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JUNZIP(1)                  OpenBSD Reference Manual                  JUNZIP(1)

NAME                                                                            
     junzip - ZIP archive testing, listing and extracting                       

SYNOPSIS                                                                        
     junzip [-t] [-t] zipfile                                                   
     junzip -l zipfile                                                          
     junzip -x [-d directory] zipfile [file ...]                                

DESCRIPTION                                                                     
     junzip is able to extract files from a ZIP archive with the option to      
     test the archive's integrity without extracting or to just list the con-
     tents.

     The flags -t, -l and -x change the behaviour of the command as follows:    

     -t      Tells junzip to test the ZIP archive.  This is the default action  
             if no other is given.  An additional -t increases the testing to   
             check the CRC values files by decompressing files to /dev/null.

     -l      Tells junzip to list the ZIP archive contents.                     

     -x      Tells junzip to extract files.                                     

     Other flags can be specified depending on which behaviour flag was given:

     -d directory                                                               
             Specifies where to output extracted files.  The current directory
             is the default.

SEE ALSO                                                                        
     unzip(1L), http://www.dryfish.org/projects/junzip.html

HISTORY                                                                         
     junzip was written entirely because a large (approaching 4GB) zipfile      
     created using WinZip was said to be corrupt but actually follows the
     specification which Info-Zip says it follows.

     Info-Zip can be found here: http://www.info-zip.org/pub/infozip/

BUGS                                                                            
     Probably only compiles under OpenBSD 3.x.

OpenBSD 2.7                    February 17, 2005                             1

Change Log

2005.03.29:
Debugging output with verbose level > 3.

2005.03.15:
Streaming extact able to skip over non matching archive members.

2005.03.08:
Extract from seekable files.
Extract and streaming extract.

2005.03.02:
Work with zip files tagged onto the end of other files.
Use linked list to store all local file header entries and then compare them
to central directory entries in order to make sure that they match up.

Check that end of central directory entry points to first central directory.

Tweak linked list code.
Linked list, might need it.
Let extract() decide if we can test or not.
Report failure to open /dev/null.

2005.02.17:
No point in GNUmakefile.

Extract zip framework, uses fnmatch to decide what to output.

scanzip() altered to take -1 as an offset meaning to search for end of
central directory from the end of the file -- this was in listzip.
Generic extraction routine which decides where to go from there (stored
extraction or inflation).

Means we've coded stored extraction though.
BSD Licence and Make.
Implement listzip by making scanzip accept a FILE* and offset.

2005.02.16:
Command line switches.

scanzip() more generic and calls callback functions for testing and listing.

Listing not coded.

Testing should check Central Directory matches up etc.
Undynamic output buffer.
Test inflate and compare crc32.
vis call which allocates memory.

Read in filename.
Inflate a file.
Scanner in C.


         

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