Re: C/C++ File Locking

If IFS stream file, check out open() function's O_SHARE_NONE flag.
If native (library) file system, check out ALCOBJ command.

Hth, Elvis

Celebrating 11-Years of SQL Performance Excellence on IBM i, i5/OS and
OS/400
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-----Original Message-----
Subject: [C400-L] C/C++ File Locking

I am new to the iSeries but not C/C++. I am porting a program that runs
on multiple platforms. This program may have several instances running
concurrently but each program shares on data file. My issue is what
function do I use to lock the file so that other apps can not read/write
this file while it is being locked by another process. On windows I
used CreateFile() and on UNIX I used Flock(). I am looking for
something similar or that will at least produce the same results. I
have attempted modifying the share permissions in the CL but this locks
the file for the entire run of the program and not only when this file
is open.


Thanks,

Edgar Gillock
ed_gillock@xxxxxx



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