On Sun, Aug 21, 2016 at 4:27 PM, Brian Potkin <claremont...@gmail.com>
wrote:
> Are you positive cups.service is still running while cups-browsed is
> stopping? 'systemctl status cups' in another terminal would tell you.
>
Yes
> If I use the sequence
>
> systemctl start cups cups-browsed.service
> systemctl stop cups-browsed.service
>
> it stops cups-browsed immediately here.
>
I just did:
# systemctl start cups cups-browsed.service
# systemctl status cups cups-browsed.service
cups.service - CUPS Scheduler
Loaded: loaded (/lib/systemd/system/cups.service; enabled; vendor
preset: ena
Active: active (running) since Sun 2016-08-21 09:14:34 CEST; 8h ago
...
cups-browsed.service - Make remote CUPS printers available locally
Loaded: loaded (/lib/systemd/system/cups-browsed.service; enabled;
vendor pre
Active: active (running) since Sun 2016-08-21 17:16:33 CEST; 9s ago
...
# systemctl stop cups-browsed.service
(waits 90 sec)
If I strace the cups-browsed process (all threads) during tese 90 seconds I
see it repeats the following until it gets killed:
19552 connect(10, {sa_family=AF_INET6, sin6_port=htons(631),
inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0},
28) = -1 EINPROGRESS (Operation now in progress)
19552 fcntl(10, F_SETFL, O_RDWR) = 0
19552 poll([{fd=10, events=POLLIN|POLLOUT}], 1, 100) = 1 ([{fd=10,
revents=POLLIN|POLLOUT|POLLERR|POLLHUP}])
19552 sendto(10, "POST / HTTP/1.1\r\nContent-Length:"..., 169, 0, NULL, 0)
= -1 ECONNREFUSED (Connection refused)
19552 sendto(10, "POST / HTTP/1.1\r\nContent-Length:"..., 169, 0, NULL, 0)
= -1 EPIPE (Broken pipe)
19552 --- SIGPIPE {si_signo=SIGPIPE, si_code=SI_USER, si_pid=19552,
si_uid=0} ---
19552 sendto(10, "POST / HTTP/1.1\r\nContent-Length:"..., 169, 0, NULL, 0)
= -1 EPIPE (Broken pipe)
19552 --- SIGPIPE {si_signo=SIGPIPE, si_code=SI_USER, si_pid=19552,
si_uid=0} ---
19552 close(10) = 0
19552 socket(AF_INET6, SOCK_STREAM, IPPROTO_IP) = 10
19552 setsockopt(10, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
19552 setsockopt(10, SOL_SOCKET, SO_REUSEPORT, [1], 4) = 0
19552 setsockopt(10, SOL_TCP, TCP_NODELAY, [1], 4) = 0
19552 fcntl(10, F_SETFD, FD_CLOEXEC) = 0
19552 fcntl(10, F_GETFL) = 0x2 (flags O_RDWR)
19552 fcntl(10, F_SETFL, O_RDWR|O_NONBLOCK) = 0
19552 connect(10, {sa_family=AF_INET6, sin6_port=htons(631),
inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0},
28) = -1 EINPROGRESS (Operation now in progress)
19552 fcntl(10, F_SETFL, O_RDWR) = 0
19552 poll([{fd=10, events=POLLIN|POLLOUT}], 1, 100) = 1 ([{fd=10,
revents=POLLIN|POLLOUT|POLLERR|POLLHUP}])
19552 sendto(10, "POST / HTTP/1.1\r\nContent-Length:"..., 169, 0, NULL, 0)
= -1 ECONNREFUSED (Connection refused)
...
Cheers, Roderich
