Android filesystem system rw(read/write) permission

/*********************************************************************************
 *           Android filesystem system rw(read/write) permission
 * 说明：
 *     Android system读写权限设置。
 *
 *                                              2017-10-31 深圳 南山平山村 曾剑锋
 ********************************************************************************/
 
一、修改文件：
    device/fsl/sabresd_6dq/fstab.freescale
 
二、root@sabresd:/ # cat fstab.freescale
    # Android fstab file.
    #<src>                                                  <mnt_point>         <type>    <mnt_flags and options>                       <fs_mgr_flags>
    # The filesystem that contains the filesystem checker binary (typically /system) cannot
    # specify MF_CHECK, and must come before any filesystems that do specify MF_CHECK
 
    /devices/soc0/soc./.aips-bus/.usdhc/mmc_host /mnt/media_rw/extsd vfat defaults voldmanaged=extsd:auto
    /devices/soc0/soc./.aips-bus/.usb/ci_hdrc.  /mnt/media_rw/udisk vfat defaults voldmanaged=udisk:auto
    # /dev/block/mmcblk3p5    /system      ext4    ro,barrier=1                                                                               wait,verify
    /dev/block/mmcblk3p5    /system      ext4    defaults                                                                              wait
    /dev/block/mmcblk3p4    /data        ext4    nosuid,nodev,nodiratime,noatime,nomblk_io_submit,noauto_da_alloc,errors=panic    wait,encryptable=/dev/block/mmcblk3p9
    /dev/block/mmcblk3p6    /cache       ext4    nosuid,nodev,nomblk_io_submit                                                    wait
    /dev/block/mmcblk3p7    /device      ext4    ro,nosuid,nodev                                                                  wait
    /dev/block/mmcblk3p1    /boot        emmc    defaults                                                                         defaults
    /dev/block/mmcblk3p2    /recovery    emmc    defaults                                                                         defaults
    /dev/block/mmcblk3p8    /misc        emmc    defaults                                                                         defaults
    /dev/block/mmcblk3boot0 /bootloader  emmc    defaults                                                                         defaults
    /dev/block/zram0 none swap defaults zramsize=
    root@sabresd:/ #