Add support for "noatime" and "nodiratime" mount flags to mount.

Change umount "-f" to mean force, and actually use umount2.
Change umount "-l" to mean "Do not free loop device".
Updates docs accordingly.
 -Erik

2 files changed, 40 insertions, 16 deletions

diff --git a/util-linux/mount.c b/util-linux/mount.c
index 456e45235..00a774a53 100644
--- a/util-linux/mount.c
+++ b/util-linux/mount.c
@@ -66,26 +66,28 @@ extern const char mtab_file[];	/* Defined in utility.c */
 
 static const char mount_usage[] = "\tmount [flags]\n"
 	"\tmount [flags] device directory [-o options,more-options]\n"
-	"\n" "Flags:\n" "\t-a:\tMount all file systems in fstab.\n"
+	"\n" "Flags:\n" 
+	"\t-a:\t\tMount all file systems in fstab.\n"
 #ifdef BB_MTAB
-	"\t-f:\t\"Fake\" mount. Add entry to mount table but don't mount it.\n"
-	"\t-n:\tDon't write a mount table entry.\n"
+	"\t-f:\t\t\"Fake\" mount. Add entry to mount table but don't mount it.\n"
+	"\t-n:\t\tDon't write a mount table entry.\n"
 #endif
 	"\t-o option:\tOne of many filesystem options, listed below.\n"
-	"\t-r:\tMount the filesystem read-only.\n"
-	"\t-t filesystem-type:\tSpecify the filesystem type.\n"
-	"\t-w:\tMount for reading and writing (default).\n"
+	"\t-r:\t\tMount the filesystem read-only.\n"
+	"\t-t fs-type:\tSpecify the filesystem type.\n"
+	"\t-w:\t\tMount for reading and writing (default).\n"
 	"\n"
 	"Options for use with the \"-o\" flag:\n"
-	"\tasync / sync:\tWrites are asynchronous / synchronous.\n"
-	"\tdev / nodev:\tAllow use of special device files / disallow them.\n"
-	"\texec / noexec:\tAllow use of executable files / disallow them.\n"
+	"\tasync/sync:\tWrites are asynchronous / synchronous.\n"
+	"\tatime/noatime:\tEnable / disable updates to inode access times.\n"
+	"\tdev/nodev:\tAllow use of special device files / disallow them.\n"
+	"\texec/noexec:\tAllow use of executable files / disallow them.\n"
 #if defined BB_FEATURE_MOUNT_LOOP
-	"\tloop: Mounts a file via loop device.\n"
+	"\tloop:\t\tMounts a file via loop device.\n"
 #endif
-	"\tsuid / nosuid:\tAllow set-user-id-root programs / disallow them.\n"
-	"\tremount: Re-mount a currently-mounted filesystem, changing its flags.\n"
-	"\tro / rw: Mount for read-only / read-write.\n"
+	"\tsuid/nosuid:\tAllow set-user-id-root programs / disallow them.\n"
+	"\tremount:\tRe-mount a currently-mounted filesystem, changing its flags.\n"
+	"\tro/rw:\t\tMount for read-only / read-write.\n"
 	"There are EVEN MORE flags that are specific to each filesystem.\n"
 	"You'll have to see the written documentation for those.\n";
 
@@ -98,10 +100,14 @@ struct mount_options {
 
 static const struct mount_options mount_options[] = {
 	{"async", ~MS_SYNCHRONOUS, 0},
+	{"atime", ~0, ~MS_NOATIME},
 	{"defaults", ~0, 0},
 	{"dev", ~MS_NODEV, 0},
+	{"diratime", ~0, ~MS_NODIRATIME},
 	{"exec", ~MS_NOEXEC, 0},
+	{"noatime", ~0, MS_NOATIME},
 	{"nodev", ~0, MS_NODEV},
+	{"nodiratime", ~0, MS_NODIRATIME},
 	{"noexec", ~0, MS_NOEXEC},
 	{"nosuid", ~0, MS_NOSUID},
 	{"remount", ~0, MS_REMOUNT},
diff --git a/util-linux/umount.c b/util-linux/umount.c
index ad7de2d20..18a5afe80 100644
--- a/util-linux/umount.c
+++ b/util-linux/umount.c
@@ -38,8 +38,11 @@ static const char umount_usage[] =
 	"\n"
 #endif
 	"\t-r:\tTry to remount devices as read-only if mount is busy\n"
+#if defined BB_FEATURE_MOUNT_FORCE
+	"\t-f:\tForce filesystem umount (i.e. unreachable NFS server)\n"
+#endif
 #if defined BB_FEATURE_MOUNT_LOOP
-	"\t-f:\tDo not free loop device (if a loop device has been used)\n"
+	"\t-l:\tDo not free loop device (if a loop device has been used)\n"
 #endif
 ;
 
@@ -53,6 +56,9 @@ static struct _mtab_entry_t *mtab_cache = NULL;
 
 
 
+#if defined BB_FEATURE_MOUNT_FORCE
+static int doForce = FALSE;
+#endif
 #if defined BB_FEATURE_MOUNT_LOOP
 static int freeLoop = TRUE;
 #endif
@@ -176,13 +182,20 @@ static int do_umount(const char *name, int useMtab)
 		/* this was a loop device, delete it */
 		del_loop(blockDevice);
 #endif
+#if defined BB_FEATURE_MOUNT_FORCE
+	if (status != 0 && doForce == TRUE) {
+		status = umount2(blockDevice, MNT_FORCE);
+		if (status != 0) {
+			fatalError("umount: forced umount of %s failed!\n", blockDevice);
+		}
+	}
+#endif
 	if (status != 0 && doRemount == TRUE && errno == EBUSY) {
 		status = mount(blockDevice, name, NULL,
 					   MS_MGC_VAL | MS_REMOUNT | MS_RDONLY, NULL);
 		if (status == 0) {
 			fprintf(stderr, "umount: %s busy - remounted read-only\n",
 					blockDevice);
-			/* TODO: update mtab if BB_MTAB is defined */
 		} else {
 			fprintf(stderr, "umount: Cannot remount %s read-only\n",
 					blockDevice);
@@ -240,7 +253,7 @@ extern int umount_main(int argc, char **argv)
 				umountAll = TRUE;
 				break;
 #if defined BB_FEATURE_MOUNT_LOOP
-			case 'f':
+			case 'l':
 				freeLoop = FALSE;
 				break;
 #endif
@@ -249,6 +262,11 @@ extern int umount_main(int argc, char **argv)
 				useMtab = FALSE;
 				break;
 #endif
+#ifdef BB_FEATURE_MOUNT_FORCE
+			case 'f':
+				doForce = TRUE;
+				break;
+#endif
 			case 'r':
 				doRemount = TRUE;
 				break;