threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* getopt.c
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <asm/errno.h>
|
|
|
|
#include "getopt.h"
|
|
|
|
/**
|
|
* ncp_getopt - option parser
|
|
* @caller: name of the caller, for error messages
|
|
* @options: the options string
|
|
* @opts: an array of &struct option entries controlling parser operations
|
|
* @optopt: output; will contain the current option
|
|
* @optarg: output; will contain the value (if one exists)
|
|
* @value: output; may be NULL; will be overwritten with the integer value
|
|
* of the current argument.
|
|
*
|
|
* Helper to parse options on the format used by mount ("a=b,c=d,e,f").
|
|
* Returns opts->val if a matching entry in the 'opts' array is found,
|
|
* 0 when no more tokens are found, -1 if an error is encountered.
|
|
*/
|
|
int ncp_getopt(const char *caller, char **options, const struct ncp_option *opts,
|
|
char **optopt, char **optarg, unsigned long *value)
|
|
{
|
|
char *token;
|
|
char *val;
|
|
|
|
do {
|
|
if ((token = strsep(options, ",")) == NULL)
|
|
return 0;
|
|
} while (*token == '\0');
|
|
if (optopt)
|
|
*optopt = token;
|
|
|
|
if ((val = strchr (token, '=')) != NULL) {
|
|
*val++ = 0;
|
|
}
|
|
*optarg = val;
|
|
for (; opts->name; opts++) {
|
|
if (!strcmp(opts->name, token)) {
|
|
if (!val) {
|
|
if (opts->has_arg & OPT_NOPARAM) {
|
|
return opts->val;
|
|
}
|
|
pr_info("%s: the %s option requires an argument\n",
|
|
caller, token);
|
|
return -EINVAL;
|
|
}
|
|
if (opts->has_arg & OPT_INT) {
|
|
int rc = kstrtoul(val, 0, value);
|
|
|
|
if (rc) {
|
|
pr_info("%s: invalid numeric value in %s=%s\n",
|
|
caller, token, val);
|
|
return rc;
|
|
}
|
|
return opts->val;
|
|
}
|
|
if (opts->has_arg & OPT_STRING) {
|
|
return opts->val;
|
|
}
|
|
pr_info("%s: unexpected argument %s to the %s option\n",
|
|
caller, val, token);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
pr_info("%s: Unrecognized mount option %s\n", caller, token);
|
|
return -EOPNOTSUPP;
|
|
}
|