default loop0 risks messing up systems with other loop devices

[docteurmystere]

suggesting the use of 'losetup -f' to select the first free loop device

[amouiche]

you are right... I miss the --show option to capture the /dev/loop found

[docteurmystere]

tried this and works.

parser.add_argument("--loop", metavar="DEV", default=subprocess.check_output(["/sbin/losetup","-f"]).strip().decode('ascii'), help="/dev/loopX device to use for 'NAS config' FS resize (default: use the first loop available)")

[amouiche]

Hello. I just create a "dev" branch with changes for all your issues:

• auto loop setup
• possibility to skip bootargs and bootcmd
• no absolute path for flashcp & co

I don't have the possibility to fully test since I must downgrade my QNAP test device to buster first. But can you at least check it in dryrun mode ?

[docteurmystere]

hello! unfortunately i have resized all by now and the script rightly refuses to run. by reading the code i notice two things:

• the script does not warn about updating initrd loadpoint at lines 288-289, i.e. "initrd=0xa00000,0x900000" -> "initrd=0xb00000,0xc00000";
• typo in line 127 "Use and empty file".

i applaud your elegant solution of providing a custom setenv script.

[amouiche]

"losetup -f" feature is now used by the script