Ripfilename.c

#include <windows.h>
#include <stdio.h>

//char root_path[] = "image.wrp";
char root_path[] = "image.wrp_2.33";
//char root_path[] = "/etc/tftp/image.wrp";
//char root_path[] = "/etc/tftp/image.wrp_2_33";

static char trimrootpath(char* filename, char* version)
{
    char* begin = NULL;
    char* end = NULL;
    int ii;

    begin = strrchr(root_path, '/');
    if (begin == NULL)
        end = strchr(root_path, '_');
    else
        end = strchr(begin, '_');

    if (end == NULL)
    {
        if (begin == NULL)
        {
            strncpy(filename, root_path, strlen(root_path));
        }
        else
        {
            strncpy(filename, begin+1, strlen(begin));
        }
    }
    else
    {
        begin[end - begin] =  0x00;

        if (begin == NULL)
        {
            strncpy(filename, root_path, strlen(root_path));
        }
        else
        {
            strncpy(filename, begin+1, strlen(begin));
        }
    }

    return TRUE;
}

int main(int argc, char** arg)
{
    char filename[128+1];
    char version[128+1];
    char kernel_version[] = "v2.31";

    memset(filename, 0, sizeof(filename));
    memset(version, 0, sizeof(version));
    trimrootpath(filename, version);
    printf("%s\n", version);
    printf("%s\n", filename);

    if(strcmp(kernel_version+1, version) < 0)
        printf("kernel version < version\n");
    else if(strcmp(kernel_version, version) == 0)
        printf("kernel version equal to version");
    else
        printf("kernel version > version");

    printf("%s\n", root_path);

    system("pause");
    return 0;
}