Patch from Vladimir:

    1) fixed a bug that could crash df, mount, and umount applets if the root
    device name was longer then the word "root" (/dev/loop1 vs /dev/root) -
    2) severl functions needed static declaration in the umount applet
    3) update declaration for function in last_char_is() in libbb

2 files changed, 21 insertions, 18 deletions

diff --git a/util-linux/mount.c b/util-linux/mount.c
index 0295fabc6..4e0e3e428 100644
--- a/util-linux/mount.c
+++ b/util-linux/mount.c
@@ -319,10 +319,14 @@ void show_mounts()
                 while ((m = getmntent(mountTable)) != 0) {
                         char *blockDevice = m->mnt_fsname;
                         if (strcmp(blockDevice, "/dev/root") == 0) {
-                                find_real_root_device_name( blockDevice);
+                                blockDevice = find_real_root_device_name(blockDevice);
                         }
                         printf("%s on %s type %s (%s)\n", blockDevice, m->mnt_dir,
                                    m->mnt_type, m->mnt_opts);
+#ifdef BB_FEATURE_CLEAN_UP
+                        if(blockDevice != m->mnt_fsname)
+                                free(blockDevice);
+#endif
                 }
                 endmntent(mountTable);
         } else {
diff --git a/util-linux/umount.c b/util-linux/umount.c
index 0eade5a36..8565744f2 100644
--- a/util-linux/umount.c
+++ b/util-linux/umount.c
@@ -74,7 +74,7 @@ extern const char mtab_file[];	/* Defined in utility.c */
  * TODO: Perhaps switch to using Glibc's getmntent_r
  *        -Erik
  */
-void mtab_read(void)
+static void mtab_read(void)
 {
         struct _mtab_entry_t *entry = NULL;
         struct mntent *e;
@@ -97,7 +97,7 @@ void mtab_read(void)
         endmntent(fp);
 }
 
-char *mtab_getinfo(const char *match, const char which)
+static char *mtab_getinfo(const char *match, const char which)
 {
         struct _mtab_entry_t *cur = mtab_cache;
 
@@ -111,8 +111,7 @@ char *mtab_getinfo(const char *match, const char which)
                                 if (strcmp(cur->device, "/dev/root") == 0) {
                                         /* Adjusts device to be the real root device,
                                          * or leaves device alone if it can't find it */
-                                        find_real_root_device_name( cur->device);
-                                        return ( cur->device);
+                                        cur->device = find_real_root_device_name(cur->device);
                                 }
 #endif
                                 return cur->device;
@@ -123,18 +122,7 @@ char *mtab_getinfo(const char *match, const char which)
         return NULL;
 }
 
-char *mtab_first(void **iter)
-{
-        struct _mtab_entry_t *mtab_iter;
-
-        if (!iter)
-                return NULL;
-        mtab_iter = mtab_cache;
-        *iter = (void *) mtab_iter;
-        return mtab_next(iter);
-}
-
-char *mtab_next(void **iter)
+static char *mtab_next(void **iter)
 {
         char *mp;
 
@@ -145,10 +133,21 @@ char *mtab_next(void **iter)
         return mp;
 }
 
+static char *mtab_first(void **iter)
+{
+        struct _mtab_entry_t *mtab_iter;
+
+        if (!iter)
+                return NULL;
+        mtab_iter = mtab_cache;
+        *iter = (void *) mtab_iter;
+        return mtab_next(iter);
+}
+
 /* Don't bother to clean up, since exit() does that 
  * automagically, so we can save a few bytes */
 #ifdef BB_FEATURE_CLEAN_UP
-void mtab_free(void)
+static void mtab_free(void)
 {
         struct _mtab_entry_t *this, *next;