strict_strtoul(9)
NAME
strict_strtoul - convert a string to an unsigned long strictly
SYNOPSIS
int strict_strtoul(const char * cp, unsigned int base,
unsigned long * res);
ARGUMENTS
- cp
- The string to be converted
- base
- The number base to use
- res
- The converted result value
DESCRIPTION
strict_strtoul converts a string to an unsigned long only if the string
is really an unsigned long string, any string containing any invalid
char at the tail will be rejected and -EINVAL is returned, only a
newline char at the tail is acceptible because people generally
CHANGE A MODULE PARAMETER IN THE FOLLOWING WAY
echo 1024 > /sys/module/e1000/parameters/copybreak
echo will append a newline to the tail.
It returns 0 if conversion is successful and *res is set to the
converted value, otherwise it returns -EINVAL and *res is set to 0.
simple_strtoul just ignores the successive invalid characters and
return the converted value of prefix part of the string.