setarch(8)
NAME
setarch - change reported architecture in new program environment and
set personality flags
SYNOPSIS
setarch arch [options] [program [argument...]]
arch [options] [program [argument...]]
setarch --list|-h|-V
DESCRIPTION
setarch currently only affects the output of uname -m. For example, on
an AMD64 system, running setarch i386 program will cause program to see
i686 instead of x86_64 as the machine type. It also allows to set
various personality options. The default program is /bin/sh.
OPTIONS
--list List the architectures that setarch knows about. Whether
setarch can actually set each of these architectures depends on
the running kernel.
--uname-2.6
Causes the program to see a kernel version number beginning with
2.6.
-v, --verbose
Be verbose.
-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).
-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.
-V, --version
Display version information and exit.
-h, --help
Display help text and exit.
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 Linux Kernel Archive ⟨ftp://ftp.kernel.org/pub/linux/utils/util-
linux/⟩.
Free and Open Source Software