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On 02/25/2011 08:28 PM, Arnaud Lacombe wrote:
> Hi,
>
> On Fri, Feb 25, 2011 at 7:44 PM, Jeff Mahoney <jeffm@xxxxxxxx> wrote:
>> This patch adds type handlers for compressed config files. Initial
>> support provides callouts for gzip and bzip2, but there's no reason
>> others could be added if demand is there.
>>
>> This is intended to allow /proc/config.gz be a configuration source
>> for 'make oldconfig' when .config is absent.
>>
> this can be trivially scripted, any reason it _has_ to be done within kconfig ?
This is what the original patch I posted did, and I was asked to teach
kconfig how to do it itself.
- -Jeff
>> Signed-off-by: Jeff Mahoney <jeffm@xxxxxxxx>
>> ---
>>
>> scripts/kconfig/zconf.l | 50 ++++++++++++++++++++++++++++++++++++++++++++++--
>> 1 file changed, 48 insertions(+), 2 deletions(-)
>>
>> --- a/scripts/kconfig/zconf.l
>> +++ b/scripts/kconfig/zconf.l
>> @@ -256,6 +256,44 @@ static void zconf_endhelp(void)
>> BEGIN(INITIAL);
>> }
>>
>> +static const struct type_handler {
>> + const char *suffix;
>> + const char *command;
>> +} type_handlers[] = {
>> + {
>> + .suffix = ".gz",
>> + .command = "zcat",
>> + },
>> + {
>> + .suffix = ".bz2",
>> + .command = "bzcat",
>> + },
>> + /* Whatever other algorithms you like */
>> + {}
>> +};
>> +
>> +static const struct type_handler *get_type_handler(const char *name)
>> +{
>> + char *p = rindex(name, '.');
>> + if (p) {
>> + const struct type_handler *ops = type_handlers;
>> + for (ops = type_handlers; ops->suffix; ops++) {
>> + if (!strcasecmp(ops->suffix, p))
>> + break;
>> + }
>> + if (!ops->suffix)
>> + return NULL;
>> + return ops;
>> + }
>> + return NULL;
>> +}
>> +
>> +static FILE *zconf_popen(const char *command, const char *name)
>> +{
>> + char cmdbuf[PATH_MAX + strlen(command) + 2];
>> + snprintf(cmdbuf, sizeof(cmdbuf), "%s %s", command, name);
>> + return popen(cmdbuf, "r");
>> +}
>>
>> /*
>> * Try to open specified file with following names:
>> @@ -267,15 +305,23 @@ static void zconf_endhelp(void)
>> */
>> FILE *zconf_fopen(const char *name)
>> {
>> + const struct type_handler *handler = get_type_handler(name);
>> char *env, fullname[PATH_MAX+1];
>> FILE *f;
>>
>> - f = fopen(name, "r");
>> + if (handler)
>> + f = zconf_popen(handler->command, name);
>> + else
>> + f = fopen(name, "r");
>> +
>> if (!f && name != NULL && name[0] != '/') {
>> env = getenv(SRCTREE);
>> if (env) {
>> sprintf(fullname, "%s/%s", env, name);
>> - f = fopen(fullname, "r");
>> + if (handler)
>> + f = zconf_popen(handler->command, fullname);
>> + else
>> + f = fopen(fullname, "r");
>> }
>> }
>> return f;
>>
>> --
>> Jeff Mahoney
>> SUSE Labs
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in
>> the body of a message to majordomo@xxxxxxxxxxxxxxx
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>>
- --
Jeff Mahoney
SUSE Labs
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