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Re: utmac -muh error on Ubuntu

From: John Ankarström
Subject: Re: utmac -muh error on Ubuntu
Date: Sun, 4 Jul 2021 22:22:16 +0200
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.5.0

Den 2021-07-04 kl. 21:50 skrev Valtteri Vuorikoski:
>   sh: 1: Bad substitution
>   neatroff: failed to open </tmp/>
>   rm: cannot remove '/tmp/': No such file or directory
> This is caused by this line in uh.tmac:
>   .   sy str="\\$2" && echo ".ds head-str ${str: -1}" >  
> /tmp/\\*[data-file]

It seems Bash accepts ${str: -1}, while (most? many? some?)
implementations of sh don't.  I tried FreeBSD's /bin/sh and it failed
with a bad substitution error too.

The compatible syntax is ${str:-1}.

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