thanks for you help!
2008-05-05
发件人： James Carlson
发送时间： 2008-05-05 19:41:21
收件人： cyx_mail@xxxxxxxxxxx
抄送： linux-ppp
主题： Re: about option_t
cyx_mail@xxxxxxxxxxx writes:
> Which piece of code call the void *addr.
'addr' is a type-dependent value. It's not necessarily called as a
function -- that only happens if the type is o_special,
o_special_noarg, or o_wild.
> some plugins uses this pointer to call functions when the plugin loads. BTW, what is the exactly meaning of each value of enum opt_type struct? Thanks a lot!
The values should be relatively self-explanatory, if you read the code
in options.c or examine any of the code that uses the options.
o_special_noarg - option is processed by a function call and
consumes no other arguments.
o_special - option processed by function call and consumes one more
argument.
o_bool - option address is a 'bool' to be set to the lower 8 bits of
'flags'. If 'addr2' is set, use the OPT_A2{COPY,CLR,CLRB,OR) to
determine what is done to that value.
o_int - parse an integer, offset by low 8 bits of 'flags', and store
in 'addr'.
o_wild - special self-identifying option (no keyword; parsed by
appearance). Used only for IPv4 addresses, device name, and tty
speed.
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