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shellancestry.gv
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shellancestry.gv
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digraph shells {
{
edge [ style = invis; ]
node [ shape = plaintext; ]
1971 -> "1975-1977" -> 1978 -> 1979 -> 1983 -> "1987-1989" -> 1990 -> 1993 -> 1995 -> 1996 ->1999 -> 2002 -> 2005 -> 2006;
}
edge [ style = solid; ]
node [ shape = box; ]
/*
Proprietary licenses
*/
node [ style=filled, color=chartreuse ];
{ rank = same; 1971; "Thompson shell"; }
{ rank = same; "1975-1977"; "PWB shell"; }
{ rank = same; 1978; "Bourne shell"; }
{ rank = same; "1990" ; rc; }
{ rank = same; 1983; "KornShell"; }
{ rank = same; "1987-1989"; "ksh88"; }
{ rank = same; 1993; "ksh93"; }
/*
Open, free, public licenses
*/
node [ style=filled, color=plum ];
{ rank = same; 1978; "C shell"; }
{ rank = same; "1987-1989"; "BRL shell"; }
{ rank = same; 1978; "Forsyth shell"; }
{ rank = same; 1983; tcsh; }
{ rank = same; "1987-1989"; "Almquist shell"; }
{ rank = same; 2005; "ksh93q"; }
{ rank = same; 2002; dash; }
{ rank = same; "1987-1989"; pdksh; }
{ rank = same; "1987-1989"; Bash; }
{ rank = same; 1993; es; }
{ rank = same; 1990; zsh; }
{ rank = same; 1995; dtksh; }
{ rank = same; 1996; tksh; }
{ rank = same; 1999; BusyBox; }
{ rank = same; 2002; mksh; }
{ rank = same; 2006; toybox; }
{ rank = same; 1996; "OpenBSD ksh"; }
/*
Uses source code from
*/
edge [ style = solid; color = black; ];
"Bourne shell" -> "Thompson shell";
"BusyBox" -> "Almquist shell";
"KornShell" -> "Bourne shell";
"OpenBSD ksh" -> "pdksh";
"PWB shell" -> "Thompson shell";
"dash" -> "Almquist shell";
"dtksh" -> "ksh93";
"ksh88" -> "KornShell";
"ksh93" -> "KornShell";
"ksh93q" -> "ksh93";
"mksh" -> "pdksh";
"pdksh" -> "BRL shell";
"pdksh" -> "Forsyth shell";
"rc" -> "Bourne shell";
"tcsh" -> "C shell";
"tksh" -> "ksh93";
/*
Influenced by/clean reimplementation of
*/
edge [ style = dashed; color = grey; ];
"pdksh" -> ksh88;
"zsh" -> KornShell;
"zsh" -> tcsh;
"Forsyth shell" -> "Bourne shell" ;
"Bash" -> "Bourne shell";
"Almquist shell" -> "Bourne shell";
"C shell" -> "Thompson shell";
"es" -> "rc";
"toybox" -> "BusyBox";
"toybox" -> "Bash"
}