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dwmstatus.c
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dwmstatus.c
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/*
* dwmstatus - a small program to update dwm window manager status line.
*
* Copyright (c) 2019 Michael Cardell Widerkrantz, mc at the domain hack.org.
*
* https://hack.org/mc/
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/soundcard.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <stdio.h>
#include <xcb/xcb.h>
#include <xcb/xcb_icccm.h>
#include <xcb/xcb_aux.h>
#include <string.h>
int sigcode;
void sigcatch(int sig)
{
sigcode = sig;
}
int main(void)
{
int bat;
int batstate;
int err;
size_t len;
int temp;
char *batstring;
xcb_connection_t *conn;
xcb_screen_t *screen;
char status[80];
int scrno;
char defaultmixer[] = "/dev/mixer";
int mixfd, vol = 0;
time_t rawtime;
struct tm *timeinfo;
char timestr[17];
conn = xcb_connect(NULL, &scrno);
if (!conn)
{
fprintf(stderr, "can't connect to an X server\n");
exit(1);
}
screen = xcb_aux_get_screen(conn, scrno);
if ((mixfd = open(defaultmixer, O_RDWR)) < 0) {
perror("open mixer");
exit(1);
}
if (SIG_ERR == signal(SIGHUP, sigcatch))
{
perror("signal");
exit(1);
}
len = 4;
while (1)
{
if (ioctl(mixfd, SOUND_MIXER_READ_VOLUME, &vol) == -1) {
printf("OSS: Cannot read mixer information\n");
}
err = sysctlbyname("hw.acpi.battery.life", &bat, &len, NULL, 0);
if (err != 0)
{
perror("sysctl");
}
err = sysctlbyname("hw.acpi.battery.state", &batstate, &len, NULL, 0);
if (err != 0)
{
perror("sysctl");
}
switch (batstate)
{
case 0:
batstring = "=";
break;
case 1:
batstring = "-";
break;
case 2:
batstring = "+";
break;
default:
batstring = "U";
break;
}
err = sysctlbyname("dev.cpu.0.temperature", &temp, &len, NULL, 0);
if (err != 0) {
perror("sysctl");
}
// Temperature is measured in deciKelvins, so convert it to
// degrees Celsius.
temp = (temp - 2732) / 10;
time(&rawtime);
timeinfo = localtime(&rawtime);
strftime(timestr, 17, "%F %R", timeinfo);
snprintf(status, 80, "Bat %s%d%% | %d°C | Vol %d%% | %s", batstring, bat, temp, vol & 0x7f, timestr);
xcb_change_property(conn, XCB_PROP_MODE_REPLACE, screen->root, XCB_ATOM_WM_NAME,
XCB_ATOM_STRING, 8, strlen(status), status);
xcb_flush(conn);
// Interrupted if we're sent a SIGHUP
sleep(10);
}
}