from https://bugzilla.redhat.com/show_bug.cgi?id=1110401. unix.7 is not clear about socket type of ioctl_type argument of ioctl function. The description of SIOCINQ is applicable only for SOCK_STREAM socket. For SOCK_DGRAM, udp(7) man page gives correct description of SIOCINQ Changelog: reformulation of referrence to udp(7) by Michael Kerrisk Signed-off-by: Jan Chaloupka <jchaloup@xxxxxxxxxx> --- man7/unix.7 | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/man7/unix.7 b/man7/unix.7 index 1ab70d5..7c9cb36 100644 --- a/man7/unix.7 +++ b/man7/unix.7 @@ -382,7 +382,9 @@ The correct syntax is: can be: .TP .B SIOCINQ -Returns the amount of queued unread data in the receive buffer. +For +.B SOCK_STREAM +socket the function returns the amount of queued unread data in the receive buffer. The socket must not be in LISTEN state, otherwise an error .RB ( EINVAL ) is returned. @@ -402,6 +404,13 @@ defined in .\" That number is normally larger than the number of bytes of pending .\" output. Since this info is, from userland's point of view, imprecise, .\" and it may well change, probably best not to document this now. +For +.B SOCK_DGRAM +socket, +the returned value is the same as +for Internet domain datagram socket; +see +.BR udp (7). .SH ERRORS .TP .B EADDRINUSE @@ -621,4 +630,5 @@ see .BR cmsg (3), .BR capabilities (7), .BR credentials (7), -.BR socket (7) +.BR socket (7), +.BR udp (7) -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
