Question

I have a string made up of directories with a space after each one

dirs="/home /home/a /home/b /home/a/b/c"

the following code deletes the last directory in the string.

dirs=${dirs% * }

This works in all cases except when only one directory is in the string, then it doesn’t delete it because it doesn’t have a space before it.
I’m sure there’s an easy way to fix this, but i’m stuck.
I’d prefer a one line method without if statements if possible.

thanks

Answer 1

$ dirs="/home /home/a /home/b /home/a/b/c"
$ dirsa=($dirs)
$ echo "${dirsa[@]::$((${#dirsa[@]}-1))}"
/home /home/a /home/b
$ dirs="${dirsa[@]::$((${#dirsa[@]}-1))}"
$ echo "$dirs"
/home /home/a /home/b
$ dirs="/home"
$ dirsa=($dirs)
$ dirs="${dirsa[@]::$((${#dirsa[@]}-1))}"
$ echo "$dirs"

Or, you know, just keep it as an array the whole time.

$ dirs=(/home /home/a /home/b /home/a/b/c)
$ dirs=("${dirs[@]::$((${#dirs[@]}-1))}")
$ echo "${dirs[@]}"
/home /home/a /home/b