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RezDet(1)                                                            RezDet(1)




NAME

       RezDet - Resource Detective


SYNOPSIS

       RezDet resourceFile1 [resourceFile2]... [-b[ig]] [-useDF] [-noResolve]
       [-d[ump] | -l[ist] | -q[uiet] | -r[awdump] | -s[how] | -t[erse]]



DESCRIPTION

       RezDet tool investigates the resource fork of the specified files for
       damage or inconsistencies. Files are read and checked one at a time,
       and messages are generated for each error, indicating the cause of the
       damage.  In determining the source of the errors, RezDet checks that
       the files meet the following conditions:

       - The resource fork contains the minimum number of bytes (enough to
       read a resource header).

       - The header, resource data list, and resource map do not overlap or
       contain spaces between them. There should not be any bytes between the
       end-of-file marker and the end of the resource map.

       - Each record in the resource data list is used once and only once and
       the last data item ends exactly where the data list ends.

       - Each item in the resource type list contains at least one reference;
       each sequence of referenced items starts where the reference list for
       the previous resource type item ends; and each item in the reference
       list is pointed to by one and only one resource type list item.

       - The resource type list does not contain any duplicates.

       - Each name in the name list has one and only one reference, and the
       last name does not point outside the name list.

       - All names have a nonzero length.

       - The name list does not contain any duplicates. Note that duplicate
       names cause an advisory warning rather than a true error and that
       RezDet does not generate this warning unless you also specify the -d,
       -r, or -s options.

       - Each reference list item points to a valid data item and either has a
       name list offset of -1 or points to a valid name list offset.

       - Bits 7 (reserved) and 1 (changed) are not set in the resource
       attributes.

       Note:  RezDet does not use the Resource Manager and should not crash no
              matter how corrupt the resource fork of a file is.



INPUT

       One or more files (resourceFile). The RezDet tool does not read
       standard input.



OUTPUT

       Standard output.  RezDet writes error messages to diagnostic output. If
       you specify -d, -l, -r, -s, or -t, the information produced by that
       option is written to standard output.  Note: For the options in which
       additional information is retrieved, fields are displayed as
       hexadecimal or decimal numbers for numeric values, or as a hex dump
       with associated printable Macintosh characters.



STATUS

       RezDet can return the following status codes:

       0  no errors
       1  syntax error (invalid options or no files specified)
       2  resource format error
       3  fatal error--an I/O or program error



PARAMETERS

       resourceFile1 [ resourceFile2 ] ...
              Specifies one or more resource files to be checked.




OPTIONS

       -b[ig] Reads the data for each resource into memory one resource at a
              time, instead of all at once.  This is useful for checking huge
              resource files, such as the System file.

              Note: Try using this option if RezDet tells you that it ran out
              of memory or that memory is badly fragmented.

       -useDF Reads and writes resource information from the files' data
              forks, instead of their resource forks.

       -noResolve
              Prevents the resolution of leaf aliases in the input resource
              file path. This allows the resources in a Finder alias file to
              be checked.

       -d[ump]
              Generates the same information as the -s[how] option as well as
              detailed information about the resource header, type list, name
              list, resource map, and data list.

       -l[ist]
              Lists resource types, IDs, names, attributes, and resource
              sizes. Output appears in the following format: 'type' (ID, name,
              attributes) [size]

       -q[uiet]
              Returns a status code instead of generating error messages.

       -r[awdump]
              Generates the same information as the -d[ump] option but also
              dumps the contents of data blocks.

              Note: This option can generate huge amounts of output.

       -s[how]
              Writes information about individual resource types. For each
              type, RezDet provides the following information: the number of
              items of this type, the reference list offset, and detailed
              information on each ID (including the resource name, if any,
              resource attributes, data offset, and data length).

       -t[erse]
              Suppresses all messages that do not explicitly describe errors.
              Examples of such messages include the name of the current file
              and the statement that the file is OK in the event that no
              errors were found. Similar to the -q option, but allows error
              messages to display.



EXAMPLES

       The following command line checks the System file.

       RezDet "{SystemFolder}System" -big

       If the file is damaged, RezDet returns an error message such as this
       one:

       File "HD:System Folder:System"; ### RezDet -- Data inconsistency, 36
       bytes left over.

       The following command line removes the Test.c file if its resource fork
       is damaged.

       RezDet Test.c -q || Delete Test.c



LIMITATIONS

       The RezDet tool does not validate the file attributes field in the
       resource map header and ignores the Finder-specific fields in the
       header and resource map header.

       Duplicate resource name warnings are generated when you specify -d, -r,
       or -s, even if the names belong to resources of different types.



COPYRIGHT

       RezDet is Copyright (c) 1986-2002, 2002, 2005 by Apple Computer, Inc.



AUTHORS

       Johan Strandberg, Tom Taylor, Mitch Adler, Cheryl Ewy, and Greg
       Branche.



Mac OS X                       December 25, 2005                     RezDet(1)

Mac OS X 10.6 - Generated Thu Sep 17 20:07:06 CDT 2009
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