add bsd license

trunk/ripnews/news/newsrc.rb

@@ -1,14 +1,21 @@
-#################################
-#
-# $Dwarf: newsrc.rb,v 1.10 2002/08/01 11:50:09 ward Exp $
+# $Dwarf: newsrc.rb,v 1.11 2002/11/05 09:33:41 ward Exp $
 # $Source$
+
 #
-# newsrc.rb
-# ported from Perl code by Ward Wouts
+# Copyright (c) 2002, 2003 Ward Wouts <ward@wouts.nl>
 #
-# (C) 2001, Ward Wouts
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #
-#################################
 
 require "set/intspan"
 
@@ -78,6 +85,7 @@ def save
 	save_as(@newsrc["file"])
 end
 
+# this is not thread safe!
 def save_as(file)
 	if FileTest.exists?("#{file}")
 		begin
@@ -100,6 +108,46 @@ def save_as(file)
 	newsrc.close
 end
 
+def save_group(group)
+	unless @newsrc.has_key?("file")
+		@newsrc["file"] = "#{$ENV['HOME']}/.newsrc"
+	end
+	save_as(@newsrc["file"], group)
+end
+
+# this should be thread safe
+def save_group_as(file, group)
+	if FileTest.exists?("#{file}")
+		if ( ! File.copy(file, "#{file}.bak") )
+			print "Can't copy #{file} to #{file}.bak: #{$!}\n"
+		end
+	end
+	begin
+		newsrc = File.new(file, "r+").flock(File::LOCK_EX)
+	rescue
+		print "Can't open ${file}: #{$!}\n"
+		exit
+	end
+
+	# read file
+	lines = newsrc.readlines
+
+	# pointer -> 0
+	newsrc.rewind
+
+	# write read stuff & replace group
+	for line in lines
+		if line =~ /^#{group}(:|!)/
+			newsrc.print line
+		else
+			newsrc.print format(group)
+		end
+	end
+
+	newsrc.flock(File::LOCK_UN)	# what's the right order here?
+	newsrc.close
+end
+
 def format(group)
 	name = group["name"]
 	sub = group["subscribed"] ? ':' : '!'
@@ -383,6 +431,8 @@ end # module
 # [x] parse   # parses a single line from a newsrc file
 # [x] save
 # [x] save_as
+# [ ] save_group
+# [ ] save_group_as
 # [x] format
 # [x] export_rc
 # [ ] _dump	# Formats a Newsrc object to a string.  Used for testing