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recv.2: Internet datagram and netlink sockets support MSG_TRUNC for recv(2) 

Internet datagram (since Linux 2.4.27/2.6.8),
and netlink (since Linux 2.6.22) sockets support
the MSG_TRUNC flag for recv(2).

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2008-12-01 11:26:48 -05:00
parent 77e75b9077
commit 857842b0cb
1 changed files with 13 additions and 4 deletions
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17
man2/recv.2
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@ -36,7 +36,7 @@
.\" Modified 1998,1999 by Andi Kleen
.\" 2001-06-19 corrected SO_EE_OFFENDER, bug report by James Hawtin
.\"
.TH RECV 2 2008-07-14 "Linux" "Linux Programmer's Manual"
.TH RECV 2 2008-12-01 "Linux" "Linux Programmer's Manual"
.SH NAME
recv, recvfrom, recvmsg \- receive a message from a socket
.SH SYNOPSIS
@ -254,9 +254,18 @@ Thus, a
subsequent receive call will return the same data.
.TP
.BR MSG_TRUNC " (since Linux 2.2)"
Return the real length of the packet, even when it was longer than
the passed buffer.
Only valid for packet sockets.
For raw
.RB ( AF_PACKET ),
Internet datagram (since Linux 2.4.27/2.6.8),
and netlink (since Linux 2.6.22) sockets:
return the real length of the packet or datagram,
even when it was longer than the passed buffer.
Not implemented for Unix domain
.RP ( unix (7))
sockets.
For use with Internet stream sockets, see
.BR tcp (7).
.TP
.BR MSG_WAITALL " (since Linux 2.2)"
This flag requests that the operation block until the full request is