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Re: control timeout of exec {fd}</dev/tcp/google.com/8242
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From: |
Kerin Millar |
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Subject: |
Re: control timeout of exec {fd}</dev/tcp/google.com/8242 |
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Date: |
Thu, 16 May 2024 05:54:45 +0100 |
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User-agent: |
Cyrus-JMAP/3.11.0-alpha0-456-gcd147058c-fm-hotfix-20240509.001-g0aad06e4 |
On Thu, 16 May 2024, at 3:35 AM, Peng Yu wrote:
> Hi,
>
> When a host is on, but a port is not on, exec commands like the
> following will take some time before it returns. How can I control the
> timeout so that it returns earlier if the port is nonresponsive?
> Thanks.
>
> $ time exec {fd}</dev/tcp/google.com/8242
> -bash: connect: Operation timed out
> -bash: /dev/tcp/google.com/8242: Operation timed out
>
> real 1m15.055s
> user 0m0.001s
> sys 0m0.004s
Your options are as follows.
- use a more capable external utility to set up and interact with sockets
- use a more powerful programming language
- compile and use a modified bash shell
--
Kerin Millar