toma@ozdaltx.UUCP (Tom Armistead) (08/27/90)
Does anyone know where I can find any information on how to write a Unix
command shell (like sh or ksh)?
I have access to ksh and bash source, but don't want to spend the rest of
my life trying to figure those out.
I would like to find out how the environment space is handled. What, if
anything, needs to be done to siatisfy the kernel and/or the C library
functions like getenv(), putenv() and popen(). And probally a few million
other things that I haven't thought of.
Just to answer any "How come?" questions. "I don't have any real reasons,
just thought it might be fun..."
Any help would be greatly appreciated!!!
Tom
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{uunet,smu,ames}!sulaco!ozdaltx!toma (Tom Armistead @ Garland, Texas)
{mic,void,egsner}!ozdaltx!tomabrister@decwrl.dec.com (James Brister) (08/27/90)
On 27 Aug 90 02:24:03 GMT, toma@ozdaltx.UUCP (Tom Armistead) said: > Does anyone know where I can find any information on how to write a Unix > command shell (like sh or ksh)? Take a look at "Advanced Unix Programming" by Marc Rochkind. He does exactly this. James -- James Brister brister@decwrl.dec.com DEC Western Software Lab., Palo Alto, California. .....!decwrl!brister
news@macuni.mqcc.mq.oz (USENET News System) (08/28/90)
In article <6909@ozdaltx.UUCP> toma@ozdaltx.UUCP (Tom Armistead) writes: > >Does anyone know where I can find any information on how to write a Unix >command shell (like sh or ksh)? There isn't any really good information around on this sort of stuff (I mean specifically for writing shells), not that I can find anyway. You can find interesting concepts in "Advanced UNIX programming" by Marc Rochind. There is a whole section in there on how to write a simple UNIX shell. >I have access to ksh and bash source, but don't want to spend the rest of >my life trying to figure those out. Yup! >I would like to find out how the environment space is handled. What, if >anything, needs to be done to siatisfy the kernel and/or the C library >functions like getenv(), putenv() and popen(). And probally a few million >other things that I haven't thought of. The best thing is to go through the UNIX manuals (man 2 intro etc.) and just find out what you can. I have had a long interest in UNIX shells, and have implemented some simple ones myself. What sort of a shell are you trying to put together? Regards, Martin. Martin Foord | AARNET: martin@macadam.mqcs.mq.oz.au Systems Administrator | UUCP: ...!uunet!macadam.mqcs.mq.oz.au!martin Macquarie University | Computing Science Australia | (02) 805 8940
bernie@DIALix.UUCP (Bernd Felsche) (08/28/90)
In article <6909@ozdaltx.UUCP> toma@ozdaltx.UUCP (Tom Armistead) writes: > >Does anyone know where I can find any information on how to write a Unix >command shell (like sh or ksh)? > A useful shell design is discussed in "Advanced UNIX Programming" by Marc Rochkind (Prentice Hall, Inc.) ISBN 0-13-011818-4 and ISBN 0-13-011800-1 {PBK.} 01 [rest of article deleted] bernie