Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!goblin1!goblin2!goblin.stu.neva.ru!newsfeed.xs4all.nl!newsfeed4a.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 0.005 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'causing': 0.04; 'output': 0.05; 'filename:fname piece:py': 0.07; 'arguments': 0.09; 'subject:module': 0.09; 'runs': 0.10; 'argument,': 0.16; 'module?': 0.16; 'subject:usage': 0.16; 'variations': 0.16; 'exception': 0.16; 'module': 0.19; 'options.': 0.19; 'passing': 0.19; 'command': 0.22; 'example': 0.22; 'cheers,': 0.24; '(see': 0.26; 'pass': 0.26; 'words': 0.29; 'message-id:@mail.gmail.com': 0.30; "i'm": 0.30; 'exceptions': 0.31; 'skip:# 10': 0.33; 'could': 0.34; 'something': 0.35; 'test': 0.35; 'received:google.com': 0.35; 'there': 0.35; 'hi,': 0.36; 'wrong': 0.37; 'so,': 0.37; 'expected': 0.38; 'to:addr:python-list': 0.38; 'does': 0.39; 'skip:. 10': 0.39; 'to:addr:python.org': 0.39; 'how': 0.40; 'logged': 0.60; 'simple': 0.61; 'content-type:application/octet- stream': 0.65; 'earl': 0.91 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=jSMG32GOC0WalAO1fvzgy6Sq6eo4Ej6ytwSUnaEKDV0=; b=rMW4MZFD8Mg/ddPqdBReKJUHYTtsI5hGCth3pUMNU17Z/VdHH7JFM8GHMkNLnEEGg6 B/ntsq4gcRaeM7/127/Tb9eUzvFPYvD6qg6HX8ALB41rTGLKrVsAIqEOdODlPfUCnLA1 cAN3WaPDKOFXtX0fpKU0pNzF0tU5mUUiZYYSic6aXiESbvr7bRHVC2CYd4e7TjgkEYxF IFIjB4Q7OAJ5HHWuUect0OESLa+ADM6t8ifxe8xG6S6qKWsqwfuC9xshEWXgJJSHU/g6 BxObu1YsyvzJdICBd3lRz52O/7+pSvBOJN2wygUnfOCuJmaJ08lqJ6HOdfmsv0/nc00w r7pw== MIME-Version: 1.0 X-Received: by 10.180.80.225 with SMTP id u1mr18281725wix.69.1409542125373; Sun, 31 Aug 2014 20:28:45 -0700 (PDT) Date: Mon, 1 Sep 2014 11:28:45 +0800 Subject: subprocess module usage From: Earl Lapus To: python-list@python.org Content-Type: multipart/mixed; boundary=f46d0442805eae002b0501f899e3 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: 69 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1409542522 news.xs4all.nl 2974 [2001:888:2000:d::a6]:48493 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:77387 --f46d0442805eae002b0501f899e3 Content-Type: text/plain; charset=UTF-8 Hi, I made simple test program using the subprocess module (see attached: exec_cmd.py). I ran it passing variations of 'ls' command options. I encounter exceptions every time I use '-l' options. Example runs where exception occurs: # ./exec_cmd.py ls -al # ./exec_cmd.py ls -l However, if I pass 'ls' and arguments as one argument, like so: #./exec_cmd.py 'ls -al' exception does not occur. I logged output (see ls_test.out). So, what could be causing this behavior? Is this expected or is there something wrong with how I'm using the subprocess module? Cheers, Earl -- There are seven words in this sentence. --f46d0442805eae002b0501f899e3 Content-Type: application/octet-stream; name="exec_cmd.py" Content-Disposition: attachment; filename="exec_cmd.py" Content-Transfer-Encoding: base64 X-Attachment-Id: f_hzj8yzpq0 IyEvdXNyL2Jpbi9lbnYgcHl0aG9uCgppbXBvcnQgc3lzCmltcG9ydCBzdWJwcm9jZXNzCgpkZWYg ZXhlY3V0ZV9jb21tYW5kKGNtZCk6CiAgICBwcmludCBjbWQJCiAgICB0cnk6CiAgICAgICAgb3V0 cHV0ID0gc3VicHJvY2Vzcy5jaGVja19vdXRwdXQoY21kLCBzaGVsbD0iVHJ1ZSIpCiAgICBleGNl cHQgc3VicHJvY2Vzcy5DYWxsZWRQcm9jZXNzRXJyb3IsIGV4OgogICAgICAgIHByaW50ICdFeGNl cHRpb246IHswfScuZm9ybWF0KHN0cihleCkpCiAgICBlbHNlOgogICAgICAgIHByaW50ICcqKioq KiBvdXRwdXQgc3RhcnQgKioqKionCiAgICAgICAgcHJpbnQgb3V0cHV0CiAgICAgICAgcHJpbnQg JyoqKioqIG91dHB1dCBlbmQgKioqKionCgpkZWYgbWFpbihhcmd2KToKICAgIGV4ZWN1dGVfY29t bWFuZChhcmd2WzE6XSkKICAgIHJldHVybiAwCgppZiBfX25hbWVfXyA9PSAnX19tYWluX18nOgog ICAgc3lzLmV4aXQobWFpbihzeXMuYXJndikpCg== --f46d0442805eae002b0501f899e3 Content-Type: application/octet-stream; name="ls-test.out" Content-Disposition: attachment; filename="ls-test.out" Content-Transfer-Encoding: base64 X-Attachment-Id: f_hzj8yzql1 ZXJsQHBpZ2d5bGVmdDp+L3NjcmF0Y2ggJSAuL2V4ZWNfY21kLnB5IGxzClsnbHMnXQoqKioqKiBv dXRwdXQgc3RhcnQgKioqKioKZXhlY19jbWQucHkKdHlwZXNjcmlwdAoKKioqKiogb3V0cHV0IGVu ZCAqKioqKgplcmxAcGlnZ3lsZWZ0On4vc2NyYXRjaCAlIC4vZXhlY19jbWQucHkgbHMgLWEKWyds cycsICctYSddCioqKioqIG91dHB1dCBzdGFydCAqKioqKgpleGVjX2NtZC5weQp0eXBlc2NyaXB0 CgoqKioqKiBvdXRwdXQgZW5kICoqKioqCmVybEBwaWdneWxlZnQ6fi9zY3JhdGNoICUgLi9leGVj X2NtZC5weSBscyAtYWwKWydscycsICctYWwnXQpJbGxlZ2FsIG9wdGlvbiAtbApFeGNlcHRpb246 IENvbW1hbmQgJ1snbHMnLCAnLWFsJ10nIHJldHVybmVkIG5vbi16ZXJvIGV4aXQgc3RhdHVzIDIK ZXJsQHBpZ2d5bGVmdDp+L3NjcmF0Y2ggJSAuL2V4ZWNfY21kLnB5IGxzIC1sClsnbHMnLCAnLWwn XQpJbGxlZ2FsIG9wdGlvbiAtbApFeGNlcHRpb246IENvbW1hbmQgJ1snbHMnLCAnLWwnXScgcmV0 dXJuZWQgbm9uLXplcm8gZXhpdCBzdGF0dXMgMgplcmxAcGlnZ3lsZWZ0On4vc2NyYXRjaCAlIC4v ZXhlY19jbWQucHkgJ2xzIC1sJwpbJ2xzIC1sJ10KKioqKiogb3V0cHV0IHN0YXJ0ICoqKioqCnRv dGFsIDgKLXJ3eHItLXItLSAgMSBlcmwgIGVybCAgNDg0IFNlcCAgMSAxMTowNyBleGVjX2NtZC5w eQotcnctci0tci0tICAxIGVybCAgZXJsICA0OTAgU2VwICAxIDExOjE2IHR5cGVzY3JpcHQKCioq KioqIG91dHB1dCBlbmQgKioqKioKZXJsQHBpZ2d5bGVmdDp+L3NjcmF0Y2ggJSAuL2V4ZWNfY21k LnB5ICdscyAtYWwnClsnbHMgLWFsJ10KKioqKiogb3V0cHV0IHN0YXJ0ICoqKioqCnRvdGFsIDE2 CmRyd3hyLXhyLXggICAyIGVybCAgZXJsICAgNTEyIFNlcCAgMSAxMToxNSAuCmRyd3hyLXhyLXgg IDExIGVybCAgZXJsICAxMDI0IFNlcCAgMSAxMToxNSAuLgotcnd4ci0tci0tICAgMSBlcmwgIGVy bCAgIDQ4NCBTZXAgIDEgMTE6MDcgZXhlY19jbWQucHkKLXJ3LXItLXItLSAgIDEgZXJsICBlcmwg ICA0OTAgU2VwICAxIDExOjE2IHR5cGVzY3JpcHQKCioqKioqIG91dHB1dCBlbmQgKioqKioK --f46d0442805eae002b0501f899e3--