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From: Stephane Chazelas <stephane@chazelas.org>
To: Peter Stephenson <p.w.stephenson@ntlworld.com>
Cc: Pier Paolo Grassi <pierpaolog@gmail.com>,
	Zsh-Users List <zsh-users@zsh.org>
Subject: Re: read string containing null
Date: Fri, 22 Oct 2021 10:05:18 +0100	[thread overview]
Message-ID: <20211022090518.ubd6ifyiyn65ap4z@chazelas.org> (raw)
In-Reply-To: <899710302.733700.1634821721465@mail2.virginmedia.com>

2021-10-21 14:08:41 +0100, Peter Stephenson:
[...]
> If you're not trying to read a line, don't use read.  If you "zmodload zsh/system"
> there's a sysread command which is more useful for lower level operations.
[...]

Yes, though sysread does only one read() of a fixed size (8KiB
be default), so you'd need to call it in a loop.

Other options are:

cmd | LC_ALL=C read -u0 -k999999999 var

Though it allocates as much memory.

And there's:

var=$(cmd; print .); var=${var%.}

To get the contents of a regular file into a variable, there's also

zmodload zsh/mapfile
var=$mapfile[path/to/file]

-- 
Stephane


  parent reply	other threads:[~2021-10-22  9:06 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-21 12:35 Pier Paolo Grassi
2021-10-21 13:08 ` Peter Stephenson
2021-10-21 13:30   ` Pier Paolo Grassi
2021-10-22  9:05   ` Stephane Chazelas [this message]
2021-10-23  0:04     ` Bart Schaefer

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