From 1f3a52b99b8f3b88729f78a24b4e6982660469d3 Mon Sep 17 00:00:00 2001
From: Leonardo Mendoza <rogemgarcia@gmail.com>
Date: Thu, 24 Sep 2026 09:07:50 -0600
Subject: [PATCH 1/2] error catcher tested

---
 main.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/main.c b/main.c
index 6a09b71..e5319a4 100644
--- a/main.c
+++ b/main.c
@@ -7,6 +7,12 @@ int main(int argc, char *argv[])
 	int fd;
 	// EXPORT
 	fd = open("/sys/class/gpio/chip0/export", O_WRONLY);
+	if(fd<0)
+	{
+		perror("Error opening GPIO export path");
+		return -1;
+	}
+
 	write(fd, "17", 2);
 	close(fd);
 	// DIRECTION	

From 2b10c808da80cad93fb4966e065e9728fed42412 Mon Sep 17 00:00:00 2001
From: Leonardo Mendoza <rogemgarcia@gmail.com>
Date: Thu, 24 Sep 2026 09:16:28 -0600
Subject: [PATCH 2/2] error catcher in all fds

---
 main.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/main.c b/main.c
index e5319a4..bc276c3 100644
--- a/main.c
+++ b/main.c
@@ -17,26 +17,51 @@ int main(int argc, char *argv[])
 	close(fd);
 	// DIRECTION	
 	fd = open("/sys/class/gpio/chip0/gpio17/direction", O_WRONLY);
+	if(fd<0)
+	{
+		perror("Error opening GPIO path");
+		return -1;
+	}
 	write(fd, "out",3);
 	close(fd);
 	// VALUE	
 	fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY);
+	if(fd<0)
+	{
+		perror("Error opening GPIO path");
+		return -1;
+	}
 	write(fd, "1", 1);
 	close(fd);
 	sleep(1);
 	// Unexport
 	fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY);
+	if(fd<0)
+	{
+		perror("Error opening GPIO path");
+		return -1;
+	}
 	write(fd, "0", 1);
 	close(fd);
 	sleep(1);
 
 
 	fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY);
+	if(fd<0)
+	{
+		perror("Error opening GPIO path");
+		return -1;
+	}
 	write(fd, "1", 1);
 	close(fd);
 	sleep(1);
 
 	fd = open("/sys/class/gpio/chip0/gpio17/unexport", O_WRONLY);
+	if(fd<0)
+	{
+		perror("Error opening GPIO path");
+		return -1;
+	}
 	write(fd, "17", 2);
 	close(fd);