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Encoding utils: libblkid Reference Manual

Encoding utils — encode strings to safe udev-compatible formats

int	blkid_encode_string ()
int	blkid_safe_string ()

int
blkid_encode_string (const char *str,
                     char *str_enc,
                     size_t len);

Encode all potentially unsafe characters of a string to the corresponding hex value prefixed by '\x'.

str	input string to be encoded
str_enc	output string to store the encoded input string
len	maximum size of the output string, which may be four times as long as the input string

0 if the entire string was copied, non-zero otherwise.

int
blkid_safe_string (const char *str,
                   char *str_safe,
                   size_t len);

Allows plain ascii, hex-escaping and valid utf8. Replaces all whitespaces with '_'.

0 on success or -1 in case of error.