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Re: $BAUD is strange on Linux for 115200
- X-seq: zsh-workers 1435
- From: Zoltan Hidvegi <hzoli@xxxxxxxxxx>
- To: chexum@xxxxxxxxxxxxxxx (Janos Farkas)
- Subject: Re: $BAUD is strange on Linux for 115200
- Date: Mon, 24 Jun 1996 19:54:09 +0200 (MET DST)
- Cc: zsh-workers@xxxxxxxxxxxxxxx
- In-reply-to: <Pine.LNX.3.93.960624191101.7983B-100000@xxxxxxxxxxxxxxx> from Janos Farkas at "Jun 24, 96 07:14:51 pm"
- Organization: Dept. of Comp. Sci., Eotvos University, Budapest, Hungary
- Phone: (36 1)2669833 ext: 2667, home phone: (36 1) 2752368
Janos Farkas wrote:
>
> If I am using an 'extended' speed (i.e. >38400), BAUD used to be
> something like 4098, because the original logic in this code thought
> that if the speed code returned by cfget?speed() is larger than
> 100, then it's the real baud rate, not a symbolic value. This
> is not so on Linux. [Taking the opportunity, I added some recently
> added baud rates to the list]. Anyone can see any problems with the code
> below?
>
> Janos
>
> diff -urN zsh-2.6-beta21.orig/Src/utils.c zsh-2.6-beta21/Src/utils.c
> --- zsh-2.6-beta21.orig/Src/utils.c Wed Jun 19 22:01:40 1996
> +++ zsh-2.6-beta21/Src/utils.c Sun Jun 23 22:55:21 1996
> @@ -2715,9 +2715,16 @@
>
> # if defined(HAVE_TCGETATTR) && defined(HAVE_TERMIOS_H)
> tempbaud = cfgetospeed(&shttyinfo->tio);
> +#if defined CBAUDEX && CBAUDEX > 100
> + /* If we have CBAUDEX, then it's a mask of the extended
> + speeds, and the baud rates are still encoded. At least
> + this is so on Linux, and I hope this logic is true on
> + most systems. */
> +#else
> if (tempbaud >= 100)
> return tempbaud;
> else
> +#endif
> speedcode = (int) tempbaud;
> # else
> speedcode = shttyinfo->tio.c_cflag & CBAUD;
Is'n it better to move the tempbaud >= 100 check to the default case in
switch (speedcode) (modifying the type of speedcode from int to long)?
I'm sure that if cfgetospeed() returns the value of a B... macro than its
the logical meaning should always be used.
Zoltan
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