72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
//
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// Created by haraldwolff on 21.08.22.
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//
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <getopt.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <hash.h>
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int main(int argc, char *argv[]){
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int f1 = open(argv[1], O_RDWR);
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if (f1 < 0)
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{
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printf("could not open %s (%s)\n", argv[1], strerror(errno));
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exit(EXIT_FAILURE);
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}
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long size1 = lseek(f1, 0, SEEK_END);
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void *mm1 = mmap(NULL, size1, PROT_READ | PROT_WRITE, MAP_SHARED, f1, 0);
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if (mm1 == MAP_FAILED){
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printf("could not mmap file.");
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exit(EXIT_FAILURE);
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}
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int f2 = open(argv[2], O_RDWR);
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if (f2 < 0)
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{
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printf("could not open %s (%s)\n", argv[2], strerror(errno));
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exit(EXIT_FAILURE);
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}
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long size2 = lseek(f2, 0, SEEK_END);
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void *mm2 = mmap(NULL, size2, PROT_READ | PROT_WRITE, MAP_SHARED, f2, 0);
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if (mm2 == MAP_FAILED){
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printf("could not mmap file.");
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exit(EXIT_FAILURE);
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}
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long offset = 0;
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u_int64_t *t1 = (u_int64_t *)mm1;
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u_int64_t *t2 = (u_int64_t *)mm2;
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while (offset < size1) {
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uint64_t h1 = dhash( &t1[(offset >> 3)], 4096);
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uint64_t h2 = dhash( &t2[(offset >> 3)], 4096);
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if (h1 != h2) {
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fprintf(stdout,"\r%0lx %0lx %0lx\n", offset, h1, h2);
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fflush(stdout);
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}
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offset += 4096;
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fprintf(stdout, "\roffset: 0x%llx %d%%", offset, (100 * offset / size1));
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fflush(stdout);
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}
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munmap(mm1, size1);
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munmap(mm2, size2);
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close(f1);
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close(f2);
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} |