.f1") == 0) result |= 8; if (rename ("conftest.f2", "conftest.f2") != 0) result |= 16; return result; ]])], [gl_cv_func_rename_link_works=yes], [gl_cv_func_rename_link_works=no], dnl When crosscompiling, assume rename is broken. [case "$host_os" in # Guess yes on Linux systems. linux-* | linux) gl_cv_func_rename_link_works="guessing yes" ;; # Guess yes on glibc systems. *-gnu*) gl_cv_func_rename_link_works="guessing yes" ;; # Guess yes on native Windows. mingw*) gl_cv_func_rename_link_works="guessing yes" ;; # If we don't know, assume the worst. *) gl_cv_func_rename_link_works="guessing no" ;; esac ]) else gl_cv_func_rename_link_works="guessing no" fi rm -rf conftest.f conftest.f1 conftest.f2 else gl_cv_func_rename_link_works=yes fi ]) case "$gl_cv_func_rename_link_works" in *yes) ;; *) REPLACE_RENAME=1 AC_DEFINE([RENAME_HARD_LINK_BUG], [1], [Define if rename fails to leave hard links alone, as on NetBSD 1.6 or Cygwin 1.5.]) ;; esac dnl Cygwin 1.5.x mistakenly allows rename("dir","file"). dnl mingw mistakenly forbids rename("dir1","dir2"). dnl These bugs require stripping trailing slash to avoid corrupting dnl symlinks with a trailing slash. AC_CACHE_CHECK([whether rename manages existing destinations correctly], [gl_cv_func_rename_dest_works], [rm -rf conftest.f conftest.d1 conftest.d2 touch conftest.f && mkdir conftest.d1 conftest.d2 || AC_MSG_ERROR([cannot create temporary files]) AC_RUN_IFELSE( [AC_LANG_PROGRAM([[ # include # include ]], [[int result = 0; if (rename ("conftest.d1", "conftest.d2") != 0) result |= 1; if (rename ("conftest.d2", "conftest.f") == 0) result |= 2; return result; ]])], [gl_cv_func_rename_dest_works=yes], [gl_cv_func_rename_dest_works=no], dnl When crosscompiling, assume rename is broken. [case "$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*) gl_cv_func_rename_dest_works="guessing no" ;; # If we don't know, assume the worst. *) gl_cv_func_rename_dest_works="guessing no" ;; 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 ])