olivert@glance.ch (Oliver Tschichold) (02/13/91)
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
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Oliver Tschichold
dipl. Informatik-Ing. ETH (M. Computer Sci.)
System-Administrator
--
Oliver Tschichold Glance Ltd.
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