unzsplit(8) - Linux man page

Name

unzsplit - will read splitted files produced by zsplit, glue and decompress them to its origin.

Synopsis

unzsplit [ OPZIONS ] SOURCE

Description

unzsplit reads from SOURCE which can be one, or a list of splitted and compressed files produced by zsplit, make decompress and glue them in a right order together. The result of operation is the uncompressed original big file or restored device. To read the list of files it is sufficient to use a common part of the file names as a SOURCE. Unzsplit recognizes all files which belong to the list and the right order of reading of file-chunks if file names remain the same as created by zsplit (see example). It is absolutely necessarily that the file name contains the end part: _[digit].spl.zp (such as: _0.spl.zp or _1.spl.zp ...) because this [digit] is used to find a right reading order of file chunks. The [digit] of the first file should always be 0.

Options

-b, --buffer SIZE: Setup read/write buffer SIZE (in kibibytes) to optimize read/write speed. Example of SIZE: 2 (2048 bytes). If this option is not used, the default size is 64 (65536 bytes).
-c, --stdout: Write output to stdout (standard output).
-D, --outdev: Write output to output device.
-d, --debug: Debug information will be written into the debug.log file in the current directory If this option is not used, the debug information will be printed to stderr.
-i, --indir DIR: Input directory (DIR is directory which containes the SOURCE). SOURCE can be a file (example: some_name_0.spl.zp), a file list (example: some_name_0.spl.zp, some_name_1.spl.zp, ...) or stdin (-). "some_name" is a common part of names of the file list.
-m, --multivol: Switch the multivolume feature on.
-N, --outname OUT_NAME: The name of the output file.
-h, --help: Shows this message.
-o, --outdir DIR: Output directory (DIR is directory which containes the output files).
-r, --noerror: If during the read operation I/O error happens, safely ignore these errors and read farther.

Return Value

unzsplit returns 0 if during the operation no error was detected, otherwise -1.

Examples

unzsplit -D /dev/hda -d WinXP_bkp: unzsplit reads the file list in a current directory with a common name-part WinXP_bkp, such as: WinXP_bkp_0.spl.zp, WinXP_bkp_1.spl.zp, WinXP_bkp_2.spl.zp ..., uncompresses and glue them together to one image, and restore this image to the device /dev/hda. The debug information is written into the debug.log file in the current directory.
unzsplit -N test_img -o /home/user -d -: unzsplit reads from stdin, decompresses using default decompression method, creates an uncompressed image file test_img.img into the directory /home/user and writes the debug information to the debug.log file in the current directory.
unzsplit -N test_bkp WinXP_bkp: unzsplit reads list of files with a common name-part WinXP_bkp in a current directory, decompresses using default decompression method, ties all uncompressed parts in a right order together, saves the output file as test_bkp.img in the current directory and writes the debug information to the console (stderr).

Author

Jurij Ivastsuk-Kienbaum <jurij at device-image dot de>