Date: Fri, 9 Oct 1998 17:49:10 +0900 (JST) From: fujimoto@oscar.elec.waseda.ac.jp To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: bin/8225: /usr/bin/head -c never exit for short inputs Message-ID: <199810090849.RAA27839@ns.kf.mnc.waseda.ac.jp>
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>Number: 8225 >Category: bin >Synopsis: /usr/bin/head -c never exit for short inputs >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Oct 9 01:50:00 PDT 1998 >Last-Modified: >Originator: FUJIMOTO Kensaku >Organization: Waseda University >Release: FreeBSD 2.2.7-RELEASE i386 >Environment: FreeBSD /usr/bin/head with "-c" option has this bug. FreeBSD 2.2.7-RELEASE and FreeBSD-current also contain it. >Description: "head -c <n>" never exit and loops forever (until it is killed), if the input stream has fewer bytes than specified (n). >How-To-Repeat: echo abc | head -c 10 >Fix: Please apply the patch below: --- ../ORIG/head/head.c Mon Sep 15 17:17:20 1997 +++ head.c Fri Oct 9 17:10:04 1998 @@ -155,7 +155,7 @@ else readlen = sizeof(buf); readlen = fread(buf, sizeof(char), readlen, fp); - if (readlen == EOF) + if (readlen == 0) break; if (fwrite(buf, sizeof(char), readlen, stdout) != readlen) err(1, "stdout"); >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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