Merge "fs_mgr: support reading fstab based on ro.boot.hardware.platform"

}

/*

 * tries to load default fstab.<hardware> file from /odm/etc, /vendor/etc

 * or /. loads the first one found and also combines fstab entries passed

 * in from device tree.

 * Identify path to fstab file. Lookup is based on pattern

 * fstab.<hardware>, fstab.<hardware.platform> in folders

   /odm/etc, vendor/etc, or /.

 */

struct fstab *fs_mgr_read_fstab_default()

static std::string get_fstab_path()

{

    for (const char* prop : {"hardware", "hardware.platform"}) {

        std::string hw;

        if (!fs_mgr_get_boot_config(prop, &hw)) continue;

        for (const char* prefix : {"/odm/etc/fstab.", "/vendor/etc/fstab.", "/fstab."}) {

            std::string fstab_path = prefix + hw;

            if (access(fstab_path.c_str(), F_OK) == 0) {

                return fstab_path;

            }

        }

    }

    return std::string();

}

/*

 * loads the fstab file and combines with fstab entries passed in from device tree.

 */

struct fstab *fs_mgr_read_fstab_default()

{

    std::string default_fstab;

    // Use different fstab paths for normal boot and recovery boot, respectively

    if (access("/sbin/recovery", F_OK) == 0) {

        default_fstab = "/etc/recovery.fstab";

    } else if (fs_mgr_get_boot_config("hardware", &hw)) {  // normal boot

        for (const char *prefix : {"/odm/etc/fstab.","/vendor/etc/fstab.", "/fstab."}) {

            default_fstab = prefix + hw;

            if (access(default_fstab.c_str(), F_OK) == 0) break;

    } else {  // normal boot

        default_fstab = get_fstab_path();

    }

    } else {

        LWARNING << __FUNCTION__ << "(): failed to find device hardware name";

    if (default_fstab.empty()) {

        LWARNING << __FUNCTION__ << "(): failed to find device default fstab";

    }

    // combines fstab entries passed in from device tree with