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readme.os2
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1993-08-05
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This is the readme file for the port to OS/2 1.x--2.x and DOS of
Ian Darwin's file(1) command. The UNIX program attempts to determine
the type of file based on the contents. A database of signatures
(the magic(4) file) is used.
Darwin's version has several enhancements over the usual UNIX versions,
including:
1. More flexible magicfile entries.
2. An "ascii magic" routine for keywords which can appear anywhere in the
file.
3. "-z" option will recursively unwind compress'd files to determine
the types.
This OS/2 port has an additional enhancement:
4. DosQ[uery]AppType is used to determine the type (DOS, OS/2, 32-bit,
etc.) of an executable or DLL.
QUICK START: Choose the appropriate executable (file-32.exe for OS/2 2.x,
file.exe for OS/2 1.x--2.x, or file-dos.exe for DOS). Copy the
file "magic" to one of the following locations:
* /etc/
* directory of the exectable
* a directory in PATH or DPATH
or use the command-line option "-m" to specify the magicfile location.
Now try:
file * or file *.*
Notes:
0. file v3 patchlevel9 is by Ian Darwin (darwin@cs.toronto.edu); see
the README file. This is the second release of the OS/2 version. Many
thanks to Greg Roelofs (newt@uchicago.edu) for the help.
1. The OS/2 2.x version requires the DLLs from the EMX distribution.
If you do not have these, then use file.exe or get
ftp-os2.cdrom.com:pub/os2/2_x/unix/gnu/emx08g/emxrt.zip
2. The magicfile needs more work. There are some other suggestions in
notes*.os2. Thanks to Jouni Miettunen (jon@stekt.oulu.fi) for the
contributions. Darwin collects magicfile entries.
3. See the files notes*.os2 for additional information on the OS/2 and
DOS ports. This is the first port to OS/2 and DOS; feedback and
magic-file entries are welcomed.
--
Darrel Hankerson hankedr@mail.auburn.edu or hank@ducvax.auburn.edu
11-Apr-93, updated 30-Jul-93
OS/2 version 3.9 to 3.9a updates:
Fixes: correct display of date info (e.g., on gzip'd files); fix
message on OS/2 exe's with no application type; correct code
which could cause trouble with the "-c" option on bad input.
Additions and corrections to the magic-file.
Changes: In OS/2 versions, continue on to the magic-file checks
in the case that DosQueryApptype indicates a DOS executable. This
permits use of the checks for special (e.g., compressed) executables.