extlinux: add ext4 support to the installer

The filesystem code now supports ext4, so support it in the installer
as well.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/extlinux/main.c b/extlinux/main.c
index 476d006..79ead18 100644 (file)
--- a/extlinux/main.c
+++ b/extlinux/main.c
@@ -14,7 +14,7 @@
 /*
  * extlinux.c
  *
- * Install the extlinux boot block on an ext2/3 filesystem
+ * Install the extlinux boot block on an ext2/3/4 filesystem
  */
 
 #define  _GNU_SOURCE           /* Enable everything */
@@ -618,7 +618,7 @@ int install_bootblock(int fd, const char *device)
     }
 
     if (sb.s_magic != EXT2_SUPER_MAGIC) {
-       fprintf(stderr, "no ext2/ext3 superblock found on %s\n", device);
+       fprintf(stderr, "no ext2/3/4 superblock found on %s\n", device);
        return 1;
     }
 
@@ -766,7 +766,8 @@ static const char *find_device(const char *mtab_file, dev_t dev)
 
     while ((mnt = getmntent(mtab))) {
        if ((!strcmp(mnt->mnt_type, "ext2") ||
-            !strcmp(mnt->mnt_type, "ext3")) &&
+            !strcmp(mnt->mnt_type, "ext3") ||
+            !strcmp(mnt->mnt_type, "ext4")) &&
            !stat(mnt->mnt_fsname, &dst) && dst.st_rdev == dev) {
            devname = strdup(mnt->mnt_fsname);
            break;
@@ -796,7 +797,7 @@ int install_loader(const char *path, int update_only)
     }
 
     if (sfs.f_type != EXT2_SUPER_MAGIC) {
-       fprintf(stderr, "%s: not an ext2/ext3 filesystem: %s\n", program, path);
+       fprintf(stderr, "%s: not an ext2/3/4 filesystem: %s\n", program, path);
        return 1;
     }