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arch(1)                          User Commands                         arch(1)



NAME
       arch - display the architecture of the current host

SYNOPSIS
       arch [-k | archname]

DESCRIPTION
       The  arch  utility displays the application architecture of the current
       host system. Due to extensive historical use of  this  command  without
       any  options,  all  SunOS 5.x SPARC based systems will return "sun4" as
       their application architecture. Use of this command is discouraged. See
       NOTES section below.

       Systems  can be broadly classified by their architectures, which define
       what executables will run on which machines. A distinction can be  made
       between kernel architecture and application architecture (or, commonly,
       just "architecture"). Machines that run different kernels due to under-
       lying hardware differences may be able to run the same application pro-
       grams.

OPTIONS
       -k       Displays the kernel architecture, such as sun4u.  This defines
                which  specific  SunOS kernel will run on the machine, and has
                implications only for  programs  that  depend  on  the  kernel
                explicitly (for example, ps(1)).



OPERANDS
       The following operand is supported:

       archname        Use archname to determine whether the application bina-
                       ries for this application architecture can run  on  the
                       current  host  system.  The   archname  must be a valid
                       application architecture, such as  sun4, i86pc, and  so
                       forth.

                       If  application  binaries  for  archname can run on the
                       current host system, TRUE (0) is  returned.  Otherwise,
                       FALSE (1) is returned.



EXIT STATUS
       The following exit values are returned:

       0        Successful completion.



       >>0       An error occurred.



ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:


       tab()     allbox;     cw(2.750000i)|    cw(2.750000i)    lw(2.750000i)|
       lw(2.750000i).  ATTRIBUTE TYPEATTRIBUTE VALUE AvailabilitySUNWcsu


SEE ALSO
       mach(1), ps(1), uname(1), attributes(5)

NOTES
       This command is provided for compatibility with previous  releases  and
       its  use is discouraged. Instead, the uname command is recommended. See
       uname(1) for usage information.



SunOS 5.10                        21 Oct 2002                          arch(1)