From: Anton Khirnov <anton@khirnov.net>
Date: Wed, 6 Aug 2025 08:28:15 +0000 (+0200)
Subject: amixer: always use line buffering for (s)events
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=bcbdf24e014ec7bf17d2dd6a987fb206c6f2241e;p=alsa-utils.git

amixer: always use line buffering for (s)events

Line buffering is the obviously correct mode for (s)events, but block
buffering would typically be used when piping its output to another
program.

Closes: https://github.com/alsa-project/alsa-utils/pull/306
Signed-off-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---

diff --git a/amixer/amixer.c b/amixer/amixer.c
index 5ca81ff..cc71fbe 100644
--- a/amixer/amixer.c
+++ b/amixer/amixer.c
@@ -1596,6 +1596,8 @@ static int events(int argc ATTRIBUTE_UNUSED, char *argv[] ATTRIBUTE_UNUSED)
 	snd_hctl_elem_t *helem;
 	int err;
 
+	setlinebuf(stdout);
+
 	if ((err = snd_hctl_open(&handle, card, 0)) < 0) {
 		error("Control %s open error: %s\n", card, snd_strerror(err));
 		return err;
@@ -1675,6 +1677,8 @@ static int sevents(int argc ATTRIBUTE_UNUSED, char *argv[] ATTRIBUTE_UNUSED)
 	snd_mixer_t *handle;
 	int err;
 
+	setlinebuf(stdout);
+
 	if ((err = snd_mixer_open(&handle, 0)) < 0) {
 		error("Mixer %s open error: %s", card, snd_strerror(err));
 		return err;