81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
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/* Copyright (C) 1992-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sysdep.h>
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/* The difference here is that the termios structure used in the
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kernel is not the same as we use in the libc. Therefore we must
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translate it here. */
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#include <kernel_termios.h>
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/* Put the state of FD into *TERMIOS_P. */
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int
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__tcgetattr (int fd, struct termios *termios_p)
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{
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struct __kernel_termios k_termios;
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int retval;
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retval = INLINE_SYSCALL (ioctl, 3, fd, TCGETS, &k_termios);
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if (__glibc_likely (retval == 0))
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{
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termios_p->c_iflag = k_termios.c_iflag;
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termios_p->c_oflag = k_termios.c_oflag;
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termios_p->c_cflag = k_termios.c_cflag;
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termios_p->c_lflag = k_termios.c_lflag;
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termios_p->c_line = k_termios.c_line;
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#if _HAVE_STRUCT_TERMIOS_C_ISPEED
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# if _HAVE_C_ISPEED
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termios_p->c_ispeed = k_termios.c_ispeed;
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# else
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termios_p->c_ispeed = k_termios.c_cflag & (CBAUD | CBAUDEX);
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# endif
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#endif
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#if _HAVE_STRUCT_TERMIOS_C_OSPEED
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# if _HAVE_C_OSPEED
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termios_p->c_ospeed = k_termios.c_ospeed;
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# else
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termios_p->c_ospeed = k_termios.c_cflag & (CBAUD | CBAUDEX);
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# endif
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#endif
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if (sizeof (cc_t) == 1 || _POSIX_VDISABLE == 0
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|| (unsigned char) _POSIX_VDISABLE == (unsigned char) -1)
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memset (__mempcpy (&termios_p->c_cc[0], &k_termios.c_cc[0],
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__KERNEL_NCCS * sizeof (cc_t)),
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_POSIX_VDISABLE, (NCCS - __KERNEL_NCCS) * sizeof (cc_t));
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else
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{
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memcpy (&termios_p->c_cc[0], &k_termios.c_cc[0],
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__KERNEL_NCCS * sizeof (cc_t));
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for (size_t cnt = __KERNEL_NCCS; cnt < NCCS; ++cnt)
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termios_p->c_cc[cnt] = _POSIX_VDISABLE;
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}
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}
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return retval;
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}
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libc_hidden_def (__tcgetattr)
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weak_alias (__tcgetattr, tcgetattr)
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