Import qmi-proxy plugin by Andy Savage

Andy writes:

  qmi-proxy plugin is for libqmi, or specifically the qmicli cli tool
  for qmi_wwan.ko module so you can run multiple commands using the same
  lte device at once without worrying about allocating/releasing ids.

https://github.com/hongkongkiwi/finit/blob/master/plugins/qmi-proxy.c

Signed-off-by: Joachim Wiberg <[email protected]>

Author: troglobit

configure.ac

@@ -23,6 +23,7 @@ PKG_CHECK_MODULES([lite], [libite >= 2.2.0])
 # Check for extra plugins to enable
 enable_all_plugins=auto
 AC_PLUGIN([chrony],    [no], [Set up and start system time service chronyd])
+AC_PLUGIN([qmi-proxy], [no], [Setup and start system qmicli proxy])
 
 AC_EXPAND_DIR(plugin_path, "$libdir/finit/plugins")
 AC_SUBST(plugin_path)

src/Makefile.am

@@ -10,3 +10,7 @@ pkglib_LTLIBRARIES  =
 if BUILD_CHRONY_PLUGIN
 pkglib_LTLIBRARIES += chronyd.la
 endif
+
+if BUILD_QMI_PROXY_PLUGIN
+pkglib_LTLIBRARIES += qmi-proxy.la
+endif

src/qmi-proxy.c

@@ -0,0 +1,109 @@
+/* Setup and start system qmicli proxy
+ *
+ * Portions Copyright (c) 2012-2022 Joachim Wiberg <[email protected]>
+ * Portions Copyright (c) 2022 Andy Savage <[email protected]>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <sys/types.h>
+#ifndef _LIBITE_LITE
+# include <lite/lite.h>
+#else
+# include <libite/lite.h>
+#endif
+
+#include "finit/finit.h"
+#include "finit/helpers.h"
+#include "finit/plugin.h"
+#include "finit/service.h"
+#include "finit/conf.h"
+
+#define QMI_PROXY_DAEMON "/usr/libexec/qmi-proxy"
+#define QMI_PROXY_ARGS   "--no-exit"
+#define QMI_PROXY_DESC   "Proxy for QMI devices"
+
+#ifndef QMI_PROXY_DAEMONUSER
+#define QMI_PROXY_DAEMONUSER "root"
+#endif
+
+#ifndef QMI_PROXY_DAEMONGROUP
+#define QMI_PROXY_DAEMONGROUP "root"
+#endif
+
+#ifndef QMI_PROXY_DAEMONPIDFILE
+#define QMI_PROXY_DAEMONPIDFILE "/var/run/qmi-proxy.pid"
+#endif
+
+static void setup(void *arg)
+{
+	char line[256];
+	mode_t prev;
+	char *cmd;
+
+	if (rescue) {
+		_d("Skipping %s plugin in rescue mode.", __FILE__);
+		return;
+	}
+
+	cmd = which(QMI_PROXY_DAEMON);
+	if (!cmd) {
+		_d("Skipping plugin, %s is not installed.", QMI_PROXY_DAEMON);
+		return;
+	}
+
+	prev =umask(0);
+
+	/* Clean up from any previous pre-bootstrap run */
+	remove(QMI_PROXY_DAEMONPIDFILE);
+
+	/* Register service with Finit */
+	snprintf(line, sizeof(line), "[S12345789] cgroup.system pid:!%s @%s:%s %s %s -- %s",
+		 QMI_PROXY_DAEMONPIDFILE, QMI_PROXY_DAEMONUSER, QMI_PROXY_DAEMONUSER, cmd, QMI_PROXY_ARGS, QMI_PROXY_DESC);
+	if (service_register(SVC_TYPE_SERVICE, line, global_rlimit, NULL))
+		_pe("Failed registering %s", QMI_PROXY_DAEMON);
+	free(cmd);
+
+	umask(prev);
+}
+
+static plugin_t plugin = {
+	.name = __FILE__,
+	.hook[HOOK_BASEFS_UP] = {
+		.cb  = setup
+	},
+	.depends = { "bootmisc", "mdevd" },
+};
+
+PLUGIN_INIT(plugin_init)
+{
+	plugin_register(&plugin);
+}
+
+PLUGIN_EXIT(plugin_exit)
+{
+	plugin_unregister(&plugin);
+}
+
+/**
+ * Local Variables:
+ *  indent-tabs-mode: t
+ *  c-file-style: "linux"
+ * End:
+ */