diff options
| -rw-r--r-- | backport/backport-include/linux/string.h | 4 | ||||
| -rw-r--r-- | backport/compat/backport-4.6.c | 26 |
2 files changed, 30 insertions, 0 deletions
diff --git a/backport/backport-include/linux/string.h b/backport/backport-include/linux/string.h index 4b35eb9f..2bfdf747 100644 --- a/backport/backport-include/linux/string.h +++ b/backport/backport-include/linux/string.h @@ -33,4 +33,8 @@ ssize_t strscpy(char *dest, const char *src, size_t count); char *strreplace(char *s, char old, char new); #endif +#if LINUX_VERSION_IS_LESS(4,6,0) +int match_string(const char * const *array, size_t n, const char *string); +#endif /* LINUX_VERSION_IS_LESS(4,5,0) */ + #endif /* __BACKPORT_LINUX_STRING_H */ diff --git a/backport/compat/backport-4.6.c b/backport/compat/backport-4.6.c index 54ff669d..8d0ecf56 100644 --- a/backport/compat/backport-4.6.c +++ b/backport/compat/backport-4.6.c @@ -75,3 +75,29 @@ int kstrtobool_from_user(const char __user *s, size_t count, bool *res) return kstrtobool(buf, res); } EXPORT_SYMBOL_GPL(kstrtobool_from_user); + +/** + * match_string - matches given string in an array + * @array: array of strings + * @n: number of strings in the array or -1 for NULL terminated arrays + * @string: string to match with + * + * Return: + * index of a @string in the @array if matches, or %-EINVAL otherwise. + */ +int match_string(const char * const *array, size_t n, const char *string) +{ + int index; + const char *item; + + for (index = 0; index < n; index++) { + item = array[index]; + if (!item) + break; + if (!strcmp(item, string)) + return index; + } + + return -EINVAL; +} +EXPORT_SYMBOL(match_string); |