From d905c9da4d8984f19cd74a17cebd2743d399b035 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Mon, 30 Nov 2015 14:49:56 +0100
Subject: Reorganize source directory

---
 src/unitd/early.c | 96 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 src/unitd/early.c

(limited to 'src/unitd/early.c')

diff --git a/src/unitd/early.c b/src/unitd/early.c
new file mode 100644
index 0000000..644c15d
--- /dev/null
+++ b/src/unitd/early.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2015 Matthias Schiffer <mschiffer@universe-factory.net>
+ *
+ * Based on "procd" by:
+ * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
+ *
+ * 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.
+ */
+
+#include "unitd.h"
+
+#include <sys/mount.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+
+static void
+early_console(const char *dev)
+{
+	struct stat s;
+	int dd;
+
+	if (stat(dev, &s)) {
+		ERROR("Failed to stat %s\n", dev);
+		return;
+	}
+
+	dd = open(dev, O_RDWR);
+	if (dd < 0)
+		dd = open("/dev/null", O_RDWR);
+
+	dup2(dd, STDIN_FILENO);
+	dup2(dd, STDOUT_FILENO);
+	dup2(dd, STDERR_FILENO);
+
+	if (dd != STDIN_FILENO &&
+	    dd != STDOUT_FILENO &&
+	    dd != STDERR_FILENO)
+		close(dd);
+
+	fcntl(STDERR_FILENO, F_SETFL, fcntl(STDERR_FILENO, F_GETFL) | O_NONBLOCK);
+}
+
+static void
+early_mounts(void)
+{
+	unsigned int oldumask = umask(0);
+
+	mount("proc", "/proc", "proc", MS_NOATIME | MS_NODEV | MS_NOEXEC | MS_NOSUID, NULL);
+	mount("sys", "/sys", "sysfs", MS_NOATIME | MS_NODEV | MS_NOEXEC | MS_NOSUID, NULL);
+	mount("cgroup", "/sys/fs/cgroup", "cgroup",  MS_NODEV | MS_NOEXEC | MS_NOSUID, NULL);
+	mount("dev", "/dev", "devtmpfs", MS_NOATIME | MS_NOSUID, "mode=0755,size=512K");
+
+	mkdir("/dev/pts", 0755);
+	mount("devpts", "/dev/pts", "devpts", MS_NOATIME | MS_NOEXEC | MS_NOSUID, "mode=600");
+
+	mount("run", "/run", "tmpfs", MS_NOATIME, "mode=0755");
+
+	mkdir("/run/tmp", 01777);
+	mount("/run/tmp", "/tmp", NULL, MS_BIND, NULL);
+
+	mkdir("/run/shm", 01777);
+	mkdir("/dev/shm", 0755);
+	mount("/run/shm", "/dev/shm", NULL, MS_BIND, NULL);
+
+	umask(oldumask);
+}
+
+static void
+early_env(void)
+{
+	setenv("PATH", "/bin:/sbin:/usr/bin:/usr/sbin", 1);
+}
+
+void
+unitd_early(void)
+{
+	early_mounts();
+	early_console("/dev/console");
+	early_env();
+
+	LOG("Console is alive\n");
+}
-- 
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