system/freebsd-src
system/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src synced 2024-09-06 17:18:32 +00:00
Code Issues Packages Projects Releases Wiki Activity

Document the MSG_DONTWAIT flag.

Browse source
This commit is contained in:
Hartmut Brandt 2004-07-16 17:15:37 +00:00
parent 7051c84dd3
commit b711f5ddea
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=132257
1 changed files with 8 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
lib/libc/sys/recv.2
View file

@ -124,10 +124,11 @@ argument to a
function is formed by
.Em or Ap ing
one or more of the values:
.Bl -column MSG_WAITALL -offset indent
.Bl -column MSG_DONTWAIT -offset indent
.It Dv MSG_OOB Ta process out-of-band data
.It Dv MSG_PEEK Ta peek at incoming message
.It Dv MSG_WAITALL Ta wait for full request or error
.It Dv MSG_DONTWAIT Ta don't block
.El
.Pp
The
@ -145,6 +146,12 @@ the full request is satisfied.
However, the call may still return less data than requested
if a signal is caught, an error or disconnect occurs,
or the next data to be received is of a different type than that returned.
The MSG_DONTWAIT flag requests the call to return when it would block otherwise.
If no data is available
.Va errno
is set to
.Er EAGAIN .
This flag is not available in strict ANSI or C99 compilation mode.
.Pp
The
.Fn recvmsg