Allow the specification of a mountpoint, and resolve it s disk device

using the fstab.

Closes  PR bin/129.

Submitted by:	jmg@nike.efn.org (John-Mark Gurney)

1 files changed, 16 insertions, 1 deletions

diff --git a/sbin/fsck/preen.c b/sbin/fsck/preen.c
index 413e4d4ff594..a35182e273f0 100644
--- a/sbin/fsck/preen.c
+++ b/sbin/fsck/preen.c
@@ -45,6 +45,7 @@ static const char sccsid[] = "@(#)preen.c	8.1 (Berkeley) 6/5/93";
 #include <unistd.h>
 #include <stdlib.h>
 #include <ctype.h>
+#include <fstab.h>
 #include "fsck.h"
 
 struct part {
@@ -292,7 +293,8 @@ blockcheck(name)
 {
 	struct stat stslash, stblock, stchar;
 	char *raw;
-	int retried = 0;
+	struct fstab *fsinfo;
+	int retried = 0, l;
 
 	hotroot = 0;
 	if (stat("/", &stslash) < 0) {
@@ -325,6 +327,19 @@ retry:
 		name = unrawname(name);
 		retried++;
 		goto retry;
+	} else if ((stblock.st_mode & S_IFMT) == S_IFDIR && !retried) {
+		l = strlen(name) - 1;
+		if (l > 0 && name[l] == '/')
+			/* remove trailing slash */
+			name[l] = '\0';
+		if(!(fsinfo=getfsfile(name))) {
+			printf("Can't resolve %s to character special device",
+			    name);
+			return (0);
+		}
+		name = fsinfo->fs_spec;
+		retried++;
+		goto retry;
 	}
 	printf("Can't make sense out of name %s\n", name);
 	return (0);