Solaris ksh variations

Today i have read, and in the parallel - discovered, that Solaris has got three ksh variants.
Two of them are ksh88, and one ksh93.

$ grep -i ver /usr/bin/ksh /usr/xpg4/bin/sh /usr/dt/bin/dtksh
/usr/bin/ksh:@(#)Version M-11/16/88i
/usr/xpg4/bin/sh:@(#)Version M-11/16/88i
/usr/dt/bin/dtksh:@(#)Version M-12/28/93d
/usr/dt/bin/dtksh:@(#)Version M-12/28/93
/usr/dt/bin/dtksh:@(#)Version 12/28/93

The standard one - /usr/bin/ksh, and a POSIX-compliant veriant of ksh88 - /usr/xpg4/bin/sh.
Both of them are the components of SUNWcsu (Core Solaris (Usr)) package.
dtksh comes from SUNWdtbas.

$ ls -li /usr/bin/ksh /usr/xpg4/bin/sh /usr/dt/bin/dtksh
       489 -r-xr-xr-x   3 root     bin       171412 Aug  7 13:27 /usr/bin/ksh
     26709 -r-xr-xr-x   1 root     bin       620144 Jan 23  2005 /usr/dt/bin/dtksh
      1536 -r-xr-xr-x   1 root     bin       171412 Aug  7 13:27 /usr/xpg4/bin/sh
$ file /usr/bin/ksh /usr/xpg4/bin/sh /usr/dt/bin/dtksh
/usr/bin/ksh:   ELF 32-bit LSB executable 80386 Version 1, dynamically linked, stripped
/usr/xpg4/bin/sh:       ELF 32-bit LSB executable 80386 Version 1, dynamically linked, stripped
/usr/dt/bin/dtksh:      ELF 32-bit LSB executable 80386 Version 1, dynamically linked, not stripped, no debugging information available

As you can already saw (on the ls -li listing) there are also the three brothers-in-inode:

# ls -li /usr/bin/*ksh
       489 -r-xr-xr-x   3 root     bin       171412 Aug  7 13:27 /usr/bin/ksh
       489 -r-xr-xr-x   3 root     bin       171412 Aug  7 13:27 /usr/bin/pfksh
       489 -r-xr-xr-x   3 root     bin       171412 Aug  7 13:27 /usr/bin/rksh

It's the highest inode count from all of the Solaris shells (10u8, SUNWCall), the second place goes to csh with only two file names binded to its inode.

Fascinating.