>From c36b20e51f028d13d06c27d86c0cf009313bacd3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?P=C3=A1draig=20Brady?= Date: Fri, 14 Jan 2011 08:46:21 +0000 Subject: [PATCH] join: ensure --header skips the order check with empty files * src/join.c: Skip the header even if one of the files is empty. * tests/misc/join: Add a test case. * NEWS: Mention the fix --- NEWS | 3 +++ src/join.c | 12 ++++++++---- tests/misc/join | 6 ++++++ 3 files changed, 17 insertions(+), 4 deletions(-) diff --git a/NEWS b/NEWS index 9ccad63..82565b0 100644 --- a/NEWS +++ b/NEWS @@ -13,6 +13,9 @@ GNU coreutils NEWS -*- outline -*- rm -f no longer fails for EINVAL or EILSEQ on file systems that reject file names invalid for that file system. + join --header now skips the ordering check for the first line + even if the other file is empty. + * Noteworthy changes in release 8.9 (2011-01-04) [stable] diff --git a/src/join.c b/src/join.c index afda5a1..07ac856 100644 --- a/src/join.c +++ b/src/join.c @@ -627,13 +627,17 @@ join (FILE *fp1, FILE *fp2) initseq (&seq2); getseq (fp2, &seq2, 2); - if (join_header_lines && seq1.count && seq2.count) + if (join_header_lines && (seq1.count || seq2.count)) { - prjoin (seq1.lines[0], seq2.lines[0]); + struct line const *hline1 = seq1.count ? seq1.lines[0] : &uni_blank; + struct line const *hline2 = seq2.count ? seq2.lines[0] : &uni_blank; + prjoin (hline1, hline2); prevline[0] = NULL; prevline[1] = NULL; - advance_seq (fp1, &seq1, true, 1); - advance_seq (fp2, &seq2, true, 2); + if (seq1.count) + advance_seq (fp1, &seq1, true, 1); + if (seq2.count) + advance_seq (fp2, &seq2, true, 2); } while (seq1.count && seq2.count) diff --git a/tests/misc/join b/tests/misc/join index 3696a03..0299427 100755 --- a/tests/misc/join +++ b/tests/misc/join @@ -219,6 +219,12 @@ my @tv = ( [ "ID1 Name\n1 A\n2 B\n", "ID2 Color\n1 red\n"], "ID1 Name Color\n1 A red\n", 0], +# '--header' doesn't check order of a header +# even if there is no header in the second file +['header-6', '--header -a1', + [ "ID1 Name\n1 A\n", ""], + "ID1 Name\n1 A\n", 0], + ); # Convert the above old-style test vectors to the newer -- 1.7.3.4