https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: c517d838eb7d07bbe9507871fab3931deccff539 authored by Linus Torvalds on 23 February 2015, 02:21:14 UTC
Linux 4.0-rc1
Linux 4.0-rc1
Tip revision: c517d83
getopt.c
/*
* 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;
}