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'echo' +"'\ @ goto dos \ [exit[if {[lsearch -exact [package names] Expect]>=0} {puts expect\ [\ package require Expect]\ (Tcl\ [info patchlevel])} elseif {[lsearch -exact [\ package names] Tk]>=0} {puts wish\ (Tcl\ [info patchlevel],\ Tk\ [package \ require Tk])} else {puts tcl\ [info patchlevel]}]]' >/dev/null ' {\">/dev/null \ ">"/dev/null" +"\'";q='''=.q,';q=%[\" echo ">/dev/null;status=0;@ {status=1};*=(" '$' ");~ $status 1&&{e='"\ "';eval catch $2 ^'&version {eval ''echo <='^ $2 ^'&version''}';exit};e='"\ "';if (eval '{let ''a^~a''} >[2] /dev/null'){e='"\ "';exec echo akanga};eval exec echo rc $2 ^ version;\" > /dev/null : #;echo possibly pre-Bourne UNIX V1-6 shell;exit if { bindkey >& /dev/null } then exec echo $version else exec echo csh endif : dos @echo off cls echo %OS% %COMSPEC% goto fin ", unless eval 'printf "perl %vd\n",$^V;exit;'> "/dev/null";eval ': "\''; =S"' : 'This script aims at recognizing all Bourne compatible shells. Emphasis is on shells without any version variables. Please comment to mascheck@in-ulm.de' : '$Id: whatshell.sh,v 1.26 2018/02/18 23:38:06 xmascheck Exp xmascheck $' : 'fixes are tracked on www.in-ulm.de/~mascheck/various/whatshell/' LC_ALL=C; export LC_ALL : 'trivial cases first, yet parseable for historic shells' case $BASH_VERSION in *.*) { echo "bash $BASH_VERSION";exit;};;esac case $ZSH_VERSION in *.*) { echo "zsh $ZSH_VERSION";exit;};;esac case "$VERSION" in *zsh*) { echo "$VERSION";exit;};;esac case "$SH_VERSION" in *PD*) { echo "$SH_VERSION";exit;};;esac case "$KSH_VERSION" in *PD*|*MIRBSD*) { echo "$KSH_VERSION";exit;};;esac case "$POSH_VERSION" in 0.[1234]|0.[1234].*) \ { echo "posh $POSH_VERSION, possibly slightly newer, yet<0.5";exit;} ;; *.*|*POSH*) { echo "posh $POSH_VERSION";exit;};; esac case $YASH_VERSION in *.*) { echo "yash $YASH_VERSION";exit;};;esac : 'traditional Bourne shell' (eval ': $(:)') 2>/dev/null || { case `(:^times) 2>&1` in *0m*):;; *)p=' (and pipe check for Bourne shell failed)';;esac : 'pre-SVR2: no functions, no echo built-in.' (eval 'f(){ echo :; };f') >/dev/null 2>&1 || { ( eval '# :' ) 2>/dev/null || { echo '7th edition Bourne shell'"$p";exit;} ( : ${var:=value} ) 2>/dev/null || { echo '7th edition Bourne shell, # comments (BSD, or port)'"$p";exit;} set x x; shift 2;test "$#" != 0 && { echo 'System III Bourne shell'"$p";exit;} { echo 'SVR1 Bourne shell'"$p";exit;} } }; : 'keep syntactical block small for pre-SVR2' myex(){ echo "$@";exit;} # "exec echo" might call the external command (eval ': $(:)') 2>/dev/null || { (set -m; set +m) 2>/dev/null && { priv=0;(priv work)>/dev/null 2>&1 && case `(priv work)2>&1` in *built*|*found*) priv=1;;esac read_r=0;(echo|read -r dummy 2>/dev/null) && read_r=1 a_read=0;unset var;set -a;read var <&-;case `export` in *var*) a_read=1;;esac case_in=0;(eval 'case x in in) :;;esac')2>/dev/null && case_in=1 ux=0;a=`(notexistent_cmd) 2>&1`; case $a in *UX*) ux=1;;esac case $priv$ux$read_r$a_read$case_in in 11110) myex 'SVR4.2 MP2 Bourne shell' ;; 11010) myex 'SVR4.2 Bourne shell' ;; 10010|01010) myex 'SVR4.x Bourne shell (between 4.0 and 4.2)' ;; 00111) myex 'SVR4 Bourne shell (SunOS 5 schily variant, before 2016-02-02)' ;; 00101) myex 'SVR4 Bourne shell (SunOS 5 heirloom variant)' ;; 00001) myex 'SVR4 Bourne shell (SunOS 5 variant)' ;; 00000) myex 'SVR4.0 Bourne shell' ;; *) myex 'unknown SVR4 Bourne shell variant' ;;esac } r=0; case `(read) 2>&1` in *"missing arguments"*) r=1;;esac g=0; (set -- -x; getopts x var) 2>/dev/null && g=1 case $r$g in 11) myex 'SVR3 Bourne shell' ;; 10) myex 'SVR3 Bourne shell (but getopts built-in is missing)' ;; 01) myex 'SVR3 Bourne shell (but read built-in does not match)' ;; 00) (builtin :) >/dev/null 2>&1 && myex '8th edition (SVR2) Bourne shell'"$p" (type :) >/dev/null 2>&1 && myex 'SVR2 Bourne shell'"$p" || myex 'SVR2 shell (but type built-in is missing)'"$p" ;;esac } case $( (:^times) 2>&1) in *0m*) case `eval '(echo $((1+1))) 2>/dev/null'` in 2) myex 'SVR4 Bourne shell (SunOS 5 schily variant, posix-like, since 2016-05-24)' ;;*) myex 'SVR4 Bourne shell (SunOS 5 schily variant, since 2016-02-02, before 2016-05-24)' ;;esac ;;esac type -F >/dev/null 2>&1 && myex 'SVR4 Bourne shell (SunOS 5 schily variant, since 2016-08-08, in posix mode)' # Almquist shell aka ash (typeset -i var) 2>/dev/null || { case $SHELLVERS in "ash 0.2") myex 'original ash';;esac test "$1" = "debug" && debug=1 n=1; case `(! :) 2>&1` in *not*) n=0;;esac b=1; case `echo \`:\` ` in '`:`') b=0;;esac g=0; { set -- -x; getopts x: var case $OPTIND in 2) g=1;;esac;} >/dev/null 2>&1 p=0; (eval ': ${var#value}') 2>/dev/null && p=1 r=0; ( (read</dev/null)) 2>/dev/null; case $? in 0|1|2) var=`(read</dev/null)2>&1`; case $var in *arg*) r=1;;esac ;;esac v=1; set x; case $10 in x0) v=0;;esac t=0; (PATH=;type :) >/dev/null 2>&1 && t=1 test -z "$debug" || echo debug '$n$b$g$p$r$v$t: ' $n$b$g$p$r$v$t case $n$b$g$p$r$v$t in 00*) myex 'early ash (4.3BSD, 386BSD 0.0-p0.2.3/NetBSD 0.8)' ;; 010*) myex 'early ash (ash-0.2 port, Slackware 2.1-8.0,'\ '386BSD p0.2.4, NetBSD 0.9)' ;; 1110100) myex 'early ash (Minix 2.x-3.1.2)' ;; 1000000) myex 'early ash (4.4BSD Alpha)' ;; 1100000) myex 'early ash (4.4BSD)' ;; 11001*) myex 'early ash (4.4BSD Lite, early NetBSD 1.x, BSD/OS 2.x)' ;; 1101100) myex 'early ash (4.4BSD Lite2, BSD/OS 3 ff)' ;; 1101101) myex 'ash (FreeBSD -10.x, Cygwin pre-1.7, Minix 3.1.3 ff)' ;; 1111101) myex 'ash (FreeBSD 11.0 ff)' ;; esac e=0; case `(PATH=;exp 0)2>&1` in 0) e=1;;esac n=0; case y in [^x]) n=1;;esac r=1; case `(PATH=;noexist 2>/dev/null) 2>&1` in *not*) r=0 ;; *file*) r=2 ;;esac f=0; case `eval 'for i in x;{ echo $i;}' 2>/dev/null` in x) f=1;;esac test -z "$debug" || echo debug '$e$n$r$a$f: ' $e$n$r$a$f case $e$n$r$f in 1100) myex 'ash (dash 0.3.8-30 - 0.4.6)' ;; 1110) myex 'ash (dash 0.4.7 - 0.4.25)' ;; 1010) myex 'ash (dash 0.4.26 - 0.5.2)' ;; 0120|1120|0100) myex 'ash (Busybox 0.x)' ;; 0110) myex 'ash (Busybox 1.x)' ;;esac a=0; case `eval 'x=1;(echo $((x)) )2>/dev/null'` in 1) a=1;;esac x=0; case `f(){ echo $?;};false;f` in 1) x=1;;esac c=0; case `echo -e '\x'` in *\\x) c=1;;esac test -z "$debug" || echo debug '$e$n$r$f$a$x$c: ' $e$n$r$f$a$x$c case $e$n$r$f$a$x$c in 1001010) myex 'ash (Slackware 8.1 ff, dash 0.3.7-11 - 0.3.7-14)' ;; 10010??) myex 'ash (dash 0.3-1 - 0.3.7-10, NetBSD 1.2 - 3.1/4.0)' ;; 10011*) myex 'ash (NetBSD 3.1/4.0 ff)' ;; 00101*) myex 'ash (dash 0.5.5.1 ff)' ;; 00100*) myex 'ash (dash 0.5.3-0.5.5)' ;; *) myex 'unknown ash' ;;esac } savedbg=$! # save unused $! for a later check # Korn shell ksh93, $KSH_VERSION not implemented before 93t' # protected: fatal substitution error in non-ksh ( eval 'test "x${.sh.version}" != x' ) 2>/dev/null & wait $! && { eval 'PATH=;case $(XtInitialize 2>&1) in Usage*) DTKSH=" (dtksh/CDE variant)";;esac myex "ksh93 ${.sh.version}${DTKSH}"'; } # Korn shell ksh86/88 _XPG=1;test "`typeset -Z2 x=0; echo $x`" = '00' && { case `print -- 2>&1` in *"bad option"*) myex 'ksh86 Version 06/03/86(/a)';; esac test "$savedbg" = '0'&& myex 'ksh88 Version (..-)11/16/88 (1st release)' test ${x-"{a}"b} = '{ab}' && myex 'ksh88 Version (..-)11/16/88a' case "`for i in . .; do echo ${i[@]} ;done 2>&1`" in "subscript out of range"*) myex 'ksh88 Version (..-)11/16/88b or c' ;; esac test "`whence -v true`" = 'true is an exported alias for :' && myex 'ksh88 Version (..-)11/16/88d' test "`(cd /dev/null 2>/dev/null; echo $?)`" != '1' && myex 'ksh88 Version (..-)11/16/88e' test "`(: $(</file/notexistent); echo x) 2>/dev/null`" = '' && myex 'ksh88 Version (..-)11/16/88f' case `([[ "-b" > "-a" ]]) 2>&1` in *"bad number"*) \ myex 'ksh88 Version (..-)11/16/88g';;esac # fixed in OSR5euc test "`cd /dev;cd -P ..;pwd 2>&1`" != '/' && myex 'ksh88 Version (..-)11/16/88g' # fixed in OSR5euc test "`f(){ typeset REPLY;echo|read;}; echo dummy|read; f; echo $REPLY`" = "" && myex 'ksh88 Version (..-)11/16/88h' test $(( 010 )) = 8 && myex 'ksh88 Version (..-)11/16/88i (posix octal base)' myex 'ksh88 Version (..-)11/16/88i' } echo 'oh dear, unknown shell. mascheck@in-ulm.de would like to know this' ] print "ruby ",RUBY_VERSION,"\n";exit;' ''' import sys;print "python",sys.version;z='\ : fin } '
Comments to Sven Mascheck <mascheck@in-ulm.de>
<http://www.in-ulm.de/~mascheck/various/whatshell/which_interpreter_ext.html>