|
HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|
|
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON |
|
|
|
TIOCSSOFTCAR(2const) TIOCSSOFTCAR(2const)
TIOCGSOFTCAR, TIOCSSOFTCAR - marking a line as local
Standard C library (libc, -lc)
#include <asm/termbits.h> /* Definition of TIOC*SOFTCAR constants */
#include <sys/ioctl.h>
int ioctl(int fd, TIOCGSOFTCAR, int *argp);
int ioctl(int fd, TIOCSSOFTCAR, const int *argp);
TIOCGSOFTCAR
("Get software carrier flag") Get the status of the CLOCAL
flag in the c_cflag field of the termios structure.
TIOCSSOFTCAR
("Set software carrier flag") Set the CLOCAL flag in the
termios structure when *argp is nonzero, and clear it
otherwise.
If the CLOCAL flag for a line is off, the hardware carrier detect
(DCD) signal is significant, and an open(2) of the corresponding
terminal will block until DCD is asserted, unless the O_NONBLOCK
flag is given. If CLOCAL is set, the line behaves as if DCD is
always asserted. The software carrier flag is usually turned on
for local devices, and is off for lines with modems.
On success, 0 is returned. On error, -1 is returned, and errno
is set to indicate the error.
ioctl(2), ioctl_tty(2)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.9.1.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2024-06-26. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
[email protected]
Linux man-pages 6.9.1 2024-06-13 TIOCSSOFTCAR(2const)
Pages that refer to this page: ioctl_tty(2)
|
HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|