stdout

问题 The question is pretty simple, yet I can't seem to find how to do it: how do I write to StdOut in Windows/FASM? There does not seem to be any documentation online. Ideas? 回答1: There are a few options... 1) Use the WinAPI. This is either WriteConsole OR by using CreateFile with the filename as CON and then using WriteFile 2) Using msvcrt, and printf as you would in a c program. 来源： https://stackoverflow.com/questions/7263097/how-to-write-to-stdout-in-windows-and-fasm

问题 For example I need to set two tee commands in such way that one will be reading from STDOUT and second from STDERR and both redirecting the console output to different files. Is such thing possible in windows batch files ? I know about how to redirect output to file but in this case it won't be displayed on screen or how to combine both streams but how about piping both independently ? 回答1: You may process STDOUT and STDERR with separate programs via the next trick: (test | findstr /N /A:2A "

问题 This question already has an answer here : awk not printing to file (1 answer) Closed 12 months ago . I have a rather simple script (print content from a tty after adding timestamp to every row). It outputs nicely on the command line, but redirecting the output with > does not work. Why not? Here is the script: #!/bin/bash awk '{ print strftime("%Y-%m-%d %H:%M:%S |"), $0; }' "$1" Running it as is, like timecat /dev/ttyACM0 works fine, I see the content in my terminal. But if I run timecat

问题 (maybe it is the "tcpflow" problem) I write a script to monitoring http traffic, and I install tcpflow , then grep it works (and you should make a http request, for example curl www.163.com ) sudo tcpflow -p -c -i eth0 port 80 2>/dev/null | grep '^Host: ' it outputs like this (continuously) Host: config.getsync.com Host: i.stack.imgur.com Host: www.gravatar.com Host: www.gravatar.com but I can't continue to use pipe does not work (nothing output) sudo tcpflow -p -c -i eth0 port 80 2>/dev/null

问题 (maybe it is the "tcpflow" problem) I write a script to monitoring http traffic, and I install tcpflow , then grep it works (and you should make a http request, for example curl www.163.com ) sudo tcpflow -p -c -i eth0 port 80 2>/dev/null | grep '^Host: ' it outputs like this (continuously) Host: config.getsync.com Host: i.stack.imgur.com Host: www.gravatar.com Host: www.gravatar.com but I can't continue to use pipe does not work (nothing output) sudo tcpflow -p -c -i eth0 port 80 2>/dev/null

问题 I am using SLURM to dispatch jobs on a supercomputer. I have set the --output=log.out option to place the content from a job's stdout into a file ( log.out ). I'm finding that the file is updated every 30-60 minutes, making it difficult for me to check on the status of my jobs. Any idea why it takes so long to update this file? Is there a way to change settings so that this file is updated more frequently? Using SLURM 14.03.4-2 回答1: This may be related to buffering. Have you tried disabling

问题 I am using pty to read non blocking the stdout of a process like this: import os import pty import subprocess master, slave = pty.openpty() p = subprocess.Popen(cmd, stdout = slave) stdout = os.fdopen(master) while True: if p.poll() != None: break print stdout.readline() stdout.close() Everything works fine except that the while-loop occasionally blocks. This is due to the fact that the line print stdout.readline() is waiting for something to be read from stdout . But if the program already

问题 I am using pty to read non blocking the stdout of a process like this: import os import pty import subprocess master, slave = pty.openpty() p = subprocess.Popen(cmd, stdout = slave) stdout = os.fdopen(master) while True: if p.poll() != None: break print stdout.readline() stdout.close() Everything works fine except that the while-loop occasionally blocks. This is due to the fact that the line print stdout.readline() is waiting for something to be read from stdout . But if the program already

问题 First, I wrote a c++ code as follows: #include <cstdio> int main() { int a,b; while(scanf("%d %d",&a,&b) == 2) printf("%d\n",a+b); return 0; } I use g++ -o a a.cpp to complie it. Afterwards, I wrote python code as follows: import os,sys sys.stdin = open("./data.in","r") sys.stdout = open("./data.out","w") pid = os.fork() if pid == 0: cmd = ["./a","./a"] os.execv(cmd[0],cmd) However, the data.out file contains nothing. That is to say, the child process did not inherit stdin and stdout from his

问题 I have a Perl script which forks and daemonizes itself. It's run by cron, so in order to not leave a zombie around, I shut down STDIN,STDOUT, and STDERR: open STDIN, '/dev/null' or die "Can't read /dev/null: $!"; open STDOUT, '>>/dev/null' or die "Can't write to /dev/null: $!"; open STDERR, '>>/dev/null' or die "Can't write to /dev/null: $!"; if (!fork()) { do_some_fork_stuff(); } The question I have is: I'd like to restore at least STDOUT after this point (it would be nice to restore the