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fix(systemadmin): make the netstat fallback reachable

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Six helpers were written as `ss ... | awk ... || netstat ... | awk ...`.
A pipeline exits with its last command's status, so a missing ss still
ended in awk exiting 0 and the netstat branch never ran. On systems
without ss, sortcons, sortconip, req20, timewait20, syn20 and port_pro
printed nothing.

Each helper now picks ss or netstat by whether ss is installed. con80
gets the same shape so the file has one idiom and no longer prints
"command not found: ss" on the way to netstat. Where both backends
share the same columns, the awk program is written once.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This commit is contained in:
Robby Russell
2026-09-21 13:45:11 -07:00
co-authored by Claude Fable 5.1
parent e92273d8b6
commit beea7648bd
1 changed files with 36 additions and 25 deletions
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plugins/systemadmin/systemadmin.plugin.zsh
+36 -25
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@@ -65,37 +65,43 @@ fi
# Sort connection state
function sortcons() {
{
LANG= ss -nat | awk 'NR > 1 {print $1}' \
|| LANG= netstat -nat | awk 'NR > 2 {print $6}'
} | sort | uniq -c | sort -rn
if (( $+commands[ss] )); then
LANG= ss -nat | awk 'NR > 1 {print $1}'
else
LANG= netstat -nat | awk 'NR > 2 {print $6}'
fi | sort | uniq -c | sort -rn
}
# View all connections on the given ports (default 80 and 443)
function con80() {
local -a ports=($@)
(( $# )) || ports=(80 443)
{
LANG= ss -nat || LANG= netstat -nat
} | grep -E ":(${(j:|:)ports})[^0-9]" | wc -l
if (( $+commands[ss] )); then
LANG= ss -nat
else
LANG= netstat -nat
fi | grep -E ":(${(j:|:)ports})[^0-9]" | wc -l
}
# On the connected IP sorted by the number of connections
function sortconip() {
{
LANG= ss -ntu | awk 'NR > 1 {print $6}' \
|| LANG= netstat -ntu | awk 'NR > 2 {print $5}'
} | cut -d: -f1 | sort | uniq -c | sort -n
if (( $+commands[ss] )); then
LANG= ss -ntu | awk 'NR > 1 {print $6}'
else
LANG= netstat -ntu | awk 'NR > 2 {print $5}'
fi | cut -d: -f1 | sort | uniq -c | sort -n
}
# top20 of Find the number of requests on the given ports (default 80 and 443)
function req20() {
local -a ports=($@)
(( $# )) || ports=(80 443)
{
LANG= ss -tn | awk -v ports="${(j:|:)ports}" '$4 ~ ":("ports")$" {print $5}' \
|| LANG= netstat -tn | awk -v ports="${(j:|:)ports}" '$4 ~ ":("ports")$" {print $5}'
} | awk -F: '{print $1}' | sort | uniq -c | sort -nr | head -n 20
if (( $+commands[ss] )); then
LANG= ss -tn
else
LANG= netstat -tn
fi | awk -v ports="${(j:|:)ports}" '$4 ~ ":("ports")$" {print $5}' \
| awk -F: '{print $1}' | sort | uniq -c | sort -nr | head -n 20
}
# top20 of Using tcpdump to view access to the given ports (default 80 and 443)
@@ -107,24 +113,29 @@ function http20() {
# top20 of Find time_wait connection
function timewait20() {
{
LANG= ss -nat | awk 'NR > 1 && /TIME-WAIT/ {print $5}' \
|| LANG= netstat -nat | awk 'NR > 2 && /TIME_WAIT/ {print $5}'
} | sort | uniq -c | sort -rn | head -n 20
if (( $+commands[ss] )); then
LANG= ss -nat
else
LANG= netstat -nat
fi | awk '/TIME[-_]WAIT/ {print $5}' | sort | uniq -c | sort -rn | head -n 20
}
# top20 of Find SYN connection
function syn20() {
{
LANG= ss -an | awk '/SYN/ {print $5}' \
|| LANG= netstat -an | awk '/SYN/ {print $5}'
} | awk -F: '{print $1}' | sort | uniq -c | sort -nr | head -n20
if (( $+commands[ss] )); then
LANG= ss -an
else
LANG= netstat -an
fi | awk '/SYN/ {print $5}' | awk -F: '{print $1}' | sort | uniq -c | sort -nr | head -n20
}
# Printing process according to the port number
function port_pro() {
LANG= ss -ntlp | awk "NR > 1 && /:${1:-}/ {print \$6}" | sed 's/.*pid=\([^,]*\).*/\1/' \
|| LANG= netstat -ntlp | awk "NR > 2 && /:${1:-}/ {print \$7}" | cut -d/ -f1
if (( $+commands[ss] )); then
LANG= ss -ntlp | awk "NR > 1 && /:${1:-}/ {print \$6}" | sed 's/.*pid=\([^,]*\).*/\1/'
else
LANG= netstat -ntlp | awk "NR > 2 && /:${1:-}/ {print \$7}" | cut -d/ -f1
fi
}
# top10 of gain access to the ip address