diff options
Diffstat (limited to 'lib/un.rb')
-rw-r--r-- | lib/un.rb | 27 |
1 files changed, 27 insertions, 0 deletions
@@ -214,6 +214,33 @@ def touch end ## +# Wait until the file becomes writable. +# +# ruby -run -e wait_writable -- [OPTION] FILE +# + +def wait_writable + setup("n:w:v") do |argv, options| + verbose = options[:verbose] + n = options[:n] and n = Integer(n) + wait = (wait = options[:w]) ? Float(wait) : 0.2 + argv.each do |file| + begin + open(file, "r+b") + rescue Errno::ENOENT + break + rescue Errno::EACCES => e + raise if n and (n -= 1) <= 0 + puts e + STDOUT.flush + sleep wait + retry + end + end + end +end + +## # Display help message. # # ruby -run -e help [COMMAND] |