Xref: utzoo comp.protocols.nfs:1779 comp.sys.dec:5039 comp.unix.ultrix:6186
Path: utzoo!utgpu!watserv1!watmath!att!linac!pacific.mps.ohio-state.edu!zaphod.mps.ohio-state.edu!samsung!uunet!mcsun!cernvax!chx400!chx400!vichy.glance.ch!olivert
From: olivert@glance.ch (Oliver Tschichold)
Newsgroups: comp.protocols.nfs,comp.sys.dec,comp.unix.ultrix
Subject: nfs-mount c-call problem on Ultrix 4.1
Keywords: Ultrix, NFS, mount
Message-ID: <1991Feb13.124718.11746@glance.ch>
Date: 13 Feb 91 12:47:18 GMT
Sender: olivert@glance.ch
Reply-To: olivert@glance.ch
Organization: Glance Ltd., CH-8162 Steinmaur
Lines: 69

We are using a uVAX II and a DECsystem 5100 both running Ultrix 4.1.
I would like to mount and umount NFS-directories in a C program.
This is what I have done:


----------cut here------------

#include <stdio.h>
#include <sys/types.h>
#include <sys/fs_types.h>
#include <errno.h>

int i;
char foreign[]="otherhost:/", local[]="/mnt", para[]="";

main()
{
  i=mount(foreign,local,0,GT_NFS,para);
  fprintf(stderr,"mount returned %i, error=%i \n",i,errno);
  perror("mount_test");
};

--------end cut here----------

I compile with
cc -o mount_test mount_test.c
(VAX C)

What's happening?
When I start the program as root, I get the following output:

----------cut here------------
mount returned -1, error=14 
mount_test: Bad address
--------end cut here----------

This happens on both the uVAX II and the DECsystem 5100 trying to
mount the other's root directory. Both servers export their root 
directories in /etc/exports.

Here are some results of my own research:
- The manual mount(2nfs) lists GT_NFS as 0x04. The actual value as
  defined in <sys/fs_types.h> is 0x05, however. Changing this value 
  does not make it work, although the error code changes.
- Adding parameters to the parameter string does not have any impact.

What do I do wrong? Please respond via email. If the responses are
numerous, I'll post a summary.

Thanx -- Oliver

      _______
_____/ _____  \    Glance Ltd.  Software Engineering
______/ / \ \__    
      \_\_/_/      Glance Ltd.
       / /||       Gewerbestrasse 4
    __/ / ||       CH-8162 Steinmaur      Telephone: 41-1-853-3949
   |___/  ||       Switzerland            Telefax:   41-1-853-0809


Oliver Tschichold
dipl. Informatik-Ing. ETH (M. Computer Sci.)
System-Administrator

-- 
Oliver Tschichold					Glance Ltd.
olivert@glance.ch					Gewerbestrasse 4
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