ARMENGAU@FRECP12.BITNET (Joel Armengaud) (04/09/90)
How can I get the long file names on an HPFS partition ?
When I use DosFindFirst, increasing the FILEFINDBUF structure, it doesn't
work... Do I have to put a non-zero value in the last argument,
documented as "Reserved" ?
-Joel Armengauddbaum@camilla.East.Sun.COM (Derek Baum - Sun PC Distributed Systems) (04/10/90)
In article <90098.181854ARMENGAU@FRECP12.BITNET> ARMENGAU@FRECP12.BITNET (Joel Armengaud) writes: >How can I get the long file names on an HPFS partition ? >When I use DosFindFirst, increasing the FILEFINDBUF structure, it doesn't >work... Do I have to put a non-zero value in the last argument, >documented as "Reserved" ? You should not need to increase sizeof FILEFINDBUF.achName, it was increased to CCHMAXPATHCOMP (255) with OS|2 1.2. Check you are using new 1.2 headers. The documentation states that the maximum filename that can be retrieved by DosFindFirst() is 13 bytes (8.3 + null). To retrieve a longer filename, you must use DosFindFirst2(). This is not entirely true. Long filenames can be retrieved using DosFindFirst() if the LONGNAMES bit is set in the executable header. This can be done with the SDK 1.2 markexe utility: markexe lfns program.exe. DosFindFirst2() works regardless of the setting of LONGNAMES bit, and in addition allows the retrieval of selected extended attributes. However, its use will prevent your application from running on OS| 1.1... unless you selectively run-time dynamic link to DosFindFirst2() -- UGGH! DosFindFirst2 was unnecessary, it *should* have used the reserved parameter in DosFindFirst()! OS|2 2.0 fixes this bug :-) -- Derek Baum consulting at: Sun Microsystems Internet: dbaum@East.Sun.COM (508)671-0456 UUCP: ...!sun!suneast!dbaum
phg@cs.brown.edu (Peter H. Golde) (04/10/90)
In article <90098.181854ARMENGAU@FRECP12.BITNET> ARMENGAU@FRECP12.BITNET (Joel Armengaud) writes: >How can I get the long file names on an HPFS partition ? >When I use DosFindFirst, increasing the FILEFINDBUF structure, it doesn't >work... Do I have to put a non-zero value in the last argument, >documented as "Reserved" ? You have to set a special NEWFILES bit in the .EXE to gain access to the long file names. This can be done at link time with the word NEWFILES after the name of the file and app types in the NAME statement. Or you can modify it after the fact; Microsoft C 6.0 had an EXEMOD utility to do it, and the 1.2 toolkit probably has a way to do it as well, though I don't know for sure. Should be real easy to cobble one together yourself, too. This seems like a stupid way to do it, but I guess it was done so that stupid 1.1 programs which do DosFindFirsts won't crash when run on an HPFS system. Pity we have to put up with goofiness like this, but better than killing old programs (even if they were written wrong). --Peter Golde
t-willb@microsoft.UUCP (Wiliam BONNER) (04/12/90)
In article <90098.181854ARMENGAU@FRECP12.BITNET>, ARMENGAU@FRECP12.BITNET (Joel Armengaud) writes: > How can I get the long file names on an HPFS partition ? > When I use DosFindFirst, increasing the FILEFINDBUF structure, it doesn't > work... Do I have to put a non-zero value in the last argument, > documented as "Reserved" ? The way to get long filenames in OS/2 1.2 is to use the DosFindFirst2 function instead of the DosFindFirst function. Actually, I just realized that my last program to use the findfirst/findnext functions worked fine with long filenames, and I used the older version. I am using the 1.2 SDK and C 6.0 though. Wim.
smeans@microsoft.UUCP (Scott MEANS) (04/12/90)
In article <90098.181854ARMENGAU@FRECP12.BITNET> ARMENGAU@FRECP12.BITNET (Joel Armengaud) writes: >How can I get the long file names on an HPFS partition ? The way to notify the system that your app can cope with long filenames is rather obscure, but what you need to do is add the NEWFILES keyword to your .def file. Here is a sample def file: NAME LONGAPP NEWFILES DESCRIPTION 'App that deals with HPFS file names' Basically this just sets a bit in your exehdr, and if you have the markexe utility you can set this bit on any exe you want with the command: markexe lfns appname.exe (Caution: if the app doesn't really deal with long filenames this will probably cause some undesired effects, but it usually doesn't hurt too much to experiment.) -- /\/\ //\/\\ \> </ S/ \eans
ballard@cheddar.cc.ubc.ca (Alan Ballard) (04/12/90)
In article <54035@microsoft.UUCP> t-willb@microsoft.UUCP (Wiliam BONNER) writes: >The way to get long filenames in OS/2 1.2 is to use the DosFindFirst2 >function instead of the DosFindFirst function. The important thing isn't whether you use DosFindFirst or DosFindFirst2, but whether the calling program is marked as "HPFS-aware". There is a new flag in the EXE file header that indicates whether the program is prepared to deal with long file names. This flag can ben set with a grungy little program that patches the header (several are floating around on various systems...), or with the new toolkit, by a specification in the DEF file. Alan Ballard | Internet: Alan_Ballard@mtsg.ubc.ca University Computing Services | Bitnet: USERAB1@UBCMTSG University of British Columbia | Phone: 604-228-3074 Vancouver B.C. Canada V6R 1W5 | Fax: 604-228-5116