From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Tue, 25 Jan 2022 15:18:09 +0100 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1nCMe9-00CuDT-6M for lore@lore.pengutronix.de; Tue, 25 Jan 2022 15:18:09 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nCMe7-00063z-RT for lore@pengutronix.de; Tue, 25 Jan 2022 15:18:08 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:From:In-Reply-To:MIME-Version: References:Message-ID:Subject:Cc:To:Date:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=PHRXnjeQXqB2K7Fcc3tgTN1bT1nJfhSOxDkhOsNHDIg=; b=VADaiVzvzxlqG5PAI1UsmlaBqD utoH2DLT2yPlX6z/9l8QNDA5u2xKkazxhWfUsFZnZ+B+fDQ9+TRcRkig/Wla42TEGKIMK5j9Qo8mN BJ6Tvr3amPTvkn7ssiYJLc2rWsJBgsIpB+YdMagWNzTGA0W+gdMXFDrYvzbd9IXiyLclYZ1ejOckf 0NUCTlPX0CEhAjYfymObtRPFE6wXcch6O1nya874N9S/GdOm3VDxOsIgFOrZG47F3rq7Y6a84gNd/ wHhUu+682uQkhBuuknbc+E5B6CUo/IwO8zqaHTBZxXkXrBV6Hk17fkikbGrAEO6W2wKOgYCjgGyuy 0SO+G3qQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nCMcd-00856Y-3y; Tue, 25 Jan 2022 14:16:35 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nCMcU-00854R-KI for barebox@lists.infradead.org; Tue, 25 Jan 2022 14:16:31 +0000 Received: from ptx.hi.pengutronix.de ([2001:67c:670:100:1d::c0]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nCMcR-0005lZ-Gn; Tue, 25 Jan 2022 15:16:23 +0100 Received: from sha by ptx.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1nCMcQ-0002BW-Vw; Tue, 25 Jan 2022 15:16:22 +0100 Date: Tue, 25 Jan 2022 15:16:22 +0100 To: Frank Wunderlich Cc: barebox@lists.infradead.org Message-ID: <20220125141622.GC23490@pengutronix.de> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-IRC: #ptxdist @freenode X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-Uptime: 14:28:51 up 45 days, 22:14, 87 users, load average: 0.25, 0.23, 0.25 User-Agent: Mutt/1.10.1 (2018-07-13) From: Sascha Hauer X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220125_061626_688184_90069E24 X-CRM114-Status: GOOD ( 25.40 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:e::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.7 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: use string as variable name X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) Hi Frank, On Sun, Jan 23, 2022 at 10:58:36AM +0100, Frank Wunderlich wrote: > Hi, > > is it possible to use a string as variable-name? > > example: > > i=1 > img_$i=foo > > now i have defined $img_1, but how to display it using $i again? > > echo ${img_$i} > echo ${img_${i}} > > alternative may be a variable-array, but it seems not possible > > img[$i]=bar > img[1]=bar: No such file or directory > > i just want to create a dynamic list and access the items of this list by index > > another way may be appending new string with separator to existing string and split afterwards, > but then i have the index-problem again. > > i know barebox shell is limited (but much more mighty than expected for just a bootloader), > but maybe it is possible :) Nah, you're kidding, the barebox shell is not limited ;) #!/bin/sh list="foo bar baz" index=$1 i=0 for elem in $list; do let i=$i+1 if [ "$i" = "$index" ]; then result="$elem" fi done echo result: $result Regards, Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox