README.OS2

The OS/2 support is from Kyosuke TOKORO <tokoro@mx5.harmonix.ne.jp> (or
maybe NBG01720@nifty.ne.jp).

Thanks!

Avery

P.S. There's a great chance that I might have broken it since then.  Send me
patches if you want it back.  Also send me patches if you want it to work on
non-Linux Unix systems - it should be pretty easy to do.



netselect.c
~~~~~~~~~~~
o Removed htons() to set the `ip_len' element.

    This function causes the netselect.exe to hung.  It is not required
  to set the `ip_len' on the OS/2 systems (and on the BSD systems, I
  think.)


o Added code to check the `EHOSTUNREACH' error and some others.	 They may
  be returned from sendto().


o Added _response() to expand a response file (@filename, the file filename
  contains a list of arguments, one per line).

    `netselect $(cat foo)' does not work when the shell is CMD.EXE.  Type
  `netselect @foo' instead.

    _response() is an orignail function supported by the `emx.'


o Switch the mode of an unnamed pipe to binary from text (default).

    On the OS/2 and the Windows operating systems, if pipe handle has been
  created for reading in text mode, CR/LF pairs are translated to newline
  characters and a Ctrl-Z character is discarded.  And, if pipe has been
  created for writing in text mode, newline characters are translated to
  CR/LF pairs.	These translations cause problem.


netinet/ip.h
~~~~~~~~~~~~
    I don't know why the netselect has own `netinet/' headers.
    May I compile the netselect with including standard headers in `/usr
  /include/netinet/ (on the Debian GNU linux systems)' directory?

    I compiled for the OS/2 systems with including the netselect's own
  `netinet/' headers, instead of the headers in `/emx/include/netinet/'
  directory.

o The size of network messages is restricted to 32767 bytes.  This is a
  limitation of IBM TCP/IP for OS/2.


Makefile
~~~~~~~~
o To build OS/2 binary, type:
	make OS2=1


o To install on OS/2 system, type:
	make OS2=1 install

    GNU fileutil is required.  But, `install -s netselect.exe' does not
  work correctly.  Because the OS/2 executable file is not in the a.out
  format.  `emxbind -s -b' will be executed to delete symbols and to
  create bound an `.exe' file.


o `# (comment)' characters are moved to the top of each line.

    When there is a tab character at the top of the line, GNU make executes
  the shell.  When the shell is `/bin/sh' or something ported from unix.
    a `#' starts a comment that extends to the end of the line.	 But, the
  native OS/2 shell (CMD.EXE) does not recognize `#' as a comment.  To
  resolve this problem, use the Makefile comments, instead of the shell
  comments.  When there is a `#' character at the top of line, GNU make
  recognizes its line as own comment, and does not execute shell.


o fork() works only in programs linked by ld.  It does not work in programs
  linked by LINK386 (OS/2 native linker).  This is a limitation of the
  emx.


debian-ftp-mirrors
~~~~~~~~~~~~~~~~~~
o Added Debian mirrors in Japan.