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| H A D | qemu-option.c | afd73625 Tue Nov 03 07:48:11 CST 2020 Paolo Bonzini <pbonzini@redhat.com> qemu-option: move help handling to get_opt_name_value
Right now, help options are parsed normally and then checked
specially in opt_validate, but only if coming from
qemu_opts_parse_noisily. has_help_option does the check on its own.
opt_validate() has two callers: qemu_opt_set(), which passes null and is
therefore unaffected, and opts_do_parse(), which is affected.
opts_do_parse() is called by qemu_opts_do_parse(), which passes null and
is therefore unaffected, and opts_parse().
opts_parse() is called by qemu_opts_parse() and qemu_opts_set_defaults(),
which pass null and are therefore unaffected, and
qemu_opts_parse_noisily().
Move the check from opt_validate to the parsing workhorse of QemuOpts,
get_opt_name_value. This will come in handy in the next patch, which
will raise a warning for "-object memory-backend-ram,share" ("flag" option
with no =on/=off part) but not for "-object memory-backend-ram,help".
As a result:
- opts_parse and opts_do_parse do not return an error anymore
when help is requested; qemu_opts_parse_noisily does not have
to work around that anymore.
- various crazy ways to request help are not recognized anymore:
- "help=..."
- "nohelp" (sugar for "help=off")
- "?=..."
- "no?" (sugar for "?=off")
- "help" would be recognized as help request even if there is a (foolishly
named) parameter "help". No such parameters exist, though.
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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