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+++ This bug was initially created as a clone of Bug #980337 +++

Description of problem:
disk-format does not give an error when the file is inexistent


Version-Release number of selected component (if applicable):
libguestfs-1.20.9-6.el6.x86_64


How reproducible:
100%


Steps to Reproduce:
[root@]# guestfish -N fs mount /dev/sda1 / : list-partitions : disk-format /dev/sda2 : disk-format /dev/sda3
/dev/sda1
raw
libguestfs: error: realpath: No such file or directory



Actual results:
disk-format /dev/sda2 , returns "raw"


Expected results:
"disk-format /dev/sda2" should give a error message as "disk-format /dev/sda3"


Additional info:
also effect "disk-virtual-size"

Let's reuse this bug to fix the somewhat related problem:

$ guestfish disk-format /etc/nosuchfile
libguestfs: error: qemu-img info: JSON parse error: parse error: premature EOF
                                       
                     (right here) ------^

libguestfs: error: qemu-img info: /etc/nosuchfile: qemu-img info exited with error status 1.
To see full error messages you may need to enable debugging.
See http://libguestfs.org/guestfs-faq.1.html#debugging-libguestfs

Fixed upstream in:

https://github.com/libguestfs/libguestfs/commit/aecb5f4b33107935191099dbd5559113f59ee51c
https://github.com/libguestfs/libguestfs/commit/d50cb7bbb4cc18f69ea1425e9f5cee9685825f95
https://github.com/libguestfs/libguestfs/commit/28e08776824dd3152638e647259c2f4701a0a577

and the last one is a regression test:

https://github.com/libguestfs/libguestfs/commit/2311fb0632a64cfa2bab8bf65c82ffaa042d619e

Verified with libguestfs-1.22.6-16.el7.x86_64

# guestfish disk-format /etc/nosuchfile
libguestfs: error: disk info: /etc/nosuchfile: No such file or directory

It gives a correct error message, change the status to verified

This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.