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Message-Id: <20210313194836.372585-2-masahiroy@kernel.org>
Date: Sun, 14 Mar 2021 04:48:25 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: linux-kbuild@...r.kernel.org
Cc: Masahiro Yamada <masahiroy@...nel.org>,
linux-kernel@...r.kernel.org
Subject: [PATCH 02/13] kconfig: refactor option parse
The current option parse code is clumsy.
The 's' option is separately handled in a if-conditional due to the
following code:
input_mode = (enum input_mode)opt;
If 's' is moved the switch statement, the invalid value 's' would be
assigned to the input_mode.
Another potential problem is that we are mixing 'enum input_mode' and
ASCII characters. They could overwrap if we add more input modes.
To separate them out, set the flag field of long options to a pointer
of input_mode_opt. For mode select options, getopt_long() returns 0,
which never causes overwrap with ASCII characters that represent short
options.
Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---
scripts/kconfig/conf.c | 91 ++++++++++++++++++++----------------------
1 file changed, 43 insertions(+), 48 deletions(-)
diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index 063c9e7a34c1..dc1a67fd35a9 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -37,7 +37,7 @@ enum input_mode {
mod2yesconfig,
};
static enum input_mode input_mode = oldaskconfig;
-
+static int input_mode_opt;
static int indent = 1;
static int tty_stdio;
static int sync_kconfig;
@@ -474,21 +474,21 @@ static void check_conf(struct menu *menu)
}
static struct option long_opts[] = {
- {"oldaskconfig", no_argument, NULL, oldaskconfig},
- {"oldconfig", no_argument, NULL, oldconfig},
- {"syncconfig", no_argument, NULL, syncconfig},
- {"defconfig", required_argument, NULL, defconfig},
- {"savedefconfig", required_argument, NULL, savedefconfig},
- {"allnoconfig", no_argument, NULL, allnoconfig},
- {"allyesconfig", no_argument, NULL, allyesconfig},
- {"allmodconfig", no_argument, NULL, allmodconfig},
- {"alldefconfig", no_argument, NULL, alldefconfig},
- {"randconfig", no_argument, NULL, randconfig},
- {"listnewconfig", no_argument, NULL, listnewconfig},
- {"helpnewconfig", no_argument, NULL, helpnewconfig},
- {"olddefconfig", no_argument, NULL, olddefconfig},
- {"yes2modconfig", no_argument, NULL, yes2modconfig},
- {"mod2yesconfig", no_argument, NULL, mod2yesconfig},
+ {"oldaskconfig", no_argument, &input_mode_opt, oldaskconfig},
+ {"oldconfig", no_argument, &input_mode_opt, oldconfig},
+ {"syncconfig", no_argument, &input_mode_opt, syncconfig},
+ {"defconfig", required_argument, &input_mode_opt, defconfig},
+ {"savedefconfig", required_argument, &input_mode_opt, savedefconfig},
+ {"allnoconfig", no_argument, &input_mode_opt, allnoconfig},
+ {"allyesconfig", no_argument, &input_mode_opt, allyesconfig},
+ {"allmodconfig", no_argument, &input_mode_opt, allmodconfig},
+ {"alldefconfig", no_argument, &input_mode_opt, alldefconfig},
+ {"randconfig", no_argument, &input_mode_opt, randconfig},
+ {"listnewconfig", no_argument, &input_mode_opt, listnewconfig},
+ {"helpnewconfig", no_argument, &input_mode_opt, helpnewconfig},
+ {"olddefconfig", no_argument, &input_mode_opt, olddefconfig},
+ {"yes2modconfig", no_argument, &input_mode_opt, yes2modconfig},
+ {"mod2yesconfig", no_argument, &input_mode_opt, mod2yesconfig},
{NULL, 0, NULL, 0}
};
@@ -526,43 +526,38 @@ int main(int ac, char **av)
tty_stdio = isatty(0) && isatty(1);
while ((opt = getopt_long(ac, av, "hs", long_opts, NULL)) != -1) {
- if (opt == 's') {
- conf_set_message_callback(NULL);
- continue;
- }
- input_mode = (enum input_mode)opt;
switch (opt) {
- case syncconfig:
- /*
- * syncconfig is invoked during the build stage.
- * Suppress distracting "configuration written to ..."
- */
- conf_set_message_callback(NULL);
- sync_kconfig = 1;
- break;
- case defconfig:
- case savedefconfig:
- defconfig_file = optarg;
- break;
- case randconfig:
- set_randconfig_seed();
- break;
- case oldaskconfig:
- case oldconfig:
- case allnoconfig:
- case allyesconfig:
- case allmodconfig:
- case alldefconfig:
- case listnewconfig:
- case helpnewconfig:
- case olddefconfig:
- case yes2modconfig:
- case mod2yesconfig:
- break;
case 'h':
conf_usage(progname);
exit(1);
break;
+ case 's':
+ conf_set_message_callback(NULL);
+ break;
+ case 0:
+ input_mode = input_mode_opt;
+ switch (input_mode) {
+ case syncconfig:
+ /*
+ * syncconfig is invoked during the build stage.
+ * Suppress distracting
+ * "configuration written to ..."
+ */
+ conf_set_message_callback(NULL);
+ sync_kconfig = 1;
+ break;
+ case defconfig:
+ case savedefconfig:
+ defconfig_file = optarg;
+ break;
+ case randconfig:
+ set_randconfig_seed();
+ break;
+ default:
+ break;
+ }
+ default:
+ break;
}
}
if (ac == optind) {
--
2.27.0
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