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.TH "SYS_FLOCK" "" "06 October 2005" "" ""

.SH NAME
sys_flock \- flock system call.
.SH SYNOPSIS
"SYNOPSIS"
.sp
\fB
.sp
asmlinkage long sys_flock  (unsigned int \fIfd\fB, unsigned int \fIcmd\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIfd\fB\fR
the file descriptor to lock.
.TP
\fB\fIcmd\fB\fR
the type of lock to apply.
.SH "DESCRIPTION"
.PP
Apply a FL_FLOCK style lock to an open file descriptor.
The \fIcmd\fR can be one of
.PP
LOCK_SH -- a shared lock.
.PP
LOCK_EX -- an exclusive lock.
.PP
LOCK_UN -- remove an existing lock.
.PP
LOCK_MAND -- a `mandatory' flock.  This exists to emulate Windows Share Modes.
.PP
LOCK_MAND can be combined with LOCK_READ or LOCK_WRITE to allow other
processes read and write access respectively.