From f8de4e03e9263e39d03455845ec2fc51fd99c6c7 Mon Sep 17 00:00:00 2001
From: giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8>
Date: Thu, 4 Aug 2022 16:20:56 +0000
Subject: Validate size parameter is a number (to prevent shell injection
 problems)

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@4393 9d0c8265-081b-0410-96cb-a4ca84ce46f8
---
 editor/pnmmargin | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'editor/pnmmargin')

diff --git a/editor/pnmmargin b/editor/pnmmargin
index 6b30c074..cfc5256e 100755
--- a/editor/pnmmargin
+++ b/editor/pnmmargin
@@ -67,6 +67,13 @@ fi
 size="$1"
 shift
 
+case $size in
+    ''|*[!0-9]*)
+        echo "Size argument '$size' is not a whole number"
+        exit 1
+        ;;
+esac
+
 if [ ${2-""} ] ; then
     echo "usage: $0 [-white|-black|-color <colorspec>] <size> [pnmfile]" 1>&2
     exit 1
-- 
cgit 1.4.1