setarch(8) - phpMan

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  personal-
       ity options. The default program is /bin/sh.

OPTIONS
       -v, --verbose
              Be verbose.

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

       -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)

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