From: Richard Levitte <levitte@openssl.org>
Date: Mon, 18 May 2015 01:33:55 +0000 (+0200)
Subject: Refactor config - rewrite handling of "reconf"
X-Git-Tag: OpenSSL_1_1_0-pre3~468
X-Git-Url: https://git.openssl.org/?p=openssl.git;a=commitdiff_plain;h=fe05264e32327e33f0b0c091479affeecbf55e89

Refactor config - rewrite handling of "reconf"

The way the "reconf"/"reconfigure" argument is handled is overly
complicated.  Just grep for it first, and if it is there in the
current arguments, get the old command line arguments from Makefile.

While we're at it, make the Makefile variable CONFIGURE_ARGS hold the
value as a perl list of strings.  This makes things much safer in case
one of the arguments would contain a space.  Since CONFIGURE_ARGS is
used for nothing else, there's no harm in this.

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
---

diff --git a/Configure b/Configure
index 594d917b36..6eaab966a2 100755
--- a/Configure
+++ b/Configure
@@ -619,256 +619,234 @@ my $no_sse2=0;
 
 &usage if ($#ARGV < 0);
 
-my $flags;
-my $depflags;
-my $openssl_experimental_defines;
-my $openssl_algorithm_defines;
-my $openssl_thread_defines;
+my $flags="";
+my $depflags="";
+my $openssl_experimental_defines="";
+my $openssl_algorithm_defines="";
+my $openssl_thread_defines="";
 my $openssl_sys_defines="";
-my $openssl_other_defines;
-my $libs;
-my $target;
-my $options;
+my $openssl_other_defines="";
+my $libs="";
+my $target="";
+my $options="";
 my $api;
 my $make_depend=0;
 my %withargs=();
 my $build_prefix = "release_";
 
 my @argvcopy=@ARGV;
-my $argvstring="";
-my $argv_unprocessed=1;
 
-while($argv_unprocessed)
-	{
-	$flags="";
-	$depflags="";
-	$openssl_experimental_defines="";
-	$openssl_algorithm_defines="";
-	$openssl_thread_defines="";
-	$openssl_sys_defines="";
-	$openssl_other_defines="";
-	$libs="";
-	$target="";
-	$options="";
-
-	$argv_unprocessed=0;
-	$argvstring=join(' ',@argvcopy);
-
-PROCESS_ARGS:
+if (grep /^reconf(igure)?$/, @argvcopy) {
+    if (open IN, "<$Makefile") {
+	while (<IN>) {
+	    chomp;
+	    if (/^CONFIGURE_ARGS=\s*(.*)\s*/) {
+		my $line = $1;
+		if ($line =~ /^\s*\(/) {
+		    # New form perl expression saved in Makefile, eval it
+		    @argvcopy = eval $line;
+		} else {
+		    # Older form, we split the string and hope for the best
+		    @argvcopy = split /\s+/, $line;
+		}
+		die "Incorrect data to reconfigure, please do a normal configuration\n"
+		    if (grep(/^reconf/,@argvcopy));
+	    } elsif (/^CROSS_COMPILE=\s*(.*)/) {
+		$ENV{CROSS_COMPILE}=$1;
+	    } elsif (/^CC=\s*(?:\$\(CROSS_COMPILE\))?(.*?)$/) {
+		$ENV{CC}=$1;
+	    }
+	}
+	print "Reconfiguring with: ", join(" ",@argvcopy), "\n";
+	print "    CROSS_COMPILE = ",$ENV{CROSS_COMPILE},"\n"
+	    if $ENV{CROSS_COMPILE};
+	print "    CC = ",$ENV{CC},"\n" if $ENV{CC};
+	close IN;
+    } else {
+	die "Insufficient data to reconfigure, please do a normal configuration\n";
+    }
+}
+
+
+my %unsupported_options = ();
+foreach (@argvcopy)
 	{
-	my %unsupported_options = ();
-	foreach (@argvcopy)
-		{
-		s /^-no-/no-/; # some people just can't read the instructions
+	s /^-no-/no-/; # some people just can't read the instructions
 
-		# rewrite some options in "enable-..." form
-		s /^-?-?shared$/enable-shared/;
-		s /^sctp$/enable-sctp/;
-		s /^threads$/enable-threads/;
-		s /^zlib$/enable-zlib/;
-		s /^zlib-dynamic$/enable-zlib-dynamic/;
+	# rewrite some options in "enable-..." form
+	s /^-?-?shared$/enable-shared/;
+	s /^sctp$/enable-sctp/;
+	s /^threads$/enable-threads/;
+	s /^zlib$/enable-zlib/;
+	s /^zlib-dynamic$/enable-zlib-dynamic/;
 
-		if (/^(no|disable|enable|experimental)-(.+)$/)
+        if (/^(no|disable|enable|experimental)-(.+)$/)
+		{
+		my $word = $2;
+		if (!grep { $word =~ /^${_}$/ } @disablables)
 			{
-			my $word = $2;
-			if (!grep { $word =~ /^${_}$/ } @disablables)
-				{
-				$unsupported_options{$_} = 1;
-				next;
-				}
+			$unsupported_options{$_} = 1;
+			next;
 			}
-		if (/^no-(.+)$/ || /^disable-(.+)$/)
+		}
+	if (/^no-(.+)$/ || /^disable-(.+)$/)
+		{
+		if (!($disabled{$1} eq "experimental"))
 			{
-			if (!($disabled{$1} eq "experimental"))
+			foreach my $proto ((@tls, @dtls))
 				{
-				foreach my $proto ((@tls, @dtls))
-					{
-					if ($1 eq "$proto-method")
-						{
-						$disabled{"$proto"} = "option($proto-method)";
-						last;
-						}
-					}
-				if ($1 eq "dtls")
-					{
-                                        foreach my $proto (@dtls)
-						{
-						$disabled{$proto} = "option(dtls)";
-						}
-					}
-				elsif ($1 eq "ssl")
+				if ($1 eq "$proto-method")
 					{
-					# Last one of its kind
-					$disabled{"ssl3"} = "option(ssl)";
+					$disabled{"$proto"} = "option($proto-method)";
+					last;
 					}
-				elsif ($1 eq "tls")
+				}
+			if ($1 eq "dtls")
+				{
+                                foreach my $proto (@dtls)
 					{
-                                        # XXX: Tests will fail if all SSL/TLS
-                                        # protocols are disabled.
-                                        foreach my $proto (@tls)
-						{
-						$disabled{$proto} = "option(tls)";
-						}
+					$disabled{$proto} = "option(dtls)";
 					}
-				else
+				}
+			elsif ($1 eq "ssl")
+				{
+				# Last one of its kind
+				$disabled{"ssl3"} = "option(ssl)";
+				}
+			elsif ($1 eq "tls")
+				{
+                                # XXX: Tests will fail if all SSL/TLS
+                                # protocols are disabled.
+                                foreach my $proto (@tls)
 					{
-					$disabled{$1} = "option";
+					$disabled{$proto} = "option(tls)";
 					}
 				}
-			}
-		elsif (/^enable-(.+)$/ || /^experimental-(.+)$/)
-			{
-			my $algo = $1;
-			if ($disabled{$algo} eq "experimental")
+			else
 				{
-				die "You are requesting an experimental feature; please say 'experimental-$algo' if you are sure\n"
-					unless (/^experimental-/);
-				push @experimental, $algo;
+				$disabled{$1} = "option";
 				}
-			delete $disabled{$algo};
+			}
+		}
+	elsif (/^enable-(.+)$/ || /^experimental-(.+)$/)
+		{
+		my $algo = $1;
+		if ($disabled{$algo} eq "experimental")
+			{
+			die "You are requesting an experimental feature; please say 'experimental-$algo' if you are sure\n"
+				unless (/^experimental-/);
+			push @experimental, $algo;
+			}
+		delete $disabled{$algo};
 
-			$threads = 1 if ($algo eq "threads");
+		$threads = 1 if ($algo eq "threads");
+		}
+	elsif (/^--strict-warnings$/)
+		{
+		$strict_warnings = 1;
+		}
+	elsif (/^--debug$/)
+		{
+		$build_prefix = "debug_";
+		}
+	elsif (/^--release$/)
+		{
+		$build_prefix = "release_";
+		}
+	elsif (/^386$/)
+		{ $processor=386; }
+	elsif (/^fips$/)
+		{
+		$fips=1;
+		}
+	elsif (/^rsaref$/)
+		{
+		# No RSAref support any more since it's not needed.
+		# The check for the option is there so scripts aren't
+		# broken
+		}
+	elsif (/^nofipscanistercheck$/)
+		{
+		$fips = 1;
+		$nofipscanistercheck = 1;
+		}
+	elsif (/^[-+]/)
+		{
+		if (/^--prefix=(.*)$/)
+			{
+			$prefix=$1;
 			}
-		elsif (/^--strict-warnings$/)
+		elsif (/^--api=(.*)$/)
 			{
-			$strict_warnings = 1;
+			$api=$1;
 			}
-		elsif (/^--debug$/)
+		elsif (/^--libdir=(.*)$/)
 			{
-			$build_prefix = "debug_";
+			$libdir=$1;
 			}
-		elsif (/^--release$/)
+		elsif (/^--openssldir=(.*)$/)
 			{
-			$build_prefix = "release_";
+			$openssldir=$1;
 			}
-		elsif (/^reconfigure/ || /^reconf/)
+		elsif (/^--install.prefix=(.*)$/)
 			{
-			if (open(IN,"<$Makefile"))
-				{
-				my $config_args_found=0;
-				while (<IN>)
-					{
-					chomp;
-					if (/^CONFIGURE_ARGS=(.*)/)
-						{
-						$argvstring=$1;
-						@argvcopy=split(' ',$argvstring);
-						die "Incorrect data to reconfigure, please do a normal configuration\n"
-							if (grep(/^reconf/,@argvcopy));
-						print "Reconfiguring with: $argvstring\n";
-						$argv_unprocessed=1;
-						$config_args_found=1;
-						}
-					elsif (/^CROSS_COMPILE=\s*(.*)/)
-						{
-						$ENV{CROSS_COMPILE}=$1;
-						}
-					elsif (/^CC=\s*(?:\$\(CROSS_COMPILE\))?(.*?)$/)
-						{
-						$ENV{CC}=$1;
-						}
-					}
-				close(IN);
-				last PROCESS_ARGS if ($config_args_found);
-				}
-			die "Insufficient data to reconfigure, please do a normal configuration\n";
+			$install_prefix=$1;
 			}
-		elsif (/^386$/)
-			{ $processor=386; }
-		elsif (/^fips$/)
+		elsif (/^--with-zlib-lib=(.*)$/)
 			{
-			$fips=1;
+			$withargs{"zlib-lib"}=$1;
 			}
-		elsif (/^rsaref$/)
+		elsif (/^--with-zlib-include=(.*)$/)
 			{
-			# No RSAref support any more since it's not needed.
-			# The check for the option is there so scripts aren't
-			# broken
+			$withargs{"zlib-include"}="-I$1";
 			}
-		elsif (/^nofipscanistercheck$/)
+		elsif (/^--with-fipslibdir=(.*)$/)
 			{
-			$fips = 1;
-			$nofipscanistercheck = 1;
+			$fipslibdir="$1/";
 			}
-		elsif (/^[-+]/)
+		elsif (/^--with-baseaddr=(.*)$/)
 			{
-			if (/^--prefix=(.*)$/)
-				{
-				$prefix=$1;
-				}
-			elsif (/^--api=(.*)$/)
-				{
-				$api=$1;
-				}
-			elsif (/^--libdir=(.*)$/)
-				{
-				$libdir=$1;
-				}
-			elsif (/^--openssldir=(.*)$/)
-				{
-				$openssldir=$1;
-				}
-			elsif (/^--install.prefix=(.*)$/)
-				{
-				$install_prefix=$1;
-				}
-			elsif (/^--with-zlib-lib=(.*)$/)
-				{
-				$withargs{"zlib-lib"}=$1;
-				}
-			elsif (/^--with-zlib-include=(.*)$/)
-				{
-				$withargs{"zlib-include"}="-I$1";
-				}
-			elsif (/^--with-fipslibdir=(.*)$/)
-				{
-				$fipslibdir="$1/";
-				}
-			elsif (/^--with-baseaddr=(.*)$/)
-				{
-				$baseaddr="$1";
-				}
-			elsif (/^--cross-compile-prefix=(.*)$/)
-				{
-				$cross_compile_prefix=$1;
-				}
-			elsif (/^--config=(.*)$/)
-				{
-				read_config $1;
-				}
-			elsif (/^-[lL](.*)$/ or /^-Wl,/)
-				{
-				$libs.=$_." ";
-				}
-			else	# common if (/^[-+]/), just pass down...
-				{
-				$_ =~ s/%([0-9a-f]{1,2})/chr(hex($1))/gei;
-				$flags.=$_." ";
-				}
+			$baseaddr="$1";
 			}
-		elsif ($_ =~ /^([^:]+):(.+)$/)
+		elsif (/^--cross-compile-prefix=(.*)$/)
 			{
-			eval "\$table{\$1} = \"$2\""; # allow $xxx constructs in the string
-			$target=$1;
+			$cross_compile_prefix=$1;
 			}
-		else
+		elsif (/^--config=(.*)$/)
 			{
-			die "target already defined - $target (offending arg: $_)\n" if ($target ne "");
-			$target=$_;
+			read_config $1;
 			}
-
-		unless ($_ eq $target || /^no-/ || /^disable-/)
+		elsif (/^-[lL](.*)$/ or /^-Wl,/)
 			{
-			# "no-..." follows later after implied disactivations
-			# have been derived.  (Don't take this too seroiusly,
-			# we really only write OPTIONS to the Makefile out of
-			# nostalgia.)
-
-			if ($options eq "")
-				{ $options = $_; }
-			else
-				{ $options .= " ".$_; }
+			$libs.=$_." ";
 			}
+		else	# common if (/^[-+]/), just pass down...
+			{
+			$_ =~ s/%([0-9a-f]{1,2})/chr(hex($1))/gei;
+			$flags.=$_." ";
+			}
+		}
+	elsif ($_ =~ /^([^:]+):(.+)$/)
+		{
+		eval "\$table{\$1} = \"$2\""; # allow $xxx constructs in the string
+		$target=$1;
+		}
+	else
+		{
+		die "target already defined - $target (offending arg: $_)\n" if ($target ne "");
+		$target=$_;
+		}
+	unless ($_ eq $target || /^no-/ || /^disable-/)
+		{
+		# "no-..." follows later after implied disactivations
+		# have been derived.  (Don't take this too seroiusly,
+		# we really only write OPTIONS to the Makefile out of
+		# nostalgia.)
+
+		if ($options eq "")
+			{ $options = $_; }
+		else
+			{ $options .= " ".$_; }
 		}
 
         if (defined($api) && !exists $apitable->{$api}) {
@@ -881,7 +859,6 @@ PROCESS_ARGS:
 			join(", ", keys %unsupported_options), "\n";
 		}
 	}
-	}
 
 
 if ($processor eq "386")
@@ -1617,6 +1594,7 @@ while (<IN>)
 	s/^INSTALL_PREFIX=.*$/INSTALL_PREFIX=$install_prefix/;
 	s/^PLATFORM=.*$/PLATFORM=$target/;
 	s/^OPTIONS=.*$/OPTIONS=$options/;
+	my $argvstring = "(".join(", ", map { quotify("perl", $_) } @argvcopy).")";
 	s/^CONFIGURE_ARGS=.*$/CONFIGURE_ARGS=$argvstring/;
 	if ($cross_compile_prefix)
 		{
@@ -2384,3 +2362,16 @@ EOF
 	    print "    },\n";
 	}
 	}
+
+sub quotify {
+    my %processors = (
+	perl    => sub { my $x = shift;
+			 $x =~ s/([\\\$\@"])/\\$1/g;
+			 return '"'.$x.'"'; },
+	);
+    my $for = shift;
+    my $processor =
+	defined($processors{$for}) ? $processors{$for} : sub { shift; };
+
+    map { $processor->($_); } @_;
+}