95 lines
3.1 KiB
Ruby
95 lines
3.1 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require "fcntl"
|
|
require "socket"
|
|
|
|
module Utils
|
|
def self.rewrite_child_error(child_error)
|
|
error = if child_error.inner_class == ErrorDuringExecution
|
|
ErrorDuringExecution.new(child_error.inner["cmd"],
|
|
status: child_error.inner["status"],
|
|
output: child_error.inner["output"])
|
|
elsif child_error.inner_class == BuildError
|
|
# We fill `BuildError#formula` and `BuildError#options` in later,
|
|
# when we rescue this in `FormulaInstaller#build`.
|
|
BuildError.new(nil, child_error.inner["cmd"],
|
|
child_error.inner["args"], child_error.inner["env"])
|
|
elsif child_error.inner_class == Interrupt
|
|
Interrupt.new
|
|
else
|
|
# Everything other error in the child just becomes a RuntimeError.
|
|
RuntimeError.new(child_error.message)
|
|
end
|
|
|
|
error.set_backtrace child_error.backtrace
|
|
|
|
error
|
|
end
|
|
|
|
def self.safe_fork(&_block)
|
|
Dir.mktmpdir("homebrew", HOMEBREW_TEMP) do |tmpdir|
|
|
UNIXServer.open("#{tmpdir}/socket") do |server|
|
|
read, write = IO.pipe
|
|
|
|
pid = fork do
|
|
begin
|
|
ENV["HOMEBREW_ERROR_PIPE"] = server.path
|
|
server.close
|
|
read.close
|
|
write.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)
|
|
yield
|
|
rescue Exception => e # rubocop:disable Lint/RescueException
|
|
error_hash = JSON.parse e.to_json
|
|
|
|
# Special case: We need to recreate ErrorDuringExecutions
|
|
# for proper error messages and because other code expects
|
|
# to rescue them further down.
|
|
if e.is_a?(ErrorDuringExecution)
|
|
error_hash["cmd"] = e.cmd
|
|
error_hash["status"] = e.status.exitstatus
|
|
error_hash["output"] = e.output
|
|
end
|
|
|
|
write.puts error_hash.to_json
|
|
write.close
|
|
|
|
exit!
|
|
else
|
|
exit!(true)
|
|
end
|
|
end
|
|
|
|
ignore_interrupts(:quietly) do # the child will receive the interrupt and marshal it back
|
|
begin
|
|
socket = server.accept_nonblock
|
|
rescue Errno::EAGAIN, Errno::EWOULDBLOCK, Errno::ECONNABORTED, Errno::EPROTO, Errno::EINTR
|
|
retry unless Process.waitpid(pid, Process::WNOHANG)
|
|
else
|
|
socket.send_io(write)
|
|
socket.close
|
|
end
|
|
write.close
|
|
data = read.read
|
|
read.close
|
|
Process.wait(pid) unless socket.nil?
|
|
|
|
# 130 is the exit status for a process interrupted via Ctrl-C.
|
|
# We handle it here because of the possibility of an interrupted process terminating
|
|
# without writing its Interrupt exception to the error pipe.
|
|
raise Interrupt if $CHILD_STATUS.exitstatus == 130
|
|
|
|
if data && !data.empty?
|
|
error_hash = JSON.parse(data.lines.first)
|
|
|
|
e = ChildProcessError.new(error_hash)
|
|
|
|
raise rewrite_child_error(e)
|
|
end
|
|
|
|
raise "Forked child process failed: #{$CHILD_STATUS}" unless $CHILD_STATUS.success?
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|