A convenient block copy program.
bcp is intended to copy contiguous
chunks of files from point A to point B. Want to cookie-cutter a
piece out of of a file and plop it down in the middle of another file?
Here you go.
The main use case I want for myself is doing light surgery to disk images, such as "copy this bootloader block into the image at this offset".
$ bcp --help bcp 0.2.0 Simon Heath <firstname.lastname@example.org> A convenient program for copying blocks of bytes within files. USAGE: bcp [FLAGS] [OPTIONS] <SRC> <DST> FLAGS: -v, --verbose Verbose output, with progress bar. -h, --help Prints help information -V, --version Prints version information OPTIONS: -s, --src-offset <src_offset> The byte offset in the source file to start reading from. Must not be larger than the file in question. [default: 0] -d, --dst-offset <dst_offset> The byte offset in the destination file to start writing to. Must not be larger than the file in question, and the file must exist. [default: 0] -c, --count <count> The number of bytes to copy. Defaults to "all of them", from the `src-offset` to the end of the file. Asking to read past the end of the source file is an error. ARGS: <SRC> The source file to copy from. <DST> The destination file to copy to. Will create the file if it does not exist.
Basically, the goal is to make a nicer version of the traditional Unix
dd is just... weird. See the Jargon file
entry for it, particularly
lines like "the user interface for it is clearly a prank" and "it has
no exact replacement". So, why not just make a replacement?
In particular: I want a Unix-y command line interface, I want to be
able to blit large chunks of files from point A to point B, and I
really don't need EBCDIC translation, byte swapping, "fail if the
output file already exists" being classified as a conversion, a
default block size of 512 bytes because that's how big hard drive
blocks were on a PDP-11, or the ability to have it catch a
and print I/O statistics. I want it to copy bytes, and that's all.
...Okay, and have a progress bar. But that's it. Honest!