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6642a7f1f2
Also: Fill the user-space termios structure's "c_cc[]" slots beyond K_NCCS with _POSIX_VDISABLE.
109 lines
3.5 KiB
C
109 lines
3.5 KiB
C
/*
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* termbits2.c
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*
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* Stuff that we should include from kernel source, if we could.
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* 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: Very 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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/* 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 is 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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*/
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/* K_NCCS *may* need to be ifdef'ed according to architecture. A quick
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grep in the kernel sources (3.x) reveals that, most likely, only
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the MIPS arch has a different NCCS value.
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*/
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#if defined __mips__
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#define K_NCCS 23
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#else
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/* All others */
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#define K_NCCS 19
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#endif
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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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/* BOTHER needs to be ifdef'ed according to architecture. A quick grep
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in the kernel sources (3.x) reveals that, most likely, only the
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PowerPC arch has a different BOTHER value.
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*/
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#if defined __powerpc__
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#define BOTHER 0037
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#else
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/* All others */
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#define BOTHER CBAUDEX
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#endif
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/* AFAIK this is the same on all architectures */
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#define IBSHIFT 16
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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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