"#!" scripts, kernel patches, and Xenix
The Beach Bum
haugj at pigs.UUCP
Sat Sep 17 06:53:25 AEST 1988
In article <1459 at ssc.UUCP> markz at ssc.UUCP (Mark Zenier) writes:
>Isn't the shell script check implemented in the library routine that
>is linked in, and not the kernel. This is what Rochkind says in
>"Advanced Unix Programming". This sounds much easier than disassembling
>half of the kernel.
it depends. on some systems the '#!' hack is part of the C library.
on others, it is in the kernel. the actually hack is so simple that
it can be added in one afternoon of work.
i'd guess [ in case ross wants to added it to xenix 2.4 ;-) ] the
best place to start is in gethead(). just look for the appropriate
magic number [ see the previous posting by my ], then jump off and
get the program name since the block has already by read [ there should
be a bread() in gethead() - add an extra field to the x.out header
for the program name or something ... ]
and we are only talking about disassembling 2000 lines of assembler
or so. shouldn't take more than 3 or 4 days to produce C code from
that ;-)
--
=-=-=-=-=-=-=-The Beach Bum at The Big "D" Home for Wayward Hackers-=-=-=-=-=-=
Very Long Address: John.F.Haugh at rpp386.dallas.tx.us
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"ANSI C: Just say no" -- Me
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