From e68edb8cf06a796453378b98d963692c838c400f Mon Sep 17 00:00:00 2001 From: Kyle Evans Date: Sun, 19 Aug 2018 03:57:20 +0000 Subject: diff(1): Implement -B/--ignore-blank-lines As noted by cem in r338035, coccinelle invokes diff(1) with the -B flag. This was not previously implemented here, so one was forced to create a link for GNU diff to /usr/local/bin/diff Implement the -B flag and add some primitive tests for it. It is implemented in the same fashion that -I is implemented; each chunk's lines are scanned, and if a non-blank line is encountered then the chunk will be output. Otherwise, it's skipped. MFC after: 2 weeks --- usr.bin/diff/diff.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) (limited to 'usr.bin/diff/diff.c') diff --git a/usr.bin/diff/diff.c b/usr.bin/diff/diff.c index e12697c4e89e..dbb6528c254f 100644 --- a/usr.bin/diff/diff.c +++ b/usr.bin/diff/diff.c @@ -66,6 +66,7 @@ static struct option longopts[] = { { "ed", no_argument, 0, 'e' }, { "forward-ed", no_argument, 0, 'f' }, { "speed-large-files", no_argument, NULL, 'H' }, + { "ignore-blank-lines", no_argument, 0, 'B' }, { "ignore-matching-lines", required_argument, 0, 'I' }, { "ignore-case", no_argument, 0, 'i' }, { "paginate", no_argument, NULL, 'l' }, @@ -164,6 +165,9 @@ main(int argc, char **argv) case 'h': /* silently ignore for backwards compatibility */ break; + case 'B': + dflags |= D_SKIPBLANKLINES; + break; case 'I': push_ignore_pats(optarg); break; @@ -447,18 +451,18 @@ void usage(void) { (void)fprintf(stderr, - "usage: diff [-abdilpTtw] [-c | -e | -f | -n | -q | -u] [--ignore-case]\n" + "usage: diff [-aBbdilpTtw] [-c | -e | -f | -n | -q | -u] [--ignore-case]\n" " [--no-ignore-case] [--normal] [--strip-trailing-cr] [--tabsize]\n" " [-I pattern] [-L label] file1 file2\n" - " diff [-abdilpTtw] [-I pattern] [-L label] [--ignore-case]\n" + " diff [-aBbdilpTtw] [-I pattern] [-L label] [--ignore-case]\n" " [--no-ignore-case] [--normal] [--strip-trailing-cr] [--tabsize]\n" " -C number file1 file2\n" - " diff [-abdiltw] [-I pattern] [--ignore-case] [--no-ignore-case]\n" + " diff [-aBbdiltw] [-I pattern] [--ignore-case] [--no-ignore-case]\n" " [--normal] [--strip-trailing-cr] [--tabsize] -D string file1 file2\n" - " diff [-abdilpTtw] [-I pattern] [-L label] [--ignore-case]\n" + " diff [-aBbdilpTtw] [-I pattern] [-L label] [--ignore-case]\n" " [--no-ignore-case] [--normal] [--tabsize] [--strip-trailing-cr]\n" " -U number file1 file2\n" - " diff [-abdilNPprsTtw] [-c | -e | -f | -n | -q | -u] [--ignore-case]\n" + " diff [-aBbdilNPprsTtw] [-c | -e | -f | -n | -q | -u] [--ignore-case]\n" " [--no-ignore-case] [--normal] [--tabsize] [-I pattern] [-L label]\n" " [-S name] [-X file] [-x pattern] dir1 dir2\n"); -- cgit v1.3