ldd(1) - NetBSD Manual Pages

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LDD(1)                  NetBSD General Commands Manual                  LDD(1)


NAME

     ldd -- list dynamic object dependencies


SYNOPSIS

     ldd [-ov] [-f format] program ...


DESCRIPTION

     ldd displays all shared objects that are needed to run the given program.
     Contrary to nm(1), the list includes ``indirect'' dependencies that are
     the result of needed shared objects which themselves depend on yet other
     shared objects.  Zero, one or two -f options may be given.  The argument
     is a format string passed to rtld(1) and allows customization of ldd's
     output.  The first format argument is used for library objects and
     defaults to "\t-l%o.%m => %p\n".  The second format argument is used for
     non-library objects and defaults to "\t%o => %p\n".

     These arguments are interpreted as format strings a la printf(3) to cus-
     tomize the trace output and allow ldd to be operated as a filter more
     conveniently.  The following conversions can be used:

     %a    The main program's name (also known as ``__progname'').

     %A    The value of the environment variable
           LD_TRACE_LOADED_OBJECTS_PROGNAME in a.out and the program name from
           the argument vector from elf.

     %o    The library name.

     %m    The library's major version number.

     %n    The library's minor version number (a.out only, ignored in elf).

     %p    The full pathname as determined by rtld's library search rules.

     %x    The library's load address

     Additionally, \n and \t are recognized and have their usual meaning.

     The -o option is an alias for -f %a:-l%o.%m => %p\n, which makes ldd
     behave analogously to nm -o.

     The -v option turns on verbose mode.


EXIT STATUS

     The ldd utility exits 0 on success, and >0 if an error occurs.


SEE ALSO

     ld(1), ld.elf_so(1), nm(1), rtld(1)


HISTORY

     A ldd utility first appeared in SunOS 4.0, it appeared in its current
     form in NetBSD 0.9A.

NetBSD 10.1                    October 15, 2022                    NetBSD 10.1