Date: Mon, 14 Aug 2017 21:48:50 +0000 (UTC) From: Kyle Evans <kevans@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r322520 - stable/11/usr.bin/grep Message-ID: <201708142148.v7ELmoMo078922@repo.freebsd.org>
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Author: kevans Date: Mon Aug 14 21:48:50 2017 New Revision: 322520 URL: https://svnweb.freebsd.org/changeset/base/322520 Log: MFC r313948: bsdgrep: fix EOF handling with --mmap Rework part of the loop in grep_fgetln to return the rest of the line and ensure that we still advance the buffer by the length of the rest of the line. PR: 165471 Approved by: emaste (mentor) Modified: stable/11/usr.bin/grep/file.c Directory Properties: stable/11/ (props changed) Modified: stable/11/usr.bin/grep/file.c ============================================================================== --- stable/11/usr.bin/grep/file.c Mon Aug 14 20:53:01 2017 (r322519) +++ stable/11/usr.bin/grep/file.c Mon Aug 14 21:48:50 2017 (r322520) @@ -219,12 +219,18 @@ grep_fgetln(struct file *f, size_t *lenp) if (bufrem == 0) /* EOF: return partial line */ break; - if ((p = memchr(bufpos, '\n', bufrem)) == NULL) + if ((p = memchr(bufpos, '\n', bufrem)) == NULL && + filebehave != FILE_MMAP) continue; - /* got it: finish up the line (like code above) */ - ++p; - diff = p - bufpos; - len += diff; + if (p == NULL) { + /* mmap EOF: return partial line, consume buffer */ + diff = len; + } else { + /* got it: finish up the line (like code above) */ + ++p; + diff = p - bufpos; + len += diff; + } if (grep_lnbufgrow(len)) goto error; memcpy(lnbuf + off, bufpos, diff);
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