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- Newsgroups: comp.os.msdos.programmer
- Path: sparky!uunet!utcsri!skule.ecf!torn!news.ccs.queensu.ca!mast.queensu.ca!dmurdoch
- From: dmurdoch@mast.queensu.ca (Duncan Murdoch)
- Subject: Re: Undocumented commands for MSDOS
- Message-ID: <dmurdoch.286.722101581@mast.queensu.ca>
- Lines: 22
- Sender: news@knot.ccs.queensu.ca (Netnews control)
- Organization: Queen's University
- References: <1duhj3INNa9c@golem.wcc.govt.nz> <1992Nov17.104222.6548@goya.uu.es> <1992Nov18.040449.20732@vpnet.chi.il.us>
- Date: Wed, 18 Nov 1992 15:46:21 GMT
-
- In article <1992Nov18.040449.20732@vpnet.chi.il.us> cgordon@vpnet.chi.il.us (gordon hlavenka) writes:
- >Hmmm... I just shelled out and tried "truename pkunzip.exe". It
- >returned "D:\TELIX\PKUNZIP.EXE" although pkunzip is actually in
- >C:\UTIL. Next I tried "truename nosuch.fil" and got
- >"D:\TELIX\NOSUCH.FIL". So I guess we can see why it's undocumented :-)
-
- I think it returns a fully expanded version of a filename, usable
- below the level where SUBST works. For example, if you had tried
- echo junk >pkunzip.exe
- then you wouldn't have trashed the uncompressor, you would have created a
- new file, which on a barebones system would be D:\TELIX\PKUNZIP.EXE. If you
- happen to have "SUBST D: C:\NEVER\NEVER\LAND" in effect, then the "truename"
- won't be usable until you go below the SUBST (or get rid of it).
-
- It's still a mystery to me why this command is there. Are there any DOS
- utilities that routinely go below SUBST? Perhaps the equivalent of
- SUBST F: `truename .`
- would be handy in a batchfile. (I'll have to defer to the batch wizards to
- actually come up with a working batch file to do this.)
-
- Duncan Murdoch
- dmurdoch@mast.queensu.ca
-