问题
I want to know how to create a PATCH for the difference file I got by comparing two binary files. $cmp -l > output file name
I checked for text files 'diff" can be used to compare and generate a PATCH file $ diff -u oldFile newFile > mods.diff # -u tells diff to output unified diff format
I want to apply the PATCH on the old binary image file to get my new binary image file.
回答1:
Diff and Patch are designed to work with text files, not arbitrary binary data. You should use something like bsdiff instead.
回答2:
JDIFF is a program that outputs the differences between two (binary) files.
Also you can use therdiff command.
回答3:
If your repository, or package is using git you can make binary diff with
git diff --patch --binary old_dir patched_dir
Of course you can also use it with commits
git diff --patch --binary commit1 commit2
回答4:
If you still want to use diff & patch. Here is a way... Write a c program yourself to insert a newline character at the end of every 512/1024/your_choice bytes (this is just to fool the diff as it compares the files line by line). Run this script on your two input files.
Then run 'diff -au file1 file2 > mod.diff (you will get the patch here)'
Patching is simple 'patch < mod.diff'
Than again write a program to remove the newlines from the binary file. That is all...
来源：https://stackoverflow.com/questions/2415127/how-to-create-a-patch-file-for-the-binary-difference-output-file