Commit | Line | Data |
a687059c |
1 | package DB; |
2 | |
f0fcb552 |
3 | # modified Perl debugger, to be run from Emacs in perldb-mode |
4 | # Ray Lischner (uunet!mntgfx!lisch) as of 5 Nov 1990 |
5 | # Johan Vromans -- upgrade to 4.0 pl 10 |
6 | |
83025b21 |
7 | $header = '$RCSfile: perldb.pl,v $$Revision: 4.0.1.3 $$Date: 92/06/08 13:43:57 $'; |
a687059c |
8 | # |
9 | # This file is automatically included if you do perl -d. |
10 | # It's probably not useful to include this yourself. |
11 | # |
12 | # Perl supplies the values for @line and %sub. It effectively inserts |
13 | # a do DB'DB(<linenum>); in front of every place that can |
14 | # have a breakpoint. It also inserts a do 'perldb.pl' before the first line. |
15 | # |
16 | # $Log: perldb.pl,v $ |
83025b21 |
17 | # Revision 4.0.1.3 92/06/08 13:43:57 lwall |
18 | # patch20: support for MSDOS folded into perldb.pl |
19 | # patch20: perldb couldn't debug file containing '-', such as STDIN designator |
20 | # |
f0fcb552 |
21 | # Revision 4.0.1.2 91/11/05 17:55:58 lwall |
22 | # patch11: perldb.pl modified to run within emacs in perldb-mode |
23 | # |
9ef589d8 |
24 | # Revision 4.0.1.1 91/06/07 11:17:44 lwall |
25 | # patch4: added $^P variable to control calling of perldb routines |
26 | # patch4: debugger sometimes listed wrong number of lines for a statement |
27 | # |
fe14fcc3 |
28 | # Revision 4.0 91/03/20 01:25:50 lwall |
29 | # 4.0 baseline. |
30 | # |
27e2fb84 |
31 | # Revision 3.0.1.6 91/01/11 18:08:58 lwall |
32 | # patch42: @_ couldn't be accessed from debugger |
33 | # |
34de22dd |
34 | # Revision 3.0.1.5 90/11/10 01:40:26 lwall |
35 | # patch38: the debugger wouldn't stop correctly or do action routines |
36 | # |
76854fea |
37 | # Revision 3.0.1.4 90/10/15 17:40:38 lwall |
38 | # patch29: added caller |
39 | # patch29: the debugger now understands packages and evals |
40 | # patch29: scripts now run at almost full speed under the debugger |
41 | # patch29: more variables are settable from debugger |
42 | # |
33b78306 |
43 | # Revision 3.0.1.3 90/08/09 04:00:58 lwall |
44 | # patch19: debugger now allows continuation lines |
45 | # patch19: debugger can now dump lists of variables |
46 | # patch19: debugger can now add aliases easily from prompt |
47 | # |
79a0689e |
48 | # Revision 3.0.1.2 90/03/12 16:39:39 lwall |
49 | # patch13: perl -d didn't format stack traces of *foo right |
50 | # patch13: perl -d wiped out scalar return values of subroutines |
51 | # |
03a14243 |
52 | # Revision 3.0.1.1 89/10/26 23:14:02 lwall |
53 | # patch1: RCS expanded an unintended $Header in lib/perldb.pl |
54 | # |
a687059c |
55 | # Revision 3.0 89/10/18 15:19:46 lwall |
56 | # 3.0 baseline |
57 | # |
58 | # Revision 2.0 88/06/05 00:09:45 root |
59 | # Baseline version 2.0. |
60 | # |
61 | # |
62 | |
83025b21 |
63 | if (-e "/dev/tty") { |
64 | $console = "/dev/tty"; |
65 | $rcfile=".perldb"; |
66 | } |
67 | else { |
68 | $console = "con"; |
69 | $rcfile="perldb.ini"; |
70 | } |
71 | |
72 | open(IN, "<$console") || open(IN, "<&STDIN"); # so we don't dingle stdin |
73 | open(OUT,">$console") || open(OUT, ">&STDOUT"); # so we don't dongle stdout |
a687059c |
74 | select(OUT); |
75 | $| = 1; # for DB'OUT |
76 | select(STDOUT); |
77 | $| = 1; # for real STDOUT |
76854fea |
78 | $sub = ''; |
a687059c |
79 | |
f0fcb552 |
80 | # Is Perl being run from Emacs? |
81 | $emacs = $main'ARGV[$[] eq '-emacs'; |
82 | shift(@main'ARGV) if $emacs; |
83 | |
03a14243 |
84 | $header =~ s/.Header: ([^,]+),v(\s+\S+\s+\S+).*$/$1$2/; |
f0fcb552 |
85 | print OUT "\nLoading DB routines from $header\n"; |
86 | print OUT ("Emacs support ", |
87 | $emacs ? "enabled" : "available", |
88 | ".\n"); |
89 | print OUT "\nEnter h for help.\n\n"; |
a687059c |
90 | |
91 | sub DB { |
76854fea |
92 | &save; |
93 | ($package, $filename, $line) = caller; |
94 | $usercontext = '($@, $!, $[, $,, $/, $\) = @saved;' . |
95 | "package $package;"; # this won't let them modify, alas |
9ef589d8 |
96 | local($^P) = 0; # don't debug our own evals |
76854fea |
97 | local(*dbline) = "_<$filename"; |
98 | $max = $#dbline; |
99 | if (($stop,$action) = split(/\0/,$dbline{$line})) { |
a687059c |
100 | if ($stop eq '1') { |
101 | $signal |= 1; |
102 | } |
103 | else { |
27e2fb84 |
104 | $evalarg = "\$DB'signal |= do {$stop;}"; &eval; |
76854fea |
105 | $dbline{$line} =~ s/;9($|\0)/$1/; |
a687059c |
106 | } |
107 | } |
108 | if ($single || $trace || $signal) { |
f0fcb552 |
109 | if ($emacs) { |
110 | print OUT "\032\032$filename:$line:0\n"; |
111 | } else { |
112 | print OUT "$package'" unless $sub =~ /'/; |
113 | print OUT "$sub($filename:$line):\t",$dbline[$line]; |
114 | for ($i = $line + 1; $i <= $max && $dbline[$i] == 0; ++$i) { |
115 | last if $dbline[$i] =~ /^\s*(}|#|\n)/; |
116 | print OUT "$sub($filename:$i):\t",$dbline[$i]; |
117 | } |
a687059c |
118 | } |
119 | } |
27e2fb84 |
120 | $evalarg = $action, &eval if $action; |
a687059c |
121 | if ($single || $signal) { |
27e2fb84 |
122 | $evalarg = $pre, &eval if $pre; |
a687059c |
123 | print OUT $#stack . " levels deep in subroutine calls!\n" |
124 | if $single & 4; |
125 | $start = $line; |
fe14fcc3 |
126 | CMD: |
76854fea |
127 | while ((print OUT " DB<", $#hist+1, "> "), $cmd=&gets) { |
fe14fcc3 |
128 | { |
129 | $single = 0; |
130 | $signal = 0; |
131 | $cmd eq '' && exit 0; |
132 | chop($cmd); |
133 | $cmd =~ s/\\$// && do { |
134 | print OUT " cont: "; |
135 | $cmd .= &gets; |
136 | redo CMD; |
137 | }; |
138 | $cmd =~ /^q$/ && exit 0; |
139 | $cmd =~ /^$/ && ($cmd = $laststep); |
140 | push(@hist,$cmd) if length($cmd) > 1; |
141 | ($i) = split(/\s+/,$cmd); |
142 | eval "\$cmd =~ $alias{$i}", print OUT $@ if $alias{$i}; |
143 | $cmd =~ /^h$/ && do { |
144 | print OUT " |
a687059c |
145 | T Stack trace. |
146 | s Single step. |
147 | n Next, steps over subroutine calls. |
76854fea |
148 | r Return from current subroutine. |
a687059c |
149 | c [line] Continue; optionally inserts a one-time-only breakpoint |
150 | at the specified line. |
151 | <CR> Repeat last n or s. |
152 | l min+incr List incr+1 lines starting at min. |
153 | l min-max List lines. |
154 | l line List line; |
155 | l List next window. |
156 | - List previous window. |
157 | w line List window around line. |
158 | l subname List subroutine. |
76854fea |
159 | f filename Switch to filename. |
a687059c |
160 | /pattern/ Search forwards for pattern; final / is optional. |
161 | ?pattern? Search backwards for pattern. |
162 | L List breakpoints and actions. |
163 | S List subroutine names. |
164 | t Toggle trace mode. |
165 | b [line] [condition] |
166 | Set breakpoint; line defaults to the current execution line; |
167 | condition breaks if it evaluates to true, defaults to \'1\'. |
168 | b subname [condition] |
169 | Set breakpoint at first line of subroutine. |
170 | d [line] Delete breakpoint. |
171 | D Delete all breakpoints. |
172 | a [line] command |
173 | Set an action to be done before the line is executed. |
174 | Sequence is: check for breakpoint, print line if necessary, |
175 | do action, prompt user if breakpoint or step, evaluate line. |
176 | A Delete all actions. |
76854fea |
177 | V [pkg [vars]] List some (default all) variables in package (default current). |
178 | X [vars] Same as \"V currentpackage [vars]\". |
a687059c |
179 | < command Define command before prompt. |
180 | > command Define command after prompt. |
181 | ! number Redo command (default previous command). |
182 | ! -number Redo number\'th to last command. |
183 | H -number Display last number commands (default all). |
184 | q or ^D Quit. |
76854fea |
185 | p expr Same as \"print DB'OUT expr\" in current package. |
33b78306 |
186 | = [alias value] Define a command alias, or list current aliases. |
76854fea |
187 | command Execute as a perl statement in current package. |
a687059c |
188 | |
189 | "; |
fe14fcc3 |
190 | next CMD; }; |
191 | $cmd =~ /^t$/ && do { |
192 | $trace = !$trace; |
193 | print OUT "Trace = ".($trace?"on":"off")."\n"; |
194 | next CMD; }; |
195 | $cmd =~ /^S$/ && do { |
196 | foreach $subname (sort(keys %sub)) { |
197 | print OUT $subname,"\n"; |
198 | } |
199 | next CMD; }; |
200 | $cmd =~ s/^X\b/V $package/; |
201 | $cmd =~ /^V$/ && do { |
202 | $cmd = 'V $package'; }; |
203 | $cmd =~ /^V\b\s*(\S+)\s*(.*)/ && do { |
204 | $packname = $1; |
205 | @vars = split(' ',$2); |
206 | do 'dumpvar.pl' unless defined &main'dumpvar; |
207 | if (defined &main'dumpvar) { |
208 | &main'dumpvar($packname,@vars); |
209 | } |
210 | else { |
211 | print DB'OUT "dumpvar.pl not available.\n"; |
76854fea |
212 | } |
fe14fcc3 |
213 | next CMD; }; |
214 | $cmd =~ /^f\b\s*(.*)/ && do { |
215 | $file = $1; |
216 | if (!$file) { |
217 | print OUT "The old f command is now the r command.\n"; |
218 | print OUT "The new f command switches filenames.\n"; |
219 | next CMD; |
a687059c |
220 | } |
fe14fcc3 |
221 | if (!defined $_main{'_<' . $file}) { |
222 | if (($try) = grep(m#^_<.*$file#, keys %_main)) { |
223 | $file = substr($try,2); |
224 | print "\n$file:\n"; |
76854fea |
225 | } |
226 | } |
fe14fcc3 |
227 | if (!defined $_main{'_<' . $file}) { |
228 | print OUT "There's no code here anything matching $file.\n"; |
229 | next CMD; |
230 | } |
231 | elsif ($file ne $filename) { |
232 | *dbline = "_<$file"; |
233 | $max = $#dbline; |
234 | $filename = $file; |
235 | $start = 1; |
236 | $cmd = "l"; |
237 | } }; |
238 | $cmd =~ /^l\b\s*(['A-Za-z_]['\w]*)/ && do { |
239 | $subname = $1; |
240 | $subname = "main'" . $subname unless $subname =~ /'/; |
241 | $subname = "main" . $subname if substr($subname,0,1) eq "'"; |
242 | ($file,$subrange) = split(/:/,$sub{$subname}); |
243 | if ($file ne $filename) { |
244 | *dbline = "_<$file"; |
245 | $max = $#dbline; |
246 | $filename = $file; |
247 | } |
248 | if ($subrange) { |
249 | if (eval($subrange) < -$window) { |
250 | $subrange =~ s/-.*/+/; |
251 | } |
252 | $cmd = "l $subrange"; |
253 | } else { |
254 | print OUT "Subroutine $1 not found.\n"; |
255 | next CMD; |
256 | } }; |
257 | $cmd =~ /^w\b\s*(\d*)$/ && do { |
258 | $incr = $window - 1; |
259 | $start = $1 if $1; |
260 | $start -= $preview; |
261 | $cmd = 'l ' . $start . '-' . ($start + $incr); }; |
262 | $cmd =~ /^-$/ && do { |
263 | $incr = $window - 1; |
264 | $cmd = 'l ' . ($start-$window*2) . '+'; }; |
265 | $cmd =~ /^l$/ && do { |
266 | $incr = $window - 1; |
267 | $cmd = 'l ' . $start . '-' . ($start + $incr); }; |
268 | $cmd =~ /^l\b\s*(\d*)\+(\d*)$/ && do { |
269 | $start = $1 if $1; |
270 | $incr = $2; |
271 | $incr = $window - 1 unless $incr; |
272 | $cmd = 'l ' . $start . '-' . ($start + $incr); }; |
273 | $cmd =~ /^l\b\s*(([\d\$\.]+)([-,]([\d\$\.]+))?)?/ && do { |
274 | $end = (!$2) ? $max : ($4 ? $4 : $2); |
275 | $end = $max if $end > $max; |
276 | $i = $2; |
277 | $i = $line if $i eq '.'; |
278 | $i = 1 if $i < 1; |
f0fcb552 |
279 | if ($emacs) { |
280 | print OUT "\032\032$filename:$i:0\n"; |
281 | $i = $end; |
282 | } else { |
283 | for (; $i <= $end; $i++) { |
284 | print OUT "$i:\t", $dbline[$i]; |
285 | last if $signal; |
286 | } |
a687059c |
287 | } |
fe14fcc3 |
288 | $start = $i; # remember in case they want more |
289 | $start = $max if $start > $max; |
290 | next CMD; }; |
291 | $cmd =~ /^D$/ && do { |
292 | print OUT "Deleting all breakpoints...\n"; |
293 | for ($i = 1; $i <= $max ; $i++) { |
294 | if (defined $dbline{$i}) { |
295 | $dbline{$i} =~ s/^[^\0]+//; |
296 | if ($dbline{$i} =~ s/^\0?$//) { |
297 | delete $dbline{$i}; |
298 | } |
299 | } |
300 | } |
301 | next CMD; }; |
302 | $cmd =~ /^L$/ && do { |
303 | for ($i = 1; $i <= $max; $i++) { |
304 | if (defined $dbline{$i}) { |
305 | print OUT "$i:\t", $dbline[$i]; |
306 | ($stop,$action) = split(/\0/, $dbline{$i}); |
307 | print OUT " break if (", $stop, ")\n" |
308 | if $stop; |
309 | print OUT " action: ", $action, "\n" |
310 | if $action; |
311 | last if $signal; |
312 | } |
313 | } |
314 | next CMD; }; |
315 | $cmd =~ /^b\b\s*(['A-Za-z_]['\w]*)\s*(.*)/ && do { |
316 | $subname = $1; |
317 | $cond = $2 || '1'; |
318 | $subname = "$package'" . $subname unless $subname =~ /'/; |
319 | $subname = "main" . $subname if substr($subname,0,1) eq "'"; |
83025b21 |
320 | ($filename,$i) = split(/:/, $sub{$subname}); |
321 | $i += 0; |
fe14fcc3 |
322 | if ($i) { |
323 | *dbline = "_<$filename"; |
324 | ++$i while $dbline[$i] == 0 && $i < $#dbline; |
325 | $dbline{$i} =~ s/^[^\0]*/$cond/; |
326 | } else { |
327 | print OUT "Subroutine $subname not found.\n"; |
76854fea |
328 | } |
fe14fcc3 |
329 | next CMD; }; |
330 | $cmd =~ /^b\b\s*(\d*)\s*(.*)/ && do { |
331 | $i = ($1?$1:$line); |
332 | $cond = $2 || '1'; |
76854fea |
333 | if ($dbline[$i] == 0) { |
fe14fcc3 |
334 | print OUT "Line $i not breakable.\n"; |
335 | } else { |
336 | $dbline{$i} =~ s/^[^\0]*/$cond/; |
a687059c |
337 | } |
fe14fcc3 |
338 | next CMD; }; |
339 | $cmd =~ /^d\b\s*(\d+)?/ && do { |
340 | $i = ($1?$1:$line); |
341 | $dbline{$i} =~ s/^[^\0]*//; |
342 | delete $dbline{$i} if $dbline{$i} eq ''; |
343 | next CMD; }; |
344 | $cmd =~ /^A$/ && do { |
345 | for ($i = 1; $i <= $max ; $i++) { |
346 | if (defined $dbline{$i}) { |
347 | $dbline{$i} =~ s/\0[^\0]*//; |
348 | delete $dbline{$i} if $dbline{$i} eq ''; |
76854fea |
349 | } |
fe14fcc3 |
350 | } |
351 | next CMD; }; |
352 | $cmd =~ /^<\s*(.*)/ && do { |
353 | $pre = do action($1); |
354 | next CMD; }; |
355 | $cmd =~ /^>\s*(.*)/ && do { |
356 | $post = do action($1); |
357 | next CMD; }; |
358 | $cmd =~ /^a\b\s*(\d+)(\s+(.*))?/ && do { |
359 | $i = $1; |
360 | if ($dbline[$i] == 0) { |
361 | print OUT "Line $i may not have an action.\n"; |
362 | } else { |
363 | $dbline{$i} =~ s/\0[^\0]*//; |
364 | $dbline{$i} .= "\0" . do action($3); |
365 | } |
366 | next CMD; }; |
367 | $cmd =~ /^n$/ && do { |
368 | $single = 2; |
369 | $laststep = $cmd; |
370 | last CMD; }; |
371 | $cmd =~ /^s$/ && do { |
372 | $single = 1; |
373 | $laststep = $cmd; |
374 | last CMD; }; |
375 | $cmd =~ /^c\b\s*(\d*)\s*$/ && do { |
376 | $i = $1; |
377 | if ($i) { |
378 | if ($dbline[$i] == 0) { |
379 | print OUT "Line $i not breakable.\n"; |
380 | next CMD; |
76854fea |
381 | } |
fe14fcc3 |
382 | $dbline{$i} =~ s/(\0|$)/;9$1/; # add one-time-only b.p. |
76854fea |
383 | } |
fe14fcc3 |
384 | for ($i=0; $i <= $#stack; ) { |
385 | $stack[$i++] &= ~1; |
a687059c |
386 | } |
fe14fcc3 |
387 | last CMD; }; |
388 | $cmd =~ /^r$/ && do { |
389 | $stack[$#stack] |= 2; |
390 | last CMD; }; |
391 | $cmd =~ /^T$/ && do { |
392 | local($p,$f,$l,$s,$h,$a,@a,@sub); |
393 | for ($i = 1; ($p,$f,$l,$s,$h,$w) = caller($i); $i++) { |
394 | @a = @args; |
395 | for (@a) { |
396 | if (/^StB\000/ && length($_) == length($_main{'_main'})) { |
397 | $_ = sprintf("%s",$_); |
398 | } |
399 | else { |
400 | s/'/\\'/g; |
401 | s/([^\0]*)/'$1'/ unless /^-?[\d.]+$/; |
402 | s/([\200-\377])/sprintf("M-%c",ord($1)&0177)/eg; |
403 | s/([\0-\37\177])/sprintf("^%c",ord($1)^64)/eg; |
404 | } |
405 | } |
406 | $w = $w ? '@ = ' : '$ = '; |
407 | $a = $h ? '(' . join(', ', @a) . ')' : ''; |
408 | push(@sub, "$w&$s$a from file $f line $l\n"); |
409 | last if $signal; |
a687059c |
410 | } |
fe14fcc3 |
411 | for ($i=0; $i <= $#sub; $i++) { |
412 | last if $signal; |
413 | print OUT $sub[$i]; |
a687059c |
414 | } |
fe14fcc3 |
415 | next CMD; }; |
416 | $cmd =~ /^\/(.*)$/ && do { |
417 | $inpat = $1; |
418 | $inpat =~ s:([^\\])/$:$1:; |
419 | if ($inpat ne "") { |
420 | eval '$inpat =~ m'."\n$inpat\n"; |
421 | if ($@ ne "") { |
422 | print OUT "$@"; |
423 | next CMD; |
424 | } |
425 | $pat = $inpat; |
a687059c |
426 | } |
fe14fcc3 |
427 | $end = $start; |
428 | eval ' |
429 | for (;;) { |
430 | ++$start; |
431 | $start = 1 if ($start > $max); |
432 | last if ($start == $end); |
433 | if ($dbline[$start] =~ m'."\n$pat\n".'i) { |
f0fcb552 |
434 | if ($emacs) { |
435 | print OUT "\032\032$filename:$start:0\n"; |
436 | } else { |
437 | print OUT "$start:\t", $dbline[$start], "\n"; |
438 | } |
fe14fcc3 |
439 | last; |
440 | } |
441 | } '; |
442 | print OUT "/$pat/: not found\n" if ($start == $end); |
443 | next CMD; }; |
444 | $cmd =~ /^\?(.*)$/ && do { |
445 | $inpat = $1; |
446 | $inpat =~ s:([^\\])\?$:$1:; |
447 | if ($inpat ne "") { |
448 | eval '$inpat =~ m'."\n$inpat\n"; |
449 | if ($@ ne "") { |
450 | print OUT "$@"; |
451 | next CMD; |
452 | } |
453 | $pat = $inpat; |
454 | } |
455 | $end = $start; |
456 | eval ' |
457 | for (;;) { |
458 | --$start; |
459 | $start = $max if ($start <= 0); |
460 | last if ($start == $end); |
461 | if ($dbline[$start] =~ m'."\n$pat\n".'i) { |
f0fcb552 |
462 | if ($emacs) { |
463 | print OUT "\032\032$filename:$start:0\n"; |
464 | } else { |
465 | print OUT "$start:\t", $dbline[$start], "\n"; |
466 | } |
fe14fcc3 |
467 | last; |
468 | } |
469 | } '; |
470 | print OUT "?$pat?: not found\n" if ($start == $end); |
471 | next CMD; }; |
472 | $cmd =~ /^!+\s*(-)?(\d+)?$/ && do { |
473 | pop(@hist) if length($cmd) > 1; |
474 | $i = ($1?($#hist-($2?$2:1)):($2?$2:$#hist)); |
475 | $cmd = $hist[$i] . "\n"; |
476 | print OUT $cmd; |
477 | redo CMD; }; |
478 | $cmd =~ /^!(.+)$/ && do { |
479 | $pat = "^$1"; |
480 | pop(@hist) if length($cmd) > 1; |
481 | for ($i = $#hist; $i; --$i) { |
482 | last if $hist[$i] =~ $pat; |
483 | } |
484 | if (!$i) { |
485 | print OUT "No such command!\n\n"; |
486 | next CMD; |
487 | } |
488 | $cmd = $hist[$i] . "\n"; |
489 | print OUT $cmd; |
490 | redo CMD; }; |
491 | $cmd =~ /^H\b\s*(-(\d+))?/ && do { |
492 | $end = $2?($#hist-$2):0; |
493 | $hist = 0 if $hist < 0; |
494 | for ($i=$#hist; $i>$end; $i--) { |
495 | print OUT "$i: ",$hist[$i],"\n" |
496 | unless $hist[$i] =~ /^.?$/; |
497 | }; |
498 | next CMD; }; |
499 | $cmd =~ s/^p( .*)?$/print DB'OUT$1/; |
500 | $cmd =~ /^=/ && do { |
501 | if (local($k,$v) = ($cmd =~ /^=\s*(\S+)\s+(.*)/)) { |
502 | $alias{$k}="s~$k~$v~"; |
503 | print OUT "$k = $v\n"; |
504 | } elsif ($cmd =~ /^=\s*$/) { |
505 | foreach $k (sort keys(%alias)) { |
506 | if (($v = $alias{$k}) =~ s~^s\~$k\~(.*)\~$~$1~) { |
507 | print OUT "$k = $v\n"; |
508 | } else { |
509 | print OUT "$k\t$alias{$k}\n"; |
510 | }; |
33b78306 |
511 | }; |
512 | }; |
fe14fcc3 |
513 | next CMD; }; |
514 | } |
27e2fb84 |
515 | $evalarg = $cmd; &eval; |
76854fea |
516 | print OUT "\n"; |
a687059c |
517 | } |
518 | if ($post) { |
27e2fb84 |
519 | $evalarg = $post; &eval; |
a687059c |
520 | } |
521 | } |
76854fea |
522 | ($@, $!, $[, $,, $/, $\) = @saved; |
523 | } |
524 | |
525 | sub save { |
526 | @saved = ($@, $!, $[, $,, $/, $\); |
527 | $[ = 0; $, = ""; $/ = "\n"; $\ = ""; |
528 | } |
529 | |
27e2fb84 |
530 | # The following takes its argument via $evalarg to preserve current @_ |
531 | |
76854fea |
532 | sub eval { |
27e2fb84 |
533 | eval "$usercontext $evalarg; &DB'save"; |
76854fea |
534 | print OUT $@; |
a687059c |
535 | } |
536 | |
537 | sub action { |
538 | local($action) = @_; |
539 | while ($action =~ s/\\$//) { |
540 | print OUT "+ "; |
76854fea |
541 | $action .= &gets; |
a687059c |
542 | } |
543 | $action; |
544 | } |
545 | |
76854fea |
546 | sub gets { |
547 | local($.); |
548 | <IN>; |
549 | } |
550 | |
a687059c |
551 | sub catch { |
552 | $signal = 1; |
553 | } |
554 | |
555 | sub sub { |
556 | push(@stack, $single); |
557 | $single &= 1; |
558 | $single |= 4 if $#stack == $deep; |
a687059c |
559 | if (wantarray) { |
560 | @i = &$sub; |
79a0689e |
561 | $single |= pop(@stack); |
562 | @i; |
a687059c |
563 | } |
564 | else { |
565 | $i = &$sub; |
79a0689e |
566 | $single |= pop(@stack); |
567 | $i; |
a687059c |
568 | } |
a687059c |
569 | } |
570 | |
571 | $single = 1; # so it stops on first executable statement |
a687059c |
572 | @hist = ('?'); |
573 | $SIG{'INT'} = "DB'catch"; |
574 | $deep = 100; # warning if stack gets this deep |
575 | $window = 10; |
576 | $preview = 3; |
577 | |
578 | @stack = (0); |
76854fea |
579 | @ARGS = @ARGV; |
a687059c |
580 | for (@args) { |
581 | s/'/\\'/g; |
582 | s/(.*)/'$1'/ unless /^-?[\d.]+$/; |
583 | } |
a687059c |
584 | |
83025b21 |
585 | if (-f $rcfile) { |
586 | do "./$rcfile"; |
a687059c |
587 | } |
83025b21 |
588 | elsif (-f "$ENV{'LOGDIR'}/$rcfile") { |
589 | do "$ENV{'LOGDIR'}/$rcfile"; |
a687059c |
590 | } |
83025b21 |
591 | elsif (-f "$ENV{'HOME'}/$rcfile") { |
592 | do "$ENV{'HOME'}/$rcfile"; |
a687059c |
593 | } |
594 | |
595 | 1; |