From 40906b472d018d61431fb5ae76019838c81796a2 Mon Sep 17 00:00:00 2001
From: Ignacio Abundez <abundezignacio@gmail.com>
Date: Thu, 24 Sep 2026 09:16:30 -0600
Subject: [PATCH] error catcher in all fds

---
 main.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/main.c b/main.c
index e794e4e..cd11ae2 100644
--- a/main.c
+++ b/main.c
@@ -7,7 +7,7 @@ int main (int argc, char *argv[]){
 	// export 
 	fd = open("/sys/class/gpio/chip0/export", O_WRONLY);
 	if (fd < 0){
-		perror("Error opening the GPIO export path");
+		perror("Error opening the GPIO path");
 		return -1;
 	}
 	write(fd,"17", 2);
@@ -15,23 +15,39 @@ int main (int argc, char *argv[]){
 	
 	//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);