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From: Harald van Dijk <harald@gigawatt.nl>
To: Subhaditya Nath <sn03.general@gmail.com>, dash@vger.kernel.org
Subject: Re: ANSI escape codes in printf don't work
Date: Mon, 7 Feb 2022 15:55:03 +0000	[thread overview]
Message-ID: <d89a498d-f0c7-99c5-c6e5-901734abdc42@gigawatt.nl> (raw)
In-Reply-To: <CAPHxB8tN-aCb1vUTPPWqakyA5wVJfzXXQrr97fPE00fTQPuwkg@mail.gmail.com>

Hi,

On 07/02/2022 15:36, Subhaditya Nath wrote:
> Run this -
> 
>      /usr/bin/printf '\x1b[31m%s\x1b[m\n' FAIL
> 
> It should print FAIL in red foreground color.
> It does, on other shells.
> In dash, it doesn't.

Hexadecimal escape sequences are not specified by POSIX. They are a 
common extension in other shells as you noticed but dash generally 
limits itself to what POSIX specifies. Octal escape sequences are part 
of the standard and supported by dash, and offer the same functionality:

   printf '\033[31m%s\033[m\n' FAIL

Cheers,
Harald van Dijk

      reply	other threads:[~2022-02-07 16:05 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-07 15:36 ANSI escape codes in printf don't work Subhaditya Nath
2022-02-07 15:55 ` Harald van Dijk [this message]

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