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56 lines
909 B
56 lines
909 B
#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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|
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void usage() { |
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fprintf(stderr, "Usage: setpineled [red|green|blue|white] [0-255]\n"); |
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} |
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int main(int argc, char *argv[]) { |
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int brightness; |
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char * color; |
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char * command; |
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char * type; |
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if (argc < 2) { |
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usage(); |
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return 1; |
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} |
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argc--; |
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brightness = atoi(argv[argc--]); |
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if (brightness < 0 || brightness > 255) { |
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usage(); |
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return 1; |
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} |
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color = argv[argc--]; |
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if ( |
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strcmp(color, "red") && |
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strcmp(color, "blue") && |
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strcmp(color, "green") && |
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strcmp(color, "white") |
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) { |
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usage(); |
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return 1; |
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} |
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if (!strcmp(color, "white")) { |
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type = "flash"; |
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} else { |
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type = "indicator"; |
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} |
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command = malloc(80); |
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sprintf( |
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command, |
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"sh -c 'echo %d > /sys/class/leds/%s:%s/brightness'", |
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brightness, color, type |
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); |
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if (setuid(0)) { |
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fprintf(stderr, "setuid(0) failed\n"); |
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} else { |
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return system(command); |
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} |
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}
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