From 475143e6a7fd771cd588045ad1d1be2cb424f0c2 Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Sat, 30 Jan 2021 20:07:48 +0100
Subject: trocken-fertig

---
 .gitignore                 |   6 ++-
 Makefile                   |  62 ++++++++++++++++++++++
 configure-gpio.service     |  25 ---------
 httpdocs/index.php         |  76 ---------------------------
 index.php.in               |  87 +++++++++++++++++++++++++++++++
 lights-out-init.service.in |  10 ++++
 lights-out.conf            |   8 +++
 lights-out.in              | 126 +++++++++++++++++++++++++++++++++++++++++++++
 lights-out@.service.in     |   8 +++
 9 files changed, 305 insertions(+), 103 deletions(-)
 create mode 100644 Makefile
 delete mode 100644 configure-gpio.service
 delete mode 100644 httpdocs/index.php
 create mode 100644 index.php.in
 create mode 100644 lights-out-init.service.in
 create mode 100644 lights-out.conf
 create mode 100644 lights-out.in
 create mode 100644 lights-out@.service.in

diff --git a/.gitignore b/.gitignore
index 0191024..b9bf5ae 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
-.ssh
-password
+index.php
+lights-out-init.service
+lights-out
+lights-out@.service
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..e71cf0c
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,62 @@
+#
+#  lights-out - simple skripts for lights-out like management from a raspi
+#
+#  Copyright (c) 2021 Erich Eckner <opensource at eckner dot net>
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+#  USA.
+#
+
+SHELL	 = /bin/bash
+DESTDIR	 =
+ETCDIR	 = /etc
+BINDIR	 = /usr/bin
+LIBDIR	 = /usr/lib
+HTTPDIR	 = /srv/http/lights-out
+
+VERSION  = 0.0
+
+all: index.php lights-out lights-out-init.service lights-out@.service
+
+%: %.in
+	sed " \
+		s/#VERSION#/$(VERSION)/; \
+		s@#BINDIR#@$(BINDIR)@; \
+		s@#ETCDIR#@$(ETCDIR)@; \
+		s@#HELPTEXT#\(\s\+\)#@  --help   \1display this help and exit\n  --version\1display version and exit@; \
+		" $< > $@ && \
+	( [[ "$@" = *.* ]] || chmod +x "$@" )
+
+.PHONY:	install dist clean
+
+install: all
+	install -D -m0755 -t $(DESTDIR)$(BINDIR) lights-out
+	install -D -m0644 -t $(DESTDIR)$(LIBDIR)/systemd/system lights-out@.service lights-out-init.service
+	install -D -m0644 -t $(DESTDIR)$(ETCDIR) lights-out.conf
+	install -D -m0644 -t $(DESTDIR)$(HTTPDIR)/httpdocs index.php
+	install -D -m0600 -o http -g http /dev/null $(DESTDIR)$(HTTPDIR)/password
+
+clean:
+	git clean -x -d -f
+
+dist: clean
+	git status --porcelain 2> /dev/null | grep -q "\S" && (git add .; git commit -m"neue Version: $(VERSION)") || true
+	! git tag -d v$(VERSION) 2> /dev/null
+	git tag v$(VERSION)
+	knock-knock || true
+	git push
+	git push --tags
+
+# End of file
diff --git a/configure-gpio.service b/configure-gpio.service
deleted file mode 100644
index 39fe311..0000000
--- a/configure-gpio.service
+++ /dev/null
@@ -1,25 +0,0 @@
-[Unit]
-Description=configure the GPIO pins
-
-[Service]
-Type=oneshot
-RemainAfterExit=yes
-
-# power led
-ExecStart=/usr/bin/gpio mode 7 in
-ExecStart=/usr/bin/gpio mode 7 up
-
-# hdd led
-ExecStart=/usr/bin/gpio mode 15 in
-ExecStart=/usr/bin/gpio mode 15 up
-
-# power switch
-ExecStart=/usr/bin/gpio mode 9 out
-ExecStart=/usr/bin/gpio write 9 0
-
-# reset switch
-ExecStart=/usr/bin/gpio mode 8 out
-ExecStart=/usr/bin/gpio write 8 0
-
-[Install]
-WantedBy=multi-user.target
diff --git a/httpdocs/index.php b/httpdocs/index.php
deleted file mode 100644
index a697be3..0000000
--- a/httpdocs/index.php
+++ /dev/null
@@ -1,76 +0,0 @@
-<?php
-
-$f = popen('/usr/bin/gpio read 7', 'r');
-if ($f === false) {
-  print 'Cannot access gpio';
-  die();
-}
-$l = trim(fgets($f));
-pclose($f);
-
-if ($l == '') {
-  print 'Cannot read gpio - is it installed?';
-  die();
-}
-
-if (array_key_exists('HTTPS', $_SERVER)
-&& ($_SERVER['HTTPS'] == 'on'))
-  $https = true;
-else
-  $https = false;
-
-function push_it() {
-  if (!array_key_exists('password', $_POST))
-    return;
-  $f = fopen('../password', 'r');
-  if ($f === false) {
-    print '<font color="ff0000">Cannot read password file</font><br>' . "\n";
-    return;
-  }
-  $saved_hash = trim(fgets($f));
-  fclose($f);
-  $entered_hash = hash('sha512', $_POST['password']);
-  if ($saved_hash != $entered_hash) {
-    print '<font color="ff0000">Wrong password: ' . $entered_hash . '</font><br>' . "\n";
-    return;
-  }
-  foreach ($_POST as $key => $dummy)
-    if (preg_match('/^push_([0-9]+)$/', $key, $duration))
-      break;
-  if (count($duration) != 2)
-    return;
-  $duration = $duration[1];
-  if (($duration > 0)
-  && ($duration < 300)) {
-    print 'pushing for ' . ($duration * 0.1) . ' seconds ... <br>' . "\n";
-    shell_exec('/usr/bin/gpio write 9 1');
-    flush();
-    usleep(100000 * $duration);
-    shell_exec('/usr/bin/gpio write 9 0');
-    print '... done<br>' . "\n";
-  }
-}
-
-print '<html>' . "\n";
-print '<head>' . "\n";
-print '<title>fenster lights-out</title>' . "\n";
-if (array_key_exists('password', $_POST))
-  print '<meta http-equiv="refresh" content="1;/">' . "\n";
-print '</head>' . "\n";
-print '<body>' . "\n";
-print 'Fenster is currently ';
-if ($l == '1')
-  print '<font color="ff0000">off</font>';
-else
-  print '<font color="00ff00">on</font>';
-print '<br>' . "\n";
-if ($https) {
-  push_it();
-  print '<form action="" method="post">' . "\n";
-  print 'Passwort: <input name="password" type="password"><br>' . "\n";
-  print '<input type="submit" name="push_1" value="short power button push"><br>' . "\n";
-  print '<input type="submit" name="push_150" value="long power button push"><br>' . "\n";
-  print '</form>' . "\n";
-}
-print '</body>' . "\n";
-print '</html>' . "\n";
diff --git a/index.php.in b/index.php.in
new file mode 100644
index 0000000..c3dc987
--- /dev/null
+++ b/index.php.in
@@ -0,0 +1,87 @@
+<?php
+
+$f = popen('#BINDIR#/lights-out get power', 'r');
+if ($f === false) {
+  print 'Cannot getpower status' . "\n";
+  die();
+}
+$power = trim(fgets($f));
+pclose($f);
+
+if ($power == '') {
+  print 'Cannot read gpio - is it installed?' . "\n";
+  die();
+}
+
+$f = popen('#BINDIR#/lights-out name', 'r');
+if ($f === false) {
+  print 'Error reading server name' . "\n";
+  die();
+}
+$server = trim(fgets($f));
+pclose($f);
+
+if ($server == '') {
+  print 'Empty server name in config' . "\n";
+  die();
+}
+
+if (array_key_exists('HTTPS', $_SERVER)
+&& ($_SERVER['HTTPS'] == 'on'))
+  $https = true;
+else
+  $https = false;
+
+function push_it() {
+  if (!array_key_exists('password', $_POST))
+    return;
+  $f = fopen('../password', 'r');
+  if ($f === false) {
+    print '<font color="ff0000">Cannot read password file</font><br>' . "\n";
+    return;
+  }
+  $saved_hash = trim(fgets($f));
+  fclose($f);
+  $entered_hash = hash('sha512', $_POST['password']);
+  if ($saved_hash != $entered_hash) {
+    print '<font color="ff0000">Wrong password: ' . $entered_hash . '</font><br>' . "\n";
+    return;
+  }
+  foreach ($_POST as $key => $dummy)
+    if (preg_match('/^push_([0-9]+)$/', $key, $duration))
+      break;
+  if (count($duration) != 2)
+    return;
+  $duration = $duration[1];
+  if (($duration > 0)
+  && ($duration < 300)) {
+    print 'pushing power button for ' . ($duration * 0.1) . ' seconds ... <br>' . "\n";
+    flush();
+    shell_exec('#BINDIR#/lights-out push power ' . ($duration * 0.1));
+    print '... done<br>' . "\n";
+  }
+}
+
+print '<html>' . "\n";
+print '<head>' . "\n";
+print '<title>fenster lights-out</title>' . "\n";
+if (array_key_exists('password', $_POST))
+  print '<meta http-equiv="refresh" content="1;/">' . "\n";
+print '</head>' . "\n";
+print '<body>' . "\n";
+print 'Fenster is currently ';
+if ($power == '0')
+  print '<font color="ff0000">off</font>';
+else
+  print '<font color="00ff00">on</font>';
+print '<br>' . "\n";
+if ($https) {
+  push_it();
+  print '<form action="" method="post">' . "\n";
+  print 'Passwort: <input name="password" type="password"><br>' . "\n";
+  print '<input type="submit" name="push_1" value="short power button push"><br>' . "\n";
+  print '<input type="submit" name="push_150" value="long power button push"><br>' . "\n";
+  print '</form>' . "\n";
+}
+print '</body>' . "\n";
+print '</html>' . "\n";
diff --git a/lights-out-init.service.in b/lights-out-init.service.in
new file mode 100644
index 0000000..a7e0f55
--- /dev/null
+++ b/lights-out-init.service.in
@@ -0,0 +1,10 @@
+[Unit]
+Description=configure the GPIO pins for lights out
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=#BINDIR#/lights-out init
+
+[Install]
+WantedBy=multi-user.target
diff --git a/lights-out.conf b/lights-out.conf
new file mode 100644
index 0000000..7f6dc9e
--- /dev/null
+++ b/lights-out.conf
@@ -0,0 +1,8 @@
+#!/hint/bash
+
+server='fenster'
+
+inputs['power']=7
+inputs['hdd']=15
+outputs['power']=9
+outputs['reset']=8
diff --git a/lights-out.in b/lights-out.in
new file mode 100644
index 0000000..144d7bd
--- /dev/null
+++ b/lights-out.in
@@ -0,0 +1,126 @@
+#!/bin/bash
+
+display_help() {
+  >&2 printf 'lights-out version #VERSION#\n'
+  >&2 printf '\n'
+  >&2 printf 'usage:\n'
+  >&2 printf '  lights-out get $input: display inverted pin state of $input\n'
+  >&2 printf '  lights-out help: display this help and exit\n'
+  >&2 printf '  lights-out init: init gpio\n'
+  >&2 printf '  lights-out name: print the name of the server\n'
+  >&2 printf '  lights-out push $output $time: simulate push on $output for $time seconds\n'
+  >&2 printf '  lights-out turn on: turn on machine if not yet running\n'
+}
+
+check_argument_count() {
+  local count="$1"
+  shift
+  if [ $# -ne "${count}" ]; then
+    >&2 printf 'wrong number of arguments: "%s" expects %s argument' "$1" "${count}"
+    if [ "${count}" -ne 1 ]; then
+      printf 's'
+    fi
+    printf ', but %s were given\n\n' "$#"
+    display_help
+    exit 1
+  fi
+}
+
+if [ $# -lt 1 ]; then
+  display_help
+  exit 1
+fi
+
+if [ ! -r '#ETCDIR#/lights-out.conf' ]; then
+  >&2 printf 'cannot read config file "#ETCDIR#/lights-out.conf"\n'
+  exit 1
+fi
+
+if ! command -v gpio >/dev/null 2>&1; then
+  >&2 printf 'cannot find command "gpio" - is it installed?\n'
+  exit
+fi
+
+unset inputs
+unset outputs
+declare -A inputs
+declare -A outputs
+
+. '#ETCDIR#/lights-out.conf'
+
+if [ -z "${inputs['power']}" ]; then
+  >&2 printf 'invalid config "#ETCDIR#/lights-out.conf": no power input defined.\n'
+  exit 1
+fi
+
+if [ -z "${outputs['power']}" ]; then
+  >&2 printf 'invalid config "#ETCDIR#/lights-out.conf": no power output defined.\n'
+  exit 1
+fi
+
+if [ -z "${server}" ]; then
+  >&2 printf 'invalid config "#ETCDIR#/lights-out.conf": no server name defined.\n'
+  exit 1
+fi
+
+case "$1" in
+  'get')
+    check_argument_count 2 "$@"
+    if [ -z "${inputs["$2"]}" ]; then
+      >&2 printf 'unknown input "%s"\n\n' "$2"
+      display_help
+      exit 1
+    fi
+    value=$(
+      gpio read "${inputs["$2"]}"
+    ) || exit $?
+    echo $((1-value))
+  ;;
+  'help')
+    display_help
+  ;;
+  'init')
+    check_argument_count 1 "$@"
+    for input in "${inputs[@]}"; do
+      gpio mode "${input}" in || exit $?
+      gpio mode "${input}" up || exit $?
+    done
+    for output in "${outputs[@]}"; do
+      gpio write "${output}" 0 || exit $?
+      gpio mode "${output}" out || exit $?
+    done
+  ;;
+  'name')
+    printf '%s\n' "${server}"
+  ;;
+  'push')
+    check_argument_count 3 "$@"
+    if [ -z "${outputs["$2"]}" ]; then
+      >&2 printf 'unknown output "%s"\n\n' "$2"
+      display_help
+      exit 1
+    fi
+    gpio write "${outputs["$2"]}" 1 || exit $?
+    sleep "$3"
+    gpio write "${outputs["$2"]}" 0 || exit $?
+  ;;
+  'turn')
+    if [ $# -ne 3 ] \
+    || [ "x$3" != 'xon' ]; then
+      >&2 printf 'unknown command "%s"\n\n' "$*"
+      display_help
+      exit 1
+    fi
+    value=$(
+      "$0" get power
+    ) || exit $?
+    if [ "${value}" -eq 0 ]; then
+      "$0" push power 0.1 || exit $?
+    fi
+  ;;
+  *)
+    >&2 printf 'unknown command "%s"\n\n' "$1"
+    display_help
+    exit 1
+  ;;
+esac
diff --git a/lights-out@.service.in b/lights-out@.service.in
new file mode 100644
index 0000000..2fe6759
--- /dev/null
+++ b/lights-out@.service.in
@@ -0,0 +1,8 @@
+[Unit]
+Description=lights out %I
+Needs=lights-out-init.service
+After=lights-out-init.service
+
+[Service]
+Type=oneshot
+ExecStart=#BINDIR#/lights-out %I
-- 
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