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[/] [or1k/] [trunk/] [newlib-1.10.0/] [newlib/] [libc/] [sys/] [sysvi386/] [tcline.c] - Blame information for rev 1773

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#define _NO_MACROS
#include <sys/unistd.h>
#include <sys/termios.h>
#include <errno.h>
 
int
tcsendbreak (int fd, int dur) {
        do {
                if (_ioctl (fd, _TCSBRK, 0) == -1)
                        return -1;
        } while (dur--);
        return 0;
}
 
int
tcdrain (int fd) {
        return _ioctl (fd, _TCSBRK, 1);
}
 
int
tcflush(int fd, int what) {
        return _ioctl (fd, _TCFLSH, what);
}
 
/*
 * I'm not positive about this function.  I *think* it's right,
 * but I could be missing something.
 */
 
int
tcflow (int fd, int action) {
        struct termios t;
 
        switch (action) {
        case TCOOFF:
        case TCOON:
                return _ioctl (fd, _TCXONC, action);
/*
 * Here is where I'm not terribly certain.  1003.1 says:
 * if action is TCIOFF, the system shall transmit a STOP
 * character, which is intended to cause the terminal device
 * to stop transmitting data to the system.  (Similarly for
 * TCION.)
 * I *assume* that means I find out what VSTOP for the
 * terminal device is, and then write it.  1003.1 also does
 * not say what happens if c_cc[VSTOP] is _POSIX_VDISABLE;
 * I assume it should reaturn EINVAL, so that's what I do.
 * Anyway, here's the code.  It might or might not be right.
 */
        case TCIOFF:
                if (tcgetattr (fd, &t) == -1)
                        return -1;
                if (tcgetattr (fd, &t) == -1)
                        return -1;
#ifdef _POSIX_VDISABLE
                if (t.c_cc[VSTOP] == _POSIX_VDISABLE) {
                        errno = EINVAL;
                        return -1;
                }
#endif
                if (write (fd, &t.c_cc[VSTOP], 1) == 1)
                        return 0;
                else
                        return -1;
        case TCION:
                if (tcgetattr (fd, &t) == -1)
                        return -1;
                if (tcgetattr (fd, &t) == -1)
                        return -1;
#ifdef _POSIX_VDISABLE
                if (t.c_cc[VSTART] == _POSIX_VDISABLE) {
                        errno = EINVAL;
                        return -1;
                }
#endif
                if (write (fd, &t.c_cc[VSTART], 1) == 1)
                        return 0;
                else
                        return -1;
        default:
                errno = EINVAL;
                return -1;
        }
}

Line No.	Rev	Author	Line
1	1010	ivang	`#define _NO_MACROS`
2			`#include <sys/unistd.h>`
3			`#include <sys/termios.h>`
4			`#include <errno.h>`
5
6			`int`
7			`tcsendbreak (int fd, int dur) {`
8			`do {`
9			`if (_ioctl (fd, _TCSBRK, 0) == -1)`
10			`return -1;`
11			`} while (dur--);`
12			`return 0;`
13			`}`
14
15			`int`
16			`tcdrain (int fd) {`
17			`return _ioctl (fd, _TCSBRK, 1);`
18			`}`
19
20			`int`
21			`tcflush(int fd, int what) {`
22			`return _ioctl (fd, _TCFLSH, what);`
23			`}`
24
25			`/*`
26			`* I'm not positive about this function. I think it's right,`
27			`* but I could be missing something.`
28			`*/`
29
30			`int`
31			`tcflow (int fd, int action) {`
32			`struct termios t;`
33
34			`switch (action) {`
35			`case TCOOFF:`
36			`case TCOON:`
37			`return _ioctl (fd, _TCXONC, action);`
38			`/*`
39			`* Here is where I'm not terribly certain. 1003.1 says:`
40			`* if action is TCIOFF, the system shall transmit a STOP`
41			`* character, which is intended to cause the terminal device`
42			`* to stop transmitting data to the system. (Similarly for`
43			`* TCION.)`
44			`* I assume that means I find out what VSTOP for the`
45			`* terminal device is, and then write it. 1003.1 also does`
46			`* not say what happens if c_cc[VSTOP] is _POSIX_VDISABLE;`
47			`* I assume it should reaturn EINVAL, so that's what I do.`
48			`* Anyway, here's the code. It might or might not be right.`
49			`*/`
50			`case TCIOFF:`
51			`if (tcgetattr (fd, &t) == -1)`
52			`return -1;`
53			`if (tcgetattr (fd, &t) == -1)`
54			`return -1;`
55			`#ifdef _POSIX_VDISABLE`
56			`if (t.c_cc[VSTOP] == _POSIX_VDISABLE) {`
57			`errno = EINVAL;`
58			`return -1;`
59			`}`
60			`#endif`
61			`if (write (fd, &t.c_cc[VSTOP], 1) == 1)`
62			`return 0;`
63			`else`
64			`return -1;`
65			`case TCION:`
66			`if (tcgetattr (fd, &t) == -1)`
67			`return -1;`
68			`if (tcgetattr (fd, &t) == -1)`
69			`return -1;`
70			`#ifdef _POSIX_VDISABLE`
71			`if (t.c_cc[VSTART] == _POSIX_VDISABLE) {`
72			`errno = EINVAL;`
73			`return -1;`
74			`}`
75			`#endif`
76			`if (write (fd, &t.c_cc[VSTART], 1) == 1)`
77			`return 0;`
78			`else`
79			`return -1;`
80			`default:`
81			`errno = EINVAL;`
82			`return -1;`
83			`}`
84			`}`

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[/] [or1k/] [trunk/] [newlib-1.10.0/] [newlib/] [libc/] [sys/] [sysvi386/] [tcline.c] - Blame information for rev 1773