scripts/gen_initramfs_list.sh: teach INITRAMFS_ROOT_UID and INITRAMFS…

…_ROOT_GID that -1 means "current user".

Teach INITRAMFS_ROOT_UID and INITRAMFS_ROOT_GID that -1 means "current user".

Link: http://lkml.kernel.org/r/2df3a9fb-4378-fa16-679d-99e788926c05@landley.net
Signed-off-by: Rob Landley <rob@landley.net>
Cc: Michal Marek <mmarek@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

scripts/gen_initramfs_list.sh

@@ -271,10 +271,12 @@ while [ $# -gt 0 ]; do
 	case "$arg" in
 		"-u")	# map $1 to uid=0 (root)
 			root_uid="$1"
+			[ "$root_uid" = "-1" ] && root_uid=$(id -u || echo 0)
 			shift
 			;;
 		"-g")	# map $1 to gid=0 (root)
 			root_gid="$1"
+			[ "$root_gid" = "-1" ] && root_gid=$(id -g || echo 0)
 			shift
 			;;
 		"-d")	# display default initramfs list

usr/Kconfig

@@ -36,10 +36,8 @@ config INITRAMFS_ROOT_UID
 	depends on INITRAMFS_SOURCE!=""
 	default "0"
 	help
-	  This setting is only meaningful if the INITRAMFS_SOURCE is
-	  contains a directory.  Setting this user ID (UID) to something
-	  other than "0" will cause all files owned by that UID to be
-	  owned by user root in the initial ramdisk image.
+	  If INITRAMFS_SOURCE points to a directory, files owned by this UID
+	  (-1 = current user) will be owned by root in the resulting image.
 
 	  If you are not sure, leave it set to "0".
 
@@ -48,10 +46,8 @@ config INITRAMFS_ROOT_GID
 	depends on INITRAMFS_SOURCE!=""
 	default "0"
 	help
-	  This setting is only meaningful if the INITRAMFS_SOURCE is
-	  contains a directory.  Setting this group ID (GID) to something
-	  other than "0" will cause all files owned by that GID to be
-	  owned by group root in the initial ramdisk image.
+	  If INITRAMFS_SOURCE points to a directory, files owned by this GID
+	  (-1 = current group) will be owned by root in the resulting image.
 
 	  If you are not sure, leave it set to "0".