Set SSID and PASSPHRASE values from standard input

- SSID is the first line
- PASSPHRASE is the second line

example: echo -e 'MyAccessPoint\nMyPassPhrase' | create_ap wlan0 eth0

create_ap

@@ -25,6 +25,8 @@ usage() {
     echo "Examples:"
     echo "  $(basename $0) wlan0 eth0 MyAccessPoint MyPassPhrase"
     echo "  $(basename $0) -n wlan0 MyAccessPoint MyPassPhrase"
+    echo "  echo -e 'MyAccessPoint\nMyPassPhrase' | $(basename $0) wlan0 eth0"
+    echo "  echo -e 'MyAccessPoint\nMyPassPhrase' | $(basename $0) -n wlan0"
 }
 
 get_macaddr() {
@@ -88,7 +90,14 @@ while :; do
     esac
 done
 
-if [[ $SHARE_INTERNET -eq 1 ]]; then
+if [[ $# -lt 1 ]]; then
+    usage
+    exit 1
+fi
+WIFI_IFACE=$1
+
+if tty -s; then
+    if [[ $SHARE_INTERNET -eq 1 ]]; then
         if [[ $# -ne 3 && $# -ne 4 ]]; then
             usage
             exit 1
@@ -96,15 +105,25 @@ if [[ $SHARE_INTERNET -eq 1 ]]; then
         INTERNET_IFACE=$2
         SSID=$3
         PASSPHRASE=$4
-else
+    else
         if [[ $# -ne 2 && $# -ne 3 ]]; then
             usage
             exit 1
         fi
         SSID=$2
         PASSPHRASE=$3
+    fi
+else
+    if [[ $SHARE_INTERNET -eq 1 ]]; then
+        if [[ $# -ne 2 ]]; then
+            usage
+            exit 1
+        fi
+        INTERNET_IFACE=$2
+    fi
+    read SSID
+    read PASSPHRASE
 fi
-WIFI_IFACE=$1
 
 if [[ $(id -u) -ne 0 ]]; then
     echo "You must run it as root."
@@ -133,7 +152,7 @@ if [[ -n "$PASSPHRASE" ]]; then
     [[ "$WPA_VERSION" == "1+2" || "$WPA_VERSION" == "2+1" ]] && WPA_VERSION=3
     cat << EOF >> $CONFDIR/hostapd.conf
 wpa=${WPA_VERSION}
-wpa_passphrase=$4
+wpa_passphrase=$PASSPHRASE
 wpa_key_mgmt=WPA-PSK
 wpa_pairwise=TKIP
 rsn_pairwise=CCMP