centos man page for kstrtoul

KSTRTOUL(9)						     Basic C Library Functions						       KSTRTOUL(9)

NAME
       kstrtoul - convert a string to an unsigned long

SYNOPSIS
       int kstrtoul(const char * s, unsigned int base, unsigned long * res);

ARGUMENTS
       s
	   The start of the string. The string must be null-terminated, and may also include a single newline before its terminating null. The
	   first character may also be a plus sign, but not a minus sign.

       base
	   The number base to use. The maximum supported base is 16. If base is given as 0, then the base of the string is automatically detected
	   with the conventional semantics - If it begins with 0x the number will be parsed as a hexadecimal (case insensitive), if it otherwise
	   begins with 0, it will be parsed as an octal number. Otherwise it will be parsed as a decimal.

       res
	   Where to write the result of the conversion on success.

DESCRIPTION
       Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error. Used as a replacement for the obsolete simple_strtoull. Return code
       must be checked.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							       KSTRTOUL(9)