From 7460a97b0b9e549f012b030912e2ccf22f569825 Mon Sep 17 00:00:00 2001
From: Peter Palfrader <peter@palfrader.org>
Date: Tue, 14 Jul 2020 09:47:00 +0200
Subject: Add qr wifi generation

---
 qr | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/qr b/qr
index 287c852..f736178 100755
--- a/qr
+++ b/qr
@@ -27,18 +27,21 @@ usage()
 {
 cat << EOF
 usage: $0 -m <MSG>
+       $0 -w <essid> <password>
        $0 [options] [<file>]
 
 OPTIONS:
    -m <MSG>  Use MSG instead of reading input from file/stdin.
    -M        Add a/Include the trailing newline for single-line data.
+   -w <essid> <password>  Create a wifi qr code.
 EOF
 }
 
 msg=""
 have_msg=0
 multi_line=0
-while getopts "hm:M" OPTION
+wifi=0
+while getopts "hm:Mw" OPTION
 do
     case $OPTION in
         h)
@@ -52,6 +55,9 @@ do
             have_msg=1
             msg="$OPTARG"
             ;;
+        w)
+            wifi=1
+            ;;
         *)
             usage >&2
             exit 1
@@ -65,7 +71,15 @@ img="$(tempfile --suffix .png)"
 trap "rm -f '$img'" EXIT
 
 
-if [ "$have_msg" -eq 0 ]; then
+if [ "$wifi" -gt 0 ]; then
+    if [ "$#" -ne 2 ]; then
+        usage >&2
+        exit 1
+    fi
+    essid="$1"; shift
+    password="$1"; shift
+    echo "WIFI:T:WPA;S:${essid};P:${password};;" | qrencode -s 5 -l H -o "$img"
+elif [ "$have_msg" -eq 0 ]; then
     if [ "$#" -gt 1 ]; then
         usage >&2
         exit 1
@@ -75,8 +89,7 @@ if [ "$have_msg" -eq 0 ]; then
         stdin="$(tempfile)"
         trap "rm -f '$img' '$stdin'" EXIT
         cat > "$stdin"
-        set dummy "$stdin"
-        shift
+        set -- "$stdin"
     fi
 
     fn="$1"; shift
-- 
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