[NTLUG:Discuss] Bash script way to tell if a filesystem is mounted

[Leroy Tennison]

Ralph Green wrote:
> Howdy,
>   I thought I had the script all working and then I ran across something
> like what you found.  When I run the stat command on a system with jfs,
> I always get a value of 0.  On xfs and ext2, everything works.  I don't
> have any systems with ext3.  Can anyone verify if a stat like Leroy used
> returns a non-zero value on ext3?  I would not ever setup a system with
> ext3 or ext4, but I know I should be prepared if I come across one and
> need to do diagnostics.
>  I am going to redo my script to use Chris' idea of grepping /etc/mtab
> or /proc/mounts.
> Good night,
> Ralph
>
> On Sat, 2010-05-29 at 16:24 -0500, Leroy Tennison wrote:
>   
>> [root at localhost ~]# stat -f --format='%i' /boot
>> 0
>> [root at localhost ~]# stat -f --format='%i' /boot/grub
>> 0
>> [root at localhost ~]#
>>
>> Not only am I seeing a directory and it's parent with the same file 
>> system ID when it is a mount point,  both IDs are zero.  Just in case 
>>     
>
>   
>> Any idea what's wrong?
>>     
>
>
>
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>   
My system is ext3.  Just out of curiosity, what is your objection to 
ext3/ext4?  I know that ext3 is slow when searching for files and ext4 
is new (maybe still buggy).  Other things I'm missing?

Patrick, what file system is your results associated with?