From 44d9110194da21397c5b41c7595daf67708a20a3 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Wed, 4 Sep 2013 21:40:23 +0100
Subject: [PATCH] New features: * random-word: -F<n> option for using only
 first <n> lines of source file.

---
 debian/changelog    |  3 +++
 scripts/random-word | 14 +++++++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/debian/changelog b/debian/changelog
index 0fa99b3..e0dfcd2 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,5 +1,8 @@
 chiark-utils (4.2.1~~iwj1) unstable; urgency=low
 
+  New features:
+  * random-word: -F<n> option for using only first <n> lines of source file.
+
   Code cleanups:
   * random-word: Some perl-mode emacs formatting glitch workarounds.
   * random-word: use strict; -w.
diff --git a/scripts/random-word b/scripts/random-word
index 427e4d0..649af15 100755
--- a/scripts/random-word
+++ b/scripts/random-word
@@ -25,6 +25,7 @@ use POSIX;
 our $want= 1;
 our $filename= "/usr/share/dict/words";
 our @randfile= ("/dev/urandom", "/dev/random");
+our $filemaxlen;
 
 sub fail ($) { die "random-word: $_[0]\n"; }
 open D, ">/dev/null" or fail("open /dev/null: $!");
@@ -37,6 +38,8 @@ while (@ARGV && $ARGV[0] =~ m/^\-/) {
 	$want= $1;
     } elsif (m/^\-f/ && length > 2) {
 	$filename= $'; #';
+    } elsif (m/^\-F(\d+)$/) {
+	$filemaxlen= $1;
     } elsif (m/^\-r/ && length > 2) {
 	@randfile= ($'); #');
     } elsif (m/^\-D$/) {
@@ -66,7 +69,16 @@ $r->autoflush(0);
 our $w= new IO::File $filename, 'r';
 $w or fail("cannot open $filename: $!");
 debug("open $filename ok");
-our @words= <$w>;
+our @words;
+if (defined $filemaxlen) {
+    while (@words < $filemaxlen) {
+	my $l = <$w>;
+	last unless defined $l;
+	push @words, $l;
+    }
+} else {
+    @words= <$w>;
+}
 $w->error and fail("cannot read $filename: $!");
 debug("read $filename ok");
 
-- 
2.30.2