Using cat, head, tail on binary files
Erik Sobel
erik.sobel@alphatech.com
Fri Nov 16 13:11:00 GMT 2001
What is the trick to getting cat, head, and tail to work correctly with
binary files under WinNT? I tried setting the CYGWIN environment variable
to "binmode" as recommended by the documentation. This got things closer
to working but it's still not right.
Example: given a binary file named foo of size 10000 bytes
CYGWIN=tty
head -c50 foo > foo.part1 # got 23 bytes from foo
tail -c1000 foo > foo.part2 # got 648 bytes from foo
cat foo.part1 foo.part2 > new_foo # is not the sum of the two input file sizes
CYGWIN=binmode
head -c50 foo > foo.part1 # got 58 bytes from foo
tail -c1000 foo > foo.part2 # got 1046 bytes from foo
cat foo.part1 foo.part2 > new_foo # is not the sum of the two input file sizes
cat foo foo > foo2 # is not twice the size of foo
Any suggestions would be appreciated.
Thanks,
Erik
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Erik Sobel
esobel@alphatech.com
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