diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/tcsetattr.c')
-rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/tcsetattr.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/tcsetattr.c b/REORG.TODO/sysdeps/unix/sysv/linux/tcsetattr.c new file mode 100644 index 0000000000..c7d1d6539e --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/tcsetattr.c @@ -0,0 +1,80 @@ +/* Copyright (C) 1993-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <string.h> +#include <termios.h> +#include <sys/ioctl.h> +#include <sys/types.h> +#include <sysdep.h> + +/* The difference here is that the termios structure used in the + kernel is not the same as we use in the libc. Therefore we must + translate it here. */ +#include <kernel_termios.h> + + +/* This is a gross hack around a kernel bug. If the cfsetispeed functions + is called with the SPEED argument set to zero this means use the same + speed as for output. But we don't have independent input and output + speeds and therefore cannot record this. + + We use an unused bit in the `c_iflag' field to keep track of this + use of `cfsetispeed'. The value here must correspond to the one used + in `speed.c'. */ +#define IBAUD0 020000000000 + + +/* Set the state of FD to *TERMIOS_P. */ +int +tcsetattr (int fd, int optional_actions, const struct termios *termios_p) +{ + struct __kernel_termios k_termios; + unsigned long int cmd; + + switch (optional_actions) + { + case TCSANOW: + cmd = TCSETS; + break; + case TCSADRAIN: + cmd = TCSETSW; + break; + case TCSAFLUSH: + cmd = TCSETSF; + break; + default: + return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL); + } + + k_termios.c_iflag = termios_p->c_iflag & ~IBAUD0; + k_termios.c_oflag = termios_p->c_oflag; + k_termios.c_cflag = termios_p->c_cflag; + k_termios.c_lflag = termios_p->c_lflag; + k_termios.c_line = termios_p->c_line; +#if defined _HAVE_C_ISPEED && defined _HAVE_STRUCT_TERMIOS_C_ISPEED + k_termios.c_ispeed = termios_p->c_ispeed; +#endif +#if defined _HAVE_C_OSPEED && defined _HAVE_STRUCT_TERMIOS_C_OSPEED + k_termios.c_ospeed = termios_p->c_ospeed; +#endif + memcpy (&k_termios.c_cc[0], &termios_p->c_cc[0], + __KERNEL_NCCS * sizeof (cc_t)); + + return INLINE_SYSCALL (ioctl, 3, fd, cmd, &k_termios); +} +libc_hidden_def (tcsetattr) |