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redo_prebinding - redo the prebinding of an executable or dynamic library
redo_prebinding [-c | -p | -d] [-i] [-z] [-r rootdir] [-e executable_path] [-seg_addr_ta-
ble table_file_name] [-seg_addr_table_filename pathname] [-o output_file] input_file
Redo_prebinding is used to redo the prebinding of an executable or dynamic library when
one of the dependent dynamic libraries changes. The input file, executable or dynamic
library, must have initially been prebound for this program to redo the prebinding. Also
all depended libraries must have their prebinding up to date. So when redoing the pre-
binding for libraries they must be done in dependency order. Also when building executa-
bles or dynamic libraries that are to be prebound (with the -prebind options to ld(1) or
libtool(1)) the dependent libraries must have their prebinding up to date or the result
will not be prebound.
The options allow for different types of checking for use in shell scripts. Only one of
-c, -p or -d can be used at a time. If redo_prebinding redoes the prebinding on an input
file it will run /usr/bin/objcunique if it exists on the result.
-c only check if the file needs to have it's prebinding redone and return status. A 0
exit means the file's prebinding is up to date, 1 means it needs to be redone and 2
means it could not be checked for reasons like a dependent library is missing (an
error message is printed in these cases).
-p check only for prebound files and return status. An exit status of 1 means the
file is a Mach-O that could have been prebound and is not otherwise the exit status
-d check only for dynamic shared library files and return status. An exit status of 0
means the file is a dynamic shared library, 1 means the file is not, 2 means there
is some mix in the architectures.
-i ignore non-prebound files (useful when running on all types of files).
-z zero out the prebind check sum in the output if it has one.
replace any dependent library's "@executable_path" prefix with the executable_path
The -seg_addr_table option is used when the input a dynamic library and if speci-
fied the table entry for the install_name of the dynamic library is used for check-
ing and the address to relocate the library to as it prefered address.
Use pathname instead of the install name of the library for matching an entry in
the segment address table.
prepend the rootdir argument to all dependent libraries.
write the updated file into output_file rather than back into the input file.
With no -c, -p or -d an exit status of 0 means success and 2 means it could not be done
for reasons like a dependent library is missing (an error message is printed in these
cases). And exit of 3 is for the specific case when the dependent libraries are out of
date with respect to each other.
Apple Computer, Inc. September 10, 2001 REDO_PREBINDING(1)
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