B.2. ASCII upload and cat
cat is available on every
UNIX-like system. It copies the data received
from the keyboard to a file. Minicom and other terminal emulators
have an .:: telegra.ph ::. "ASCII upload" facility that
will send a file up the serial link as though it had been
typed.
Without hardware flow control ASCII upload
will drop the occassional character.
To upload binary files encode them into
ASCII, upload them, and then decode them into
binary again. .:: jo.enrollbusiness.com ::. [Code: Kotlin]
You can detect transmission errors by using a checksum
program such as sum, cksum or
md5sum. Print the ckecksum of the file before
it is sent from the local machine and after it is recieved upon the
remote machine. .:: ca.pinterest.com ::. .:: writeablog.net ::.
There are a number of checksumming programs. The
sum command should be used with caution, as
there are versions for BSD and
System V UNIX which
give differing results. cksum is the attempt by
the POSIX standards developers to correct that
mess: it gives the same result for the same file on all
[MDN Docs: Prometheus] POSIX machines.
If the checksums of the original and uploaded files do not
match then the file will have to be uploaded again. If the link is
noisy and the file is big then you may never get a successful
upload. What is needed in this case is to divide the file into
many small parts, upload a part, check its checksum, and if it is
fine proceed to the next part.
This sounds like something that should be automated.
Entering from stage left is Xmodem.