-Z     zipinfo(1) mode.  If the first option on the command line is -Z, the remaining options  are  taken
       to be zipinfo(1) options.  See the appropriate manual page for a description of these options.

-A     [OS/2, Unix DLL] print extended help for the DLL's programming interface (API).

-c     extract files to stdout/screen (``CRT'').  This option is similar to the -p option except that the
       name of each file is printed as it is extracted,  the  -a  option  is  allowed,  and  ASCII-EBCDIC
       conversion  is  automatically  performed  if  appropriate.  This option is not listed in the unzip
       usage screen.

-f     freshen existing files, i.e., extract only those files that already exist on  disk  and  that  are
       newer than the disk copies.  By default unzip queries before overwriting, but the -o option may be
       used to suppress the  queries.   Note  that  under  many  operating  systems,  the  TZ  (timezone)
       environment variable must be set correctly in order for -f and -u to work properly (under Unix the
       variable is usually set automatically).  The reasons for this are somewhat subtle but have  to  do
       with  the  differences  between  DOS-format  file  times (always local time) and Unix-format times
       (always in GMT/UTC) and the necessity to compare the two.  A typical TZ value is  ``PST8PDT''  (US
       Pacific time with automatic adjustment for Daylight Savings Time or ``summer time'').

-l     list  archive files (short format).  The names, uncompressed file sizes and modification dates and
       times of the specified files are printed, along with totals for all files specified.  If UnZip was
       compiled  with  OS2_EAS  defined,  the  -l  option also lists columns for the sizes of stored OS/2
       extended attributes (EAs) and OS/2 access control lists (ACLs).  In addition, the zipfile  comment
       and  individual  file  comments (if any) are displayed.  If a file was archived from a single-case
       file system (for example, the old MS-DOS FAT file  system)  and  the  -L  option  was  given,  the
       filename is converted to lowercase and is prefixed with a caret (^).

-p     extract  files  to  pipe (stdout).  Nothing but the file data is sent to stdout, and the files are
       always extracted in binary format, just as they are stored (no conversions).

-t     test archive files.  This option extracts each specified file  in  memory  and  compares  the  CRC
       (cyclic  redundancy  check,  an  enhanced  checksum) of the expanded file with the original file's
       stored CRC value.

-T     [most OSes] set the timestamp on the archive(s) to that of the newest  file  in  each  one.   This
       corresponds  to zip's -go option except that it can be used on wildcard zipfiles (e.g., ``unzip -T
       \*.zip'') and is much faster.

-u     update existing files and create new ones if needed.  This option performs the  same  function  as
       the -f option, extracting (with query) files that are newer than those with the same name on disk,
       and in addition it extracts those files that do not already exist  on  disk.   See  -f  above  for
       information on setting the timezone properly.

-v     list  archive files (verbose format) or show diagnostic version info.  This option has evolved and
       now behaves as both an option and a modifier.  As an option it has two purposes:  when  a  zipfile
       is  specified with no other options, -v lists archive files verbosely, adding to the basic -l info
       the compression method, compressed size, compression ratio and 32-bit CRC.  In contrast to most of
       the  competing  utilities,  unzip removes the 12 additional header bytes of encrypted entries from
       the compressed size numbers.   Therefore,  compressed  size  and  compression  ratio  figures  are
       independent  of  the entry's encryption status and show the correct compression performance.  (The
       complete size of the encrypted compressed data stream for zipfile entries is reported by the  more
       verbose  zipinfo(1) reports, see the separate manual.)  When no zipfile is specified (that is, the
       complete command is simply ``unzip -v''), a diagnostic screen is  printed.   In  addition  to  the
       normal  header  with release date and version, unzip lists the home Info-ZIP ftp site and where to
       find a list of other ftp and non-ftp sites; the target operating system for which it was compiled,
       as  well  as  (possibly) the hardware on which it was compiled, the compiler and version used, and
       the compilation date; any special compilation options that might affect  the  program's  operation
       (see  also  DECRYPTION  below);  and any options stored in environment variables that might do the
       same (see ENVIRONMENT OPTIONS below).  As a modifier it works in conjunction  with  other  options
       (e.g., -t) to produce more verbose or debugging output; this is not yet fully implemented but will
       be in future releases.

-z     display only the archive comment.

-b     [general] treat all files as binary (no text conversions).  This is a shortcut for ---a.