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getty: more correct check for O_RDWR
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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@ -268,7 +268,7 @@ static void open_tty(const char *tty)
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* Standard input should already be connected to an open port. Make
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* sure it is open for read/write.
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*/
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if ((fcntl(0, F_GETFL) & O_RDWR) != O_RDWR)
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if ((fcntl(0, F_GETFL) & (O_RDWR|O_RDONLY|O_WRONLY)) != O_RDWR)
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bb_error_msg_and_die("stdin is not open for read/write");
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}
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}
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