# sozip

New in version 3.7.

Generate a seek-optimized ZIP (SOZip) file.

## Synopsis

    sozip [--quiet|--verbose]
          [[-g|--grow] | [--overwrite]]
          [-r|--recurse-paths]
          [-j|--junk-paths]
          [-l|--list]
          [--optimize-from=<input.zip>]
          [--validate]
          [--enable-sozip=auto/yes/no]
          [--sozip-chunk-size=value]
          [--sozip-min-file-size=value]
          [--content-type=value]
          zip_filename [filename]*

## Description

The sozip utility can be used to:

- create a SOZip (Seek-Optimized ZIP) file

- append files to an existing ZIP/SOZip file

- list the contents of a ZIP/SOZip file

- validate a SOZip file

- convert an existing Zip file in a SOZip optimized one

--quiet

  Quiet mode. No progress message is emitted on the standard output.

--verbose

  Verbose mode.

-g

--grow

  Grow an existing zip file with the content of the specified filename(s). This is the default mode of the utility. This switch is here for compatibility with Info-ZIP zip utility

--overwrite

  Overwrite the target zip file if it already exists.

-l

--list

  List the files contained in the zip file in an output similar to Info-ZIP unzip utility, but with the addition of a column indicating whether each file is seek-optimized.

--validate

  Validates a SOZip file. Baseline ZIP validation is done in a light way, limited to being able to browse through ZIP records with the InfoZIP-based ZIP reader used by GDAL. But validation of the SOZip-specific aspects is done in a more thoroughful way.

-j

--junk-paths

  Store just the name of a saved file (junk the path), and do not store directory names. By default, sozip will store the full path (relative to the current directory).

--optimize-from=<input.zip>

  Re-process {input.zip} to generate a SOZip-optimized .zip. Options `--enable-sozip`, `--sozip-chunk-size` and `--sozip-min-file-size` may be used in that mode.

--enable-sozip=auto/yes/no

  In `auto` mode, a file is seek-optimized only if its size is above the value of `--sozip-chunk-size`. In `yes` mode, all input files will be seek-optimized. In `no` mode, no input files will be seek-optimized.

--sozip-chunk-size

  Chunk size for a seek-optimized file. Defaults to 32768 bytes. The value is specified in bytes, or K and M suffix can be respectively used to specify a value in kilo-bytes or mega-bytes.

--sozip-min-file-size

  Minimum file size to decide if a file should be seek-optimized, in –enable-sozip=auto mode. Defaults to 1 MB byte. The value is specified in bytes, or K, M or G suffix can be respectively used to specify a value in kilo-bytes, mega-bytes or giga-bytes.

--content-type=<value>

  Store the Content-Type for the file being added as a key-value pair in the extra field extension ‘KV’ (0x564b) dedicated to storing key-value pair metadata

<zip_filename>

  Filename of the zip file to create/append to/list.

<filename>

  Filename of the file to add.

## Multithreading

The `GDAL_NUM_THREADS` configuration option can be set to `ALL_CPUS` or a integer value to specify the number of threads to use for SOZip-compressed files. Defaults to `ALL_CPUS`.

## C API

Functionality of this utility can be done from C with `CPLAddFileInZip()` or `VSICopyFile()`.

## Examples

Create a, potentially seek-optimized, ZIP file with the content of my.gpkg:

    sozip my.gpkg.zip my.gpkg

Create a, potentially seek-optimized, ZIP file from the content of a source directory:

    sozip -r my.gpkg.zip source_dir/

Create a, potentially seek-optimized, ZIP file from an existing ZIP file.

    sozip --convert-from=in.zip out.zip

List the contents of a ZIP file and display which files are seek-optimized:

    sozip -l my.gpkg.zip

Validates a SOZip file:

    sozip --validate my.gpkg.zip