Path: csiph.com!xmission!news.snarked.org!news.linkpendium.com!news.linkpendium.com!panix!usenet.stanford.edu!not-for-mail From: Chet Ramey Newsgroups: gnu.bash.bug Subject: Re: Preventing Bash Variable Confusion Date: Wed, 29 Jan 2020 09:45:07 -0500 Lines: 14 Approved: bug-bash@gnu.org Message-ID: References: <20200128210225.GC12574@localhost4.local> <20806.1580277461@jinx.noi.kre.to> <20200129142305.GX1350@eeg.ccf.org> <77993d73-c622-b646-55d5-e8b370f742de@case.edu> Reply-To: chet.ramey@case.edu NNTP-Posting-Host: lists.gnu.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Trace: usenet.stanford.edu 1580309114 11393 209.51.188.17 (29 Jan 2020 14:45:14 GMT) X-Complaints-To: action@cs.stanford.edu Cc: chet.ramey@case.edu To: bug-bash@gnu.org Envelope-to: bug-bash@gnu.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=case.edu; s=smtp-primary; t=1580309110; bh=3AWghC2cXgMlSMKERjGfdTy9io/RsgX5W4NH3a3mwdM=; h=Reply-To:Cc:Subject:To:References:From:Message-ID:Date: MIME-Version:In-Reply-To:Content-Type:Content-Transfer-Encoding; 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Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 In-Reply-To: <20200129142305.GX1350@eeg.ccf.org> Content-Language: en-US X-Junkmail-Status: score=7/90, host=mpv3-2015.case.edu X-Junkmail-PrAS-Raw: score=7/90, refid=2.7.2:2020.1.29.135418:17:7.944, ip=, rules=DKIM_SIGNATURE, __HAS_REPLYTO, __HAS_CC_HDR, __SUBJ_REPLY, __BOUNCE_CHALLENGE_SUBJ, __BOUNCE_NDR_SUBJ_EXEMPT, __SUBJ_ALPHA_END, __TO_MALFORMED_2, __TO_NO_NAME, __HAS_REFERENCES, __REFERENCES, __HAS_FROM, FROM_EDU_TLD, __HAS_MSGID, __SANE_MSGID, DATE_TZ_NA, __USER_AGENT, __MOZILLA_USER_AGENT, __MIME_VERSION, __IN_REP_TO, __CT, __CT_TEXT_PLAIN, __CTE, __REPLYTO_SAMEAS_FROM_ADDY, __REPLYTO_SAMEAS_FROM_ACC, __FROM_DOMAIN_IN_ANY_CC1, __FROM_DOMAIN_IN_ANY_CC2, __REPLYTO_SAMEAS_FROM_DOMAIN, __DKIM_ALIGNS_1, __DKIM_ALIGNS_2, __ANY_URI, __URI_MAILTO, __URI_WITH_PATH, __URI_ENDS_IN_SLASH, __URI_NO_WWW, __CP_URI_IN_BODY, __SUBJ_ALPHA_NEGATE, __URI_IN_BODY, __URI_NOT_IMG, __MAIL_CHAIN, __BODY_NO_MAILTO, __NO_HTML_TAG_RAW, BODYTEXTP_SIZE_3000_LESS, BODY_SIZE_400_499, __MIME_TEXT_P1, __MIME_TEXT_ONLY, __URI_NS, SXL_IP_TFX_WM[202.103.22.129.fur], HTML_00_01, [TRUNCATED], so=2010-03-03 19:42:08, dmn=2016-08-03-0138 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] [fuzzy] X-Received-From: 129.22.103.194 X-BeenThere: bug-bash@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Bug reports for the GNU Bourne Again SHell List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Mailman-Original-Message-ID: <77993d73-c622-b646-55d5-e8b370f742de@case.edu> X-Mailman-Original-References: <20200128210225.GC12574@localhost4.local> <20806.1580277461@jinx.noi.kre.to> <20200129142305.GX1350@eeg.ccf.org> Xref: csiph.com gnu.bash.bug:15837 On 1/29/20 9:23 AM, Greg Wooledge wrote: > As long as you use at least one lowercase letter in your variable name, > you are guaranteed not to conflict with any internal shell variables. As long as you use mixed case. There are two lowercase shell variables bash looks at: auto_resume and histchars. -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/