-
Notifications
You must be signed in to change notification settings - Fork 0
/
exp_inter.c
2263 lines (1941 loc) · 59.4 KB
/
exp_inter.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* interact (using select) - give user keyboard control
Written by: Don Libes, NIST, 2/6/90
Design and implementation of this program was paid for by U.S. tax
dollars. Therefore it is public domain. However, the author and NIST
would appreciate credit if this program or parts of it are used.
*/
#include "expect_cf.h"
#include <stdio.h>
#ifdef HAVE_INTTYPES_H
# include <inttypes.h>
#endif
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#include <ctype.h>
#include "tclInt.h"
#include "string.h"
#include "exp_tty_in.h"
#include "exp_rename.h"
#include "exp_prog.h"
#include "exp_command.h"
#include "exp_log.h"
#include "exp_event.h" /* exp_get_next_event decl */
/* Tcl 8.5+ moved this internal - needed for when I compile expect against 8.5. */
#ifndef TCL_REG_BOSONLY
#define TCL_REG_BOSONLY 002000
#endif
typedef struct ThreadSpecificData {
Tcl_Obj *cmdObjReturn;
Tcl_Obj *cmdObjInterpreter;
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;
#define INTER_OUT "interact_out"
#define out(var,val) \
expDiagLog("interact: set %s(%s) ",INTER_OUT,var); \
expDiagLogU(expPrintify(val)); \
expDiagLogU("\"\r\n"); \
Tcl_SetVar2(interp,INTER_OUT,var,val,0);
/*
* tests if we are running this using a real tty
*
* these tests are currently only used to control what gets written to the
* logfile. Note that removal of the test of "..._is_tty" means that stdin
* or stdout could be redirected and yet stdout would still be logged.
* However, it's not clear why anyone would use log_file when these are
* redirected in the first place. On the other hand, it is reasonable to
* run expect as a daemon in which case, stdin/out do not appear to be
* ttys, yet it makes sense for them to be logged with log_file as if they
* were.
*/
#if 0
#define real_tty_output(x) (exp_stdout_is_tty && (((x)==1) || ((x)==exp_dev_tty)))
#define real_tty_input(x) (exp_stdin_is_tty && (((x)==0) || ((x)==exp_dev_tty)))
#endif
#define real_tty_output(x) ((x->fdout == 1) || (expDevttyIs(x)))
#define real_tty_input(x) (exp_stdin_is_tty && ((x->fdin==0) || (expDevttyIs(x))))
#define new(x) (x *)ckalloc(sizeof(x))
struct action {
Tcl_Obj *statement;
int tty_reset; /* if true, reset tty mode upon action */
int iread; /* if true, reread indirects */
int iwrite; /* if true, write spawn_id element */
struct action *next; /* chain only for later for freeing */
};
struct keymap {
Tcl_Obj *keys; /* original pattern provided by user */
int re; /* true if looking to match a regexp. */
int null; /* true if looking to match 0 byte */
int case_sensitive;
int echo; /* if keystrokes should be echoed */
int writethru; /* if keystrokes should go through to process */
int indices; /* true if should write indices */
struct action action;
struct keymap *next;
};
struct output {
struct exp_i *i_list;
struct action *action_eof;
struct output *next;
};
struct input {
struct exp_i *i_list;
struct output *output;
struct action *action_eof;
struct action *action_timeout;
struct keymap *keymap;
int timeout_nominal; /* timeout nominal */
int timeout_remaining; /* timeout remaining */
struct input *next;
};
/*
* Once we are handed an ExpState from the event handler, we can figure out
* which "struct input *" it references by using expStateToInput. This has is
* populated by expCreateStateToInput.
*/
struct input *
expStateToInput(
Tcl_HashTable *hash,
ExpState *esPtr)
{
Tcl_HashEntry *entry = Tcl_FindHashEntry(hash,(char *)esPtr);
if (!entry) {
/* should never happen */
return 0;
}
return ((struct input *)Tcl_GetHashValue(entry));
}
void
expCreateStateToInput(
Tcl_HashTable *hash,
ExpState *esPtr,
struct input *inp)
{
Tcl_HashEntry *entry;
int newPtr;
entry = Tcl_CreateHashEntry(hash,(char *)esPtr,&newPtr);
Tcl_SetHashValue(entry,(ClientData)inp);
}
static void free_input(Tcl_Interp *interp, struct input *i);
static void free_keymap(struct keymap *km);
static void free_output(Tcl_Interp *interp, struct output *o);
static void free_action(struct action *a);
static struct action *new_action(struct action **base);
static int inter_eval(
Tcl_Interp *interp,
struct action *action,
ExpState *esPtr);
/* intMatch() accepts user keystrokes and returns one of MATCH,
CANMATCH, or CANTMATCH. These describe whether the keystrokes match a
key sequence, and could or can't if more characters arrive. The
function assigns a matching keymap if there is a match or can-match.
A matching keymap is assigned on can-match so we know whether to echo
or not.
intMatch is optimized (if you can call it that) towards a small
number of key mappings, but still works well for large maps, since no
function calls are made, and we stop as soon as there is a single-char
mismatch, and go on to the next one. A hash table or compiled DFA
probably would not buy very much here for most maps.
The basic idea of how this works is it does a smart sequential search.
At each position of the input string, we attempt to match each of the
keymaps. If at least one matches, the first match is returned.
If there is a CANMATCH and there are more keymaps to try, we continue
trying. If there are no more keymaps to try, we stop trying and
return with an indication of the first keymap that can match.
Note that I've hacked up the regexp pattern matcher in two ways. One
is to force the pattern to always be anchored at the front. That way,
it doesn't waste time attempting to match later in the string (before
we're ready). The other is to return can-match.
*/
static int
intMatch(
ExpState *esPtr,
struct keymap *keymap, /* linked list of keymaps */
struct keymap **km_match, /* keymap that matches or can match */
int *matchLen, /* # of bytes that matched */
int *skip, /* # of chars to skip */
Tcl_RegExpInfo *info)
{
Tcl_UniChar *string;
struct keymap *km;
char *ks; /* string from a keymap */
Tcl_UniChar *start_search; /* where in string to start searching */
int offset; /* # of chars from string to start searching */
Tcl_UniChar *string_end;
int numchars;
int rm_nulls; /* skip nulls if true */
Tcl_UniChar ch;
string = esPtr->input.buffer;
numchars = esPtr->input.use; /* Actually #chars */
/* assert (*km == 0) */
/* a shortcut that should help master output which typically */
/* is lengthy and has no key maps. Otherwise it would mindlessly */
/* iterate on each character anyway. */
if (!keymap) {
*skip = numchars;
return(EXP_CANTMATCH);
}
rm_nulls = esPtr->rm_nulls;
string_end = string + numchars;
/*
* Maintain both a character index and a string pointer so we
* can easily index into either the UTF or the Unicode representations.
*/
for (start_search = string, offset = 0;
start_search < string_end;
start_search ++, offset++) {
ch = *start_search;
if (*km_match) break; /* if we've already found a CANMATCH */
/* don't bother starting search from positions */
/* further along the string */
for (km=keymap;km;km=km->next) {
Tcl_UniChar *s; /* current character being examined */
if (km->null) {
if (ch == 0) {
*skip = start_search-string;
*matchLen = 1; /* s - start_search == 1 */
*km_match = km;
return(EXP_MATCH);
}
} else if (!km->re) {
int kslen;
Tcl_UniChar sch, ksch;
/* fixed string */
ks = Tcl_GetString(km->keys);
for (s = start_search;; s++, ks += kslen) {
/* if we hit the end of this map, must've matched! */
if (*ks == 0) {
*skip = start_search-string;
*matchLen = s-start_search;
*km_match = km;
return(EXP_MATCH);
}
/* if we ran out of user-supplied characters, and */
/* still haven't matched, it might match if the user */
/* supplies more characters next time */
if (s == string_end) {
/* skip to next key entry, but remember */
/* possibility that this entry might match */
if (!*km_match) *km_match = km;
break;
}
sch = *s;
kslen = Tcl_UtfToUniChar(ks, &ksch);
if (sch == ksch) continue;
if ((sch == '\0') && rm_nulls) {
kslen = 0;
continue;
}
break;
}
} else {
/* regexp */
Tcl_RegExp re;
int flags;
int result;
Tcl_Obj* buf;
re = Tcl_GetRegExpFromObj(NULL, km->keys,
TCL_REG_ADVANCED|TCL_REG_BOSONLY|TCL_REG_CANMATCH);
flags = (offset > 0) ? TCL_REG_NOTBOL : 0;
/* ZZZ: Future optimization: Avoid copying */
buf = Tcl_NewUnicodeObj (esPtr->input.buffer, esPtr->input.use);
Tcl_IncrRefCount (buf);
result = Tcl_RegExpExecObj(NULL, re, buf, offset,
-1 /* nmatches */, flags);
Tcl_DecrRefCount (buf);
if (result > 0) {
*km_match = km;
*skip = start_search-string;
Tcl_RegExpGetInfo(re, info);
*matchLen = info->matches[0].end;
return EXP_MATCH;
} else if (result == 0) {
Tcl_RegExpGetInfo(re, info);
/*
* Check to see if there was a partial match starting
* at the current character.
*/
if (info->extendStart == 0) {
if (!*km_match) *km_match = km;
}
}
}
}
}
if (*km_match) {
/* report CANMATCH for -re and -ex */
/*
* since canmatch is only detected after we've advanced too far,
* adjust start_search back to make other computations simpler
*/
start_search--;
*skip = start_search - string;
*matchLen = string_end - start_search;
return(EXP_CANMATCH);
}
*skip = start_search-string;
return(EXP_CANTMATCH);
}
/* put regexp result in variables */
static void
intRegExpMatchProcess(
Tcl_Interp *interp,
ExpState *esPtr,
struct keymap *km, /* ptr for above while parsing */
Tcl_RegExpInfo *info,
int offset)
{
char name[20], value[20];
int i;
Tcl_Obj* buf = Tcl_NewUnicodeObj (esPtr->input.buffer,esPtr->input.use);
for (i=0;i<=info->nsubs;i++) {
int start, end;
Tcl_Obj *val;
start = info->matches[i].start + offset;
if (start == -1) continue;
end = (info->matches[i].end-1) + offset;
if (km->indices) {
/* start index */
sprintf(name,"%d,start",i);
sprintf(value,"%d",start);
out(name,value);
/* end index */
sprintf(name,"%d,end",i);
sprintf(value,"%d",end);
out(name,value);
}
/* string itself */
sprintf(name,"%d,string",i);
val = Tcl_GetRange(buf, start, end);
expDiagLog("interact: set %s(%s) \"",INTER_OUT,name);
expDiagLogU(expPrintifyObj(val));
expDiagLogU("\"\r\n");
Tcl_SetVar2Ex(interp,INTER_OUT,name,val,0);
}
Tcl_DecrRefCount (buf);
}
/*
* echo chars
*/
static void
intEcho(
ExpState *esPtr,
int skipBytes,
int matchBytes)
{
int seenBytes; /* either printed or echoed */
int echoBytes;
int offsetBytes;
/* write is unlikely to fail, since we just read from same descriptor */
seenBytes = esPtr->printed + esPtr->echoed;
if (skipBytes >= seenBytes) {
echoBytes = matchBytes;
offsetBytes = skipBytes;
} else if ((matchBytes + skipBytes - seenBytes) > 0) {
echoBytes = matchBytes + skipBytes - seenBytes;
offsetBytes = seenBytes;
}
(void) expWriteCharsUni(esPtr,
esPtr->input.buffer + offsetBytes,
echoBytes);
esPtr->echoed = matchBytes + skipBytes - esPtr->printed;
}
/*
* intRead() does the logical equivalent of a read() for the interact command.
* Returns # of bytes read or negative number (EXP_XXX) indicating unusual event.
*/
static int
intRead(
Tcl_Interp *interp,
ExpState *esPtr,
int warnOnBufferFull,
int interruptible,
int key)
{
Tcl_UniChar *eobOld; /* old end of buffer */
int cc;
int numchars;
Tcl_UniChar *str;
str = esPtr->input.buffer;
numchars = esPtr->input.use;
eobOld = str + numchars;
/* We drop one third when are at least 2/3 full */
/* condition is (size >= max*2/3) <=> (size*3 >= max*2) */
if (numchars*3 >= esPtr->input.max*2) {
/*
* In theory, interact could be invoked when this situation
* already exists, hence the "probably" in the warning below
*/
if (warnOnBufferFull) {
expDiagLogU("WARNING: interact buffer is full, probably because your\r\n");
expDiagLogU("patterns have matched all of it but require more chars\r\n");
expDiagLogU("in order to complete the match.\r\n");
expDiagLogU("Dumping first half of buffer in order to continue\r\n");
expDiagLogU("Recommend you enlarge the buffer or fix your patterns.\r\n");
}
exp_buffer_shuffle(interp,esPtr,0,INTER_OUT,"interact");
}
if (!interruptible) {
cc = Tcl_ReadChars(esPtr->channel, esPtr->input.newchars,
esPtr->input.max - esPtr->input.use,
0 /* no append */);
} else {
#ifdef SIMPLE_EVENT
cc = intIRead(esPtr->channel, esPtr->input.newchars,
esPtr->input.max - esPtr->input.use,
0 /* no append */);
#endif
}
if (cc > 0) {
memcpy (esPtr->input.buffer + esPtr->input.use,
Tcl_GetUnicodeFromObj (esPtr->input.newchars, NULL),
cc * sizeof (Tcl_UniChar));
esPtr->input.use += cc;
expDiagLog("spawn id %s sent <",esPtr->name);
expDiagLogU(expPrintifyUni(eobOld,cc));
expDiagLogU(">\r\n");
esPtr->key = key;
}
return cc;
}
#ifdef SIMPLE_EVENT
/*
The way that the "simple" interact works is that the original Expect
process reads from the tty and writes to the spawned process. A child
process is forked to read from the spawned process and write to the
tty. It looks like this:
user
--> tty >--
/ \
^ v
child original
process Expect
^ process
| v
\ /
< spawned <
process
*/
#ifndef WEXITSTATUS
#define WEXITSTATUS(stat) (((*((int *) &(stat))) >> 8) & 0xff)
#endif
#include <setjmp.h>
#ifdef HAVE_SIGLONGJMP
static sigjmp_buf env; /* for interruptable read() */
#else
static jmp_buf env; /* for interruptable read() */
#endif /* HAVE_SIGLONGJMP */
static int reading; /* while we are reading */
/* really, while "env" is valid */
static int deferred_interrupt = FALSE; /* if signal is received, but not */
/* in expIRead record this here, so it will */
/* be handled next time through expIRead */
static void
sigchld_handler()
{
if (reading) {
#ifdef HAVE_SIGLONGJMP
siglongjmp(env,1);
#else
longjmp(env,1);
#endif /* HAVE_SIGLONGJMP */
}
deferred_interrupt = TRUE;
}
#define EXP_CHILD_EOF -100
/*
* Name: expIRead, do an interruptable read
*
* intIRead() reads from chars from the user.
*
* It returns early if it detects the death of a proc (either the spawned
* process or the child (surrogate).
*/
static int
intIRead(
Tcl_Channel channel,
Tcl_Obj *obj,
int size,
int flags)
{
int cc = EXP_CHILD_EOF;
if (deferred_interrupt) return(cc);
if (
#ifdef HAVE_SIGLONGJMP
0 == sigsetjmp(env,1)
#else
0 == setjmp(env)
#endif /* HAVE_SIGLONGJMP */
) {
reading = TRUE;
cc = Tcl_ReadChars(channel,obj,size,flags);
}
reading = FALSE;
return(cc);
}
/* exit status for the child process created by cmdInteract */
#define CHILD_DIED -2
#define SPAWNED_PROCESS_DIED -3
static void
clean_up_after_child(
Tcl_Interp *interp,
ExpState *esPtr)
{
expWaitOnOne(); /* wait for slave */
expWaitOnOne(); /* wait for child */
deferred_interrupt = FALSE;
if (esPtr->close_on_eof) {
exp_close(interp,esPtr);
}
}
#endif /*SIMPLE_EVENT*/
static int
update_interact_fds(
Tcl_Interp *interp,
int *esPtrCount,
Tcl_HashTable **esPtrToInput, /* map from ExpStates to "struct inputs" */
ExpState ***esPtrs,
struct input *input_base,
int do_indirect, /* if true do indirects */
int *config_count,
int *real_tty_caller)
{
struct input *inp;
struct output *outp;
struct exp_state_list *fdp;
int count;
int real_tty = FALSE;
*config_count = exp_configure_count;
count = 0;
for (inp = input_base;inp;inp=inp->next) {
if (do_indirect) {
/* do not update "direct" entries (again) */
/* they were updated upon creation */
if (inp->i_list->direct == EXP_INDIRECT) {
exp_i_update(interp,inp->i_list);
}
for (outp = inp->output;outp;outp=outp->next) {
if (outp->i_list->direct == EXP_INDIRECT) {
exp_i_update(interp,outp->i_list);
}
}
}
/* revalidate all input descriptors */
for (fdp = inp->i_list->state_list;fdp;fdp=fdp->next) {
count++;
/* have to "adjust" just in case spawn id hasn't had */
/* a buffer sized yet */
if (!expStateCheck(interp,fdp->esPtr,1,1,"interact")) {
return(TCL_ERROR);
}
}
/* revalidate all output descriptors */
for (outp = inp->output;outp;outp=outp->next) {
for (fdp = outp->i_list->state_list;fdp;fdp=fdp->next) {
/* make user_spawn_id point to stdout */
if (!expStdinoutIs(fdp->esPtr)) {
if (!expStateCheck(interp,fdp->esPtr,1,0,"interact"))
return(TCL_ERROR);
}
}
}
}
if (!do_indirect) return TCL_OK;
if (*esPtrToInput == 0) {
*esPtrToInput = (Tcl_HashTable *)ckalloc(sizeof(Tcl_HashTable));
*esPtrs = (ExpState **)ckalloc(count * sizeof(ExpState *));
} else {
/* if hash table already exists, delete it and start over */
Tcl_DeleteHashTable(*esPtrToInput);
*esPtrs = (ExpState **)ckrealloc((char *)*esPtrs,count * sizeof(ExpState *));
}
Tcl_InitHashTable(*esPtrToInput,TCL_ONE_WORD_KEYS);
count = 0;
for (inp = input_base;inp;inp=inp->next) {
for (fdp = inp->i_list->state_list;fdp;fdp=fdp->next) {
/* build map to translate from spawn_id to struct input */
expCreateStateToInput(*esPtrToInput,fdp->esPtr,inp);
/* build input to ready() */
(*esPtrs)[count] = fdp->esPtr;
if (real_tty_input(fdp->esPtr)) real_tty = TRUE;
count++;
}
}
*esPtrCount = count;
*real_tty_caller = real_tty; /* tell caller if we have found that */
/* we are using real tty */
return TCL_OK;
}
/*ARGSUSED*/
static char *
inter_updateproc(
ClientData clientData,
Tcl_Interp *interp, /* Interpreter containing variable. */
char *name1, /* Name of variable. */
char *name2, /* Second part of variable name. */
int flags) /* Information about what happened. */
{
exp_configure_count++;
return 0;
}
#define finish(x) { status = x; goto done; }
static char return_cmd[] = "return";
static char interpreter_cmd[] = "interpreter";
/*ARGSUSED*/
int
Exp_InteractObjCmd(
ClientData clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST initial_objv[]) /* Argument objects. */
{
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
Tcl_Obj *CONST *objv_copy; /* original, for error messages */
Tcl_Obj **objv = (Tcl_Obj **) initial_objv;
char *string;
Tcl_UniChar *ustring;
#ifdef SIMPLE_EVENT
int pid;
#endif /*SIMPLE_EVENT*/
/*declarations*/
int input_count; /* count of struct input descriptors */
Tcl_HashTable *esPtrToInput = 0; /* map from ExpState to "struct inputs" */
ExpState **esPtrs;
struct keymap *km; /* ptr for above while parsing */
Tcl_RegExpInfo reInfo;
ExpState *u = 0;
ExpState *esPtr = 0;
Tcl_Obj *chanName = 0;
int need_to_close_master = FALSE; /* if an eof is received */
/* we use this to defer close until later */
int next_tty_reset = FALSE; /* if we've seen a single -reset */
int next_iread = FALSE;/* if we've seen a single -iread */
int next_iwrite = FALSE;/* if we've seen a single -iread */
int next_re = FALSE; /* if we've seen a single -re */
int next_null = FALSE; /* if we've seen the null keyword */
int next_writethru = FALSE;/*if macros should also go to proc output */
int next_indices = FALSE;/* if we should write indices */
int next_echo = FALSE; /* if macros should be echoed */
int status = TCL_OK; /* final return value */
int i; /* misc temp */
int size; /* size temp */
int timeout_simple = TRUE; /* if no or global timeout */
int real_tty; /* TRUE if we are interacting with real tty */
int tty_changed = FALSE;/* true if we had to change tty modes for */
/* interact to work (i.e., to raw, noecho) */
int was_raw;
int was_echo;
exp_tty tty_old;
Tcl_Obj *replace_user_by_process = 0; /* for -u flag */
struct input *input_base;
#define input_user input_base
struct input *input_default;
struct input *inp; /* overused ptr to struct input */
struct output *outp; /* overused ptr to struct output */
int dash_input_count = 0; /* # of "-input"s seen */
int dash_o_count = 0; /* # of "-o"s seen */
int arbitrary_timeout;
int default_timeout;
struct action action_timeout; /* common to all */
struct action action_eof; /* common to all */
struct action **action_eof_ptr; /* allow -input/ouput to */
/* leave their eof-action assignable by a later */
/* -eof */
struct action *action_base = 0;
struct keymap **end_km;
int key;
int configure_count; /* monitor reconfigure events */
Tcl_Obj* new_cmd = NULL;
if ((objc == 2) && exp_one_arg_braced(objv[1])) {
/* expect {...} */
new_cmd = exp_eval_with_one_arg(clientData,interp,objv);
if (!new_cmd) return TCL_ERROR;
/* Replace old arguments with result of reparse */
Tcl_ListObjGetElements (interp, new_cmd, &objc, &objv);
} else if ((objc == 3) && streq(Tcl_GetString(objv[1]),"-brace")) {
/* expect -brace {...} ... fake command line for reparsing */
Tcl_Obj *new_objv[2];
new_objv[0] = objv[0];
new_objv[1] = objv[2];
new_cmd = exp_eval_with_one_arg(clientData,interp,new_objv);
if (!new_cmd) return TCL_ERROR;
/* Replace old arguments with result of reparse */
Tcl_ListObjGetElements (interp, new_cmd, &objc, &objv);
}
objv_copy = objv;
objv++;
objc--;
default_timeout = EXP_TIME_INFINITY;
arbitrary_timeout = EXP_TIME_INFINITY; /* if user specifies */
/* a bunch of timeouts with EXP_TIME_INFINITY, this will be */
/* left around for us to find. */
input_user = new(struct input);
input_user->i_list = exp_new_i_simple(expStdinoutGet(),EXP_TEMPORARY); /* stdin by default */
input_user->output = 0;
input_user->action_eof = &action_eof;
input_user->timeout_nominal = EXP_TIME_INFINITY;
input_user->action_timeout = 0;
input_user->keymap = 0;
end_km = &input_user->keymap;
inp = input_user;
action_eof_ptr = &input_user->action_eof;
input_default = new(struct input);
input_default->i_list = exp_new_i_simple((ExpState *)0,EXP_TEMPORARY); /* fix up later */
input_default->output = 0;
input_default->action_eof = &action_eof;
input_default->timeout_nominal = EXP_TIME_INFINITY;
input_default->action_timeout = 0;
input_default->keymap = 0;
input_default->next = 0; /* no one else */
input_user->next = input_default;
/* default and common -eof action */
action_eof.statement = tsdPtr->cmdObjReturn;
action_eof.tty_reset = FALSE;
action_eof.iread = FALSE;
action_eof.iwrite = FALSE;
/*
* Parse the command arguments.
*/
for (;objc>0;objc--,objv++) {
string = Tcl_GetString(*objv);
if (string[0] == '-') {
static char *switches[] = {
"--", "-exact", "-re", "-input",
"-output", "-u", "-o", "-i",
"-echo", "-nobuffer", "-indices", "-f",
"-reset", "-F", "-iread", "-iwrite",
"-eof", "-timeout", "-nobrace", (char *)0
};
enum switches {
EXP_SWITCH_DASH, EXP_SWITCH_EXACT,
EXP_SWITCH_REGEXP, EXP_SWITCH_INPUT,
EXP_SWITCH_OUTPUT, EXP_SWITCH_USER,
EXP_SWITCH_OPPOSITE, EXP_SWITCH_SPAWN_ID,
EXP_SWITCH_ECHO, EXP_SWITCH_NOBUFFER,
EXP_SWITCH_INDICES, EXP_SWITCH_FAST,
EXP_SWITCH_RESET, EXP_SWITCH_CAPFAST,
EXP_SWITCH_IREAD, EXP_SWITCH_IWRITE,
EXP_SWITCH_EOF, EXP_SWITCH_TIMEOUT,
EXP_SWITCH_NOBRACE
};
int index;
/*
* Allow abbreviations of switches and report an error if we
* get an invalid switch.
*/
if (Tcl_GetIndexFromObj(interp, *objv, switches, "switch", 0,
&index) != TCL_OK) {
goto error;
}
switch ((enum switches) index) {
case EXP_SWITCH_DASH:
case EXP_SWITCH_EXACT:
objc--;
objv++;
goto pattern;
case EXP_SWITCH_REGEXP:
if (objc < 1) {
Tcl_WrongNumArgs(interp,1,objv_copy,"-re pattern");
goto error;
}
next_re = TRUE;
objc--;
objv++;
/*
* Try compiling the expression so we can report
* any errors now rather then when we first try to
* use it.
*/
if (!(Tcl_GetRegExpFromObj(interp, *objv,
TCL_REG_ADVANCED|TCL_REG_BOSONLY))) {
goto error;
}
goto pattern;
case EXP_SWITCH_INPUT:
dash_input_count++;
if (dash_input_count == 2) {
inp = input_default;
input_user->next = input_default;
} else if (dash_input_count > 2) {
struct input *previous_input = inp;
inp = new(struct input);
previous_input->next = inp;
}
inp->output = 0;
inp->action_eof = &action_eof;
action_eof_ptr = &inp->action_eof;
inp->timeout_nominal = default_timeout;
inp->action_timeout = &action_timeout;
inp->keymap = 0;
end_km = &inp->keymap;
inp->next = 0;
objc--;objv++;
if (objc < 1) {
Tcl_WrongNumArgs(interp,1,objv_copy,"-input spawn_id");
goto error;
}
inp->i_list = exp_new_i_complex(interp,Tcl_GetString(*objv),
EXP_TEMPORARY,inter_updateproc);
if (!inp->i_list) {
goto error;
}
break;
case EXP_SWITCH_OUTPUT: {
struct output *tmp;
/* imply a "-input" */
if (dash_input_count == 0) dash_input_count = 1;
outp = new(struct output);
/* link new output in front of others */
tmp = inp->output;
inp->output = outp;
outp->next = tmp;
objc--;objv++;
if (objc < 1) {
Tcl_WrongNumArgs(interp,1,objv_copy,"-output spawn_id");
goto error;
}
outp->i_list = exp_new_i_complex(interp,Tcl_GetString(*objv),
EXP_TEMPORARY,inter_updateproc);
if (!outp->i_list) {
goto error;
}
outp->action_eof = &action_eof;
action_eof_ptr = &outp->action_eof;
break;
}
case EXP_SWITCH_USER:
objc--;objv++;
if (objc < 1) {
Tcl_WrongNumArgs(interp,1,objv_copy,"-u spawn_id");
goto error;
}
replace_user_by_process = *objv;
/* imply a "-input" */
if (dash_input_count == 0) dash_input_count = 1;
break;
case EXP_SWITCH_OPPOSITE:
/* apply following patterns to opposite side */
/* of interaction */
end_km = &input_default->keymap;
if (dash_o_count > 0) {
exp_error(interp,"cannot use -o more than once");
goto error;
}
dash_o_count++;
/* imply two "-input" */
if (dash_input_count < 2) {
dash_input_count = 2;
inp = input_default;
action_eof_ptr = &inp->action_eof;
}
break;
case EXP_SWITCH_SPAWN_ID:
/* substitute master */
objc--;objv++;