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tAdd screen brightness sensor implementation for Linux - spoon - dwm status uti… |
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git clone git://src.adamsgaard.dk/spoon |
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commit 9d849c4df8f4f2a648387b7118c251b35a438ba6 |
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parent 44c65688aa9526fbd1e075a6f5af3a74391722d0 |
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Author: sin <[email protected]> |
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Date: Thu, 15 Mar 2018 14:01:53 +0000 |
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Add screen brightness sensor implementation for Linux |
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In the future we might drop the dependency on xbacklight(1). |
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Diffstat: |
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M brightness.c | 19 ++++++++++++++++++- |
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1 file changed, 18 insertions(+), 1 deletion(-) |
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--- |
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diff --git a/brightness.c b/brightness.c |
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t@@ -30,9 +30,26 @@ brightnessread(void *arg, char *buf, size_t len) |
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return 0; |
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} |
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#elif __linux__ |
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+#include <sys/wait.h> |
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int |
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brightnessread(void *arg, char *buf, size_t len) |
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{ |
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- return -1; |
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+ FILE *fp; |
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+ int brightness; |
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+ |
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+ fp = popen("xbacklight", "r"); |
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+ if (fp == NULL) |
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+ return -1; |
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+ if (fscanf(fp, "%d", &brightness) == EOF) { |
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+ if (ferror(fp)) { |
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+ pclose(fp); |
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+ return -1; |
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+ } |
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+ } |
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+ /* This system does not have a backlight so report it as 100% */ |
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+ if (WEXITSTATUS(pclose(fp)) == 1) |
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+ brightness = 100; |
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+ snprintf(buf, len, "%3d%%", brightness); |
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+ return 0; |
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} |
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#endif |
