Fix error on copying snapshots on 7-stable or later.

svn path=/head/; revision=209627

sysutils/ufs_copy/Makefile

@@ -7,6 +7,7 @@
 
 PORTNAME=	ufs_copy
 PORTVERSION=	20060921
+PORTREVISION=	1
 CATEGORIES=	sysutils
 MASTER_SITES=	http://people.freebsd.org/~simokawa/ufs/
 DISTNAME=	ufs-${PORTVERSION}

sysutils/ufs_copy/files/patch-ufs_copy.c

@@ -0,0 +1,60 @@
+--- ufs_copy.c.orig	2006-09-21 15:28:09.000000000 +0900
++++ ufs_copy.c	2007-12-27 23:28:55.000000000 +0900
+@@ -111,9 +111,11 @@
+ main(int argc, char *argv[])
+ {
+ 	struct fstab *fs;
+-	int ch, eval=0;
++	int ch, eval=0, md;
+ 	char *snapshot = NULL;
+-	char *src, *dst;
++	char *src, *dst, *snap = NULL;
++	char mddev[256];
++	FILE *readp;
+ 
+ #ifdef USEMMAP
+ 	while ((ch = getopt(argc, argv, "aBb:ceMms:v")) != -1)
+@@ -174,6 +176,21 @@
+ 		eval = system(buf);
+ 		if (eval)
+ 			errx(eval, "mksnap_ffs failed");
++		
++		snprintf(buf, sizeof(buf),
++			 "/sbin/mdconfig -a -n -t vnode -f %s", src);
++		fprintf(stderr, "%s\n", buf);
++		readp = popen(buf, "r");
++		if (readp == NULL)
++			errx(eval, "mdconfig failed");
++		eval = fscanf(readp, "%d", &md);
++		if (eval != 1)
++			errx(eval, "mdconfig failed");
++		pclose(readp);
++		snprintf(mddev, sizeof(mddev), "/dev/md%d", md);
++		snap = src;
++		src = mddev;
++		fprintf(stderr, "attached %s as memory disk %s\n", snap, mddev);
+ 	}
+ 
+ 	if ((fs = getfsfile(src)) == NULL) {
+@@ -188,9 +205,19 @@
+ 	}
+ 
+ 	if (snapshot) {
+-		fprintf(stderr, "removing snapshot file %s ... ", src);
++		char buf[1024];
++
++		snprintf(buf, sizeof(buf),
++			 "/sbin/mdconfig -d -u %d", md);
++		fprintf(stderr, "%s\n", buf);
++		eval = system(buf);
++		if (eval)
++			errx(eval, "mdconfig failed");
++		fprintf(stderr, "detached memory disk %s\n", mddev);
++
++		fprintf(stderr, "removing snapshot file %s ... ", snap);
+ 		fflush(stderr);
+-		if (unlink(src) == 0)
++		if (unlink(snap) == 0)
+ 			fprintf(stderr, "done\n");
+ 		else
+ 			fprintf(stderr, "failed\n");