Quoth Gary Kline on Saturday, 19 February 2011: > On Sat, Feb 19, 2011 at 03:52:40PM -0800, Chip Camden wrote: > > Quoth Gary Kline on Saturday, 19 February 2011: > > > Need help findind a way of using existing unix utilities to diplay > > > chunks of N lines of a text files. Here N <= the number of lines in > > > the file. > > > > > > For instance, say that my xterm/console/"Konsole" is 80x53 lines. > > > My text file is around 200 lines long and I want to use more or less > > > or some GUI pager to display only 15 lines at one time. Tapping the > > > space bar would display another 15 lines and so on until EOF. Is > > > there a way of doing with with flags of the existing /usr/bin/less > > > or is there some other pager that I can build? > > > > > > thanks, > > > > > > gary > > > > > > > > > > > > -- > > > Gary Kline kl...@thought.org http://www.thought.org Public Service > > > Unix > > > Journey Toward the Dawn, E-Book: http://www.thought.org > > > The 7.98a release of Jottings: http://jottings.thought.org > > > > > > _______________________________________________ > > > freebsd-questions@freebsd.org mailing list > > > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > > > To unsubscribe, send any mail to > > > "freebsd-questions-unsubscr...@freebsd.org" > > > > The -z option is supposed to do this: > > > > less -z15 file.txt > > > > But it appears to work only on the second and successive pages. > > > > Oh. So _that's_ why. I tried less -m 15 [because the man pages > sais z=N; i just tried what you did with -z15. Full page first > time, 15 lines each spacebar thereafter. > > Zank you, Sir Chip.. Anybody else? I'm loathe to use anything gui, > but here's where I'll be happy w ith something GUI THat i can > squeeze my "15" or small-n lines' worth into. Can'y believe that > there is nothing for all theses years.... I mean, geewhiz! > Any idea where I Should look in ports or how to google this? > > > gary > > > > > -- > > Sterling (Chip) Camden | sterl...@camdensoftware.com | 2048D/3A978E4F > > http://chipsquips.com | http://camdensoftware.com | http://chipstips.com > > > > -- > Gary Kline kl...@thought.org http://www.thought.org Public Service Unix > Journey Toward the Dawn, E-Book: http://www.thought.org > The 7.98a release of Jottings: http://jottings.thought.org > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Is this sort of what you're looking for?
#!/usr/bin/env ruby
require 'optparse'
pagesize = 15
optparse = OptionParser.new do |opts|
opts.banner = 'usage: npg [-n pagesize] file...'
opts.on('-n', '--numlines pagesize', 'Specify page size in number of lines')
do |n|
pagesize = n
end
end
begin
optparse.parse!
rescue OptionParser::InvalidOption, OptionParser::MissingArgument => e
puts e
puts optparse
exit 1
end
loop do
pagesize.times do
if line = gets
puts line
else
exit
end
end
print "More..."
STDIN.getc
end
--
Sterling (Chip) Camden | sterl...@camdensoftware.com | 2048D/3A978E4F
http://chipsquips.com | http://camdensoftware.com | http://chipstips.com
pgp7vylFQRVHA.pgp
Description: PGP signature
