diff options
Diffstat (limited to 'arch/s390/boot/string.c')
| -rw-r--r-- | arch/s390/boot/string.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/s390/boot/string.c b/arch/s390/boot/string.c index 09ca9130e73a..25aca07898ba 100644 --- a/arch/s390/boot/string.c +++ b/arch/s390/boot/string.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 #include <linux/ctype.h> #include <linux/kernel.h> +#include <linux/errno.h> #include "../lib/string.c" int strncmp(const char *cs, const char *ct, size_t count) @@ -98,3 +99,40 @@ long simple_strtol(const char *cp, char **endp, unsigned int base) return simple_strtoull(cp, endp, base); } + +int kstrtobool(const char *s, bool *res) +{ + if (!s) + return -EINVAL; + + switch (s[0]) { + case 'y': + case 'Y': + case '1': + *res = true; + return 0; + case 'n': + case 'N': + case '0': + *res = false; + return 0; + case 'o': + case 'O': + switch (s[1]) { + case 'n': + case 'N': + *res = true; + return 0; + case 'f': + case 'F': + *res = false; + return 0; + default: + break; + } + default: + break; + } + + return -EINVAL; +} |