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Redirect stdout pipe of child process in Go
...rminal
window where I started the parent program.
No need to mess with pipes or goroutines, this one is easy.
func main() {
// Replace `ls` (and its arguments) with something more interesting
cmd := exec.Command("ls", "-l")
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.R...
Assign output of a program to a variable using a MS batch file
... This is a great trick, I wonder why it doesn't work with a pipe
– Bill K
Apr 10 '13 at 22:26
25
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How to get Linux console window width in Python
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tput is better than stty, as stty cannot work with PIPE.
– liuyang1
Jul 14 '15 at 12:35
5
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jQuery.ajax handling continue responses: “success:” vs “.done”?
...re (much cooler) things you can do with $.Deferred, one of which is to use pipe to trigger a failure on an error reported by the server, even when the $.ajax request itself succeeds. For example:
function xhr_get(url) {
return $.ajax({
url: url,
type: 'get',
dataType: 'json'
})
....
How to pipe input to a Bash while loop and preserve variables after loop ends
... do not themselves create a subshell. In this context, they are part of a pipeline and are therefore run as a subshell, but it is because of the |, not the { ... }. You mention this in the question. AFAIK, you can do a return from within these inside a function.
Bash also provides the shopt buil...
How does the vim “write with sudo” trick work?
...tee.
Understanding tee
As for tee, picture the tee command as a T-shaped pipe in a normal bash piping situation: it directs output to specified file(s) and also sends it to standard output, which can be captured by the next piped command.
For example, in ps -ax | tee processes.txt | grep 'foo', ...
Bash variable scope
...
The problem is that processes put together with a pipe are executed in subshells (and therefore have their own environment). Whatever happens within the while does not affect anything outside of the pipe.
Your specific example can be solved by rewriting the pipe to
while ....
Running Bash commands in Python
...bprocess
process = subprocess.Popen(bashCommand.split(), stdout=subprocess.PIPE)
output, error = process.communicate()
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String difference in Bash
...(echo "$string2")
Greg's Bash FAQ: Process Substitution
or with a named pipe
mkfifo ./p
diff - p <<< "$string1" & echo "$string2" > p
Greg's Bash FAQ: Working with Named Pipes
Named pipe is also known as a FIFO.
The - on its own is for standard input.
<<< is a "her...
How do I write stderr to a file while using “tee” with a pipe?
...ve you can retain exit status if you prepend the command chain with set -o pipefail followed by ; or && if I'm not mistaken.
– David
Nov 25 '15 at 21:24
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