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The pseudo-terminal device handling tests in some places make
tcgetattr(3C) and tcsetattr(3C) calls using the control/manager file
descriptor rather than the subordinate terminal descriptor. This works
on some systems, but not all; others such as illumos (and presumably
Solaris) are more strict and require the termios requests be made
against the terminal descriptor only.
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The libc_bitflags! macro was replaced with a non-recursive one supporting
only public structs. I could not figure out how to make the old macro work
with the upgrade, so I reworked part of the bitflags! macro directly to suit
our needs, much as the original recursive macro was made. There are no uses
of this macro for non-public structs, so this is not a problem for internal code.
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ptsname(3) returns a pointer to a global variable, so it isn't
thread-safe. Protect it with a mutex.
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* Make test_tcgetattr deterministic. The old version behaved
differently depending on what file descriptors were opened by the
harness or by other tests, and could race against other tests.
* Close some file descriptor leaks
Fixes #154
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This also removes the incorrect TCSASOFT definition as an enum type because it's
actually a bitfield.
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