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commit ddc7f93ec2f3981cb54c8645b28eaf445da446ee
parent c59324f0c46135fde03915046d4c42a299285e60
Author: willrabbermann <willrabbermann@gmail.com>
Date:   Thu, 20 Apr 2023 11:16:32 -0500

add slstatus-alsa-master-20230420-84a2f11.diff

Diffstat:
A
tools.suckless.org/slstatus/patches/alsa-master/index.md
 | 
18
++++++++++++++++++
A
tools.suckless.org/slstatus/patches/alsa-master/slstatus-alsa-master-20230420-84a2f11.diff
 | 
106
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

2 files changed, 124 insertions(+), 0 deletions(-)
diff --git a/tools.suckless.org/slstatus/patches/alsa-master/index.md b/tools.suckless.org/slstatus/patches/alsa-master/index.md
@@ -0,0 +1,18 @@
+alsa-master
+===========
+
+Description
+-----------
+This patch adds a function to find the audio state (in percentage or as MUTE) 
+of the Master ALSA device using a pipe stream to the command-line mixer for 
+ALSA, amixer. It is simple and does not add additional compilation flags or 
+require use of a /dev/mixer file. The output string will include the % char 
+if the Master interface is on.
+
+Download
+--------
+* [slstatus-alsa-master-20230420-84a2f11.diff](slstatus-alsa-master-20230420-84a2f11.diff)
+
+Authors
+-------
+* William Rabbermann <willrabbermann@gmail.com>
diff --git a/tools.suckless.org/slstatus/patches/alsa-master/slstatus-alsa-master-20230420-84a2f11.diff b/tools.suckless.org/slstatus/patches/alsa-master/slstatus-alsa-master-20230420-84a2f11.diff
@@ -0,0 +1,106 @@
+diff --git a/Makefile b/Makefile
+index 2f93b87..41d5e9a 100644
+--- a/Makefile
++++ b/Makefile
+@@ -6,6 +6,7 @@ include config.mk
+ 
+ REQ = util
+ COM =\
++	components/alsa_master_vol\
+ 	components/battery\
+ 	components/cpu\
+ 	components/datetime\
+diff --git a/components/alsa_master_vol.c b/components/alsa_master_vol.c
+new file mode 100644
+index 0000000..acc283b
+--- /dev/null
++++ b/components/alsa_master_vol.c
+@@ -0,0 +1,64 @@
++/* Created by William Rabbermann */
++#include <stdio.h>
++#include <stdbool.h>
++#include <string.h>
++#include "../util.h"
++
++#define TMP_BUF_SIZE 14
++#define VOL_BUF_SIZE 5
++
++const char *
++alsa_master_vol(void)
++{
++	bool MASTER_IS_MUTED = true;
++	char tmp_buf[TMP_BUF_SIZE];
++	short b;
++	unsigned short i = 0;
++	
++	FILE *fp = popen("amixer get Master | tail -c13", "r");
++	char ch;
++	while ((ch = fgetc(fp)) != EOF && i < TMP_BUF_SIZE)
++		tmp_buf[i++] = ch;
++	tmp_buf[i] = '\0';
++	pclose(fp);
++
++	b = i - 1;
++	while (b >= 0)
++	{
++		if ('[' == tmp_buf[b])
++		{
++			if (tmp_buf[b+1] == 'o' && tmp_buf[b+2] == 'n')
++				MASTER_IS_MUTED = false;
++			b -= 3;
++			break;
++		}
++		b--;
++	}
++	
++	if (MASTER_IS_MUTED) return bprintf("MUTE");
++	else
++	{
++		char vol_buf[VOL_BUF_SIZE];
++		while (b >= 0)
++		{
++			if ('[' == tmp_buf[b])
++				break;	
++			b--;
++		}
++		
++		i = 0;
++		while (i < VOL_BUF_SIZE)
++		{
++			b++;
++			if (']' == tmp_buf[b])
++			{
++				vol_buf[i] = '\0'; 
++				break;
++			}
++			else
++				vol_buf[i++] = tmp_buf[b];
++		}
++		
++		return bprintf("%s", vol_buf);
++	}
++}
+diff --git a/config.def.h b/config.def.h
+index 93a875a..6074441 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -58,6 +58,7 @@ static const char unknown_str[] = "n/a";
+  * uid                 UID of current user             NULL
+  * uptime              system uptime                   NULL
+  * username            username of current user        NULL
++ * alsa_master_vol     ALSA Master device volume       NULL
+  * vol_perc            OSS/ALSA volume in percent      mixer file (/dev/mixer)
+  *                                                     NULL on OpenBSD
+  * wifi_perc           WiFi signal in percent          interface name (wlan0)
+diff --git a/slstatus.h b/slstatus.h
+index b0f2564..415afc1 100644
+--- a/slstatus.h
++++ b/slstatus.h
+@@ -78,6 +78,7 @@ const char *uid(void);
+ 
+ /* volume */
+ const char *vol_perc(const char *card);
++const char *alsa_master_vol(void);
+ 
+ /* wifi */
+ const char *wifi_perc(const char *interface);