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scanmacho

scanmacho - user-space utility to scan Mach-O files

Synopsis

scanmacho [options] Mach-Os or directories

DESCRIPTION

scanmacho

is a user-space utility to quickly scan given Mach-Os, directories, or common system paths for different information. This may include Mach-O types, their install_names, etc...

Because Mach-O files can be "fat", it is possible for a single file to return multiple lines. Each line represents a single architecture, contained in the fat (universal) file. While there are no real restrictions, in practice, the entries can be distinguished by their arch type, e.g. ppc, ppc64, i386, x86_64, arm, ...

OPTIONS

-A, --archives

Scan archives (.a files)

-a, --all

Print all scanned info (-F"%o %O %D %b %F")

-B, --nobanner

Don't display the header

-b, --bind

Print flags from mach_header

-E, --etype filetype

Print only Mach-O files matching specified etype (like MH_EXECUTABLE, MH_DYLIB, etc...)

-F, --format FORMAT

Use specified format for output; see the FORMAT section

-f, --from FILE

Read input stream from specified filename

-g, --gmatch

Use strncmp to match libraries (use with -N). Or regexp with symbol matching

-h, --help

Show condensed usage and exit

-i, --interp

Print LC_LOAD_DYLINKER information

-M, --bits BITS

Print only Mach-O files matching specified numeric bits (like 32/64)

-D, --endian

Print Endianness

-O, --perms PERMS

Print only Mach-O files with matching specified octal bits (like 755)

-Z, --size SIZE

Print Mach-O file size

-m, --mount

Don't recursively cross mount points

-N, --lib INSTALLNAME

Find Mach-Os that need the specified INSTALL_NAME

-n, --needed

Print LC_LOAD_DYLIB information

-o, --file FILE

Write output stream to specified filename

-p, --path

Scan all directories in PATH environment

-q, --quiet

Only output 'bad' things.

-R, --recursive

Scan directories recursively

-S, --soname

Print install_name information

-V, --version

Print version and exit

-v, --verbose

Be verbose (can be used more than once)

-y, --symlink

Don't scan symlinks

FORMAT

The format string is much like a printf string in that it is a literal string with flags requesting different information. For example, you could use a format string and expect the following results.

 
 
   # scanmacho -BF 'file %f needs %n; funky time!' /bin/bash
   file bash needs /usr/lib/libncurses.5.4.dylib,/usr/lib/libSystem.B.dylib; funky time!
  
 

Note that when you use a format string, generally information related flags should be omitted. In other words, you do not want to try and request NEEDED output (-n) and try to specify a format output at the sametime as these operations are mutually exclusive. Each information related flag has an equivalent conversion specifier, so use those instead. You can of course continue to use non-information related flags (such as --verbose).

There are three characters that introduce conversion specifiers. • % - replace with info

•

# - silent boolean match

•

+ - verbose match

And there are a number of conversion specifiers. We try to match up the specifier with corresponding option. • a - arch type

•

b - mach_header flags

•

D - endian

•

F - long filename

•

f - short filename

•

i - dyld

•

M - CPU_TYPE class

•

N - specified needed

•

n - needed libraries

•

p - filename (minus search)

•

o - mh_type

•

O - perms

•

S - install_name

 

MACH-O FILETYPES

You can narrow your search by specifying the Mach-O object file type. The commandline option takes the symbolic type name. Multiple values can be passed comma separated. Example -E MH_EXECUTABLE,MH_DYLIB

Here is the normal list available for your pleasure. • MH_OBJECT - intermediate object file (.o)

•

MH_EXECUTE - standard executable program

•

MH_BUNDLE - dlopen plugin (.bundle)

•

MH_DYLIB - dynamic shared library (.dylib)

•

MH_PRELOAD - executable not loaded by Mac OS X kernel (ROM)

•

MH_CORE - program crash core file

•

MH_DYLINKER - dynamic linker shared library (dyld)

•

MH_DYLIB_STUB - shared library stub for static only, no sections

•

MH_DSYM - debug symbols file (in .dSYM dir)

MACH-O BITS

You can also narrow your search by specifying the Mach-O bitsize. Specify the numeric value. • 32 - 32bit mach_header

•

64 - 64bit mach_header_64

HOMEPAGE

http://hardened.gentoo.org/pax-utils.xml

REPORTING BUGS

Please include as much information as possible (using any available debugging options) and send bug reports to the maintainers (see the AUTHORS section).

SEE ALSO

chpax(1), dumpelf(1), paxctl(1), pspax(1), readelf(1), scanelf(1)

Authors

Ned Ludd <solar@gentoo.org>

Maintainer

Mike Frysinger <vapier@gentoo.org>

Maintainer

Fabian Groffen <grobian@gentoo.org>

Mach-O Maintainer