Hi!
L. Weiss wrote:
> BTW: Does it matter how much i strip? 4 or 8 bytes?
4 bytes should be enough - unless the PE marker appears twice.
> Whats the easiest way for
> stripping? I used 'dd bs=1 count=<filesize - 4> if=... of=...' , but with a
> blocksize of one byte it takes very long to copy the whole part...
If you have GNU tools:
head --bytes=-4 < infile > outfile
Note the "-" in "-4".
In case you're a C programmer, you could also write a tiny tool that
uses (f)truncate(3) to chop off the end in almost no time (i.e. without
copying). Maybe it's a good idea to check whether the file really ends
with 00 00 01 b9 before chewing on its tail. E.g. like this:
/*** BEWARE! ***/
/*** Incomplete pseudo code without any error checking! ***/
/*** Also remember to use -D_FILE_OFFSET_BITS=64 ***/
uint32_t buf;
off_t pos;
int fd;
fd = open(filename, O_RDWR);
pos = lseek(fd, (off_t)-4, SEEK_END);
if (read(fd, &buf, 4) == 4 && buf == htonl(0x1b9)) {
ftruncate(fd, pos);
}
close(fd);
--
Michael "Tired" Riepe <[EMAIL PROTECTED]>
X-Tired: Each morning I get up I die a little
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