backtrace: Make backtrace_capture() work on more systems.

[openvswitch] / utilities / ovs-vsctl.8.in

diff --git a/utilities/ovs-vsctl.8.in b/utilities/ovs-vsctl.8.in
index ee76b83215b7d867da88cb0f9a3904788603f1f1..fcfec024654661a70c024c5fd37a8e8dec1fe2b9 100644 (file)
--- a/utilities/ovs-vsctl.8.in
+++ b/utilities/ovs-vsctl.8.in
@@ -596,6 +596,11 @@ For a map column, without \fB\-\-if\-exists\fR it is an error if
 If \fB@\fIname\fR is specified, then the UUID for \fIrecord\fR may be
 referred to by that name later in the same \fBovs\-vsctl\fR
 invocation in contexts where a UUID is expected.
+.IP
+Both \fB\-\-id\fR and the \fIcolumn\fR arguments are optional, but
+usually at least one or the other should be specified.  If both are
+omitted, then \fBget\fR has no effect except to verify that
+\fIrecord\fR exists in \fItable\fR.
 .
 .IP "\fBset \fItable record column\fR[\fB:\fIkey\fR]\fB=\fIvalue\fR..."
 Sets the value of each specified \fIcolumn\fR in the given
@@ -657,12 +662,13 @@ this.
 Deletes each specified \fIrecord\fR from \fItable\fR.  Unless
 \fB\-\-if\-exists\fR is specified, each \fIrecord\fRs must exist.
 .IP
-It is often unnecessary to specify explicit \fBdestroy\fR commands,
-because (except for records in the \fBQoS\fR or \fBQueue\fR tables)
-records that are not reachable from the \fBOpen_vSwitch\fR table are
-automatically deleted from the database.  This means that deleting the
-last reference to a record is sufficient for deleting the record
-itself.  See the \fBEXAMPLES\fR section below for more information.
+The \fBdestroy\fR command is only useful for records in the \fBQoS\fR
+or \fBQueue\fR tables.  Records in other tables are automatically
+deleted from the database when they become unreachable from the
+\fBOpen_vSwitch\fR table.  This means that deleting the last reference
+to a record is sufficient for deleting the record itself.  For records
+in these tables, \fBdestroy\fR is silently ignored.  See the
+\fBEXAMPLES\fR section below for more information.
 .
 .IP "\fBwait\-until \fItable record \fR[\fIcolumn\fR[\fB:\fIkey\fR]\fB=\fIvalue\fR]..."
 Waits until \fItable\fR contains a record named \fIrecord\fR whose