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Show sequencer sound card numer/PID via aconnect

Message ID 1455370937-501-2-git-send-email-martin@mail.zuhause (mailing list archive)
State New, archived
Headers show

Commit Message

Martin Koegler Feb. 13, 2016, 1:42 p.m. UTC 
From: Martin Koegler <martin.koegler@chello.at>

rawmidi devices expose the card number via IOCTLs, which allows to
find the corresponding device in sysfs.

The sequencer provides no identifing data. Chromium works around this
issue by scanning rawmidi as well as sequencer devices and matching
them by using assumtions, how the kernel register sequencer devices.

This patch adds support for displaying the sound card number/PID to
aconnect.

Signed-off-by: Martin Koegler <martin.koegler@chello.at>
---
 seq/aconnect/aconnect.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
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Patch

diff --git a/seq/aconnect/aconnect.c b/seq/aconnect/aconnect.c
index 8d6cebb..3508e1b 100644
--- a/seq/aconnect/aconnect.c
+++ b/seq/aconnect/aconnect.c
@@ -166,11 +166,19 @@  static void print_port(snd_seq_t *seq, snd_seq_client_info_t *cinfo,
 		       snd_seq_port_info_t *pinfo, int count)
 {
 	if (! count) {
-		printf(_("client %d: '%s' [type=%s]\n"),
+		printf(_("client %d: '%s' [type=%s"),
 		       snd_seq_client_info_get_client(cinfo),
 		       snd_seq_client_info_get_name(cinfo),
 		       (snd_seq_client_info_get_type(cinfo) == SND_SEQ_USER_CLIENT ?
 			_("user") : _("kernel")));
+		int owner = snd_seq_client_info_get_owner(cinfo);
+		if (owner != -1) {
+			if (snd_seq_client_info_get_type(cinfo) == SND_SEQ_USER_CLIENT)
+				printf(",pid=%d", owner);
+			else
+				printf(",card=%d", owner);
+		}
+		printf("]\n");
 	}
 	printf("  %3d '%-16s'\n",
 	       snd_seq_port_info_get_port(pinfo),