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+## Name
+
+drain - Print file to stdout, while progressively deleting read segments
+
+## Synopsis
+
+```**sh
+$ drain [file]
+```
+
+## Description
+
+drain is a utility for simultaneously reading and deleting a file. It is
+useful, for example, when working with large files on systems with low disk space.
+drain will read blocks from the provided file, and write each block to
+the standard output stream before removing that block from the file.
+The output may be redirected to another file or utility for further processing.
+
+## Options
+
+* `-b`, `--block-size`: Base block size [in KiB] to be used during the utility operation, default is 256 KiB
+
+## Arguments
+
+* `file`: File to be read
+
+## Warning
+
+In order to progressively delete the file, drain reverses the file in-place to truncate blocks after they are read.
+Thus, it is implicitly unsafe to interrupt the utility. If the operation is interrupted, or otherwise fails,
+the input file is unlikely to be recoverable.
+
+## Examples
+
+```sh
+$ drain my-big-tar-file.tar | tar -x -C my-big-tar-file-extracted
+$ drain -b 1 my-small-tar-file.tar | tar -x -C my-small-tar-file-extracted
+```