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	tAdd backlight code. - droid4-sys - Droid4 tools
	git clone git://parazyd.org/droid4-sys.git \| https://git.parazyd.org/droid4-sys
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	---
	commit abccab3a85f3d3ae63d56b8b09e58712153c9ef9
	Author: parazyd <[email protected]>
	Date: Wed, 22 May 2019 22:59:57 +0200

	Add backlight code.

	Diffstat:
	A Makefile \| 27 +++++++++++++++++++++++++++
	A arg.h \| 50 +++++++++++++++++++++++++++++…
	A backlight.c \| 62 +++++++++++++++++++++++++++++…
	A config.mk \| 4 ++++

	4 files changed, 143 insertions(+), 0 deletions(-)
	---
	diff --git a/Makefile b/Makefile
	t@@ -0,0 +1,27 @@
	+.POSIX:
	+
	+include config.mk
	+
	+BIN = backlight
	+OBJ = $(BIN:=.o)
	+
	+all: $(BIN)
	+
	+$(OBJ): config.mk
	+
	+$(BIN): $(OBJ)
	+ $(CC) $(OBJ) $(LDFLAGS) -o $@
	+
	+clean:
	+ rm -f $(BIN) $(OBJ)
	+
	+install: all
	+ mkdir -p $(DESTDIR)$(PREFIX)/bin
	+ cp -f $(BIN) $(DESTDIR)$(PREFIX)/bin
	+ chmod 4711 $(DESTDIR)$(PREFIX)/bin/$(BIN)
	+
	+uninstall:
	+ rm -rf $(DESTDIR)$(PREFIX)/bin/$(BIN)
	+
	+.c.o:
	+ $(CC) $(CFLAGS) -c $<
	diff --git a/arg.h b/arg.h
	t@@ -0,0 +1,50 @@
	+/*
	+ * Copy me if you can.
	+ * by 20h
	+ */
	+
	+#ifndef ARG_H__
	+#define ARG_H__
	+
	+extern char *argv0;
	+
	+/* use main(int argc, char argv[]) /
	+#define ARGBEGIN for (argv0 = *argv, argv++, argc--;\
	+ argv[0] && argv[0][0] == '-'\
	+ && argv[0][1];\
	+ argc--, argv++) {\
	+ char argc_;\
	+ char **argv_;\
	+ int brk_;\
	+ if (argv[0][1] == '-' && argv[0][2] == '\0') {\
	+ argv++;\
	+ argc--;\
	+ break;\
	+ }\
	+ int i_;\
	+ for (i_ = 1, brk_ = 0, argv_ = argv;\
	+ argv[0][i_] && !brk_;\
	+ i_++) {\
	+ if (argv_ != argv)\
	+ break;\
	+ argc_ = argv[0][i_];\
	+ switch (argc_)
	+
	+#define ARGEND }\
	+ }
	+
	+#define ARGC() argc_
	+
	+#define EARGF(x) ((argv[0][i_+1] == '\0' && argv[1] == NULL)?\
	+ ((x), abort(), (char *)0) :\
	+ (brk_ = 1, (argv[0][i_+1] != '\0')?\
	+ (&argv[0][i_+1]) :\
	+ (argc--, argv++, argv[0])))
	+
	+#define ARGF() ((argv[0][i_+1] == '\0' && argv[1] == NULL)?\
	+ (char *)0 :\
	+ (brk_ = 1, (argv[0][i_+1] != '\0')?\
	+ (&argv[0][i_+1]) :\
	+ (argc--, argv++, argv[0])))
	+
	+#endif
	diff --git a/backlight.c b/backlight.c
	t@@ -0,0 +1,62 @@
	+#include <stdio.h>
	+#include <stdlib.h>
	+#include <string.h>
	+
	+#include "arg.h"
	+
	+char *argv0;
	+
	+void usage(void) {
	+ fprintf(stderr, "usage: %s [-l\|-k] [on\|off]\n", argv0);
	+ exit(1);
	+}
	+
	+int main(int argc, char *argv[]) {
	+ const char *kbd_backlight = "/sys/class/leds/kbd_backlight/brightness";
	+ const char *lcd_backlight = "/sys/class/backlight/lcd/brightness";
	+ int iskbd = 0, islcd = 0, state = -1;
	+ char *act = NULL;
	+ FILE *fd = NULL;
	+
	+ ARGBEGIN {
	+ case 'l':
	+ islcd = 1;
	+ act = EARGF(usage());
	+ break;
	+ case 'k':
	+ iskbd = 1;
	+ act = EARGF(usage());
	+ break;
	+ default:
	+ usage();
	+ } ARGEND;
	+
	+ if ((islcd && iskbd) \|\| (!islcd && !iskbd))
	+ usage();
	+
	+ if (!strcmp(act, "on"))
	+ state = 1;
	+ else if (!strcmp(act, "off"))
	+ state = 0;
	+ if (state < 0)
	+ usage();
	+
	+ if (islcd)
	+ fd = fopen(lcd_backlight, "w");
	+ if (iskbd)
	+ fd = fopen(kbd_backlight, "w");
	+
	+ if (fd == NULL) {
	+ fprintf(stderr, "Unable to open file for writing.\n");
	+ return 1;
	+ }
	+
	+ if (islcd)
	+ fprintf(fd, "%d", state==0 ? 0 : 200);
	+ if (iskbd)
	+ fprintf(fd, "%d", state==0 ? 0 : 255);
	+
	+ fclose(fd);
	+
	+ return 0;
	+}
	diff --git a/config.mk b/config.mk
	t@@ -0,0 +1,4 @@
	+PREFIX = /usr/local
	+
	+CFLAGS = -O2 -Wall -Werror -pedantic
	+LDFLAGS = -static -s