/*
* DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
* Version 2, December 2004
*
* Copyright (C) 2016 Olaf Wintermann <olaf.wintermann@gmail.com>
*
* Everyone is permitted to copy and distribute verbatim or modified
* copies of this license document, and changing it is allowed as long
* as the name is changed.
*
* DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
* TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
*
* 0. You just DO WHAT THE FUCK YOU WANT TO.
*/
/*
* tool for copying extended attributes on FreeBSD
*/
#include <sys/types.h>
#include <sys/extattr.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
int main(int argc, char **argv) {
if(argc < 3) {
fprintf(stderr, "usage: %s <srcfile> <destfile>\n", argv[0]);
return -1;
}
int src = open(argv[1], O_RDONLY);
if(src == -1) {
fprintf(stderr, "Cannot open %s: ", argv[1]);
perror(NULL);
return -1;
}
int dst = open(argv[2], O_WRONLY);
if(dst == -1) {
fprintf(stderr, "Cannot open %s: ", argv[2]);
perror(NULL);
return -1;
}
// get length of attributes list
ssize_t lslen = extattr_list_fd(src, EXTATTR_NAMESPACE_USER, NULL, 0);
if(lslen < 0) {
perror("extattr_list_fd");
return -1;
}
if(lslen == 0) {
return 0;
}
// get attributes list
char *list = malloc(lslen + 1);
lslen = extattr_list_fd(src, EXTATTR_NAMESPACE_USER, list, lslen);
if(lslen < 0) {
perror("extattr_list_fd");
return -1;
}
for(int i=0;i<lslen;i++) {
char namelen = list[i];
char *name = list + i + 1;
char nextlen = list[i + namelen + 1]; // save length of next name
list[i + namelen + 1] = '\0'; // terminate string temporary
// get xattr from src and add it to dst
printf("%s\n", name);
ssize_t len = extattr_get_fd(src, EXTATTR_NAMESPACE_USER, name, NULL, 0);
if(len > 0) {
char *value = malloc(len);
len = extattr_get_fd(src, EXTATTR_NAMESPACE_USER, name, value, len);
if(len > 0) {
if(extattr_set_fd(dst, EXTATTR_NAMESPACE_USER, name, value, len) == -1) {
perror("extattr_set_fd");
}
} else {
perror("extattr_get_fd");
}
free(value);
} else {
perror("extattr_get_fd");
}
list[i + namelen + 1] = nextlen; // restore length
i += namelen;
}
return 0;
}