#include <string.h>
#include <stdio.h>
#include <sys/xattr.h>

/*
 * compile:
 * gcc -W -Wall -O3 -pipe -o fxattr fxattr.c
 */

int main(int argc, char** argv) {
	ssize_t ret, pos, ret2;
	char buf[4096], buf2[4096];
	char *src, *dst;

	if (argc < 2) {
		fprintf(stderr, "fxattr - show and copy extended attributes "
			"without dereferencing symbolic links\n\n"
			"usage:\n  to show extended attributes:\n"
			"  %s <file>\n\n  to copy extended attributes:\n"
			"  %s <source file> <destination file>\n",
			argv[0], argv[0]);
		return -1;
	}

	src = argv[1];
	dst = argv[2];

	ret = listxattr(src, buf, sizeof(buf), XATTR_NOFOLLOW);
	if (ret < 0) {
		perror("listxattr()");
		return -1;
	}

	printf("%s:", src);
	for (pos = 0; pos < ret; pos += strlen(buf + pos) + 1) {
		ret2 = getxattr(src, buf + pos, buf2, sizeof(buf2), 0, XATTR_NOFOLLOW);
		if (ret2 < 0) {
			perror("getxattr()");
			return -1;
		}
		printf(" %s(%li)", buf + pos, ret2);
		if (dst) {
			if (setxattr(dst, buf + pos, buf2, ret2, 0, XATTR_NOFOLLOW) < 0) {
				perror("setxattr()");
				return -1;
			}
		}
	}
	puts("");

	return 0;
}