commit bfdb8be5c49d8fadb25118fb4416ab2a68fc3a16
Author: Karel Zak <kzak@redhat.com>
Date:   Thu Oct 25 12:29:51 2007 +0200

    losetup: canonicalize loopfile name
    
    When setting up a loop device, canonicalize the loop file
    name. This simplifies a later identification of loop file names
    when querying the loop devices.
    
    Co-Author: Matthias Koenig <mkoenig@suse.de>
    Signed-off-by: Matthias Koenig <mkoenig@suse.de>
    Signed-off-by: Karel Zak <kzak@redhat.com>

Index: util-linux-ng-2.13.1/mount/lomount.c
===================================================================
--- util-linux-ng-2.13.1.orig/mount/lomount.c
+++ util-linux-ng-2.13.1/mount/lomount.c
@@ -22,10 +22,12 @@
 #include "lomount.h"
 #include "xstrncpy.h"
 #include "nls.h"
+#include "realpath.h"
+#include "xmalloc.h"
+
 
 extern int verbose;
 extern char *progname;
-extern char *xstrdup (const char *s);	/* not: #include "sundries.h" */
 extern void error (const char *fmt, ...);	/* idem */
 
 #define SIZE(a) (sizeof(a)/sizeof(a[0]))
@@ -279,6 +281,7 @@ set_loop(const char *device, const char 
 	struct loop_info64 loopinfo64;
 	int fd, ffd, mode, i;
 	char *pass;
+	char filename[PATH_MAX+1];
 
 	mode = (*loopro ? O_RDONLY : O_RDWR);
 	if ((ffd = open(file, mode)) < 0) {
@@ -298,7 +301,8 @@ set_loop(const char *device, const char 
 
 	memset(&loopinfo64, 0, sizeof(loopinfo64));
 
-	xstrncpy(loopinfo64.lo_file_name, file, LO_NAME_SIZE);
+	myrealpath(file, filename, PATH_MAX);
+	xstrncpy(loopinfo64.lo_file_name, filename, LO_NAME_SIZE);
 
 	if (encryption && *encryption) {
 		if (digits_only(encryption)) {
@@ -386,7 +390,7 @@ set_loop(const char *device, const char 
 
 	if (verbose > 1)
 		printf(_("set_loop(%s,%s,%llu): success\n"),
-		       device, file, offset);
+		       device, filename, offset);
 	return 0;
 }
 
@@ -470,23 +474,6 @@ usage(void) {
 	exit(1);
  }
 
-char *
-xstrdup (const char *s) {
-	char *t;
-
-	if (s == NULL)
-		return NULL;
-
-	t = strdup (s);
-
-	if (t == NULL) {
-		fprintf(stderr, _("not enough memory"));
-		exit(1);
-	}
-
-	return t;
-}
-
 void
 error (const char *fmt, ...) {
 	va_list args;
Index: util-linux-ng-2.13.1/mount/Makefile.am
===================================================================
--- util-linux-ng-2.13.1.orig/mount/Makefile.am
+++ util-linux-ng-2.13.1/mount/Makefile.am
@@ -25,7 +25,7 @@ umount_LDFLAGS = $(SUID_LDFLAGS) $(AM_LD
 
 swapon_SOURCES = swapon.c swap_constants.h $(utils_common)
 
-losetup_SOURCES = lomount.c loop.h lomount.h
+losetup_SOURCES = lomount.c loop.h lomount.h realpath.c xmalloc.c
 losetup_CPPFLAGS = -DMAIN $(AM_CPPFLAGS)
 
 mount_LDADD = $(LDADD_common)