dash/ash [LWN.net]

dash/ash

Posted Oct 3, 2014 9:48 UTC (Fri) by Jandar (subscriber, #85683)
In reply to: dash/ash by nix
Parent article: Bash gets shellshocked

With arrays the construction of an argument-vector is easy.

typeset -a Options Files
Options+=("$option1")
Files+=("$file1")
$UseVerbose && Options+=("-v")
$UseSecondFile && Files+=("$file2")
command "${Options[@]}" -- "${Files[@]}"

How do you prepare (with correct quoting) a dynamic argument-vector without arrays? All other methods are ugly and error-prone beyond any acceptable limit.

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dash/ash

Posted Oct 17, 2014 11:12 UTC (Fri) by mgedmin (guest, #34497) [Link] (1 responses)

Thank you. I've been reading bash(1) and tearing my hair out, and the only syntax I discovered for appending an item to an array was

paths[${#paths[*]}]="$1"

Rewriting this to use +=() will make my scripts a bit saner.

dash/ash

Posted Oct 17, 2014 12:02 UTC (Fri) by mathstuf (subscriber, #69389) [Link]

Any reason path=( "$path[@]" "$1" ) wouldn't have worked?