error catcher tested

.gitignore

@@ -1 +1,2 @@
 hello
+gpio

main.c

@@ -6,6 +6,10 @@ int main(int argc, char *argv[]){
 	int fd;
 	//export
 	fd= open("/sys/class/gpio/chip0/export",O_WRONLY);
+	if (fd<0){
+		perror("Error opening the GPIO export path");
+		return -1;
+	}
 	write(fd,"17",2);
 	close(fd);
 	//pin direction