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Re: implementation of <() (creating a temp fifo) ?
- X-seq: zsh-users 22461
- From: Timothee Cour <timothee.cour2@xxxxxxxxx>
- To: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>
- Subject: Re: implementation of <() (creating a temp fifo) ?
- Date: Sun, 12 Feb 2017 18:30:16 -0800
- Cc: Zsh Users <zsh-users@xxxxxxx>
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On Sun, Feb 12, 2017 at 10:17 AM, Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>
> On Feb 12, 4:32am, Timothee Cour wrote:
> } Could someone kindly point me source code showing how zsh implements <()
> } (temporary named pipe creation)? (ideally a url)
> } * my workaround is to use tempnam but docs says it's not recommended (
> } http://man7.org/linux/man-pages/man3/tempnam.3.html)
> There doesn't seem to be any better option for a temporary named pipe.
> mkfifo is relatively safe because there's no way to cause it to re-use
> an existing fifo, so as long as you're confident that the directory
> where the fifo is placed cannot itself be spoofed, using tempnam is OK.
> Note that the default build mode for zsh is to instead use /dev/fd/ or
> the equivalent to get a handle to the stdin or stdout of the process,
> and not use a named pipe at all.
> Also since any process can connect to a named pipe once it exists, be
> sure you're passing appropriately restrictive file modes to mkfifo.
> To answer your direct question:
> search for "namedpipe"
> search for "gettempname"
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