[444] | 1 | /* Copyright (C) 1992, 1996, 1997 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, write to the Free |
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| 16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 17 | 02111-1307 USA. */ |
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| 18 | |
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| 19 | /* Modified for newlib, May 27, 2002, by Jeff Johnston */ |
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| 20 | |
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| 21 | #include <errno.h> |
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| 22 | #include <stddef.h> |
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| 23 | #include <signal.h> |
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| 24 | #include <termios.h> |
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| 25 | #include <unistd.h> |
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| 26 | #include <sys/ioctl.h> |
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| 27 | |
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| 28 | /* Send zero bits on FD. */ |
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| 29 | int |
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| 30 | tcsendbreak (fd, duration) |
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| 31 | int fd; |
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| 32 | int duration; |
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| 33 | { |
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| 34 | /* The break lasts 0.25 to 0.5 seconds if DURATION is zero, |
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| 35 | and an implementation-defined period if DURATION is nonzero. |
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| 36 | We define a positive DURATION to be number of milliseconds to break. */ |
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| 37 | if (duration <= 0) |
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| 38 | return ioctl (fd, TCSBRK, 0); |
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| 39 | |
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| 40 | /* ioctl can't send a break of any other duration for us. |
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| 41 | This could be changed to use trickery (e.g. lower speed and |
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| 42 | send a '\0') to send the break, but for now just return an error. */ |
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| 43 | errno = (EINVAL); |
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| 44 | return -1; |
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| 45 | } |
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