Path: csiph.com!usenet.pasdenom.info!news.franciliens.net!fdn.fr!usenet-fr.net!nerim.net!novso.com!newsfeed.xs4all.nl!newsfeed2.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.004 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'configure': 0.05; 'output': 0.05; 'subject:file': 0.07; '(aka': 0.09; 'cc:addr :python-list': 0.11; 'python': 0.11; 'suggest': 0.14; 'different,': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'programmatic': 0.16; 'stderr': 0.16; 'stdout': 0.16; 'appropriate': 0.16; 'wrote:': 0.18; 'wed,': 0.18; 'trying': 0.19; 'coding': 0.22; 'cc:addr:python.org': 0.22; 'error': 0.23; 'subject:problem': 0.24; 'file.': 0.24; 'cc:2**0': 0.24; 'header :In-Reply-To:1': 0.27; 'am,': 0.29; 'dec': 0.30; 'robert': 0.30; 'message-id:@mail.gmail.com': 0.30; "i'm": 0.30; 'code': 0.31; 'produces': 0.31; 'file': 0.32; 'probably': 0.32; 'run': 0.32; 'linux': 0.33; 'running': 0.33; 'entirely': 0.33; 'could': 0.34; 'problem': 0.35; 'something': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'machine.': 0.36; 'server': 0.38; 'files': 0.38; 'that,': 0.38; 'sure': 0.39; 'either': 0.39; 'signal': 0.60; 'simply': 0.61; "you're": 0.61; 'press': 0.70; 'subject:,': 0.80; 'subject:Solution': 0.84; 'to:none': 0.92 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:cc :content-type; bh=SvcaUyHMTp51vG1tSn817DroGa6f4Ftb3Q3punwJS9Y=; b=NvSXjVheCqecn+IcPwxAxN+WYwj2kEXk0Yl3suVVbYC/PLzAuYcCZhT9Da0/LrMf4k 1ZuaDWksEQ/Sbp320bkRjrbP3DvRYpuKVBBGng8ZBz7cCtE62V7z8Qf7eaLr4xulYFOz 9N/wtgrxOTOoF5F4TE9+X+B6qaLAWBpEogBUyHthafGMFAEjT30W7/R1tEv4m/YqSDDr B2B04q6lMt+m/O76Q6crgE7PBxbeu3bFkVi7b/s7mDu7jHIaDUigJp/BtULK8dh1mwTi vYS+2H7kh71ITn7mU9V+z6G7fFg+VlaU0qATtCb9PhArEgGaUOnIWtP3+ykrBa6uVkEY WlHA== MIME-Version: 1.0 X-Received: by 10.50.171.168 with SMTP id av8mr4138613igc.2.1418152903240; Tue, 09 Dec 2014 11:21:43 -0800 (PST) In-Reply-To: References: Date: Wed, 10 Dec 2014 06:21:43 +1100 Subject: Re: Solution to a problem,write terminal output to file From: Chris Angelico Cc: "python-list@python.org" Content-Type: text/plain; charset=UTF-8 X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 32 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1418152906 news.xs4all.nl 2923 [2001:888:2000:d::a6]:52246 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:82234 On Wed, Dec 10, 2014 at 4:11 AM, Robert Clove wrote: > I am facing a problem in python coding that is > > I have a client server program(programs a re in c code and client and server > are its executable) on Linux machine. > To run client i do this ./strace -c client and to run server i type this > ./strace -c server > > When i give ctrl+c to client i see some output on the terminal, i want that > output in the file i mean i want to send the ctrl+c signal programmatic ally > to client after a minute and write the output in the file. > > if i use subprocess.Popen to execute ./strace -c client and give ctrl+c > signal i don''t see any output on the terminal but if i see os.system to > execute ./strace -c client i see the output on terminal.Now i want to send > the ctrl+c signal to os.system and write the terminal output into a file. I'm not entirely sure what you're trying to do here, but strace produces its output on Standard Error (aka "stderr"). You can simply redirect that to a file. That's the normal strace program. You might be running something completely different, since you're running "./strace"; but I would suggest that it probably uses either stderr or stdout ("Standard Output"), and you could redirect either or both. Try this, at the terminal (no Python involved): ./strace -c client >client_out 2>client_err Then press Ctrl-C, and see which of the files has the output. Based on that, you could configure subprocess.Popen to send the appropriate stream to a file. ChrisA