Re: mount weirdness

["Thomas Schmitt" <scdbackup@gmx.net>]

Hi,

i wrote:
> >    mount -v /dev/sdc /wa1
> >    echo $?

Duh. "/dev/sdb2", not "/dev/sdc".
(Do as i mean, not as i write.)


Dennis Wicks wrote:
> I'll put a note in my fstab so the next time I boot I can find it if the
> mount fails again!

Did i miss the report about some miracle cure beyond the link to /wa11 ?


I did a search for "wa1" in Linux kernel git.
  https://github.com/torvalds/linux/search?utf8=%E2%9C%93&q=wa1&type=
The name seems not to be hardcoded there.
So my best guess is that it is mistaken by mount(8) for something other
than a target path.

This opportunity to be mistaken could be excluded by a test program
which uses mount(2).
I tested this program "ts_mount.c":

-------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <sys/mount.h>
#include <errno.h>
#include <string.h>

int main()
{
 int ret;

 ret = mount("/dev/sr4", "/mnt/iso", "iso9660", MS_RDONLY, "");
 if(ret == 0) {
   printf("Success\n");
   exit(0);
 }
 printf("Failed\n");
 printf("errno= %d (%s)\n", errno, strerror(errno));
 exit(1);
}
-------------------------------------------------------------------------

with a DVD drive by:

  cc -g -Wall -o ts_mount ts_mount.c
  ./ts_mount

As normal user i got

  Failed
  errno= 1 (Operation not permitted)

and as superuser

  Success

Drive noise and listed files confirm the optimistic message.
Without medium i get

  Failed
  errno= 123 (No medium found)


Have a nice day :)

Thomas