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| -rw-r--r-- | doc/bash-style.cli | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/doc/bash-style.cli b/doc/bash-style.cli index f81479b..9e90e8a 100644 --- a/doc/bash-style.cli +++ b/doc/bash-style.cli @@ -224,6 +224,19 @@ along these lines: rm -f \"$dir/$name\".* \ +\N|One exception to this quoting rule is arithmetic expansion (\c{$((\ ))}): +Bash treats it as if it was double-quoted and, as a result, any inner quoting +is treated literally. For example: + +\ +z=$(($x + $y)) # Ok. +z=$((\"$x\" + \"$y\")) # Error. +z=$(($x + $(echo \"$y\"))) # Ok. +\ + +| + + If you have multiple values (e.g., program arguments) that may contain spaces, don't try to handle them with quoting and use arrays instead. Here is a typical example of a space-aware argument handling: |