Fcntl loads the constants defined in the system's
<fcntl.h> C header file, and used with both the fcntl(2) and open(2) POSIX system calls.
- To perform a fcntl(2) operation, use IO::fcntl.
- To perform an open(2) operation, use IO::sysopen.
The set of operations and constants available depends upon specific operating system. Some values listed below may not be supported on your system.
See your fcntl(2) man page for complete details.
Add this line to your application's Gemfile:
And then execute:
Or install it yourself as:
$ gem install fcntl
/tmp/tempfile as a write-only file that is created if it doesn't
require 'fcntl' fd = IO.sysopen('/tmp/tempfile', Fcntl::O_WRONLY | Fcntl::O_EXCL | Fcntl::O_CREAT) f = IO.open(fd) f.syswrite("TEMP DATA") f.close
Get the flags on file
m = s.fcntl(Fcntl::F_GETFL, 0)
Set the non-blocking flag on
f in addition to the existing flags in
After checking out the repo, run
bin/setup to install dependencies. Then, run
rake test to run the tests. You can also run
bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run
bundle exec rake install. To release a new version, update the version number in
version.rb, and then run
bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the
.gem file to rubygems.org.
Bug reports and pull requests are welcome on GitHub at https://github.com/ruby/fcntl.
The gem is available as open source under the terms of the 2-Clause BSD License.