From a5d0616a532bc98b5ee99afc396752ac80b698ed Mon Sep 17 00:00:00 2001
From: Edgar <m19120111@morelia.tecnm.mx>
Date: Thu, 24 Sep 2026 09:08:46 -0600
Subject: [PATCH 1/2] error catcher tested

---
 .gitignore |   1 +
 gpio       | Bin 69328 -> 69364 bytes
 main.c     |   4 ++++
 3 files changed, 5 insertions(+)

diff --git a/.gitignore b/.gitignore
index ce01362..f8d8578 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 hello
+gpio
diff --git a/gpio b/gpio
index 01258a60170071a73f890b1ce4531c960ec0a38a..99de1a1630db28b91a7f32e2d42bf09ac9bc8679 100755
GIT binary patch
delta 2549
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zHHHUBAhwypt%Ta5D25<GX@mz7c~Aq23C8#$7%OEBU>|ByjR}?YJ2P|Z*e7pudhU16
zch5a@=G-%TvtJ+Y*Skx?8+AdoM6{!4PH`j^CQ5|`q-Xh-U<N1??m0Wts1-zYJ=fPp
z(pXA^kPh2(#g@daHRq?_++OqHx#uT-ZuzXeEVcXa6}wN=lr1==!KV(v1}gjW6*Io?
z<o?SGw--JdJ(#fXigK~d4r`Tmqh{KNG_(3y(9|fvWT^tsj2BJ8Gwn7lY4>T-V5YgF
zqrJm^U)$P6f&%~f(|`!88m)vjJs*j-wiv;()>|9uIUXc%Uh?d<uodEoqtHc&-(-zv
zNwCIqm9RF5X0eVCS*&r;{BoXP;{w)jxrlWhQ5EYDQK+Hfey!afDAvm-1li+(>Xl!;
zeJA<#kvsatl`MJliHHBr$9?lr-~6s`e*2+4SAQn<eJ=Og1IUhtg6iyMJ!x#ftkyoP
z&ofd8AZ34|KjqEt>kCE7E;N!|DKU^egIyuY&xWc>vqbAh@F-`iu>LOAscLuxxqF~l
zgCkaaARD66>}iKzn*9h`n1drxaF2UF0^pIyJK^!z5A#N8AbZ5)3Gjx^fiA~kw@2({
zA`Oll@HSk*hBtj1hD<krgC75o$KUPo`@rw?_#AM?<L~wO`=R%OvkTfZOS2g&9>{J2
zNbr+a+1Y?O_{(b`ylhtllSTt(>+E&G8Px~#5EkSM$Ti3qWE@fw5;O~9K^h=CAcr8Q
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z%~uEoNHaYBD3@!m!+H*y&l!WZ0>T#I>Ru78xB=7u5$vS&v8TnEE)Io9z`6899HNVH
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zraR)q0Wh|p`4zEUg-5V5u9qKcBDw6O&utRR3Txi6mwk4Azg#Eoh&YM7Cu0GTj9;6w
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zHEqFiqYtkJPRXA@i>nGQ&|>sD(_}1&m*#B6Kfcnv>~wN>5uE~7gY6f5*aH3>Smivf
z710e~t~~xwb6ws7_D6F9SXFufN^V%t<oQkjV^cQ#1?+!39iL0icOTZ-K^R!sIe<c7
zH8|k;z^aA|v<NMnVyCT_X6A{EFx{_y!>Xp$%U5iwd9wD>;gI-M$V^0R6OHnRh)9OH
zCE+tm7v$dzxg(u}yFGG#J|H(F3-6&wz5r-&KdO_v^Tj-aTT!cg2h%XO&<sdv`6ZJ$
zva9kwTiotQbVL?L;f<5D5n1e(ivbOOb@$}vD2SZiF*NH9@+d4p_t%yDG%Dr>xuTlF
z@<*P#KdPh_6Yq(7`9Ta$_{G-C>oJ7ne81)IG4VKx`mt$HZ^&g(#z{1gZn<+BIEzr`
U&&gw$mbAd}WRWAQNP;u|0U+bssQ>@~

delta 2449
zcmai0U2GIp6uxJEwzJ#ab*3z3(-yW{YDA&w0!^$*#RV}bNuyPHF`y9wD6xj0U_wIU
z7Js5f3~Z)&S1sw1KrmWCgoGbO-%JD(;f3%}wNNL3#H5KzAU3SunVH*+Pu}L{obTN4
z+<Wesb5HlL1IEPz#=dO4-5}8=gy=2j=Oiv#LR_>6v%F$`Y#M0VDu32w7D$M$@()iX
z#$g%<Vcc@tXnkhM^)IxxvAbut51xJf%*W?#>%yAbZiSXKwdOVKX<))Z%)7nTc6N;n
zo?iIMZ1)DW)AMdh>!gKlhn91?K~SRs%Kh#KTF&j$Y<Emcy5DK*OC<Ejp9Y<TCYFI~
zhmM)en^OYz-q3ck{9#Oh^Gvv2z}jrwAqm-th-{XKF2fR$W?9CCXkn=f(aIA1c9tbm
zhy|=*%S9~faI0d+&Ba38vWCvxFeW-YV`9`xPwbtrroQ$1rs4Vh-fOw@d#?3Of8!~A
zWkm0Z=v@(gQABSKb$3e7yU!U*Q<rPCTfbvg|G_77KQeOWyU+^mIb*(AL|{eNGnR(h
zTyr56-Bo6;w17svBk;0By{ENSCtI9R&l1hv=f17kI|fO1b<zUwK*-a<o3;bq!H{=2
z<lPXXo*VKAyz!7HL*6IM6V=Ig0)A=oG#nUk0POH(=<t5%us3wr6*x=|gU`AOcp&7L
zLjIeOJHUAj(zctu0qC2dX9~?8vf=4=_3B#KHt>4EeIwRn_5iMN55{J76zWLyW3I*=
z#2msrg!w7v80L?dcQ7+3a_kj5kuG#@+_`nj_8nYGiywC9S=kf6)NLYKed3Aug}>dQ
z_>Q?*lf)F>5x%=$mPyEpP69P4hTV=@r&G~LpnSv~B9VX`a9^$E9_Mn+U^<v{F#F-d
zdM_kD1%5lTLV2%N+meO72Fd44K^i)_+v1CdDf!?bEdAevmuT7l2puVL7(8_Ui6U5p
z7hu#n1~&Gk?gx$cF@sV27#tuE-48JcJivHF7<_pix_?>WM;73E7S9UqI)Q<6g)GGs
z=9~#JGK14T=BC6$7x(${$_x%#z_=y9B6<?d1h3cUHTtqB9gQAar;g(ez!AI{9<Q+4
zUSNA(=N1<XM{od)TOs-L@VW|5V3l#VJg!l0`OA@Qb1*Bcg~z@XS?6!7(j<^3#>3Ll
zDd$wf>?w0aE{C~P4RgYWa`RJ|fZ2ObWcU6ER;Q0e)|r1gg1J#DtoXl0)^W)dq9;tQ
z5RLwUT=Kz4ij7bdRvTpSEY$igC`Fk!sMF!sqRdC3WaT=TsVK_^<?{SMgAv@SCBo)Z
zZ;+QjTT-0)LP0VV=43EU6$tnG2_MTgla}TAjRd3K=bemTKPhszNzLZlV0FubCITvk
zx3=*_UxImM1g`=v%B!F`s)8G|l-R^H>BR8SR6*Lv**=)n;O9LW!L7hYfmMzjtx<dp
z%$3IfM!62p14mDP4_H-p14`^CU^RIEUrD_1ABXE8M6dHFFz0tCByVshvd#e*{7*a_
zykQ1d)og>75KX7%*3oV{b<84<q?@3Pv{K$pP%h35hIgyVd_5rdmkOK*<fR17l56WJ
z8Rs5j;I(GtHc(7%F<H64p5~j}U3%p?sB!Ly{UG(qn@r-vD>9YDO3>_t7?Mw?uw`Eo
zTXHhmk*%$AT@t7ACmBZ9wWN~-WrQi5&k@+V<Z)19!H*qzIZ16XE}1KqyazoV{Kml#
zfxxvVMSG|_IB7gZNs~WoxBMf8KscdAbOs~1+oCktsO3k~^nkeu=FY%82(wuM9+KrW
T?wCcHKP1mUr4{n$G|l-J1j^HG

diff --git a/main.c b/main.c
index d6ea71e..7b9b227 100644
--- a/main.c
+++ b/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

From 70c7513405cb025c0f1d14d2b467b90a80a56640 Mon Sep 17 00:00:00 2001
From: Edgar <m19120111@morelia.tecnm.mx>
Date: Thu, 24 Sep 2026 09:17:28 -0600
Subject: [PATCH 2/2] error catcher in all fds

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

diff --git a/main.c b/main.c
index 7b9b227..75fcaa7 100644
--- a/main.c
+++ b/main.c
@@ -7,29 +7,45 @@ 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);
 	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);
 	//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,"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);