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SETARCH(8)		     System Administration		    SETARCH(8)

NAME
       setarch	-  change reported architecture in new program environment and
       set personality flags

SYNOPSIS
       setarch arch [options] [program [arguments]]
       arch [options] [program [arguments]]

DESCRIPTION
       setarch This utility currently only affects the output of uname -m. For
       example,	 on an AMD64 system, running 'setarch i386 program' will cause
       'program' to see i686 (or other relevant arch)  instead	of  x86_64  as
       machine	type.  It  also allows to set various personality options. The
       default program is /bin/sh.

OPTIONS
       -v, --verbose
	      Be verbose.

       -h, --help
	      Display help (it is also displayed when setarch takes  no	 argu‐
	      ments).

       --uname-2.6
	      Causes the program to see a kernel version number beginning with
	      2.6.

       -3, --3gb
	      Specifies that processes should use a maximum of 3GB of  address
	      space on systems where it is supported (ADDR_LIMIT_3GB).

       -B, --32bit
	      Turns on ADDR_LIMIT_32BIT.

       -F, --fdpic-funcptrs
	      Userspace	 function  pointers  point  to	descriptors  (turns on
	      FDPIC_FUNCPTRS).

       -I, --short-inode
	      Turns on SHORT_INODE.

       -L, --addr-compat-layout
	      Changes the way  virtual	memory	is  allocated  (turns  on  the
	      ADDR_COMPAT_LAYOUT).

       -R, --addr-no-randomize
	      Disables	randomization  of  the virtual address space (turns on
	      ADDR_NO_RANDOMIZE).

       -S, --whole-seconds
	      Turns on WHOLE_SECONDS.

       -T, --sticky-timeouts
	      Turns on STICKY_TIMEOUTS.

       -X --read-implies-exec
	      Turns on READ_IMPLIES_EXEC.

       -Z, mmap-page-zero
	      Turns on MMAP_PAGE_ZERO.

EXAMPLES
       setarch ppc32 rpmbuild --target=ppc --rebuild foo.src.rpm
       setarch ppc32 -v -vL3 rpmbuild --target=ppc --rebuild bar.src.rpm
       setarch ppc32 --32bit rpmbuild --target=ppc --rebuild foo.src.rpm

AUTHOR
       Elliot Lee <sopwith@redhat.com>
       Jindrich Novy <jnovy@redhat.com>

AVAILABILITY
       The setarch command is part of the util-linux package and is  available
       from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

util-linux			   June 2007			    SETARCH(8)
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