2 * Copyright (c) 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)sys_bsd.c 8.4 (Berkeley) 5/30/95
34 * $FreeBSD: src/crypto/telnet/telnet/sys_bsd.c,v 1.2.8.4 2002/04/13 10:59:08 markm Exp $
35 * $DragonFly: src/crypto/telnet/telnet/sys_bsd.c,v 1.2 2003/06/17 04:24:37 dillon Exp $
39 #include <sys/cdefs.h>
44 * The following routines try to encapsulate what is system dependent
45 * (at least between 4.x and dos) which is used in telnet.c.
48 #include <sys/types.h>
49 #include <sys/socket.h>
55 #include <arpa/telnet.h>
64 tout
, /* Output file descriptor */
65 tin
, /* Input file descriptor */
69 struct tchars otc
= { 0 }, ntc
= { 0 };
70 struct ltchars oltc
= { 0 }, nltc
= { 0 };
71 struct sgttyb ottyb
= { 0 }, nttyb
= { 0 };
73 # define cfgetispeed(ptr) (ptr)->sg_ispeed
74 # define cfgetospeed(ptr) (ptr)->sg_ospeed
77 #else /* USE_TERMIO */
78 struct termio old_tc
= { 0, 0, 0, 0, {}, 0, 0 };
82 # define TCSANOW TCSETS
83 # define TCSADRAIN TCSETSW
84 # define tcgetattr(f, t) ioctl(f, TCGETS, (char *)t)
87 # define TCSANOW TCSETA
88 # define TCSADRAIN TCSETAW
89 # define tcgetattr(f, t) ioctl(f, TCGETA, (char *)t)
91 # define TCSANOW TIOCSETA
92 # define TCSADRAIN TIOCSETAW
93 # define tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t)
96 # define tcsetattr(f, a, t) ioctl(f, a, (char *)t)
97 # define cfgetospeed(ptr) ((ptr)->c_cflag&CBAUD)
99 # define cfgetispeed(ptr) (((ptr)->c_cflag&CIBAUD) >> IBSHIFT)
101 # define cfgetispeed(ptr) cfgetospeed(ptr)
103 # endif /* TCSANOW */
105 # define TIOCFLUSH TC_PX_DRAIN
107 #endif /* USE_TERMIO */
109 static fd_set
*ibitsp
, *obitsp
, *xbitsp
;
113 static SIG_FUNC_RET
intr(int);
116 static SIG_FUNC_RET
intr2(int);
119 static SIG_FUNC_RET
susp(int);
122 static SIG_FUNC_RET
ayt(int);
128 tout
= fileno(stdout
);
134 TerminalWrite(char *buf
, int n
)
136 return write(tout
, buf
, n
);
140 TerminalRead(char *buf
, int n
)
142 return read(tin
, buf
, n
);
150 TerminalAutoFlush(void)
155 ioctl(0, TIOCLGET
, (char *)&flush
);
156 return !(flush
&LNOFLSH
); /* if LNOFLSH, no autoflush */
162 #ifdef KLUDGELINEMODE
163 extern int kludgelinemode
;
166 * TerminalSpecialChars()
168 * Look at an input character to see if it is a special character
169 * and decide what to do.
173 * 0 Don't add this character.
174 * 1 Do add this character
178 TerminalSpecialChars(int c
)
180 if (c
== termIntChar
) {
183 } else if (c
== termQuitChar
) {
184 #ifdef KLUDGELINEMODE
191 } else if (c
== termEofChar
) {
192 if (my_want_state_is_will(TELOPT_LINEMODE
)) {
197 } else if (c
== termSuspChar
) {
200 } else if (c
== termFlushChar
) {
201 xmitAO(); /* Transmit Abort Output */
203 } else if (!MODE_LOCAL_CHARS(globalmode
)) {
204 if (c
== termKillChar
) {
207 } else if (c
== termEraseChar
) {
208 xmitEC(); /* Transmit Erase Character */
217 * Flush output to the terminal
221 TerminalFlushOutput(void)
224 (void) ioctl(fileno(stdout
), TIOCFLUSH
, NULL
);
226 (void) ioctl(fileno(stdout
), TCFLSH
, NULL
);
231 TerminalSaveState(void)
234 ioctl(0, TIOCGETP
, (char *)&ottyb
);
235 ioctl(0, TIOCGETC
, (char *)&otc
);
236 ioctl(0, TIOCGLTC
, (char *)&oltc
);
237 ioctl(0, TIOCLGET
, (char *)&olmode
);
243 #else /* USE_TERMIO */
244 tcgetattr(0, &old_tc
);
249 termFlushChar
= CONTROL('O');
252 termWerasChar
= CONTROL('W');
255 termRprntChar
= CONTROL('R');
258 termLiteralNextChar
= CONTROL('V');
261 termStartChar
= CONTROL('Q');
264 termStopChar
= CONTROL('S');
267 termAytChar
= CONTROL('T');
269 #endif /* USE_TERMIO */
276 case SLC_IP
: return(&termIntChar
);
277 case SLC_ABORT
: return(&termQuitChar
);
278 case SLC_EOF
: return(&termEofChar
);
279 case SLC_EC
: return(&termEraseChar
);
280 case SLC_EL
: return(&termKillChar
);
281 case SLC_XON
: return(&termStartChar
);
282 case SLC_XOFF
: return(&termStopChar
);
283 case SLC_FORW1
: return(&termForw1Char
);
285 case SLC_FORW2
: return(&termForw2Char
);
287 case SLC_AO
: return(&termFlushChar
);
290 case SLC_SUSP
: return(&termSuspChar
);
293 case SLC_EW
: return(&termWerasChar
);
296 case SLC_RP
: return(&termRprntChar
);
299 case SLC_LNEXT
: return(&termLiteralNextChar
);
302 case SLC_AYT
: return(&termAytChar
);
315 TerminalDefaultChars(void)
320 nttyb
.sg_kill
= ottyb
.sg_kill
;
321 nttyb
.sg_erase
= ottyb
.sg_erase
;
322 #else /* USE_TERMIO */
323 memcpy(new_tc
.c_cc
, old_tc
.c_cc
, sizeof(old_tc
.c_cc
));
325 termFlushChar
= CONTROL('O');
328 termWerasChar
= CONTROL('W');
331 termRprntChar
= CONTROL('R');
334 termLiteralNextChar
= CONTROL('V');
337 termStartChar
= CONTROL('Q');
340 termStopChar
= CONTROL('S');
343 termAytChar
= CONTROL('T');
345 #endif /* USE_TERMIO */
349 * TerminalNewMode - set up terminal to a specific mode.
350 * MODE_ECHO: do local terminal echo
351 * MODE_FLOW: do local flow control
352 * MODE_TRAPSIG: do local mapping to TELNET IAC sequences
353 * MODE_EDIT: do local line editing
356 * MODE_ECHO|MODE_EDIT|MODE_FLOW|MODE_TRAPSIG
360 * local signal mapping
364 * Both Linemode and Single Character mode:
367 * local/no signal mapping
371 TerminalNewMode(int f
)
373 static int prevmode
= 0;
379 #else /* USE_TERMIO */
380 struct termio tmp_tc
;
381 #endif /* USE_TERMIO */
386 globalmode
= f
&~MODE_FORCE
;
391 * Write any outstanding data before switching modes
392 * ttyflush() returns 0 only when there is no more data
393 * left to write out, it returns -1 if it couldn't do
394 * anything at all, otherwise it returns 1 + the number
395 * of characters left to write.
397 * We would really like ask the kernel to wait for the output
398 * to drain, like we can do with the TCSADRAIN, but we don't have
399 * that option. The only ioctl that waits for the output to
400 * drain, TIOCSETP, also flushes the input queue, which is NOT
401 * what we want (TIOCSETP is like TCSADFLUSH).
404 old
= ttyflush(SYNCHing
|flushout
);
405 if (old
< 0 || old
> 1) {
407 tcgetattr(tin
, &tmp_tc
);
408 #endif /* USE_TERMIO */
411 * Wait for data to drain, then flush again.
414 tcsetattr(tin
, TCSADRAIN
, &tmp_tc
);
415 #endif /* USE_TERMIO */
416 old
= ttyflush(SYNCHing
|flushout
);
417 } while (old
< 0 || old
> 1);
421 prevmode
= f
&~MODE_FORCE
;
435 tmp_tc
.c_lflag
|= ECHO
;
436 tmp_tc
.c_oflag
|= ONLCR
;
438 tmp_tc
.c_iflag
|= ICRNL
;
442 sb
.sg_flags
&= ~ECHO
;
444 tmp_tc
.c_lflag
&= ~ECHO
;
445 tmp_tc
.c_oflag
&= ~ONLCR
;
449 if ((f
&MODE_FLOW
) == 0) {
451 tc
.t_startc
= _POSIX_VDISABLE
;
452 tc
.t_stopc
= _POSIX_VDISABLE
;
454 tmp_tc
.c_iflag
&= ~(IXOFF
|IXON
); /* Leave the IXANY bit alone */
456 if (restartany
< 0) {
457 tmp_tc
.c_iflag
|= IXOFF
|IXON
; /* Leave the IXANY bit alone */
458 } else if (restartany
> 0) {
459 tmp_tc
.c_iflag
|= IXOFF
|IXON
|IXANY
;
461 tmp_tc
.c_iflag
|= IXOFF
|IXON
;
462 tmp_tc
.c_iflag
&= ~IXANY
;
467 if ((f
&MODE_TRAPSIG
) == 0) {
469 tc
.t_intrc
= _POSIX_VDISABLE
;
470 tc
.t_quitc
= _POSIX_VDISABLE
;
471 tc
.t_eofc
= _POSIX_VDISABLE
;
472 ltc
.t_suspc
= _POSIX_VDISABLE
;
473 ltc
.t_dsuspc
= _POSIX_VDISABLE
;
475 tmp_tc
.c_lflag
&= ~ISIG
;
480 tmp_tc
.c_lflag
|= ISIG
;
487 sb
.sg_flags
&= ~CBREAK
;
488 sb
.sg_flags
|= CRMOD
;
490 tmp_tc
.c_lflag
|= ICANON
;
494 sb
.sg_flags
|= CBREAK
;
496 sb
.sg_flags
|= CRMOD
;
498 sb
.sg_flags
&= ~CRMOD
;
500 tmp_tc
.c_lflag
&= ~ICANON
;
501 tmp_tc
.c_iflag
&= ~ICRNL
;
502 tmp_tc
.c_cc
[VMIN
] = 1;
503 tmp_tc
.c_cc
[VTIME
] = 0;
507 if ((f
&(MODE_EDIT
|MODE_TRAPSIG
)) == 0) {
509 ltc
.t_lnextc
= _POSIX_VDISABLE
;
512 tmp_tc
.c_cc
[VLNEXT
] = (cc_t
)(_POSIX_VDISABLE
);
517 if (f
&MODE_SOFT_TAB
) {
519 sb
.sg_flags
|= XTABS
;
522 tmp_tc
.c_oflag
|= OXTABS
;
525 tmp_tc
.c_oflag
&= ~TABDLY
;
526 tmp_tc
.c_oflag
|= TAB3
;
531 sb
.sg_flags
&= ~XTABS
;
534 tmp_tc
.c_oflag
&= ~OXTABS
;
537 tmp_tc
.c_oflag
&= ~TABDLY
;
542 if (f
&MODE_LIT_ECHO
) {
547 tmp_tc
.c_lflag
&= ~ECHOCTL
;
555 tmp_tc
.c_lflag
|= ECHOCTL
;
575 tmp_tc
.c_iflag
&= ~ISTRIP
;
577 tmp_tc
.c_iflag
|= ISTRIP
;
578 if (f
& MODE_OUTBIN
) {
579 tmp_tc
.c_cflag
&= ~(CSIZE
|PARENB
);
580 tmp_tc
.c_cflag
|= CS8
;
581 tmp_tc
.c_oflag
&= ~OPOST
;
583 tmp_tc
.c_cflag
&= ~(CSIZE
|PARENB
);
584 tmp_tc
.c_cflag
|= old_tc
.c_cflag
& (CSIZE
|PARENB
);
585 tmp_tc
.c_oflag
|= OPOST
;
593 (void) signal(SIGINT
, intr
);
596 (void) signal(SIGQUIT
, intr2
);
599 (void) signal(SIGTSTP
, susp
);
602 (void) signal(SIGINFO
, ayt
);
604 #if defined(USE_TERMIO) && defined(NOKERNINFO)
605 tmp_tc
.c_lflag
|= NOKERNINFO
;
608 * We don't want to process ^Y here. It's just another
609 * character that we'll pass on to the back end. It has
610 * to process it because it will be processed when the
611 * user attempts to read it, not when we send it.
614 ltc
.t_dsuspc
= _POSIX_VDISABLE
;
617 tmp_tc
.c_cc
[VDSUSP
] = (cc_t
)(_POSIX_VDISABLE
);
622 * If the VEOL character is already set, then use VEOL2,
623 * otherwise use VEOL.
625 esc
= (rlogin
!= _POSIX_VDISABLE
) ? rlogin
: escape
;
626 if ((tmp_tc
.c_cc
[VEOL
] != esc
)
628 && (tmp_tc
.c_cc
[VEOL2
] != esc
)
631 if (tmp_tc
.c_cc
[VEOL
] == (cc_t
)(_POSIX_VDISABLE
))
632 tmp_tc
.c_cc
[VEOL
] = esc
;
634 else if (tmp_tc
.c_cc
[VEOL2
] == (cc_t
)(_POSIX_VDISABLE
))
635 tmp_tc
.c_cc
[VEOL2
] = esc
;
639 if (tc
.t_brkc
== (cc_t
)(_POSIX_VDISABLE
))
644 (void) signal(SIGINFO
, (void (*)(int))ayt_status
);
647 (void) signal(SIGINT
, SIG_DFL
);
650 (void) signal(SIGQUIT
, SIG_DFL
);
653 (void) signal(SIGTSTP
, SIG_DFL
);
655 (void) sigsetmask(sigblock(0) & ~(1<<(SIGTSTP
-1)));
657 (void) sigrelse(SIGTSTP
);
670 ioctl(tin
, TIOCLSET
, (char *)&lmode
);
671 ioctl(tin
, TIOCSLTC
, (char *)<c
);
672 ioctl(tin
, TIOCSETC
, (char *)&tc
);
673 ioctl(tin
, TIOCSETN
, (char *)&sb
);
675 if (tcsetattr(tin
, TCSADRAIN
, &tmp_tc
) < 0)
676 tcsetattr(tin
, TCSANOW
, &tmp_tc
);
679 ioctl(tin
, FIONBIO
, (char *)&onoff
);
680 ioctl(tout
, FIONBIO
, (char *)&onoff
);
685 * Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD).
701 # define B19200 B14400
705 #define B28800 B19200
709 # define B38400 B28800
713 #define B57600 B38400
717 #define B76800 B57600
721 #define B115200 B76800
725 #define B230400 B115200
730 * This code assumes that the values B0, B50, B75...
731 * are in ascending order. They do not have to be
738 { 0, B0
}, { 50, B50
}, { 75, B75
},
739 { 110, B110
}, { 134, B134
}, { 150, B150
},
740 { 200, B200
}, { 300, B300
}, { 600, B600
},
741 { 1200, B1200
}, { 1800, B1800
}, { 2400, B2400
},
742 { 4800, B4800
}, { 7200, B7200
}, { 9600, B9600
},
743 { 14400, B14400
}, { 19200, B19200
}, { 28800, B28800
},
744 { 38400, B38400
}, { 57600, B57600
}, { 115200, B115200
},
745 { 230400, B230400
}, { -1, B230400
}
747 #endif /* DECODE_BAUD */
750 TerminalSpeeds(long *ispeed
, long *ospeed
)
753 struct termspeeds
*tp
;
754 #endif /* DECODE_BAUD */
757 out
= cfgetospeed(&old_tc
);
758 in
= cfgetispeed(&old_tc
);
764 while ((tp
->speed
!= -1) && (tp
->value
< in
))
769 while ((tp
->speed
!= -1) && (tp
->value
< out
))
772 #else /* DECODE_BAUD */
775 #endif /* DECODE_BAUD */
779 TerminalWindowSize(long *rows
, long *cols
)
784 if (ioctl(fileno(stdin
), TIOCGWINSZ
, (char *)&ws
) >= 0) {
789 #endif /* TIOCGWINSZ */
800 NetNonblockingIO(int fd
, int onoff
)
802 ioctl(fd
, FIONBIO
, (char *)&onoff
);
807 * Various signal handling routines.
812 deadpeer(int sig __unused
)
815 longjmp(peerdied
, -1);
820 intr(int sig __unused
)
827 longjmp(toplevel
, -1);
832 intr2(int sig __unused
)
835 #ifdef KLUDGELINEMODE
848 susp(int sig __unused
)
850 if ((rlogin
!= _POSIX_VDISABLE
) && rlogin_susp())
860 sendwin(int sig __unused
)
871 ayt(int sig __unused
)
882 sys_telnet_init(void)
884 (void) signal(SIGINT
, intr
);
885 (void) signal(SIGQUIT
, intr2
);
886 (void) signal(SIGPIPE
, deadpeer
);
888 (void) signal(SIGWINCH
, sendwin
);
891 (void) signal(SIGTSTP
, susp
);
894 (void) signal(SIGINFO
, ayt
);
899 NetNonblockingIO(net
, 1);
901 #if defined(SO_OOBINLINE)
902 if (SetSockOpt(net
, SOL_SOCKET
, SO_OOBINLINE
, 1) == -1) {
903 perror("SetSockOpt");
905 #endif /* defined(SO_OOBINLINE) */
911 * This routine tries to fill up/empty our various rings.
913 * The parameter specifies whether this is a poll operation,
914 * or a block-until-something-happens operation.
916 * The return value is 1 if something happened, 0 if not.
920 process_rings(int netin
, int netout
, int netex
, int ttyin
, int ttyout
, int poll
)
924 static struct timeval TimeValue
= { 0, 0 };
928 if ((netout
|| netin
|| netex
) && net
> maxfd
)
931 if (ttyout
&& tout
> maxfd
)
933 if (ttyin
&& tin
> maxfd
)
935 tmp
= howmany(maxfd
+1, NFDBITS
) * sizeof(fd_mask
);
945 if ((ibitsp
= (fd_set
*)malloc(fdsn
)) == NULL
)
947 if ((obitsp
= (fd_set
*)malloc(fdsn
)) == NULL
)
949 if ((xbitsp
= (fd_set
*)malloc(fdsn
)) == NULL
)
951 memset(ibitsp
, 0, fdsn
);
952 memset(obitsp
, 0, fdsn
);
953 memset(xbitsp
, 0, fdsn
);
959 FD_SET(tout
, obitsp
);
966 if ((c
= select(maxfd
+ 1, ibitsp
, obitsp
, xbitsp
,
967 (poll
== 0)? NULL
: &TimeValue
)) < 0) {
970 * we can get EINTR if we are in line mode,
971 * and the user does an escape (TSTP), or
972 * some other signal generator.
974 if (errno
== EINTR
) {
977 /* I don't like this, does it ever happen? */
978 printf("sleep(5) from telnet, after select: %s\r\n", strerror(errno
));
987 if (FD_ISSET(net
, xbitsp
)) {
990 (void) ttyflush(1); /* flush already enqueued data */
994 * Something to read from the network...
996 if (FD_ISSET(net
, ibitsp
)) {
1000 canread
= ring_empty_consecutive(&netiring
);
1001 #if !defined(SO_OOBINLINE)
1003 * In 4.2 (and some early 4.3) systems, the
1004 * OOB indication and data handling in the kernel
1005 * is such that if two separate TCP Urgent requests
1006 * come in, one byte of TCP data will be overlaid.
1007 * This is fatal for Telnet, but we try to live
1010 * In addition, in 4.2 (and...), a special protocol
1011 * is needed to pick up the TCP Urgent data in
1012 * the correct sequence.
1014 * What we do is: if we think we are in urgent
1015 * mode, we look to see if we are "at the mark".
1016 * If we are, we do an OOB receive. If we run
1017 * this twice, we will do the OOB receive twice,
1018 * but the second will fail, since the second
1019 * time we were "at the mark", but there wasn't
1020 * any data there (the kernel doesn't reset
1021 * "at the mark" until we do a normal read).
1022 * Once we've read the OOB data, we go ahead
1023 * and do normal reads.
1025 * There is also another problem, which is that
1026 * since the OOB byte we read doesn't put us
1027 * out of OOB state, and since that byte is most
1028 * likely the TELNET DM (data mark), we would
1029 * stay in the TELNET SYNCH (SYNCHing) state.
1030 * So, clocks to the rescue. If we've "just"
1031 * received a DM, then we test for the
1032 * presence of OOB data when the receive OOB
1033 * fails (and AFTER we did the normal mode read
1034 * to clear "at the mark").
1038 static int bogus_oob
= 0, first
= 1;
1040 ioctl(net
, SIOCATMARK
, (char *)&atmark
);
1042 c
= recv(net
, netiring
.supply
, canread
, MSG_OOB
);
1043 if ((c
== -1) && (errno
== EINVAL
)) {
1044 c
= recv(net
, netiring
.supply
, canread
, 0);
1045 if (clocks
.didnetreceive
< clocks
.gotDM
) {
1046 SYNCHing
= stilloob(net
);
1048 } else if (first
&& c
> 0) {
1050 * Bogosity check. Systems based on 4.2BSD
1051 * do not return an error if you do a second
1052 * recv(MSG_OOB). So, we do one. If it
1053 * succeeds and returns exactly the same
1054 * data, then assume that we are running
1055 * on a broken system and set the bogus_oob
1056 * flag. (If the data was different, then
1057 * we probably got some valid new data, so
1058 * increment the count...)
1061 i
= recv(net
, netiring
.supply
+ c
, canread
- c
, MSG_OOB
);
1063 memcmp(netiring
.supply
, netiring
.supply
+ c
, i
) == 0) {
1072 if (bogus_oob
&& c
> 0) {
1075 * Bogosity. We have to do the read
1076 * to clear the atmark to get out of
1079 i
= read(net
, netiring
.supply
+ c
, canread
- c
);
1084 c
= recv(net
, netiring
.supply
, canread
, 0);
1087 c
= recv(net
, netiring
.supply
, canread
, 0);
1089 settimer(didnetreceive
);
1090 #else /* !defined(SO_OOBINLINE) */
1091 c
= recv(net
, (char *)netiring
.supply
, canread
, 0);
1092 #endif /* !defined(SO_OOBINLINE) */
1093 if (c
< 0 && errno
== EWOULDBLOCK
) {
1095 } else if (c
<= 0) {
1099 Dump('<', netiring
.supply
, c
);
1102 ring_supplied(&netiring
, c
);
1107 * Something to read from the tty...
1109 if (FD_ISSET(tin
, ibitsp
)) {
1110 FD_CLR(tin
, ibitsp
);
1111 c
= TerminalRead(ttyiring
.supply
, ring_empty_consecutive(&ttyiring
));
1112 if (c
< 0 && errno
== EIO
)
1114 if (c
< 0 && errno
== EWOULDBLOCK
) {
1117 /* EOF detection for line mode!!!! */
1118 if ((c
== 0) && MODE_LOCAL_CHARS(globalmode
) && isatty(tin
)) {
1119 /* must be an EOF... */
1120 *ttyiring
.supply
= termEofChar
;
1127 Dump('<', ttyiring
.supply
, c
);
1129 ring_supplied(&ttyiring
, c
);
1131 returnValue
= 1; /* did something useful */
1134 if (FD_ISSET(net
, obitsp
)) {
1135 FD_CLR(net
, obitsp
);
1136 returnValue
|= netflush();
1138 if (FD_ISSET(tout
, obitsp
)) {
1139 FD_CLR(tout
, obitsp
);
1140 returnValue
|= (ttyflush(SYNCHing
|flushout
) > 0);