https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278265
Bug ID: 278265
Summary: `route -n monitor' is quiet when redirecting its
output
Product: Base System
Version: 14.0-STABLE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: bin
Assignee: b...@freebsd.org
Reporter: o...@pcbtech.ru
Hello
It seems to me that this is an error at /sbin/route
This works fine
[qemu] ~ $ route -n monitor &
[1] 1526
[qemu] ~ $ arp -d 10.0.2.2 ; ifconfig gif0 create ; ifconfig gif0 destroy
10.0.2.2 (10.0.2.2) deleted
22:26:45.838 PID 1527 delete neigh 10.0.2.2 state REACHABLE lladdr
52:55:0a:00:02:02 iface em0
22:26:45.839 PID 0 add/repl neigh 10.0.2.2 state REACHABLE lladdr
52:55:0a:00:02:02 iface em0
22:26:45.840 PID 0 add/repl iface iface#3 gif0 admin DOWN oper DOWN mtu 1280
22:26:45.843 PID 0 add/repl iface iface#3 gif0 admin DOWN oper DOWN mtu 1280
22:26:45.843 PID 0 add/repl iface iface#3 gif0 admin DOWN oper DOWN mtu 1280
22:26:45.843 PID 0 add/repl iface iface#3 gif0 admin DOWN oper DOWN mtu 1280
22:26:45.845 PID 0 delete iface iface#3 gif0 admin DOWN oper DOWN mtu 1280
but
[qemu] ~ $ route -n monitor > temp.log &
[1] 1535
[qemu] ~ $ arp -d 10.0.2.2 ; ifconfig gif0 create ; ifconfig gif0 destroy
10.0.2.2 (10.0.2.2) deleted
[qemu] ~ $ ll temp.log
-rw-r--r-- 1 root wheel 0 Apr 8 22:26 temp.log
file is zero length, there's no output from `route -n monitor' if we redirect
it to file (or pipe within the script)
that's seems to be related w/ 14.0-RELEASE when monitor_nl() and NETLINK is
used by default as there's no such behaviour in 13.3-RELEASE
I've tested it on amd64 GENERIC (under qemu and on real hardware servers).
Found it while trying to fix wireguard wg-quick tool (see bug #275026)
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