diff options
Diffstat (limited to 'fs/smbfs/getopt.c')
-rw-r--r-- | fs/smbfs/getopt.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/fs/smbfs/getopt.c b/fs/smbfs/getopt.c new file mode 100644 index 00000000000..7ae0f5273ab --- /dev/null +++ b/fs/smbfs/getopt.c @@ -0,0 +1,64 @@ +/* + * getopt.c + */ + +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/net.h> + +#include "getopt.h" + +/** + * smb_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) + * @flag: output; may be NULL; should point to a long for or'ing flags + * @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 smb_getopt(char *caller, char **options, struct option *opts, + char **optopt, char **optarg, unsigned long *flag, + unsigned long *value) +{ + char *token; + char *val; + int i; + + do { + if ((token = strsep(options, ",")) == NULL) + return 0; + } while (*token == '\0'); + *optopt = token; + + *optarg = NULL; + if ((val = strchr (token, '=')) != NULL) { + *val++ = 0; + if (value) + *value = simple_strtoul(val, NULL, 0); + *optarg = val; + } + + for (i = 0; opts[i].name != NULL; i++) { + if (!strcmp(opts[i].name, token)) { + if (!opts[i].flag && (!val || !*val)) { + printk("%s: the %s option requires an argument\n", + caller, token); + return -1; + } + + if (flag && opts[i].flag) + *flag |= opts[i].flag; + + return opts[i].val; + } + } + printk("%s: Unrecognized mount option %s\n", caller, token); + return -1; +} |