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contrib/dhcpcd/hooks/dhcpcd-run-hooks.in
- This file was added.
#!/bin/sh | |||||
# dhcpcd client configuration script | |||||
# Handy variables and functions for our hooks to use | |||||
ifname="$interface${protocol+.}$protocol" | |||||
from=from | |||||
signature_base="# Generated by dhcpcd" | |||||
signature="$signature_base $from $ifname" | |||||
signature_base_end="# End of dhcpcd" | |||||
signature_end="$signature_base_end $from $ifname" | |||||
state_dir=@RUNDIR@/dhcpcd | |||||
_detected_init=false | |||||
: ${if_up:=false} | |||||
: ${if_down:=false} | |||||
: ${syslog_debug:=false} | |||||
# Ensure that all arguments are unique | |||||
uniqify() | |||||
{ | |||||
result= | |||||
for i do | |||||
case " $result " in | |||||
*" $i "*);; | |||||
*) result="$result${result:+ }$i";; | |||||
esac | |||||
done | |||||
echo "$result" | |||||
} | |||||
# List interface config files in a directory. | |||||
# If dhcpcd is running as a single instance then it will have a list of | |||||
# interfaces in the preferred order. | |||||
# Otherwise we just use what we have. | |||||
list_interfaces() | |||||
{ | |||||
ifaces= | |||||
for i in $interface_order; do | |||||
for x in "$1"/$i.*; do | |||||
[ -f "$x" ] && ifaces="$ifaces${ifaces:+ }${x##*/}" | |||||
done | |||||
done | |||||
for x in "$1"/*; do | |||||
[ -f "$x" ] && ifaces="$ifaces${ifaces:+ }${x##*/}" | |||||
done | |||||
uniqify $ifaces | |||||
} | |||||
# Trim function | |||||
trim() | |||||
{ | |||||
var="$*" | |||||
var=${var#"${var%%[![:space:]]*}"} | |||||
var=${var%"${var##*[![:space:]]}"} | |||||
if [ -z "$var" ]; then | |||||
# So it seems our shell doesn't support wctype(3) patterns | |||||
# Fall back to sed | |||||
var=$(echo "$*" | sed -e 's/^[[:space:]]*//;s/[[:space:]]*$//') | |||||
fi | |||||
printf %s "$var" | |||||
} | |||||
# We normally use sed to extract values using a key from a list of files | |||||
# but sed may not always be available at the time. | |||||
key_get_value() | |||||
{ | |||||
key="$1" | |||||
shift | |||||
if type sed >/dev/null 2>&1; then | |||||
sed -n "s/^$key//p" $@ | |||||
else | |||||
for x do | |||||
while read line; do | |||||
case "$line" in | |||||
"$key"*) echo "${line##$key}";; | |||||
esac | |||||
done < "$x" | |||||
done | |||||
fi | |||||
} | |||||
# We normally use sed to remove markers from a configuration file | |||||
# but sed may not always be available at the time. | |||||
remove_markers() | |||||
{ | |||||
m1="$1" | |||||
m2="$2" | |||||
in_marker=0 | |||||
shift; shift | |||||
if type sed >/dev/null 2>&1; then | |||||
sed "/^$m1/,/^$m2/d" $@ | |||||
else | |||||
for x do | |||||
while read line; do | |||||
case "$line" in | |||||
"$m1"*) in_marker=1;; | |||||
"$m2"*) in_marker=0;; | |||||
*) [ $in_marker = 0 ] && echo "$line";; | |||||
esac | |||||
done < "$x" | |||||
done | |||||
fi | |||||
} | |||||
# Compare two files. | |||||
comp_file() | |||||
{ | |||||
[ -e "$1" ] && [ -e "$2" ] || return 1 | |||||
if type cmp >/dev/null 2>&1; then | |||||
cmp -s "$1" "$2" | |||||
elif type diff >/dev/null 2>&1; then | |||||
diff -q "$1" "$2" >/dev/null | |||||
else | |||||
# Hopefully we're only working on small text files ... | |||||
[ "$(cat "$1")" = "$(cat "$2")" ] | |||||
fi | |||||
} | |||||
# Compare two files. | |||||
# If different, replace first with second otherwise remove second. | |||||
change_file() | |||||
{ | |||||
if [ -e "$1" ]; then | |||||
if comp_file "$1" "$2"; then | |||||
rm -f "$2" | |||||
return 1 | |||||
fi | |||||
fi | |||||
cat "$2" > "$1" | |||||
rm -f "$2" | |||||
return 0 | |||||
} | |||||
# Compare two files. | |||||
# If different, copy or link depending on target type | |||||
copy_file() | |||||
{ | |||||
if [ -h "$2" ]; then | |||||
[ "$(readlink "$2")" = "$1" ] && return 1 | |||||
ln -sf "$1" "$2" | |||||
else | |||||
comp_file "$1" "$2" && return 1 | |||||
cat "$1" >"$2" | |||||
fi | |||||
} | |||||
# Save a config file | |||||
save_conf() | |||||
{ | |||||
if [ -f "$1" ]; then | |||||
rm -f "$1-pre.$interface" | |||||
cat "$1" > "$1-pre.$interface" | |||||
fi | |||||
} | |||||
# Restore a config file | |||||
restore_conf() | |||||
{ | |||||
[ -f "$1-pre.$interface" ] || return 1 | |||||
cat "$1-pre.$interface" > "$1" | |||||
rm -f "$1-pre.$interface" | |||||
} | |||||
# Write a syslog entry | |||||
syslog() | |||||
{ | |||||
lvl="$1" | |||||
if [ "$lvl" = debug ]; then | |||||
${syslog_debug} || return 0 | |||||
fi | |||||
[ -n "$lvl" ] && shift | |||||
[ -n "$*" ] || return 0 | |||||
case "$lvl" in | |||||
err|error) echo "$interface: $*" >&2;; | |||||
*) echo "$interface: $*";; | |||||
esac | |||||
if type logger >/dev/null 2>&1; then | |||||
logger -i -p daemon."$lvl" -t dhcpcd-run-hooks "$interface: $*" | |||||
fi | |||||
} | |||||
# Check for a valid name as per RFC952 and RFC1123 section 2.1 | |||||
valid_domainname() | |||||
{ | |||||
name="$1" | |||||
[ -z "$name" ] || [ ${#name} -gt 255 ] && return 1 | |||||
while [ -n "$name" ]; do | |||||
label="${name%%.*}" | |||||
[ -z "$label" ] || [ ${#label} -gt 63 ] && return 1 | |||||
case "$label" in | |||||
-*|_*|*-|*_) return 1;; | |||||
*[![:alnum:]_-]*) return 1;; | |||||
"$name") return 0;; | |||||
esac | |||||
name="${name#*.}" | |||||
done | |||||
return 0 | |||||
} | |||||
valid_domainname_list() | |||||
{ | |||||
for name do | |||||
valid_domainname "$name" || return $? | |||||
done | |||||
return 0 | |||||
} | |||||
# With the advent of alternative init systems, it's possible to have | |||||
# more than one installed. So we need to try and guess what one we're | |||||
# using unless overriden by configure. | |||||
detect_init() | |||||
{ | |||||
_service_exists="@SERVICEEXISTS@" | |||||
_service_cmd="@SERVICECMD@" | |||||
_service_status="@SERVICESTATUS@" | |||||
[ -n "$_service_cmd" ] && return 0 | |||||
if $_detected_init; then | |||||
[ -n "$_service_cmd" ] | |||||
return $? | |||||
fi | |||||
# Detect the running init system. | |||||
# As systemd and OpenRC can be installed on top of legacy init | |||||
# systems we try to detect them first. | |||||
status="@STATUSARG@" | |||||
: ${status:=status} | |||||
if [ -x /bin/systemctl ] && [ -S /run/systemd/private ]; then | |||||
_service_exists="/bin/systemctl --quiet is-enabled \$1.service" | |||||
_service_status="/bin/systemctl --quiet is-active \$1.service" | |||||
_service_cmd="/bin/systemctl \$2 \$1.service" | |||||
elif [ -x /usr/bin/systemctl ] && [ -S /run/systemd/private ]; then | |||||
_service_exists="/usr/bin/systemctl --quiet is-enabled \$1.service" | |||||
_service_status="/usr/bin/systemctl --quiet is-active \$1.service" | |||||
_service_cmd="/usr/bin/systemctl \$2 \$1.service" | |||||
elif [ -x /sbin/rc-service ] && | |||||
{ [ -s /libexec/rc/init.d/softlevel ] || | |||||
[ -s /run/openrc/softlevel ]; } | |||||
then | |||||
_service_exists="/sbin/rc-service -e \$1" | |||||
_service_cmd="/sbin/rc-service \$1 -- -D \$2" | |||||
elif [ -x /usr/sbin/invoke-rc.d ]; then | |||||
_service_exists="/usr/sbin/invoke-rc.d --query --quiet \$1 start >/dev/null 2>&1 || [ \$? = 104 ]" | |||||
_service_cmd="/usr/sbin/invoke-rc.d \$1 \$2" | |||||
elif [ -x /sbin/service ]; then | |||||
_service_exists="/sbin/service \$1 >/dev/null 2>&1" | |||||
_service_cmd="/sbin/service \$1 \$2" | |||||
elif [ -x /usr/sbin/service ]; then | |||||
_service_exists="/usr/sbin/service \$1 $status >/dev/null 2>&1" | |||||
_service_cmd="/usr/sbin/service \$1 \$2" | |||||
elif [ -x /bin/sv ]; then | |||||
_service_exists="/bin/sv status \$1 >/dev/null 2>&1" | |||||
_service_cmd="/bin/sv \$2 \$1" | |||||
elif [ -x /usr/bin/sv ]; then | |||||
_service_exists="/usr/bin/sv status \$1 >/dev/null 2>&1" | |||||
_service_cmd="/usr/bin/sv \$2 \$1" | |||||
elif [ -e /etc/slackware-version ] && [ -d /etc/rc.d ]; then | |||||
_service_exists="[ -x /etc/rc.d/rc.\$1 ]" | |||||
_service_cmd="/etc/rc.d/rc.\$1 \$2" | |||||
_service_status="/etc/rc.d/rc.\$1 status >/dev/null 2>&1" | |||||
else | |||||
for x in /etc/init.d/rc.d /etc/rc.d /etc/init.d; do | |||||
if [ -d $x ]; then | |||||
_service_exists="[ -x $x/\$1 ]" | |||||
_service_cmd="$x/\$1 \$2" | |||||
_service_status="$x/\$1 $status >/dev/null 2>&1" | |||||
break | |||||
fi | |||||
done | |||||
if [ -e /etc/arch-release ]; then | |||||
_service_status="[ -e /var/run/daemons/\$1 ]" | |||||
elif [ "$x" = "/etc/rc.d" ] && [ -e /etc/rc.d/rc.subr ]; then | |||||
_service_status="$x/\$1 check >/dev/null 2>&1" | |||||
fi | |||||
fi | |||||
_detected_init=true | |||||
if [ -z "$_service_cmd" ]; then | |||||
syslog err "could not detect a useable init system" | |||||
return 1 | |||||
fi | |||||
return 0 | |||||
} | |||||
# Check a system service exists | |||||
service_exists() | |||||
{ | |||||
if [ -z "$_service_exists" ]; then | |||||
detect_init || return 1 | |||||
fi | |||||
eval $_service_exists | |||||
} | |||||
# Send a command to a system service | |||||
service_cmd() | |||||
{ | |||||
if [ -z "$_service_cmd" ]; then | |||||
detect_init || return 1 | |||||
fi | |||||
eval $_service_cmd | |||||
} | |||||
# Send a command to a system service if it is running | |||||
service_status() | |||||
{ | |||||
if [ -z "$_service_cmd" ]; then | |||||
detect_init || return 1 | |||||
fi | |||||
if [ -n "$_service_status" ]; then | |||||
eval $_service_status | |||||
else | |||||
service_command $1 status >/dev/null 2>&1 | |||||
fi | |||||
} | |||||
# Handy macros for our hooks | |||||
service_command() | |||||
{ | |||||
service_exists $1 && service_cmd $1 $2 | |||||
} | |||||
service_condcommand() | |||||
{ | |||||
service_exists $1 && service_status $1 && service_cmd $1 $2 | |||||
} | |||||
# We source each script into this one so that scripts run earlier can | |||||
# remove variables from the environment so later scripts don't see them. | |||||
# Thus, the user can create their dhcpcd.enter/exit-hook script to configure | |||||
# /etc/resolv.conf how they want and stop the system scripts ever updating it. | |||||
for hook in \ | |||||
@SYSCONFDIR@/dhcpcd.enter-hook \ | |||||
@HOOKDIR@/* \ | |||||
@SYSCONFDIR@/dhcpcd.exit-hook | |||||
do | |||||
for skip in $skip_hooks; do | |||||
case "$hook" in | |||||
*/*~) continue 2;; | |||||
*/"$skip") continue 2;; | |||||
*/[0-9][0-9]"-$skip") continue 2;; | |||||
*/[0-9][0-9]"-$skip.sh") continue 2;; | |||||
esac | |||||
done | |||||
if [ -f "$hook" ]; then | |||||
. "$hook" | |||||
fi | |||||
done |