Annotation of prex/usr/lib/libc/termios/tcflow.c, Revision 1.1.1.1
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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