Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!amdcad!ames!ptsfa!ihnp4!homxb!mtuxo!mtune!westmark!dave
From: dave@westmark.UUCP (Dave Levenson)
Newsgroups: comp.sys.ibm.pc,comp.lang.c
Subject: Re: MS C open file limit on PC
Message-ID: <211@westmark.UUCP>
Date: Tue, 13-Oct-87 22:14:18 EDT
Article-I.D.: westmark.211
Posted: Tue Oct 13 22:14:18 1987
Date-Received: Thu, 15-Oct-87 22:02:19 EDT
References: <1576@dicome.UUCP> <173@westmark.UUCP> <11098@orchid.waterloo.edu> <5819@ihlpa.ATT.COM>
Organization: Westmark, Inc., Warren, NJ, USA
Lines: 29
Xref: mnetor comp.sys.ibm.pc:9044 comp.lang.c:4896

In article <5819@ihlpa.ATT.COM>, rickf@ihlpa.ATT.COM (Fritz) writes:
> In article <11098@orchid.waterloo.edu> atbowler@orchid.waterloo.edu (Alan T. Bowler [SDG]) writes:
...
> > Operating system imposed limits on the order of 20 files ...
...
> In MS-DOS the op-sys limit can be changed with a line in the config.sys file
> of the form:
> 	FILES=<Number of handle wanted>


No, this doesn't solve Mr Bowler's problem!   The FILES= line in
config.sys adjusts the global limit (for all processes) but does not
increase the number of files available in any one process beyond 20.
The FILES= limit is the sum of the files opened by all processes,
active or dormant. 

Setting FILES= beyond 20 allows a process to open a lot of files,
and then spawn a subordinate process which then opens more files. 
The per-process file limit is imposed by the structure of the psp. 
It can be over-ridden by moving the table of file handles out of the
PSP and into user space.

The limit imposed by the MS-C runtime library, however, still gets
in the way.  Does anyone know how to circumvent that one?
-- 
Dave Levenson
Westmark, Inc.		A node for news.
Warren, NJ USA
{rutgers | clyde | mtune | ihnp4}!westmark!dave