From: Wang Nan <wangn...@huawei.com> Copying it to tools/lib/string.c, the counterpart to the kernel's lib/string.c.
This is preparation for enhancing BPF program configuration, which will allow config string like 'inlines=yes'. Signed-off-by: Wang Nan <wangn...@huawei.com> Cc: Alexei Starovoitov <a...@kernel.org> Cc: Jonathan Cameron <ji...@cam.ac.uk> Cc: Masami Hiramatsu <masami.hiramatsu...@hitachi.com> Cc: Zefan Li <lize...@huawei.com> Cc: pi3or...@163.com Link: http://lkml.kernel.org/r/1447675815-166222-6-git-send-email-wangn...@huawei.com [ Copied it to tools/lib/string.c instead, to make it usable by other tools/ ] Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/include/linux/string.h | 2 ++ tools/lib/string.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/tools/include/linux/string.h b/tools/include/linux/string.h index f3a6db6ad732..2e2f736c039c 100644 --- a/tools/include/linux/string.h +++ b/tools/include/linux/string.h @@ -6,4 +6,6 @@ void *memdup(const void *src, size_t len); +int strtobool(const char *s, bool *res); + #endif /* _LINUX_STRING_H_ */ diff --git a/tools/lib/string.c b/tools/lib/string.c index ecfd43a9b24e..065e54f42d8f 100644 --- a/tools/lib/string.c +++ b/tools/lib/string.c @@ -1,5 +1,20 @@ +/* + * linux/tools/lib/string.c + * + * Copied from linux/lib/string.c, where it is: + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * More specifically, the first copied function was strtobool, which + * was introduced by: + * + * d0f1fed29e6e ("Add a strtobool function matching semantics of existing in kernel equivalents") + * Author: Jonathan Cameron <ji...@cam.ac.uk> + */ + #include <stdlib.h> #include <string.h> +#include <errno.h> #include <linux/string.h> /** @@ -17,3 +32,31 @@ void *memdup(const void *src, size_t len) return p; } + +/** + * strtobool - convert common user inputs into boolean values + * @s: input string + * @res: result + * + * This routine returns 0 iff the first character is one of 'Yy1Nn0'. + * Otherwise it will return -EINVAL. Value pointed to by res is + * updated upon finding a match. + */ +int strtobool(const char *s, bool *res) +{ + switch (s[0]) { + case 'y': + case 'Y': + case '1': + *res = true; + break; + case 'n': + case 'N': + case '0': + *res = false; + break; + default: + return -EINVAL; + } + return 0; +} -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
