sbar

commit ee925c823cb1623baa256a70dfba469214120c47
Author: ssnf@ssnf.xyz <ssnf@ssnf.xyz>
Date:   Thu, 25 Feb 2021 18:51:56 +0000

Initial commit

Diffstat:
A
Makefile
 | 
15
+++++++++++++++
A
sbar.c
 | 
34
++++++++++++++++++++++++++++++++++
A
sbar.h
 | 
61
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
unix.c
 | 
162
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

4 files changed, 272 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile
@@ -0,0 +1,15 @@
+DESTDIR=~/.local
+LIBS=-lX11
+OPTS=-std=c99 -Wno-parentheses -Wpedantic -Wall -funsigned-char -D_POSIX_C_SOURCE=199309L
+
+SRC = sbar.c unix.c
+sbar:
+	${CC} -o $@ ${LIBS} ${OPTS} *.c
+clean:
+	rm -f sbar ${OBJ}
+install:
+	mkdir -p ${DESTDIR}/bin
+	chmod +x sbar
+	cp -f sbar ${DESTDIR}/bin
+uninstall:
+	rm ${DESTIDIR}/bin/sbar
diff --git a/sbar.c b/sbar.c
@@ -0,0 +1,34 @@
+#include "sbar.h"
+
+Partition part[] = {
+	{.path = "/"},
+	{.path = "/home"}
+};
+Bat		bat;
+Ram		ram;
+Date	date;
+Title	title;
+
+void
+update()
+{
+	title.update = 0;
+	snprintf(title.text, 256, "%s %s %s %s %s", part[0].text, part[1].text, ram.text, date.text, bat.text);
+	Titleset();
+}
+
+int
+main()
+{
+	Partinit();
+	Raminit();
+	Titleinit();
+	for (;;) {
+		Partchk();
+		Ramchk();
+		Datechk();
+		Batchk();
+		if (title.update) update();
+		wait(.016);
+	}
+}
diff --git a/sbar.h b/sbar.h
@@ -0,0 +1,61 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+
+#define LENGTH(a) (sizeof(a)/sizeof(a[0]))
+
+typedef unsigned char		uchar;
+typedef unsigned int		uint;
+typedef unsigned long		ulong;
+typedef struct Title		Title;
+typedef struct Partition	Partition;
+typedef struct Ram			Ram;
+typedef struct Date			Date;
+typedef struct Bat			Bat;
+
+struct Title {
+	char	text[256];
+	uchar	update;
+};
+void	Titleinit();
+void	Titleset();
+
+struct Partition {
+	char*	path;
+	char	text[32];
+	ulong	free;
+	float	size_f;
+};
+void	Partinit();
+void	Partchk();
+
+struct Ram {
+	char	text[24];
+	ulong	free;
+	ulong	size;
+	uchar	unit;
+	float	size_f;
+};
+void	Raminit();
+void	Ramchk();
+
+struct Date {
+	char	text[16];
+	uint	s;
+};
+void	Datechk();
+
+struct Bat {
+	char	text[8];
+	ulong	c;
+};
+void	Batchk();
+
+void	wait(double);
+
+extern Title		title;
+extern Partition	part[2];
+extern Ram			ram;
+extern Date			date;
+extern Bat			bat;
diff --git a/unix.c b/unix.c
@@ -0,0 +1,162 @@
+#include "sbar.h"
+
+#include <time.h>
+#include <unistd.h>
+#include <X11/Xlib.h>
+#include <sys/statfs.h>
+
+void wait(double);
+void Partinit();
+void Partchk();
+void Raminit();
+void Ramchk();
+void Datechk();
+void Batchk();
+
+void
+wait(double t)
+{
+	static struct timespec	ts;
+	static double			lastwait;
+	ulong					i;
+
+	if (t != lastwait) {
+		lastwait = t;
+		for (i = 0; t >= 1; --t, ++i);
+		ts.tv_sec  = i;
+		ts.tv_nsec = t * 1000000000;
+	}
+	nanosleep(&ts, NULL);
+}
+
+void
+Partinit()
+{
+	struct statfs	stat;
+	uint			i, size;
+
+	for (i = 0; i < LENGTH(part); ++i) {
+		statfs(part[i].path, &stat);
+		size = (stat.f_blocks * stat.f_bsize) >> 20;
+		part[i].size_f = (float)size / 1024.0f;
+	}
+}
+
+void
+Partchk()
+{
+	struct statfs	stat;
+	uint			i, free;
+
+	for (i = 0; i < LENGTH(part); ++i) {
+		statfs(part[i].path, &stat);
+		free = (stat.f_bfree * stat.f_bsize) >> 23;
+		if (free != part[i].free) {
+			part[i].free = free;
+			++title.update;
+			snprintf(part[i].text, 25, "%s:(%2.2fGB/%2.2fGB)", part[i].path, part[i].size_f - ((float)free / 128.0f), part[i].size_f);
+		}
+	}
+}
+
+void
+Raminit()
+{
+	FILE*	meminfo;
+	char	buf[32];
+	ulong	size;
+
+	if (!(meminfo = fopen("/proc/meminfo", "r"))) return;
+	fread(buf, 32, 1, meminfo);
+	fclose(meminfo);
+	sscanf(buf, "MemTotal: %lu", &size);
+	ram.size = size;
+	ram.unit = 'M';
+	if (size > 1024*1024) {
+		ram.unit = 'G';
+		size >>= 10;
+	}
+	ram.size_f = size/1024.0f;
+}
+
+void
+Ramchk()
+{
+	FILE*	meminfo;
+	char	buf[1024];
+	ulong	i, free;
+	float	used_f;
+	uchar	unit;
+
+	if (!(meminfo = fopen("/proc/meminfo", "r"))) return;
+	fread(buf, 1024, 1, meminfo);
+	fclose(meminfo);
+	free = 0;
+	sscanf(strstr(buf, "MemFree"), "MemFree: %lu", &free);
+	if (ram.unit == 'M' && free >> 3 == ram.free >> 3 ||
+		ram.unit == 'G' && free >> 13 == ram.free >> 13) return;
+	ram.free = free;
+	sscanf(strstr(buf, "Buffers"), "Buffers: %lu", &i);
+	free += i;
+	sscanf(strstr(buf, "Cached"), "Cached: %lu", &i);
+	free += i;
+	sscanf(strstr(buf, "Shmem"), "Shmem: %lu", &i);
+	free -= i;
+	sscanf(strstr(buf, "SReclaimable"), "SReclaimable: %lu", &i);
+	free += i;
+	unit = 'M';
+	used_f = (ram.size - free) / 1024.0f;
+	if (used_f > 1024) {
+		unit = 'G';
+		used_f /= 1024.0f;
+	}
+	++title.update;
+	snprintf(ram.text, 24, "R(%.02f%cB/%.02f%cB)", used_f, unit, ram.size_f, ram.unit);
+}
+
+void
+Datechk()
+{
+	FILE*	f;
+	uint	h, m, s, d, M;
+
+	if (!(f = fopen("/sys/class/rtc/rtc0/time", "r"))) return;
+	fscanf(f, "%u:%u:%u", &h, &m, &s);
+	fclose(f);
+	if (s == date.s) return;
+	if (h > 12) h -= 12;
+	date.s = s;
+	if (!(f = fopen("/sys/class/rtc/rtc0/date", "r"))) return;
+	fscanf(f, "%*u-%u-%u", &M, &d);
+	fclose(f);
+	++title.update;
+	snprintf(date.text, 16, "%u/%u %u:%02u:%02u", M, d, h, m, s);
+}
+
+void
+Batchk()
+{
+	FILE*	f;
+	uint	c;
+
+	if (!(f = fopen("/sys/class/power_supply/BAT0/capacity", "r"))) return;
+	fscanf(f, "%u", &c);
+	fclose(f);
+	if (c == bat.c) return;
+	bat.c = c;
+	snprintf(bat.text, 19, "B(%u%%)", c);
+}
+
+static Display*	display;
+void
+Titleinit()
+{
+	display = XOpenDisplay(NULL);
+}
+
+void
+Titleset()
+{
+	XStoreName(display, DefaultRootWindow(display), title.text);
+	XFlush(display);
+}