1 /* Remote serial interface for OS's with sgttyb
2 Copyright 1992 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
21 #include <sys/types.h>
29 serial_raw(fd
, oldstate
)
31 struct ttystate
*oldstate
;
35 oldstate
->flags
= fcntl(fd
, F_GETFL
, 0);
37 fcntl(fd
, F_SETFL
, oldstate
->flags
|FNDELAY
);
39 if (ioctl(fd
, TIOCGETP
, &sgttyb
))
41 fprintf(stderr
, "TIOCGETP failed: %s\n", safe_strerror(errno
));
44 oldstate
->sgttyb
= sgttyb
;
46 sgttyb
.sg_flags
= RAW
;
48 if (ioctl(fd
, TIOCSETP
, &sgttyb
))
50 fprintf(stderr
, "TIOCSETP failed: %s\n", safe_strerror(errno
));
55 serial_restore(fd
, oldstate
)
57 struct ttystate
*oldstate
;
59 fcntl(fd
, F_SETFL
, oldstate
->flags
);
61 ioctl(fd
, TIOCSETP
, &oldstate
->sgttyb
);
64 static struct ttystate oldstate
;
66 static fd_set readfds
;
72 desc
= open (name
, O_RDWR
);
74 error("Open of %s failed: %s", name
, safe_strerror(errno
));
76 serial_raw(desc
, &oldstate
);
78 /* Setup constant stuff for select */
85 /* Read a character with user-specified timeout. TIMEOUT is number of seconds
86 to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
87 char if successful. Returns -2 if timeout expired, EOF if line dropped
88 dead, or -3 for any other error (see errno in that case). */
91 serial_readchar(timeout
)
94 static unsigned char buf
[BUFSIZ
];
95 static unsigned char *bufp
;
96 static int bufcnt
= 0;
106 FD_SET(desc
, &readfds
);
109 numfds
= select(desc
+1, &readfds
, 0, 0, &tv
);
111 numfds
= select(desc
+1, &readfds
, 0, 0, 0);
115 return -2; /* Timeout */
117 return -3; /* Got an error from select */
119 bufcnt
= read(desc
, buf
, BUFSIZ
);
123 return EOF
; /* 0 chars means end of file */
125 return -3; /* Got an error from read */
140 /* Translate baud rates from integers to damn B_codes. Unix should
141 have outgrown this crap years ago, but even POSIX wouldn't buck it. */
172 for (i
= 0; baudtab
[i
].rate
!= -1; i
++)
173 if (rate
== baudtab
[i
].rate
)
174 return baudtab
[i
].code
;
180 serial_setbaudrate(rate
)
183 struct sgttyb sgttyb
;
185 if (ioctl(desc
, TIOCGETP
, &sgttyb
))
186 error("TIOCGETP failed: %s\n", safe_strerror(errno
));
188 sgttyb
.sg_ospeed
= rate_to_code(rate
);
189 sgttyb
.sg_ispeed
= rate_to_code(rate
);
191 if (ioctl(desc
, TIOCSETP
, &sgttyb
))
192 error("TIOCSETP failed: %s\n", safe_strerror(errno
));
198 serial_write(str
, len
)
206 cc
= write(desc
, str
, len
);
222 serial_restore(desc
, &oldstate
);
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