Burn ISO to Disc tool (and/or add it to Create Live Media)

Need to write a simple GUI around this. Code similar to Mount Disk Image.app.

sudo pkg install  -y "sysutils/dvd+rw-tools"

# FIXME: How to do this right? Add user to certain groups?
# growisofs refuses to run as root, but when run as a normal user, it cannot access /dev/pass0
sudo chmod 777 /dev/pass0

growisofs -dvd-compat -Z /dev/cd0=/home/user/Desktop/hello-0.7.0_0G108-FreeBSD-13.0-amd64.iso

Executing 'builtin_dd if=/home/user/Desktop/hello-0.7.0_0G108-FreeBSD-13.0-amd64.iso of=/dev/pass0 obs=32k seek=0'
/dev/pass0: "Current Write Speed" is 4.1x1352KBps.
    3964928/1095487488 ( 0.4%) @0.9x, remaining 22:56 RBU 100.0% UBU   2.9%
   22413312/1095487488 ( 2.0%) @4.0x, remaining 7:10 RBU 100.0% UBU 100.0%
   40861696/1095487488 ( 3.7%) @4.0x, remaining 5:09 RBU 100.0% UBU 100.0%
   59342848/1095487488 ( 5.4%) @4.0x, remaining 4:21 RBU 100.0% UBU 100.0%
   77791232/1095487488 ( 7.1%) @4.0x, remaining 4:08 RBU 100.0% UBU 100.0%
   96239616/1095487488 ( 8.8%) @4.0x, remaining 3:48 RBU 100.0% UBU 100.0%
  114720768/1095487488 (10.5%) @4.0x, remaining 3:33 RBU 100.0% UBU 100.0%
  133169152/1095487488 (12.2%) @4.0x, remaining 3:29 RBU 100.0% UBU 100.0%
  (...)
 1056374784/1095487488 (96.4%) @4.0x, remaining 0:07 RBU 100.0% UBU 100.0%
 1074823168/1095487488 (98.1%) @4.0x, remaining 0:03 RBU  61.6% UBU 100.0%
 1093304320/1095487488 (99.8%) @4.0x, remaining 0:00 RBU   6.5% UBU 100.0%
builtin_dd: 534912*2KB out @ average 3.9x1352KBps
/dev/pass0: flushing cache
/dev/pass0: updating RMA
/dev/pass0: closing disc

Also needs to ask whether it should erase an already-written disc first.

sudo dvd+rw-format -blank /dev/cd0

helloSystem / Utilities

Burn ISO to Disc tool (and/or add it to Create Live Media) #102