From b7459e56bd36389bab3dbcc06418b94a256e0138 Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Tue, 27 Feb 1996 19:19:12 +0000 Subject: Tue Feb 27 12:14:59 1996 Roland McGrath * time/strftime.c: Support - and _ flags to affect number padding. * sysdeps/unix/common/tcsendbrk.c: New file. --- sysdeps/unix/common/tcsendbrk.c | 47 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 sysdeps/unix/common/tcsendbrk.c (limited to 'sysdeps/unix/common/tcsendbrk.c') diff --git a/sysdeps/unix/common/tcsendbrk.c b/sysdeps/unix/common/tcsendbrk.c new file mode 100644 index 0000000000..348321a492 --- /dev/null +++ b/sysdeps/unix/common/tcsendbrk.c @@ -0,0 +1,47 @@ +/* Send break to terminal. +Copyright (C) 1996 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 Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include +#include +#include +#include + +/* Send zero bits on FD. */ +int +tcsendbreak (int fd, int duration) +{ + /* The break lasts 0.25 to 0.5 seconds if DURATION is zero, + and an implementation-defined period if DURATION is nonzero. + We define a positive DURATION to be number of milliseconds to break. */ + if (duration <= 0) + return __ioctl (fd, TCSBRK, 0); + +#ifdef TCSBRKP + /* Probably Linux-specific: a positive third TCSBRKP ioctl argument is + defined to be the number of 100ms units to break. */ + return __ioctl (fd, TCSBRKP, (duration + 99) / 100); +#else + /* ioctl can't send a break of any other duration for us. + This could be changed to use trickery (e.g. lower speed and + send a '\0') to send the break, but for now just return an error. */ + errno = EINVAL; + return -1; +#endif +} + -- cgit v1.2.3