Bluetooth: Add CID field to L2CAP socket address structure
[linux-2.6] / fs / ncpfs / getopt.c
1 /*
2  * getopt.c
3  */
4
5 #include <linux/kernel.h>
6 #include <linux/string.h>
7
8 #include <asm/errno.h>
9
10 #include "getopt.h"
11
12 /**
13  *      ncp_getopt - option parser
14  *      @caller: name of the caller, for error messages
15  *      @options: the options string
16  *      @opts: an array of &struct option entries controlling parser operations
17  *      @optopt: output; will contain the current option
18  *      @optarg: output; will contain the value (if one exists)
19  *      @value: output; may be NULL; will be overwritten with the integer value
20  *              of the current argument.
21  *
22  *      Helper to parse options on the format used by mount ("a=b,c=d,e,f").
23  *      Returns opts->val if a matching entry in the 'opts' array is found,
24  *      0 when no more tokens are found, -1 if an error is encountered.
25  */
26 int ncp_getopt(const char *caller, char **options, const struct ncp_option *opts,
27                char **optopt, char **optarg, unsigned long *value)
28 {
29         char *token;
30         char *val;
31
32         do {
33                 if ((token = strsep(options, ",")) == NULL)
34                         return 0;
35         } while (*token == '\0');
36         if (optopt)
37                 *optopt = token;
38
39         if ((val = strchr (token, '=')) != NULL) {
40                 *val++ = 0;
41         }
42         *optarg = val;
43         for (; opts->name; opts++) {
44                 if (!strcmp(opts->name, token)) {
45                         if (!val) {
46                                 if (opts->has_arg & OPT_NOPARAM) {
47                                         return opts->val;
48                                 }
49                                 printk(KERN_INFO "%s: the %s option requires an argument\n",
50                                        caller, token);
51                                 return -EINVAL;
52                         }
53                         if (opts->has_arg & OPT_INT) {
54                                 char* v;
55
56                                 *value = simple_strtoul(val, &v, 0);
57                                 if (!*v) {
58                                         return opts->val;
59                                 }
60                                 printk(KERN_INFO "%s: invalid numeric value in %s=%s\n",
61                                         caller, token, val);
62                                 return -EDOM;
63                         }
64                         if (opts->has_arg & OPT_STRING) {
65                                 return opts->val;
66                         }
67                         printk(KERN_INFO "%s: unexpected argument %s to the %s option\n",
68                                 caller, val, token);
69                         return -EINVAL;
70                 }
71         }
72         printk(KERN_INFO "%s: Unrecognized mount option %s\n", caller, token);
73         return -EOPNOTSUPP;
74 }