gets does not block (STDOUT.flush issue?)

[Ivan B]

File: test.rb


STDOUT.sync=true

puts "File exists. Are you sure?"
STDOUT.flush
answer=gets.chomp
puts answer

executing this file with any parameters (e.g. ./test.rb bla) yields
this:

[:~/ruby]$ ./test.rb bla
File exists. Are you sure?
/test.rb:9:in `gets': No such file or directory - "bla" (Errno::ENOENT)
from ./test.rb:9
[:~/ruby]$

What gives?!

 

[Brian Candler]

STDOUT.sync=true

puts "File exists. Are you sure?"
STDOUT.flush
answer=gets.chomp
puts answer

executing this file with any parameters (e.g. ./test.rb bla) yields
this:

[:~/ruby]$ ./test.rb bla
File exists. Are you sure?
./test.rb:9:in `gets': No such file or directory - "bla" (Errno::ENOENT)
from ./test.rb:9
[:~/ruby]$

What gives?!

You need:

answer=$stdin.gets.chomp

Ohterwise, gets tries to read from file(s) whose name(s) are given on the
command line.