diff --git a/winsup/utils/ChangeLog b/winsup/utils/ChangeLog
index 104ebecea..2576fbe2e 100644
--- a/winsup/utils/ChangeLog
+++ b/winsup/utils/ChangeLog
@@ -1,3 +1,11 @@
+2000-06-07  Kazuhiro Fujieda <fujieda@jaist.ac.jp>
+
+        mount.cc (error): New function to report an error and exit.
+        umount.cc (error): Ditto.
+        (remove_all_automounts): Check return status of cygwin_umount.
+        (remove_all_user_mounts): Ditto.
+        (remove_all_system_mounts): Ditto.
+
 2000-06-05  DJ Delorie  <dj@cygnus.com>
 
 	* mount.cc: add stdlib.h for exit
diff --git a/winsup/utils/mount.cc b/winsup/utils/mount.cc
index 6227eb38e..e41038f4a 100644
--- a/winsup/utils/mount.cc
+++ b/winsup/utils/mount.cc
@@ -30,6 +30,14 @@ static short force = FALSE;
 
 static const char *progname;
 
+static void
+error (const char *path)
+{
+  fprintf (stderr, "%s: %s: %s\n", progname, path,
+	   (errno == EMFILE) ? "Too many mount entries" : strerror (errno));
+  exit (1);
+}
+
 /* FIXME: do_mount should also print a warning message if the dev arg
    is a non-existent Win32 path. */
 
@@ -59,10 +67,7 @@ do_mount (const char *dev, const char *where, int flags)
 #endif
 
   if (mount (dev, where, flags))
-    {
-      perror ("mount failed");
-      exit (1);
-    }
+    error (where);
 
   if (statres == -1)
     {
@@ -159,8 +164,7 @@ main (int argc, const char **argv)
   if ((force == FALSE) && (mount_already_exists (argv[i + 1], flags)))
     {
       errno = EBUSY;
-      perror ("mount failed");
-      exit (1);
+      error (argv[i + 1]);
     }
   else
     do_mount (argv[i], argv[i + 1], flags);
@@ -232,10 +236,7 @@ change_cygdrive_prefix (const char *new_prefix, int flags)
   flags |= MOUNT_AUTO;
 
   if (mount (NULL, new_prefix, flags))
-    {
-      perror ("mount failed");
-      exit (1);
-    }
+    error (new_prefix);
   
   exit (0);
 }
diff --git a/winsup/utils/umount.cc b/winsup/utils/umount.cc
index 6405ed90b..7623c5f97 100644
--- a/winsup/utils/umount.cc
+++ b/winsup/utils/umount.cc
@@ -13,6 +13,7 @@ details. */
 #include <sys/mount.h>
 #include <mntent.h>
 #include <stdlib.h>
+#include <errno.h>
 
 static void remove_all_mounts ();
 static void remove_all_automounts ();
@@ -34,6 +35,13 @@ usage (void)
   exit (1);
 }
 
+static void
+error (char *path)
+{
+  fprintf (stderr, "%s: %s: %s\n", progname, path, strerror (errno));
+  exit (1);
+}
+
 int
 main (int argc, char **argv)
 {
@@ -81,10 +89,7 @@ main (int argc, char **argv)
     usage ();
 
   if (cygwin_umount (argv[i], flags) != 0)
-    {
-      perror ("umount");
-      exit (1);
-    }
+    error (argv[i]);
 
   return 0;
 }
@@ -109,14 +114,18 @@ remove_all_automounts ()
       /* Remove the mount if it's an automount. */
       if (strcmp (p->mnt_type, "user,auto") == 0)
 	{
-	  cygwin_umount (p->mnt_dir, 0);
+	  if (cygwin_umount (p->mnt_dir, 0))
+	    error (p->mnt_dir);
+
 	  /* We've modified the table so we need to start over. */
 	  endmntent (m);
 	  m = setmntent ("/-not-used-", "r");
 	}
       else if (strcmp (p->mnt_type, "system,auto") == 0)
 	{
-	  cygwin_umount (p->mnt_dir, MOUNT_SYSTEM);
+	  if (cygwin_umount (p->mnt_dir, MOUNT_SYSTEM))
+	    error (p->mnt_dir);
+
 	  /* We've modified the table so we need to start over. */
 	  endmntent (m);
 	  m = setmntent ("/-not-used-", "r");
@@ -132,14 +141,14 @@ remove_all_user_mounts ()
 {
   FILE *m = setmntent ("/-not-used-", "r");
   struct mntent *p;
-  int err;
 
   while ((p = getmntent (m)) != NULL)
     {
       /* Remove the mount if it's a user mount. */
       if (strncmp (p->mnt_type, "user", 4) == 0)
 	{
-	  err = cygwin_umount (p->mnt_dir, 0);
+	  if (cygwin_umount (p->mnt_dir, 0))
+	    error (p->mnt_dir);
 
 	  /* We've modified the table so we need to start over. */
 	  endmntent (m);
@@ -162,7 +171,8 @@ remove_all_system_mounts ()
       /* Remove the mount if it's a system mount. */
       if (strncmp (p->mnt_type, "system", 6) == 0)
 	{
-	  cygwin_umount (p->mnt_dir, MOUNT_SYSTEM);
+	  if (cygwin_umount (p->mnt_dir, MOUNT_SYSTEM))
+	    error (p->mnt_dir);
 
 	  /* We've modified the table so we need to start over. */
 	  endmntent (m);