DL::Handle

Type:

Class

Constants:

NEXT : Document-const

A predefined pseudo-handle of RTLD_NEXT

Which will find the next occurrence of a function in the search order after the current library.

DEFAULT : Document-const

DEFAULT

A predefined pseudo-handle of RTLD_DEFAULT

Which will find the first occurrence of the desired symbol using the default library search order

The DL::Handle is the manner to access the dynamic library

Example

Setup

libc_so = "/lib64/libc.so.6"
=> "/lib64/libc.so.6"
@handle = DL::Handle.new(libc_so)
=> #<DL::Handle:0x00000000d69ef8>

Setup, with flags

libc_so = "/lib64/libc.so.6"
=> "/lib64/libc.so.6"
@handle = DL::Handle.new(libc_so, DL::RTLD_LAZY | DL::RTLD_GLOBAL)
=> #<DL::Handle:0x00000000d69ef8>

Addresses to symbols

strcpy_addr = @handle['strcpy']
=> 140062278451968

strcpy_addr = @handle.sym('strcpy')
=> 140062278451968

close_enabled?

close_enabled? Instance Public methods Returns true if dlclose()

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new

initialize(lib = nil, flags = DL::RTLD_LAZY | DL::RTLD_GLOBAL) Class Public methods Create

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sym 2

sym(name) Instance Public methods Document-method:

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[]

sym(name) Class Public methods Get the address as an

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[] 2

sym(name) Instance Public methods Get the address as an

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enable_close

enable_close Instance Public methods Enable a call to dlclose() when this

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sym

sym(name) Class Public methods Document-method:

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to_i

to_i Instance Public methods Returns the memory address for this handle.

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close Instance Public methods Close this

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disable_close

disable_close Instance Public methods Disable a call to dlclose() when this

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