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#!/usr/bin/awk -f
################################################################
#
# Program Name : xusers
# Date Created : 02-27-97
# Author : Dan A. Mercer
# Email : damercer@mmm.com
# :
# Description : Print list of users and applications signed on
# : X workstations
################################################################
# standard help message
function help(hlpmsg) {
basename = ARGV[0]
sub(/.*\//,"",basename)
printf "Format: %s [o=[hi]] [s=cdlp] [pattern]\n", basename
print "Print list of users and applications signed on X workstations"
print "NOTE: applicationname is truncated to 9 chars"
print "Arguments:"
print " o=[h|i] - Options"
print " h - help - print this message"
print " i - case insensitive pattern search"
print " s=[c|d|l|p] - Sort Options"
print " c - sort by command"
print " d - sort by display name"
print " l - sort by login name"
print " p - sort by pid"
print " pattern - regex pattern to search commands against"
if (length(hlpmsg)) print hlpmsg
exit
}
BEGIN {
# process command line
for (i=1;i<ARGC;i++) {
if (ARGV[i] ~ /^o=/) {
if (options)
help("duplicate option string")
options = ARGV[i]
sub(/^o=/,"",options)
if (options !~ /^[hi]$/)
help("Invalid options " options)
if ("h" == options)
help("")
else
igncase = 1
}
else if (ARGV[i] ~ /^s=/) {
if (sortorder)
help("duplicate sort order string")
sortorder = ARGV[i]
sub(/^s=/,"",sortorder)
if (sortorder !~ /^[cdlp]$/)
help("Invalid sort order: '" sortorder "'")
if ("p" == sortorder) {
sort = "sort -kn2"
}
else if ("c" == sortorder) {
# the 'b' option means ignore leading blanks
sort = "sort -kb3"
}
else if ("l" == sortorder) {
sort = "sort -kb1"
}
else {
sort = "sort -kb4"
}
}
else {
if (pattern)
help("duplicate pattern string")
pattern = ARGV[i]
}
}
# default is to sort by pid
sort = (sort) ? sort : "sort -kn2"
# check for igncase
if (pattern && igncase)
pattern = tolower(pattern)
# set default pattern
pattern = (pattern) ? pattern : ".*"
cmd = "lsof -FpLcn -awP -iTCP:6000"
# ||||| |||| |
# ||||| |||| X servers use port 6000
# ||||| |||don't list port names
# ||||| ||suppress warning messages
# ||||| |and all conditions
# ||||| |options
# |||||
# ||||Internet addresses
# |||command name
# ||login name
# |process id
# Format string
# Output consists of one record per pid, followed by newline
# delimited fields for command, Login name, and network address
# The pid is preceded by a 'p', command by a 'c',
# Login name by an L, and network connection by an 'n'. There may
# be multiple 'n' entries (for instance for vuewm)
while ((cmd | getline field) > 0) {
type = substr(field,1,1)
sub("^.","",field)
if ("p" == type) {
# always output first
pid = field
PID[pid] = ++ct
}
else if ("c" == type) {
# always output second
XAPPL[pid] = field
}
else if ("L" == type) {
# always output fourth
USER[pid] = field
}
else if ("n" == type) {
# may be multiple instances - we just use the last
gsub(".*->|:6000","",field)
DPY[pid] = field
}
}
close(cmd)
printf "%8s %5s %-9s %s\n","USER","PID","COMMAND","DISPLAY"
for (pid in PID) {
if (((igncase) ? tolower(XAPPL[pid]) : XAPPL[pid]) ~ pattern)
printf "%8s %5d %-9s %s\n", USER[pid],pid,XAPPL[pid],DPY[pid] | sort
}
close(sort)
exit
}