Touchpad switch, for enabling/disabling the touchpad (using xinput)

switch-touchpad.c

#include <stdio.h>
#include <string.h>

/* 
 * `xinput list` shows a list
 * of devices from which you 
 * can get your device's id.
 */
#define	DEVICE	12

int main () {
	FILE *pp;
	int v;
	char line[512],cmd[32];
	sprintf (cmd, "xinput list-props %d",DEVICE);
	pp = popen (cmd,"r");
	while (fgets(line,sizeof(line),pp)) {
		if (strstr (line,"Device Enabled")) {
			sscanf (strchr(line,':')+1,"%d",&v);
			if (v) {
				// Enabled (switch do Disabled)
				sprintf (cmd,"xinput disable %d",DEVICE);
				pclose(popen(cmd,"r"));
			}
			else {
				// Disabled (switch to Enabled)
				sprintf(cmd,"xinput enable %d",DEVICE);
				pclose(popen(cmd,"r"));
			}
			break;
		}
	}
	pclose (pp);
	return 0;

}