pdksh vs. mksh info [was: Re: Apparently,
csh programming is considered harmful.]
Jurjen Middendorp
jurjenm at stack.nl
Sun Dec 16 23:43:06 PST 2007
On Sun, Dec 16, 2007 at 11:34:50PM -0500, Tom McLaughlin wrote:
>On Sun, 2007-12-16 at 22:26 -0500, Chuck Robey wrote:
>> 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.
>
>I've never used ksh93 so I really can't say. There is a NOTES file
>included with pdksh which gives a starter. I created this port a few
>years ago because of some random issue I've long since forgotten with
>pdksh on my FreeBSD box which didn't happen on my OpenBSD box.
>
>tom
I never used pdksh, but am using ksh93 for quite a while now and have used
bash, too. For some reason i like it better than bash, the vi mode is a bit
better somehow, it feels alot sturdier. It doesn't have those special
variables like $! and !! i believe, but it has alot of neat features like
basic network programming, lots of parameter expansion stuff and is just a
very nice shell :)
-jurjen
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