[swss.sh/syncd.sh] Trap only on EXIT #11590
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When using trap on SIGTERM the script will not react to the SIGTERM signal sent while a child is executing. I.e, the following script does not react on SIGTERM sent to it if it is waiting for sleep to finish: ``` trap "echo Handled SIGTERM" 0 2 3 15 echo "Before sleep" sleep inf echo "After sleep" ``` Instead, trap only on EXIT which covers also a scenario with exit on SIGINT, SIGTERM. Signed-off-by: Stepan Blyschak <stepanb@nvidia.com>
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When using trap on SIGTERM the script will not react to the SIGTERM signal sent while a child is executing. I.e, the following script does not react on SIGTERM sent to it if it is waiting for sleep to finish: ``` trap "echo Handled SIGTERM" 0 2 3 15 echo "Before sleep" sleep inf echo "After sleep" ``` Instead, trap only on EXIT which covers also a scenario with exit on SIGINT, SIGTERM. Signed-off-by: Stepan Blyschak <stepanb@nvidia.com>
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Aug 11, 2022
When using trap on SIGTERM the script will not react to the SIGTERM signal sent while a child is executing. I.e, the following script does not react on SIGTERM sent to it if it is waiting for sleep to finish: ``` trap "echo Handled SIGTERM" 0 2 3 15 echo "Before sleep" sleep inf echo "After sleep" ``` Instead, trap only on EXIT which covers also a scenario with exit on SIGINT, SIGTERM. Signed-off-by: Stepan Blyschak <stepanb@nvidia.com>
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Aug 17, 2022
When using trap on SIGTERM the script will not react to the SIGTERM signal sent while a child is executing. I.e, the following script does not react on SIGTERM sent to it if it is waiting for sleep to finish: ``` trap "echo Handled SIGTERM" 0 2 3 15 echo "Before sleep" sleep inf echo "After sleep" ``` Instead, trap only on EXIT which covers also a scenario with exit on SIGINT, SIGTERM. Signed-off-by: Stepan Blyschak <stepanb@nvidia.com>
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When using trap on SIGTERM the script will not react to the SIGTERM signal sent while a child is executing.
I.e, the following script does not react on SIGTERM sent to it if it is
waiting for sleep to finish:
On SIGTERM sent to the followig script:
"echo After sleep" shouldn't be printed, the script has to exit.
Instead, trap only on EXIT which covers also a scenario with exit on
SIGINT, SIGTERM.
Signed-off-by: Stepan Blyschak stepanb@nvidia.com
Why I did it
When NVIDIA switch is first booting FW upgrade process starts, if user does
ztp disable -yduring that process, which callsconfig reload -y -fall services will be terminated, including syncd and running FW upgrade process, however, it is observed that syncd.sh does not terminate but continues loading kernel drivers. This will cause an issue on next syncd start leading to switch init failure.How I did it
Changed the signal for trap.
How to verify it
Boot NVIDIA switch first time, do "ztp disable -y", verify after some time all services are started and running.
Which release branch to backport (provide reason below if selected)
Description for the changelog
Link to config_db schema for YANG module changes
A picture of a cute animal (not mandatory but encouraged)