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Add flag for overwriting properties with system values

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This adds the flag TW_OVERRIDE_SYSTEM_PROPS which can contain
a ";" separated list of properties that should be overriden.

A different source property can be defined by separating
target and source using "="

Example:

TW_OVERRIDE_SYSTEM_PROPS := "ro.build.product;ro.build.fingerprint=ro.system.build.fingerprint"

This will override ro.build.product with the value of ro.build.product from system/build.prop.
And also override ro.build.fingerprint with the value of ro.system.build.fingerprint.

with their corresponding values from the system partition.

Change-Id: Ibcd3e6ed51fa7f7195ad524e606a2b9542687e55
This commit is contained in:
Chaosmaster
2020-02-08 00:10:05 +01:00
committed by bigbiff
parent 461e39fe89
commit 01a17998da
1 changed files with 26 additions and 0 deletions
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26
twrp.cpp
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@@ -147,6 +147,32 @@ int main(int argc, char **argv) {
LOGINFO("SAR-DETECT: No build.prop found, falling back to %s\n", fallback_sar ? "SAR" : "Non-SAR");
property_set("ro.twrp.sar", fallback_sar ? "1" : "0");
}
// We are doing this here during SAR-detection, since we are mounting the system-partition anyway
// This way we don't need to remount it later, just for overriding properties
#if defined(TW_INCLUDE_LIBRESETPROP) && defined(TW_OVERRIDE_SYSTEM_PROPS)
stringstream override_props(EXPAND(TW_OVERRIDE_SYSTEM_PROPS));
string current_prop;
while (getline(override_props, current_prop, ';')) {
string other_prop;
if (current_prop.find("=") != string::npos) {
other_prop = current_prop.substr(current_prop.find("=") + 1);
current_prop = current_prop.substr(0, current_prop.find("="));
} else {
other_prop = current_prop;
}
string sys_val = TWFunc::System_Property_Get(other_prop, SarPartitionManager, "/s");
if (!sys_val.empty()) {
LOGINFO("Overriding %s with value: \"%s\" from system property %s\n", current_prop.c_str(), sys_val.c_str(), other_prop.c_str());
int error = TWFunc::Property_Override(current_prop, sys_val);
if (error) {
LOGERR("Failed overriding property %s, error_code: %d\n", current_prop.c_str(), error);
}
} else {
LOGINFO("Not overriding %s with empty value from system property %s\n", current_prop.c_str(), other_prop.c_str());
}
}
#endif
SarPartitionManager.UnMount_By_Path("/s", false);
} else {
LOGINFO("SAR-DETECT: Could not mount system partition, falling back to %s\n", fallback_sar ? "SAR":"Non-SAR");