Name
strlen_user —
Get the size of a string in user space.
Arguments
str
The string to measure.
Context
User context only. This function may sleep.
Description
Get the size of a NUL-terminated string in user space.
Returns the size of the string INCLUDING the terminating NUL.
On exception, returns 0.
If there is a limit on the length of a valid string, you may wish to
consider using strnlen_user instead.