csu3_am335x/EVSE/Projects/CCS/Apps/UpdateRootfs.c

/*===========================================================================
                    Combined Charging System (CCS): SECC
                              UpdateRootfs.c

                        initiated by Vern, Joseph
                           (since 2019/07/19)
=============================================================================*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/termios.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/mman.h>
#include <linux/sockios.h>
#include <linux/socket.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/time.h>
#include <sys/timeb.h>
#include <math.h>//for pow
#include "define.h"
#include "UpdateRootfs.h"

int main(int argc, char *argv[])
{
    unsigned int MaxLen = 25 * 1024 * 1024, ImageLen = 0;
    unsigned char *ptr;
    int fd, wrd;

    ptr = malloc(MaxLen);

    if(ptr == NULL)
    {
        printf("UpdateRootfs NG - can not malloc\n");
        return 0;
    }

    memset(ptr, 0xFF, MaxLen);

    fd = open(argv[1], O_RDONLY);

    if(fd < 0)
    {
        printf("UpdateRootfs NG - can not open rootfs\n");
        free(ptr);
        return 0;
    }

    ImageLen = read(fd, ptr, MaxLen);
    close(fd);
    printf("ImageLen=0x%x\n", ImageLen);

    if(ImageLen < (24 * 1024 * 1024))
    {
        printf("ImageLen size mismatch\n");
        free(ptr);
        return 0;
    }

    fd = open("/dev/mtdblock8", O_RDWR);

    if(fd < 0)
    {
        printf("UpdateRootfs NG - can not open mtdblock8\n");
        free(ptr);
        return 0;
    }

    wrd = write(fd, ptr, ImageLen);
    close(fd);

    if(wrd != ImageLen)
    {
        printf("UpdateRootfs NG - wrd(0x%x) != ImageLen(0x%x)\n", wrd, ImageLen);
        free(ptr);
        return 0;
    }

    free(ptr);
    printf("UpdateRootfs OK\n");
}