From: Mikhail Ivashinenko <miuivashinenko@sberdevices.ru>
Date: Wed, 28 Jan 2026 17:53:30 +0000 (+0300)
Subject: amixer: support infinite line length for --stdin option
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=aae3f6d7874c0d4304d3f2ead6f1a2b983b5fead;p=alsa-utils.git

amixer: support infinite line length for --stdin option

Closes: https://github.com/alsa-project/alsa-utils/pull/321
Signed-off-by: Mikhail Ivashinenko <miuivashinenko@salutedevices.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---

diff --git a/amixer/amixer.c b/amixer/amixer.c
index 07e9819..9eb7f73 100644
--- a/amixer/amixer.c
+++ b/amixer/amixer.c
@@ -1760,13 +1760,14 @@ static int split_line(char *buf, char **token, int max_token)
 static int exec_stdin(void)
 {
 	int narg;
-	char buf[256], *args[MAX_ARGS];
+	char *buf = NULL, *args[MAX_ARGS];
+	size_t size = 0;
 	int err = 0;
 
 	/* quiet = 1; */
 	ignore_error = 1;
 
-	while (fgets(buf, sizeof(buf), stdin)) {
+	while (getline(&buf, &size, stdin) > 0) {
 		narg = split_line(buf, args, MAX_ARGS);
 		if (narg > 0) {
 			if (!strcmp(args[0], "sset") || !strcmp(args[0], "set"))
@@ -1774,10 +1775,12 @@ static int exec_stdin(void)
 			else if (!strcmp(args[0], "cset"))
 				err = cset(narg - 1, args + 1, 0, 1);
 			if (err < 0)
-				return 1;
+				break;
 		}
 	}
-	return 0;
+
+	free(buf);
+	return err < 0 ? 1 : 0;
 }