Updated: Cygwin 1.1.5-7
Sun Nov 12 13:54:00 GMT 2000
> >How can we read this `magic number' ?
> Huh? Use 'read()', I guess. Is this a trick question?
It is if you don't know where or what to read.
Here are some details:
open the file in binary mode.
Read the first two characters.
If they are "MZ" or "ZM" then you have an MS-DOS executable.
One of the fields in the DOS header has a pointer to a *second* magic
number. If this second magic number is "PE\0\0" then you have a
32-bit Windows executable.
If you need more information than that, look up Ralf Brown's interrupt
list, which details all the executable header types.
Want to unsubscribe from this list?
Send a message to email@example.com
More information about the Cygwin