mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-21 00:42:16 +00:00
75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
|
/*
|
||
|
|
* getopt.c
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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;
|
||
|
|
}
|
||
|
|
printk(KERN_INFO "%s: the %s option requires an argument\n",
|
||
|
|
caller, token);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
if (opts->has_arg & OPT_INT) {
|
||
|
|
char* v;
|
||
|
|
|
||
|
|
*value = simple_strtoul(val, &v, 0);
|
||
|
|
if (!*v) {
|
||
|
|
return opts->val;
|
||
|
|
}
|
||
|
|
printk(KERN_INFO "%s: invalid numeric value in %s=%s\n",
|
||
|
|
caller, token, val);
|
||
|
|
return -EDOM;
|
||
|
|
}
|
||
|
|
if (opts->has_arg & OPT_STRING) {
|
||
|
|
return opts->val;
|
||
|
|
}
|
||
|
|
printk(KERN_INFO "%s: unexpected argument %s to the %s option\n",
|
||
|
|
caller, val, token);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
printk(KERN_INFO "%s: Unrecognized mount option %s\n", caller, token);
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
}
|