diff options
Diffstat (limited to 'lib/dtas')
| -rw-r--r-- | lib/dtas/pipe.rb | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/lib/dtas/pipe.rb b/lib/dtas/pipe.rb index 58d926c..4c3203d 100644 --- a/lib/dtas/pipe.rb +++ b/lib/dtas/pipe.rb @@ -1,10 +1,6 @@ # Copyright (C) 2013-2019 all contributors <dtas-all@nongnu.org> # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt> # frozen_string_literal: true -begin - require 'sleepy_penguin' -rescue LoadError -end require_relative '../dtas' require_relative 'writable_iter' require_relative 'nonblock' @@ -14,6 +10,11 @@ class DTAS::Pipe < DTAS::Nonblock # :nodoc: include DTAS::WritableIter attr_accessor :sink + if RUBY_PLATFORM =~ /linux/i && File.readable?('/proc/sys/fs/pipe-max-size') + F_SETPIPE_SZ = 1031 + F_GETPIPE_SZ = 1032 + end + def self.new _, w = rv = pipe w.writable_iter_init @@ -21,13 +22,16 @@ class DTAS::Pipe < DTAS::Nonblock # :nodoc: end def pipe_size=(nr) - defined?(SleepyPenguin::F_SETPIPE_SZ) and - fcntl(SleepyPenguin::F_SETPIPE_SZ, nr) + fcntl(F_SETPIPE_SZ, nr) if defined?(F_SETPIPE_SZ) + rescue Errno::EINVAL # old kernel + rescue Errno::EPERM + # resizes fail if Linux is close to the pipe limit for the user + # or if the user does not have permissions to resize end def pipe_size - fcntl(SleepyPenguin::F_GETPIPE_SZ) - end if defined?(SleepyPenguin::F_GETPIPE_SZ) + fcntl(F_GETPIPE_SZ) + end if defined?(F_GETPIPE_SZ) # avoid syscall, we never change IO#nonblock= directly def nonblock? |