# File lib/phusion_passenger/utils.rb, line 992 def close_on_exec! fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC) end
Writes all of the strings in the components
array into the
given file descriptor using the +writev()+ system call. Unlike IO#write,
this method does not require one to concatenate all those strings into a
single buffer in order to send the data in a single system call. Thus, writev is a great way to perform
zero-copy I/O.
Unlike the raw writev() system call, this method ensures that all given data is written before returning, by performing multiple writev() calls and whatever else is necessary.
io.writev(["hello ", "world", "\n"])
# File lib/phusion_passenger/utils.rb, line 968 def writev(components) return PhusionPassenger::NativeSupport.writev(fileno, components) end
Like writev, but accepts two arrays. The data is written in the given order.
io.writev2(["hello ", "world", "\n"], ["another ", "message\n"])
# File lib/phusion_passenger/utils.rb, line 975 def writev2(components, components2) return PhusionPassenger::NativeSupport.writev2(fileno, components, components2) end
Like writev, but accepts three arrays. The data is written in the given order.
io.writev3(["hello ", "world", "\n"], ["another ", "message\n"], ["yet ", "another ", "one", "\n"])
# File lib/phusion_passenger/utils.rb, line 985 def writev3(components, components2, components3) return PhusionPassenger::NativeSupport.writev3(fileno, components, components2, components3) end