logcatd: trampoline persist.logd.logpersistd to logd.logpersistd
(cherry pick from 2591d483c83a09eb8689e6e7869b4ac0bfe418db)
Best practices so that device can set logd.logpersistd properties.
Values can be overriden with trampolines for persist.logd.logpersistd
values except as designed for empty content to keep out of the way.
This allows us to set logd.logpersistd* for a non-persistent collection
that does not survive a reboot, and to use persist.logd.logpersistd*
for persistent collection that does survive a reboot.
Added logd.logpersistd.enable to gate when logpersist service can be
run allowing the properties to be adjusted safely prior to this state
as is the case for device property.
NB: /init will complain when trying to trampoline an empty property,
this is acceptable for functionality, but may be considered
annoying from the logging perspective.
Bug: 28788401
Bug: 28813587
Bug: 28936216
Bug: 29831823
Change-Id: I97317e8eedfae4daa8e3ef39e64e7c5c23d8b573
diff --git a/logd/README.property b/logd/README.property
index 22f86b9..b2708e4 100644
--- a/logd/README.property
+++ b/logd/README.property
@@ -1,4 +1,4 @@
-The properties that logd responds to are:
+The properties that logd and friends react to are:
name type default description
ro.logd.auditd bool true Enable selinux audit daemon
@@ -10,8 +10,16 @@
ro.logd.statistics bool+ svelte+ Enable logcat -S statistics.
ro.build.type string if user, logd.statistics &
ro.logd.kernel default false.
+logd.logpersistd.enable bool auto Safe to start logpersist daemon service
+logd.logpersistd string persist Enable logpersist daemon, "logcatd"
+ turns on logcat -f in logd context.
+ Responds to logcatd, clear and stop.
+logd.logpersistd.buffer persist logpersistd buffers to collect
+logd.logpersistd.size persist logpersistd size in MB
persist.logd.logpersistd string Enable logpersist daemon, "logcatd"
- turns on logcat -f in logd context
+ turns on logcat -f in logd context.
+persist.logd.logpersistd.buffer all logpersistd buffers to collect
+persist.logd.logpersistd.size 256 logpersistd size in MB
persist.logd.size number ro Global default size of the buffer for
all log ids at initial startup, at
runtime use: logcat -b all -G <value>
@@ -45,6 +53,7 @@
persist.log.tag.<tag> string build default for log.tag.<tag>
NB:
+- auto - managed by /init
- bool+ - "true", "false" and comma separated list of "eng" (forced false if
ro.build.type is "user") or "svelte" (forced false if ro.config.low_ram is
true).