busybox: add mdev support

* adjust SlugOS defconfig to enable mdev
* add mdev startup script (similar to udev init)
* add mdev.conf with correct device permissions/actions

4 files changed, 117 insertions, 12 deletions

diff --git a/packages/busybox/busybox-1.2.1/busybox-mdev.sh b/packages/busybox/busybox-1.2.1/busybox-mdev.sh
new file mode 100755
index 0000000000..9744322fa9
--- /dev/null
+++ b/packages/busybox/busybox-1.2.1/busybox-mdev.sh
@@ -0,0 +1,69 @@
+#!/bin/sh
+MDEV=/sbin/mdev
+DESC="Busybox mdev setup"
+
+# Complain if thing's aren't right
+if [ ! -e /proc/filesystems ]; then
+  echo "mdev requires a mounted procfs, not started."
+  exit 1
+fi
+
+if ! grep -q '[[:space:]]tmpfs$' /proc/filesystems; then
+  echo "mdev requires tmpfs support, not started."
+  exit 1
+fi
+
+if [ ! -d /sys/class/ ]; then
+  echo "mdev requires a mounted sysfs, not started."
+  exit 1
+fi
+
+if [ ! -e /proc/sys/kernel/hotplug ]; then
+  echo "mdev requires hotplug support, not started."
+  exit 1
+fi
+
+# We need to unmount /dev/pts/ and remount it later over the tmpfs
+if mountpoint -q /dev/pts/; then
+  umount -l /dev/pts/
+fi
+
+if mountpoint -q /dev/shm/; then
+  umount -l /dev/shm/
+fi
+
+# Create tmpfs for /dev
+echo "Creating tmpfs at /dev"
+mount -t tmpfs tmpfs /dev -o size=800k
+
+# Register mdev as hotplug event helper
+echo "$MDEV" > /proc/sys/kernel/hotplug
+
+# Populate /dev from /sys info
+echo "Populating /dev using mdev"
+$MDEV -s
+
+# Touch .udev to inform scripts that /dev needs no further setup
+touch /dev/.udev
+
+# Mount devpts
+TTYGRP=5
+TTYMODE=620
+mkdir -m 755 -p /dev/pts
+if [ ! -e /dev/ptmx ]; then
+    mknod -m 666 /dev/ptmx c 5 2
+fi
+mount -t devpts devpts /dev/pts -onoexec,nosuid,gid=$TTYGRP,mode=$TTYMODE
+
+# Make shm directory
+mkdir -m 755 -p /dev/shm
+
+# Make extraneous links
+ln -sf /proc/self/fd /dev/fd
+ln -sf /proc/self/fd/0 /dev/stdin
+ln -sf /proc/self/fd/1 /dev/stdout
+ln -sf /proc/self/fd/2 /dev/stderr
+ln -sf /proc/kcore /dev/core
+ln -sf /proc/asound/oss/sndstat /dev/sndstat
+
+exit 0
diff --git a/packages/busybox/busybox-1.2.1/mdev.conf b/packages/busybox/busybox-1.2.1/mdev.conf
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/packages/busybox/busybox-1.2.1/mdev.conf
diff --git a/packages/busybox/busybox-1.2.1/slugos/defconfig b/packages/busybox/busybox-1.2.1/slugos/defconfig
index c35b4f7f70..2985e0fbca 100644
--- a/packages/busybox/busybox-1.2.1/slugos/defconfig
+++ b/packages/busybox/busybox-1.2.1/slugos/defconfig
@@ -12,7 +12,7 @@ HAVE_DOT_CONFIG=y
 #
 # CONFIG_NITPICK is not set
 # CONFIG_FEATURE_BUFFERS_USE_MALLOC is not set
-CONFIG_FEATURE_BUFFERS_GO_ON_STACK=y
+# CONFIG_FEATURE_BUFFERS_GO_ON_STACK is not set
 # CONFIG_FEATURE_BUFFERS_GO_IN_BSS is not set
 CONFIG_SHOW_USAGE=y
 CONFIG_FEATURE_VERBOSE_USAGE=y
@@ -287,12 +287,24 @@ CONFIG_FEATURE_VI_OPTIMIZE_CURSOR=y
 # Finding Utilities
 #
 # CONFIG_FIND is not set
-CONFIG_FEATURE_FIND_EXEC=y
+# CONFIG_FEATURE_FIND_PRINT0 is not set
+# CONFIG_FEATURE_FIND_MTIME is not set
+# CONFIG_FEATURE_FIND_MMIN is not set
+# CONFIG_FEATURE_FIND_PERM is not set
+# CONFIG_FEATURE_FIND_TYPE is not set
+# CONFIG_FEATURE_FIND_XDEV is not set
+# CONFIG_FEATURE_FIND_NEWER is not set
+# CONFIG_FEATURE_FIND_INUM is not set
+# CONFIG_FEATURE_FIND_EXEC is not set
 CONFIG_GREP=y
 CONFIG_FEATURE_GREP_EGREP_ALIAS=y
 CONFIG_FEATURE_GREP_FGREP_ALIAS=y
 CONFIG_FEATURE_GREP_CONTEXT=y
 # CONFIG_XARGS is not set
+# CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION is not set
+# CONFIG_FEATURE_XARGS_SUPPORT_QUOTES is not set
+# CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT is not set
+# CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM is not set
 
 #
 # Init Utilities
@@ -343,16 +355,19 @@ CONFIG_MKE2FS=y
 # Linux Module Utilities
 #
 # CONFIG_INSMOD is not set
+# CONFIG_FEATURE_INSMOD_VERSION_CHECKING is not set
+# CONFIG_FEATURE_INSMOD_KSYMOOPS_SYMBOLS is not set
+# CONFIG_FEATURE_INSMOD_LOADINKMEM is not set
+# CONFIG_FEATURE_INSMOD_LOAD_MAP is not set
+# CONFIG_FEATURE_INSMOD_LOAD_MAP_FULL is not set
 # CONFIG_RMMOD is not set
 # CONFIG_LSMOD is not set
+# CONFIG_FEATURE_LSMOD_PRETTY_2_6_OUTPUT is not set
 # CONFIG_MODPROBE is not set
-
-#
-# Options common to multiple modutils
-#
-CONFIG_FEATURE_CHECK_TAINTED_MODULE=y
+# CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS is not set
+# CONFIG_FEATURE_CHECK_TAINTED_MODULE is not set
 # CONFIG_FEATURE_2_4_MODULES is not set
-CONFIG_FEATURE_2_6_MODULES=y
+# CONFIG_FEATURE_2_6_MODULES is not set
 # CONFIG_FEATURE_QUERY_MODULE_INTERFACE is not set
 
 #
@@ -360,6 +375,8 @@ CONFIG_FEATURE_2_6_MODULES=y
 #
 CONFIG_DMESG=y
 # CONFIG_FBSET is not set
+# CONFIG_FEATURE_FBSET_FANCY is not set
+# CONFIG_FEATURE_FBSET_READMODE is not set
 # CONFIG_FDFLUSH is not set
 # CONFIG_FDFORMAT is not set
 CONFIG_FDISK=y
@@ -373,6 +390,7 @@ CONFIG_FEATURE_OSF_LABEL=y
 # CONFIG_FREERAMDISK is not set
 # CONFIG_FSCK_MINIX is not set
 # CONFIG_MKFS_MINIX is not set
+# CONFIG_FEATURE_MINIX2 is not set
 # CONFIG_GETOPT is not set
 CONFIG_HEXDUMP=y
 CONFIG_HWCLOCK=y
@@ -381,9 +399,9 @@ CONFIG_FEATURE_HWCLOCK_ADJTIME_FHS=y
 # CONFIG_IPCRM is not set
 # CONFIG_IPCS is not set
 # CONFIG_LOSETUP is not set
-# CONFIG_MDEV is not set
-# CONFIG_FEATURE_MDEV_CONF is not set
-# CONFIG_FEATURE_MDEV_EXEC is not set
+CONFIG_MDEV=y
+CONFIG_FEATURE_MDEV_CONF=y
+CONFIG_FEATURE_MDEV_EXEC=y
 CONFIG_MKSWAP=y
 # CONFIG_FEATURE_MKSWAP_V0 is not set
 CONFIG_MORE=y
@@ -398,6 +416,8 @@ CONFIG_RDATE=y
 # CONFIG_SWITCH_ROOT is not set
 # CONFIG_UMOUNT is not set
 # CONFIG_FEATURE_UMOUNT_ALL is not set
+# CONFIG_FEATURE_MOUNT_LOOP is not set
+# CONFIG_FEATURE_MTAB_SUPPORT is not set
 
 #
 # Miscellaneous Utilities
@@ -486,6 +506,11 @@ CONFIG_FEATURE_IFUPDOWN_IPV6=y
 # CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN is not set
 # CONFIG_FEATURE_INETD_RPC is not set
 # CONFIG_IP is not set
+# CONFIG_FEATURE_IP_ADDRESS is not set
+# CONFIG_FEATURE_IP_LINK is not set
+# CONFIG_FEATURE_IP_ROUTE is not set
+# CONFIG_FEATURE_IP_TUNNEL is not set
+# CONFIG_FEATURE_IP_SHORT_FORMS is not set
 # CONFIG_IPADDR is not set
 # CONFIG_IPLINK is not set
 # CONFIG_IPROUTE is not set
@@ -523,7 +548,7 @@ CONFIG_TRACEROUTE=y
 #
 # CONFIG_APP_UDHCPD is not set
 CONFIG_APP_UDHCPC=y
-CONFIG_APP_DUMPLEASES=y
+# CONFIG_APP_DUMPLEASES is not set
 CONFIG_FEATURE_UDHCP_SYSLOG=y
 # CONFIG_FEATURE_UDHCP_DEBUG is not set
 # CONFIG_VCONFIG is not set
diff --git a/packages/busybox/busybox-1.2.1/slugos/mdev.conf b/packages/busybox/busybox-1.2.1/slugos/mdev.conf
new file mode 100644
index 0000000000..31acaf83a3
--- /dev/null
+++ b/packages/busybox/busybox-1.2.1/slugos/mdev.conf
@@ -0,0 +1,11 @@
+rtc0 root:root 660 @ln -sf /dev/rtc0 /dev/rtc
+null 0:0 777
+zero 0:0 666
+console 0:5 0600
+kmem 0:9 000
+mem 0:9 0640
+port 0:9 0640
+ptmx 0:5 666
+tty 0:5 0660
+ttyS* 0:20 640
+ucode_dl root:root 600 @sleep 1 && cat /lib/firmware/NPE-B > /dev/ucode_dl