[RFC]: Provide IEEE 1003.1-2003 ulimit()

[Jeff Johnston]

Nicholas Wourms wrote:

> Jeff wrote:
>
>> Nicholas,
>>
>>  This sounds similar to the other BSD submission you made.  If your 
>> code requires any BSD-specific syscalls or interfaces  (i.e. any 
>> syscall/interface that is not part of the generic newlib), then the 
>> code must be put in sys/bsd.  You will have to create this 
>> directory.   This is along the lines of sys/linux.  Newlib is 
>> designed to work for embedded platforms, most without an OS.  An 
>> example of an exception to the rule is the 64-bit I/O routines that 
>> are shared among a number of systems that have 64-bit syscalls.  It 
>> is configurable and is needed to coexist properly with the regular 
>> I/O routines.
>> -- Jeff J.
>>
>
> Jeff,
>
> Well this isn't a "BSD"-specific submission, as the subject points 
> out, it is a ratified POSIX standard.  As for my prior submission, I 
> working on making it usable by everyone.  However, for the record, I'm 
> doing all this for Cygwin, not BSD, I just happen to make use of their 
> source if it is appropriate to do so.  Yes, I did use a syscall - 
> getrlimit - but I was careful to make sure it was widely avaiable on 
> both embedded and regular platforms.  That syscall, according to the 
> EL/IX-1.2 API specification,  is a level 1 requirement, which, if I 
> understand correctly, means it is supposed to be supported on 
> linux/embedded, eCos, Vxworks, pSOS, RTEMS, etc.  Also, getrlimit can 
> found on just about any other major unix out there, just punch it in 
> google (AIX, Solaris, SunOS, UnixWare, OSF/1, Tru64, HP/UX, BSD, 
> Darwin, Linux, to name a few...).  Since ulimit can be used by a 
> majority of the OS's newlib compiles for as well as most of the 
> popular embedded platforms, I don't understand why this is a problem.

The problem is that the majority of supported newlib configurations are 
"not" EL/IX compliant.  A simple compromise would be to follow the 
example of the posix_dir in configure.host.  Add a new gen_dir setting 
and have it set to gen for systems that can and want to use the code there.

-- Jeff J.