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#!/bin/ash ##############################################################
#
# COMMON HELPER FUNCTIONS
#
#########################################################################
#
# Function to drop a debug shell with an error message.
#
# Usage:
# drop_shell "This is your error message."
#
drop_shell() {
if [ -n "$MUTED_OUTPUT" ]; then
exec 1>&4 2>&5
reset
fi
[ $# -gt 0 ] && echo "$*"
if [ "x$SPLASH" != "x0" ]; then
echo "System halted. If you want to spawn a debug shell, select"
echo "debug mode in the boot menu."
echo ""
echo "Press any key to reboot."
read -t 1 -s -n 999999 BLA
read -n 1 -s BLA
echo b > /proc/sysrq-trigger
exit 1
fi
echo "CTRL + D will continue booting."
setsid sh -c 'exec sh </dev/tty1 >/dev/tty1 2>&1'
}
#########################################################################
#
# Helper function to download given FILE_URL from servers in 'slxsrv'
# as given through the kernel command line. File will be saved under TARGET_PATH
#
# Usage:
# download FILE_URL TARGET_PATH
#
# Example:
# download "config" "/opt/openslx/config"
#
# Note:
# FILE_URL can have subpath, e.g. "ubuntu-13.04-x64/config"
#
download() {
[ $# -ne 2 ] && echo "Error - 'download' requires 2 arguments, $# given." && return 1
if [ -z "$SLX_KCL_SERVERS" ]; then
if ! [ -s "/opt/openslx/config" ]; then
echo "Don't have any servers to download from."
elif ! . "/opt/openslx/config"; then
echo "Error - could not source '/opt/openslx/config'"
fi
fi
local FILE_URL="$1"
local TARGET_PATH="$2"
# Shuffle server list
local SERVERS=$(for SERVER in $SLX_CONFIG_SERVERS $SLX_KCL_SERVERS; do echo "$RANDOM $SERVER"; done | sort -u | sed -r 's/^[0-9]+ //')
for TIMEOUT in 1 1 2 END; do
for SERVER in $SERVERS; do
rm -f -- "${TARGET_PATH}"
wget -T 5 -q -O "$TARGET_PATH" "http://${SERVER}/${FILE_URL}"
RET=$?
if [ "x$RET" != "x0" -o ! -e "$TARGET_PATH" ]; then
echo "Error - downloading 'http://$SERVER/$FILE_URL' via wget failed. Exit Code: $RET"
usleep 50000 # 50ms
else
echo "Successfully downloaded 'http://${SERVER}/$FILE_URL'."
return 0
fi
done
[ "$TIMEOUT" = "END" ] && break
echo "Trying again in $(($TIMEOUT * 250)) ms..."
usleep $(($TIMEOUT * 250000))
done
# Max retries reached, no success :-(
return 1
}
# Add benchmark event to var, including uptime as prefix
bench_event() {
bench_result="${bench_result}$(cut -f 1 -d ' ' "/proc/uptime") $@
"
}
# mini tarcopy <3
# tarcopy <source_dir> <target_dir>
tarcopy() {
[ -d "$1" -a -d "$2" ] || return 1
cd "$1"
find . \! -type d > /tmp/tctmp
tar -c -p -T /tmp/tctmp | tar -xp -C "$2"
rm -f -- /tmp/tctmp
cd - &>/dev/null
}
run_hooks () {
[ -d "/inc/${1}.d" ] || return 0
local i
for i in "/inc/${1}.d/"*; do
[ -f "$i" ] && . "$i"
done
return 0
}
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