Bsrgvty

Heavy condensation inside car during winter. Tried multiple things, but no results!

The lecturer supposed to grade my presentation fell asleep while I held it. Should I complain?

Draw a line in the center of a chessboard

I'm from Mumbai, India. I want to travel to Europe as a tourist but my salary is low ( €190/month)

A feasible and efficient method of fast global travel?

How to negotiate an offer if I'm not actually going to accept it

How do HK restaurants keep white scallops that they wok fry? No sear marks!

Why does Rome municipality seem to have a hard time maintaining the city?

Single word for being half in this world, half in some other spooky plane of existence

How to translate "cocotte en papier" in English?

Fewest Chess Pieces

Why does "Endgame​" have a different time travel theory?

Continuous functions taking uncountably many values countably often

What is QED about "Cavity QED"?

Is there a coup going on in Bolivia?

20 cards with no Set

In TDD, should I add unit tests to refactored code?

Does a small cup of coffee result in a 45% reduced blood flow to the brain?

Is 忍者/忍び also used for women?

How do shared hosting providers know you own a domain when you point the DNS to their server?

Why can "bubo" ("owl") be feminine or masculine?

What happens when a ceramic bypass or decoupling capacitor goes bad?

Why would a life-insurance company agree to a 20-year guaranteed life annuity which is expected to pay out more than the principal?

Expand a recursive pattern

Can't read process output with cat and tail

tail output of program`tail` and append in onelinerWriting to multiple files with catArrow keys with cat / readUbuntu Service with tail not startingGiving cat output to rm

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty
margin-bottom:0;

2

I have a simple example of writing to stdout:

import datetime
import time


if __name__ == '__main__':

 while True:
 print('time is '.format(datetime.datetime.now().time()))
 time.sleep(5)

Then I did:

python main.py & echo $!

to run my process and get its PID.

My purpose is reading from stdout of my current process above, but all of these commands just freeze console and don't show stdout content

sudo tail -f /proc/15608/fd/1my console
sudo cat /proc/15608/fd/1

Notice strace works perfectly:

sudo strace -e write=1 -e trace=write -p 15608

But it gives me too much useless text.

My question: why don't cat (and tail) work properly and freeze my console? Could somebody explain me why it happens?

command-line bash

share|improve this question

asked Aug 11 at 22:05

SergeySergey

1111 bronze badge

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This might answer some of your questions: Why can't I tail -f /proc/$pid/fd/1?
  
  – steeldriver
  Aug 12 at 1:36
  

  
  
  
  

add a comment
 | 

2

I have a simple example of writing to stdout:

import datetime
import time


if __name__ == '__main__':

 while True:
 print('time is '.format(datetime.datetime.now().time()))
 time.sleep(5)

Then I did:

python main.py & echo $!

to run my process and get its PID.

My purpose is reading from stdout of my current process above, but all of these commands just freeze console and don't show stdout content

sudo tail -f /proc/15608/fd/1my console
sudo cat /proc/15608/fd/1

Notice strace works perfectly:

sudo strace -e write=1 -e trace=write -p 15608

But it gives me too much useless text.

My question: why don't cat (and tail) work properly and freeze my console? Could somebody explain me why it happens?

command-line bash

share|improve this question

asked Aug 11 at 22:05

SergeySergey

1111 bronze badge

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This might answer some of your questions: Why can't I tail -f /proc/$pid/fd/1?
  
  – steeldriver
  Aug 12 at 1:36
  

  
  
  
  

add a comment
 | 

I have a simple example of writing to stdout:

import datetime
import time


if __name__ == '__main__':

 while True:
 print('time is '.format(datetime.datetime.now().time()))
 time.sleep(5)

Then I did:

python main.py & echo $!

to run my process and get its PID.

My purpose is reading from stdout of my current process above, but all of these commands just freeze console and don't show stdout content

sudo tail -f /proc/15608/fd/1my console
sudo cat /proc/15608/fd/1

Notice strace works perfectly:

sudo strace -e write=1 -e trace=write -p 15608

But it gives me too much useless text.

My question: why don't cat (and tail) work properly and freeze my console? Could somebody explain me why it happens?

command-line bash

share|improve this question

asked Aug 11 at 22:05

SergeySergey

1111 bronze badge

import datetime
import time


if __name__ == '__main__':

 while True:
 print('time is '.format(datetime.datetime.now().time()))
 time.sleep(5)

python main.py & echo $!

sudo tail -f /proc/15608/fd/1my console
sudo cat /proc/15608/fd/1

sudo strace -e write=1 -e trace=write -p 15608

share|improve this question

asked Aug 11 at 22:05

SergeySergey

1111 bronze badge

share|improve this question

asked Aug 11 at 22:05

SergeySergey

1111 bronze badge

asked Aug 11 at 22:05

SergeySergey

1111 bronze badge

asked Aug 11 at 22:05

SergeySergey

1111 bronze badge