1 /*
2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
3 */
4
5 #include <stdio.h>
6 #include <sys/types.h>
7 #include <sys/stat.h>
8 #include <fcntl.h>
9 #include <linux/fs.h>
10 #include <errno.h>
11
main(int argc,char ** argv)12 int main(int argc, char **argv)
13 {
14 int fd;
15 int block;
16 int first_block;
17 int last_block;
18 int totals_block;
19 int fragments;
20 int i;
21 int n;
22
23 for (n = 1; n < argc; n++) {
24 if (argc < 2) {
25 printf
26 ("Used to see file maps \nUsage: %s filename1 [[..[filename2]...filename(N-1)] filenameN]\n",
27 argv[0]);
28 return 0;
29 }
30 fd = open(argv[n], O_RDONLY);
31 if (fd == -1) {
32 perror("open failed");
33 continue;
34 }
35 // printf ("file %s occupies blocks: \n", argv[1]);
36 // printf ("START\tEND\tCOUNT\n");
37 i = 0;
38 block = 0;
39 first_block = 0;
40 last_block = 0;
41 fragments = 0;
42 totals_block = 0;
43
44 while (ioctl(fd, FIBMAP, &block) == 0) {
45 if (first_block == 0) {
46 last_block = block - 1;
47 first_block = block;
48 }
49 if (block != last_block + 1) {
50 // printf ("%d\t%d\t%d\n",first_block,last_block,last_block-first_block+1);
51 totals_block += last_block - first_block + 1;
52 fragments++;
53 first_block = block;
54 last_block = block;
55 } else {
56 last_block++;
57 }
58
59 if (!block) {
60 //printf ("Fragments: %d\tBlocks: %d\n",fragments,totals_block);
61 //printf ("%d:%d\t",fragments,totals_block);
62 //if (fragments == 1) printf(".",totals_block);
63 //else printf("%d_",fragments,totals_block);
64 printf("%d\n", fragments);
65 break;
66 }
67
68 i++;
69 block = i;
70 }
71 if (errno) {
72 perror("FIBMAP failed");
73 }
74 close(fd);
75 // printf ("\n");
76 }
77 return 0;
78 }
79