CC-3573: Use posix_geteuid instead of "whoami" to detect who is running PHP script

-done

install_minimal/airtime-install

@@ -2,7 +2,7 @@
 #-e Causes bash script to exit if any of the installers
 #return with a non-zero return value.
 
-if [ `whoami` != 'root' ]; then
+if [[ $EUID -ne 0 ]]; then
     echo "Please run as root user."
     exit 1
 fi

install_minimal/airtime-uninstall

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 #Check if root user
-if [ `whoami` != 'root' ]; then
+if [[ $EUID -ne 0 ]]; then
     echo "Please run as root user."
     exit 1
 fi

install_minimal/include/AirtimeInstall.php

@@ -33,7 +33,7 @@ class AirtimeInstall
     public static function ExitIfNotRoot()
     {
         // Need to check that we are superuser before running this.
-        if(exec("whoami") != "root"){
+        if(posix_geteuid() != 0){
             echo "Must be root user.\n";
             exit(1);
         }

install_minimal/include/airtime-copy-files.sh

@@ -2,7 +2,7 @@
 #-e Causes bash script to exit if any of the installers
 #return with a non-zero return value.
 
-if [ `whoami` != 'root' ]; then
+if [[ $EUID -ne 0 ]]; then
     echo "Please run as root user."
     exit 1
 fi

install_minimal/include/airtime-initialize.sh

@@ -2,7 +2,7 @@
 #-e Causes bash script to exit if any of the installers
 #return with a non-zero return value.
 
-if [ `whoami` != 'root' ]; then
+if [[ $EUID -ne 0 ]]; then
     echo "Please run as root user."
     exit 1
 fi

install_minimal/include/airtime-remove-files.sh

@@ -2,7 +2,7 @@
 #-e Causes bash script to exit if any of the installers
 #return with a non-zero return value.
 
-if [ `whoami` != 'root' ]; then
+if [[ $EUID -ne 0 ]]; then
     echo "Please run as root user."
     exit 1
 fi

install_minimal/include/airtime-uninitialize.sh

@@ -2,7 +2,7 @@
 #-e Causes bash script to exit if any of the installers
 #return with a non-zero return value.
 
-if [ `whoami` != 'root' ]; then
+if [[ $EUID -ne 0 ]]; then
     echo "Please run as root user."
     exit 1
 fi

install_minimal/include/airtime-upgrade.php

@@ -11,7 +11,7 @@ require_once(__DIR__.'/airtime-constants.php');
 require_once(dirname(__FILE__).'/AirtimeIni.php');
 require_once(dirname(__FILE__).'/AirtimeInstall.php');
 
-if(exec("whoami") != "root"){
+if(posix_geteuid() != 0){
     echo "Must be root user.\n";
     exit(1);
 }