1# serial 33 2 3# Copyright (C) 2001, 2003, 2005-2006, 2009-2022 Free Software Foundation, Inc. 4# This file is free software; the Free Software Foundation 5# gives unlimited permission to copy and/or distribute it, 6# with or without modifications, as long as this notice is preserved. 7 8dnl From Volker Borchert. 9dnl Determine whether rename works for source file names with a trailing slash. 10dnl The rename from SunOS 4.1.1_U1 doesn't. 11dnl 12dnl If it doesn't, then define RENAME_TRAILING_SLASH_BUG and arrange 13dnl to compile the wrapper function. 14dnl 15 16AC_DEFUN([gl_FUNC_RENAME], 17[ 18 AC_REQUIRE([AC_CANONICAL_HOST]) 19 AC_REQUIRE([gl_STDIO_H_DEFAULTS]) 20 AC_CHECK_FUNCS_ONCE([lstat]) 21 22 dnl Solaris 11.3, AIX 7.1 mistakenly allow rename("file","name/"). 23 dnl NetBSD 1.6 mistakenly forbids rename("dir","name/"). 24 dnl FreeBSD 7.2 mistakenly allows rename("file","link-to-file/"). 25 dnl The Solaris bug can be worked around without stripping 26 dnl trailing slash, while the NetBSD bug requires stripping; 27 dnl the two conditions can be distinguished by whether hard 28 dnl links are also broken. 29 AC_CACHE_CHECK([whether rename honors trailing slash on destination], 30 [gl_cv_func_rename_slash_dst_works], 31 [rm -rf conftest.f conftest.f1 conftest.f2 conftest.d1 conftest.d2 conftest.lnk 32 touch conftest.f && touch conftest.f1 && mkdir conftest.d1 || 33 AC_MSG_ERROR([cannot create temporary files]) 34 # Assume that if we have lstat, we can also check symlinks. 35 if test $ac_cv_func_lstat = yes; then 36 ln -s conftest.f conftest.lnk 37 fi 38 AC_RUN_IFELSE( 39 [AC_LANG_PROGRAM([[ 40# include <stdio.h> 41# include <stdlib.h> 42 ]], 43 [[int result = 0; 44 if (rename ("conftest.f1", "conftest.f2/") == 0) 45 result |= 1; 46 if (rename ("conftest.d1", "conftest.d2/") != 0) 47 result |= 2; 48#if HAVE_LSTAT 49 if (rename ("conftest.f", "conftest.lnk/") == 0) 50 result |= 4; 51#endif 52 return result; 53 ]])], 54 [gl_cv_func_rename_slash_dst_works=yes], 55 [gl_cv_func_rename_slash_dst_works=no], 56 dnl When crosscompiling, assume rename is broken. 57 [case "$host_os" in 58 # Guess yes on Linux systems. 59 linux-* | linux) gl_cv_func_rename_slash_dst_works="guessing yes" ;; 60 # Guess yes on glibc systems. 61 *-gnu*) gl_cv_func_rename_slash_dst_works="guessing yes" ;; 62 # Guess no on native Windows. 63 mingw*) gl_cv_func_rename_slash_dst_works="guessing no" ;; 64 # If we don't know, obey --enable-cross-guesses. 65 *) gl_cv_func_rename_slash_dst_works="$gl_cross_guess_normal" ;; 66 esac 67 ]) 68 rm -rf conftest.f conftest.f1 conftest.f2 conftest.d1 conftest.d2 conftest.lnk 69 ]) 70 case "$gl_cv_func_rename_slash_dst_works" in 71 *yes) ;; 72 *) 73 REPLACE_RENAME=1 74 AC_DEFINE([RENAME_TRAILING_SLASH_DEST_BUG], [1], 75 [Define if rename does not correctly handle slashes on the destination 76 argument, such as on Solaris 11 or NetBSD 1.6.]) 77 ;; 78 esac 79 80 dnl SunOS 4.1.1_U1 mistakenly forbids rename("dir/","name"). 81 dnl Solaris 9 mistakenly allows rename("file/","name"). 82 dnl FreeBSD 7.2 mistakenly allows rename("link-to-file/","name"). 83 dnl These bugs require stripping trailing slash to avoid corrupting 84 dnl symlinks with a trailing slash. 85 AC_CACHE_CHECK([whether rename honors trailing slash on source], 86 [gl_cv_func_rename_slash_src_works], 87 [rm -rf conftest.f conftest.f1 conftest.d1 conftest.d2 conftest.d3 conftest.lnk 88 touch conftest.f && touch conftest.f1 && mkdir conftest.d1 || 89 AC_MSG_ERROR([cannot create temporary files]) 90 # Assume that if we have lstat, we can also check symlinks. 91 if test $ac_cv_func_lstat = yes; then 92 ln -s conftest.f conftest.lnk 93 fi 94 AC_RUN_IFELSE( 95 [AC_LANG_PROGRAM([[ 96# include <stdio.h> 97# include <stdlib.h> 98 ]], 99 [[int result = 0; 100 if (rename ("conftest.f1/", "conftest.d3") == 0) 101 result |= 1; 102 if (rename ("conftest.d1/", "conftest.d2") != 0) 103 result |= 2; 104#if HAVE_LSTAT 105 if (rename ("conftest.lnk/", "conftest.f") == 0) 106 result |= 4; 107#endif 108 return result; 109 ]])], 110 [gl_cv_func_rename_slash_src_works=yes], 111 [gl_cv_func_rename_slash_src_works=no], 112 dnl When crosscompiling, assume rename is broken. 113 [case "$host_os" in 114 # Guess yes on Linux systems. 115 linux-* | linux) gl_cv_func_rename_slash_src_works="guessing yes" ;; 116 # Guess yes on glibc systems. 117 *-gnu*) gl_cv_func_rename_slash_src_works="guessing yes" ;; 118 # Guess yes on native Windows. 119 mingw*) gl_cv_func_rename_slash_src_works="guessing yes" ;; 120 # If we don't know, obey --enable-cross-guesses. 121 *) gl_cv_func_rename_slash_src_works="$gl_cross_guess_normal" ;; 122 esac 123 ]) 124 rm -rf conftest.f conftest.f1 conftest.d1 conftest.d2 conftest.d3 conftest.lnk 125 ]) 126 case "$gl_cv_func_rename_slash_src_works" in 127 *yes) ;; 128 *) 129 REPLACE_RENAME=1 130 AC_DEFINE([RENAME_TRAILING_SLASH_SOURCE_BUG], [1], 131 [Define if rename does not correctly handle slashes on the source 132 argument, such as on Solaris 9 or cygwin 1.5.]) 133 ;; 134 esac 135 136 dnl NetBSD 1.6 and cygwin 1.5.x mistakenly reduce hard link count 137 dnl on rename("h1","h2"). 138 dnl This bug requires stat'ting targets prior to attempting rename. 139 AC_CHECK_FUNCS_ONCE([link]) 140 AC_CACHE_CHECK([whether rename manages hard links correctly], 141 [gl_cv_func_rename_link_works], 142 [if test $ac_cv_func_link = yes; then 143 if test $cross_compiling != yes; then 144 rm -rf conftest.f conftest.f1 conftest.f2 145 if touch conftest.f conftest.f2 && ln conftest.f conftest.f1 && 146 set x `ls -i conftest.f conftest.f1` && test "$2" = "$4"; then 147 AC_RUN_IFELSE( 148 [AC_LANG_PROGRAM([[ 149# include <errno.h> 150# include <stdio.h> 151# include <stdlib.h> 152# include <unistd.h> 153 ]GL_MDA_DEFINES], 154 [[int result = 0; 155 if (rename ("conftest.f", "conftest.f1")) 156 result |= 1; 157 if (unlink ("conftest.f1")) 158 result |= 2; 159 160 /* Allow either the POSIX-required behavior, where the 161 previous rename kept conftest.f, or the (better) NetBSD 162 behavior, where it removed conftest.f. */ 163 if (rename ("conftest.f", "conftest.f") != 0 164 && errno != ENOENT) 165 result |= 4; 166 167 if (rename ("conftest.f1", "conftest.f1") == 0) 168 result |= 8; 169 if (rename ("conftest.f2", "conftest.f2") != 0) 170 result |= 16; 171 return result; 172 ]])], 173 [gl_cv_func_rename_link_works=yes], 174 [gl_cv_func_rename_link_works=no], 175 [dnl We don't get here. 176 : 177 ]) 178 else 179 gl_cv_func_rename_link_works="guessing no" 180 fi 181 rm -rf conftest.f conftest.f1 conftest.f2 182 else 183 dnl When crosscompiling, assume rename is broken. 184 case "$host_os" in 185 # Guess yes on Linux systems. 186 linux-* | linux) gl_cv_func_rename_link_works="guessing yes" ;; 187 # Guess yes on glibc systems. 188 *-gnu*) gl_cv_func_rename_link_works="guessing yes" ;; 189 # Guess yes on native Windows. 190 mingw*) gl_cv_func_rename_link_works="guessing yes" ;; 191 # If we don't know, obey --enable-cross-guesses. 192 *) gl_cv_func_rename_link_works="$gl_cross_guess_normal" ;; 193 esac 194 fi 195 else 196 gl_cv_func_rename_link_works=yes 197 fi 198 ]) 199 case "$gl_cv_func_rename_link_works" in 200 *yes) ;; 201 *) 202 REPLACE_RENAME=1 203 AC_DEFINE([RENAME_HARD_LINK_BUG], [1], 204 [Define if rename fails to leave hard links alone, as on NetBSD 1.6 205 or Cygwin 1.5.]) 206 ;; 207 esac 208 209 dnl Cygwin 1.5.x mistakenly allows rename("dir","file"). 210 dnl mingw mistakenly forbids rename("dir1","dir2"). 211 dnl These bugs require stripping trailing slash to avoid corrupting 212 dnl symlinks with a trailing slash. 213 AC_CACHE_CHECK([whether rename manages existing destinations correctly], 214 [gl_cv_func_rename_dest_works], 215 [rm -rf conftest.f conftest.d1 conftest.d2 216 touch conftest.f && mkdir conftest.d1 conftest.d2 || 217 AC_MSG_ERROR([cannot create temporary files]) 218 AC_RUN_IFELSE( 219 [AC_LANG_PROGRAM([[ 220# include <stdio.h> 221# include <stdlib.h> 222 ]], 223 [[int result = 0; 224 if (rename ("conftest.d1", "conftest.d2") != 0) 225 result |= 1; 226 if (rename ("conftest.d2", "conftest.f") == 0) 227 result |= 2; 228 return result; 229 ]])], 230 [gl_cv_func_rename_dest_works=yes], 231 [gl_cv_func_rename_dest_works=no], 232 dnl When crosscompiling, assume rename is broken. 233 [case "$host_os" in 234 # Guess yes on Linux systems. 235 linux-* | linux) gl_cv_func_rename_dest_works="guessing yes" ;; 236 # Guess yes on glibc systems. 237 *-gnu*) gl_cv_func_rename_dest_works="guessing yes" ;; 238 # Guess no on native Windows. 239 mingw*) gl_cv_func_rename_dest_works="guessing no" ;; 240 # If we don't know, obey --enable-cross-guesses. 241 *) gl_cv_func_rename_dest_works="$gl_cross_guess_normal" ;; 242 esac 243 ]) 244 rm -rf conftest.f conftest.d1 conftest.d2 245 ]) 246 case "$gl_cv_func_rename_dest_works" in 247 *yes) ;; 248 *) 249 REPLACE_RENAME=1 250 AC_DEFINE([RENAME_DEST_EXISTS_BUG], [1], 251 [Define if rename does not work when the destination file exists, 252 as on Cygwin 1.5 or Windows.]) 253 ;; 254 esac 255]) 256