zfs code - Dec 2007 - /usr/bin and /usr/xpg4/bin differences

Hello,
        I am working on open solaris bugs .. and need to change the code of df
in the above two folders..

I would like to know why there are two df''s with diff options in the
respective folders..
/usr/bin/df is different is from /usr/xpg4/bin/df!!

Why is it so?? What is this xpg4 represent?


Thanks,
Sasidhar.
--
This messages posted from opensolaris.org

KASTURI VENKATA SESHA SASIDHAR wrote:
> Hello,
>         I am working on open solaris bugs .. and need to change the code of
df in the above two folders..
> 
> I would like to know why there are two df''s with diff options in
the respective folders..
> /usr/bin/df is different is from /usr/xpg4/bin/df!!
> 
> Why is it so?? What is this xpg4 represent?
because of: standards(5)

<snip>
   Utilities
      If the behavior required by POSIX.2, POSIX.2a, XPG4, SUS, or
      SUSv2  conflicts  with  historical Solaris utility behavior,
      the original Solaris version of the utility is unchanged;  a
      new version that is standard-conforming has been provided in
      /usr/xpg4/bin. If the behavior required by  POSIX.1-2001  or
      SUSv3  conflicts with historical Solaris utility behavior, a
      new version that is standard-conforming has been provided in
      /usr/xpg4/bin  or in /usr/xpg6/bin. If the behavior required
      by POSIX.1-2001 or SUSv3 conflicts with  POSIX.2,  POSIX.2a,
      SUS,  or  SUSv2,  a  new  version  that  is  SUSv3 standard-
      conforming has been provided in /usr/xpg6/bin.


      An application that wants to use standard-conforming  utili-
      tues  must  set  the PATH (sh(1) or ksh(1)) or path (csh(1))
      environment variable to specify the directories listed below
      in the order specified to get the appropriate utilities:

      SVID3, XPG3
              1.   /usr/ccs/bin

              2.   /usr/bin

              3.   directory containing binaries for your compiler

              4.   other directories containing binaries needed by
                   the application

     POSIX.2, POSIX.2a, SUS, SUSv2, XPG4
              1.   /usr/xpg4/bin

              2.   /usr/ccs/bin

              3.   /usr/bin

              4.   directory containing binaries for your compiler

              5.   other directories containing binaries needed by
                   the application

<snip end>

---
frankB