new syscall closefrom(2). ok deraadt millert

1 files changed, 60 insertions, 0 deletions

diff --git a/lib/libc/sys/closefrom.2 b/lib/libc/sys/closefrom.2
new file mode 100644
index 00000000000..e8821e40d60
--- /dev/null
+++ b/lib/libc/sys/closefrom.2
@@ -0,0 +1,60 @@
+.\"	$OpenBSD: closefrom.2,v 1.1 2004/01/12 18:27:28 tedu Exp $
+.\"
+.\" Copyright (c) 2004 Ted Unangst.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.Dd Jan 11, 2004
+.Dt CLOSEFROM 2
+.Os
+.Sh NAME
+.Nm closefrom
+.Nd delete many descriptors
+.Sh SYNOPSIS
+.Fd #include <unistd.h>
+.Ft int
+.Fn closefrom "int fd"
+.Sh DESCRIPTION
+The
+.Fn closefrom
+call deletes all descriptors numbered
+.Fa fd
+and higher from the per-process file descriptor table.
+It is effectively the same as calling
+.Xr close 2
+on each descriptor.
+.Sh RETURN VALUES
+Upon successful completion, a value of 0 is returned.
+Otherwise, a value of \-1 is returned and the global integer variable
+.Va errno
+is set to indicate the error.
+.Sh ERRORS
+.Fn closefrom
+will fail if:
+.Bl -tag -width Er
+.It Bq Er EBADF
+.Fa fd
+is greater than any open file descriptor.
+.It Bq Er EINTR
+An interrupt was received.
+.El
+.Sh SEE ALSO
+.Xr close 2