Re: bash shell script: recently running, now failing

[Andrey Repin <anrdaemon@yandex.ru>]

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Greetings, Fergus Daly!

> I have a "hash bang" bash shell script i.e. first line
> #! /bin/sh
> or equivalently
> #! /bin/bash

By default, sh is bash in base Cygwin installation.

> Q3 - at 1/8 the size of bash and sh, I am not at all sure of the role and reach of dash.
> Should the edit (dash replacing bash/sh) be incorporated elsewhere or would this be a
> bad idea (and retained only locally in what is indeed an eccentric and one-off context)?

I'm replacing /bin/sh with dash as I've found that even in POSIX mode, bash
allows for a lot of bash'izms in scripts, which would not otherwise run under
(d?a)?sh.

See the post-install script attached.


-- 
With best regards,
Andrey Repin
Thursday, April 6, 2023 15:18:19

Sorry for my terrible english...

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#!/bin/dash

[ -f /bin/dash.exe ] || exit

_f="$(mktemp /bin/sh.prelink.XXXXXX)"

[ -L /bin/sh.exe ] || mv /bin/sh.exe "$_f"

ln -fsT /bin/dash.exe /bin/sh.exe
if [ $? -gt 0 ]; then
    echo "Got a problem creating link for /bin/sh !" >&2
    exit 1
else
    rm "$_f"
fi

exit 0