From fbe1411c61a328d969c1855ef6ac5b44ce0b0fc9 Mon Sep 17 00:00:00 2001 From: Ana Date: Thu, 24 Sep 2026 09:08:20 -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 2d5b000..42acce4 100644 --- a/main.c +++ b/main.c @@ -6,6 +6,12 @@ int main(int argc, char *argv[]){ int fd; // export fd = open("/sys/class/gpio/chip0/export", O_WRONLY); + if(fd<0) + { + perror("Error opening the GPIO export path"); + return -1; + } + write(fd,"17",2); close(fd); From 114bdbe5d9f6d70b2c3f1e6f10d9966b147053ad Mon Sep 17 00:00:00 2001 From: Ana Date: Thu, 24 Sep 2026 09:16:38 -0600 Subject: [PATCH 2/2] error catcher in all fds --- main.c | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) diff --git a/main.c b/main.c index 42acce4..98d4d69 100644 --- a/main.c +++ b/main.c @@ -6,10 +6,10 @@ int main(int argc, char *argv[]){ int fd; // export fd = open("/sys/class/gpio/chip0/export", O_WRONLY); - if(fd<0) + if(fd<0) { perror("Error opening the GPIO export path"); - return -1; + return -1; } write(fd,"17",2); @@ -17,16 +17,36 @@ 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 export 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 export path"); + return -1; + } + write(fd,"1",1); close(fd); //pin fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY); + if(fd<0) + { + perror("Error opening the GPIO export path"); + return -1; + } + write(fd,"0",1); close(fd); sleep(1); @@ -34,6 +54,12 @@ int main(int argc, char *argv[]){ // unexport fd = open("/sys/class/gpio/chip0/unexport", O_WRONLY); + if(fd<0) + { + perror("Error opening the GPIO export path"); + return -1; + } + write(fd,"17",2); close(fd);