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-rw-r--r--packages/openslug-init/openslug-init-0.10/functions261
1 files changed, 261 insertions, 0 deletions
diff --git a/packages/openslug-init/openslug-init-0.10/functions b/packages/openslug-init/openslug-init-0.10/functions
index e69de29bb2..ac8e195abd 100644
--- a/packages/openslug-init/openslug-init-0.10/functions
+++ b/packages/openslug-init/openslug-init-0.10/functions
@@ -0,0 +1,261 @@
+# . this file to load the following utility functions
+#
+# mtdev "name"
+# return (output) the character device name for flash parition "name"
+# /proc/mtd has the general form:
+# dev: size erasesize name
+# mtd5: 00020000 00020000 "FIS directory"
+# use this rather than hard-wiring the device because the partition
+# table can change - looking in /proc/mtd is more reliable.
+mtdev(){
+ sed -n 's!^\(mtd[0-9][0-9]*\):[^"]*"'"$1"'"$!/dev/\1!p' /proc/mtd
+}
+#
+# mtblockdev "name"
+# as mtdev but output the name of the block (not character) device
+mtblockdev(){
+ sed -n 's!^mtd\([0-9][0-9]*\):[^"]*"'"$1"'"$!/dev/mtdblock\1!p' /proc/mtd
+}
+#
+# mtsize "name"
+# the size of the partition as a hexadecimal value (with 0x at the front)
+mtsize(){
+ sed -n 's!^mtd[0-9][0-9]*: \([^ ]*\)[^"]*"'"$1"'"$!0x\1!p' /proc/mtd
+}
+#
+# sysvalmatch "section" "name" 'pattern' "configuration file"
+# sysvalof "section" "name" "configuration file"
+# sysval "section" "name"
+# outputs the value of the SysConf variable 'name' from section 'section',
+# this is a bit gross, when it gets a match it copies the value to the
+# hold space, if no match it jumps over the copy, at the end ($) it copies
+# the hold space to the pattern space and prints the result, thus it only
+# ever prints the last match
+# BUG FIX: busybox sed doesn't initialise the hold space and crashes if it
+# is used before initialisation, so temporarily this script does it's own
+# tail by hand.
+# NOTE: these functions should only be used internally, add entries to 'config'
+# below if necessary. This is because 'config' does the defaulting and in the
+# recovering case (zero or absent SysConf) /etc/default/sysconf only contains
+# the hw_addr entry!
+sysvalmatch(){
+ # sed -n '/^\['"$1"'\]$/,/^\[.*\]$/s/^'"$2"'=\('"$3"'\)$/\1/;tH;bE;:H;h;:E;$g;$p' "$4"
+ sed -n '/^\['"$1"'\]$/,/^\[.*\]$/s/^'"$2"'=\('"$3"'\)$/\1/p' "$4" | sed -n '$p'
+}
+sysvalof(){
+ sysvalmatch "$1" "$2" '.*' "$3"
+}
+sysval(){
+ sysvalof "$1" "$2" /etc/default/sysconf
+}
+#
+# config "value"
+# convenience callers for specific values to avoid mis-typing in scripts
+# NOTE: this function does the defaulting, 'sysval' does not! Validity
+# of the sysconf file is determined by the presence of the all important
+# hw_addr.
+config(){
+ local mac
+ mac=
+ test -r /etc/default/sysconf &&
+ mac="$(sysvalmatch network hw_addr '[0-9A-Za-z][0-9A-Za-z]:[0-9A-Za-z][0-9A-Za-z]:[0-9A-Za-z][0-9A-Za-z]:[0-9A-Za-z][0-9A-Za-z]:[0-9A-Za-z][0-9A-Za-z]:[0-9A-Za-z][0-9A-Za-z]' /etc/default/sysconf)"
+ if test -n "$mac"
+ then
+ case "$1" in
+ mac) echo "$mac";;
+ host) if test -n "$(sysval network disk_server_name)"
+ then
+ sysval network disk_server_name
+ elif test -n "$(sysval network default_server_name)"
+ then
+ sysval network default_server_name
+ else
+ echo "$mac" | sed -n 's/^..:..:..:\(..\):\(..\):\(..\)$/LKG\1\2\3/p'
+ fi;;
+ domain) sysval network w_d_name;;
+ iface) if test -n "$(sysval network lan_interface)"
+ then
+ sysval network lan_interface
+ else
+ echo eth0
+ fi;;
+ ip) if test -n "$(sysval network ip_addr)"
+ then
+ sysval network ip_addr
+ else
+ echo 192.168.1.77
+ fi;;
+ netmask)sysval network netmask;;
+ gateway)sysval network gateway;;
+ dns) sysval network dns_server1;;
+ dns2) sysval network dns_server2;;
+ dns3) sysval network dns_server3;;
+ boot) if test -n "$(sysval network bootproto)"
+ then
+ sysval network bootproto
+ else
+ echo dhcp
+ fi;;
+ valid) return 0;;
+ *) return 1;;
+ esac
+ else
+ # These are the defaults for an invalid mac address, use the compiled
+ # in hardware address.
+ case "$1" in
+ mac) echo "00:02:B3:02:02:01";;
+ host) echo "brokenslug";;
+ iface) echo eth0;;
+ ip) echo 192.168.1.77;;
+ boot) echo dhcp;;
+ *) return 1;;
+ esac
+ fi
+}
+#
+# checkif "iface"
+# Validate an interface name by making sure that it exists
+# in /proc/net/dev (and is not lo). The listing outputs the
+# interface followed by a :, the check function looks for
+# something of the form '$1[a-zA-Z0-9]*:' and outputs the
+# part preceding the ':'
+checkif(){
+ sed -n '/^[ ]*lo:/d;s/^[ ]*\('"$1"'[a-zA-Z0-9]*\):.*$/\1/p;tE;d;:E;q' /proc/net/dev
+}
+#
+# checkmount "mountpoint"
+# tests an already mounted mountpoint to see whether to attempt to
+# boot with this as root. Returns success if it appears ok.
+checkmount(){
+ # basic test for init (the kernel will try to load this)
+ # but require a shell in bin/sh and no .recovery too
+ test \( ! -f "$1/.recovery" \) -a \
+ \( -d "$1/initrd" -o -d "$1/mnt" \) -a \
+ \( -x "$1/bin/sh" -o -h "$1/bin/sh" \) -a \
+ \( -x "$1/sbin/init" -o -h "$1/sbin/init" -o \
+ -x "$1/etc/init" -o -h "$1/etc/init" -o \
+ -x "$1/bin/init" -o -h "$1/bin/init" \)
+}
+#
+# swivel "new root" "old root"
+# NOTE: the arguments must be paths relative to /, bad things
+# will happen if the arguments themselves start with /
+# Pivot to a new root. This does all the fancy pivot_root stuff
+# including closing streams and does a umount /proc - it doesn't
+# matter if this fails (failure codes are ignored), but if /proc
+# was mounted it must be restored by the caller on return.
+# Normally this function never returns!
+# On return 0,1,2 are connected to /dev/console - this may not
+# have been true before!
+swivel() {
+ cd "$1"
+ exec <&- >&- 2>&-
+ # This is just-in-case the called mounted /proc and was
+ # unable to close it because of the streams
+ umount /proc 2>/dev/null
+ if pivot_root . "$2"
+ then
+ # everything must move out of the old root, this process
+ # is $2/bin/sh so it must die, IO is redirected
+ # just in case - typically it will be to a device so it
+ # won't hold the old root open.
+ # the exec here is the first point at which the old root
+ # is unused - before the exec regardless of the close of
+ # 0,1,2 above ash still has *this* shell script open!
+ # (it's on fd 10).
+ # init closes all file descriptors, there's no point
+ # supplying it with fds.
+ exec "$2/usr/sbin/chroot" . bin/sh -c "\
+ test -x sbin/init && exec sbin/init
+ test -x etc/init && exec etc/init
+ test -x bin/init && exec bin/init
+ leds -A +gr1 '!g1'
+ sleep 10 >/.recovery
+ sync;sync;sync
+ exit 1"
+ fi
+ #
+ # recovery - must restore the old root
+ cd "$2"
+ sbin/pivot_root . "$1"
+ # cd is back to $1 - either pivot_root doesn't change it and the
+ # chroot above was not executed, or pivot_root does change it and
+ # has just changed it back!
+ exec <>/dev/console >&0 2>&0
+}
+#
+# ifup "interface"
+# bring that interface up with the configured ip and other
+# information
+ifup(){
+ local ip hostname router subnet iface HOSTNAME NETMASK BROADCAST
+
+ iface="$1"
+ ip="$(config ip)"
+ hostname="$(config host)"
+ router="$(config gateway)"
+ broadcast=
+
+ if test -n "$ip"
+ then
+ # only if an ip was specified
+ subnet="$(config netmask)"
+ else
+ ip=192.168.1.77
+ fi
+
+ # First try udhcpc - note that the /boot/udhcpc.script
+ # simply records the values returned and the udhcpc
+ # is not left running so this will only work for
+ # the lease length time!
+ ifconfig "$iface" up
+ test -n "$hostname" && HOSTNAME="-H $hostname"
+ # The script writes the required shell variable assignments
+ # to file descriptor 9
+ eval $(udhcpc -i "$iface" -n -q -r "$ip" $HOSTNAME -s /boot/udhcpc.script 9>&1 >/dev/null)
+
+ test -n "$broadcast" && BROADCAST="broadcast $broadcast"
+ test -n "$subnet" && NETMASK="netmask $subnet"
+
+ if ifconfig "$iface" "$ip" $NETMASK $BROADCAST
+ then
+ for route in $router
+ do
+ route add default gw "$route" dev "$iface"
+ done
+ return 0
+ else
+ ifconfig "$iface" down
+ return 1
+ fi
+}
+#
+# ifdown "interface"
+# take the interface down
+ifdown(){
+ ifconfig "$1" down
+}
+#
+# mountflash "flash root directory" {mount options}
+# Finds and mounts the flash file system on the given directory
+mountflash() {
+ local ffsdev ffsdir
+
+ ffsdir="$1"
+ test -n "$ffsdir" -a -d "$ffsdir" || {
+ echo "$0: mountflash $ffsdir: not a directory (internal error)" >&2
+ return 1
+ }
+ shift
+
+ ffsdev="$(mtblockdev Flashdisk)"
+ test -n "$ffsdev" -a -b "$ffsdev" || {
+ echo "$0: unable to find flash file system to copy ($ffsdev)" >&2
+ return 1
+ }
+ mount -t jffs2 "$@" "$ffsdev" "$ffsdir" || {
+ echo "$0: $ffsdev: unable to mount flash file system on $ffsdir" >&2
+ return 1
+ }
+ return 0
+}