SETARCH


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SETARCH

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLES
AUTHOR
AVAILABILITY

NAME

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

SYNOPSIS

setarch arch [options] [program [arguments]]

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 can be set.

−−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

("mailto:sopwith@redhat.com") Elliot Lee
("mailto:jnovy@redhat.com") Jindrich Novy

AVAILABILITY

The setarch command is part of the util-linux package and is available from ("ftp://ftp.kernel.org/pub/linux/utils/util-linux/") Linux Kernel Archive.







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