From 78b09cc4b4863a1bdc4c1d2d17bdad48cbf1a43c Mon Sep 17 00:00:00 2001
From: billz <billzimmerman@gmail.com>
Date: Fri, 13 Dec 2019 16:54:01 +0000
Subject: [PATCH] Initialize wpa_supplicant, create if absent. Resolves #452

---
 installers/common.sh | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/installers/common.sh b/installers/common.sh
index 9cfedc31..fc12560f 100755
--- a/installers/common.sh
+++ b/installers/common.sh
@@ -209,6 +209,11 @@ function check_for_old_configs() {
         sudo cp /etc/rc.local "$raspap_dir/backups/rc.local.`date +%F-%R`"
         sudo ln -sf "$raspap_dir/backups/rc.local.`date +%F-%R`" "$raspap_dir/backups/rc.local"
     fi
+
+    if [ -f /etc/wpa_supplicant/wpa_supplicant.conf ]; then
+        sudo cp /etc/wpa_supplicant/wpa_supplicant.conf "$raspap_dir/backups/wpa_supplicant.conf.`date +%F-%R`"
+        sudo ln -sf "$raspap_dir/backups/wpa_supplicant.conf.`date +%F-%R`" "$raspap_dir/backups/wpa_supplicant.conf"
+    fi
 }
 
 # Move configuration file to the correct location
@@ -343,9 +348,26 @@ function patch_system_files() {
         install_log "Sudoers file already patched"
     fi
 
-    # add symlink to prevent wpa_cli cmds from breaking with multiple wlan interfaces
+    # Add symlink to prevent wpa_cli cmds from breaking with multiple wlan interfaces
     install_log "Symlinked wpa_supplicant hooks for multiple wlan interfaces"
-    sudo ln -s /usr/share/dhcpcd/hooks/10-wpa_supplicant /etc/dhcp/dhclient-enter-hooks.d/
+    if [ ! -f /usr/share/dhcpcd/hooks/10-wpa_supplicant ]; then
+        sudo ln -s /usr/share/dhcpcd/hooks/10-wpa_supplicant /etc/dhcp/dhclient-enter-hooks.d/
+    fi
+
+    # Add ctrl_interface and group to wpa_supplicant, create if absent
+    install_log "Patching wpa_supplicant.conf"
+    line="ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev"
+    if [ ! -f /etc/wpa_supplicant/wpa_supplicant.conf ]; then
+        echo "Creating wpa_supplicant.conf"
+        sudo touch /etc/wpa_supplicant/wpa_supplicant.conf || install_error "Unable to create wpa_supplicant.conf"
+        echo $line | sudo tee /etc/wpa_supplicant/wpa_supplicant.conf || install_error "Unable to write to wpa_supplicant.conf"
+    fi
+    if grep "$line" /etc/wpa_supplicant/wpa_supplicant.conf > /dev/null; then
+        echo "ctrl_interface is OK"
+    else
+        sudo sed -i "1 i\$line" /etc/wpa_supplicant/wpa_supplicant.conf || install_error "Unable to write to wpa_supplicant.conf"
+        echo "Adding line $line"
+    fi
 
     # Unmask and enable hostapd.service
     install_log "Unmasking and enabling hostapd service"