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contrib/dhcpcd/hooks/dhcpcd-run-hooks
- 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=/var/run/dhcpcd/hook-state | |||||
| _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 $? | |||||
| done | |||||
| return 0 | |||||
| } | |||||
| # With the advent of alternative init systems, it's possible to have | |||||
| # more than one installed. So we need to try to guess what one we're | |||||
| # using unless overridden by configure. | |||||
| detect_init() | |||||
| { | |||||
| _service_exists="" | |||||
| _service_cmd="" | |||||
| _service_status="" | |||||
| [ -n "$_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="onestatus" | |||||
| : ${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 \ | |||||
| /etc/dhcpcd.enter-hook \ | |||||
| /libexec/dhcpcd-hooks/* \ | |||||
| /etc/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 | |||||