diff options
Diffstat (limited to 'lib/libc/sys/recv.2')
| -rw-r--r-- | lib/libc/sys/recv.2 | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/lib/libc/sys/recv.2 b/lib/libc/sys/recv.2 index 3acd694..9d85d2b 100644 --- a/lib/libc/sys/recv.2 +++ b/lib/libc/sys/recv.2 @@ -52,9 +52,11 @@ .Ft ssize_t .Fn recvmsg "int s" "struct msghdr *msg" "int flags" .Sh DESCRIPTION -.Fn Recvfrom +The +.Fn recvfrom and .Fn recvmsg +system calls are used to receive messages from a socket, and may be used to receive data on a socket whether or not it is connection-oriented. @@ -72,7 +74,7 @@ address stored there. .Pp The .Fn recv -call is normally used only on a +function is normally used only on a .Em connected socket (see .Xr connect 2 ) @@ -111,11 +113,13 @@ described in .Pp The .Xr select 2 -call may be used to determine when more data arrive. +system call may be used to determine when more data arrive. .Pp The .Fa flags -argument to a recv call is formed by +argument to a +.Fn recv +function is formed by .Em or Ap ing one or more of the values: .Bl -column MSG_WAITALL -offset indent @@ -142,7 +146,7 @@ or the next data to be received is of a different type than that returned. .Pp The .Fn recvmsg -call uses a +system call uses a .Fa msghdr structure to minimize the number of directly supplied parameters. This structure has the following form, as defined in @@ -192,7 +196,7 @@ As an example, one could use this to learn of changes in the data-stream in XNS/SPP, or in ISO, to obtain user-connection-request data by requesting a recvmsg with no data buffer provided immediately after an .Fn accept -call. +system call. .Pp Open file descriptors are now passed as ancillary data for .Dv AF_UNIX @@ -291,5 +295,5 @@ address space. .Sh HISTORY The .Fn recv -function call appeared in +function appeared in .Bx 4.2 . |
