busybox: udhcpc6: return error when interface is down
Busybox dhcp will quit without error if the interface is down during a
dhcp loop. Systemd needs to restart it if such error occurs so we need
to return failures.
Tested:
systemctl start gbmc-br-dhcp
ip link set eth0 down
Dec 15 11:05:24 yscef4-nfd01.prod.google.com systemd[1]: gbmc-br-dhcp.service: Scheduled restart job, restart counter is at 2.
Dec 15 11:05:24 yscef4-nfd01.prod.google.com systemd[1]: Stopped gBMC DHCP Client.
Dec 15 11:05:24 yscef4-nfd01.prod.google.com systemd[1]: Starting gBMC DHCP Client...
Dec 15 11:05:24 yscef4-nfd01.prod.google.com systemd[1]: Started gBMC DHCP Client.
Dec 15 11:05:24 yscef4-nfd01.prod.google.com udhcpc6[4823]: udhcpc6: can't get link-local IPv6 address
Dec 15 11:05:24 yscef4-nfd01.prod.google.com systemd[1]: gbmc-br-dhcp.service: Main process exited, code=exited, status=1/FAILURE
Dec 15 11:05:24 yscef4-nfd01.prod.google.com systemd[1]: gbmc-br-dhcp.service: Failed with result 'exit-code'.
Dec 15 11:05:29 yscef4-nfd01.prod.google.com systemd[1]: gbmc-br-dhcp.service: Scheduled restart job, restart counter is at 3.
Dec 15 11:05:29 yscef4-nfd01.prod.google.com systemd[1]: Stopped gBMC DHCP Client.
Dec 15 11:05:29 yscef4-nfd01.prod.google.com systemd[1]: Starting gBMC DHCP Client...
Dec 15 11:05:29 yscef4-nfd01.prod.google.com systemd[1]: Started gBMC DHCP Client.
Dec 15 11:05:29 yscef4-nfd01.prod.google.com udhcpc6[4829]: udhcpc6: can't get link-local IPv6 address
Dec 15 11:05:29 yscef4-nfd01.prod.google.com systemd[1]: gbmc-br-dhcp.service: Main process exited, code=exited, status=1/FAILURE
Change-Id: I242b7507b8d75bd55c173a6405353ee5ac331e41
Signed-off-by: Yuxiao Zhang <yuxiaozhang@google.com>
(cherry picked from commit d2359615af1a5fc16f41e5380ebd5c8b4130e62a)
2 files changed
