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f7deaa1a | 1 | /* |
09a101d6 | 2 | * "$Id: rss.c 6596 2007-06-21 22:42:25Z mike $" |
f7deaa1a | 3 | * |
4 | * RSS notifier for the Common UNIX Printing System (CUPS). | |
5 | * | |
6 | * Copyright 2007 by Easy Software Products. | |
7 | * | |
8 | * These coded instructions, statements, and computer programs are the | |
9 | * property of Easy Software Products and are protected by Federal | |
10 | * copyright law. Distribution and use rights are outlined in the file | |
11 | * "LICENSE.txt" which should have been included with this file. If this | |
12 | * file is missing or damaged please contact Easy Software Products | |
13 | * at: | |
14 | * | |
15 | * Attn: CUPS Licensing Information | |
16 | * Easy Software Products | |
17 | * 44141 Airport View Drive, Suite 204 | |
18 | * Hollywood, Maryland 20636 USA | |
19 | * | |
20 | * Voice: (301) 373-9600 | |
21 | * EMail: cups-info@cups.org | |
22 | * WWW: http://www.cups.org | |
23 | * | |
24 | * Contents: | |
25 | * | |
26 | * main() - Main entry for the test notifier. | |
27 | * compare_rss() - Compare two messages. | |
28 | * delete_message() - Free all memory used by a message. | |
29 | * load_rss() - Load an existing RSS feed file. | |
30 | * new_message() - Create a new RSS message. | |
31 | * password_cb() - Return the cached password. | |
32 | * save_rss() - Save messages to a RSS file. | |
33 | * xml_escape() - Copy a string, escaping &, <, and > as needed. | |
34 | */ | |
35 | ||
36 | /* | |
37 | * Include necessary headers... | |
38 | */ | |
39 | ||
40 | #include <cups/cups.h> | |
41 | #include <cups/language.h> | |
42 | #include <cups/string.h> | |
43 | #include <cups/array.h> | |
44 | #include <errno.h> | |
45 | ||
46 | ||
47 | /* | |
48 | * Structures... | |
49 | */ | |
50 | ||
51 | typedef struct _cups_rss_s /**** RSS message data ****/ | |
52 | { | |
53 | int sequence_number; /* notify-sequence-number */ | |
54 | char *subject, /* Message subject/summary */ | |
55 | *text, /* Message text */ | |
56 | *link_url; /* Link to printer */ | |
57 | time_t event_time; /* When the event occurred */ | |
58 | } _cups_rss_t; | |
59 | ||
60 | ||
61 | /* | |
62 | * Local globals... | |
63 | */ | |
64 | ||
65 | static char *rss_password; /* Password for remote RSS */ | |
66 | ||
67 | ||
68 | /* | |
69 | * Local functions... | |
70 | */ | |
71 | ||
72 | static int compare_rss(_cups_rss_t *a, _cups_rss_t *b); | |
73 | static void delete_message(_cups_rss_t *rss); | |
74 | static void load_rss(cups_array_t *rss, const char *filename); | |
75 | static _cups_rss_t *new_message(int sequence_number, char *subject, | |
76 | char *text, char *link_url, | |
77 | time_t event_time); | |
78 | static const char *password_cb(const char *prompt); | |
79 | static int save_rss(cups_array_t *rss, const char *filename, | |
80 | const char *baseurl); | |
81 | static char *xml_escape(const char *s); | |
82 | ||
83 | ||
84 | /* | |
85 | * 'main()' - Main entry for the test notifier. | |
86 | */ | |
87 | ||
88 | int /* O - Exit status */ | |
89 | main(int argc, /* I - Number of command-line arguments */ | |
90 | char *argv[]) /* I - Command-line arguments */ | |
91 | { | |
92 | int i; /* Looping var */ | |
93 | ipp_t *event; /* Event from scheduler */ | |
94 | ipp_state_t state; /* IPP event state */ | |
95 | char scheme[32], /* URI scheme ("rss") */ | |
96 | username[256], /* Username for remote RSS */ | |
97 | host[1024], /* Hostname for remote RSS */ | |
98 | resource[1024], /* RSS file */ | |
99 | *options; /* Options */ | |
100 | int port, /* Port number for remote RSS */ | |
101 | max_events; /* Maximum number of events */ | |
102 | http_t *http; /* Connection to remote server */ | |
103 | http_status_t status; /* HTTP GET/PUT status code */ | |
104 | char filename[1024], /* Local filename */ | |
105 | newname[1024]; /* filename.N */ | |
106 | cups_lang_t *language; /* Language information */ | |
107 | ipp_attribute_t *printer_up_time, /* Timestamp on event */ | |
108 | *notify_sequence_number,/* Sequence number */ | |
109 | *notify_printer_uri; /* Printer URI */ | |
110 | char *subject, /* Subject for notification message */ | |
111 | *text, /* Text for notification message */ | |
112 | link_url[1024], /* Link to printer */ | |
113 | link_scheme[32], /* Scheme for link */ | |
114 | link_username[256], /* Username for link */ | |
115 | link_host[1024], /* Host for link */ | |
116 | link_resource[1024]; /* Resource for link */ | |
117 | int link_port; /* Link port */ | |
118 | cups_array_t *rss; /* RSS message array */ | |
119 | _cups_rss_t *msg; /* RSS message */ | |
120 | char baseurl[1024]; /* Base URL */ | |
121 | ||
122 | ||
123 | fprintf(stderr, "DEBUG: argc=%d\n", argc); | |
124 | for (i = 0; i < argc; i ++) | |
125 | fprintf(stderr, "DEBUG: argv[%d]=\"%s\"\n", i, argv[i]); | |
126 | ||
127 | /* | |
128 | * See whether we are publishing this RSS feed locally or remotely... | |
129 | */ | |
130 | ||
131 | if (httpSeparateURI(HTTP_URI_CODING_ALL, argv[1], scheme, sizeof(scheme), | |
132 | username, sizeof(username), host, sizeof(host), &port, | |
133 | resource, sizeof(resource)) < HTTP_URI_OK) | |
134 | { | |
135 | fprintf(stderr, "ERROR: Bad RSS URI \"%s\"!\n", argv[1]); | |
136 | return (1); | |
137 | } | |
138 | ||
139 | max_events = 20; | |
140 | ||
141 | if ((options = strchr(resource, '?')) != NULL) | |
142 | { | |
143 | *options++ = '\0'; | |
144 | ||
145 | if (!strncmp(options, "max_events=", 11)) | |
146 | { | |
147 | max_events = atoi(options + 11); | |
148 | ||
149 | if (max_events <= 0) | |
150 | max_events = 20; | |
151 | } | |
152 | } | |
153 | ||
154 | rss = cupsArrayNew((cups_array_func_t)compare_rss, NULL); | |
155 | ||
156 | if (host[0]) | |
157 | { | |
158 | /* | |
159 | * Remote feed, see if we can get the current file... | |
160 | */ | |
161 | ||
162 | int fd; /* Temporary file */ | |
163 | ||
164 | ||
165 | if ((rss_password = strchr(username, ':')) != NULL) | |
166 | *rss_password++ = '\0'; | |
167 | ||
168 | cupsSetPasswordCB(password_cb); | |
169 | cupsSetUser(username); | |
170 | ||
171 | if ((fd = cupsTempFd(filename, sizeof(filename))) < 0) | |
172 | { | |
173 | fprintf(stderr, "ERROR: Unable to create temporary file: %s\n", | |
174 | strerror(errno)); | |
175 | ||
176 | return (1); | |
177 | } | |
178 | ||
179 | if ((http = httpConnect(host, port)) == NULL) | |
180 | { | |
181 | fprintf(stderr, "ERROR: Unable to connect to %s on port %d: %s\n", | |
182 | host, port, strerror(errno)); | |
183 | ||
184 | close(fd); | |
185 | unlink(filename); | |
186 | ||
187 | return (1); | |
188 | } | |
189 | ||
190 | status = cupsGetFd(http, resource, fd); | |
191 | ||
192 | close(fd); | |
193 | ||
194 | if (status != HTTP_OK && status != HTTP_NOT_FOUND) | |
195 | { | |
196 | fprintf(stderr, "ERROR: Unable to GET %s from %s on port %d: %d %s\n", | |
197 | resource, host, port, status, httpStatus(status)); | |
198 | ||
199 | httpClose(http); | |
200 | unlink(filename); | |
201 | ||
202 | return (1); | |
203 | } | |
204 | ||
205 | strlcpy(newname, filename, sizeof(newname)); | |
206 | ||
207 | httpAssembleURI(HTTP_URI_CODING_ALL, baseurl, sizeof(baseurl), "http", | |
208 | NULL, host, port, resource); | |
209 | } | |
210 | else | |
211 | { | |
212 | const char *cachedir, /* CUPS_CACHEDIR */ | |
213 | *server_name, /* SERVER_NAME */ | |
214 | *server_port; /* SERVER_PORT */ | |
215 | ||
216 | ||
217 | http = NULL; | |
218 | ||
219 | if ((cachedir = getenv("CUPS_CACHEDIR")) == NULL) | |
220 | cachedir = CUPS_CACHEDIR; | |
221 | ||
222 | if ((server_name = getenv("SERVER_NAME")) == NULL) | |
223 | server_name = "localhost"; | |
224 | ||
225 | if ((server_port = getenv("SERVER_PORT")) == NULL) | |
226 | server_port = "631"; | |
227 | ||
228 | snprintf(filename, sizeof(filename), "%s/rss%s", cachedir, resource); | |
229 | snprintf(newname, sizeof(newname), "%s.N", filename); | |
230 | ||
231 | httpAssembleURIf(HTTP_URI_CODING_ALL, baseurl, sizeof(baseurl), "http", | |
232 | NULL, server_name, atoi(server_port), "/rss%s", resource); | |
233 | } | |
234 | ||
235 | /* | |
236 | * Load the previous RSS file, if any... | |
237 | */ | |
238 | ||
239 | load_rss(rss, filename); | |
240 | ||
241 | /* | |
242 | * Localize for the user's chosen language... | |
243 | */ | |
244 | ||
245 | language = cupsLangDefault(); | |
246 | ||
247 | /* | |
248 | * Read events and update the RSS file until we are out of events. | |
249 | */ | |
250 | ||
251 | for (;;) | |
252 | { | |
253 | /* | |
254 | * Read the next event... | |
255 | */ | |
256 | ||
257 | event = ippNew(); | |
258 | while ((state = ippReadFile(0, event)) != IPP_DATA) | |
259 | { | |
260 | if (state <= IPP_IDLE) | |
261 | break; | |
262 | } | |
263 | ||
264 | if (state == IPP_ERROR) | |
265 | fputs("DEBUG: ippReadFile() returned IPP_ERROR!\n", stderr); | |
266 | ||
267 | if (state <= IPP_IDLE) | |
268 | { | |
269 | ippDelete(event); | |
270 | ||
271 | if (http) | |
272 | unlink(filename); | |
273 | ||
274 | httpClose(http); | |
275 | ||
276 | return (0); | |
277 | } | |
278 | ||
279 | /* | |
280 | * Collect the info from the event... | |
281 | */ | |
282 | ||
283 | printer_up_time = ippFindAttribute(event, "printer-up-time", | |
284 | IPP_TAG_INTEGER); | |
285 | notify_sequence_number = ippFindAttribute(event, "notify-sequence-number", | |
286 | IPP_TAG_INTEGER); | |
287 | notify_printer_uri = ippFindAttribute(event, "notify-printer-uri", | |
288 | IPP_TAG_URI); | |
289 | subject = cupsNotifySubject(language, event); | |
290 | text = cupsNotifyText(language, event); | |
291 | ||
292 | if (printer_up_time && notify_sequence_number && subject && text) | |
293 | { | |
294 | /* | |
295 | * Create a new RSS message... | |
296 | */ | |
297 | ||
298 | if (notify_printer_uri) | |
299 | { | |
300 | httpSeparateURI(HTTP_URI_CODING_ALL, | |
301 | notify_printer_uri->values[0].string.text, | |
302 | link_scheme, sizeof(link_scheme), | |
303 | link_username, sizeof(link_username), | |
304 | link_host, sizeof(link_host), &link_port, | |
305 | link_resource, sizeof(link_resource)); | |
306 | httpAssembleURI(HTTP_URI_CODING_ALL, link_url, sizeof(link_url), | |
307 | "http", link_username, link_host, link_port, | |
308 | link_resource); | |
309 | } | |
310 | ||
311 | msg = new_message(notify_sequence_number->values[0].integer, | |
312 | xml_escape(subject), xml_escape(text), | |
313 | notify_printer_uri ? xml_escape(link_url) : NULL, | |
314 | printer_up_time->values[0].integer); | |
315 | ||
316 | if (!msg) | |
317 | { | |
318 | fprintf(stderr, "ERROR: Unable to create message: %s\n", | |
319 | strerror(errno)); | |
320 | ||
321 | ippDelete(event); | |
322 | ||
323 | if (http) | |
324 | unlink(filename); | |
325 | ||
326 | httpClose(http); | |
327 | ||
328 | return (1); | |
329 | } | |
330 | ||
331 | /* | |
332 | * Add it to the array... | |
333 | */ | |
334 | ||
335 | cupsArrayAdd(rss, msg); | |
336 | ||
337 | /* | |
338 | * Trim the array as needed... | |
339 | */ | |
340 | ||
341 | while (cupsArrayCount(rss) > max_events) | |
342 | { | |
343 | msg = cupsArrayFirst(rss); | |
344 | ||
345 | cupsArrayRemove(rss, msg); | |
346 | ||
347 | delete_message(msg); | |
348 | } | |
349 | ||
350 | /* | |
351 | * Save the messages to the file again, uploading as needed... | |
352 | */ | |
353 | ||
354 | if (save_rss(rss, newname, baseurl)) | |
355 | { | |
356 | if (http) | |
357 | { | |
358 | /* | |
359 | * Upload the RSS file... | |
360 | */ | |
361 | ||
362 | if ((status = cupsPutFile(http, resource, filename)) != HTTP_CREATED) | |
363 | fprintf(stderr, "ERROR: Unable to PUT %s from %s on port %d: %d %s\n", | |
364 | resource, host, port, status, httpStatus(status)); | |
365 | } | |
366 | else | |
367 | { | |
368 | /* | |
369 | * Move the new RSS file over top the old one... | |
370 | */ | |
371 | ||
372 | if (rename(newname, filename)) | |
373 | fprintf(stderr, "ERROR: Unable to rename %s to %s: %s\n", | |
374 | newname, filename, strerror(errno)); | |
375 | } | |
376 | } | |
377 | } | |
378 | ||
379 | if (subject) | |
380 | free(subject); | |
381 | ||
382 | if (text) | |
383 | free(text); | |
384 | ||
385 | ippDelete(event); | |
386 | } | |
387 | } | |
388 | ||
389 | ||
390 | /* | |
391 | * 'compare_rss()' - Compare two messages. | |
392 | */ | |
393 | ||
394 | static int /* O - Result of comparison */ | |
395 | compare_rss(_cups_rss_t *a, /* I - First message */ | |
396 | _cups_rss_t *b) /* I - Second message */ | |
397 | { | |
398 | return (a->sequence_number - b->sequence_number); | |
399 | } | |
400 | ||
401 | ||
402 | /* | |
403 | * 'delete_message()' - Free all memory used by a message. | |
404 | */ | |
405 | ||
406 | static void | |
407 | delete_message(_cups_rss_t *msg) /* I - RSS message */ | |
408 | { | |
409 | if (msg->subject) | |
410 | free(msg->subject); | |
411 | ||
412 | if (msg->text) | |
413 | free(msg->text); | |
414 | ||
415 | if (msg->link_url) | |
416 | free(msg->link_url); | |
417 | ||
418 | free(msg); | |
419 | } | |
420 | ||
421 | ||
422 | /* | |
423 | * 'load_rss()' - Load an existing RSS feed file. | |
424 | */ | |
425 | ||
426 | static void | |
427 | load_rss(cups_array_t *rss, /* I - RSS messages */ | |
428 | const char *filename) /* I - File to load */ | |
429 | { | |
430 | FILE *fp; /* File pointer */ | |
431 | char line[4096], /* Line from file */ | |
432 | *subject, /* Subject */ | |
433 | *text, /* Text */ | |
434 | *link_url, /* Link URL */ | |
435 | *start, /* Start of element */ | |
436 | *end; /* End of element */ | |
437 | time_t event_time; /* Event time */ | |
438 | int sequence_number; /* Sequence number */ | |
439 | int in_item; /* In an item */ | |
440 | _cups_rss_t *msg; /* New message */ | |
441 | ||
442 | ||
443 | if ((fp = fopen(filename, "r")) == NULL) | |
444 | { | |
445 | if (errno != ENOENT) | |
446 | fprintf(stderr, "ERROR: Unable to open %s: %s\n", filename, | |
447 | strerror(errno)); | |
448 | ||
449 | return; | |
450 | } | |
451 | ||
452 | subject = NULL; | |
453 | text = NULL; | |
454 | link_url = NULL; | |
455 | event_time = 0; | |
456 | sequence_number = 0; | |
457 | in_item = 0; | |
458 | ||
459 | while (fgets(line, sizeof(line), fp)) | |
460 | { | |
461 | if (strstr(line, "<item>")) | |
462 | in_item = 1; | |
463 | else if (strstr(line, "</item>") && in_item) | |
464 | { | |
465 | if (subject && text) | |
466 | { | |
467 | msg = new_message(sequence_number, subject, text, link_url, | |
468 | event_time); | |
469 | ||
470 | if (msg) | |
471 | cupsArrayAdd(rss, msg); | |
472 | ||
473 | } | |
474 | else | |
475 | { | |
476 | if (subject) | |
477 | free(subject); | |
478 | ||
479 | if (text) | |
480 | free(text); | |
481 | ||
482 | if (link_url) | |
483 | free(link_url); | |
484 | } | |
485 | ||
486 | subject = NULL; | |
487 | text = NULL; | |
488 | link_url = NULL; | |
489 | event_time = 0; | |
490 | sequence_number = 0; | |
491 | in_item = 0; | |
492 | } | |
493 | else if (!in_item) | |
494 | continue; | |
495 | else if ((start = strstr(line, "<title>")) != NULL) | |
496 | { | |
497 | start += 7; | |
498 | if ((end = strstr(start, "</title>")) != NULL) | |
499 | { | |
500 | *end = '\0'; | |
501 | subject = strdup(start); | |
502 | } | |
503 | } | |
504 | else if ((start = strstr(line, "<description>")) != NULL) | |
505 | { | |
506 | start += 13; | |
507 | if ((end = strstr(start, "</description>")) != NULL) | |
508 | { | |
509 | *end = '\0'; | |
510 | text = strdup(start); | |
511 | } | |
512 | } | |
513 | else if ((start = strstr(line, "<link>")) != NULL) | |
514 | { | |
515 | start += 6; | |
516 | if ((end = strstr(start, "</link>")) != NULL) | |
517 | { | |
518 | *end = '\0'; | |
519 | link_url = strdup(start); | |
520 | } | |
521 | } | |
522 | else if ((start = strstr(line, "<pubDate>")) != NULL) | |
523 | { | |
524 | start += 9; | |
525 | if ((end = strstr(start, "</pubDate>")) != NULL) | |
526 | { | |
527 | *end = '\0'; | |
528 | event_time = httpGetDateTime(start); | |
529 | } | |
530 | } | |
531 | else if ((start = strstr(line, "<guid>")) != NULL) | |
532 | sequence_number = atoi(start + 6); | |
533 | } | |
534 | ||
535 | fclose(fp); | |
536 | } | |
537 | ||
538 | ||
539 | /* | |
540 | * 'new_message()' - Create a new RSS message. | |
541 | */ | |
542 | ||
543 | static _cups_rss_t * /* O - New message */ | |
544 | new_message(int sequence_number, /* I - notify-sequence-number */ | |
545 | char *subject, /* I - Subject/summary */ | |
546 | char *text, /* I - Text */ | |
547 | char *link_url, /* I - Link to printer */ | |
548 | time_t event_time) /* I - Date/time of event */ | |
549 | { | |
550 | _cups_rss_t *msg; /* New message */ | |
551 | ||
552 | ||
553 | if ((msg = calloc(1, sizeof(_cups_rss_t))) == NULL) | |
554 | return (NULL); | |
555 | ||
556 | msg->sequence_number = sequence_number; | |
557 | msg->subject = subject; | |
558 | msg->text = text; | |
559 | msg->link_url = link_url; | |
560 | msg->event_time = event_time; | |
561 | ||
562 | return (msg); | |
563 | } | |
564 | ||
565 | ||
566 | /* | |
567 | * 'password_cb()' - Return the cached password. | |
568 | */ | |
569 | ||
570 | static const char * /* O - Cached password */ | |
571 | password_cb(const char *prompt) /* I - Prompt string, unused */ | |
572 | { | |
573 | (void)prompt; | |
574 | ||
575 | return (rss_password); | |
576 | } | |
577 | ||
578 | ||
579 | /* | |
580 | * 'save_rss()' - Save messages to a RSS file. | |
581 | */ | |
582 | ||
583 | static int /* O - 1 on success, 0 on failure */ | |
584 | save_rss(cups_array_t *rss, /* I - RSS messages */ | |
585 | const char *filename, /* I - File to save to */ | |
586 | const char *baseurl) /* I - Base URL */ | |
587 | { | |
588 | FILE *fp; /* File pointer */ | |
589 | _cups_rss_t *msg; /* Current message */ | |
590 | char date[1024]; /* Current date */ | |
591 | ||
592 | ||
593 | if ((fp = fopen(filename, "w")) == NULL) | |
594 | { | |
595 | fprintf(stderr, "ERROR: Unable to create %s: %s\n", filename, | |
596 | strerror(errno)); | |
597 | return (0); | |
598 | } | |
599 | ||
600 | fputs("<?xml version=\"1.0\"?>\n", fp); | |
601 | fputs("<rss version=\"2.0\">\n", fp); | |
602 | fputs(" <channel>\n", fp); | |
603 | fputs(" <title>CUPS RSS Feed</title>\n", fp); | |
604 | fprintf(fp, " <link>%s</link>\n", baseurl); | |
09a101d6 | 605 | fputs(" <description>CUPS RSS Feed</description>\n", fp); |
f7deaa1a | 606 | fputs(" <generator>" CUPS_SVERSION "</generator>\n", fp); |
607 | fputs(" <ttl>1</ttl>\n", fp); | |
608 | ||
609 | fprintf(fp, " <pubDate>%s</pubDate>\n", | |
610 | httpGetDateString2(time(NULL), date, sizeof(date))); | |
611 | ||
612 | for (msg = (_cups_rss_t *)cupsArrayLast(rss); | |
613 | msg; | |
614 | msg = (_cups_rss_t *)cupsArrayPrev(rss)) | |
615 | { | |
616 | fputs(" <item>\n", fp); | |
617 | fprintf(fp, " <title>%s</title>\n", msg->subject); | |
618 | fprintf(fp, " <description>%s</description>\n", msg->text); | |
619 | if (msg->link_url) | |
620 | fprintf(fp, " <link>%s</link>\n", msg->link_url); | |
621 | fprintf(fp, " <pubDate>%s</pubDate>\n", | |
622 | httpGetDateString2(msg->event_time, date, sizeof(date))); | |
623 | fprintf(fp, " <guid>%d</guid>\n", msg->sequence_number); | |
624 | fputs(" </item>\n", fp); | |
625 | } | |
626 | ||
627 | fputs(" </channel>\n", fp); | |
628 | fputs("</rss>\n", fp); | |
629 | ||
630 | return (!fclose(fp)); | |
631 | } | |
632 | ||
633 | ||
634 | /* | |
635 | * 'xml_escape()' - Copy a string, escaping &, <, and > as needed. | |
636 | */ | |
637 | ||
638 | static char * /* O - Escaped string */ | |
639 | xml_escape(const char *s) /* I - String to escape */ | |
640 | { | |
641 | char *e, /* Escaped string */ | |
642 | *eptr; /* Pointer into escaped string */ | |
643 | const char *sptr; /* Pointer into string */ | |
644 | size_t bytes; /* Bytes needed for string */ | |
645 | ||
646 | ||
647 | /* | |
648 | * First figure out how many extra bytes we need... | |
649 | */ | |
650 | ||
651 | for (bytes = 0, sptr = s; *sptr; sptr ++) | |
652 | if (*sptr == '&') | |
653 | bytes += 4; /* & */ | |
654 | else if (*sptr == '<' || *sptr == '>') | |
655 | bytes += 3; /* < and > */ | |
656 | ||
657 | /* | |
658 | * If there is nothing to escape, just strdup() it... | |
659 | */ | |
660 | ||
661 | if (bytes == 0) | |
662 | return (strdup(s)); | |
663 | ||
664 | /* | |
665 | * Otherwise allocate memory and copy... | |
666 | */ | |
667 | ||
668 | if ((e = malloc(bytes + 1 + strlen(s))) == NULL) | |
669 | return (NULL); | |
670 | ||
671 | for (eptr = e, sptr = s; *sptr; sptr ++) | |
672 | if (*sptr == '&') | |
673 | { | |
674 | *eptr++ = '&'; | |
675 | *eptr++ = 'a'; | |
676 | *eptr++ = 'm'; | |
677 | *eptr++ = 'p'; | |
678 | *eptr++ = ';'; | |
679 | } | |
680 | else if (*sptr == '<') | |
681 | { | |
682 | *eptr++ = '&'; | |
683 | *eptr++ = 'l'; | |
684 | *eptr++ = 't'; | |
685 | *eptr++ = ';'; | |
686 | } | |
687 | else if (*sptr == '>') | |
688 | { | |
689 | *eptr++ = '&'; | |
690 | *eptr++ = 'g'; | |
691 | *eptr++ = 't'; | |
692 | *eptr++ = ';'; | |
693 | } | |
694 | else | |
695 | *eptr++ = *sptr; | |
696 | ||
697 | *eptr = '\0'; | |
698 | ||
699 | return (e); | |
700 | } | |
701 | ||
702 | ||
703 | /* | |
09a101d6 | 704 | * End of "$Id: rss.c 6596 2007-06-21 22:42:25Z mike $". |
f7deaa1a | 705 | */ |