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add a stub --speed-large-files for compatibility with GNU diff

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There is no intention to implement it, but lots of scripts/tools using
diff(1) passes GNU diff option
This commit is contained in:
Baptiste Daroussin 2017-04-08 08:46:02 +00:00
parent bcc76a2e83
commit a077708d35
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=316639
2 changed files with 10 additions and 1 deletions
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7
usr.bin/diff/diff.1
View File

@ -30,7 +30,7 @@
.\" @(#)diff.1 8.1 (Berkeley) 6/30/93
.\" $FreeBSD$
.\"
.Dd March 22, 2017
.Dd April 8, 2017
.Dt DIFF 1
.Os
.Sh NAME
@ -57,6 +57,7 @@
.Op Fl -rcs
.Op Fl -show-c-function
.Op Fl -starting-file
.Op Fl -speed-large-files
.Op Fl -strip-trailing-cr
.Op Fl -tabsize
.Op Fl -text
@ -82,6 +83,7 @@
.Op Fl -paginate
.Op Fl -rcs
.Op Fl -show-c-function
.Op Fl -speed-large-files
.Op Fl -starting-file
.Op Fl -strip-trailing-cr
.Op Fl -tabsize
@ -105,6 +107,7 @@
.Op Fl -paginate
.Op Fl -rcs
.Op Fl -show-c-function
.Op Fl -speed-large-files
.Op Fl -starting-file
.Op Fl -strip-trailing-cr
.Op Fl -tabsize
@ -129,6 +132,7 @@
.Op Fl -paginate
.Op Fl -rcs
.Op Fl -show-c-function
.Op Fl -speed-large-files
.Op Fl -starting-file
.Op Fl -strip-trailing-cr
.Op Fl -tabsize
@ -159,6 +163,7 @@
.Op Fl -recursive
.Op Fl -report-identical-files
.Op Fl -show-c-function
.Op Fl -speed-large-files
.Op Fl -strip-trailing-cr
.Op Fl -tabsize
.Op Fl -text

4
usr.bin/diff/diff.c
View File

@ -55,6 +55,7 @@ enum {
OPT_NO_IGN_FN_CASE,
OPT_NORMAL,
OPT_HORIZON_LINES,
OPT_SPEED_LARGE_FILES,
};
static struct option longopts[] = {
@ -87,6 +88,7 @@ static struct option longopts[] = {
{ "horizon-lines", required_argument, NULL, OPT_HORIZON_LINES },
{ "no-ignore-file-name-case", no_argument, NULL, OPT_NO_IGN_FN_CASE },
{ "normal", no_argument, NULL, OPT_NORMAL },
{ "speed-large-files", no_argument, NULL, OPT_SPEED_LARGE_FILES},
{ "strip-trailing-cr", no_argument, NULL, OPT_STRIPCR },
{ "tabsize", optional_argument, NULL, OPT_TSIZE },
{ NULL, 0, 0, '\0'}
@ -245,6 +247,8 @@ main(int argc, char **argv)
usage();
}
break;
case OPT_SPEED_LARGE_FILES:
break; /* ignore but needed for compatibility with GNU diff */
case OPT_STRIPCR:
dflags |= D_STRIPCR;
break;