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 | |
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 | $emacs ? "enabled" : "available", |
50 | ".\n"); |
51 | print OUT "\nEnter h for help.\n\n"; |
a687059c |
52 | |
748a9306 |
53 | @ARGS; |
54 | |
a687059c |
55 | sub DB { |
76854fea |
56 | &save; |
748a9306 |
57 | ($pkg, $filename, $line) = caller; |
a0d0e21e |
58 | $usercontext = '($@, $!, $,, $/, $\, $^W) = @saved;' . |
748a9306 |
59 | "package $pkg;"; # this won't let them modify, alas |
ed6116ce |
60 | local(*dbline) = "::_<$filename"; |
76854fea |
61 | $max = $#dbline; |
62 | if (($stop,$action) = split(/\0/,$dbline{$line})) { |
a687059c |
63 | if ($stop eq '1') { |
64 | $signal |= 1; |
65 | } |
66 | else { |
ed6116ce |
67 | $evalarg = "\$DB::signal |= do {$stop;}"; &eval; |
76854fea |
68 | $dbline{$line} =~ s/;9($|\0)/$1/; |
a687059c |
69 | } |
70 | } |
71 | if ($single || $trace || $signal) { |
f0fcb552 |
72 | if ($emacs) { |
73 | print OUT "\032\032$filename:$line:0\n"; |
74 | } else { |
748a9306 |
75 | $prefix = $sub =~ /'|::/ ? "" : "${pkg}::"; |
a0d0e21e |
76 | $prefix .= "$sub($filename:"; |
77 | if (length($prefix) > 30) { |
78 | print OUT "$prefix$line):\n$line:\t",$dbline[$line]; |
79 | $prefix = ""; |
80 | $infix = ":\t"; |
81 | } |
82 | else { |
83 | $infix = "):\t"; |
84 | print OUT "$prefix$line$infix",$dbline[$line]; |
85 | } |
f0fcb552 |
86 | for ($i = $line + 1; $i <= $max && $dbline[$i] == 0; ++$i) { |
87 | last if $dbline[$i] =~ /^\s*(}|#|\n)/; |
a0d0e21e |
88 | print OUT "$prefix$i$infix",$dbline[$i]; |
f0fcb552 |
89 | } |
a687059c |
90 | } |
91 | } |
27e2fb84 |
92 | $evalarg = $action, &eval if $action; |
a687059c |
93 | if ($single || $signal) { |
27e2fb84 |
94 | $evalarg = $pre, &eval if $pre; |
a687059c |
95 | print OUT $#stack . " levels deep in subroutine calls!\n" |
96 | if $single & 4; |
97 | $start = $line; |
fe14fcc3 |
98 | CMD: |
76854fea |
99 | while ((print OUT " DB<", $#hist+1, "> "), $cmd=&gets) { |
fe14fcc3 |
100 | { |
101 | $single = 0; |
102 | $signal = 0; |
103 | $cmd eq '' && exit 0; |
104 | chop($cmd); |
105 | $cmd =~ s/\\$// && do { |
106 | print OUT " cont: "; |
107 | $cmd .= &gets; |
108 | redo CMD; |
109 | }; |
110 | $cmd =~ /^q$/ && exit 0; |
111 | $cmd =~ /^$/ && ($cmd = $laststep); |
112 | push(@hist,$cmd) if length($cmd) > 1; |
113 | ($i) = split(/\s+/,$cmd); |
114 | eval "\$cmd =~ $alias{$i}", print OUT $@ if $alias{$i}; |
115 | $cmd =~ /^h$/ && do { |
116 | print OUT " |
a687059c |
117 | T Stack trace. |
118 | s Single step. |
119 | n Next, steps over subroutine calls. |
76854fea |
120 | r Return from current subroutine. |
a687059c |
121 | c [line] Continue; optionally inserts a one-time-only breakpoint |
122 | at the specified line. |
123 | <CR> Repeat last n or s. |
124 | l min+incr List incr+1 lines starting at min. |
125 | l min-max List lines. |
126 | l line List line; |
127 | l List next window. |
128 | - List previous window. |
129 | w line List window around line. |
130 | l subname List subroutine. |
76854fea |
131 | f filename Switch to filename. |
a687059c |
132 | /pattern/ Search forwards for pattern; final / is optional. |
133 | ?pattern? Search backwards for pattern. |
134 | L List breakpoints and actions. |
135 | S List subroutine names. |
136 | t Toggle trace mode. |
137 | b [line] [condition] |
138 | Set breakpoint; line defaults to the current execution line; |
139 | condition breaks if it evaluates to true, defaults to \'1\'. |
140 | b subname [condition] |
141 | Set breakpoint at first line of subroutine. |
142 | d [line] Delete breakpoint. |
143 | D Delete all breakpoints. |
144 | a [line] command |
145 | Set an action to be done before the line is executed. |
146 | Sequence is: check for breakpoint, print line if necessary, |
147 | do action, prompt user if breakpoint or step, evaluate line. |
148 | A Delete all actions. |
76854fea |
149 | V [pkg [vars]] List some (default all) variables in package (default current). |
150 | X [vars] Same as \"V currentpackage [vars]\". |
a687059c |
151 | < command Define command before prompt. |
152 | > command Define command after prompt. |
153 | ! number Redo command (default previous command). |
154 | ! -number Redo number\'th to last command. |
155 | H -number Display last number commands (default all). |
156 | q or ^D Quit. |
ed6116ce |
157 | p expr Same as \"print DB::OUT expr\" in current package. |
33b78306 |
158 | = [alias value] Define a command alias, or list current aliases. |
76854fea |
159 | command Execute as a perl statement in current package. |
a687059c |
160 | |
161 | "; |
fe14fcc3 |
162 | next CMD; }; |
163 | $cmd =~ /^t$/ && do { |
164 | $trace = !$trace; |
165 | print OUT "Trace = ".($trace?"on":"off")."\n"; |
166 | next CMD; }; |
167 | $cmd =~ /^S$/ && do { |
168 | foreach $subname (sort(keys %sub)) { |
169 | print OUT $subname,"\n"; |
170 | } |
171 | next CMD; }; |
748a9306 |
172 | $cmd =~ s/^X\b/V $pkg/; |
fe14fcc3 |
173 | $cmd =~ /^V$/ && do { |
748a9306 |
174 | $cmd = "V $pkg"; }; |
fe14fcc3 |
175 | $cmd =~ /^V\b\s*(\S+)\s*(.*)/ && do { |
79072805 |
176 | local ($savout) = select(OUT); |
fe14fcc3 |
177 | $packname = $1; |
178 | @vars = split(' ',$2); |
ed6116ce |
179 | do 'dumpvar.pl' unless defined &main::dumpvar; |
180 | if (defined &main::dumpvar) { |
181 | &main::dumpvar($packname,@vars); |
fe14fcc3 |
182 | } |
183 | else { |
ed6116ce |
184 | print DB::OUT "dumpvar.pl not available.\n"; |
76854fea |
185 | } |
79072805 |
186 | select ($savout); |
fe14fcc3 |
187 | next CMD; }; |
188 | $cmd =~ /^f\b\s*(.*)/ && do { |
189 | $file = $1; |
190 | if (!$file) { |
191 | print OUT "The old f command is now the r command.\n"; |
192 | print OUT "The new f command switches filenames.\n"; |
193 | next CMD; |
a687059c |
194 | } |
a0d0e21e |
195 | if (!defined $main::{'_<' . $file}) { |
196 | if (($try) = grep(m#^_<.*$file#, keys %main::)) { |
fe14fcc3 |
197 | $file = substr($try,2); |
198 | print "\n$file:\n"; |
76854fea |
199 | } |
200 | } |
a0d0e21e |
201 | if (!defined $main::{'_<' . $file}) { |
fe14fcc3 |
202 | print OUT "There's no code here anything matching $file.\n"; |
203 | next CMD; |
204 | } |
205 | elsif ($file ne $filename) { |
ed6116ce |
206 | *dbline = "::_<$file"; |
fe14fcc3 |
207 | $max = $#dbline; |
208 | $filename = $file; |
209 | $start = 1; |
210 | $cmd = "l"; |
211 | } }; |
ed6116ce |
212 | $cmd =~ /^l\b\s*([':A-Za-z_][':\w]*)/ && do { |
fe14fcc3 |
213 | $subname = $1; |
ed6116ce |
214 | $subname = "main::" . $subname unless $subname =~ /'|::/; |
215 | $subname = "main" . $subname if substr($subname,0,1)eq "'"; |
216 | $subname = "main" . $subname if substr($subname,0,2)eq "::"; |
fe14fcc3 |
217 | ($file,$subrange) = split(/:/,$sub{$subname}); |
218 | if ($file ne $filename) { |
ed6116ce |
219 | *dbline = "::_<$file"; |
fe14fcc3 |
220 | $max = $#dbline; |
221 | $filename = $file; |
222 | } |
223 | if ($subrange) { |
224 | if (eval($subrange) < -$window) { |
225 | $subrange =~ s/-.*/+/; |
226 | } |
227 | $cmd = "l $subrange"; |
228 | } else { |
229 | print OUT "Subroutine $1 not found.\n"; |
230 | next CMD; |
231 | } }; |
232 | $cmd =~ /^w\b\s*(\d*)$/ && do { |
233 | $incr = $window - 1; |
234 | $start = $1 if $1; |
235 | $start -= $preview; |
236 | $cmd = 'l ' . $start . '-' . ($start + $incr); }; |
237 | $cmd =~ /^-$/ && do { |
238 | $incr = $window - 1; |
239 | $cmd = 'l ' . ($start-$window*2) . '+'; }; |
240 | $cmd =~ /^l$/ && do { |
241 | $incr = $window - 1; |
242 | $cmd = 'l ' . $start . '-' . ($start + $incr); }; |
243 | $cmd =~ /^l\b\s*(\d*)\+(\d*)$/ && do { |
244 | $start = $1 if $1; |
245 | $incr = $2; |
246 | $incr = $window - 1 unless $incr; |
247 | $cmd = 'l ' . $start . '-' . ($start + $incr); }; |
248 | $cmd =~ /^l\b\s*(([\d\$\.]+)([-,]([\d\$\.]+))?)?/ && do { |
249 | $end = (!$2) ? $max : ($4 ? $4 : $2); |
250 | $end = $max if $end > $max; |
251 | $i = $2; |
252 | $i = $line if $i eq '.'; |
253 | $i = 1 if $i < 1; |
f0fcb552 |
254 | if ($emacs) { |
255 | print OUT "\032\032$filename:$i:0\n"; |
256 | $i = $end; |
257 | } else { |
258 | for (; $i <= $end; $i++) { |
259 | print OUT "$i:\t", $dbline[$i]; |
260 | last if $signal; |
261 | } |
a687059c |
262 | } |
fe14fcc3 |
263 | $start = $i; # remember in case they want more |
264 | $start = $max if $start > $max; |
265 | next CMD; }; |
266 | $cmd =~ /^D$/ && do { |
267 | print OUT "Deleting all breakpoints...\n"; |
268 | for ($i = 1; $i <= $max ; $i++) { |
269 | if (defined $dbline{$i}) { |
270 | $dbline{$i} =~ s/^[^\0]+//; |
271 | if ($dbline{$i} =~ s/^\0?$//) { |
272 | delete $dbline{$i}; |
273 | } |
274 | } |
275 | } |
276 | next CMD; }; |
277 | $cmd =~ /^L$/ && do { |
278 | for ($i = 1; $i <= $max; $i++) { |
279 | if (defined $dbline{$i}) { |
280 | print OUT "$i:\t", $dbline[$i]; |
281 | ($stop,$action) = split(/\0/, $dbline{$i}); |
282 | print OUT " break if (", $stop, ")\n" |
283 | if $stop; |
284 | print OUT " action: ", $action, "\n" |
285 | if $action; |
286 | last if $signal; |
287 | } |
288 | } |
289 | next CMD; }; |
ed6116ce |
290 | $cmd =~ /^b\b\s*([':A-Za-z_][':\w]*)\s*(.*)/ && do { |
fe14fcc3 |
291 | $subname = $1; |
292 | $cond = $2 || '1'; |
748a9306 |
293 | $subname = "${pkg}::" . $subname |
a0d0e21e |
294 | unless $subname =~ /'|::/; |
fe14fcc3 |
295 | $subname = "main" . $subname if substr($subname,0,1) eq "'"; |
ed6116ce |
296 | $subname = "main" . $subname if substr($subname,0,2) eq "::"; |
83025b21 |
297 | ($filename,$i) = split(/:/, $sub{$subname}); |
298 | $i += 0; |
fe14fcc3 |
299 | if ($i) { |
ed6116ce |
300 | *dbline = "::_<$filename"; |
fe14fcc3 |
301 | ++$i while $dbline[$i] == 0 && $i < $#dbline; |
302 | $dbline{$i} =~ s/^[^\0]*/$cond/; |
303 | } else { |
304 | print OUT "Subroutine $subname not found.\n"; |
76854fea |
305 | } |
fe14fcc3 |
306 | next CMD; }; |
307 | $cmd =~ /^b\b\s*(\d*)\s*(.*)/ && do { |
308 | $i = ($1?$1:$line); |
309 | $cond = $2 || '1'; |
76854fea |
310 | if ($dbline[$i] == 0) { |
fe14fcc3 |
311 | print OUT "Line $i not breakable.\n"; |
312 | } else { |
313 | $dbline{$i} =~ s/^[^\0]*/$cond/; |
a687059c |
314 | } |
fe14fcc3 |
315 | next CMD; }; |
316 | $cmd =~ /^d\b\s*(\d+)?/ && do { |
317 | $i = ($1?$1:$line); |
318 | $dbline{$i} =~ s/^[^\0]*//; |
319 | delete $dbline{$i} if $dbline{$i} eq ''; |
320 | next CMD; }; |
321 | $cmd =~ /^A$/ && do { |
322 | for ($i = 1; $i <= $max ; $i++) { |
323 | if (defined $dbline{$i}) { |
324 | $dbline{$i} =~ s/\0[^\0]*//; |
325 | delete $dbline{$i} if $dbline{$i} eq ''; |
76854fea |
326 | } |
fe14fcc3 |
327 | } |
328 | next CMD; }; |
329 | $cmd =~ /^<\s*(.*)/ && do { |
a0d0e21e |
330 | $pre = action($1); |
fe14fcc3 |
331 | next CMD; }; |
332 | $cmd =~ /^>\s*(.*)/ && do { |
a0d0e21e |
333 | $post = action($1); |
fe14fcc3 |
334 | next CMD; }; |
335 | $cmd =~ /^a\b\s*(\d+)(\s+(.*))?/ && do { |
336 | $i = $1; |
337 | if ($dbline[$i] == 0) { |
338 | print OUT "Line $i may not have an action.\n"; |
339 | } else { |
340 | $dbline{$i} =~ s/\0[^\0]*//; |
a0d0e21e |
341 | $dbline{$i} .= "\0" . action($3); |
fe14fcc3 |
342 | } |
343 | next CMD; }; |
344 | $cmd =~ /^n$/ && do { |
345 | $single = 2; |
346 | $laststep = $cmd; |
347 | last CMD; }; |
348 | $cmd =~ /^s$/ && do { |
349 | $single = 1; |
350 | $laststep = $cmd; |
351 | last CMD; }; |
352 | $cmd =~ /^c\b\s*(\d*)\s*$/ && do { |
353 | $i = $1; |
354 | if ($i) { |
355 | if ($dbline[$i] == 0) { |
356 | print OUT "Line $i not breakable.\n"; |
357 | next CMD; |
76854fea |
358 | } |
fe14fcc3 |
359 | $dbline{$i} =~ s/(\0|$)/;9$1/; # add one-time-only b.p. |
76854fea |
360 | } |
fe14fcc3 |
361 | for ($i=0; $i <= $#stack; ) { |
362 | $stack[$i++] &= ~1; |
a687059c |
363 | } |
fe14fcc3 |
364 | last CMD; }; |
365 | $cmd =~ /^r$/ && do { |
366 | $stack[$#stack] |= 2; |
367 | last CMD; }; |
368 | $cmd =~ /^T$/ && do { |
369 | local($p,$f,$l,$s,$h,$a,@a,@sub); |
370 | for ($i = 1; ($p,$f,$l,$s,$h,$w) = caller($i); $i++) { |
a0d0e21e |
371 | @a = (); |
372 | for $arg (@args) { |
373 | $_ = "$arg"; |
ed6116ce |
374 | s/'/\\'/g; |
a0d0e21e |
375 | s/([^\0]*)/'$1'/ |
376 | unless /^(?: -?[\d.]+ | \*[\w:]* )$/x; |
ed6116ce |
377 | s/([\200-\377])/sprintf("M-%c",ord($1)&0177)/eg; |
378 | s/([\0-\37\177])/sprintf("^%c",ord($1)^64)/eg; |
a0d0e21e |
379 | push(@a, $_); |
fe14fcc3 |
380 | } |
381 | $w = $w ? '@ = ' : '$ = '; |
382 | $a = $h ? '(' . join(', ', @a) . ')' : ''; |
a0d0e21e |
383 | push(@sub, "$w$s$a from file $f line $l\n"); |
fe14fcc3 |
384 | last if $signal; |
a687059c |
385 | } |
fe14fcc3 |
386 | for ($i=0; $i <= $#sub; $i++) { |
387 | last if $signal; |
388 | print OUT $sub[$i]; |
a687059c |
389 | } |
fe14fcc3 |
390 | next CMD; }; |
391 | $cmd =~ /^\/(.*)$/ && do { |
392 | $inpat = $1; |
393 | $inpat =~ s:([^\\])/$:$1:; |
394 | if ($inpat ne "") { |
a0d0e21e |
395 | eval '$inpat =~ m'."\a$inpat\a"; |
fe14fcc3 |
396 | if ($@ ne "") { |
397 | print OUT "$@"; |
398 | next CMD; |
399 | } |
400 | $pat = $inpat; |
a687059c |
401 | } |
fe14fcc3 |
402 | $end = $start; |
403 | eval ' |
404 | for (;;) { |
405 | ++$start; |
406 | $start = 1 if ($start > $max); |
407 | last if ($start == $end); |
a0d0e21e |
408 | if ($dbline[$start] =~ m'."\a$pat\a".'i) { |
f0fcb552 |
409 | if ($emacs) { |
410 | print OUT "\032\032$filename:$start:0\n"; |
411 | } else { |
412 | print OUT "$start:\t", $dbline[$start], "\n"; |
413 | } |
fe14fcc3 |
414 | last; |
415 | } |
416 | } '; |
417 | print OUT "/$pat/: not found\n" if ($start == $end); |
418 | next CMD; }; |
419 | $cmd =~ /^\?(.*)$/ && do { |
420 | $inpat = $1; |
421 | $inpat =~ s:([^\\])\?$:$1:; |
422 | if ($inpat ne "") { |
a0d0e21e |
423 | eval '$inpat =~ m'."\a$inpat\a"; |
fe14fcc3 |
424 | if ($@ ne "") { |
425 | print OUT "$@"; |
426 | next CMD; |
427 | } |
428 | $pat = $inpat; |
429 | } |
430 | $end = $start; |
431 | eval ' |
432 | for (;;) { |
433 | --$start; |
434 | $start = $max if ($start <= 0); |
435 | last if ($start == $end); |
a0d0e21e |
436 | if ($dbline[$start] =~ m'."\a$pat\a".'i) { |
f0fcb552 |
437 | if ($emacs) { |
438 | print OUT "\032\032$filename:$start:0\n"; |
439 | } else { |
440 | print OUT "$start:\t", $dbline[$start], "\n"; |
441 | } |
fe14fcc3 |
442 | last; |
443 | } |
444 | } '; |
445 | print OUT "?$pat?: not found\n" if ($start == $end); |
446 | next CMD; }; |
447 | $cmd =~ /^!+\s*(-)?(\d+)?$/ && do { |
448 | pop(@hist) if length($cmd) > 1; |
449 | $i = ($1?($#hist-($2?$2:1)):($2?$2:$#hist)); |
450 | $cmd = $hist[$i] . "\n"; |
451 | print OUT $cmd; |
452 | redo CMD; }; |
453 | $cmd =~ /^!(.+)$/ && do { |
454 | $pat = "^$1"; |
455 | pop(@hist) if length($cmd) > 1; |
456 | for ($i = $#hist; $i; --$i) { |
457 | last if $hist[$i] =~ $pat; |
458 | } |
459 | if (!$i) { |
460 | print OUT "No such command!\n\n"; |
461 | next CMD; |
462 | } |
463 | $cmd = $hist[$i] . "\n"; |
464 | print OUT $cmd; |
465 | redo CMD; }; |
466 | $cmd =~ /^H\b\s*(-(\d+))?/ && do { |
467 | $end = $2?($#hist-$2):0; |
468 | $hist = 0 if $hist < 0; |
469 | for ($i=$#hist; $i>$end; $i--) { |
470 | print OUT "$i: ",$hist[$i],"\n" |
471 | unless $hist[$i] =~ /^.?$/; |
472 | }; |
473 | next CMD; }; |
ed6116ce |
474 | $cmd =~ s/^p( .*)?$/print DB::OUT$1/; |
fe14fcc3 |
475 | $cmd =~ /^=/ && do { |
476 | if (local($k,$v) = ($cmd =~ /^=\s*(\S+)\s+(.*)/)) { |
477 | $alias{$k}="s~$k~$v~"; |
478 | print OUT "$k = $v\n"; |
479 | } elsif ($cmd =~ /^=\s*$/) { |
480 | foreach $k (sort keys(%alias)) { |
481 | if (($v = $alias{$k}) =~ s~^s\~$k\~(.*)\~$~$1~) { |
482 | print OUT "$k = $v\n"; |
483 | } else { |
484 | print OUT "$k\t$alias{$k}\n"; |
485 | }; |
33b78306 |
486 | }; |
487 | }; |
fe14fcc3 |
488 | next CMD; }; |
489 | } |
27e2fb84 |
490 | $evalarg = $cmd; &eval; |
76854fea |
491 | print OUT "\n"; |
a687059c |
492 | } |
493 | if ($post) { |
27e2fb84 |
494 | $evalarg = $post; &eval; |
a687059c |
495 | } |
496 | } |
748a9306 |
497 | ($@, $!, $,, $/, $\, $^W) = @saved; |
498 | (); |
76854fea |
499 | } |
500 | |
501 | sub save { |
a0d0e21e |
502 | @saved = ($@, $!, $,, $/, $\, $^W); |
503 | $, = ""; $/ = "\n"; $\ = ""; $^W = 0; |
76854fea |
504 | } |
505 | |
27e2fb84 |
506 | # The following takes its argument via $evalarg to preserve current @_ |
507 | |
76854fea |
508 | sub eval { |
ed6116ce |
509 | eval "$usercontext $evalarg; &DB::save"; |
76854fea |
510 | print OUT $@; |
a687059c |
511 | } |
512 | |
513 | sub action { |
514 | local($action) = @_; |
515 | while ($action =~ s/\\$//) { |
516 | print OUT "+ "; |
76854fea |
517 | $action .= &gets; |
a687059c |
518 | } |
519 | $action; |
520 | } |
521 | |
76854fea |
522 | sub gets { |
523 | local($.); |
524 | <IN>; |
525 | } |
526 | |
a687059c |
527 | sub catch { |
528 | $signal = 1; |
529 | } |
530 | |
531 | sub sub { |
532 | push(@stack, $single); |
533 | $single &= 1; |
534 | $single |= 4 if $#stack == $deep; |
a687059c |
535 | if (wantarray) { |
536 | @i = &$sub; |
79a0689e |
537 | $single |= pop(@stack); |
538 | @i; |
a687059c |
539 | } |
540 | else { |
541 | $i = &$sub; |
79a0689e |
542 | $single |= pop(@stack); |
543 | $i; |
a687059c |
544 | } |
a687059c |
545 | } |
546 | |
a0d0e21e |
547 | $trace = $signal = $single = 0; # uninitialized warning suppression |
548 | |
a687059c |
549 | @hist = ('?'); |
ed6116ce |
550 | $SIG{'INT'} = "DB::catch"; |
a687059c |
551 | $deep = 100; # warning if stack gets this deep |
552 | $window = 10; |
553 | $preview = 3; |
554 | |
555 | @stack = (0); |
76854fea |
556 | @ARGS = @ARGV; |
a687059c |
557 | for (@args) { |
558 | s/'/\\'/g; |
559 | s/(.*)/'$1'/ unless /^-?[\d.]+$/; |
560 | } |
a687059c |
561 | |
83025b21 |
562 | if (-f $rcfile) { |
563 | do "./$rcfile"; |
a687059c |
564 | } |
83025b21 |
565 | elsif (-f "$ENV{'LOGDIR'}/$rcfile") { |
566 | do "$ENV{'LOGDIR'}/$rcfile"; |
a687059c |
567 | } |
83025b21 |
568 | elsif (-f "$ENV{'HOME'}/$rcfile") { |
569 | do "$ENV{'HOME'}/$rcfile"; |
a687059c |
570 | } |
571 | |
572 | 1; |