From 02c30875695f0530b42ca497138f9c3f1043c090 Mon Sep 17 00:00:00 2001
From: Jan Vitturi <vitturi.jan@gmail.com>
Date: Fri, 20 Sep 2019 18:50:16 +0200
Subject: [PATCH] Check for unexpanded globs

---
 README.md | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 263ff18..979af66 100644
--- a/README.md
+++ b/README.md
@@ -577,21 +577,24 @@ done < "file"
 
 Don’t use `ls`.
 
-**CAVEAT:** When the glob does not match anything (empty directory or no matching files) the variable will contain the unexpanded glob.
+**CAVEAT:** When the glob does not match anything (empty directory or no matching files) the variable will contain the unexpanded glob. To avoid working on unexpanded globs check the existence of the file contained in the variable using the appropriate [file conditional](#file-conditionals). Be aware that symbolic links are resolved.
 
 ```shell
 # Greedy example.
 for file in *; do
+    [ -e "$file" ] || [ -L "$file" ] || continue
     printf '%s\n' "$file"
 done
 
 # PNG files in dir.
 for file in ~/Pictures/*.png; do
+    [ -f "$file" ] || continue
     printf '%s\n' "$file"
 done
 
 # Iterate over directories.
 for dir in ~/Downloads/*/; do
+    [ -d "$dir" ] || continue
     printf '%s\n' "$dir"
 done
 ```