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.TH "STRNCPY_FROM_USER" "" "06 October 2005" "" ""

.SH NAME
strncpy_from_user \- Copy a NUL terminated string from userspace.
.SH SYNOPSIS
"SYNOPSIS"
.sp
\fB
.sp
long strncpy_from_user  (char * \fIdst\fB, const char __user * \fIsrc\fB, long \fIcount\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIdst\fB\fR
Destination address, in kernel space.  This buffer must be at
least \fIcount\fR bytes long.
.TP
\fB\fIsrc\fB\fR
Source address, in user space.
.TP
\fB\fIcount\fB\fR
Maximum number of bytes to copy, including the trailing NUL.
.SH "DESCRIPTION"
.PP
Copies a NUL-terminated string from userspace to kernel space.
.PP
On success, returns the length of the string (not including the trailing
NUL).
.PP
If access to userspace fails, returns -EFAULT (some data may have been
copied).
.PP
If \fIcount\fR is smaller than the length of the string, copies \fIcount\fR bytes
and returns \fIcount\fR\&.