Initial commit.

This creates a working buildable dummy template to build the project
upon. Everything save for the build system are demonstrational dummies
and everything including the build system is written to be easily
extendable.

This commit closes Ticket 5.

Signed-off-by: Gediminas Jakutis <gediminas@varciai.lt>

8 files changed, 195 insertions, 0 deletions

diff --git a/src/daemon/genversion.sh b/src/daemon/genversion.sh
new file mode 100755
index 0000000..d182db6
--- /dev/null
+++ b/src/daemon/genversion.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+versionstring=$(git describe 2>/dev/null)
+
+if [[ -z $versionstring ]]; then
+	versionstring=$(cat $1)
+fi
+
+echo "const char * const version = \"$versionstring\";" > $2
diff --git a/src/daemon/main.c b/src/daemon/main.c
new file mode 100644
index 0000000..9ecdd4d
--- /dev/null
+++ b/src/daemon/main.c
@@ -0,0 +1,45 @@
+/*
+ * Usurpation – server daemon main logic
+ *
+ * Copyright (C) 2019 Gediminas Jakutis
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; version 2.1
+ * of the License.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <unistd.h>
+#include <time.h>
+#include <stdio.h>
+#include "settings.h"
+
+/* the logic is a placeholder right now */
+int main(int argc, char **argv)
+{
+	extern const char * const version;
+	struct timespec t = {3600, 0}; /* one hour */
+
+	printf("Usurpation daemon version %s starting\n", version);
+
+	/* by default and if running by as a system service, the init system
+	 * needs to keep control of the process and thus only detach if
+	 * requested when ran manually by a user.
+	 */
+	if (setting_detach()) {
+		daemon(0, 0);
+	}
+
+	while(!(nanosleep(&t, NULL))) {
+		/* noop */
+	}
+}
diff --git a/src/daemon/meson.build b/src/daemon/meson.build
new file mode 100644
index 0000000..48190c8
--- /dev/null
+++ b/src/daemon/meson.build
@@ -0,0 +1,20 @@
+d_filenames = [
+	'main.c',
+	'settings.c',
+]
+
+d_conf_filenames = [
+	'usurpation.conf'
+]
+
+d_version_filename = 'version.c'
+
+version_script = files('genversion.sh')
+
+version = custom_target('version',
+		input : version_fallback,
+		output : d_version_filename,
+		command : [version_script, '@INPUT@', '@OUTPUT@'])
+
+d_sources = files(d_filenames)
+d_conf = files(d_conf_filenames)
diff --git a/src/daemon/settings.c b/src/daemon/settings.c
new file mode 100644
index 0000000..6796ac1
--- /dev/null
+++ b/src/daemon/settings.c
@@ -0,0 +1,35 @@
+/*
+ * Usurpation – server daemon settings handling
+ *
+ * Copyright (C) 2019 Gediminas Jakutis
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; version 2.1
+ * of the License.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include "settings.h"
+
+static struct settings {
+	int daemonize;
+} settings;
+
+int setting_detach(void)
+{
+	/* should be, in this order: looking at options provided via command
+	 * line arguments, looking at at /etc/conf.d/usurpation.conf or
+	 * using default.
+	 * Right now just uses default.
+	 */
+	return settings.daemonize;
+}
diff --git a/src/daemon/usurpation.conf b/src/daemon/usurpation.conf
new file mode 100644
index 0000000..3407ef1
--- /dev/null
+++ b/src/daemon/usurpation.conf
@@ -0,0 +1,2 @@
+# currently the configuration file is unused
+deamonize 0
diff --git a/src/device/main.ino b/src/device/main.ino
new file mode 100644
index 0000000..b028d17
--- /dev/null
+++ b/src/device/main.ino
@@ -0,0 +1,62 @@
+/*
+ * Usurpation – wearable device main logic
+ *
+ * Copyright (C) 2019 Gediminas Jakutis
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; version 2.1
+ * of the License.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <stdlib.h>
+
+static const unsigned int internal_led = 2;
+
+unsigned int toggleled(void);
+
+void setup(void)
+{
+	pinMode(internal_led, OUTPUT);
+
+	/* don't set pin mode here, it will get toggled at the very start of
+	 * the logic loop, either way.
+	 */
+}
+
+/* the logic is a placeholder right now */
+void loop(void)
+{
+	/* sleep length to use */
+	static unsigned int delta = 100;
+
+	/* progresivelly grow the time delta while changing state*/
+	delta += delta >> (6 + toggleled());
+
+	/* sleep */
+	delay(delta);
+}
+
+/* toggle the bult-in led and return current state */
+unsigned int toggleled(void)
+{
+	static unsigned int state = 0;
+
+	state = !state;
+	/* as the cathode of the builtin diode is connected to the MCU's pin,
+	 * while the anode is connected to Vcc, to turn it off, we need to set
+	 * the pin to HIGH.
+	 */
+	digitalWrite(internal_led, state ? LOW : HIGH);
+
+	return state;
+}
diff --git a/src/device/meson.build b/src/device/meson.build
new file mode 100644
index 0000000..9bb9b69
--- /dev/null
+++ b/src/device/meson.build
@@ -0,0 +1,17 @@
+fw_image = 'fw.bin'
+if get_option('fwbuild')
+	espmake = find_program('espmake')
+
+	sourcedir = meson.current_source_dir()
+	fw_filenames = ['main.ino']
+	fw_sources = files(fw_filenames)
+	fw = custom_target('fw',
+			output : fw_image,
+			input : fw_sources,
+			command : [espmake, '-C', sourcedir, '&&', 'cp', '/tmp/mkESP/main_d1_mini/main.bin', '@OUTDIR@/' + fw_image], install : true, install_dir : resource_dir)
+
+	if get_option('fwflash')
+		esptool = find_program('esptool.py')
+		run_target('flash_fw', depends : fw, command : [esptool, 'write_flash', '0x0', fw])
+	endif
+endif
diff --git a/src/meson.build b/src/meson.build
new file mode 100644
index 0000000..be166e6
--- /dev/null
+++ b/src/meson.build
@@ -0,0 +1,5 @@
+subdir('daemon')
+subdir('device')
+
+sources = [d_sources]
+conf = [d_conf]