60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
#include "xbrightness.h"
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void cmd(char *command, char *output) {
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FILE *fp;
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fp = popen(command, "r");
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if (fp == NULL) {
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output[0] = 0;
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} else {
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fgets(output, sizeof(output), fp);
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pclose(fp);
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}
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}
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float current() {
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char out[BUFFER];
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cmd("xrandr --verbose | grep Brightness: | cut -f2 -d\" \"", out); //TODO: Check when 0 screen connected and two or more connected and catch output error
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return strtof(out, NULL); //TODO: Return NULL when convert fail
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}
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void set(float brightness) {
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char screen[BUFFER]; //TODO: Better buffer
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char command[BUFFER] = "xrandr --output ";
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char command2[] = " --brightness ";
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char b[3];
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cmd("xrandr | grep \" connected\" | cut -f1 -d\" \"", screen); //TODO: Check when 0 screen connected and two or more connected and catch output error
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screen[strlen(screen)-1] = 0;
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strcat(command, screen);
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strcat(command, command2);
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gcvt(brightness, 3, b);
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strcat(command, b);
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cmd(command, NULL); //TODO: Catch output error
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}
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int main(int argc, char **argv) {
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if (argc == 1) {
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printf("Current: %.2f\n", current());
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return 0;
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} else if (argc > 2) {
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printf("Too many arguments !\n");
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return 1;
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}
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char *entPrt;
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float b = strtof(argv[1], &entPrt);
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if (*entPrt != '\0') {
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printf("Invalid brightness level !\n");
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return 1;
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} else {
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if (argv[1][0] == '+' ||argv[1][0] == '-') {
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b = current()+b;
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set(b);
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} else {
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set(b);
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}
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printf("Brightness set to %.2f\n", b);
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}
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return 0;
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}
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