linux-kernel - [PATCH 03/20] kbuild: scripts/install.sh: provide a "install" function

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Date:   Wed,  7 Apr 2021 07:34:02 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>
Cc:     linux-kbuild@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 03/20] kbuild: scripts/install.sh: provide a "install" function

Instead of open-coding the "test for file, if present make a backup,
then copy the file to the new location" in multiple places, make a
single function, install(), to do all of this in one place.

Note, this does change the default x86 kernel map file saved name from
"System.old" to "System.map.old".  This brings it into unification with
the other architectures as to what they call their backup file for the
kernel map file.  As this is a text file, and nothing parses this from a
backup file, there should not be any operational differences.

Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 scripts/install.sh | 26 +++++++++++++++-----------
 1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/scripts/install.sh b/scripts/install.sh
index c183d6ddd00c..af36c0a82f01 100644
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -27,6 +27,19 @@ verify () {
  	fi
 }
 
+install () {
+	install_source=${1}
+	install_target=${2}
+
+	echo "installing '${install_source}' to '${install_target}'"
+
+	# if the target is already present, move it to a .old filename
+	if [ -f "${install_target}" ]; then
+		mv "${install_target}" "${install_target}".old
+	fi
+	cat "${install_source}" > "${install_target}"
+}
+
 # Make sure the files actually exist
 verify "$2"
 verify "$3"
@@ -37,17 +50,8 @@ if [ -x ~/bin/"${INSTALLKERNEL}" ]; then exec ~/bin/"${INSTALLKERNEL}" "$@"; fi
 if [ -x /sbin/"${INSTALLKERNEL}" ]; then exec /sbin/"${INSTALLKERNEL}" "$@"; fi
 
 # Default install - same as make zlilo
-
-if [ -f "$4"/vmlinuz ]; then
-	mv "$4"/vmlinuz "$4"/vmlinuz.old
-fi
-
-if [ -f "$4"/System.map ]; then
-	mv "$4"/System.map "$4"/System.old
-fi
-
-cat "$2" > "$4"/vmlinuz
-cp "$3" "$4"/System.map
+install "$2" "$4"/vmlinuz
+install "$3" "$4"/System.map
 
 if [ -x /sbin/lilo ]; then
        /sbin/lilo
-- 
2.31.1