Home Explore Blog CI



man-pages

18th chunk of `unzip.man`
0b312ee27d648e86819e7eda3296bedd34a15af5b0cf54470000000100000933
 (‘‘overwrite all’’) option is given.  This is a limitation of the
       operating system; because directories only have a creation time  associ‐
       ated with them, unzip has no way to determine whether the stored attrib‐
       utes are newer or older than those on disk.  In practice this may mean a
       two‐pass  approach is required:  first unpack the archive normally (with
       or without freshening/updating existing files), then overwrite just  the
       directory entries (e.g., ‘‘unzip ‐o foo */’’).

       [VMS]  When  extracting  to another directory, only the [.foo] syntax is
       accepted for the -d option; the simple Unix foo syntax is  silently  ig‐
       nored (as is the less common VMS foo.dir syntax).

       [VMS]  When  the file being extracted already exists, unzip’s query only
       allows skipping, overwriting or renaming; there should additionally be a
       choice for creating a new version of the file.   In  fact,  the  ‘‘over‐
       write’’  choice  does create a new version; the old version is not over‐
       written or deleted.

SEE ALSO
       funzip(1), zip(1), zipcloak(1), zipgrep(1), zipinfo(1), zipnote(1), zip‐
       split(1)

URL
       The Info‐ZIP home page is currently at
       http://www.info‐zip.org/pub/infozip/
       or
       ftp://ftp.info‐zip.org/pub/infozip/ .

AUTHORS
       The primary Info‐ZIP authors (current semi‐active members  of  the  Zip‐
       Bugs  workgroup) are:  Ed Gordon (Zip, general maintenance, shared code,
       Zip64, Win32, Unix, Unicode); Christian Spieler (UnZip maintenance coor‐
       dination, VMS, MS‐DOS, Win32, shared code, general Zip and  UnZip  inte‐
       gration and optimization); Onno van der Linden (Zip); Mike White (Win32,
       Windows  GUI,  Windows  DLLs);  Kai  Uwe Rommel (OS/2, Win32); Steven M.
       Schweda (VMS, Unix, support  of  new  features);  Paul  Kienitz  (Amiga,
       Win32,  Unicode);  Chris  Herborth  (BeOS,  QNX, Atari); Jonathan Hudson
       (SMS/QDOS); Sergio Monesi (Acorn RISC OS); Harald Denker  (Atari,  MVS);
       John  Bush  (Solaris, Amiga); Hunter Goatley (VMS, Info‐ZIP Site mainte‐
       nance); Steve Salisbury (Win32); Steve Miller (Windows CE  GUI),  Johnny
       Lee (MS‐DOS, Win32, Zip64); and Dave Smith (Tandem

Title: UNZIP: Bugs and Limitations in VMS and Author Information
Summary
This section describes Unzip's limitations specific to the VMS operating system, including syntax requirements for directory extraction and how the 'overwrite' option creates new file versions instead of actually overwriting. The manual also lists related utilities like funzip, zip, and others. Finally, it provides the URL for the Info-ZIP home page and acknowledges the primary authors and contributors to the Info-ZIP project.