• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 259
  • Last Modified:

Copy a + b a sys cmd


I have two files a.txt and b.txt. b.txt has information that I want to append onto a.txt. a.txt is empty (0 kb).

When I issue the cmd "copy a.txt + b.txt a.txt", a.txt now has all of b.txt + an extra character,hex code 1A, appended at the end. b.txt never had this char. a.txt s/b exact copy of b.txt Where is this extra char comming from and how do I stop this behavior?

1 Solution
copy by default does things in "text mode". In this mode the 1a is an end of file character. Coincedentally, such a copy would not copy the whole file, if there were a 0x1a embedded in it.

You can solve all of the that by forcing a binary copy with the /B switch:

copy /B a.txt+b.txt a.txt

PaullkhaAuthor Commented:
Actually, after it was adding the extra char, I was forcing a /A copy - wrong logic.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now