99 lines
2.2 KiB
Bash
99 lines
2.2 KiB
Bash
#!/bin/ksh
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# OpenBSD equivalent-ish to:
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#
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# Linux: netstat -tulpn
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#
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# Shows listening TCP sockets and UDP sockets together with
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# the process using the socket when fstat can identify it.
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#
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# Best run as root for complete process information.
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printf "%-5s %-7s %-8s %-22s %-22s %s\n" \
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"PROTO" "PID" "USER" "LOCAL ADDRESS" "FOREIGN ADDRESS" "PROCESS"
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printf "%-5s %-7s %-8s %-22s %-22s %s\n" \
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"-----" "-------" "--------" "----------------------" \
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"----------------------" "-------"
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# ------------------------------------------------------------
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# TCP listening sockets
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# ------------------------------------------------------------
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netstat -an -f inet 2>/dev/null |
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awk '$1 ~ /^tcp/ && $6 == "LISTEN" {
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print $1, $4, $5
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}' |
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while read proto local foreign
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do
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# Extract port from local address.
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port="${local##*.}"
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# Try to find the process owning this socket.
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owner="$(
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fstat 2>/dev/null |
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awk -v port="$port" '
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$0 ~ ("\\*:" port "([^0-9]|$)") ||
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$0 ~ ("\\." port "([^0-9]|$)") {
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print $1, $2, $3
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exit
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}
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'
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)"
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if [ -n "$owner" ]; then
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set -- $owner
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user="$1"
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process="$2"
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pid="$3"
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else
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user="-"
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process="-"
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pid="-"
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fi
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printf "%-5s %-7s %-8s %-22s %-22s %s\n" \
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"$proto" "$pid" "$user" "$local" "$foreign" "$process"
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done
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# ------------------------------------------------------------
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# UDP sockets
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# ------------------------------------------------------------
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netstat -an -f inet 2>/dev/null |
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awk '$1 ~ /^udp/ {
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print $1, $4, $5
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}' |
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while read proto local foreign
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do
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port="${local##*.}"
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owner="$(
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fstat 2>/dev/null |
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awk -v port="$port" '
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$0 ~ ("\\*:" port "([^0-9]|$)") ||
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$0 ~ ("\\." port "([^0-9]|$)") {
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print $1, $2, $3
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exit
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}
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'
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)"
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if [ -n "$owner" ]; then
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set -- $owner
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user="$1"
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process="$2"
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pid="$3"
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else
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user="-"
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process="-"
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pid="-"
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fi
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printf "%-5s %-7s %-8s %-22s %-22s %s\n" \
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"$proto" "$pid" "$user" "$local" "$foreign" "$process"
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done
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