Module: Ragweed::Wraptux

Defined in:
lib/ragweed/wraptux.rb,
lib/ragweed/wraptux/threads.rb,
lib/ragweed/wraptux/wraptux.rb,
lib/ragweed/wraptux/constants.rb

Defined Under Namespace

Modules: Ptrace, Signal, ThreadInfo, Wait

Constant Summary collapse

VERSION =

:stopdoc:

'0.1.6'
LIBPATH = 
::File.expand_path(::File.dirname(__FILE__)) + ::File::SEPARATOR
PATH = 
::File.dirname(LIBPATH) + ::File::SEPARATOR
LIBS = 
Hash.new do |h, str|
  if not str =~ /^[\.\/].*/
    str = "/lib/" + str
  end
  if not str =~ /.*\.so.6$/
    str = str + ".so.6"
  end
  h[str] = DL.dlopen(str)
end
CALLS = 
Hash.new do |h, str|
  lib = proc = args = ret = nil
  lib, rest = str.split "!"
  proc, rest = rest.split ":"
  args, ret = rest.split("=") if rest
  ret ||= "0"
  raise "need proc" if not proc
  h[str] = LIBS[lib][proc, ret + args]
end
NULL = 
DL::PtrData.new(0)
SIZEOFINT = 
DL.sizeof('I')
SIZEOFLONG = 
DL.sizeof('L')

Class Method Summary collapse

Class Method Details

.getpid ⇒ Object 



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# File 'lib/ragweed/wraptux/wraptux.rb', line 72

def getpid
  CALLS["libc!getpid:=I"].call.first
end

.kill(pid, sig) ⇒ Object

kill(pid_t pid, int sig);

Raises:

  • (SystemCallError) 


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# File 'lib/ragweed/wraptux/wraptux.rb', line 66

def kill(pid, sig)
  DL.last_error = 0
  r = CALLS["libc!kill:II=I"].call(pid,sig).first
  raise SystemCallError.new("kill",DL.last_error) if r != 0
end

.libpath(*args) ⇒ Object

Returns the library path for the module. If any arguments are given, they will be joined to the end of the libray path using File.join.



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# File 'lib/ragweed/wraptux.rb', line 23

def self.libpath( *args )
  args.empty? ? LIBPATH : ::File.join(LIBPATH, args.flatten)
end

.malloc(sz) ⇒ Object 



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# File 'lib/ragweed/wraptux/wraptux.rb', line 43

def malloc(sz)
  r = CALLS["libc!malloc:L=L"].call(sz)
  return r
end

.path(*args) ⇒ Object

Returns the lpath for the module. If any arguments are given, they will be joined to the end of the path using File.join.



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# File 'lib/ragweed/wraptux.rb', line 31

def self.path( *args )
  args.empty? ? PATH : ::File.join(PATH, args.flatten)
end

.ptrace(request, pid, addr, data) ⇒ Object

long ptrace(enum __ptrace_request request, pid_t pid, void *addr, void *data);

Raises:

  • (SystemCallError) 


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# File 'lib/ragweed/wraptux/wraptux.rb', line 32

def ptrace(request, pid, addr, data)
  DL.last_error = 0
  r = CALLS["libc!ptrace:IIII=I"].call(request, pid, addr, data).first
  raise SystemCallError.new("ptrace", DL.last_error) if r == -1 and DL.last_error != 0

  case request
  when Ptrace::PEEK_TEXT, Ptrace::PEEK_DATA
    return r
  end
end

.require_all_libs_relative_to(fname, dir = nil) ⇒ Object

Utility method used to require all files ending in .rb that lie in the directory below this file that has the same name as the filename passed in. Optionally, a specific directory name can be passed in such that the filename does not have to be equivalent to the directory.



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# File 'lib/ragweed/wraptux.rb', line 40

def self.require_all_libs_relative_to( fname, dir = nil )
  dir ||= ::File.basename(fname, '.*')
  search_me = ::File.expand_path(
      ::File.join(::File.dirname(fname), dir, '**', '*.rb'))
  
  Dir.glob(search_me).sort.each {|rb| require rb}
  # require File.dirname(File.basename(__FILE__)) + "/#{x}"

end

.version ⇒ Object

Returns the version string for the library.



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# File 'lib/ragweed/wraptux.rb', line 15

def self.version
  VERSION
end

.wait ⇒ Object

wait(int *status);

Raises:

  • (SystemCallError) 


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# File 'lib/ragweed/wraptux/wraptux.rb', line 49

def wait
  status = ("\x00"*SIZEOFINT).to_ptr.to_i
  r = CALLS["libc!wait:I=I"].call(status).first
  raise SystemCallError.new("wait", DL.last_error) if r == -1
  self.continue # continue with the ptrace at this point
  return status.to_s(SIZEOFINT).unpack('i_').first
end

.waitpid(pid, opt = 1) ⇒ Object

waitpid(pid_t pid, int *stat_loc, int options);

Raises:

  • (SystemCallError) 


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# File 'lib/ragweed/wraptux/wraptux.rb', line 58

def waitpid(pid, opt=1)
  pstatus = ("\x00"*SIZEOFINT).to_ptr
  r = CALLS["libc!waitpid:IPI=I"].call(pid, pstatus, opt).first
  raise SystemCallError.new("waitpid", DL.last_error) if r == -1
  return [r, pstatus.to_s(SIZEOFINT).unpack('i_').first]
end