Merge "charger: android_get_control_file on last_kmsg"

#include <linux/netlink.h>

#include <sys/socket.h>

#include <cutils/android_get_control_file.h>

#include <cutils/klog.h>

#include <cutils/misc.h>

#include <cutils/properties.h>

#define MAX_KLOG_WRITE_BUF_SZ 256

static void dump_last_kmsg(void) {

    char* buf;

    std::string buf;

    char* ptr;

    unsigned sz = 0;

    int len;

    size_t len;

    LOGW("\n");

    LOGW("*************** LAST KMSG ***************\n");

        "/proc/last_kmsg",

        // clang-format on

    };

    for (size_t i = 0; i < arraysize(kmsg); ++i) {

        buf = (char*)load_file(kmsg[i], &sz);

        if (buf && sz) break;

    for (size_t i = 0; i < arraysize(kmsg) && buf.empty(); ++i) {

        auto fd = android_get_control_file(kmsg[i]);

        if (fd >= 0) {

            android::base::ReadFdToString(fd, &buf);

        } else {

            android::base::ReadFileToString(kmsg[i], &buf);

        }

    }

    if (!buf || !sz) {

    if (buf.empty()) {

        LOGW("last_kmsg not found. Cold reset?\n");

        goto out;

    }

    len = min(sz, LAST_KMSG_MAX_SZ);

    ptr = buf + (sz - len);

    len = min(buf.size(), LAST_KMSG_MAX_SZ);

    ptr = &buf[buf.size() - len];

    while (len > 0) {

        int cnt = min(len, MAX_KLOG_WRITE_BUF_SZ);

        size_t cnt = min(len, MAX_KLOG_WRITE_BUF_SZ);

        char yoink;

        char* nl;

        ptr += cnt;

    }

    free(buf);

out:

    LOGW("\n");

    LOGW("************* END LAST KMSG *************\n");