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Check for unexpanded globs

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Jan Vitturi 2019-09-20 18:50:16 +02:00
parent d6d7470683
commit 02c3087569
1 changed files with 4 additions and 1 deletions
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README.md
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@ -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
```