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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).
       -V, --version
              Output version information and exit.
       --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).
       --4gb  Ignored (for backward compatibility only).
       --list List architectures that can be set.
       -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 AT redhat.com>
       Jindrich Novy <jnovy AT redhat.com>
AVAILABILITY
       The setarch command is part of the util-linux package and is  available
       from  Linux  Kernel Archive <ftp://ftp.kernel.org/pub/linux/utils/util-
       linux/>.

util-linux                      September 2011                      SETARCH(8)