error in reading frame-buffer device

[shubhendu <97co266@xxxxxxxxxxxxxxxxxxxxx>]

dear friends 

i want to open  /dev/fb* for doing ioctl on it 
my problem is open always returns -1 
what may be the reason ??

the code is given below 

one more observation if i try to use "cp" on /dev/fb[0-7] 
system says that /dev/fb1 : no such device but "ls" shows its 
there
ex.

[root $] cp /dev/fb1 ~shubh/frameb
cp : /dev/fb1 : no such device 




the code of the program is as following 
 
  
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
int main()
{
        int fbfd = 0;

        fbfd = open("/dev/fb0", O_RDWR);
        if (fbfd<0) {
                printf("Error: cannot open framebuffer device.\n");
                printf("%d",fbfd)      /***** this prints -1 *******/
                exit(1);
        }
        printf("The framebuffer device was opened successfully.\n");

        close(fbfd);
        return 0;
}



TIA




shubh
REC-Surat
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