Style distinguishes excellence from accomplishment.
I am doing a startup!
Cross-browser testing from your browser!
I have written my fourth book!
Be faster than Larry Wall at command line!
You're viewing a comment by AltairIV and its responses.
It's a bit late, but to address Alan's behavior:
As always, the redirections are being set up in order from left to right, and the sub-processes are inheriting the file descriptors from the parent.
The first, stdout, redirection gets set to the anonymous pipe created by the process substitution (e.g. /dev/fd/60), as expected. And the sed command inside it uses that as its stdin (and its stdout/stderr go to the terminal).
But when the second, stderr, process substitution is set up, the sed command inside it inherits the redirected stdout of the parent. This means it's using 1>/dev/fd/60, and its output is getting redirected right back into the first sed!
So the secret is simply to reverse the file descriptors so that stderr is defined before stdout.
$ ls one.txt two.txt 2> >(sed "s/^/E /") > >(sed "s/^/O /")
E ls: cannot access two.txt: No such file or directory
Or alternately to re-redefine it, as raphael did.
(why do I need your e-mail?)
It would be nice if you left your e-mail address. Sometimes I want to send a private message, or just thank for the great comment. Having your e-mail really helps.
I will never ever spam you.
(Your twitter handle, if you have one.)
* use <pre>...</pre> to insert a plain code snippet.
* use <pre lang="lang">...</pre> to insert a syntax highlighted code snippet.
For example, <pre lang="python">...</pre> will insert Python highlighted code.
* use <code>...</code> to highlight a variable or a single shell command.
* use <a href="url" nospam>title</a> to insert links.
<a href="url" nospam>title</a>
* use other HTML tags, such as, <b>, <i>, <blockquote>, <sup>, <sub> for text formatting.
Type the word "unix_329": (just to make sure you're a human)
Please preview the comment before submitting to make sure it's OK.
Peter Krumins' blog about programming, hacking, software reuse, software ideas, computer security, browserling, google and technology.
Reach me at:
Or meet me on:
Subscribe through an RSS feed:
(what is rss?)
Subscribe through email:
Enter your email address:
Delivered by FeedBurner
I love to read science books. They make my day and I get ideas for awesome blog posts, such as Busy Beaver, On Functors, Recursive Regular Expressions and many others.
Take a look at my Amazon wish list, if you're curious about what I have planned reading next, and want to surprise me. :)
See all top articles
See all downloads
See more detailed list of recent articles
See more detailed category information
See more detailed list of all articles