1 files changed, 35 insertions, 0 deletions
diff --git a/jpegtran_rotate_lossless b/jpegtran_rotate_lossless
new file mode 100755
index 0000000..f876e10
--- /dev/null
+++ b/jpegtran_rotate_lossless
@@ -0,0 +1,35 @@
+#!/bin/sh
+
+function usage {
+    echo 'Usage: jpegtran-rotate-lossless.sh <90|180|270> <file>'
+    exit 1
+}
+
+ROTATION=$1
+FILE=$2
+
+if [ $# -ne 2 ]; then
+    usage
+fi
+
+case $ROTATION in
+    90|180|270)
+        true ;;
+    *)
+        usage ;;
+esac
+
+jpegtran -rotate $ROTATION -trim -copy all $FILE > $FILE-rotate
+if [ $? -ne 0 ]; then
+    echo 'jpegtran-rotate-lossless.sh: jpegtran failed'
+    exit 1
+fi
+
+mv $FILE-rotate $FILE
+if [ $? -ne 0 ]; then
+    'jpegtran-rotate-lossless.sh: mv failed'
+    exit 1
+fi
+
+exit 0
+