1 files changed, 73 insertions, 0 deletions

diff --git a/src/lib/libcrypto/util/mklink.pl b/src/lib/libcrypto/util/mklink.pl
new file mode 100644
index 0000000000..182732d959
--- /dev/null
+++ b/src/lib/libcrypto/util/mklink.pl
@@ -0,0 +1,73 @@
+#!/usr/local/bin/perl
+
+# mklink.pl
+
+# The first command line argument is a non-empty relative path
+# specifying the "from" directory.
+# Each other argument is a file name not containing / and
+# names a file in the current directory.
+#
+# For each of these files, we create in the "from" directory a link
+# of the same name pointing to the local file.
+#
+# We assume that the directory structure is a tree, i.e. that it does
+# not contain symbolic links and that the parent of / is never referenced.
+# Apart from this, this script should be able to handle even the most
+# pathological cases.
+#
+
+use Cwd;
+
+my $from = shift;
+my @files = @ARGV;
+
+my @from_path = split(/[\\\/]/, $from);
+my $pwd = getcwd();
+chomp($pwd);
+my @pwd_path = split(/[\\\/]/, $pwd);
+
+my @to_path = ();
+
+my $dirname;
+foreach $dirname (@from_path) {
+
+    # In this loop, @to_path always is a relative path from
+    # @pwd_path (interpreted is an absolute path) to the original pwd.
+
+    # At the end, @from_path (as a relative path from the original pwd)
+    # designates the same directory as the absolute path @pwd_path,
+    # which means that @to_path then is a path from there to the original pwd.
+
+    next if ($dirname eq "" || $dirname eq ".");
+
+    if ($dirname eq "..") {
+        @to_path = (pop(@pwd_path), @to_path);
+    } else {
+        @to_path = ("..", @to_path);
+        push(@pwd_path, $dirname);
+    }
+}
+
+my $to = join('/', @to_path);
+
+my $file;
+$symlink_exists=eval {symlink("",""); 1};
+foreach $file (@files) {
+    my $err = "";
+    if ($symlink_exists) {
+        unlink "$from/$file";
+        symlink("$to/$file", "$from/$file") or $err = " [$!]";
+    } else {
+        unlink "$from/$file"; 
+        open (OLD, "<$file") or die "Can't open $file: $!";
+        open (NEW, ">$from/$file") or die "Can't open $from/$file: $!";
+        binmode(OLD);
+        binmode(NEW);
+        while (<OLD>) {
+            print NEW $_;
+        }
+        close (OLD) or die "Can't close $file: $!";
+        close (NEW) or die "Can't close $from/$file: $!";
+    }
+    print $file . " => $from/$file$err\n";
+}