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init: use platform sepolicy version indicated by /vendor.

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am: 692c3e4d38

Change-Id: I81874aea3896c1156295616f12c211e9423d5ca7
This commit is contained in:
Dan Cashman 2017-04-12 20:43:31 +00:00 • committed by android-build-merger
commit 18ff05146f
1 changed files with 19 additions and 1 deletions
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20
init/init.cpp
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@ -740,6 +740,18 @@ static bool selinux_find_precompiled_split_policy(std::string* file) {
return true;
}
static bool selinux_get_vendor_mapping_version(std::string* plat_vers) {
if (!read_first_line("/vendor/etc/selinux/plat_sepolicy_vers.txt", plat_vers)) {
PLOG(ERROR) << "Failed to read /vendor/etc/selinux/plat_sepolicy_vers.txt";
return false;
}
if (plat_vers->empty()) {
LOG(ERROR) << "No version present in plat_sepolicy_vers.txt";
return false;
}
return true;
}
static constexpr const char plat_policy_cil_file[] = "/system/etc/selinux/plat_sepolicy.cil";
static bool selinux_is_split_policy_device() { return access(plat_policy_cil_file, R_OK) != -1; }
@ -794,6 +806,12 @@ static bool selinux_load_split_policy() {
return false;
}
// Determine which mapping file to include
std::string vend_plat_vers;
if (!selinux_get_vendor_mapping_version(&vend_plat_vers)) {
return false;
}
std::string mapping_file("/system/etc/selinux/mapping/" + vend_plat_vers + ".cil");
// clang-format off
const char* compile_args[] = {
"/system/bin/secilc",
@ -801,7 +819,7 @@ static bool selinux_load_split_policy() {
"-M", "true",
// Target the highest policy language version supported by the kernel
"-c", std::to_string(max_policy_version).c_str(),
"/system/etc/selinux/mapping_sepolicy.cil",
mapping_file.c_str(),
"/vendor/etc/selinux/nonplat_sepolicy.cil",
"-o", compiled_sepolicy,
// We don't care about file_contexts output by the compiler