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require File.expand_path('../../../spec_helper', __FILE__)
describe "File#flock" do
before :each do
ScratchPad.record []
@name = tmp("flock_test")
touch(@name)
@file = File.open @name, "w+"
end
after :each do
@file.flock File::LOCK_UN
@file.close
rm_r @name
end
it "exclusively locks a file" do
@file.flock(File::LOCK_EX).should == 0
@file.flock(File::LOCK_UN).should == 0
end
it "non-exclusively locks a file" do
@file.flock(File::LOCK_SH).should == 0
@file.flock(File::LOCK_UN).should == 0
end
it "returns false if trying to lock an exclusively locked file" do
@file.flock File::LOCK_EX
ruby_exe(<<-END_OF_CODE, escape: true).should == "false"
File.open('#{@name}', "w") do |f2|
print f2.flock(File::LOCK_EX | File::LOCK_NB).to_s
end
END_OF_CODE
end
it "blocks if trying to lock an exclusively locked file" do
@file.flock File::LOCK_EX
out = ruby_exe(<<-END_OF_CODE, escape: true)
running = false
t = Thread.new do
File.open('#{@name}', "w") do |f2|
puts "before"
running = true
f2.flock(File::LOCK_EX)
puts "after"
end
end
Thread.pass until running
Thread.pass while t.status and t.status != "sleep"
sleep 0.1
t.kill
t.join
END_OF_CODE
out.should == "before\n"
end
it "returns 0 if trying to lock a non-exclusively locked file" do
@file.flock File::LOCK_SH
File.open(@name, "r") do |f2|
f2.flock(File::LOCK_SH | File::LOCK_NB).should == 0
f2.flock(File::LOCK_UN).should == 0
end
end
end
platform_is :solaris do
describe "File#flock on Solaris" do
before :each do
@name = tmp("flock_test")
touch(@name)
@read_file = File.open @name, "r"
@write_file = File.open @name, "w"
end
after :each do
@read_file.flock File::LOCK_UN
@read_file.close
@write_file.flock File::LOCK_UN
@write_file.close
rm_r @name
end
it "fails with EBADF acquiring exclusive lock on read-only File" do
lambda do
@read_file.flock File::LOCK_EX
end.should raise_error(Errno::EBADF)
end
it "fails with EBADF acquiring shared lock on read-only File" do
lambda do
@write_file.flock File::LOCK_SH
end.should raise_error(Errno::EBADF)
end
end
end
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