projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * getopt.c | |
| 3 | */ | |
| 4 | ||
| 5 | #include <linux/kernel.h> | |
| 6 | #include <linux/string.h> | |
| 7 | #include <linux/net.h> | |
| 8 | ||
| 9 | #include "getopt.h" | |
| 10 | ||
| 11 | /** | |
| 12 | * smb_getopt - option parser | |
| 13 | * @caller: name of the caller, for error messages | |
| 14 | * @options: the options string | |
| 15 | * @opts: an array of &struct option entries controlling parser operations | |
| 16 | * @optopt: output; will contain the current option | |
| 17 | * @optarg: output; will contain the value (if one exists) | |
| 18 | * @flag: output; may be NULL; should point to a long for or'ing flags | |
| 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 smb_getopt(char *caller, char **options, struct option *opts, | |
| 27 | char **optopt, char **optarg, unsigned long *flag, | |
| 28 | unsigned long *value) | |
| 29 | { | |
| 30 | char *token; | |
| 31 | char *val; | |
| 32 | int i; | |
| 33 | ||
| 34 | do { | |
| 35 | if ((token = strsep(options, ",")) == NULL) | |
| 36 | return 0; | |
| 37 | } while (*token == '\0'); | |
| 38 | *optopt = token; | |
| 39 | ||
| 40 | *optarg = NULL; | |
| 41 | if ((val = strchr (token, '=')) != NULL) { | |
| 42 | *val++ = 0; | |
| 43 | if (value) | |
| 44 | *value = simple_strtoul(val, NULL, 0); | |
| 45 | *optarg = val; | |
| 46 | } | |
| 47 | ||
| 48 | for (i = 0; opts[i].name != NULL; i++) { | |
| 49 | if (!strcmp(opts[i].name, token)) { | |
| 50 | if (!opts[i].flag && (!val || !*val)) { | |
| 51 | printk("%s: the %s option requires an argument\n", | |
| 52 | caller, token); | |
| 53 | return -1; | |
| 54 | } | |
| 55 | ||
| 56 | if (flag && opts[i].flag) | |
| 57 | *flag |= opts[i].flag; | |
| 58 | ||
| 59 | return opts[i].val; | |
| 60 | } | |
| 61 | } | |
| 62 | printk("%s: Unrecognized mount option %s\n", caller, token); | |
| 63 | return -1; | |
| 64 | } |