Method: MemoryIO::Process#initialize

Defined in:
lib/memory_io/process.rb

#initialize(pid) ⇒ Process

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

TODO:

Support MacOS

TODO:

Support Windows

Note:

This class only supports procfs-based system. i.e. /proc is mounted and readable.

Create process object from pid.

Parameters:

  • pid (Integer) —

    Process id.

Raises:

  • (Errno::ENOENT) 


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# File 'lib/memory_io/process.rb', line 22

def initialize(pid)
  @pid = pid
  @mem = "/proc/#{pid}/mem"
  # check permission of '/proc/pid/mem'
  @perm = MemoryIO::Util.file_permission(@mem)
  # TODO: raise custom exception
  raise Errno::ENOENT, @mem if perm.nil?
  # FIXME: use logger
  warn(<<-EOS.strip) unless perm.readable? || perm.writable?
You have no permission to read/write this process.

Check the setting of /proc/sys/kernel/yama/ptrace_scope, or try
again as the root user.

To enable attach another process, do:

$ echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
  EOS
end