> Date: Thu, 20 Jun 2013 17:03:48 +1000
> From: Jonathan Gray <[email protected]>
>
> Default to stdin/stdout if no input files are
> given to indent. FreeBSD and GNU indent have had
> this behaviour for a long time now.
>
> Based on FreeBSD svn rev 40502 from back in 1998.
Makes sense to me.
ok kettenis@
> Index: indent.1
> ===================================================================
> RCS file: /cvs/src/usr.bin/indent/indent.1,v
> retrieving revision 1.21
> diff -u -p -r1.21 indent.1
> --- indent.1 20 Jun 2013 06:28:15 -0000 1.21
> +++ indent.1 20 Jun 2013 06:50:52 -0000
> @@ -41,7 +41,7 @@
> .Sh SYNOPSIS
> .Nm indent
> .Bk -words
> -.Ar input-file Op Ar output-file
> +.Op Ar input-file Op Ar output-file
> .Op Fl bad | nbad
> .Op Fl bap | nbap
> .Op Fl bbb | nbbb
> @@ -114,6 +114,11 @@ is specified,
> .Nm
> checks to make sure it is different from
> .Ar input-file .
> +.Pp
> +If no
> +.Ar input-file
> +is specified
> +input is read from stdin and the formatted file is written to stdout.
> .Pp
> The options listed below control the formatting style imposed by
> .Nm .
> Index: indent.c
> ===================================================================
> RCS file: /cvs/src/usr.bin/indent/indent.c,v
> retrieving revision 1.21
> diff -u -p -r1.21 indent.c
> --- indent.c 20 Jun 2013 06:28:15 -0000 1.21
> +++ indent.c 20 Jun 2013 06:50:52 -0000
> @@ -198,11 +198,10 @@ main(int argc, char **argv)
> set_option(argv[i]);
> } /* end of for */
> if (input == NULL) {
> - fprintf(stderr, "usage: indent input-file [output-file] [options]\n");
> - exit(1);
> + input = stdin;
> }
> if (output == NULL) {
> - if (troff)
> + if (troff || input == stdin)
> output = stdout;
> else {
> out_name = in_name;
>
>
