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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 | |
a0d0e21e |
7 | $header = '$RCSfile: perl5db.pl,v $$Revision: 4.1 $$Date: 92/08/07 18:24:07 $'; |
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 |
a0d0e21e |
13 | # a &DB'DB(<linenum>); in front of every place that can |
a687059c |
14 | # have a breakpoint. It also inserts a do 'perldb.pl' before the first line. |
15 | # |
16 | # $Log: perldb.pl,v $ |
a0d0e21e |
17 | |
18 | local($^W) = 0; |
a687059c |
19 | |
83025b21 |
20 | if (-e "/dev/tty") { |
21 | $console = "/dev/tty"; |
22 | $rcfile=".perldb"; |
23 | } |
a0d0e21e |
24 | elsif (-e "con") { |
83025b21 |
25 | $console = "con"; |
26 | $rcfile="perldb.ini"; |
27 | } |
a0d0e21e |
28 | else { |
29 | $console = "sys\$command"; |
30 | $rcfile="perldb.ini"; |
31 | } |
83025b21 |
32 | |
33 | open(IN, "<$console") || open(IN, "<&STDIN"); # so we don't dingle stdin |
a0d0e21e |
34 | open(OUT,">$console") || open(OUT, ">&STDERR") |
8990e307 |
35 | || open(OUT, ">&STDOUT"); # so we don't dongle stdout |
a687059c |
36 | select(OUT); |
ed6116ce |
37 | $| = 1; # for DB::OUT |
a687059c |
38 | select(STDOUT); |
39 | $| = 1; # for real STDOUT |
76854fea |
40 | $sub = ''; |
a687059c |
41 | |
f0fcb552 |
42 | # Is Perl being run from Emacs? |
a0d0e21e |
43 | $emacs = $main::ARGV[0] eq '-emacs'; |
ed6116ce |
44 | shift(@main::ARGV) if $emacs; |
f0fcb552 |
45 | |
03a14243 |
46 | $header =~ s/.Header: ([^,]+),v(\s+\S+\s+\S+).*$/$1$2/; |
f0fcb552 |
47 | print OUT "\nLoading DB routines from $header\n"; |
48 | print OUT ("Emacs support ", |
49 | $emacs ? "enabled" : "available", |
50 | ".\n"); |
51 | print OUT "\nEnter h for help.\n\n"; |
a687059c |
52 | |
53 | sub DB { |
76854fea |
54 | &save; |
55 | ($package, $filename, $line) = caller; |
a0d0e21e |
56 | $usercontext = '($@, $!, $,, $/, $\, $^W) = @saved;' . |
76854fea |
57 | "package $package;"; # this won't let them modify, alas |
ed6116ce |
58 | local(*dbline) = "::_<$filename"; |
76854fea |
59 | $max = $#dbline; |
60 | if (($stop,$action) = split(/\0/,$dbline{$line})) { |
a687059c |
61 | if ($stop eq '1') { |
62 | $signal |= 1; |
63 | } |
64 | else { |
ed6116ce |
65 | $evalarg = "\$DB::signal |= do {$stop;}"; &eval; |
76854fea |
66 | $dbline{$line} =~ s/;9($|\0)/$1/; |
a687059c |
67 | } |
68 | } |
69 | if ($single || $trace || $signal) { |
f0fcb552 |
70 | if ($emacs) { |
71 | print OUT "\032\032$filename:$line:0\n"; |
72 | } else { |
a0d0e21e |
73 | $prefix = $sub =~ /'|::/ ? "" : "${package}::"; |
74 | $prefix .= "$sub($filename:"; |
75 | if (length($prefix) > 30) { |
76 | print OUT "$prefix$line):\n$line:\t",$dbline[$line]; |
77 | $prefix = ""; |
78 | $infix = ":\t"; |
79 | } |
80 | else { |
81 | $infix = "):\t"; |
82 | print OUT "$prefix$line$infix",$dbline[$line]; |
83 | } |
f0fcb552 |
84 | for ($i = $line + 1; $i <= $max && $dbline[$i] == 0; ++$i) { |
85 | last if $dbline[$i] =~ /^\s*(}|#|\n)/; |
a0d0e21e |
86 | print OUT "$prefix$i$infix",$dbline[$i]; |
f0fcb552 |
87 | } |
a687059c |
88 | } |
89 | } |
27e2fb84 |
90 | $evalarg = $action, &eval if $action; |
a687059c |
91 | if ($single || $signal) { |
27e2fb84 |
92 | $evalarg = $pre, &eval if $pre; |
a687059c |
93 | print OUT $#stack . " levels deep in subroutine calls!\n" |
94 | if $single & 4; |
95 | $start = $line; |
fe14fcc3 |
96 | CMD: |
76854fea |
97 | while ((print OUT " DB<", $#hist+1, "> "), $cmd=&gets) { |
fe14fcc3 |
98 | { |
99 | $single = 0; |
100 | $signal = 0; |
101 | $cmd eq '' && exit 0; |
102 | chop($cmd); |
103 | $cmd =~ s/\\$// && do { |
104 | print OUT " cont: "; |
105 | $cmd .= &gets; |
106 | redo CMD; |
107 | }; |
108 | $cmd =~ /^q$/ && exit 0; |
109 | $cmd =~ /^$/ && ($cmd = $laststep); |
110 | push(@hist,$cmd) if length($cmd) > 1; |
111 | ($i) = split(/\s+/,$cmd); |
112 | eval "\$cmd =~ $alias{$i}", print OUT $@ if $alias{$i}; |
113 | $cmd =~ /^h$/ && do { |
114 | print OUT " |
a687059c |
115 | T Stack trace. |
116 | s Single step. |
117 | n Next, steps over subroutine calls. |
76854fea |
118 | r Return from current subroutine. |
a687059c |
119 | c [line] Continue; optionally inserts a one-time-only breakpoint |
120 | at the specified line. |
121 | <CR> Repeat last n or s. |
122 | l min+incr List incr+1 lines starting at min. |
123 | l min-max List lines. |
124 | l line List line; |
125 | l List next window. |
126 | - List previous window. |
127 | w line List window around line. |
128 | l subname List subroutine. |
76854fea |
129 | f filename Switch to filename. |
a687059c |
130 | /pattern/ Search forwards for pattern; final / is optional. |
131 | ?pattern? Search backwards for pattern. |
132 | L List breakpoints and actions. |
133 | S List subroutine names. |
134 | t Toggle trace mode. |
135 | b [line] [condition] |
136 | Set breakpoint; line defaults to the current execution line; |
137 | condition breaks if it evaluates to true, defaults to \'1\'. |
138 | b subname [condition] |
139 | Set breakpoint at first line of subroutine. |
140 | d [line] Delete breakpoint. |
141 | D Delete all breakpoints. |
142 | a [line] command |
143 | Set an action to be done before the line is executed. |
144 | Sequence is: check for breakpoint, print line if necessary, |
145 | do action, prompt user if breakpoint or step, evaluate line. |
146 | A Delete all actions. |
76854fea |
147 | V [pkg [vars]] List some (default all) variables in package (default current). |
148 | X [vars] Same as \"V currentpackage [vars]\". |
a687059c |
149 | < command Define command before prompt. |
150 | > command Define command after prompt. |
151 | ! number Redo command (default previous command). |
152 | ! -number Redo number\'th to last command. |
153 | H -number Display last number commands (default all). |
154 | q or ^D Quit. |
ed6116ce |
155 | p expr Same as \"print DB::OUT expr\" in current package. |
33b78306 |
156 | = [alias value] Define a command alias, or list current aliases. |
76854fea |
157 | command Execute as a perl statement in current package. |
a687059c |
158 | |
159 | "; |
fe14fcc3 |
160 | next CMD; }; |
161 | $cmd =~ /^t$/ && do { |
162 | $trace = !$trace; |
163 | print OUT "Trace = ".($trace?"on":"off")."\n"; |
164 | next CMD; }; |
165 | $cmd =~ /^S$/ && do { |
166 | foreach $subname (sort(keys %sub)) { |
167 | print OUT $subname,"\n"; |
168 | } |
169 | next CMD; }; |
170 | $cmd =~ s/^X\b/V $package/; |
171 | $cmd =~ /^V$/ && do { |
79072805 |
172 | $cmd = "V $package"; }; |
fe14fcc3 |
173 | $cmd =~ /^V\b\s*(\S+)\s*(.*)/ && do { |
79072805 |
174 | local ($savout) = select(OUT); |
fe14fcc3 |
175 | $packname = $1; |
176 | @vars = split(' ',$2); |
ed6116ce |
177 | do 'dumpvar.pl' unless defined &main::dumpvar; |
178 | if (defined &main::dumpvar) { |
179 | &main::dumpvar($packname,@vars); |
fe14fcc3 |
180 | } |
181 | else { |
ed6116ce |
182 | print DB::OUT "dumpvar.pl not available.\n"; |
76854fea |
183 | } |
79072805 |
184 | select ($savout); |
fe14fcc3 |
185 | next CMD; }; |
186 | $cmd =~ /^f\b\s*(.*)/ && do { |
187 | $file = $1; |
188 | if (!$file) { |
189 | print OUT "The old f command is now the r command.\n"; |
190 | print OUT "The new f command switches filenames.\n"; |
191 | next CMD; |
a687059c |
192 | } |
a0d0e21e |
193 | if (!defined $main::{'_<' . $file}) { |
194 | if (($try) = grep(m#^_<.*$file#, keys %main::)) { |
fe14fcc3 |
195 | $file = substr($try,2); |
196 | print "\n$file:\n"; |
76854fea |
197 | } |
198 | } |
a0d0e21e |
199 | if (!defined $main::{'_<' . $file}) { |
fe14fcc3 |
200 | print OUT "There's no code here anything matching $file.\n"; |
201 | next CMD; |
202 | } |
203 | elsif ($file ne $filename) { |
ed6116ce |
204 | *dbline = "::_<$file"; |
fe14fcc3 |
205 | $max = $#dbline; |
206 | $filename = $file; |
207 | $start = 1; |
208 | $cmd = "l"; |
209 | } }; |
ed6116ce |
210 | $cmd =~ /^l\b\s*([':A-Za-z_][':\w]*)/ && do { |
fe14fcc3 |
211 | $subname = $1; |
ed6116ce |
212 | $subname = "main::" . $subname unless $subname =~ /'|::/; |
213 | $subname = "main" . $subname if substr($subname,0,1)eq "'"; |
214 | $subname = "main" . $subname if substr($subname,0,2)eq "::"; |
fe14fcc3 |
215 | ($file,$subrange) = split(/:/,$sub{$subname}); |
216 | if ($file ne $filename) { |
ed6116ce |
217 | *dbline = "::_<$file"; |
fe14fcc3 |
218 | $max = $#dbline; |
219 | $filename = $file; |
220 | } |
221 | if ($subrange) { |
222 | if (eval($subrange) < -$window) { |
223 | $subrange =~ s/-.*/+/; |
224 | } |
225 | $cmd = "l $subrange"; |
226 | } else { |
227 | print OUT "Subroutine $1 not found.\n"; |
228 | next CMD; |
229 | } }; |
230 | $cmd =~ /^w\b\s*(\d*)$/ && do { |
231 | $incr = $window - 1; |
232 | $start = $1 if $1; |
233 | $start -= $preview; |
234 | $cmd = 'l ' . $start . '-' . ($start + $incr); }; |
235 | $cmd =~ /^-$/ && do { |
236 | $incr = $window - 1; |
237 | $cmd = 'l ' . ($start-$window*2) . '+'; }; |
238 | $cmd =~ /^l$/ && do { |
239 | $incr = $window - 1; |
240 | $cmd = 'l ' . $start . '-' . ($start + $incr); }; |
241 | $cmd =~ /^l\b\s*(\d*)\+(\d*)$/ && do { |
242 | $start = $1 if $1; |
243 | $incr = $2; |
244 | $incr = $window - 1 unless $incr; |
245 | $cmd = 'l ' . $start . '-' . ($start + $incr); }; |
246 | $cmd =~ /^l\b\s*(([\d\$\.]+)([-,]([\d\$\.]+))?)?/ && do { |
247 | $end = (!$2) ? $max : ($4 ? $4 : $2); |
248 | $end = $max if $end > $max; |
249 | $i = $2; |
250 | $i = $line if $i eq '.'; |
251 | $i = 1 if $i < 1; |
f0fcb552 |
252 | if ($emacs) { |
253 | print OUT "\032\032$filename:$i:0\n"; |
254 | $i = $end; |
255 | } else { |
256 | for (; $i <= $end; $i++) { |
257 | print OUT "$i:\t", $dbline[$i]; |
258 | last if $signal; |
259 | } |
a687059c |
260 | } |
fe14fcc3 |
261 | $start = $i; # remember in case they want more |
262 | $start = $max if $start > $max; |
263 | next CMD; }; |
264 | $cmd =~ /^D$/ && do { |
265 | print OUT "Deleting all breakpoints...\n"; |
266 | for ($i = 1; $i <= $max ; $i++) { |
267 | if (defined $dbline{$i}) { |
268 | $dbline{$i} =~ s/^[^\0]+//; |
269 | if ($dbline{$i} =~ s/^\0?$//) { |
270 | delete $dbline{$i}; |
271 | } |
272 | } |
273 | } |
274 | next CMD; }; |
275 | $cmd =~ /^L$/ && do { |
276 | for ($i = 1; $i <= $max; $i++) { |
277 | if (defined $dbline{$i}) { |
278 | print OUT "$i:\t", $dbline[$i]; |
279 | ($stop,$action) = split(/\0/, $dbline{$i}); |
280 | print OUT " break if (", $stop, ")\n" |
281 | if $stop; |
282 | print OUT " action: ", $action, "\n" |
283 | if $action; |
284 | last if $signal; |
285 | } |
286 | } |
287 | next CMD; }; |
ed6116ce |
288 | $cmd =~ /^b\b\s*([':A-Za-z_][':\w]*)\s*(.*)/ && do { |
fe14fcc3 |
289 | $subname = $1; |
290 | $cond = $2 || '1'; |
a0d0e21e |
291 | $subname = "${package}::" . $subname |
292 | unless $subname =~ /'|::/; |
fe14fcc3 |
293 | $subname = "main" . $subname if substr($subname,0,1) eq "'"; |
ed6116ce |
294 | $subname = "main" . $subname if substr($subname,0,2) eq "::"; |
83025b21 |
295 | ($filename,$i) = split(/:/, $sub{$subname}); |
296 | $i += 0; |
fe14fcc3 |
297 | if ($i) { |
ed6116ce |
298 | *dbline = "::_<$filename"; |
fe14fcc3 |
299 | ++$i while $dbline[$i] == 0 && $i < $#dbline; |
300 | $dbline{$i} =~ s/^[^\0]*/$cond/; |
301 | } else { |
302 | print OUT "Subroutine $subname not found.\n"; |
76854fea |
303 | } |
fe14fcc3 |
304 | next CMD; }; |
305 | $cmd =~ /^b\b\s*(\d*)\s*(.*)/ && do { |
306 | $i = ($1?$1:$line); |
307 | $cond = $2 || '1'; |
76854fea |
308 | if ($dbline[$i] == 0) { |
fe14fcc3 |
309 | print OUT "Line $i not breakable.\n"; |
310 | } else { |
311 | $dbline{$i} =~ s/^[^\0]*/$cond/; |
a687059c |
312 | } |
fe14fcc3 |
313 | next CMD; }; |
314 | $cmd =~ /^d\b\s*(\d+)?/ && do { |
315 | $i = ($1?$1:$line); |
316 | $dbline{$i} =~ s/^[^\0]*//; |
317 | delete $dbline{$i} if $dbline{$i} eq ''; |
318 | next CMD; }; |
319 | $cmd =~ /^A$/ && do { |
320 | for ($i = 1; $i <= $max ; $i++) { |
321 | if (defined $dbline{$i}) { |
322 | $dbline{$i} =~ s/\0[^\0]*//; |
323 | delete $dbline{$i} if $dbline{$i} eq ''; |
76854fea |
324 | } |
fe14fcc3 |
325 | } |
326 | next CMD; }; |
327 | $cmd =~ /^<\s*(.*)/ && do { |
a0d0e21e |
328 | $pre = action($1); |
fe14fcc3 |
329 | next CMD; }; |
330 | $cmd =~ /^>\s*(.*)/ && do { |
a0d0e21e |
331 | $post = action($1); |
fe14fcc3 |
332 | next CMD; }; |
333 | $cmd =~ /^a\b\s*(\d+)(\s+(.*))?/ && do { |
334 | $i = $1; |
335 | if ($dbline[$i] == 0) { |
336 | print OUT "Line $i may not have an action.\n"; |
337 | } else { |
338 | $dbline{$i} =~ s/\0[^\0]*//; |
a0d0e21e |
339 | $dbline{$i} .= "\0" . action($3); |
fe14fcc3 |
340 | } |
341 | next CMD; }; |
342 | $cmd =~ /^n$/ && do { |
343 | $single = 2; |
344 | $laststep = $cmd; |
345 | last CMD; }; |
346 | $cmd =~ /^s$/ && do { |
347 | $single = 1; |
348 | $laststep = $cmd; |
349 | last CMD; }; |
350 | $cmd =~ /^c\b\s*(\d*)\s*$/ && do { |
351 | $i = $1; |
352 | if ($i) { |
353 | if ($dbline[$i] == 0) { |
354 | print OUT "Line $i not breakable.\n"; |
355 | next CMD; |
76854fea |
356 | } |
fe14fcc3 |
357 | $dbline{$i} =~ s/(\0|$)/;9$1/; # add one-time-only b.p. |
76854fea |
358 | } |
fe14fcc3 |
359 | for ($i=0; $i <= $#stack; ) { |
360 | $stack[$i++] &= ~1; |
a687059c |
361 | } |
fe14fcc3 |
362 | last CMD; }; |
363 | $cmd =~ /^r$/ && do { |
364 | $stack[$#stack] |= 2; |
365 | last CMD; }; |
366 | $cmd =~ /^T$/ && do { |
367 | local($p,$f,$l,$s,$h,$a,@a,@sub); |
368 | for ($i = 1; ($p,$f,$l,$s,$h,$w) = caller($i); $i++) { |
a0d0e21e |
369 | @a = (); |
370 | for $arg (@args) { |
371 | $_ = "$arg"; |
ed6116ce |
372 | s/'/\\'/g; |
a0d0e21e |
373 | s/([^\0]*)/'$1'/ |
374 | unless /^(?: -?[\d.]+ | \*[\w:]* )$/x; |
ed6116ce |
375 | s/([\200-\377])/sprintf("M-%c",ord($1)&0177)/eg; |
376 | s/([\0-\37\177])/sprintf("^%c",ord($1)^64)/eg; |
a0d0e21e |
377 | push(@a, $_); |
fe14fcc3 |
378 | } |
379 | $w = $w ? '@ = ' : '$ = '; |
380 | $a = $h ? '(' . join(', ', @a) . ')' : ''; |
a0d0e21e |
381 | push(@sub, "$w$s$a from file $f line $l\n"); |
fe14fcc3 |
382 | last if $signal; |
a687059c |
383 | } |
fe14fcc3 |
384 | for ($i=0; $i <= $#sub; $i++) { |
385 | last if $signal; |
386 | print OUT $sub[$i]; |
a687059c |
387 | } |
fe14fcc3 |
388 | next CMD; }; |
389 | $cmd =~ /^\/(.*)$/ && do { |
390 | $inpat = $1; |
391 | $inpat =~ s:([^\\])/$:$1:; |
392 | if ($inpat ne "") { |
a0d0e21e |
393 | eval '$inpat =~ m'."\a$inpat\a"; |
fe14fcc3 |
394 | if ($@ ne "") { |
395 | print OUT "$@"; |
396 | next CMD; |
397 | } |
398 | $pat = $inpat; |
a687059c |
399 | } |
fe14fcc3 |
400 | $end = $start; |
401 | eval ' |
402 | for (;;) { |
403 | ++$start; |
404 | $start = 1 if ($start > $max); |
405 | last if ($start == $end); |
a0d0e21e |
406 | if ($dbline[$start] =~ m'."\a$pat\a".'i) { |
f0fcb552 |
407 | if ($emacs) { |
408 | print OUT "\032\032$filename:$start:0\n"; |
409 | } else { |
410 | print OUT "$start:\t", $dbline[$start], "\n"; |
411 | } |
fe14fcc3 |
412 | last; |
413 | } |
414 | } '; |
415 | print OUT "/$pat/: not found\n" if ($start == $end); |
416 | next CMD; }; |
417 | $cmd =~ /^\?(.*)$/ && do { |
418 | $inpat = $1; |
419 | $inpat =~ s:([^\\])\?$:$1:; |
420 | if ($inpat ne "") { |
a0d0e21e |
421 | eval '$inpat =~ m'."\a$inpat\a"; |
fe14fcc3 |
422 | if ($@ ne "") { |
423 | print OUT "$@"; |
424 | next CMD; |
425 | } |
426 | $pat = $inpat; |
427 | } |
428 | $end = $start; |
429 | eval ' |
430 | for (;;) { |
431 | --$start; |
432 | $start = $max if ($start <= 0); |
433 | last if ($start == $end); |
a0d0e21e |
434 | if ($dbline[$start] =~ m'."\a$pat\a".'i) { |
f0fcb552 |
435 | if ($emacs) { |
436 | print OUT "\032\032$filename:$start:0\n"; |
437 | } else { |
438 | print OUT "$start:\t", $dbline[$start], "\n"; |
439 | } |
fe14fcc3 |
440 | last; |
441 | } |
442 | } '; |
443 | print OUT "?$pat?: not found\n" if ($start == $end); |
444 | next CMD; }; |
445 | $cmd =~ /^!+\s*(-)?(\d+)?$/ && do { |
446 | pop(@hist) if length($cmd) > 1; |
447 | $i = ($1?($#hist-($2?$2:1)):($2?$2:$#hist)); |
448 | $cmd = $hist[$i] . "\n"; |
449 | print OUT $cmd; |
450 | redo CMD; }; |
451 | $cmd =~ /^!(.+)$/ && do { |
452 | $pat = "^$1"; |
453 | pop(@hist) if length($cmd) > 1; |
454 | for ($i = $#hist; $i; --$i) { |
455 | last if $hist[$i] =~ $pat; |
456 | } |
457 | if (!$i) { |
458 | print OUT "No such command!\n\n"; |
459 | next CMD; |
460 | } |
461 | $cmd = $hist[$i] . "\n"; |
462 | print OUT $cmd; |
463 | redo CMD; }; |
464 | $cmd =~ /^H\b\s*(-(\d+))?/ && do { |
465 | $end = $2?($#hist-$2):0; |
466 | $hist = 0 if $hist < 0; |
467 | for ($i=$#hist; $i>$end; $i--) { |
468 | print OUT "$i: ",$hist[$i],"\n" |
469 | unless $hist[$i] =~ /^.?$/; |
470 | }; |
471 | next CMD; }; |
ed6116ce |
472 | $cmd =~ s/^p( .*)?$/print DB::OUT$1/; |
fe14fcc3 |
473 | $cmd =~ /^=/ && do { |
474 | if (local($k,$v) = ($cmd =~ /^=\s*(\S+)\s+(.*)/)) { |
475 | $alias{$k}="s~$k~$v~"; |
476 | print OUT "$k = $v\n"; |
477 | } elsif ($cmd =~ /^=\s*$/) { |
478 | foreach $k (sort keys(%alias)) { |
479 | if (($v = $alias{$k}) =~ s~^s\~$k\~(.*)\~$~$1~) { |
480 | print OUT "$k = $v\n"; |
481 | } else { |
482 | print OUT "$k\t$alias{$k}\n"; |
483 | }; |
33b78306 |
484 | }; |
485 | }; |
fe14fcc3 |
486 | next CMD; }; |
487 | } |
27e2fb84 |
488 | $evalarg = $cmd; &eval; |
76854fea |
489 | print OUT "\n"; |
a687059c |
490 | } |
491 | if ($post) { |
27e2fb84 |
492 | $evalarg = $post; &eval; |
a687059c |
493 | } |
494 | } |
a0d0e21e |
495 | ($@, $!, $,, $/, $\) = @saved; |
76854fea |
496 | } |
497 | |
498 | sub save { |
a0d0e21e |
499 | @saved = ($@, $!, $,, $/, $\, $^W); |
500 | $, = ""; $/ = "\n"; $\ = ""; $^W = 0; |
76854fea |
501 | } |
502 | |
27e2fb84 |
503 | # The following takes its argument via $evalarg to preserve current @_ |
504 | |
76854fea |
505 | sub eval { |
ed6116ce |
506 | eval "$usercontext $evalarg; &DB::save"; |
76854fea |
507 | print OUT $@; |
a687059c |
508 | } |
509 | |
510 | sub action { |
511 | local($action) = @_; |
512 | while ($action =~ s/\\$//) { |
513 | print OUT "+ "; |
76854fea |
514 | $action .= &gets; |
a687059c |
515 | } |
516 | $action; |
517 | } |
518 | |
76854fea |
519 | sub gets { |
520 | local($.); |
521 | <IN>; |
522 | } |
523 | |
a687059c |
524 | sub catch { |
525 | $signal = 1; |
526 | } |
527 | |
528 | sub sub { |
529 | push(@stack, $single); |
530 | $single &= 1; |
531 | $single |= 4 if $#stack == $deep; |
a687059c |
532 | if (wantarray) { |
533 | @i = &$sub; |
79a0689e |
534 | $single |= pop(@stack); |
535 | @i; |
a687059c |
536 | } |
537 | else { |
538 | $i = &$sub; |
79a0689e |
539 | $single |= pop(@stack); |
540 | $i; |
a687059c |
541 | } |
a687059c |
542 | } |
543 | |
a0d0e21e |
544 | $trace = $signal = $single = 0; # uninitialized warning suppression |
545 | |
a687059c |
546 | @hist = ('?'); |
ed6116ce |
547 | $SIG{'INT'} = "DB::catch"; |
a687059c |
548 | $deep = 100; # warning if stack gets this deep |
549 | $window = 10; |
550 | $preview = 3; |
551 | |
552 | @stack = (0); |
76854fea |
553 | @ARGS = @ARGV; |
a687059c |
554 | for (@args) { |
555 | s/'/\\'/g; |
556 | s/(.*)/'$1'/ unless /^-?[\d.]+$/; |
557 | } |
a687059c |
558 | |
83025b21 |
559 | if (-f $rcfile) { |
560 | do "./$rcfile"; |
a687059c |
561 | } |
83025b21 |
562 | elsif (-f "$ENV{'LOGDIR'}/$rcfile") { |
563 | do "$ENV{'LOGDIR'}/$rcfile"; |
a687059c |
564 | } |
83025b21 |
565 | elsif (-f "$ENV{'HOME'}/$rcfile") { |
566 | do "$ENV{'HOME'}/$rcfile"; |
a687059c |
567 | } |
568 | |
569 | 1; |