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libcutils: klog inherit android_get_control_file("/dev/kmsg")

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If the file descriptor is in the environment, use it.

Test: compile
Bug: 32450474
Change-Id: Id208b11b727a44dc861a141130a644d7d8009c5f
This commit is contained in:
Mark Salyzyn 2016-10-27 08:13:42 -07:00
parent 77fdb22cf6
commit c377843258
1 changed files with 6 additions and 1 deletions
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7
libcutils/klog.cpp
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@ -24,6 +24,7 @@
#include <sys/types.h>
#include <unistd.h>
#include <cutils/files.h>
#include <cutils/klog.h>
static int klog_level = KLOG_DEFAULT_LEVEL;
@ -37,7 +38,11 @@ void klog_set_level(int level) {
}
static int __open_klog(void) {
return TEMP_FAILURE_RETRY(open("/dev/kmsg", O_WRONLY | O_CLOEXEC));
static const char kmsg_device[] = "/dev/kmsg";
int ret = android_get_control_file(kmsg_device);
if (ret >= 0) return ret;
return TEMP_FAILURE_RETRY(open(kmsg_device, O_WRONLY | O_CLOEXEC));
}
#define LOG_BUF_MAX 512