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As suggested by Joshua, this commit adds the 2-clause BSD license as a
comment block to the top of every source file.
For the first pass, I've just added myself for simplicity. I encourage
everyone to add themselves as copyright holders of any file they've
added or modified in some significant way. If I've added myself in
error somewhere, feel free to replace it with the appropriate copyright
holder instead.
Going forward, all new source files should include a license header.
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This can be implemented entirely in userspace by calling tcgetattr().
To avoid screwing up the syscall indexes, this patch also adds a
mechanism for removing a syscall without shifting the index of other
syscalls.
Note that ports will still have to be rebuilt after this change,
as their LibC code will try to make the isatty() syscall on startup.
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The Plan9 OS has this program that can test a system call with the
given arguments. For the most basic system calls it can be very
helpful and aid with testing or just to play with a given syscall
without writing a dedicated program.
Some examples:
syscall write 1 hello 5
syscall -o read 0 buf 5
syscall mkdir /tmp/my-dir
syscall exit 2
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