1 files changed, 4 insertions, 6 deletions
diff --git a/src/main.c b/src/main.c
index 408fcb6..df33ffb 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,6 +1,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
+#include <unistd.h>
 
 #include <gpio.h>
 #include <serial.h>
@@ -8,7 +10,7 @@
 int main() {
 
   char *commandList[] = {"AT", "ATI", "AT+COPS?", "AT+COPS=?"},
-       serialFilePath[] = "/dev/serial0", *output = malloc(1);
+       serialFilePath[] = "/dev/serial0", *output;
 
   int serialPort, moduleStatus;
   unsigned long idx;
@@ -17,14 +19,11 @@ int main() {
   moduleStatus = checkPinVal(27);
   if (0 > moduleStatus) {
     printf("Error checkPinVal()\n");
-    close(serialPort);
-    free(output);
     return 1;
   } else if (moduleStatus == 0) {
     printf("Module is off\nPowering on\n");
     if (0 != modemPowerToggle(17)) {
       printf("Error toggling modem power\n");
-      free(output);
       return 1;
     }
     pwrKeyTime = time(NULL);
@@ -32,7 +31,6 @@ int main() {
       sleep(1);
       if (time(NULL) - pwrKeyTime > 10) {
         printf("Modem power on takes longer than 10s\nAborting\n");
-        free(output);
         return 1;
       }
     }
@@ -41,10 +39,10 @@ int main() {
   serialPort = openSerialPort(serialFilePath);
   if (serialPort < 0) {
     printf("Error openSerialPort()\n");
-    free(output);
     return 1;
   }
 
+  output = malloc(1);
   for (idx = 0; idx < sizeof(commandList) / sizeof(*commandList); idx++) {
     if (0 != querySerialPort(&output, serialPort, commandList[idx])) {
       printf("Error querySerialPort()\n");