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For powerpc the termios ioctl numbers are defined with reference to the argument-structure size. This structure must be the one expected by the kernel (kernel termios) not the one defined by GLIBC (in termios.h). Work around this by defining ioctl numbers with reference to the privately defined termios2 structure. Applies only to Linux/PowePC, and only if USE_CUSTOM_BAUD is enabled.
167 lines
5.6 KiB
C
167 lines
5.6 KiB
C
/*
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* termbits2.c
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*
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* Stuff that we should include from kernel sources, if we could; but
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* we can't. Included from "termios2.h"
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*
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* by Nick Patavalis (npat@efault.net)
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*
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* ATTENTION: Linux-specific kludge!
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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#ifndef TERMBITS2_H
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#define TERMBITS2_H
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#ifndef __linux__
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#error "Linux specific code!"
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#endif
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/* We need tcflag_t, cc_t, speed_t, CBAUDEX, etc */
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#include <termios.h>
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/* These definitions must correspond to the kernel structures as
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defined in:
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<linux-kernel>/arch/<arch>/include/uapi/asm/termbits.h
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or <linux-kernel>/include/uapi/asm-generic/termbits.h
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which are the same as:
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/usr/include/<arch>/asm/termbits.h
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or /usr/include/asm-generic/termbits.h
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Unfortunatelly, we cannot just include <asm/termbits.h> or
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<asm/termios.h> or <linux/termios.h> (all would do the trick)
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because then "struct termios" would be re-defined to the kernel
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version, which is not the same as the libc version. In effect, you
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cannot both include <termios.h> and <linux/termios.h> because both
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define a "struct termios" which may or maynot be the same. We want
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our "struct termios" here to be the libc version (as defined in
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<termios.h>), because that's what our callers use. As a result we
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cannot get the definion of "struct termios2" from the above header
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files, since this would also bring-in the clashing definition of the
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kernel version of "struct termios". If you have an idea for a better
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way out of this mess, I would REALLY like to hear it.
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I hope that soon GLIBC will pick-up termios2 and all these will be
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useless. Until then ...
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ATTENTION: For most architectures "struct termios2" and the
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associated constants we care about (NCCS, BOTHER, IBSHIFT) are the
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same. For some there are small differences, and some architectures
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do not support termios2 at all. I don't claim to have done a
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thorough job figuring out the specifics for every architecture, so
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your milleage may vary. In any case, if you want support for
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something that's missing, just copy the relevant definitions from
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the kernel header file in here, recompile, test, and send me a
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patch. */
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#if defined (__alpha__)
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#error "Architecure has no termios2 support"
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#elif defined (__powerpc__) || defined (__powerpc64__)
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#define K_NCCS 19
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/* The "old" termios is the same with termios2 for powerpc's */
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struct termios2 {
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tcflag_t c_iflag; /* input mode flags */
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tcflag_t c_oflag; /* output mode flags */
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tcflag_t c_cflag; /* control mode flags */
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tcflag_t c_lflag; /* local mode flags */
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cc_t c_cc[K_NCCS]; /* control characters */
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cc_t c_line; /* line discipline */
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speed_t c_ispeed; /* input speed */
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speed_t c_ospeed; /* output speed */
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};
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#define BOTHER 00037
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#define IBSHIFT 16
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/* powerpc ioctl numbers have the argument-size encoded. Make sure we
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use the correct structure (i.e. kernel termios, not LIBC termios)
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when calculating them. */
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#define IOCTL_SETS _IOW('t', 20, struct termios2)
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#define IOCTL_SETSW _IOW('t', 21, struct termios2)
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#define IOCTL_SETSF _IOW('t', 22, struct termios2)
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#define IOCTL_GETS _IOR('t', 19, struct termios2)
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#elif defined (__mips__)
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#define K_NCCS 23
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struct termios2 {
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tcflag_t c_iflag; /* input mode flags */
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tcflag_t c_oflag; /* output mode flags */
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tcflag_t c_cflag; /* control mode flags */
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tcflag_t c_lflag; /* local mode flags */
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cc_t c_line; /* line discipline */
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cc_t c_cc[K_NCCS]; /* control characters */
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speed_t c_ispeed; /* input speed */
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speed_t c_ospeed; /* output speed */
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};
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#define BOTHER CBAUDEX
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#define IBSHIFT 16
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#define IOCTL_SETS TCSETS2
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#define IOCTL_SETSW TCSETSW2
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#define IOCTL_SETSF TCSETSF2
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#define IOCTL_GETS TCGETS2
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#else /* All others */
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#define K_NCCS 19
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struct termios2 {
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tcflag_t c_iflag; /* input mode flags */
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tcflag_t c_oflag; /* output mode flags */
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tcflag_t c_cflag; /* control mode flags */
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tcflag_t c_lflag; /* local mode flags */
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cc_t c_line; /* line discipline */
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cc_t c_cc[K_NCCS]; /* control characters */
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speed_t c_ispeed; /* input speed */
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speed_t c_ospeed; /* output speed */
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};
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#define BOTHER CBAUDEX
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#define IBSHIFT 16
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#define IOCTL_SETS TCSETS2
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#define IOCTL_SETSW TCSETSW2
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#define IOCTL_SETSF TCSETSF2
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#define IOCTL_GETS TCGETS2
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#endif /* of architectures */
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/***************************************************************************/
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#endif /* of TERMBITS2_H */
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/***************************************************************************/
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/*
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* Local Variables:
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* mode:c
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* tab-width: 4
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* c-basic-offset: 4
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* indent-tabs-mode: nil
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* End:
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*/
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