Annotation of prex/usr/lib/libc/termios/tcflow.c, Revision 1.1
1.1 ! nbrk 1: /*-
! 2: * Copyright (c) 1989, 1993
! 3: * The Regents of the University of California. All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. Neither the name of the University nor the names of its contributors
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: #include <sys/types.h>
! 31: #include <sys/ioctl.h>
! 32: #include <sys/time.h>
! 33: #include <errno.h>
! 34: #include <termios.h>
! 35: #include <unistd.h>
! 36:
! 37: int
! 38: tcflow(fd, action)
! 39: int fd, action;
! 40: {
! 41: struct termios term;
! 42: u_char c;
! 43:
! 44: switch (action) {
! 45: case TCOOFF:
! 46: return (ioctl(fd, TIOCSTOP, 0));
! 47: case TCOON:
! 48: return (ioctl(fd, TIOCSTART, 0));
! 49: case TCION:
! 50: case TCIOFF:
! 51: if (tcgetattr(fd, &term) == -1)
! 52: return (-1);
! 53: c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
! 54: if (c != _POSIX_VDISABLE && write(fd, &c, sizeof(c)) == -1)
! 55: return (-1);
! 56: return (0);
! 57: default:
! 58: errno = EINVAL;
! 59: return (-1);
! 60: }
! 61: /* NOTREACHED */
! 62: }
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