From bb3080b84d578420d338dce2d7c475e540858ed9 Mon Sep 17 00:00:00 2001
From: kris <kris@FreeBSD.org>
Date: Mon, 7 Jun 1999 13:53:57 +0000
Subject: Changes from OpenBSD: 	* Better usage() - correct syntax, display
 available commands 	  instead of examples 	* Accept command abbreviations
 	* sprintf -> snprintf (for paranoia) 	* manpage capitalisation tweak

Obtained from:	OpenBSD
---
 bin/chio/Makefile |  4 ++--
 bin/chio/chio.1   |  4 ++--
 bin/chio/chio.c   | 35 +++++++++++++++++++++++------------
 3 files changed, 27 insertions(+), 16 deletions(-)

diff --git a/bin/chio/Makefile b/bin/chio/Makefile
index 7f56f9e..f5d2d78 100644
--- a/bin/chio/Makefile
+++ b/bin/chio/Makefile
@@ -1,7 +1,7 @@
-#	$Id: Makefile,v 1.2 1997/09/12 15:00:06 jkh Exp $
+#	$Id: Makefile,v 1.3 1998/09/15 07:48:51 gibbs Exp $
 #	@(#)Makefile	8.1 (Berkeley) 6/6/93
 
-CFLAGS+=-I${.CURDIR}/../../sys
+CFLAGS+=-I${.CURDIR}/../../sys -W -Wall
 
 PROG=	chio
 SRCS=	chio.c
diff --git a/bin/chio/chio.1 b/bin/chio/chio.1
index 27fee8d..344b587 100644
--- a/bin/chio/chio.1
+++ b/bin/chio/chio.1
@@ -30,7 +30,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$Id: chio.1,v 1.7 1998/09/15 07:48:51 gibbs Exp $
+.\"	$Id: chio.1,v 1.8 1998/11/30 23:05:38 billf Exp $
 .\"
 .Dd May 14, 1998
 .Dt CHIO 1
@@ -135,7 +135,7 @@ respectively.
 .Pp
 Note that not all medium changers support the
 .Ic exchange
-operation; The changer must have multiple free pickers or emulate
+operation; the changer must have multiple free pickers or emulate
 multiple free pickers with transient storage.
 .It Xo Nm position
 .Ar <to ET> <to EU>
diff --git a/bin/chio/chio.c b/bin/chio/chio.c
index fb82fe6..3601649 100644
--- a/bin/chio/chio.c
+++ b/bin/chio/chio.c
@@ -77,23 +77,23 @@ static	int do_voltag(char *, int, char **);
 
 /* Valid changer element types. */
 const struct element_type elements[] = {
+	{ "drive",		CHET_DT },
 	{ "picker",		CHET_MT },
-	{ "slot",		CHET_ST },
 	{ "portal",		CHET_IE },
-	{ "drive",		CHET_DT },
+	{ "slot",		CHET_ST },
 	{ NULL,			0 },
 };
 
 /* Valid commands. */
 const struct changer_command commands[] = {
-	{ "move",		do_move },
 	{ "exchange",		do_exchange },
-	{ "position",		do_position },
-	{ "params",		do_params },
 	{ "getpicker",		do_getpicker },
+	{ "ielem", 		do_ielem },
+	{ "move",		do_move },
+	{ "params",		do_params },
+	{ "position",		do_position },
 	{ "setpicker",		do_setpicker },
 	{ "status",		do_status },
-	{ "ielem", 		do_ielem },
 	{ "voltag",		do_voltag },
 	{ NULL,			0 },
 };
@@ -147,6 +147,14 @@ main(int argc, char *argv[])
 	for (i = 0; commands[i].cc_name != NULL; ++i)
 		if (strcmp(*argv, commands[i].cc_name) == 0)
 			break;
+	if (commands[i].cc_name == NULL) {
+		/* look for abbreviation */
+		for (i = 0; commands[i].cc_name != NULL; ++i)
+			if (strncmp(*argv, commands[i].cc_name,
+			    strlen(*argv)) == 0)
+				break;
+	}    
+
 	if (commands[i].cc_name == NULL)
 		errx(1, "unknown command: %s", *argv);
 
@@ -881,7 +889,9 @@ bits_to_string(int v, const char *cp)
 			np++;
 		if ((v & (1 << (f - 1))) == 0)
 			continue;
-		bp += sprintf(bp, "%c%.*s", sep, (int)(long)(np - cp), cp);
+		(void) snprintf(bp, sizeof(buf) - (bp - &buf[0]),
+			       "%c%.*s", sep, (int)(long)(np - cp), cp);
+		bp += strlen(bp);
 		sep = ',';
 	}
 	if (sep != '<')
@@ -900,11 +910,12 @@ cleanup()
 static void
 usage()
 {
+	int i;
 
-	(void) fprintf(stderr, "usage: %s command arg1 arg2 ...\n", __progname);
-	(void) fprintf(stderr, "Examples:\n");
-	(void) fprintf(stderr, "\tchio -f /dev/ch0 move slot 1 drive 0\n");
-	(void) fprintf(stderr, "\tchio ielem\n");
-	(void) fprintf(stderr, "\tchio -f /dev/ch1 status\n");
+	(void) fprintf(stderr, "usage: %s [-f device] command [-<flags>] [args ...]\n", __progname);
+	(void) fprintf(stderr, "commands:");
+	for (i = 0; commands[i].cc_name; i++)
+	    (void) fprintf(stderr, " %s", commands[i].cc_name);
+	(void) fprintf(stderr, "\n");
 	exit(1);
 }
-- 
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