Questions tagged [mkfifo]

Question 1

Let's say I use Apache, and that I am in /var/www/html/. I do: mkfifo test.tar tar cvf - ~/test/* > test.tar & In a browser, when trying to download http://localhost/test.tar I get: ...

Question 2

I have 2 applications that pipe their data: application1 | application2 Basically, application1 generates a log with events that application2 processes. The issue is that I frequently update ...

Question 3

Hi I am trying to use a Unix FIFO to communicate between a Python script and a shell script. The intention is for the shell script to capture all output of the python script. So far I have the ...

Question 4

I try to create a named pipe, however, when I store data in it, it is still empty. $ mkfifo myfifo $ cat > myfifo 123 123 123 ^[[D ^C $ ls > myfifo ^C $ cat < myfifo (no output)

Question 5

When I increase fs.pipe-max-size like so: echo "fs.pipe-max-size = N" >> /etc/sysctl.conf sysctl -p (N is ~4-10Mbytes) And use F_SETPIPE_SZ to change named pipe sizes to N, sometimes ...

Question 6

I have this exact code: #!/bin/bash gtimeout(){ if type -f gtimeout &> /dev/null; then command gtimeout "$@" else timeout "$@" fi } export -f gtimeout; ...

Question 7

I have a terraform file: terraform { required_version = "1.3.5" } locals { a = "foo" b = "bar" } in a bash terminal, I can do: $ echo "local.a" | ...

Question 8

I am currently working on creating a bash script that is supposed to process large log files from one of my programs. When I first started the script took around 15 seconds to complete which wasn't ...

Question 9

tl;dr $ sudo -u www-data mplayer -slave -input file=/srv/mplayer.fifo -playlist /srv/list & $ lsof /srv/mplayer.fifo | tail +2 mplayer 21059 www-data 4u FIFO 179,2 0t0 2359331 /srv/...

Question 10

I've been greatly inspired by this question: Parallelize a Bash FOR Loop to parallelise some tools I've written that involve very loooong while read loops (ie doing the same task / set of tasks ...

Question 11

Suppose that, at time (1), I create a named pipe using Python with the goal that eventually this Python process would write something to that named pipe. Why? Because, at time (2), there is another ...

Question 12

Take the following Bash script 3-output-writer.sh: echo A >&1 echo B >&2 echo C >&3 Of course when ran as . 3-output-writer.sh it gets the error 3: Bad file descriptor, because ...

Question 13

I have a c program on a Cyclone 5 that does an FFT using the connected FPGA. This program currently takes 256 bytes from stdin and then process it gives the FFT results on stdout. I run it like this ...

Question 14

I am trying to redirect stdout of a command into two "branches" using tee for separate processing. Finally I need to merge results of both "branches" using paste. I came up with the following code for ...

Question 15

I have this test script: #!/usr/bin/env bash fif="foooz"; rm "$fif" ; mkfifo "$fif" ( cat "$fif" | cat && echo "1") & sleep 0.1 ( cat "$fif" | cat && echo "2") & sleep 0....

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Questions tagged [mkfifo]

Serving a file (e.g. in Apache) from a named pipe (made with mkfifo)

Can I use named pipes to achieve temporal uncoupling?

FIFO capture using cat not working as intended?

Empty named pipe

Setting large fs.pipe-max-size

Strange incongruent output for both nc and fifo

Unable to redirect stdout for background terraform process after it received input from named pipe

Speed up grep usage inside bash script

Process (mplayer) doesn't read from named pipe when started from webserver (lighttpd)

Adding 'Progress bar / counter' to a parallelised For Loop

How to guarantee that that only a specific process reads from a named pipe?

How to pipe all output streams to another process?

Process in Pipe which Processes 256 bytes at a Time

Using tee and paste results in a deadlock

Why don't named pipes respect the order at which readers were attached?

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