SETARCH
Section: Linux Programmer's Manual (8)
Updated: Jun 2007
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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 arguments).
- -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-ng package and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.