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李通洲
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
#include "brightness.h"
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#if __has_include(<sys/backlight.h>)
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#include "common/io/io.h"
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#include <sys/backlight.h>
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#include <sys/ioctl.h>
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#include <sys/fcntl.h>
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#include <unistd.h>
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const char* ffDetectBrightness(FF_MAYBE_UNUSED FFBrightnessOptions* options, FFlist* result)
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{
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// https://man.freebsd.org/cgi/man.cgi?query=backlight&sektion=9
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char path[] = "/dev/backlight/backlight0";
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for (char i = '0'; i <= '9'; ++i)
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{
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path[ARRAY_SIZE(path) - 2] = i;
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FF_AUTO_CLOSE_FD int blfd = open(path, O_RDONLY | O_CLOEXEC);
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if (blfd < 0)
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continue;
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struct backlight_props status;
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if(ioctl(blfd, BACKLIGHTGETSTATUS, &status) < 0)
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continue;
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FFBrightnessResult* brightness = (FFBrightnessResult*) ffListAdd(result);
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ffStrbufInit(&brightness->name);
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brightness->max = BACKLIGHTMAXLEVELS;
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brightness->min = 0;
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brightness->current = status.brightness;
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brightness->builtin = true;
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struct backlight_info info;
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if(ioctl(blfd, BACKLIGHTGETINFO, &info) == 0)
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ffStrbufAppendS(&brightness->name, info.name);
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else
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ffStrbufAppendS(&brightness->name, path + strlen("/dev/backlight/"));
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}
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return NULL;
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}
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#else
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const char* ffDetectBrightness(FF_MAYBE_UNUSED FFBrightnessOptions* options, FF_MAYBE_UNUSED FFlist* result)
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{
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return "Backlight is supported only on FreeBSD 13 and newer";
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}
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#endif
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