bash 如何使用“cmp”比较两个二进制文件并找到它们不同的所有字节偏移量？
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How to use "cmp" to compare two binaries and find all the byte offsets where they differ?
提问by lewis denny
I would love some help with a Bash script loop that will show all the differences between two binary files, using just
我希望得到一些有关 Bash 脚本循环的帮助，该循环将显示两个二进制文件之间的所有差异，仅使用
cmp file1 file2
It only shows the first change I would like to use cmp because it gives a offset an a line number of where each change is but if you think there's a better command I'm open to it :) thanks
它只显示我想使用 cmp 的第一个更改，因为它提供了一个偏移量和每个更改所在位置的行号，但如果您认为有更好的命令，我愿意接受它:) 谢谢
回答by rwos
I think cmp -l file1 file2might do what you want. From the manpage:
我想cmp -l file1 file2可能会做你想做的。从联机帮助页：
-l --verbose
Output byte numbers and values of all differing bytes.
The output is a table of the offset, the byte value in file1 and the value in file2 for all differing bytes. It looks like this:
输出是偏移量表，file1 中的字节值和 file2 中所有不同字节的值。它看起来像这样：
4531 66 63
4532 63 65
4533 64 67
4580 72 40
4581 40 55
[...]
So the first difference is at offset 4531, where file1's decimal byte value is 66 and file2's is 63.
所以第一个区别是偏移量 4531，其中文件 1 的十进制字节值为 66，文件 2 的值为 63。
回答by mouviciel
The more efficient workaround I've found is to translate binary files to some form of text using od.
我发现的更有效的解决方法是使用od.
Then any flavour of diffworks fine.
然后任何味道都diff很好。
