61e9ce6709
Will register a new event tag by name and format, and return an event-log-tags format response with the newly allocated tag. If format is not specified, then nothing will be recorded, but a pre-existing named entry will be listed. If name and format are not specified, list all dynamic entries. If name=* list all event log tag entries. Stickiness through logd crash will be managed with the tmpfs file /dev/event-log-tags and through a reboot with add_tag entries in the pmsg last logcat event log. On debug builds we retain a /data/misc/logd/event-log-tags file that aids stickiness and that can be picked up by the bugreport. If we detect truncation damage to /dev/event-log-tags, or to /data/misc/logd/event-log-tags, rebuild file with a new first line signature incorporating the time so mmap'd readers of the file can detect the possible change in shape and order. Manual testing: Make sure nc (netcat) is built for the target platform on the host: $ m nc Then the following can be used to issue a request on the platform: $ echo -n 'getEventTag name=<name> format="<format>"\0EXIT\0' | > nc -U /dev/socket/logd Test: gTest logd-unit-test --gtest_filter=getEventTag* Bug: 31456426 Change-Id: I5dacc5f84a24d52dae09cca5ee1a3a9f9207f06d
23 lines
609 B
Text
23 lines
609 B
Text
service logd /system/bin/logd
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socket logd stream 0666 logd logd
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socket logdr seqpacket 0666 logd logd
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socket logdw dgram 0222 logd logd
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file /proc/kmsg r
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file /dev/kmsg w
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user logd
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group logd system readproc
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writepid /dev/cpuset/system-background/tasks
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service logd-reinit /system/bin/logd --reinit
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oneshot
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disabled
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user logd
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group logd
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writepid /dev/cpuset/system-background/tasks
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on fs
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write /dev/event-log-tags "# content owned by logd
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"
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chown logd logd /dev/event-log-tags
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chmod 0644 /dev/event-log-tags
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restorecon /dev/event-log-tags
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