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platform_system_core
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logd: make behavior more consistent across builds. 

Bug: 110127913
Test: boots
Change-Id: I0c1efacfb5ac0407e896ddde0bcc63927edc0525
This commit is contained in:
Elliott Hughes 2018-06-13 10:33:45 -07:00
parent 7222199281
commit cef62b4014
1 changed files with 16 additions and 21 deletions
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37
logd/main.cpp
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@ -87,30 +87,25 @@
//
static int drop_privs(bool klogd, bool auditd) {
// Tricky, if ro.build.type is "eng" then this is true because of the
// side effect that ro.debuggable == 1 as well, else it is false.
bool eng =
__android_logger_property_get_bool("ro.build.type", BOOL_DEFAULT_FALSE);
struct sched_param param;
memset(&param, 0, sizeof(param));
sched_param param = {};
if (set_sched_policy(0, SP_BACKGROUND) < 0) {
android::prdebug("failed to set background scheduling policy");
if (!eng) return -1;
return -1;
}
if (sched_setscheduler((pid_t)0, SCHED_BATCH, &param) < 0) {
android::prdebug("failed to set batch scheduler");
if (!eng) return -1;
return -1;
}
if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) {
android::prdebug("failed to set background cgroup");
if (!eng) return -1;
return -1;
}
if (!eng && (prctl(PR_SET_DUMPABLE, 0) < 0)) {
if (__android_logger_property_get_bool("ro.debuggable", BOOL_DEFAULT_FALSE) &&
prctl(PR_SET_DUMPABLE, 0) == -1) {
android::prdebug("failed to clear PR_SET_DUMPABLE");
return -1;
}
@ -133,24 +128,24 @@ static int drop_privs(bool klogd, bool auditd) {
android::prdebug(
"failed to set CAP_SETGID, CAP_SYSLOG or CAP_AUDIT_CONTROL (%d)",
errno);
if (!eng) return -1;
return -1;
}
gid_t groups[] = { AID_READPROC };
if (setgroups(arraysize(groups), groups) == -1) {
android::prdebug("failed to set AID_READPROC groups");
if (!eng) return -1;
return -1;
}
if (setgid(AID_LOGD) != 0) {
android::prdebug("failed to set AID_LOGD gid");
if (!eng) return -1;
return -1;
}
if (setuid(AID_LOGD) != 0) {
android::prdebug("failed to set AID_LOGD uid");
if (!eng) return -1;
return -1;
}
if (cap_set_flag(caps.get(), CAP_PERMITTED, 1, cap_value, CAP_CLEAR) < 0) {
@ -161,7 +156,7 @@ static int drop_privs(bool klogd, bool auditd) {
}
if (cap_set_proc(caps.get()) < 0) {
android::prdebug("failed to clear CAP_SETGID (%d)", errno);
if (!eng) return -1;
return -1;
}
return 0;
@ -468,7 +463,7 @@ int main(int argc, char* argv[]) {
bool auditd =
__android_logger_property_get_bool("ro.logd.auditd", BOOL_DEFAULT_TRUE);
if (drop_privs(klogd, auditd) != 0) {
return -1;
return EXIT_FAILURE;
}
// Serves the purpose of managing the last logs times read on a
@ -496,7 +491,7 @@ int main(int argc, char* argv[]) {
LogReader* reader = new LogReader(logBuf);
if (reader->startListener()) {
exit(1);
return EXIT_FAILURE;
}
// LogListener listens on /dev/socket/logdw for client
@ -506,7 +501,7 @@ int main(int argc, char* argv[]) {
LogListener* swl = new LogListener(logBuf, reader);
// Backlog and /proc/sys/net/unix/max_dgram_qlen set to large value
if (swl->startListener(600)) {
exit(1);
return EXIT_FAILURE;
}
// Command listener listens on /dev/socket/logd for incoming logd
@ -514,7 +509,7 @@ int main(int argc, char* argv[]) {
CommandListener* cl = new CommandListener(logBuf, reader, swl);
if (cl->startListener()) {
exit(1);
return EXIT_FAILURE;
}
// LogAudit listens on NETLINK_AUDIT socket for selinux
@ -549,5 +544,5 @@ int main(int argc, char* argv[]) {
TEMP_FAILURE_RETRY(pause());
exit(0);
return EXIT_SUCCESS;
}