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{% skip_file unless flag?(:linux) %}
require "spec"
require "syscall"
private module TestSyscall
Syscall.def_syscall pipe2, Int32, pipefd : Int32[2]*, flags : Int32
Syscall.def_syscall write, Int32, fd : Int32, buf : UInt8*, count : LibC::SizeT
Syscall.def_syscall read, Int32, fd : Int32, buf : UInt8*, count : LibC::SizeT
Syscall.def_syscall close, Int32, fd : Int32
end
describe Syscall do
it "can call into the system successfully" do
pair = uninitialized Int32[2]
TestSyscall.pipe2(pointerof(pair), 0).should eq(0)
str = "Hello"
TestSyscall.write(pair[1], str.to_unsafe, LibC::SizeT.new(str.bytesize)).should eq(str.bytesize)
buf = Bytes.new(64)
TestSyscall.read(pair[0], buf.to_unsafe, LibC::SizeT.new(buf.size)).should eq(str.bytesize)
String.new(buf.to_unsafe, str.bytesize).should eq(str)
TestSyscall.close(pair[0]).should eq(0)
TestSyscall.close(pair[1]).should eq(0)
end
end
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