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Restore default SIGPIPE handler after fork() #7

Merged
merged 1 commit into from
Apr 7, 2022
Merged

Restore default SIGPIPE handler after fork() #7

merged 1 commit into from
Apr 7, 2022

Commits on Mar 3, 2022

  1. Restore default SIGPIPE handler after fork() 

    The MQTT mosquitto library ignores SIGPIPE on purpose to "prevent
unnecessary client quits in threaded mode":

* https://github.com/eclipse/mosquitto/blob/d5970ca9985f4d3193fe7a359707723090bb13e9/lib/mosquitto.c#L112-L114
* https://github.com/eclipse/mosquitto/blob/d5970ca9985f4d3193fe7a359707723090bb13e9/src/mosquitto.c#L413

However, the default handler should be available to child processes
spawned by mqtt-exec. Hence, we reset it after fork(). Otherwise, this
causes issues when running test suites in Alpine.

See https://gitlab.alpinelinux.org/alpine/aports/-/issues/13573
    @nmeum
    nmeum committed Mar 3, 2022
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