pdksh vs. mksh info [was: Re: Apparently, csh programming is considered harmful.]

[Chuck Robey]

Tom McLaughlin wrote:
>> Now that you mention pdksh, have you tried mksh (in Ports too)?
>>
>> I've installed it and successfully run moderately large ksh scripts
>> (like the webrev(1) utility of OpenSolaris), and it is about an order of
>> magnitude smaller than pdksh here:
>>
>> % keramida at kobe:/usr/local/bin$ ls -ld mksh bash ksh
>> % -rwxr-xr-x  1 root  wheel  -  684699 Dec  9 19:51 bash
>> % -r-xr-xr-x  1 root  wheel  - 2390645 Aug 31 17:07 ksh
>> % -r-xr-xr-x  1 root  wheel  -  236202 Dec  9 18:34 mksh
>> % keramida at kobe:/usr/local/bin$ ldd mksh bash ksh
>> % mksh:
>> %         libc.so.7 => /lib/libc.so.7 (0x280ae000)
>> % bash:
>> %         libncurses.so.7 => /lib/libncurses.so.7 (0x28101000)
>> %         libintl.so.8 => /usr/local/lib/libintl.so.8 (0x28144000)
>> %         libiconv.so.3 => /usr/local/lib/libiconv.so.3 (0x28156000)
>> %         libc.so.7 => /lib/libc.so.7 (0x2824b000)
>> % ldd: ksh: not a dynamic executable
>> % keramida at kobe:/usr/local/bin$
>>
> 
> I've maintained a port of OpenBSD's pdksh for some time but I've never
> committed it.  Think of pdksh but still actively maintained.  
> 
> http://people.freebsd.org/~tmclaugh/files/openksh/openksh-4.2.shar
> 
> [tom at releng-7-fbsd tom]$ ls -al /usr/local/bin/ksh  
> -r-xr-xr-x  1 root  wheel  192032 Dec 16 18:22 /usr/local/bin/ksh*

  If you're familiar with pdksh, are you also familiar with ksh93, which 
is (I believe) Mr. Korn's own shell?  If you are, I would be interessted 
  in your opinion of the two, any comparisons you might give.