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STRNLEN_USER(9) Memory Management in Linux STRNLEN_USER(9)

NAME

strnlen_user - Get the size of a string in user space.

SYNOPSIS

long strnlen_user(const char __user * s, long n);

ARGUMENTS

s

The string to measure.

n

The maximum valid length

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 the string is too long, returns a value greater than n.

COPYRIGHT

April 2023 Kernel Hackers Manual 2.6.