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udhcpc: revert deprecation message for -V

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"-x vendor:VENDOR" will not be a trivial replacement of it:

(1) by default, we do send a vendor string ("udhcp BB_VER"),
will need code to preserve the default.

(2) -V '' currently disables vendor string. -x vendor:''
would not easily achieve that: it adds no option at all
(string options can't be empty), and default (1) would trigger.
To avoid that, we will need yet another hack to detect
-x vendor:'' and interpret that as "no vendor string at all".

IOW: removing -V is likely to increase code size, not decrease.

function                                             old     new   delta
udhcpc_main                                         2563    2555      -8
.rodata                                           103251  103198     -53
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-61)             Total: -61 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2021-06-05 16:48:06 +02:00
parent 5a72b0cd74
commit 274ce6cce1
1 changed files with 1 additions and 4 deletions
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5
networking/udhcp/dhcpc.c
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@ -1326,10 +1326,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
} }
if (str_V[0] != '\0') { if (str_V[0] != '\0') {
char *p; char *p;
unsigned len; unsigned len = strnlen(str_V, 254);
//msg added 2021-06
bb_error_msg("option -V VENDOR is deprecated, use -x vendor:VENDOR");
len = strlen(str_V);
p = udhcp_insert_new_option( p = udhcp_insert_new_option(
&client_data.options, DHCP_VENDOR, &client_data.options, DHCP_VENDOR,
len, /*dhcp6:*/ 0); len, /*dhcp6:*/ 0);