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slstatus-backlight-4bd78c9.diff (2788B)

      1 diff --git a/Makefile b/Makefile
      2 index 3be46cc..93dc2c5 100644
      3 --- a/Makefile
      4 +++ b/Makefile
      5 @@ -6,6 +6,7 @@ include config.mk
      6  
      7  REQ = util
      8  COM =\
      9 +	components/backlight\
     10  	components/battery\
     11  	components/cpu\
     12  	components/datetime\
     13 diff --git a/components/backlight.c b/components/backlight.c
     14 new file mode 100644
     15 index 0000000..74f4c08
     16 --- /dev/null
     17 +++ b/components/backlight.c
     18 @@ -0,0 +1,59 @@
     19 +/* See LICENSE file for copyright and license details. */
     20 +
     21 +#include <stddef.h>
     22 +
     23 +#include "../util.h"
     24 +
     25 +#if defined(__linux__)
     26 +	#include <limits.h>
     27 +
     28 +	#define BRIGHTNESS_MAX "/sys/class/backlight/%s/max_brightness"
     29 +	#define BRIGHTNESS_CUR "/sys/class/backlight/%s/brightness"
     30 +
     31 +	const char *
     32 +	backlight_perc(const char *card)
     33 +	{
     34 +		char path[PATH_MAX];
     35 +		int max, cur;
     36 +
     37 +		if (esnprintf(path, sizeof (path), BRIGHTNESS_MAX, card) < 0 ||
     38 +			pscanf(path, "%d", &max) != 1) {
     39 +			return NULL;
     40 +		}
     41 +
     42 +		if (esnprintf(path, sizeof (path), BRIGHTNESS_CUR, card) < 0 ||
     43 +			pscanf(path, "%d", &cur) != 1) {
     44 +			return NULL;
     45 +		}
     46 +
     47 +		if (max == 0) {
     48 +			return NULL;
     49 +		}
     50 +
     51 +		return bprintf("%d%%", cur * 100 / max);
     52 +	}
     53 +#elif defined(__OpenBSD__)
     54 +	#include <fcntl.h>
     55 +	#include <sys/ioctl.h>
     56 +	#include <sys/time.h>
     57 +	#include <dev/wscons/wsconsio.h>
     58 +
     59 +	const char *
     60 +	backlight_perc(const char *unused)
     61 +	{
     62 +		int fd, err;
     63 +		struct wsdisplay_param wsd_param = {
     64 +			.param = WSDISPLAYIO_PARAM_BRIGHTNESS
     65 +		};
     66 +
     67 +		if ((fd = open("/dev/ttyC0", O_RDONLY)) < 0) {
     68 +			warn("could not open /dev/ttyC0");
     69 +			return NULL;
     70 +		}
     71 +		if ((err = ioctl(fd, WSDISPLAYIO_GETPARAM, &wsd_param)) < 0) {
     72 +			warn("ioctl 'WSDISPLAYIO_GETPARAM' failed");
     73 +			return NULL;
     74 +		}
     75 +		return bprintf("%d", wsd_param.curval * 100 / wsd_param.max);
     76 +	}
     77 +#endif
     78 diff --git a/config.def.h b/config.def.h
     79 index 5f6c114..69c5d50 100644
     80 --- a/config.def.h
     81 +++ b/config.def.h
     82 @@ -12,6 +12,9 @@ static const char unknown_str[] = "n/a";
     83  /*
     84   * function            description                     argument (example)
     85   *
     86 + * backlight_perc      backlight percentage            device name
     87 + *                                                     (intel_backlight)
     88 + *                                                     NULL on OpenBSD
     89   * battery_perc        battery percentage              battery name (BAT0)
     90   *                                                     NULL on OpenBSD/FreeBSD
     91   * battery_state       battery charging state          battery name (BAT0)
     92 diff --git a/slstatus.h b/slstatus.h
     93 index f3b4979..e1759a0 100644
     94 --- a/slstatus.h
     95 +++ b/slstatus.h
     96 @@ -1,5 +1,8 @@
     97  /* See LICENSE file for copyright and license details. */
     98  
     99 +/* backlight */
    100 +const char *backlight_perc(const char *);
    101 +
    102  /* battery */
    103  const char *battery_perc(const char *);
    104  const char *battery_state(const char *);