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	add option -h for usage - scroll - scrollbackbuffer program for st
	git clone git://git.suckless.org/scroll
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	---
	commit 7a2762d0c1e59cd9d6a69d882931befeb4af25b5
	parent c63796d9bdb510b9486b684d93bdd2658ac3abd3
	Author: Jan Klemkow <[email protected]>
	Date: Tue, 14 Apr 2020 21:15:19 +0200

	add option -h for usage

	Diffstat:
	M scroll.1 \| 5 ++++-
	M scroll.c \| 5 +++--

	2 files changed, 7 insertions(+), 3 deletions(-)
	---
	diff --git a/scroll.1 b/scroll.1
	@@ -21,7 +21,7 @@
	.Nd scrollback buffer
	.Sh SYNOPSIS
	.Nm
	-.Op Fl M
	+.Op Fl Mh
	.Op Fl m Ar size
	.Op program Op arg ...
	.Sh DESCRIPTION
	@@ -38,6 +38,9 @@ starts the users default shell.
	.Pp
	The options are as follows:
	.Bl -tag -width Ds
	+.It Fl h
	+Shows usage of
	+.Nm .
	.It Fl M
	Set memory limit used for scrollbackbuffer to maximum.
	.It Fl m Ar size
	diff --git a/scroll.c b/scroll.c
	@@ -370,7 +370,7 @@ jumpdown(char *buf, size_t size)

	void
	usage(void) {
	- die("usage: scroll [-M] [-m mem] [program]");
	+ die("usage: scroll [-Mh] [-m mem] [program]");
	}

	int
	@@ -382,7 +382,7 @@ main(int argc, char *argv[])
	if (getrlimit(RLIMIT_DATA, &rlimit) == -1)
	die("getrlimit");

	- while ((ch = getopt(argc, argv, "Mm:")) != -1) {
	+ while ((ch = getopt(argc, argv, "Mm:h")) != -1) {
	switch (ch) {
	case 'M':
	rlimit.rlim_cur = rlimit.rlim_max;
	@@ -392,6 +392,7 @@ main(int argc, char *argv[])
	if (errno != 0)
	die("strtoull: %s", optarg);
	break;
	+ case 'h':
	default:
	usage();
	}