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9
votes
2answers
243 views

How a piped shell programs balance their output/input rates? [duplicate]

Possible Duplicate: Bash while loop and reading from pipe I come from web programming background, and find myself interested in one peculiarity of using a local shell. I understand that ...
2
votes
3answers
461 views

How to make wc interpret standard in as a file list

I know that there are other ways to go about this, but I'm looking to be able to make wc interpret stdin as a file name or list of file names. For example, ls JP*/std* | wc would work the same as ...
3
votes
2answers
400 views

Piped input to nano

Why does ls | nano - open the editor in Ubuntu but close the editor and save a file to -.save in CentOS? How can I get nano in CentOS to remain open when reading stdin?
5
votes
3answers
537 views

Construct a command by putting a string into a tty

I managed to do this echo -n "command" > /dev/tty1 The letters appear, and the cursor moves, but they are "ghosts" - if you hit enter, nothing happens (they are not in stdin). Edit: In the ...
7
votes
3answers
2k views

How do I make python programs behave like proper unix tools?

I have a few Python scripts laying around, and I'm working on rewriting them. I have the same problem with all of them. It's not obvious to me how to write the programs so that they behave like ...
5
votes
1answer
671 views

How to pipe text for a Mutt email body, then edit the email interactively?

I've been trying to figure out how to start Mutt in such a way that it's just like starting up an interactive Mutt and creating a new email, then copying the output of git request-pull into the body ...
5
votes
2answers
1k views

linux stdbuf - line-buffered stdin option does not exist

The man page for the stdbuf command states that line-buffered mode is invalid as a standard input buffering option. What is the reason for this? tail -f access.log | stdbuf -iL cut -d' ' -f1 | uniq ...
2
votes
5answers
667 views

Where are command line arguments (e.g. 'some.text') actually passed to?

From what I know, parameters you pass to a command, goes to it's STDIN stream. so this: cut -d. -f2 'some.text' should be perfectly identical to this: echo 'some.text' | cut -d. -f2 as we send ...
23
votes
4answers
4k views

How to do nothing forever in an elegant way?

I have a program which produces useful information on stdout but also reads from stdin. I want to redirect its standard output to a file without providing anything on standard input. So far, so good: ...
8
votes
4answers
3k views

“openssl dgst -sha1” producing an extraneous “(stdin)= ” prefix and trailing newline

If you run this command on your Unix echo -n "foo" | openssl dgst -sha1 You will get this output: (stdin)= 0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33 (followed by a newline). How can I force ...
4
votes
1answer
478 views

In a script, check if standard input comes from a file or pipe

I know this has been poorly covered previously, but those answers either lack explanation or don't apply. Basically at some point my scripts needs check if a file is specified, if it was it will be ...
4
votes
2answers
735 views

Can I read and write to the same file in Linux without overwriting it? [duplicate]

Possible Duplicate: How can I make iconv replace the input file with the converted output? I frequently connect to amazon ec2 using their public DNS names ...
3
votes
1answer
169 views

How can I pipe a path to pushd?

This seems like it should be easy enough to do, but I'm clearly not understanding something fundamental about piping output back and forth. I'm trying to do something like this: bundle show ...
28
votes
4answers
7k views

Can I pipe stdout on one server to stdin on another server?

stdout on one CentOS server needs to be piped to stdin on another CentOS server. Is this possible? Update ScottPack, MikeyB and jofel all have valid answers. I awarded the answer to Scott because, ...
6
votes
2answers
3k views

what is meant by connecting STDOUT and STDIN?

This is a newbie question. I'm reading a book, it says: Every process has at least three communication channels available to it: “standard input” (STDIN), “standard output” (STDOUT), and ...
1
vote
4answers
318 views

How to make Firefox 9 read stdin?

An earlier question got several nice answers involving stdin, none of which work in Firefox 9.0.1 (Edit: because I didn't read that you had to start a new Firefox process to make them work (thanks ...