Add some error checking around ioctl's for terminal switching.
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Fri Nov 22 16:39:57 1991 John Gilmore (gnu at cygnus.com)
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* inflow.c (terminal_inferior): Check the results of ioctl's, and
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print a message if any of them fail.
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(terminal_ours_1): Store result of ioctl's for debugging, but
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don't print (the terminal isn't ours...).
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* tm-tahoe.h (FRAME_ARGS_ADDRESS): No need to offset from frame
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pointer.
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