37 lines
812 B
Plaintext
37 lines
812 B
Plaintext
import stdlib.sl
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macro TCGETS 0 0x5401 ;
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macro ENOTTY 0 25 ;
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macro EBADF 0 9 ;
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# isatty [* | fd] -> [* | flag]
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word isatty
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>r # save fd
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60 alloc # push addr
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r@ TCGETS over 3 16 syscall # addr result
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# Duplicate result and save it
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dup >r # push result to return stack
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# Free buffer
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60 swap free # free(addr, size)
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# Restore result
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r> # result back to data stack
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# Check result
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dup ENOTTY neg == if # -ENOTTY (not a tty)
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drop 0
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else
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dup EBADF neg == if # -EBADF (bad fd)
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drop -1
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else
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# Any other value means it's a tty
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drop 1
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end
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end
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rdrop
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end
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