git: 81b3a7991543 - stable/15 - virtual_oss_cmd(8): Improve error messages

The branch stable/15 has been updated by christos:

URL: https://cgit.FreeBSD.org/src/commit/?id=81b3a7991543e1cf2f279e474c9636f2a0ce2e6e

commit 81b3a7991543e1cf2f279e474c9636f2a0ce2e6e
Author:     Christos Margiolis <christos@FreeBSD.org>
AuthorDate: 2026-06-02 12:57:45 +0000
Commit:     Christos Margiolis <christos@FreeBSD.org>
CommitDate: 2026-06-09 10:46:47 +0000

    virtual_oss_cmd(8): Improve error messages
    
    Sponsored by:   The FreeBSD Foundation
    MFC after:      1 week
    
    (cherry picked from commit 4f7092eeb22d3882f54d67a35149533fef8376ca)
---
 usr.sbin/virtual_oss/virtual_oss_cmd/command.c | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/usr.sbin/virtual_oss/virtual_oss_cmd/command.c b/usr.sbin/virtual_oss/virtual_oss_cmd/command.c
index 64781992ddfd..99316b896e83 100644
--- a/usr.sbin/virtual_oss/virtual_oss_cmd/command.c
+++ b/usr.sbin/virtual_oss/virtual_oss_cmd/command.c
@@ -35,20 +35,11 @@
 
 #include "virtual_oss.h"
 
-static void
-message(const char *fmt, ...)
-{
-	va_list list;
-
-	va_start(list, fmt);
-	vfprintf(stderr, fmt, list);
-	va_end(list);
-}
-
-static void
+static void __dead2
 usage(void)
 {
-	message("Usage: virtual_oss_cmd /dev/vdsp.ctl [command line arguments to pass to virtual_oss]\n");
+	fprintf(stderr, "usage: %s <control_device> [virtual_oss(8) command "
+	    "line options]\n", getprogname());
 	exit(EX_USAGE);
 }
 
@@ -66,7 +57,7 @@ main(int argc, char **argv)
 
 	fd = open(argv[1], O_RDWR);
 	if (fd < 0)
-		errx(EX_SOFTWARE, "Could not open '%s'", argv[1]);
+		err(EX_SOFTWARE, "Could not open control device: %s", argv[1]);
 
 	for (int x = 2; x != argc; x++) {
 		size_t tmp = strlen(argv[x]) + 1;