CGI/1.0 test script report:

argc is 0. argv is .
$0 = test-cgi
$1 =
$2 =
$3 =

SERVER_SOFTWARE = Apache/2.4
SERVER_NAME = homepages.inf.ed.ac.uk
GATEWAY_INTERFACE = CGI/1.1
SERVER_PROTOCOL = HTTP/1.1
SERVER_PORT = 443
REQUEST_METHOD = GET
HTTP_ACCEPT = */*
PATH_INFO = 
PATH_TRANSLATED = 
SCRIPT_NAME = /~neilb/test-cgi
QUERY_STRING = 
REMOTE_HOST =
REMOTE_ADDR = 18.218.84.153
REMOTE_USER =
AUTH_TYPE =
CONTENT_TYPE =
CONTENT_LENGTH =
USER =
HOME =
DOCUMENT_ROOT = /public/homepages/homepages-data/web
DOCUMENT_URI =
whoami = neilb
UID = 26289
EUID = 26289
id = uid=26289(neilb) gid=10000(people) groups=10000(people),98(lcfg),10010(staff),10012(tutor),10022(sysman),10023(cs1adm),10052(hase),10055(ito),10063(aiai),10101(room3421),10103(copier),10104(techs),10105(schooloffice),10114(aied),10125(repadmin),10160(cvs_dice),10356(cvs_dice_locks),10543(touchscreens),10625(edinnlp),10629(condaadmin),10652(services-unit),10658(pkgforge-user),10659(lcfgdiffs),10888(examprep)
not_using_ssl = Not Set

OK here's the lot ...

BASH=/bin/bash
BASHOPTS=checkwinsize:cmdhist:complete_fullquote:extquote:force_fignore:globasciiranges:hostcomplete:interactive_comments:progcomp:promptvars:sourcepath
BASH_ALIASES=()
BASH_ARGC=()
BASH_ARGV=()
BASH_CMDS=()
BASH_LINENO=([0]="0")
BASH_SOURCE=([0]="test-cgi")
BASH_VERSINFO=([0]="5" [1]="1" [2]="16" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
BASH_VERSION='5.1.16(1)-release'
CONTEXT_DOCUMENT_ROOT=/disk/homewikipages/homepages/neilb/cgi
CONTEXT_PREFIX=/~neilb
DIRSTACK=()
DOCUMENT_ROOT=/public/homepages/homepages-data/web
EUID=26289
GATEWAY_INTERFACE=CGI/1.1
GROUPS=()
HOSTNAME=bahookieuj.inf.ed.ac.uk
HOSTTYPE=x86_64
HTTPS=on
HTTP_ACCEPT='*/*'
HTTP_ACCEPT_ENCODING='gzip, br, zstd, deflate'
HTTP_HOST=homepages.inf.ed.ac.uk
HTTP_NB_VAR=OneTwoThree
HTTP_SCRIPT_NAME=/cgi/neilb/test-cgi
HTTP_USER_AGENT='Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)'
HTTP_X_NEILB='i am here'
IFS=$' \t\n'
MACHTYPE=x86_64-pc-linux-gnu
OPTERR=1
OPTIND=1
OSTYPE=linux-gnu
PATH=/usr/local/bin:/usr/bin:/bin
PIPESTATUS=([0]="0")
PPID=3204591
PS4='+ '
PWD=/disk/homewikipages/homepages/neilb/cgi
QUERY_STRING=
REMOTE_ADDR=18.218.84.153
REMOTE_PORT=23106
REQUEST_METHOD=GET
REQUEST_SCHEME=https
REQUEST_URI=/cgi/neilb/test-cgi
SCRIPT_FILENAME=/disk/homewikipages/homepages/neilb/cgi/test-cgi
SCRIPT_NAME=/~neilb/test-cgi
SCRIPT_URI=https://homepages.inf.ed.ac.uk/cgi/neilb/test-cgi
SCRIPT_URL=/cgi/neilb/test-cgi
SERVER_ADDR=129.215.32.113
SERVER_ADMIN=webadmin@inf.ed.ac.uk
SERVER_NAME=homepages.inf.ed.ac.uk
SERVER_PORT=443
SERVER_PROTOCOL=HTTP/1.1
SERVER_SIGNATURE=$'<address>Apache/2.4 Server at homepages.inf.ed.ac.uk Port 443</address>\n'
SERVER_SOFTWARE=Apache/2.4
SHELL=/bin/bash
SHELLOPTS=braceexpand:hashall:interactive-comments:noglob
SHLVL=1
SSL_TLS_SNI=homepages.inf.ed.ac.uk
TERM=dumb
UID=26289
UNIQUE_ID=ZqTred7-WibrParvocs1_QAAABA
_=echo

And here`s STDIN


A Java test:
openjdk version "18.0.2-ea" 2022-07-19
OpenJDK Runtime Environment (build 18.0.2-ea+9-Ubuntu-222.04)
OpenJDK 64-Bit Server VM (build 18.0.2-ea+9-Ubuntu-222.04, mixed mode, sharing)