Merge branch 'error-catching'

.gitignore

@@ -0,0 +1 @@
+hello

Readme.md

@@ -4,3 +4,8 @@ How to compile
 ```bash
 gcc main.c -o hello
 ```
+
+
+# Issues
+
+- [] Error catcher

main.c

@@ -6,35 +6,52 @@ 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 path");
+		return -1;
+	}
 	write(fd,"17", 2);
 	close(fd);
 	
 	//pin direction
 	fd = open("/sys/class/gpio/chip0/gpio17/direction", O_WRONLY);
+	if (fd < 0){
+		perror("Error opening the GPIO path");
+		return -1;
+	}
 	write(fd,"out", 3);
 	close(fd);
 
 
 	//pin value
 	fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY);
+	if (fd < 0){
+		perror("Error opening the GPIO path");
+		return -1;
+	}
 	write(fd,"1", 1);
 	close(fd);
 	sleep(1);
 	
 	fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY);
+	if (fd < 0){
+		perror("Error opening the GPIO path");
+		return -1;
+	}
 	write(fd,"0", 1);
 	close(fd);
 	sleep(1);
 	
 	//unexport 
 	fd = open("/sys/class/gpio/chip0/unexport", O_WRONLY);
+	if (fd < 0){
+		perror("Error opening the GPIO path");
+		return -1;
+	}
 	write(fd,"17", 2);
 	close(fd);
 	
 
-
-
-
 	printf("Hello from Raspberry Pi!\n");
 	printf("Number of arguments: %d\n",argc);
 	printf("Program is reciving: %s\n",argv[0]);