Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

mdoc and Grammar improvements (at least I hope so :) ).

Browse Source
This commit is contained in:
wiz 2004-09-06 16:25:29 +00:00
parent ee9d1625eb
commit b19910cb19
1 changed files with 17 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
share/man/man9/mbuf.9
View File

@ -1,4 +1,4 @@
.\" $NetBSD: mbuf.9,v 1.29 2004/09/06 09:45:27 yamt Exp $
.\" $NetBSD: mbuf.9,v 1.30 2004/09/06 16:25:29 wiz Exp $
.\"
.\" Copyright (c) 1997 The NetBSD Foundation, Inc.
.\" All rights reserved.
@ -334,12 +334,11 @@ back into the mbuf chain
starting
.Fa off
bytes from the beginning, extending the mbuf chain if necessary.
Unless attempting to extend the chain,
.Fn m_copyback
never fail.
As extending the chain can fail, caller should check the failure
by checking the resulted length of the chain in that case.
It's an error to use
can only fail when extending the chain.
The caller should check for this kind of failure
by checking the resulting length of the chain in that case.
It is an error to use
.Fn m_copyback
on read-only mbufs.
.It Fn m_copyback_cow "struct mbuf *m0" "int off" "int len" "caddr_t cp" \
@ -355,14 +354,15 @@ as
does.
Unlike
.Fn m_copyback ,
It's safe to use
it is safe to use
.Fn m_copyback_cow
on read-only mbufs.
If needed,
.Fn m_copyback_cow
automatically allocate new mbufs and adjust chain.
It returns a pointer to resulted mbuf chain on success.
Otherwise, it returns NULL.
automatically allocates new mbufs and adjusts the chain.
It returns a pointer to the resulting mbuf chain on success.
Otherwise, it returns
.Dv NULL .
In that case, the original mbuf
.Fa m0
will be freed.
@ -370,11 +370,11 @@ The
.Fa how
parameter is a choice of
.Dv M_WAIT / M_DONTWAIT
from caller.
from the caller.
Unlike
.Fn m_copyback ,
extending the mbuf chain isn't supported.
It's an error to attempt to extend the mbuf chain using
It is an error to attempt to extend the mbuf chain using
.Fn m_copyback_cow .
.It Fn m_makewritable "struct mbuf **mp" "int off" "int len" "int how"
Rearranges an mbuf chain so that
@ -382,21 +382,21 @@ Rearranges an mbuf chain so that
bytes from offset
.Fa off
are writable.
When it meets read-only mbufs, it allocates new mbufs, adjusts chain as
When it meets read-only mbufs, it allocates new mbufs, adjusts the chain as
.Fn m_copyback_cow
does, and copies original contents into them.
does, and copies the original content into them.
The
.Fa how
parameter is a choice of
.Dv M_WAIT / M_DONTWAIT
from caller.
from the caller.
.Fn m_makewritable
preserves the contents of the mbuf chain even in the case of failure.
It updates a pointer to the mbuf chain pointed by
It updates a pointer to the mbuf chain pointed to by
.Fa mp .
It returns 0 on success.
Otherwise, it returns an error code, typically
.Dv ENOBUFS .
.Er ENOBUFS .
.It Fn m_cat "struct mbuf *m" "struct mbuf *n"
Concatenates mbuf chain
.Fa n