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- NSPARK(1) USER COMMANDS NSPARK(1)
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- NAME
- nspark - unpack Archimedes archives
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- SYNOPSIS
- nspark [ options ] archive [ file ... ]
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- DESCRIPTION
- The current version of nspark is 1.7.4
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- Nspark can unpack the specified Archimedes-format archive,
- list its contents or tests its integrity.
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- Nspark's main features are:
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- o Supports all archive methods used by !Spark 1 and 2. The
- old version didn't support "Squashing" and used to handle
- "Compressed" archives by using the UNIX uncompress program.
- The new version supports both these and has them built-in,
- allowing easier porting to other OS's.
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- o Supports ArcFS format archives.
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- o Supports Cyclic Redundancy Checking (CRC). The integrity
- of an archive can now be checked without having to unarchive
- it.
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- o Supports verbose option to allow archive file details to
- be displayed (time/date or exec/load address, size, type).
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- o Supports selective file unarchiving, so the whole archive
- needn't be unarchived if not all the files are wanted).
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- o Supports user-prompting before overwriting a file, allow-
- ing the user to either (1) overwrite the file, (2) overwrite
- all the files, (3) unarchive the file to a different name,
- or (4) not to unarchive the file at all.
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- o Supports file-stamping so the date and time of the file,
- when unarchived, matches the date and time it was archived
- (not 4.2BSD or SysV.2 as these systems lack vital library
- functions).
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- I have not included support for creating !Spark archives,
- and I am not really sure if I need to as: (1) !Spark for
- RISC OS is cheap (#5.99 from David Pilling), (2) !SparkPlug
- can unpack archives created with zip (which is available in
- source form for UNIX, VMS and MSDOS), and (3) it's a lot of
- work. Let me know what you think.
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- _O_p_t_i_o_n_s:
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- -x Extract the given file, or all files if none are
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- USER COMMANDS Last change: 1
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- NSPARK(1) USER COMMANDS NSPARK(1)
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- specified.
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- -u Equivalent to -x.
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- -t Test archive integrity by simulating extraction
- and checking the CRCs (Cyclic Redundancy Checks).
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- -l List archive contents.
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- -q Quiet. Displays less information when listing,
- testing or extracting.
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- -f Force file overwrite if a file already exists with
- the same name as the one being extracted. If not
- using -f then you are prompted whether you want to
- overwrite the original, skip this file, give it a
- different name, or overwrite this and all others
- that already exist.
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- -s No filestamp. Does not set the timestamp when
- extracting files.
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- -v Verbose. Gives full details when listing or
- extracting archives.
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- -R Retry if archive is corrupt. If a bad header is
- found then nspark will search the archive until
- another header if found, rather than giving up.
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- -L<name> Set name of log file to name.
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- -T Append file type to name, in the same way as Tar
- or NFS. For example Text files (filetype &FFF)
- have ,fff appended when extracted.
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- -C Create lowercase filenames. Useful on machines
- where the case of filenames is significant (eg.
- UNIX), this option forces all extracted filenames
- to be lowercase.
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- BUGS
- Filestamping is not supported under 4.2BSD or SysV2 (as no
- mktime(3) or timelocal(3) functions exist under these sys-
- tems). To correct this I could write my own or port the one
- from 386BSD (save that for a rainy day).
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- Doesn't support MSDOS yet. Working on that.
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- If compiled with GCC (v1.42) it core dumps when trying to
- test (or unarchive ?) a corrupt archive file. This doesn't
- happen when compiled with the UNIX pcc.
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- USER COMMANDS Last change: 2
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- NSPARK(1) USER COMMANDS NSPARK(1)
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- NOTES
- Nspark is in the public domain. It is currently being main-
- tained by arb (arb@comp.lancs.ac.uk).
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- SEE ALSO
- arcfs(5), spark(5).
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- AUTHOR
- Andy Duplain, BT Customer Systems, Brighton, UK.
- (duplain@btcs.bt.co.uk)
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- CONTRIBUTORS
- Improvements from version 1.5, including ArcFS support, by
- Andrew Brooks (arb@compl.ancs.ac.uk).
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- Manual pages originally supplied by Duncan
- (m91dps@ecs.oxford.ac.uk).
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- Suggestions for improvement by Tom Tromey
- (tromey@busco.lanl.gov).
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- Windows NT support by Alun Jones (auj@aber.ac.uk).
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