QemuOpts lets you write boolean options in "short form" where "abc" means "abc=on" and "noabc" means "abc=off". This is confusing, since it is not done for the first key=value pair but only if there is an implied key; it can also be grossly misused, for example "-device e1000,noid" will create a device with id equal to "off".
Unfortunately, this idiom has found wide use with -chardev (think "server,nowait") and to a lesser extent -spice. Patch 2 in this series deprecates it for all other option groups. The first patch avoids emitting the warning for the "help" option. Paolo Paolo Bonzini (2): qemu-option: move help handling to get_opt_name_value qemu-option: warn for short-form boolean options chardev/char.c | 1 + docs/system/deprecated.rst | 7 +++++ include/qemu/option.h | 1 + tests/test-qemu-opts.c | 1 + ui/spice-core.c | 1 + util/qemu-option.c | 55 +++++++++++++++++++++----------------- 6 files changed, 42 insertions(+), 24 deletions(-) -- 2.26.2
