[sf-lug] problem using gnu parted

[Aaron D Borden]

Quoting Alex Kleider (2018-01-30 10:08:50)
> 
> I'm working on a script that can shrink an .img file created by 'dd'ing 
> an sd card to the .img file.
> 'parted' is telling me something that seems inconsistent with the facts- 
> here's some output to illustrate:
> 
> """
> Partition 2 file system size is now (684975 * 4096) 2805657600 bytes.
> Use GNU parted to list partitions...
>    $ parted /dev/loop0  unit 's' print
> ...and pipe it into ./get_parted_info.py  (a script to extract the 
> sector boundaries)
> For each partition:
>    #  Begin    End
>    1  8192     93236
>    2  94208     7744511
> About to run following command:
>    $ parted -s /dev/loop0 resizepart 2 5574007

My guess is that parted is not using sectors at the unit by default.
Have you tried specifying the unit explicitly (adding an "s" to the
value)?

    $ parted -s /dev/loop0 resizepart 2 5574007s

> ...to resize the second partition.
> Error: The location 5574007 is outside of the device /dev/loop0.
> Error setting last sector of 2nd partition!
> """
> ... but 5574007 is considerably less than 7744511!!
> 
> I switched from fdisk to parted so that I could automate the procedure 
> (with in a script.) When doing it manually using fdisk, it went fine. 
> Using parted manually resulted in the same error.
> 
> Any ideas welcome!
> -- 
> Alex Kleider
> (sent from my current gizmo)
> 
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--
Aaron D Borden
Human and Hacker