1 /*
2 * DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
3 * Version 2, December 2004
4 *
5 * Copyright (C) 2016 Olaf Wintermann <olaf.wintermann@gmail.com>
6 *
7 * Everyone is permitted to copy and distribute verbatim or modified
8 * copies of this license document, and changing it is allowed as long
9 * as the name is changed.
10 *
11 * DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
12 * TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
13 *
14 * 0. You just DO WHAT THE FUCK YOU WANT TO.
15 */
16
17 /*
18 * tool for copying extended attributes on FreeBSD
19 */
20
21 #include <sys/types.h>
22 #include <sys/extattr.h>
23
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <unistd.h>
27 #include <fcntl.h>
28
29 int main(int argc, char **argv) {
30 if(argc < 3) {
31 fprintf(stderr, "usage: %s <srcfile> <destfile>\n", argv[0]);
32 return -1;
33 }
34
35 int src = open(argv[1], O_RDONLY);
36 if(src == -1) {
37 fprintf(stderr, "Cannot open %s: ", argv[1]);
38 perror(NULL);
39 return -1;
40 }
41
42 int dst = open(argv[2], O_WRONLY);
43 if(dst == -1) {
44 fprintf(stderr, "Cannot open %s: ", argv[2]);
45 perror(NULL);
46 return -1;
47 }
48
49 // get length of attributes list
50 ssize_t lslen = extattr_list_fd(src, EXTATTR_NAMESPACE_USER, NULL, 0);
51 if(lslen < 0) {
52 perror("extattr_list_fd");
53 return -1;
54 }
55 if(lslen == 0) {
56 return 0;
57 }
58
59 // get attributes list
60 char *list = malloc(lslen + 1);
61 lslen = extattr_list_fd(src, EXTATTR_NAMESPACE_USER, list, lslen);
62 if(lslen < 0) {
63 perror("extattr_list_fd");
64 return -1;
65 }
66
67 for(int i=0;i<lslen;i++) {
68 char namelen = list[i];
69 char *name = list + i + 1;
70
71 char nextlen = list[i + namelen + 1]; // save length of next name
72 list[i + namelen + 1] = '\0'; // terminate string temporary
73
74 // get xattr from src and add it to dst
75 printf("%s\n", name);
76 ssize_t len = extattr_get_fd(src, EXTATTR_NAMESPACE_USER, name, NULL, 0);
77 if(len > 0) {
78 char *value = malloc(len);
79 len = extattr_get_fd(src, EXTATTR_NAMESPACE_USER, name, value, len);
80 if(len > 0) {
81 if(extattr_set_fd(dst, EXTATTR_NAMESPACE_USER, name, value, len) == -1) {
82 perror("extattr_set_fd");
83 }
84 } else {
85 perror("extattr_get_fd");
86 }
87 free(value);
88 } else {
89 perror("extattr_get_fd");
90 }
91
92 list[i + namelen + 1] = nextlen; // restore length
93 i += namelen;
94 }
95
96 return 0;
97 }
98