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