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1 | |
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2 | package IO::Handle; |
3 | |
4 | =head1 NAME |
5 | |
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6 | IO::Handle - supply object methods for I/O handles |
8add82fc |
7 | |
8 | =head1 SYNOPSIS |
9 | |
10 | use IO::Handle; |
11 | |
cf7fe8a2 |
12 | $io = new IO::Handle; |
13 | if ($io->fdopen(fileno(STDIN),"r")) { |
14 | print $io->getline; |
15 | $io->close; |
8add82fc |
16 | } |
17 | |
cf7fe8a2 |
18 | $io = new IO::Handle; |
19 | if ($io->fdopen(fileno(STDOUT),"w")) { |
20 | $io->print("Some text\n"); |
8add82fc |
21 | } |
22 | |
3370baa8 |
23 | use IO::Handle '_IOLBF'; |
cf7fe8a2 |
24 | $io->setvbuf($buffer_var, _IOLBF, 1024); |
8add82fc |
25 | |
cf7fe8a2 |
26 | undef $io; # automatically closes the file if it's open |
774d564b |
27 | |
8add82fc |
28 | autoflush STDOUT 1; |
29 | |
30 | =head1 DESCRIPTION |
31 | |
774d564b |
32 | C<IO::Handle> is the base class for all other IO handle classes. It is |
33 | not intended that objects of C<IO::Handle> would be created directly, |
34 | but instead C<IO::Handle> is inherited from by several other classes |
35 | in the IO hierarchy. |
36 | |
37 | If you are reading this documentation, looking for a replacement for |
38 | the C<FileHandle> package, then I suggest you read the documentation |
cf7fe8a2 |
39 | for C<IO::File> too. |
8add82fc |
40 | |
27d4819a |
41 | =head1 CONSTRUCTOR |
42 | |
43 | =over 4 |
44 | |
45 | =item new () |
8add82fc |
46 | |
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47 | Creates a new C<IO::Handle> object. |
8add82fc |
48 | |
27d4819a |
49 | =item new_from_fd ( FD, MODE ) |
50 | |
51 | Creates a C<IO::Handle> like C<new> does. |
52 | It requires two parameters, which are passed to the method C<fdopen>; |
53 | if the fdopen fails, the object is destroyed. Otherwise, it is returned |
54 | to the caller. |
55 | |
56 | =back |
57 | |
58 | =head1 METHODS |
8add82fc |
59 | |
8add82fc |
60 | See L<perlfunc> for complete descriptions of each of the following |
61 | supported C<IO::Handle> methods, which are just front ends for the |
62 | corresponding built-in functions: |
a6006777 |
63 | |
cf7fe8a2 |
64 | $io->close |
65 | $io->eof |
66 | $io->fileno |
67 | $io->format_write( [FORMAT_NAME] ) |
68 | $io->getc |
69 | $io->read ( BUF, LEN, [OFFSET] ) |
70 | $io->print ( ARGS ) |
71 | $io->printf ( FMT, [ARGS] ) |
72 | $io->stat |
73 | $io->sysread ( BUF, LEN, [OFFSET] ) |
2ecf2f18 |
74 | $io->syswrite ( BUF, [LEN, [OFFSET]] ) |
cf7fe8a2 |
75 | $io->truncate ( LEN ) |
8add82fc |
76 | |
77 | See L<perlvar> for complete descriptions of each of the following |
cf7fe8a2 |
78 | supported C<IO::Handle> methods. All of them return the previous |
79 | value of the attribute and takes an optional single argument that when |
80 | given will set the value. If no argument is given the previous value |
81 | is unchanged (except for $io->autoflush will actually turn ON |
82 | autoflush by default). |
8add82fc |
83 | |
cf7fe8a2 |
84 | $io->autoflush ( [BOOL] ) $| |
85 | $io->format_page_number( [NUM] ) $% |
86 | $io->format_lines_per_page( [NUM] ) $= |
87 | $io->format_lines_left( [NUM] ) $- |
88 | $io->format_name( [STR] ) $~ |
89 | $io->format_top_name( [STR] ) $^ |
90 | $io->input_line_number( [NUM]) $. |
91 | |
92 | The following methods are not supported on a per-filehandle basis. |
93 | |
94 | IO::Handle->format_line_break_characters( [STR] ) $: |
95 | IO::Handle->format_formfeed( [STR]) $^L |
96 | IO::Handle->output_field_separator( [STR] ) $, |
97 | IO::Handle->output_record_separator( [STR] ) $\ |
98 | |
99 | IO::Handle->input_record_separator( [STR] ) $/ |
8add82fc |
100 | |
101 | Furthermore, for doing normal I/O you might need these: |
102 | |
103 | =over |
104 | |
cf7fe8a2 |
105 | =item $io->fdopen ( FD, MODE ) |
948ecc40 |
106 | |
107 | C<fdopen> is like an ordinary C<open> except that its first parameter |
108 | is not a filename but rather a file handle name, a IO::Handle object, |
109 | or a file descriptor number. |
110 | |
cf7fe8a2 |
111 | =item $io->opened |
948ecc40 |
112 | |
a47f745f |
113 | Returns true if the object is currently a valid file descriptor, false |
114 | otherwise. |
948ecc40 |
115 | |
cf7fe8a2 |
116 | =item $io->getline |
8add82fc |
117 | |
cf7fe8a2 |
118 | This works like <$io> described in L<perlop/"I/O Operators"> |
91e74348 |
119 | except that it's more readable and can be safely called in a |
120 | list context but still returns just one line. |
8add82fc |
121 | |
cf7fe8a2 |
122 | =item $io->getlines |
8add82fc |
123 | |
91e74348 |
124 | This works like <$io> when called in a list context to read all |
125 | the remaining lines in a file, except that it's more readable. |
8add82fc |
126 | It will also croak() if accidentally called in a scalar context. |
127 | |
cf7fe8a2 |
128 | =item $io->ungetc ( ORD ) |
27d4819a |
129 | |
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130 | Pushes a character with the given ordinal value back onto the given |
cf7fe8a2 |
131 | handle's input stream. Only one character of pushback per handle is |
132 | guaranteed. |
27d4819a |
133 | |
cf7fe8a2 |
134 | =item $io->write ( BUF, LEN [, OFFSET ] ) |
27d4819a |
135 | |
948ecc40 |
136 | This C<write> is like C<write> found in C, that is it is the |
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137 | opposite of read. The wrapper for the perl C<write> function is |
138 | called C<format_write>. |
139 | |
cf7fe8a2 |
140 | =item $io->error |
948ecc40 |
141 | |
142 | Returns a true value if the given handle has experienced any errors |
a47f745f |
143 | since it was opened or since the last call to C<clearerr>, or if the |
144 | handle is invalid. It only returns false for a valid handle with no |
145 | outstanding errors. |
948ecc40 |
146 | |
cf7fe8a2 |
147 | =item $io->clearerr |
948ecc40 |
148 | |
a47f745f |
149 | Clear the given handle's error indicator. Returns -1 if the handle is |
150 | invalid, 0 otherwise. |
27d4819a |
151 | |
cf7fe8a2 |
152 | =item $io->sync |
153 | |
154 | C<sync> synchronizes a file's in-memory state with that on the |
155 | physical medium. C<sync> does not operate at the perlio api level, but |
a47f745f |
156 | operates on the file descriptor (similar to sysread, sysseek and |
157 | systell). This means that any data held at the perlio api level will not |
158 | be synchronized. To synchronize data that is buffered at the perlio api |
159 | level you must use the flush method. C<sync> is not implemented on all |
160 | platforms. Returns 0 on success, -1 on error, -1 for an invalid handle. |
161 | See L<fsync(3c)>. |
cf7fe8a2 |
162 | |
163 | =item $io->flush |
164 | |
165 | C<flush> causes perl to flush any buffered data at the perlio api level. |
166 | Any unread data in the buffer will be discarded, and any unwritten data |
a47f745f |
167 | will be written to the underlying file descriptor. Returns 0 on success, |
168 | or a negative value on error. |
cf7fe8a2 |
169 | |
170 | =item $io->printflush ( ARGS ) |
171 | |
172 | Turns on autoflush, print ARGS and then restores the autoflush status of the |
a47f745f |
173 | C<IO::Handle> object. Returns the return value from print. |
cf7fe8a2 |
174 | |
175 | =item $io->blocking ( [ BOOL ] ) |
176 | |
177 | If called with an argument C<blocking> will turn on non-blocking IO if |
178 | C<BOOL> is false, and turn it off if C<BOOL> is true. |
179 | |
180 | C<blocking> will return the value of the previous setting, or the |
181 | current setting if C<BOOL> is not given. |
182 | |
183 | If an error occurs C<blocking> will return undef and C<$!> will be set. |
184 | |
8add82fc |
185 | =back |
186 | |
cf7fe8a2 |
187 | |
948ecc40 |
188 | If the C functions setbuf() and/or setvbuf() are available, then |
189 | C<IO::Handle::setbuf> and C<IO::Handle::setvbuf> set the buffering |
190 | policy for an IO::Handle. The calling sequences for the Perl functions |
191 | are the same as their C counterparts--including the constants C<_IOFBF>, |
192 | C<_IOLBF>, and C<_IONBF> for setvbuf()--except that the buffer parameter |
a47f745f |
193 | specifies a scalar variable to use as a buffer. You should only |
194 | change the buffer before any I/O, or immediately after calling flush. |
195 | |
196 | WARNING: A variable used as a buffer by C<setbuf> or C<setvbuf> B<must not |
197 | be modified> in any way until the IO::Handle is closed or C<setbuf> or |
198 | C<setvbuf> is called again, or memory corruption may result! Remember that |
199 | the order of global destruction is undefined, so even if your buffer |
200 | variable remains in scope until program termination, it may be undefined |
201 | before the file IO::Handle is closed. Note that you need to import the |
202 | constants C<_IOFBF>, C<_IOLBF>, and C<_IONBF> explicitly. Like C, setbuf |
203 | returns nothing, setvbuf returns 0 on success, -1 on failure. |
948ecc40 |
204 | |
205 | Lastly, there is a special method for working under B<-T> and setuid/gid |
206 | scripts: |
515e7bd7 |
207 | |
208 | =over |
209 | |
cf7fe8a2 |
210 | =item $io->untaint |
515e7bd7 |
211 | |
212 | Marks the object as taint-clean, and as such data read from it will also |
213 | be considered taint-clean. Note that this is a very trusting action to |
214 | take, and appropriate consideration for the data source and potential |
a47f745f |
215 | vulnerability should be kept in mind. Returns 0 on success, -1 if setting |
216 | the taint-clean flag failed. (eg invalid handle) |
515e7bd7 |
217 | |
218 | =back |
219 | |
27d4819a |
220 | =head1 NOTE |
8add82fc |
221 | |
cf7fe8a2 |
222 | A C<IO::Handle> object is a reference to a symbol/GLOB reference (see |
223 | the C<Symbol> package). Some modules that |
8add82fc |
224 | inherit from C<IO::Handle> may want to keep object related variables |
225 | in the hash table part of the GLOB. In an attempt to prevent modules |
226 | trampling on each other I propose the that any such module should prefix |
227 | its variables with its own name separated by _'s. For example the IO::Socket |
228 | module keeps a C<timeout> variable in 'io_socket_timeout'. |
229 | |
230 | =head1 SEE ALSO |
231 | |
232 | L<perlfunc>, |
233 | L<perlop/"I/O Operators">, |
774d564b |
234 | L<IO::File> |
8add82fc |
235 | |
236 | =head1 BUGS |
237 | |
238 | Due to backwards compatibility, all filehandles resemble objects |
239 | of class C<IO::Handle>, or actually classes derived from that class. |
240 | They actually aren't. Which means you can't derive your own |
241 | class from C<IO::Handle> and inherit those methods. |
242 | |
243 | =head1 HISTORY |
244 | |
cf7fe8a2 |
245 | Derived from FileHandle.pm by Graham Barr E<lt>F<gbarr@pobox.com>E<gt> |
8add82fc |
246 | |
247 | =cut |
248 | |
17f410f9 |
249 | require 5.005_64; |
7a4c00b4 |
250 | use strict; |
17f410f9 |
251 | our($VERSION, @EXPORT_OK, @ISA); |
8add82fc |
252 | use Carp; |
253 | use Symbol; |
254 | use SelectSaver; |
cf7fe8a2 |
255 | use IO (); # Load the XS module |
8add82fc |
256 | |
257 | require Exporter; |
258 | @ISA = qw(Exporter); |
259 | |
cf7fe8a2 |
260 | $VERSION = "1.21"; |
8add82fc |
261 | |
262 | @EXPORT_OK = qw( |
263 | autoflush |
264 | output_field_separator |
265 | output_record_separator |
266 | input_record_separator |
267 | input_line_number |
268 | format_page_number |
269 | format_lines_per_page |
270 | format_lines_left |
271 | format_name |
272 | format_top_name |
273 | format_line_break_characters |
274 | format_formfeed |
275 | format_write |
276 | |
277 | print |
278 | printf |
279 | getline |
280 | getlines |
281 | |
cf7fe8a2 |
282 | printflush |
283 | flush |
284 | |
8add82fc |
285 | SEEK_SET |
286 | SEEK_CUR |
287 | SEEK_END |
288 | _IOFBF |
289 | _IOLBF |
290 | _IONBF |
8add82fc |
291 | ); |
292 | |
8add82fc |
293 | ################################################ |
294 | ## Constructors, destructors. |
295 | ## |
296 | |
297 | sub new { |
27d4819a |
298 | my $class = ref($_[0]) || $_[0] || "IO::Handle"; |
299 | @_ == 1 or croak "usage: new $class"; |
cf7fe8a2 |
300 | my $io = gensym; |
301 | bless $io, $class; |
8add82fc |
302 | } |
303 | |
304 | sub new_from_fd { |
27d4819a |
305 | my $class = ref($_[0]) || $_[0] || "IO::Handle"; |
306 | @_ == 3 or croak "usage: new_from_fd $class FD, MODE"; |
cf7fe8a2 |
307 | my $io = gensym; |
c927212d |
308 | shift; |
cf7fe8a2 |
309 | IO::Handle::fdopen($io, @_) |
8add82fc |
310 | or return undef; |
cf7fe8a2 |
311 | bless $io, $class; |
8add82fc |
312 | } |
313 | |
98d4926f |
314 | # |
315 | # There is no need for DESTROY to do anything, because when the |
316 | # last reference to an IO object is gone, Perl automatically |
317 | # closes its associated files (if any). However, to avoid any |
318 | # attempts to autoload DESTROY, we here define it to do nothing. |
319 | # |
320 | sub DESTROY {} |
7a4c00b4 |
321 | |
8add82fc |
322 | |
323 | ################################################ |
324 | ## Open and close. |
325 | ## |
326 | |
327 | sub _open_mode_string { |
328 | my ($mode) = @_; |
329 | $mode =~ /^\+?(<|>>?)$/ |
330 | or $mode =~ s/^r(\+?)$/$1</ |
331 | or $mode =~ s/^w(\+?)$/$1>/ |
332 | or $mode =~ s/^a(\+?)$/$1>>/ |
333 | or croak "IO::Handle: bad open mode: $mode"; |
334 | $mode; |
335 | } |
336 | |
337 | sub fdopen { |
cf7fe8a2 |
338 | @_ == 3 or croak 'usage: $io->fdopen(FD, MODE)'; |
339 | my ($io, $fd, $mode) = @_; |
8add82fc |
340 | local(*GLOB); |
341 | |
342 | if (ref($fd) && "".$fd =~ /GLOB\(/o) { |
343 | # It's a glob reference; Alias it as we cannot get name of anon GLOBs |
344 | my $n = qualify(*GLOB); |
345 | *GLOB = *{*$fd}; |
346 | $fd = $n; |
347 | } elsif ($fd =~ m#^\d+$#) { |
348 | # It's an FD number; prefix with "=". |
349 | $fd = "=$fd"; |
350 | } |
351 | |
cf7fe8a2 |
352 | open($io, _open_mode_string($mode) . '&' . $fd) |
353 | ? $io : undef; |
8add82fc |
354 | } |
355 | |
356 | sub close { |
cf7fe8a2 |
357 | @_ == 1 or croak 'usage: $io->close()'; |
358 | my($io) = @_; |
8add82fc |
359 | |
cf7fe8a2 |
360 | close($io); |
8add82fc |
361 | } |
362 | |
363 | ################################################ |
364 | ## Normal I/O functions. |
365 | ## |
366 | |
8add82fc |
367 | # flock |
8add82fc |
368 | # select |
8add82fc |
369 | |
370 | sub opened { |
cf7fe8a2 |
371 | @_ == 1 or croak 'usage: $io->opened()'; |
8add82fc |
372 | defined fileno($_[0]); |
373 | } |
374 | |
375 | sub fileno { |
cf7fe8a2 |
376 | @_ == 1 or croak 'usage: $io->fileno()'; |
8add82fc |
377 | fileno($_[0]); |
378 | } |
379 | |
380 | sub getc { |
cf7fe8a2 |
381 | @_ == 1 or croak 'usage: $io->getc()'; |
8add82fc |
382 | getc($_[0]); |
383 | } |
384 | |
8add82fc |
385 | sub eof { |
cf7fe8a2 |
386 | @_ == 1 or croak 'usage: $io->eof()'; |
8add82fc |
387 | eof($_[0]); |
388 | } |
389 | |
390 | sub print { |
cf7fe8a2 |
391 | @_ or croak 'usage: $io->print(ARGS)'; |
8add82fc |
392 | my $this = shift; |
393 | print $this @_; |
394 | } |
395 | |
396 | sub printf { |
cf7fe8a2 |
397 | @_ >= 2 or croak 'usage: $io->printf(FMT,[ARGS])'; |
8add82fc |
398 | my $this = shift; |
399 | printf $this @_; |
400 | } |
401 | |
402 | sub getline { |
cf7fe8a2 |
403 | @_ == 1 or croak 'usage: $io->getline()'; |
8add82fc |
404 | my $this = shift; |
405 | return scalar <$this>; |
406 | } |
407 | |
f86702cc |
408 | *gets = \&getline; # deprecated |
409 | |
8add82fc |
410 | sub getlines { |
cf7fe8a2 |
411 | @_ == 1 or croak 'usage: $io->getlines()'; |
8add82fc |
412 | wantarray or |
cf7fe8a2 |
413 | croak 'Can\'t call $io->getlines in a scalar context, use $io->getline'; |
27d4819a |
414 | my $this = shift; |
8add82fc |
415 | return <$this>; |
416 | } |
417 | |
418 | sub truncate { |
cf7fe8a2 |
419 | @_ == 2 or croak 'usage: $io->truncate(LEN)'; |
8add82fc |
420 | truncate($_[0], $_[1]); |
421 | } |
422 | |
423 | sub read { |
cf7fe8a2 |
424 | @_ == 3 || @_ == 4 or croak 'usage: $io->read(BUF, LEN [, OFFSET])'; |
8add82fc |
425 | read($_[0], $_[1], $_[2], $_[3] || 0); |
426 | } |
427 | |
27d4819a |
428 | sub sysread { |
cf7fe8a2 |
429 | @_ == 3 || @_ == 4 or croak 'usage: $io->sysread(BUF, LEN [, OFFSET])'; |
27d4819a |
430 | sysread($_[0], $_[1], $_[2], $_[3] || 0); |
431 | } |
432 | |
8add82fc |
433 | sub write { |
8fd73a68 |
434 | @_ >= 2 && @_ <= 4 or croak 'usage: $io->write(BUF [, LEN [, OFFSET]])'; |
8add82fc |
435 | local($\) = ""; |
8fd73a68 |
436 | $_[2] = length($_[1]) unless defined $_[2]; |
8add82fc |
437 | print { $_[0] } substr($_[1], $_[3] || 0, $_[2]); |
438 | } |
439 | |
27d4819a |
440 | sub syswrite { |
8fd73a68 |
441 | @_ >= 2 && @_ <= 4 or croak 'usage: $io->syswrite(BUF [, LEN [, OFFSET]])'; |
2ecf2f18 |
442 | if (defined($_[2])) { |
443 | syswrite($_[0], $_[1], $_[2], $_[3] || 0); |
444 | } else { |
445 | syswrite($_[0], $_[1]); |
446 | } |
27d4819a |
447 | } |
448 | |
8add82fc |
449 | sub stat { |
cf7fe8a2 |
450 | @_ == 1 or croak 'usage: $io->stat()'; |
8add82fc |
451 | stat($_[0]); |
452 | } |
453 | |
454 | ################################################ |
455 | ## State modification functions. |
456 | ## |
457 | |
458 | sub autoflush { |
cf7fe8a2 |
459 | my $old = new SelectSaver qualify($_[0], caller); |
8add82fc |
460 | my $prev = $|; |
461 | $| = @_ > 1 ? $_[1] : 1; |
462 | $prev; |
463 | } |
464 | |
465 | sub output_field_separator { |
cf7fe8a2 |
466 | carp "output_field_separator is not supported on a per-handle basis" |
467 | if ref($_[0]); |
8add82fc |
468 | my $prev = $,; |
469 | $, = $_[1] if @_ > 1; |
470 | $prev; |
471 | } |
472 | |
473 | sub output_record_separator { |
cf7fe8a2 |
474 | carp "output_record_separator is not supported on a per-handle basis" |
475 | if ref($_[0]); |
8add82fc |
476 | my $prev = $\; |
477 | $\ = $_[1] if @_ > 1; |
478 | $prev; |
479 | } |
480 | |
481 | sub input_record_separator { |
cf7fe8a2 |
482 | carp "input_record_separator is not supported on a per-handle basis" |
483 | if ref($_[0]); |
8add82fc |
484 | my $prev = $/; |
485 | $/ = $_[1] if @_ > 1; |
486 | $prev; |
487 | } |
488 | |
489 | sub input_line_number { |
91cce263 |
490 | local $.; |
491 | my $tell = tell qualify($_[0], caller) if ref($_[0]); |
492 | my $prev = $.; |
493 | $. = $_[1] if @_ > 1; |
494 | $prev; |
495 | } |
91cce263 |
496 | |
8add82fc |
497 | sub format_page_number { |
b61d194c |
498 | my $old = new SelectSaver qualify($_[0], caller) if ref($_[0]); |
8add82fc |
499 | my $prev = $%; |
500 | $% = $_[1] if @_ > 1; |
501 | $prev; |
502 | } |
503 | |
504 | sub format_lines_per_page { |
b61d194c |
505 | my $old = new SelectSaver qualify($_[0], caller) if ref($_[0]); |
8add82fc |
506 | my $prev = $=; |
507 | $= = $_[1] if @_ > 1; |
508 | $prev; |
509 | } |
510 | |
511 | sub format_lines_left { |
b61d194c |
512 | my $old = new SelectSaver qualify($_[0], caller) if ref($_[0]); |
8add82fc |
513 | my $prev = $-; |
514 | $- = $_[1] if @_ > 1; |
515 | $prev; |
516 | } |
517 | |
518 | sub format_name { |
b61d194c |
519 | my $old = new SelectSaver qualify($_[0], caller) if ref($_[0]); |
8add82fc |
520 | my $prev = $~; |
521 | $~ = qualify($_[1], caller) if @_ > 1; |
522 | $prev; |
523 | } |
524 | |
525 | sub format_top_name { |
b61d194c |
526 | my $old = new SelectSaver qualify($_[0], caller) if ref($_[0]); |
8add82fc |
527 | my $prev = $^; |
528 | $^ = qualify($_[1], caller) if @_ > 1; |
529 | $prev; |
530 | } |
531 | |
532 | sub format_line_break_characters { |
cf7fe8a2 |
533 | carp "format_line_break_characters is not supported on a per-handle basis" |
534 | if ref($_[0]); |
8add82fc |
535 | my $prev = $:; |
536 | $: = $_[1] if @_ > 1; |
537 | $prev; |
538 | } |
539 | |
540 | sub format_formfeed { |
cf7fe8a2 |
541 | carp "format_formfeed is not supported on a per-handle basis" |
542 | if ref($_[0]); |
8add82fc |
543 | my $prev = $^L; |
544 | $^L = $_[1] if @_ > 1; |
545 | $prev; |
546 | } |
547 | |
548 | sub formline { |
cf7fe8a2 |
549 | my $io = shift; |
8add82fc |
550 | my $picture = shift; |
551 | local($^A) = $^A; |
552 | local($\) = ""; |
553 | formline($picture, @_); |
cf7fe8a2 |
554 | print $io $^A; |
8add82fc |
555 | } |
556 | |
557 | sub format_write { |
cf7fe8a2 |
558 | @_ < 3 || croak 'usage: $io->write( [FORMAT_NAME] )'; |
8add82fc |
559 | if (@_ == 2) { |
cf7fe8a2 |
560 | my ($io, $fmt) = @_; |
561 | my $oldfmt = $io->format_name($fmt); |
562 | CORE::write($io); |
563 | $io->format_name($oldfmt); |
8add82fc |
564 | } else { |
56f7f34b |
565 | CORE::write($_[0]); |
8add82fc |
566 | } |
567 | } |
568 | |
21e970cc |
569 | # XXX undocumented |
27d4819a |
570 | sub fcntl { |
cf7fe8a2 |
571 | @_ == 3 || croak 'usage: $io->fcntl( OP, VALUE );'; |
21e970cc |
572 | my ($io, $op) = @_; |
573 | return fcntl($io, $op, $_[2]); |
27d4819a |
574 | } |
575 | |
21e970cc |
576 | # XXX undocumented |
27d4819a |
577 | sub ioctl { |
cf7fe8a2 |
578 | @_ == 3 || croak 'usage: $io->ioctl( OP, VALUE );'; |
21e970cc |
579 | my ($io, $op) = @_; |
580 | return ioctl($io, $op, $_[2]); |
27d4819a |
581 | } |
8add82fc |
582 | |
cf7fe8a2 |
583 | # this sub is for compatability with older releases of IO that used |
584 | # a sub called constant to detemine if a constant existed -- GMB |
585 | # |
586 | # The SEEK_* and _IO?BF constants were the only constants at that time |
587 | # any new code should just chech defined(&CONSTANT_NAME) |
588 | |
589 | sub constant { |
590 | no strict 'refs'; |
591 | my $name = shift; |
592 | (($name =~ /^(SEEK_(SET|CUR|END)|_IO[FLN]BF)$/) && defined &{$name}) |
593 | ? &{$name}() : undef; |
594 | } |
595 | |
596 | |
597 | # so that flush.pl can be depriciated |
598 | |
599 | sub printflush { |
600 | my $io = shift; |
601 | my $old = new SelectSaver qualify($io, caller) if ref($io); |
602 | local $| = 1; |
603 | if(ref($io)) { |
604 | print $io @_; |
605 | } |
606 | else { |
607 | print @_; |
608 | } |
609 | } |
610 | |
8add82fc |
611 | 1; |