Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!munnari.oz.au!uhccux!bt455s10
From: bt455s10@uhccux.uhcc.hawaii.edu (Carl "Art" McIntosh)
Newsgroups: comp.sys.ncr
Subject: Re: mkdir()
Summary: OS 2.01.00 undocumented mkdir()
Message-ID: <6045@uhccux.uhcc.hawaii.edu>
Date: 6 Jan 90 00:07:19 GMT
References: <5849@uhccux.uhcc.hawaii.edu> <25350001@hpisod2.HP.COM>
Reply-To: bt455s10@uhccux.UUCP (Carl "Art" McIntosh)
Organization: University of Hawaii
Lines: 32

NO, the mkdir() function is *completely* undocumented in OS 2.01.00,
furthermore, it is broken.  I ran across the following problem when
installing perl 3.0 patchlevel 8 on our NCR Tower 32/650. 

perl compiled ok except for a minor problem with optimizer labels,
which was fixed via -W2,-Sl,2000 ... when I ran "make test", op.mkdir
failed on test 3.  I posted an article to the net, and a knowledgable
fellow in Oslo, Norway sent me mail pointing me to the problem.  I
verifyed the problem with a small C test program.  It seems mkdir.o
exists in /lib/libc.a, /lib/libcieee and /lib/libc88.a, is NOT documented
in the programmers ref, and has NO manpage on the system.  It does NOT
set errno when an error is encountered.  The program below demonstrates
the problem.

main()
{
	if (mkdir("art") == -1)
		printf("%d\n", errno);
}

use mkdir(1) to create an "art" directory before running the program.
The output from the above program is "25", which corresponds to
ENOTTY (Not a typerwriter) in /usr/include/sys/errno.h.

You can use ar(1) easily enough to remove the offending routine,
in which case the perl 3.0 Configure will NOT define it and 
/bin/mkdir will be forked instead.

Art Neilson
Bank of Hawaii Tech Support
ARPA: manapua!pilikia!root@trout.nosc.mil
UUCP: {uunet,ucbvax,dcdwest}!ucsd!nosc!manapua!pilikia!root