STRICT_STRTOULL(9) Basic C Library Functions STRICT_STRTOULL(9)
NAME
strict_strtoull - convert a string to an unsigned long long strictly
SYNOPSIS
int strict_strtoull(const char * cp, unsigned int base, unsigned long long * res);
ARGUMENTS
cp
The string to be converted
base
The number base to use
res
The converted result value
DESCRIPTION
strict_strtoull converts a string to an unsigned long long only if the string is really an unsigned long 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 of the string.
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_strtoull just ignores the successive invalid characters and return the converted value of prefix part of the string.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 STRICT_STRTOULL(9)
