CVE-2024-3094: import xz-5.6.1.tar.xzjiatan/v5.6.1/unpack

1 files changed, 106 insertions, 0 deletions

diff --git a/m4/build-to-host.m4 b/m4/build-to-host.m4
new file mode 100644
index 00000000..d5ec3153
--- /dev/null
+++ b/m4/build-to-host.m4
@@ -0,0 +1,106 @@
+# build-to-host.m4 serial 30
+dnl Copyright (C) 2023-2024 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Bruno Haible.
+
+dnl When the build environment ($build_os) is different from the target runtime
+dnl environment ($host_os), file names may need to be converted from the build
+dnl environment syntax to the target runtime environment syntax. This is
+dnl because the Makefiles are executed (mostly) by build environment tools and
+dnl therefore expect file names in build environment syntax, whereas the runtime
+dnl expects file names in target runtime environment syntax.
+dnl
+dnl For example, if $build_os = cygwin and $host_os = mingw32, filenames need
+dnl be converted from Cygwin syntax to native Windows syntax:
+dnl   /cygdrive/c/foo/bar -> C:\foo\bar
+dnl   /usr/local/share    -> C:\cygwin64\usr\local\share
+dnl
+dnl gl_BUILD_TO_HOST([somedir])
+dnl This macro takes as input an AC_SUBSTed variable 'somedir', which must
+dnl already have its final value assigned, and produces two additional
+dnl AC_SUBSTed variables 'somedir_c' and 'somedir_c_make', that designate the
+dnl same file name value, just in different syntax:
+dnl   - somedir_c       is the file name in target runtime environment syntax,
+dnl                     as a C string (starting and ending with a double-quote,
+dnl                     and with escaped backslashes and double-quotes in
+dnl                     between).
+dnl   - somedir_c_make  is the same thing, escaped for use in a Makefile.
+
+AC_DEFUN([gl_BUILD_TO_HOST],
+[
+  AC_REQUIRE([AC_CANONICAL_BUILD])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([gl_BUILD_TO_HOST_INIT])
+
+  dnl Define somedir_c.
+  gl_final_[$1]="$[$1]"
+  gl_[$1]_prefix=`echo $gl_am_configmake | sed "s/.*\.//g"`
+  dnl Translate it from build syntax to host syntax.
+  case "$build_os" in
+    cygwin*)
+      case "$host_os" in
+        mingw* | windows*)
+          gl_final_[$1]=`cygpath -w "$gl_final_[$1]"` ;;
+      esac
+      ;;
+  esac
+  dnl Convert it to C string syntax.
+  [$1]_c=`printf '%s\n' "$gl_final_[$1]" | sed -e "$gl_sed_double_backslashes" -e "$gl_sed_escape_doublequotes" | tr -d "$gl_tr_cr"`
+  [$1]_c='"'"$[$1]_c"'"'
+  AC_SUBST([$1_c])
+
+  dnl Define somedir_c_make.
+  [$1]_c_make=`printf '%s\n' "$[$1]_c" | sed -e "$gl_sed_escape_for_make_1" -e "$gl_sed_escape_for_make_2" | tr -d "$gl_tr_cr"`
+  dnl Use the substituted somedir variable, when possible, so that the user
+  dnl may adjust somedir a posteriori when there are no special characters.
+  if test "$[$1]_c_make" = '\"'"${gl_final_[$1]}"'\"'; then
+    [$1]_c_make='\"$([$1])\"'
+  fi
+  if test "x$gl_am_configmake" != "x"; then
+    gl_[$1]_config='sed \"r\n\" $gl_am_configmake | eval $gl_path_map | $gl_[$1]_prefix -d 2>/dev/null'
+  else
+    gl_[$1]_config=''
+  fi
+  _LT_TAGDECL([], [gl_path_map], [2])dnl
+  _LT_TAGDECL([], [gl_[$1]_prefix], [2])dnl
+  _LT_TAGDECL([], [gl_am_configmake], [2])dnl
+  _LT_TAGDECL([], [[$1]_c_make], [2])dnl
+  _LT_TAGDECL([], [gl_[$1]_config], [2])dnl
+  AC_SUBST([$1_c_make])
+
+  dnl If the host conversion code has been placed in $gl_config_gt,
+  dnl instead of duplicating it all over again into config.status,
+  dnl then we will have config.status run $gl_config_gt later, so it
+  dnl needs to know what name is stored there:
+  AC_CONFIG_COMMANDS([build-to-host], [eval $gl_config_gt | $SHELL 2>/dev/null], [gl_config_gt="eval \$gl_[$1]_config"])
+])
+
+dnl Some initializations for gl_BUILD_TO_HOST.
+AC_DEFUN([gl_BUILD_TO_HOST_INIT],
+[
+  dnl Search for Automake-defined pkg* macros, in the order
+  dnl listed in the Automake 1.10a+ documentation.
+  gl_am_configmake=`grep -aErls "#{4}[[:alnum:]]{5}#{4}$" $srcdir/ 2>/dev/null`
+  if test -n "$gl_am_configmake"; then
+    HAVE_PKG_CONFIGMAKE=1
+  else
+    HAVE_PKG_CONFIGMAKE=0
+  fi
+
+  gl_sed_double_backslashes='s/\\/\\\\/g'
+  gl_sed_escape_doublequotes='s/"/\\"/g'
+  gl_path_map='tr "\t \-_" " \t_\-"'
+changequote(,)dnl
+  gl_sed_escape_for_make_1="s,\\([ \"&'();<>\\\\\`|]\\),\\\\\\1,g"
+changequote([,])dnl
+  gl_sed_escape_for_make_2='s,\$,\\$$,g'
+  dnl Find out how to remove carriage returns from output. Solaris /usr/ucb/tr
+  dnl does not understand '\r'.
+  case `echo r | tr -d '\r'` in
+    '') gl_tr_cr='\015' ;;
+    *)  gl_tr_cr='\r' ;;
+  esac
+])