chksum.c

// Problem: iPhone created some files that are all 0s (NUL bytes)
// Solution: chksum each file, delete those which are all 0
// eg: 
// cd "/Users/aaron/Pictures/Photos Library.photoslibrary/originals"
// find . -name "*.jp*g" -exec sh -c 'cat {} | chksum ; if [ $? -eq 0 ]; then echo {}; rm {} ; fi' \;                                                      

#include <stdio.h>
#include <stdlib.h>

int main()
{
    long int chksum = 0;
    int c;
    while ((c = getchar()) != EOF)
    {
        chksum += c;
    }
    printf("%ld\n",chksum);
    return chksum || chksum>>32;
}