Extract the version number from the changelog

.gitignore

@@ -1,6 +1,7 @@
 *_del.h
 tld_serv.h
 servers_charset.h
+version.h
 
 Makefile.depend
 *.o

Makefile

@@ -69,6 +69,9 @@ mkpasswd: $(mkpasswd_OBJECTS)
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(mkpasswd_LDADD) $(LIBS)
 
 ##############################################################################
+version.h: debian/changelog make_version_h.pl
+	$(PERL) -w make_version_h.pl $< > $@
+
 as_del.h: as_del_list make_as_del.pl
 	$(PERL) -w make_as_del.pl < $< > $@
 

config.h

@@ -1,6 +1,3 @@
-/* Program version */
-#define VERSION "5.1.1"
-
 /* Configurable features */
 
 /* Always hide legal disclaimers */

make_version_h.pl

@@ -0,0 +1,23 @@
+#!/usr/bin/perl
+
+use warnings;
+use strict;
+
+my $changelog = $ARGV[0] or die "Usage: $0 debian/changelog\n";
+
+open(my $fh, '<', $changelog) or die "open($changelog): $!";
+my $line = <$fh>;
+close($fh) or die "close($changelog): $!";
+
+my ($ver) = $line =~ /^whois \s+ \( ( [^\)]+ ) \) \s+ \S+/x;
+die "Version number not found in $changelog!\n" if not $ver;
+
+$ver =~ s/ ( ~deb\d+.* | ubuntu\d+ ) $//x;
+
+# The version number must not deviate from this format or the -V option
+# to RIPE-like servers will break. If needed, update the previous regexp.
+die "Invalid version number in $changelog!\n"
+	unless $ver =~ /^ \d+\.\d+ ( \.\d+ )? $/x;
+
+print qq|#define VERSION "$ver"\n|;
+

mkpasswd.c

@@ -45,6 +45,7 @@
 #endif
 
 /* Application-specific */
+#include "version.h"
 #include "utils.h"
 
 /* Global variables */

whois.c

@@ -39,6 +39,7 @@
 #endif
 
 /* Application-specific */
+#include "version.h"
 #include "data.h"
 #include "whois.h"
 #include "utils.h"