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Commit | Line | Data |
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1 | /* | |
2 | * File functions for CUPS. | |
3 | * | |
4 | * Since stdio files max out at 256 files on many systems, we have to | |
5 | * write similar functions without this limit. At the same time, using | |
6 | * our own file functions allows us to provide transparent support of | |
7 | * different line endings, gzip'd print files, PPD files, etc. | |
8 | * | |
9 | * Copyright 2007-2017 by Apple Inc. | |
10 | * Copyright 1997-2007 by Easy Software Products, all rights reserved. | |
11 | * | |
12 | * Licensed under Apache License v2.0. See the file "LICENSE" for more information. | |
13 | */ | |
14 | ||
15 | /* | |
16 | * Include necessary headers... | |
17 | */ | |
18 | ||
19 | #include "file-private.h" | |
20 | #include <sys/stat.h> | |
21 | #include <sys/types.h> | |
22 | ||
23 | ||
24 | /* | |
25 | * Local functions... | |
26 | */ | |
27 | ||
28 | #ifdef HAVE_LIBZ | |
29 | static ssize_t cups_compress(cups_file_t *fp, const char *buf, size_t bytes); | |
30 | #endif /* HAVE_LIBZ */ | |
31 | static ssize_t cups_fill(cups_file_t *fp); | |
32 | static int cups_open(const char *filename, int mode); | |
33 | static ssize_t cups_read(cups_file_t *fp, char *buf, size_t bytes); | |
34 | static ssize_t cups_write(cups_file_t *fp, const char *buf, size_t bytes); | |
35 | ||
36 | ||
37 | #ifndef WIN32 | |
38 | /* | |
39 | * '_cupsFileCheck()' - Check the permissions of the given filename. | |
40 | */ | |
41 | ||
42 | _cups_fc_result_t /* O - Check result */ | |
43 | _cupsFileCheck( | |
44 | const char *filename, /* I - Filename to check */ | |
45 | _cups_fc_filetype_t filetype, /* I - Type of file checks? */ | |
46 | int dorootchecks, /* I - Check for root permissions? */ | |
47 | _cups_fc_func_t cb, /* I - Callback function */ | |
48 | void *context) /* I - Context pointer for callback */ | |
49 | ||
50 | { | |
51 | struct stat fileinfo; /* File information */ | |
52 | char message[1024], /* Message string */ | |
53 | temp[1024], /* Parent directory filename */ | |
54 | *ptr; /* Pointer into parent directory */ | |
55 | _cups_fc_result_t result; /* Check result */ | |
56 | ||
57 | ||
58 | /* | |
59 | * Does the filename contain a relative path ("../")? | |
60 | */ | |
61 | ||
62 | if (strstr(filename, "../")) | |
63 | { | |
64 | /* | |
65 | * Yes, fail it! | |
66 | */ | |
67 | ||
68 | result = _CUPS_FILE_CHECK_RELATIVE_PATH; | |
69 | goto finishup; | |
70 | } | |
71 | ||
72 | /* | |
73 | * Does the program even exist and is it accessible? | |
74 | */ | |
75 | ||
76 | if (stat(filename, &fileinfo)) | |
77 | { | |
78 | /* | |
79 | * Nope... | |
80 | */ | |
81 | ||
82 | result = _CUPS_FILE_CHECK_MISSING; | |
83 | goto finishup; | |
84 | } | |
85 | ||
86 | /* | |
87 | * Check the execute bit... | |
88 | */ | |
89 | ||
90 | result = _CUPS_FILE_CHECK_OK; | |
91 | ||
92 | switch (filetype) | |
93 | { | |
94 | case _CUPS_FILE_CHECK_DIRECTORY : | |
95 | if (!S_ISDIR(fileinfo.st_mode)) | |
96 | result = _CUPS_FILE_CHECK_WRONG_TYPE; | |
97 | break; | |
98 | ||
99 | default : | |
100 | if (!S_ISREG(fileinfo.st_mode)) | |
101 | result = _CUPS_FILE_CHECK_WRONG_TYPE; | |
102 | break; | |
103 | } | |
104 | ||
105 | if (result) | |
106 | goto finishup; | |
107 | ||
108 | /* | |
109 | * Are we doing root checks? | |
110 | */ | |
111 | ||
112 | if (!dorootchecks) | |
113 | { | |
114 | /* | |
115 | * Nope, so anything (else) goes... | |
116 | */ | |
117 | ||
118 | goto finishup; | |
119 | } | |
120 | ||
121 | /* | |
122 | * Verify permission of the file itself: | |
123 | * | |
124 | * 1. Must be owned by root | |
125 | * 2. Must not be writable by group | |
126 | * 3. Must not be setuid | |
127 | * 4. Must not be writable by others | |
128 | */ | |
129 | ||
130 | if (fileinfo.st_uid || /* 1. Must be owned by root */ | |
131 | (fileinfo.st_mode & S_IWGRP) || /* 2. Must not be writable by group */ | |
132 | (fileinfo.st_mode & S_ISUID) || /* 3. Must not be setuid */ | |
133 | (fileinfo.st_mode & S_IWOTH)) /* 4. Must not be writable by others */ | |
134 | { | |
135 | result = _CUPS_FILE_CHECK_PERMISSIONS; | |
136 | goto finishup; | |
137 | } | |
138 | ||
139 | if (filetype == _CUPS_FILE_CHECK_DIRECTORY || | |
140 | filetype == _CUPS_FILE_CHECK_FILE_ONLY) | |
141 | goto finishup; | |
142 | ||
143 | /* | |
144 | * Now check the containing directory... | |
145 | */ | |
146 | ||
147 | strlcpy(temp, filename, sizeof(temp)); | |
148 | if ((ptr = strrchr(temp, '/')) != NULL) | |
149 | { | |
150 | if (ptr == temp) | |
151 | ptr[1] = '\0'; | |
152 | else | |
153 | *ptr = '\0'; | |
154 | } | |
155 | ||
156 | if (stat(temp, &fileinfo)) | |
157 | { | |
158 | /* | |
159 | * Doesn't exist?!? | |
160 | */ | |
161 | ||
162 | result = _CUPS_FILE_CHECK_MISSING; | |
163 | filetype = _CUPS_FILE_CHECK_DIRECTORY; | |
164 | filename = temp; | |
165 | ||
166 | goto finishup; | |
167 | } | |
168 | ||
169 | if (fileinfo.st_uid || /* 1. Must be owned by root */ | |
170 | (fileinfo.st_mode & S_IWGRP) || /* 2. Must not be writable by group */ | |
171 | (fileinfo.st_mode & S_ISUID) || /* 3. Must not be setuid */ | |
172 | (fileinfo.st_mode & S_IWOTH)) /* 4. Must not be writable by others */ | |
173 | { | |
174 | result = _CUPS_FILE_CHECK_PERMISSIONS; | |
175 | filetype = _CUPS_FILE_CHECK_DIRECTORY; | |
176 | filename = temp; | |
177 | } | |
178 | ||
179 | /* | |
180 | * Common return point... | |
181 | */ | |
182 | ||
183 | finishup: | |
184 | ||
185 | if (cb) | |
186 | { | |
187 | cups_lang_t *lang = cupsLangDefault(); | |
188 | /* Localization information */ | |
189 | ||
190 | switch (result) | |
191 | { | |
192 | case _CUPS_FILE_CHECK_OK : | |
193 | if (filetype == _CUPS_FILE_CHECK_DIRECTORY) | |
194 | snprintf(message, sizeof(message), | |
195 | _cupsLangString(lang, _("Directory \"%s\" permissions OK " | |
196 | "(0%o/uid=%d/gid=%d).")), | |
197 | filename, fileinfo.st_mode, (int)fileinfo.st_uid, | |
198 | (int)fileinfo.st_gid); | |
199 | else | |
200 | snprintf(message, sizeof(message), | |
201 | _cupsLangString(lang, _("File \"%s\" permissions OK " | |
202 | "(0%o/uid=%d/gid=%d).")), | |
203 | filename, fileinfo.st_mode, (int)fileinfo.st_uid, | |
204 | (int)fileinfo.st_gid); | |
205 | break; | |
206 | ||
207 | case _CUPS_FILE_CHECK_MISSING : | |
208 | if (filetype == _CUPS_FILE_CHECK_DIRECTORY) | |
209 | snprintf(message, sizeof(message), | |
210 | _cupsLangString(lang, _("Directory \"%s\" not available: " | |
211 | "%s")), | |
212 | filename, strerror(errno)); | |
213 | else | |
214 | snprintf(message, sizeof(message), | |
215 | _cupsLangString(lang, _("File \"%s\" not available: %s")), | |
216 | filename, strerror(errno)); | |
217 | break; | |
218 | ||
219 | case _CUPS_FILE_CHECK_PERMISSIONS : | |
220 | if (filetype == _CUPS_FILE_CHECK_DIRECTORY) | |
221 | snprintf(message, sizeof(message), | |
222 | _cupsLangString(lang, _("Directory \"%s\" has insecure " | |
223 | "permissions " | |
224 | "(0%o/uid=%d/gid=%d).")), | |
225 | filename, fileinfo.st_mode, (int)fileinfo.st_uid, | |
226 | (int)fileinfo.st_gid); | |
227 | else | |
228 | snprintf(message, sizeof(message), | |
229 | _cupsLangString(lang, _("File \"%s\" has insecure " | |
230 | "permissions " | |
231 | "(0%o/uid=%d/gid=%d).")), | |
232 | filename, fileinfo.st_mode, (int)fileinfo.st_uid, | |
233 | (int)fileinfo.st_gid); | |
234 | break; | |
235 | ||
236 | case _CUPS_FILE_CHECK_WRONG_TYPE : | |
237 | if (filetype == _CUPS_FILE_CHECK_DIRECTORY) | |
238 | snprintf(message, sizeof(message), | |
239 | _cupsLangString(lang, _("Directory \"%s\" is a file.")), | |
240 | filename); | |
241 | else | |
242 | snprintf(message, sizeof(message), | |
243 | _cupsLangString(lang, _("File \"%s\" is a directory.")), | |
244 | filename); | |
245 | break; | |
246 | ||
247 | case _CUPS_FILE_CHECK_RELATIVE_PATH : | |
248 | if (filetype == _CUPS_FILE_CHECK_DIRECTORY) | |
249 | snprintf(message, sizeof(message), | |
250 | _cupsLangString(lang, _("Directory \"%s\" contains a " | |
251 | "relative path.")), filename); | |
252 | else | |
253 | snprintf(message, sizeof(message), | |
254 | _cupsLangString(lang, _("File \"%s\" contains a relative " | |
255 | "path.")), filename); | |
256 | break; | |
257 | } | |
258 | ||
259 | (*cb)(context, result, message); | |
260 | } | |
261 | ||
262 | return (result); | |
263 | } | |
264 | ||
265 | ||
266 | /* | |
267 | * '_cupsFileCheckFilter()' - Report file check results as CUPS filter messages. | |
268 | */ | |
269 | ||
270 | void | |
271 | _cupsFileCheckFilter( | |
272 | void *context, /* I - Context pointer (unused) */ | |
273 | _cups_fc_result_t result, /* I - Result code */ | |
274 | const char *message) /* I - Message text */ | |
275 | { | |
276 | const char *prefix; /* Messaging prefix */ | |
277 | ||
278 | ||
279 | (void)context; | |
280 | ||
281 | switch (result) | |
282 | { | |
283 | default : | |
284 | case _CUPS_FILE_CHECK_OK : | |
285 | prefix = "DEBUG2"; | |
286 | break; | |
287 | ||
288 | case _CUPS_FILE_CHECK_MISSING : | |
289 | case _CUPS_FILE_CHECK_WRONG_TYPE : | |
290 | prefix = "ERROR"; | |
291 | fputs("STATE: +cups-missing-filter-warning\n", stderr); | |
292 | break; | |
293 | ||
294 | case _CUPS_FILE_CHECK_PERMISSIONS : | |
295 | case _CUPS_FILE_CHECK_RELATIVE_PATH : | |
296 | prefix = "ERROR"; | |
297 | fputs("STATE: +cups-insecure-filter-warning\n", stderr); | |
298 | break; | |
299 | } | |
300 | ||
301 | fprintf(stderr, "%s: %s\n", prefix, message); | |
302 | } | |
303 | #endif /* !WIN32 */ | |
304 | ||
305 | ||
306 | /* | |
307 | * 'cupsFileClose()' - Close a CUPS file. | |
308 | * | |
309 | * @since CUPS 1.2/macOS 10.5@ | |
310 | */ | |
311 | ||
312 | int /* O - 0 on success, -1 on error */ | |
313 | cupsFileClose(cups_file_t *fp) /* I - CUPS file */ | |
314 | { | |
315 | int fd; /* File descriptor */ | |
316 | char mode; /* Open mode */ | |
317 | int status; /* Return status */ | |
318 | ||
319 | ||
320 | DEBUG_printf(("cupsFileClose(fp=%p)", (void *)fp)); | |
321 | ||
322 | /* | |
323 | * Range check... | |
324 | */ | |
325 | ||
326 | if (!fp) | |
327 | return (-1); | |
328 | ||
329 | /* | |
330 | * Flush pending write data... | |
331 | */ | |
332 | ||
333 | if (fp->mode == 'w') | |
334 | status = cupsFileFlush(fp); | |
335 | else | |
336 | status = 0; | |
337 | ||
338 | #ifdef HAVE_LIBZ | |
339 | if (fp->compressed && status >= 0) | |
340 | { | |
341 | if (fp->mode == 'r') | |
342 | { | |
343 | /* | |
344 | * Free decompression data... | |
345 | */ | |
346 | ||
347 | inflateEnd(&fp->stream); | |
348 | } | |
349 | else | |
350 | { | |
351 | /* | |
352 | * Flush any remaining compressed data... | |
353 | */ | |
354 | ||
355 | unsigned char trailer[8]; /* Trailer CRC and length */ | |
356 | int done; /* Done writing... */ | |
357 | ||
358 | ||
359 | fp->stream.avail_in = 0; | |
360 | ||
361 | for (done = 0;;) | |
362 | { | |
363 | if (fp->stream.next_out > fp->cbuf) | |
364 | { | |
365 | if (cups_write(fp, (char *)fp->cbuf, | |
366 | (size_t)(fp->stream.next_out - fp->cbuf)) < 0) | |
367 | status = -1; | |
368 | ||
369 | fp->stream.next_out = fp->cbuf; | |
370 | fp->stream.avail_out = sizeof(fp->cbuf); | |
371 | } | |
372 | ||
373 | if (done || status < 0) | |
374 | break; | |
375 | ||
376 | done = deflate(&fp->stream, Z_FINISH) == Z_STREAM_END && | |
377 | fp->stream.next_out == fp->cbuf; | |
378 | } | |
379 | ||
380 | /* | |
381 | * Write the CRC and length... | |
382 | */ | |
383 | ||
384 | trailer[0] = (unsigned char)fp->crc; | |
385 | trailer[1] = (unsigned char)(fp->crc >> 8); | |
386 | trailer[2] = (unsigned char)(fp->crc >> 16); | |
387 | trailer[3] = (unsigned char)(fp->crc >> 24); | |
388 | trailer[4] = (unsigned char)fp->pos; | |
389 | trailer[5] = (unsigned char)(fp->pos >> 8); | |
390 | trailer[6] = (unsigned char)(fp->pos >> 16); | |
391 | trailer[7] = (unsigned char)(fp->pos >> 24); | |
392 | ||
393 | if (cups_write(fp, (char *)trailer, 8) < 0) | |
394 | status = -1; | |
395 | ||
396 | /* | |
397 | * Free all memory used by the compression stream... | |
398 | */ | |
399 | ||
400 | deflateEnd(&(fp->stream)); | |
401 | } | |
402 | } | |
403 | #endif /* HAVE_LIBZ */ | |
404 | ||
405 | /* | |
406 | * If this is one of the cupsFileStdin/out/err files, return now and don't | |
407 | * actually free memory or close (these last the life of the process...) | |
408 | */ | |
409 | ||
410 | if (fp->is_stdio) | |
411 | return (status); | |
412 | ||
413 | /* | |
414 | * Save the file descriptor we used and free memory... | |
415 | */ | |
416 | ||
417 | fd = fp->fd; | |
418 | mode = fp->mode; | |
419 | ||
420 | if (fp->printf_buffer) | |
421 | free(fp->printf_buffer); | |
422 | ||
423 | free(fp); | |
424 | ||
425 | /* | |
426 | * Close the file, returning the close status... | |
427 | */ | |
428 | ||
429 | if (mode == 's') | |
430 | { | |
431 | if (httpAddrClose(NULL, fd) < 0) | |
432 | status = -1; | |
433 | } | |
434 | else if (close(fd) < 0) | |
435 | status = -1; | |
436 | ||
437 | return (status); | |
438 | } | |
439 | ||
440 | ||
441 | /* | |
442 | * 'cupsFileCompression()' - Return whether a file is compressed. | |
443 | * | |
444 | * @since CUPS 1.2/macOS 10.5@ | |
445 | */ | |
446 | ||
447 | int /* O - @code CUPS_FILE_NONE@ or @code CUPS_FILE_GZIP@ */ | |
448 | cupsFileCompression(cups_file_t *fp) /* I - CUPS file */ | |
449 | { | |
450 | return (fp ? fp->compressed : CUPS_FILE_NONE); | |
451 | } | |
452 | ||
453 | ||
454 | /* | |
455 | * 'cupsFileEOF()' - Return the end-of-file status. | |
456 | * | |
457 | * @since CUPS 1.2/macOS 10.5@ | |
458 | */ | |
459 | ||
460 | int /* O - 1 on end of file, 0 otherwise */ | |
461 | cupsFileEOF(cups_file_t *fp) /* I - CUPS file */ | |
462 | { | |
463 | return (fp ? fp->eof : 1); | |
464 | } | |
465 | ||
466 | ||
467 | /* | |
468 | * 'cupsFileFind()' - Find a file using the specified path. | |
469 | * | |
470 | * This function allows the paths in the path string to be separated by | |
471 | * colons (UNIX standard) or semicolons (Windows standard) and stores the | |
472 | * result in the buffer supplied. If the file cannot be found in any of | |
473 | * the supplied paths, @code NULL@ is returned. A @code NULL@ path only | |
474 | * matches the current directory. | |
475 | * | |
476 | * @since CUPS 1.2/macOS 10.5@ | |
477 | */ | |
478 | ||
479 | const char * /* O - Full path to file or @code NULL@ if not found */ | |
480 | cupsFileFind(const char *filename, /* I - File to find */ | |
481 | const char *path, /* I - Colon/semicolon-separated path */ | |
482 | int executable, /* I - 1 = executable files, 0 = any file/dir */ | |
483 | char *buffer, /* I - Filename buffer */ | |
484 | int bufsize) /* I - Size of filename buffer */ | |
485 | { | |
486 | char *bufptr, /* Current position in buffer */ | |
487 | *bufend; /* End of buffer */ | |
488 | ||
489 | ||
490 | /* | |
491 | * Range check input... | |
492 | */ | |
493 | ||
494 | DEBUG_printf(("cupsFileFind(filename=\"%s\", path=\"%s\", executable=%d, buffer=%p, bufsize=%d)", filename, path, executable, (void *)buffer, bufsize)); | |
495 | ||
496 | if (!filename || !buffer || bufsize < 2) | |
497 | return (NULL); | |
498 | ||
499 | if (!path) | |
500 | { | |
501 | /* | |
502 | * No path, so check current directory... | |
503 | */ | |
504 | ||
505 | if (!access(filename, 0)) | |
506 | { | |
507 | strlcpy(buffer, filename, (size_t)bufsize); | |
508 | return (buffer); | |
509 | } | |
510 | else | |
511 | return (NULL); | |
512 | } | |
513 | ||
514 | /* | |
515 | * Now check each path and return the first match... | |
516 | */ | |
517 | ||
518 | bufend = buffer + bufsize - 1; | |
519 | bufptr = buffer; | |
520 | ||
521 | while (*path) | |
522 | { | |
523 | #ifdef WIN32 | |
524 | if (*path == ';' || (*path == ':' && ((bufptr - buffer) > 1 || !isalpha(buffer[0] & 255)))) | |
525 | #else | |
526 | if (*path == ';' || *path == ':') | |
527 | #endif /* WIN32 */ | |
528 | { | |
529 | if (bufptr > buffer && bufptr[-1] != '/' && bufptr < bufend) | |
530 | *bufptr++ = '/'; | |
531 | ||
532 | strlcpy(bufptr, filename, (size_t)(bufend - bufptr)); | |
533 | ||
534 | #ifdef WIN32 | |
535 | if (!access(buffer, 0)) | |
536 | #else | |
537 | if (!access(buffer, executable ? X_OK : 0)) | |
538 | #endif /* WIN32 */ | |
539 | { | |
540 | DEBUG_printf(("1cupsFileFind: Returning \"%s\"", buffer)); | |
541 | return (buffer); | |
542 | } | |
543 | ||
544 | bufptr = buffer; | |
545 | } | |
546 | else if (bufptr < bufend) | |
547 | *bufptr++ = *path; | |
548 | ||
549 | path ++; | |
550 | } | |
551 | ||
552 | /* | |
553 | * Check the last path... | |
554 | */ | |
555 | ||
556 | if (bufptr > buffer && bufptr[-1] != '/' && bufptr < bufend) | |
557 | *bufptr++ = '/'; | |
558 | ||
559 | strlcpy(bufptr, filename, (size_t)(bufend - bufptr)); | |
560 | ||
561 | if (!access(buffer, 0)) | |
562 | { | |
563 | DEBUG_printf(("1cupsFileFind: Returning \"%s\"", buffer)); | |
564 | return (buffer); | |
565 | } | |
566 | else | |
567 | { | |
568 | DEBUG_puts("1cupsFileFind: Returning NULL"); | |
569 | return (NULL); | |
570 | } | |
571 | } | |
572 | ||
573 | ||
574 | /* | |
575 | * 'cupsFileFlush()' - Flush pending output. | |
576 | * | |
577 | * @since CUPS 1.2/macOS 10.5@ | |
578 | */ | |
579 | ||
580 | int /* O - 0 on success, -1 on error */ | |
581 | cupsFileFlush(cups_file_t *fp) /* I - CUPS file */ | |
582 | { | |
583 | ssize_t bytes; /* Bytes to write */ | |
584 | ||
585 | ||
586 | DEBUG_printf(("cupsFileFlush(fp=%p)", (void *)fp)); | |
587 | ||
588 | /* | |
589 | * Range check input... | |
590 | */ | |
591 | ||
592 | if (!fp || fp->mode != 'w') | |
593 | { | |
594 | DEBUG_puts("1cupsFileFlush: Attempt to flush a read-only file..."); | |
595 | return (-1); | |
596 | } | |
597 | ||
598 | bytes = (ssize_t)(fp->ptr - fp->buf); | |
599 | ||
600 | DEBUG_printf(("2cupsFileFlush: Flushing " CUPS_LLFMT " bytes...", | |
601 | CUPS_LLCAST bytes)); | |
602 | ||
603 | if (bytes > 0) | |
604 | { | |
605 | #ifdef HAVE_LIBZ | |
606 | if (fp->compressed) | |
607 | bytes = cups_compress(fp, fp->buf, (size_t)bytes); | |
608 | else | |
609 | #endif /* HAVE_LIBZ */ | |
610 | bytes = cups_write(fp, fp->buf, (size_t)bytes); | |
611 | ||
612 | if (bytes < 0) | |
613 | return (-1); | |
614 | ||
615 | fp->ptr = fp->buf; | |
616 | } | |
617 | ||
618 | return (0); | |
619 | } | |
620 | ||
621 | ||
622 | /* | |
623 | * 'cupsFileGetChar()' - Get a single character from a file. | |
624 | * | |
625 | * @since CUPS 1.2/macOS 10.5@ | |
626 | */ | |
627 | ||
628 | int /* O - Character or -1 on end of file */ | |
629 | cupsFileGetChar(cups_file_t *fp) /* I - CUPS file */ | |
630 | { | |
631 | /* | |
632 | * Range check input... | |
633 | */ | |
634 | ||
635 | DEBUG_printf(("4cupsFileGetChar(fp=%p)", (void *)fp)); | |
636 | ||
637 | if (!fp || (fp->mode != 'r' && fp->mode != 's')) | |
638 | { | |
639 | DEBUG_puts("5cupsFileGetChar: Bad arguments!"); | |
640 | return (-1); | |
641 | } | |
642 | ||
643 | /* | |
644 | * If the input buffer is empty, try to read more data... | |
645 | */ | |
646 | ||
647 | DEBUG_printf(("5cupsFileGetChar: fp->eof=%d, fp->ptr=%p, fp->end=%p", fp->eof, (void *)fp->ptr, (void *)fp->end)); | |
648 | ||
649 | if (fp->ptr >= fp->end) | |
650 | if (cups_fill(fp) <= 0) | |
651 | { | |
652 | DEBUG_puts("5cupsFileGetChar: Unable to fill buffer!"); | |
653 | return (-1); | |
654 | } | |
655 | ||
656 | /* | |
657 | * Return the next character in the buffer... | |
658 | */ | |
659 | ||
660 | DEBUG_printf(("5cupsFileGetChar: Returning %d...", *(fp->ptr) & 255)); | |
661 | ||
662 | fp->pos ++; | |
663 | ||
664 | DEBUG_printf(("6cupsFileGetChar: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
665 | ||
666 | return (*(fp->ptr)++ & 255); | |
667 | } | |
668 | ||
669 | ||
670 | /* | |
671 | * 'cupsFileGetConf()' - Get a line from a configuration file. | |
672 | * | |
673 | * @since CUPS 1.2/macOS 10.5@ | |
674 | */ | |
675 | ||
676 | char * /* O - Line read or @code NULL@ on end of file or error */ | |
677 | cupsFileGetConf(cups_file_t *fp, /* I - CUPS file */ | |
678 | char *buf, /* O - String buffer */ | |
679 | size_t buflen, /* I - Size of string buffer */ | |
680 | char **value, /* O - Pointer to value */ | |
681 | int *linenum) /* IO - Current line number */ | |
682 | { | |
683 | char *ptr; /* Pointer into line */ | |
684 | ||
685 | ||
686 | /* | |
687 | * Range check input... | |
688 | */ | |
689 | ||
690 | DEBUG_printf(("2cupsFileGetConf(fp=%p, buf=%p, buflen=" CUPS_LLFMT | |
691 | ", value=%p, linenum=%p)", (void *)fp, (void *)buf, CUPS_LLCAST buflen, (void *)value, (void *)linenum)); | |
692 | ||
693 | if (!fp || (fp->mode != 'r' && fp->mode != 's') || | |
694 | !buf || buflen < 2 || !value) | |
695 | { | |
696 | if (value) | |
697 | *value = NULL; | |
698 | ||
699 | return (NULL); | |
700 | } | |
701 | ||
702 | /* | |
703 | * Read the next non-comment line... | |
704 | */ | |
705 | ||
706 | *value = NULL; | |
707 | ||
708 | while (cupsFileGets(fp, buf, buflen)) | |
709 | { | |
710 | (*linenum) ++; | |
711 | ||
712 | /* | |
713 | * Strip any comments... | |
714 | */ | |
715 | ||
716 | if ((ptr = strchr(buf, '#')) != NULL) | |
717 | { | |
718 | if (ptr > buf && ptr[-1] == '\\') | |
719 | { | |
720 | // Unquote the #... | |
721 | _cups_strcpy(ptr - 1, ptr); | |
722 | } | |
723 | else | |
724 | { | |
725 | // Strip the comment and any trailing whitespace... | |
726 | while (ptr > buf) | |
727 | { | |
728 | if (!_cups_isspace(ptr[-1])) | |
729 | break; | |
730 | ||
731 | ptr --; | |
732 | } | |
733 | ||
734 | *ptr = '\0'; | |
735 | } | |
736 | } | |
737 | ||
738 | /* | |
739 | * Strip leading whitespace... | |
740 | */ | |
741 | ||
742 | for (ptr = buf; _cups_isspace(*ptr); ptr ++); | |
743 | ||
744 | if (ptr > buf) | |
745 | _cups_strcpy(buf, ptr); | |
746 | ||
747 | /* | |
748 | * See if there is anything left... | |
749 | */ | |
750 | ||
751 | if (buf[0]) | |
752 | { | |
753 | /* | |
754 | * Yes, grab any value and return... | |
755 | */ | |
756 | ||
757 | for (ptr = buf; *ptr; ptr ++) | |
758 | if (_cups_isspace(*ptr)) | |
759 | break; | |
760 | ||
761 | if (*ptr) | |
762 | { | |
763 | /* | |
764 | * Have a value, skip any other spaces... | |
765 | */ | |
766 | ||
767 | while (_cups_isspace(*ptr)) | |
768 | *ptr++ = '\0'; | |
769 | ||
770 | if (*ptr) | |
771 | *value = ptr; | |
772 | ||
773 | /* | |
774 | * Strip trailing whitespace and > for lines that begin with <... | |
775 | */ | |
776 | ||
777 | ptr += strlen(ptr) - 1; | |
778 | ||
779 | if (buf[0] == '<' && *ptr == '>') | |
780 | *ptr-- = '\0'; | |
781 | else if (buf[0] == '<' && *ptr != '>') | |
782 | { | |
783 | /* | |
784 | * Syntax error... | |
785 | */ | |
786 | ||
787 | *value = NULL; | |
788 | return (buf); | |
789 | } | |
790 | ||
791 | while (ptr > *value && _cups_isspace(*ptr)) | |
792 | *ptr-- = '\0'; | |
793 | } | |
794 | ||
795 | /* | |
796 | * Return the line... | |
797 | */ | |
798 | ||
799 | return (buf); | |
800 | } | |
801 | } | |
802 | ||
803 | return (NULL); | |
804 | } | |
805 | ||
806 | ||
807 | /* | |
808 | * 'cupsFileGetLine()' - Get a CR and/or LF-terminated line that may | |
809 | * contain binary data. | |
810 | * | |
811 | * This function differs from @link cupsFileGets@ in that the trailing CR | |
812 | * and LF are preserved, as is any binary data on the line. The buffer is | |
813 | * nul-terminated, however you should use the returned length to determine | |
814 | * the number of bytes on the line. | |
815 | * | |
816 | * @since CUPS 1.2/macOS 10.5@ | |
817 | */ | |
818 | ||
819 | size_t /* O - Number of bytes on line or 0 on end of file */ | |
820 | cupsFileGetLine(cups_file_t *fp, /* I - File to read from */ | |
821 | char *buf, /* I - Buffer */ | |
822 | size_t buflen) /* I - Size of buffer */ | |
823 | { | |
824 | int ch; /* Character from file */ | |
825 | char *ptr, /* Current position in line buffer */ | |
826 | *end; /* End of line buffer */ | |
827 | ||
828 | ||
829 | /* | |
830 | * Range check input... | |
831 | */ | |
832 | ||
833 | DEBUG_printf(("2cupsFileGetLine(fp=%p, buf=%p, buflen=" CUPS_LLFMT ")", (void *)fp, (void *)buf, CUPS_LLCAST buflen)); | |
834 | ||
835 | if (!fp || (fp->mode != 'r' && fp->mode != 's') || !buf || buflen < 3) | |
836 | return (0); | |
837 | ||
838 | /* | |
839 | * Now loop until we have a valid line... | |
840 | */ | |
841 | ||
842 | for (ptr = buf, end = buf + buflen - 2; ptr < end ;) | |
843 | { | |
844 | if (fp->ptr >= fp->end) | |
845 | if (cups_fill(fp) <= 0) | |
846 | break; | |
847 | ||
848 | *ptr++ = ch = *(fp->ptr)++; | |
849 | fp->pos ++; | |
850 | ||
851 | if (ch == '\r') | |
852 | { | |
853 | /* | |
854 | * Check for CR LF... | |
855 | */ | |
856 | ||
857 | if (fp->ptr >= fp->end) | |
858 | if (cups_fill(fp) <= 0) | |
859 | break; | |
860 | ||
861 | if (*(fp->ptr) == '\n') | |
862 | { | |
863 | *ptr++ = *(fp->ptr)++; | |
864 | fp->pos ++; | |
865 | } | |
866 | ||
867 | break; | |
868 | } | |
869 | else if (ch == '\n') | |
870 | { | |
871 | /* | |
872 | * Line feed ends a line... | |
873 | */ | |
874 | ||
875 | break; | |
876 | } | |
877 | } | |
878 | ||
879 | *ptr = '\0'; | |
880 | ||
881 | DEBUG_printf(("4cupsFileGetLine: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
882 | ||
883 | return ((size_t)(ptr - buf)); | |
884 | } | |
885 | ||
886 | ||
887 | /* | |
888 | * 'cupsFileGets()' - Get a CR and/or LF-terminated line. | |
889 | * | |
890 | * @since CUPS 1.2/macOS 10.5@ | |
891 | */ | |
892 | ||
893 | char * /* O - Line read or @code NULL@ on end of file or error */ | |
894 | cupsFileGets(cups_file_t *fp, /* I - CUPS file */ | |
895 | char *buf, /* O - String buffer */ | |
896 | size_t buflen) /* I - Size of string buffer */ | |
897 | { | |
898 | int ch; /* Character from file */ | |
899 | char *ptr, /* Current position in line buffer */ | |
900 | *end; /* End of line buffer */ | |
901 | ||
902 | ||
903 | /* | |
904 | * Range check input... | |
905 | */ | |
906 | ||
907 | DEBUG_printf(("2cupsFileGets(fp=%p, buf=%p, buflen=" CUPS_LLFMT ")", (void *)fp, (void *)buf, CUPS_LLCAST buflen)); | |
908 | ||
909 | if (!fp || (fp->mode != 'r' && fp->mode != 's') || !buf || buflen < 2) | |
910 | return (NULL); | |
911 | ||
912 | /* | |
913 | * Now loop until we have a valid line... | |
914 | */ | |
915 | ||
916 | for (ptr = buf, end = buf + buflen - 1; ptr < end ;) | |
917 | { | |
918 | if (fp->ptr >= fp->end) | |
919 | if (cups_fill(fp) <= 0) | |
920 | { | |
921 | if (ptr == buf) | |
922 | return (NULL); | |
923 | else | |
924 | break; | |
925 | } | |
926 | ||
927 | ch = *(fp->ptr)++; | |
928 | fp->pos ++; | |
929 | ||
930 | if (ch == '\r') | |
931 | { | |
932 | /* | |
933 | * Check for CR LF... | |
934 | */ | |
935 | ||
936 | if (fp->ptr >= fp->end) | |
937 | if (cups_fill(fp) <= 0) | |
938 | break; | |
939 | ||
940 | if (*(fp->ptr) == '\n') | |
941 | { | |
942 | fp->ptr ++; | |
943 | fp->pos ++; | |
944 | } | |
945 | ||
946 | break; | |
947 | } | |
948 | else if (ch == '\n') | |
949 | { | |
950 | /* | |
951 | * Line feed ends a line... | |
952 | */ | |
953 | ||
954 | break; | |
955 | } | |
956 | else | |
957 | *ptr++ = (char)ch; | |
958 | } | |
959 | ||
960 | *ptr = '\0'; | |
961 | ||
962 | DEBUG_printf(("4cupsFileGets: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
963 | ||
964 | return (buf); | |
965 | } | |
966 | ||
967 | ||
968 | /* | |
969 | * 'cupsFileLock()' - Temporarily lock access to a file. | |
970 | * | |
971 | * @since CUPS 1.2/macOS 10.5@ | |
972 | */ | |
973 | ||
974 | int /* O - 0 on success, -1 on error */ | |
975 | cupsFileLock(cups_file_t *fp, /* I - CUPS file */ | |
976 | int block) /* I - 1 to wait for the lock, 0 to fail right away */ | |
977 | { | |
978 | /* | |
979 | * Range check... | |
980 | */ | |
981 | ||
982 | if (!fp || fp->mode == 's') | |
983 | return (-1); | |
984 | ||
985 | /* | |
986 | * Try the lock... | |
987 | */ | |
988 | ||
989 | #ifdef WIN32 | |
990 | return (_locking(fp->fd, block ? _LK_LOCK : _LK_NBLCK, 0)); | |
991 | #else | |
992 | return (lockf(fp->fd, block ? F_LOCK : F_TLOCK, 0)); | |
993 | #endif /* WIN32 */ | |
994 | } | |
995 | ||
996 | ||
997 | /* | |
998 | * 'cupsFileNumber()' - Return the file descriptor associated with a CUPS file. | |
999 | * | |
1000 | * @since CUPS 1.2/macOS 10.5@ | |
1001 | */ | |
1002 | ||
1003 | int /* O - File descriptor */ | |
1004 | cupsFileNumber(cups_file_t *fp) /* I - CUPS file */ | |
1005 | { | |
1006 | if (fp) | |
1007 | return (fp->fd); | |
1008 | else | |
1009 | return (-1); | |
1010 | } | |
1011 | ||
1012 | ||
1013 | /* | |
1014 | * 'cupsFileOpen()' - Open a CUPS file. | |
1015 | * | |
1016 | * The "mode" parameter can be "r" to read, "w" to write, overwriting any | |
1017 | * existing file, "a" to append to an existing file or create a new file, | |
1018 | * or "s" to open a socket connection. | |
1019 | * | |
1020 | * When opening for writing ("w"), an optional number from 1 to 9 can be | |
1021 | * supplied which enables Flate compression of the file. Compression is | |
1022 | * not supported for the "a" (append) mode. | |
1023 | * | |
1024 | * When opening a socket connection, the filename is a string of the form | |
1025 | * "address:port" or "hostname:port". The socket will make an IPv4 or IPv6 | |
1026 | * connection as needed, generally preferring IPv6 connections when there is | |
1027 | * a choice. | |
1028 | * | |
1029 | * @since CUPS 1.2/macOS 10.5@ | |
1030 | */ | |
1031 | ||
1032 | cups_file_t * /* O - CUPS file or @code NULL@ if the file or socket cannot be opened */ | |
1033 | cupsFileOpen(const char *filename, /* I - Name of file */ | |
1034 | const char *mode) /* I - Open mode */ | |
1035 | { | |
1036 | cups_file_t *fp; /* New CUPS file */ | |
1037 | int fd; /* File descriptor */ | |
1038 | char hostname[1024], /* Hostname */ | |
1039 | *portname; /* Port "name" (number or service) */ | |
1040 | http_addrlist_t *addrlist; /* Host address list */ | |
1041 | ||
1042 | ||
1043 | DEBUG_printf(("cupsFileOpen(filename=\"%s\", mode=\"%s\")", filename, | |
1044 | mode)); | |
1045 | ||
1046 | /* | |
1047 | * Range check input... | |
1048 | */ | |
1049 | ||
1050 | if (!filename || !mode || | |
1051 | (*mode != 'r' && *mode != 'w' && *mode != 'a' && *mode != 's') || | |
1052 | (*mode == 'a' && isdigit(mode[1] & 255))) | |
1053 | return (NULL); | |
1054 | ||
1055 | /* | |
1056 | * Open the file... | |
1057 | */ | |
1058 | ||
1059 | switch (*mode) | |
1060 | { | |
1061 | case 'a' : /* Append file */ | |
1062 | fd = cups_open(filename, | |
1063 | O_RDWR | O_CREAT | O_APPEND | O_LARGEFILE | O_BINARY); | |
1064 | break; | |
1065 | ||
1066 | case 'r' : /* Read file */ | |
1067 | fd = open(filename, O_RDONLY | O_LARGEFILE | O_BINARY, 0); | |
1068 | break; | |
1069 | ||
1070 | case 'w' : /* Write file */ | |
1071 | fd = cups_open(filename, O_WRONLY | O_LARGEFILE | O_BINARY); | |
1072 | if (fd < 0 && errno == ENOENT) | |
1073 | { | |
1074 | fd = cups_open(filename, | |
1075 | O_WRONLY | O_CREAT | O_EXCL | O_LARGEFILE | O_BINARY); | |
1076 | if (fd < 0 && errno == EEXIST) | |
1077 | fd = cups_open(filename, O_WRONLY | O_LARGEFILE | O_BINARY); | |
1078 | } | |
1079 | ||
1080 | if (fd >= 0) | |
1081 | #ifdef WIN32 | |
1082 | _chsize(fd, 0); | |
1083 | #else | |
1084 | ftruncate(fd, 0); | |
1085 | #endif /* WIN32 */ | |
1086 | break; | |
1087 | ||
1088 | case 's' : /* Read/write socket */ | |
1089 | strlcpy(hostname, filename, sizeof(hostname)); | |
1090 | if ((portname = strrchr(hostname, ':')) != NULL) | |
1091 | *portname++ = '\0'; | |
1092 | else | |
1093 | return (NULL); | |
1094 | ||
1095 | /* | |
1096 | * Lookup the hostname and service... | |
1097 | */ | |
1098 | ||
1099 | if ((addrlist = httpAddrGetList(hostname, AF_UNSPEC, portname)) == NULL) | |
1100 | return (NULL); | |
1101 | ||
1102 | /* | |
1103 | * Connect to the server... | |
1104 | */ | |
1105 | ||
1106 | if (!httpAddrConnect(addrlist, &fd)) | |
1107 | { | |
1108 | httpAddrFreeList(addrlist); | |
1109 | return (NULL); | |
1110 | } | |
1111 | ||
1112 | httpAddrFreeList(addrlist); | |
1113 | break; | |
1114 | ||
1115 | default : /* Remove bogus compiler warning... */ | |
1116 | return (NULL); | |
1117 | } | |
1118 | ||
1119 | if (fd < 0) | |
1120 | return (NULL); | |
1121 | ||
1122 | /* | |
1123 | * Create the CUPS file structure... | |
1124 | */ | |
1125 | ||
1126 | if ((fp = cupsFileOpenFd(fd, mode)) == NULL) | |
1127 | { | |
1128 | if (*mode == 's') | |
1129 | httpAddrClose(NULL, fd); | |
1130 | else | |
1131 | close(fd); | |
1132 | } | |
1133 | ||
1134 | /* | |
1135 | * Return it... | |
1136 | */ | |
1137 | ||
1138 | return (fp); | |
1139 | } | |
1140 | ||
1141 | /* | |
1142 | * 'cupsFileOpenFd()' - Open a CUPS file using a file descriptor. | |
1143 | * | |
1144 | * The "mode" parameter can be "r" to read, "w" to write, "a" to append, | |
1145 | * or "s" to treat the file descriptor as a bidirectional socket connection. | |
1146 | * | |
1147 | * When opening for writing ("w"), an optional number from 1 to 9 can be | |
1148 | * supplied which enables Flate compression of the file. Compression is | |
1149 | * not supported for the "a" (append) mode. | |
1150 | * | |
1151 | * @since CUPS 1.2/macOS 10.5@ | |
1152 | */ | |
1153 | ||
1154 | cups_file_t * /* O - CUPS file or @code NULL@ if the file could not be opened */ | |
1155 | cupsFileOpenFd(int fd, /* I - File descriptor */ | |
1156 | const char *mode) /* I - Open mode */ | |
1157 | { | |
1158 | cups_file_t *fp; /* New CUPS file */ | |
1159 | ||
1160 | ||
1161 | DEBUG_printf(("cupsFileOpenFd(fd=%d, mode=\"%s\")", fd, mode)); | |
1162 | ||
1163 | /* | |
1164 | * Range check input... | |
1165 | */ | |
1166 | ||
1167 | if (fd < 0 || !mode || | |
1168 | (*mode != 'r' && *mode != 'w' && *mode != 'a' && *mode != 's') || | |
1169 | (*mode == 'a' && isdigit(mode[1] & 255))) | |
1170 | return (NULL); | |
1171 | ||
1172 | /* | |
1173 | * Allocate memory... | |
1174 | */ | |
1175 | ||
1176 | if ((fp = calloc(1, sizeof(cups_file_t))) == NULL) | |
1177 | return (NULL); | |
1178 | ||
1179 | /* | |
1180 | * Open the file... | |
1181 | */ | |
1182 | ||
1183 | fp->fd = fd; | |
1184 | ||
1185 | switch (*mode) | |
1186 | { | |
1187 | case 'a' : | |
1188 | fp->pos = lseek(fd, 0, SEEK_END); | |
1189 | ||
1190 | case 'w' : | |
1191 | fp->mode = 'w'; | |
1192 | fp->ptr = fp->buf; | |
1193 | fp->end = fp->buf + sizeof(fp->buf); | |
1194 | ||
1195 | #ifdef HAVE_LIBZ | |
1196 | if (mode[1] >= '1' && mode[1] <= '9') | |
1197 | { | |
1198 | /* | |
1199 | * Open a compressed stream, so write the standard gzip file | |
1200 | * header... | |
1201 | */ | |
1202 | ||
1203 | unsigned char header[10]; /* gzip file header */ | |
1204 | time_t curtime; /* Current time */ | |
1205 | ||
1206 | ||
1207 | curtime = time(NULL); | |
1208 | header[0] = 0x1f; | |
1209 | header[1] = 0x8b; | |
1210 | header[2] = Z_DEFLATED; | |
1211 | header[3] = 0; | |
1212 | header[4] = (unsigned char)curtime; | |
1213 | header[5] = (unsigned char)(curtime >> 8); | |
1214 | header[6] = (unsigned char)(curtime >> 16); | |
1215 | header[7] = (unsigned char)(curtime >> 24); | |
1216 | header[8] = 0; | |
1217 | header[9] = 0x03; | |
1218 | ||
1219 | cups_write(fp, (char *)header, 10); | |
1220 | ||
1221 | /* | |
1222 | * Initialize the compressor... | |
1223 | */ | |
1224 | ||
1225 | deflateInit2(&(fp->stream), mode[1] - '0', Z_DEFLATED, -15, 8, | |
1226 | Z_DEFAULT_STRATEGY); | |
1227 | ||
1228 | fp->stream.next_out = fp->cbuf; | |
1229 | fp->stream.avail_out = sizeof(fp->cbuf); | |
1230 | fp->compressed = 1; | |
1231 | fp->crc = crc32(0L, Z_NULL, 0); | |
1232 | } | |
1233 | #endif /* HAVE_LIBZ */ | |
1234 | break; | |
1235 | ||
1236 | case 'r' : | |
1237 | fp->mode = 'r'; | |
1238 | break; | |
1239 | ||
1240 | case 's' : | |
1241 | fp->mode = 's'; | |
1242 | break; | |
1243 | ||
1244 | default : /* Remove bogus compiler warning... */ | |
1245 | return (NULL); | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * Don't pass this file to child processes... | |
1250 | */ | |
1251 | ||
1252 | #ifndef WIN32 | |
1253 | fcntl(fp->fd, F_SETFD, fcntl(fp->fd, F_GETFD) | FD_CLOEXEC); | |
1254 | #endif /* !WIN32 */ | |
1255 | ||
1256 | return (fp); | |
1257 | } | |
1258 | ||
1259 | ||
1260 | /* | |
1261 | * 'cupsFilePeekChar()' - Peek at the next character from a file. | |
1262 | * | |
1263 | * @since CUPS 1.2/macOS 10.5@ | |
1264 | */ | |
1265 | ||
1266 | int /* O - Character or -1 on end of file */ | |
1267 | cupsFilePeekChar(cups_file_t *fp) /* I - CUPS file */ | |
1268 | { | |
1269 | /* | |
1270 | * Range check input... | |
1271 | */ | |
1272 | ||
1273 | if (!fp || (fp->mode != 'r' && fp->mode != 's')) | |
1274 | return (-1); | |
1275 | ||
1276 | /* | |
1277 | * If the input buffer is empty, try to read more data... | |
1278 | */ | |
1279 | ||
1280 | if (fp->ptr >= fp->end) | |
1281 | if (cups_fill(fp) <= 0) | |
1282 | return (-1); | |
1283 | ||
1284 | /* | |
1285 | * Return the next character in the buffer... | |
1286 | */ | |
1287 | ||
1288 | return (*(fp->ptr) & 255); | |
1289 | } | |
1290 | ||
1291 | ||
1292 | /* | |
1293 | * 'cupsFilePrintf()' - Write a formatted string. | |
1294 | * | |
1295 | * @since CUPS 1.2/macOS 10.5@ | |
1296 | */ | |
1297 | ||
1298 | int /* O - Number of bytes written or -1 on error */ | |
1299 | cupsFilePrintf(cups_file_t *fp, /* I - CUPS file */ | |
1300 | const char *format, /* I - Printf-style format string */ | |
1301 | ...) /* I - Additional args as necessary */ | |
1302 | { | |
1303 | va_list ap; /* Argument list */ | |
1304 | ssize_t bytes; /* Formatted size */ | |
1305 | ||
1306 | ||
1307 | DEBUG_printf(("2cupsFilePrintf(fp=%p, format=\"%s\", ...)", (void *)fp, format)); | |
1308 | ||
1309 | if (!fp || !format || (fp->mode != 'w' && fp->mode != 's')) | |
1310 | return (-1); | |
1311 | ||
1312 | if (!fp->printf_buffer) | |
1313 | { | |
1314 | /* | |
1315 | * Start with an 1k printf buffer... | |
1316 | */ | |
1317 | ||
1318 | if ((fp->printf_buffer = malloc(1024)) == NULL) | |
1319 | return (-1); | |
1320 | ||
1321 | fp->printf_size = 1024; | |
1322 | } | |
1323 | ||
1324 | va_start(ap, format); | |
1325 | bytes = vsnprintf(fp->printf_buffer, fp->printf_size, format, ap); | |
1326 | va_end(ap); | |
1327 | ||
1328 | if (bytes >= (ssize_t)fp->printf_size) | |
1329 | { | |
1330 | /* | |
1331 | * Expand the printf buffer... | |
1332 | */ | |
1333 | ||
1334 | char *temp; /* Temporary buffer pointer */ | |
1335 | ||
1336 | ||
1337 | if (bytes > 65535) | |
1338 | return (-1); | |
1339 | ||
1340 | if ((temp = realloc(fp->printf_buffer, (size_t)(bytes + 1))) == NULL) | |
1341 | return (-1); | |
1342 | ||
1343 | fp->printf_buffer = temp; | |
1344 | fp->printf_size = (size_t)(bytes + 1); | |
1345 | ||
1346 | va_start(ap, format); | |
1347 | bytes = vsnprintf(fp->printf_buffer, fp->printf_size, format, ap); | |
1348 | va_end(ap); | |
1349 | } | |
1350 | ||
1351 | if (fp->mode == 's') | |
1352 | { | |
1353 | if (cups_write(fp, fp->printf_buffer, (size_t)bytes) < 0) | |
1354 | return (-1); | |
1355 | ||
1356 | fp->pos += bytes; | |
1357 | ||
1358 | DEBUG_printf(("4cupsFilePrintf: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
1359 | ||
1360 | return ((int)bytes); | |
1361 | } | |
1362 | ||
1363 | if ((fp->ptr + bytes) > fp->end) | |
1364 | if (cupsFileFlush(fp)) | |
1365 | return (-1); | |
1366 | ||
1367 | fp->pos += bytes; | |
1368 | ||
1369 | DEBUG_printf(("4cupsFilePrintf: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
1370 | ||
1371 | if ((size_t)bytes > sizeof(fp->buf)) | |
1372 | { | |
1373 | #ifdef HAVE_LIBZ | |
1374 | if (fp->compressed) | |
1375 | return ((int)cups_compress(fp, fp->printf_buffer, (size_t)bytes)); | |
1376 | else | |
1377 | #endif /* HAVE_LIBZ */ | |
1378 | return ((int)cups_write(fp, fp->printf_buffer, (size_t)bytes)); | |
1379 | } | |
1380 | else | |
1381 | { | |
1382 | memcpy(fp->ptr, fp->printf_buffer, (size_t)bytes); | |
1383 | fp->ptr += bytes; | |
1384 | ||
1385 | if (fp->is_stdio && cupsFileFlush(fp)) | |
1386 | return (-1); | |
1387 | else | |
1388 | return ((int)bytes); | |
1389 | } | |
1390 | } | |
1391 | ||
1392 | ||
1393 | /* | |
1394 | * 'cupsFilePutChar()' - Write a character. | |
1395 | * | |
1396 | * @since CUPS 1.2/macOS 10.5@ | |
1397 | */ | |
1398 | ||
1399 | int /* O - 0 on success, -1 on error */ | |
1400 | cupsFilePutChar(cups_file_t *fp, /* I - CUPS file */ | |
1401 | int c) /* I - Character to write */ | |
1402 | { | |
1403 | /* | |
1404 | * Range check input... | |
1405 | */ | |
1406 | ||
1407 | if (!fp || (fp->mode != 'w' && fp->mode != 's')) | |
1408 | return (-1); | |
1409 | ||
1410 | if (fp->mode == 's') | |
1411 | { | |
1412 | /* | |
1413 | * Send character immediately over socket... | |
1414 | */ | |
1415 | ||
1416 | char ch; /* Output character */ | |
1417 | ||
1418 | ||
1419 | ch = (char)c; | |
1420 | ||
1421 | if (send(fp->fd, &ch, 1, 0) < 1) | |
1422 | return (-1); | |
1423 | } | |
1424 | else | |
1425 | { | |
1426 | /* | |
1427 | * Buffer it up... | |
1428 | */ | |
1429 | ||
1430 | if (fp->ptr >= fp->end) | |
1431 | if (cupsFileFlush(fp)) | |
1432 | return (-1); | |
1433 | ||
1434 | *(fp->ptr) ++ = (char)c; | |
1435 | } | |
1436 | ||
1437 | fp->pos ++; | |
1438 | ||
1439 | DEBUG_printf(("4cupsFilePutChar: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
1440 | ||
1441 | return (0); | |
1442 | } | |
1443 | ||
1444 | ||
1445 | /* | |
1446 | * 'cupsFilePutConf()' - Write a configuration line. | |
1447 | * | |
1448 | * This function handles any comment escaping of the value. | |
1449 | * | |
1450 | * @since CUPS 1.4/macOS 10.6@ | |
1451 | */ | |
1452 | ||
1453 | ssize_t /* O - Number of bytes written or -1 on error */ | |
1454 | cupsFilePutConf(cups_file_t *fp, /* I - CUPS file */ | |
1455 | const char *directive, /* I - Directive */ | |
1456 | const char *value) /* I - Value */ | |
1457 | { | |
1458 | ssize_t bytes, /* Number of bytes written */ | |
1459 | temp; /* Temporary byte count */ | |
1460 | const char *ptr; /* Pointer into value */ | |
1461 | ||
1462 | ||
1463 | if (!fp || !directive || !*directive) | |
1464 | return (-1); | |
1465 | ||
1466 | if ((bytes = cupsFilePuts(fp, directive)) < 0) | |
1467 | return (-1); | |
1468 | ||
1469 | if (cupsFilePutChar(fp, ' ') < 0) | |
1470 | return (-1); | |
1471 | bytes ++; | |
1472 | ||
1473 | if (value && *value) | |
1474 | { | |
1475 | if ((ptr = strchr(value, '#')) != NULL) | |
1476 | { | |
1477 | /* | |
1478 | * Need to quote the first # in the info string... | |
1479 | */ | |
1480 | ||
1481 | if ((temp = cupsFileWrite(fp, value, (size_t)(ptr - value))) < 0) | |
1482 | return (-1); | |
1483 | bytes += temp; | |
1484 | ||
1485 | if (cupsFilePutChar(fp, '\\') < 0) | |
1486 | return (-1); | |
1487 | bytes ++; | |
1488 | ||
1489 | if ((temp = cupsFilePuts(fp, ptr)) < 0) | |
1490 | return (-1); | |
1491 | bytes += temp; | |
1492 | } | |
1493 | else if ((temp = cupsFilePuts(fp, value)) < 0) | |
1494 | return (-1); | |
1495 | else | |
1496 | bytes += temp; | |
1497 | } | |
1498 | ||
1499 | if (cupsFilePutChar(fp, '\n') < 0) | |
1500 | return (-1); | |
1501 | else | |
1502 | return (bytes + 1); | |
1503 | } | |
1504 | ||
1505 | ||
1506 | /* | |
1507 | * 'cupsFilePuts()' - Write a string. | |
1508 | * | |
1509 | * Like the @code fputs@ function, no newline is appended to the string. | |
1510 | * | |
1511 | * @since CUPS 1.2/macOS 10.5@ | |
1512 | */ | |
1513 | ||
1514 | int /* O - Number of bytes written or -1 on error */ | |
1515 | cupsFilePuts(cups_file_t *fp, /* I - CUPS file */ | |
1516 | const char *s) /* I - String to write */ | |
1517 | { | |
1518 | ssize_t bytes; /* Bytes to write */ | |
1519 | ||
1520 | ||
1521 | /* | |
1522 | * Range check input... | |
1523 | */ | |
1524 | ||
1525 | if (!fp || !s || (fp->mode != 'w' && fp->mode != 's')) | |
1526 | return (-1); | |
1527 | ||
1528 | /* | |
1529 | * Write the string... | |
1530 | */ | |
1531 | ||
1532 | bytes = (ssize_t)strlen(s); | |
1533 | ||
1534 | if (fp->mode == 's') | |
1535 | { | |
1536 | if (cups_write(fp, s, (size_t)bytes) < 0) | |
1537 | return (-1); | |
1538 | ||
1539 | fp->pos += bytes; | |
1540 | ||
1541 | DEBUG_printf(("4cupsFilePuts: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
1542 | ||
1543 | return ((int)bytes); | |
1544 | } | |
1545 | ||
1546 | if ((fp->ptr + bytes) > fp->end) | |
1547 | if (cupsFileFlush(fp)) | |
1548 | return (-1); | |
1549 | ||
1550 | fp->pos += bytes; | |
1551 | ||
1552 | DEBUG_printf(("4cupsFilePuts: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
1553 | ||
1554 | if ((size_t)bytes > sizeof(fp->buf)) | |
1555 | { | |
1556 | #ifdef HAVE_LIBZ | |
1557 | if (fp->compressed) | |
1558 | return ((int)cups_compress(fp, s, (size_t)bytes)); | |
1559 | else | |
1560 | #endif /* HAVE_LIBZ */ | |
1561 | return ((int)cups_write(fp, s, (size_t)bytes)); | |
1562 | } | |
1563 | else | |
1564 | { | |
1565 | memcpy(fp->ptr, s, (size_t)bytes); | |
1566 | fp->ptr += bytes; | |
1567 | ||
1568 | if (fp->is_stdio && cupsFileFlush(fp)) | |
1569 | return (-1); | |
1570 | else | |
1571 | return ((int)bytes); | |
1572 | } | |
1573 | } | |
1574 | ||
1575 | ||
1576 | /* | |
1577 | * 'cupsFileRead()' - Read from a file. | |
1578 | * | |
1579 | * @since CUPS 1.2/macOS 10.5@ | |
1580 | */ | |
1581 | ||
1582 | ssize_t /* O - Number of bytes read or -1 on error */ | |
1583 | cupsFileRead(cups_file_t *fp, /* I - CUPS file */ | |
1584 | char *buf, /* O - Buffer */ | |
1585 | size_t bytes) /* I - Number of bytes to read */ | |
1586 | { | |
1587 | size_t total; /* Total bytes read */ | |
1588 | ssize_t count; /* Bytes read */ | |
1589 | ||
1590 | ||
1591 | DEBUG_printf(("2cupsFileRead(fp=%p, buf=%p, bytes=" CUPS_LLFMT ")", (void *)fp, (void *)buf, CUPS_LLCAST bytes)); | |
1592 | ||
1593 | /* | |
1594 | * Range check input... | |
1595 | */ | |
1596 | ||
1597 | if (!fp || !buf || (fp->mode != 'r' && fp->mode != 's')) | |
1598 | return (-1); | |
1599 | ||
1600 | if (bytes == 0) | |
1601 | return (0); | |
1602 | ||
1603 | /* | |
1604 | * Loop until all bytes are read... | |
1605 | */ | |
1606 | ||
1607 | total = 0; | |
1608 | while (bytes > 0) | |
1609 | { | |
1610 | if (fp->ptr >= fp->end) | |
1611 | if (cups_fill(fp) <= 0) | |
1612 | { | |
1613 | DEBUG_printf(("4cupsFileRead: cups_fill() returned -1, total=" | |
1614 | CUPS_LLFMT, CUPS_LLCAST total)); | |
1615 | ||
1616 | if (total > 0) | |
1617 | return ((ssize_t)total); | |
1618 | else | |
1619 | return (-1); | |
1620 | } | |
1621 | ||
1622 | count = (ssize_t)(fp->end - fp->ptr); | |
1623 | if (count > (ssize_t)bytes) | |
1624 | count = (ssize_t)bytes; | |
1625 | ||
1626 | memcpy(buf, fp->ptr,(size_t) count); | |
1627 | fp->ptr += count; | |
1628 | fp->pos += count; | |
1629 | ||
1630 | DEBUG_printf(("4cupsFileRead: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
1631 | ||
1632 | /* | |
1633 | * Update the counts for the last read... | |
1634 | */ | |
1635 | ||
1636 | bytes -= (size_t)count; | |
1637 | total += (size_t)count; | |
1638 | buf += count; | |
1639 | } | |
1640 | ||
1641 | /* | |
1642 | * Return the total number of bytes read... | |
1643 | */ | |
1644 | ||
1645 | DEBUG_printf(("3cupsFileRead: total=" CUPS_LLFMT, CUPS_LLCAST total)); | |
1646 | ||
1647 | return ((ssize_t)total); | |
1648 | } | |
1649 | ||
1650 | ||
1651 | /* | |
1652 | * 'cupsFileRewind()' - Set the current file position to the beginning of the | |
1653 | * file. | |
1654 | * | |
1655 | * @since CUPS 1.2/macOS 10.5@ | |
1656 | */ | |
1657 | ||
1658 | off_t /* O - New file position or -1 on error */ | |
1659 | cupsFileRewind(cups_file_t *fp) /* I - CUPS file */ | |
1660 | { | |
1661 | /* | |
1662 | * Range check input... | |
1663 | */ | |
1664 | ||
1665 | DEBUG_printf(("cupsFileRewind(fp=%p)", (void *)fp)); | |
1666 | DEBUG_printf(("2cupsFileRewind: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
1667 | ||
1668 | if (!fp || fp->mode != 'r') | |
1669 | return (-1); | |
1670 | ||
1671 | /* | |
1672 | * Handle special cases... | |
1673 | */ | |
1674 | ||
1675 | if (fp->bufpos == 0) | |
1676 | { | |
1677 | /* | |
1678 | * No seeking necessary... | |
1679 | */ | |
1680 | ||
1681 | fp->pos = 0; | |
1682 | ||
1683 | if (fp->ptr) | |
1684 | { | |
1685 | fp->ptr = fp->buf; | |
1686 | fp->eof = 0; | |
1687 | } | |
1688 | ||
1689 | DEBUG_printf(("2cupsFileRewind: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
1690 | ||
1691 | return (0); | |
1692 | } | |
1693 | ||
1694 | /* | |
1695 | * Otherwise, seek in the file and cleanup any compression buffers... | |
1696 | */ | |
1697 | ||
1698 | #ifdef HAVE_LIBZ | |
1699 | if (fp->compressed) | |
1700 | { | |
1701 | inflateEnd(&fp->stream); | |
1702 | fp->compressed = 0; | |
1703 | } | |
1704 | #endif /* HAVE_LIBZ */ | |
1705 | ||
1706 | if (lseek(fp->fd, 0, SEEK_SET)) | |
1707 | { | |
1708 | DEBUG_printf(("1cupsFileRewind: lseek failed: %s", strerror(errno))); | |
1709 | return (-1); | |
1710 | } | |
1711 | ||
1712 | fp->bufpos = 0; | |
1713 | fp->pos = 0; | |
1714 | fp->ptr = NULL; | |
1715 | fp->end = NULL; | |
1716 | fp->eof = 0; | |
1717 | ||
1718 | DEBUG_printf(("2cupsFileRewind: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
1719 | ||
1720 | return (0); | |
1721 | } | |
1722 | ||
1723 | ||
1724 | /* | |
1725 | * 'cupsFileSeek()' - Seek in a file. | |
1726 | * | |
1727 | * @since CUPS 1.2/macOS 10.5@ | |
1728 | */ | |
1729 | ||
1730 | off_t /* O - New file position or -1 on error */ | |
1731 | cupsFileSeek(cups_file_t *fp, /* I - CUPS file */ | |
1732 | off_t pos) /* I - Position in file */ | |
1733 | { | |
1734 | ssize_t bytes; /* Number bytes in buffer */ | |
1735 | ||
1736 | ||
1737 | DEBUG_printf(("cupsFileSeek(fp=%p, pos=" CUPS_LLFMT ")", (void *)fp, CUPS_LLCAST pos)); | |
1738 | DEBUG_printf(("2cupsFileSeek: fp->pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
1739 | DEBUG_printf(("2cupsFileSeek: fp->ptr=%p, fp->end=%p", (void *)fp->ptr, (void *)fp->end)); | |
1740 | ||
1741 | /* | |
1742 | * Range check input... | |
1743 | */ | |
1744 | ||
1745 | if (!fp || pos < 0 || fp->mode != 'r') | |
1746 | return (-1); | |
1747 | ||
1748 | /* | |
1749 | * Handle special cases... | |
1750 | */ | |
1751 | ||
1752 | if (pos == 0) | |
1753 | return (cupsFileRewind(fp)); | |
1754 | ||
1755 | if (fp->ptr) | |
1756 | { | |
1757 | bytes = (ssize_t)(fp->end - fp->buf); | |
1758 | ||
1759 | DEBUG_printf(("2cupsFileSeek: bytes=" CUPS_LLFMT, CUPS_LLCAST bytes)); | |
1760 | ||
1761 | if (pos >= fp->bufpos && pos < (fp->bufpos + bytes)) | |
1762 | { | |
1763 | /* | |
1764 | * No seeking necessary... | |
1765 | */ | |
1766 | ||
1767 | fp->pos = pos; | |
1768 | fp->ptr = fp->buf + pos - fp->bufpos; | |
1769 | fp->eof = 0; | |
1770 | ||
1771 | return (pos); | |
1772 | } | |
1773 | } | |
1774 | ||
1775 | #ifdef HAVE_LIBZ | |
1776 | if (!fp->compressed && !fp->ptr) | |
1777 | { | |
1778 | /* | |
1779 | * Preload a buffer to determine whether the file is compressed... | |
1780 | */ | |
1781 | ||
1782 | if (cups_fill(fp) <= 0) | |
1783 | return (-1); | |
1784 | } | |
1785 | #endif /* HAVE_LIBZ */ | |
1786 | ||
1787 | /* | |
1788 | * Seek forwards or backwards... | |
1789 | */ | |
1790 | ||
1791 | fp->eof = 0; | |
1792 | ||
1793 | if (pos < fp->bufpos) | |
1794 | { | |
1795 | /* | |
1796 | * Need to seek backwards... | |
1797 | */ | |
1798 | ||
1799 | DEBUG_puts("2cupsFileSeek: SEEK BACKWARDS"); | |
1800 | ||
1801 | #ifdef HAVE_LIBZ | |
1802 | if (fp->compressed) | |
1803 | { | |
1804 | inflateEnd(&fp->stream); | |
1805 | ||
1806 | lseek(fp->fd, 0, SEEK_SET); | |
1807 | fp->bufpos = 0; | |
1808 | fp->pos = 0; | |
1809 | fp->ptr = NULL; | |
1810 | fp->end = NULL; | |
1811 | ||
1812 | while ((bytes = cups_fill(fp)) > 0) | |
1813 | if (pos >= fp->bufpos && pos < (fp->bufpos + bytes)) | |
1814 | break; | |
1815 | ||
1816 | if (bytes <= 0) | |
1817 | return (-1); | |
1818 | ||
1819 | fp->ptr = fp->buf + pos - fp->bufpos; | |
1820 | fp->pos = pos; | |
1821 | } | |
1822 | else | |
1823 | #endif /* HAVE_LIBZ */ | |
1824 | { | |
1825 | fp->bufpos = lseek(fp->fd, pos, SEEK_SET); | |
1826 | fp->pos = fp->bufpos; | |
1827 | fp->ptr = NULL; | |
1828 | fp->end = NULL; | |
1829 | ||
1830 | DEBUG_printf(("2cupsFileSeek: lseek() returned " CUPS_LLFMT, | |
1831 | CUPS_LLCAST fp->pos)); | |
1832 | } | |
1833 | } | |
1834 | else | |
1835 | { | |
1836 | /* | |
1837 | * Need to seek forwards... | |
1838 | */ | |
1839 | ||
1840 | DEBUG_puts("2cupsFileSeek: SEEK FORWARDS"); | |
1841 | ||
1842 | #ifdef HAVE_LIBZ | |
1843 | if (fp->compressed) | |
1844 | { | |
1845 | while ((bytes = cups_fill(fp)) > 0) | |
1846 | { | |
1847 | if (pos >= fp->bufpos && pos < (fp->bufpos + bytes)) | |
1848 | break; | |
1849 | } | |
1850 | ||
1851 | if (bytes <= 0) | |
1852 | return (-1); | |
1853 | ||
1854 | fp->ptr = fp->buf + pos - fp->bufpos; | |
1855 | fp->pos = pos; | |
1856 | } | |
1857 | else | |
1858 | #endif /* HAVE_LIBZ */ | |
1859 | { | |
1860 | fp->bufpos = lseek(fp->fd, pos, SEEK_SET); | |
1861 | fp->pos = fp->bufpos; | |
1862 | fp->ptr = NULL; | |
1863 | fp->end = NULL; | |
1864 | ||
1865 | DEBUG_printf(("2cupsFileSeek: lseek() returned " CUPS_LLFMT, | |
1866 | CUPS_LLCAST fp->pos)); | |
1867 | } | |
1868 | } | |
1869 | ||
1870 | DEBUG_printf(("2cupsFileSeek: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
1871 | ||
1872 | return (fp->pos); | |
1873 | } | |
1874 | ||
1875 | ||
1876 | /* | |
1877 | * 'cupsFileStderr()' - Return a CUPS file associated with stderr. | |
1878 | * | |
1879 | * @since CUPS 1.2/macOS 10.5@ | |
1880 | */ | |
1881 | ||
1882 | cups_file_t * /* O - CUPS file */ | |
1883 | cupsFileStderr(void) | |
1884 | { | |
1885 | _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals... */ | |
1886 | ||
1887 | ||
1888 | /* | |
1889 | * Open file descriptor 2 as needed... | |
1890 | */ | |
1891 | ||
1892 | if (!cg->stdio_files[2]) | |
1893 | { | |
1894 | /* | |
1895 | * Flush any pending output on the stdio file... | |
1896 | */ | |
1897 | ||
1898 | fflush(stderr); | |
1899 | ||
1900 | /* | |
1901 | * Open file descriptor 2... | |
1902 | */ | |
1903 | ||
1904 | if ((cg->stdio_files[2] = cupsFileOpenFd(2, "w")) != NULL) | |
1905 | cg->stdio_files[2]->is_stdio = 1; | |
1906 | } | |
1907 | ||
1908 | return (cg->stdio_files[2]); | |
1909 | } | |
1910 | ||
1911 | ||
1912 | /* | |
1913 | * 'cupsFileStdin()' - Return a CUPS file associated with stdin. | |
1914 | * | |
1915 | * @since CUPS 1.2/macOS 10.5@ | |
1916 | */ | |
1917 | ||
1918 | cups_file_t * /* O - CUPS file */ | |
1919 | cupsFileStdin(void) | |
1920 | { | |
1921 | _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals... */ | |
1922 | ||
1923 | ||
1924 | /* | |
1925 | * Open file descriptor 0 as needed... | |
1926 | */ | |
1927 | ||
1928 | if (!cg->stdio_files[0]) | |
1929 | { | |
1930 | /* | |
1931 | * Open file descriptor 0... | |
1932 | */ | |
1933 | ||
1934 | if ((cg->stdio_files[0] = cupsFileOpenFd(0, "r")) != NULL) | |
1935 | cg->stdio_files[0]->is_stdio = 1; | |
1936 | } | |
1937 | ||
1938 | return (cg->stdio_files[0]); | |
1939 | } | |
1940 | ||
1941 | ||
1942 | /* | |
1943 | * 'cupsFileStdout()' - Return a CUPS file associated with stdout. | |
1944 | * | |
1945 | * @since CUPS 1.2/macOS 10.5@ | |
1946 | */ | |
1947 | ||
1948 | cups_file_t * /* O - CUPS file */ | |
1949 | cupsFileStdout(void) | |
1950 | { | |
1951 | _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals... */ | |
1952 | ||
1953 | ||
1954 | /* | |
1955 | * Open file descriptor 1 as needed... | |
1956 | */ | |
1957 | ||
1958 | if (!cg->stdio_files[1]) | |
1959 | { | |
1960 | /* | |
1961 | * Flush any pending output on the stdio file... | |
1962 | */ | |
1963 | ||
1964 | fflush(stdout); | |
1965 | ||
1966 | /* | |
1967 | * Open file descriptor 1... | |
1968 | */ | |
1969 | ||
1970 | if ((cg->stdio_files[1] = cupsFileOpenFd(1, "w")) != NULL) | |
1971 | cg->stdio_files[1]->is_stdio = 1; | |
1972 | } | |
1973 | ||
1974 | return (cg->stdio_files[1]); | |
1975 | } | |
1976 | ||
1977 | ||
1978 | /* | |
1979 | * 'cupsFileTell()' - Return the current file position. | |
1980 | * | |
1981 | * @since CUPS 1.2/macOS 10.5@ | |
1982 | */ | |
1983 | ||
1984 | off_t /* O - File position */ | |
1985 | cupsFileTell(cups_file_t *fp) /* I - CUPS file */ | |
1986 | { | |
1987 | DEBUG_printf(("2cupsFileTell(fp=%p)", (void *)fp)); | |
1988 | DEBUG_printf(("3cupsFileTell: pos=" CUPS_LLFMT, CUPS_LLCAST (fp ? fp->pos : -1))); | |
1989 | ||
1990 | return (fp ? fp->pos : 0); | |
1991 | } | |
1992 | ||
1993 | ||
1994 | /* | |
1995 | * 'cupsFileUnlock()' - Unlock access to a file. | |
1996 | * | |
1997 | * @since CUPS 1.2/macOS 10.5@ | |
1998 | */ | |
1999 | ||
2000 | int /* O - 0 on success, -1 on error */ | |
2001 | cupsFileUnlock(cups_file_t *fp) /* I - CUPS file */ | |
2002 | { | |
2003 | /* | |
2004 | * Range check... | |
2005 | */ | |
2006 | ||
2007 | DEBUG_printf(("cupsFileUnlock(fp=%p)", (void *)fp)); | |
2008 | ||
2009 | if (!fp || fp->mode == 's') | |
2010 | return (-1); | |
2011 | ||
2012 | /* | |
2013 | * Unlock... | |
2014 | */ | |
2015 | ||
2016 | #ifdef WIN32 | |
2017 | return (_locking(fp->fd, _LK_UNLCK, 0)); | |
2018 | #else | |
2019 | return (lockf(fp->fd, F_ULOCK, 0)); | |
2020 | #endif /* WIN32 */ | |
2021 | } | |
2022 | ||
2023 | ||
2024 | /* | |
2025 | * 'cupsFileWrite()' - Write to a file. | |
2026 | * | |
2027 | * @since CUPS 1.2/macOS 10.5@ | |
2028 | */ | |
2029 | ||
2030 | ssize_t /* O - Number of bytes written or -1 on error */ | |
2031 | cupsFileWrite(cups_file_t *fp, /* I - CUPS file */ | |
2032 | const char *buf, /* I - Buffer */ | |
2033 | size_t bytes) /* I - Number of bytes to write */ | |
2034 | { | |
2035 | /* | |
2036 | * Range check input... | |
2037 | */ | |
2038 | ||
2039 | DEBUG_printf(("2cupsFileWrite(fp=%p, buf=%p, bytes=" CUPS_LLFMT ")", (void *)fp, (void *)buf, CUPS_LLCAST bytes)); | |
2040 | ||
2041 | if (!fp || !buf || (fp->mode != 'w' && fp->mode != 's')) | |
2042 | return (-1); | |
2043 | ||
2044 | if (bytes == 0) | |
2045 | return (0); | |
2046 | ||
2047 | /* | |
2048 | * Write the buffer... | |
2049 | */ | |
2050 | ||
2051 | if (fp->mode == 's') | |
2052 | { | |
2053 | if (cups_write(fp, buf, bytes) < 0) | |
2054 | return (-1); | |
2055 | ||
2056 | fp->pos += (off_t)bytes; | |
2057 | ||
2058 | DEBUG_printf(("4cupsFileWrite: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
2059 | ||
2060 | return ((ssize_t)bytes); | |
2061 | } | |
2062 | ||
2063 | if ((fp->ptr + bytes) > fp->end) | |
2064 | if (cupsFileFlush(fp)) | |
2065 | return (-1); | |
2066 | ||
2067 | fp->pos += (off_t)bytes; | |
2068 | ||
2069 | DEBUG_printf(("4cupsFileWrite: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos)); | |
2070 | ||
2071 | if (bytes > sizeof(fp->buf)) | |
2072 | { | |
2073 | #ifdef HAVE_LIBZ | |
2074 | if (fp->compressed) | |
2075 | return (cups_compress(fp, buf, bytes)); | |
2076 | else | |
2077 | #endif /* HAVE_LIBZ */ | |
2078 | return (cups_write(fp, buf, bytes)); | |
2079 | } | |
2080 | else | |
2081 | { | |
2082 | memcpy(fp->ptr, buf, bytes); | |
2083 | fp->ptr += bytes; | |
2084 | return ((ssize_t)bytes); | |
2085 | } | |
2086 | } | |
2087 | ||
2088 | ||
2089 | #ifdef HAVE_LIBZ | |
2090 | /* | |
2091 | * 'cups_compress()' - Compress a buffer of data. | |
2092 | */ | |
2093 | ||
2094 | static ssize_t /* O - Number of bytes written or -1 */ | |
2095 | cups_compress(cups_file_t *fp, /* I - CUPS file */ | |
2096 | const char *buf, /* I - Buffer */ | |
2097 | size_t bytes) /* I - Number bytes */ | |
2098 | { | |
2099 | DEBUG_printf(("7cups_compress(fp=%p, buf=%p, bytes=" CUPS_LLFMT ")", (void *)fp, (void *)buf, CUPS_LLCAST bytes)); | |
2100 | ||
2101 | /* | |
2102 | * Update the CRC... | |
2103 | */ | |
2104 | ||
2105 | fp->crc = crc32(fp->crc, (const Bytef *)buf, (uInt)bytes); | |
2106 | ||
2107 | /* | |
2108 | * Deflate the bytes... | |
2109 | */ | |
2110 | ||
2111 | fp->stream.next_in = (Bytef *)buf; | |
2112 | fp->stream.avail_in = (uInt)bytes; | |
2113 | ||
2114 | while (fp->stream.avail_in > 0) | |
2115 | { | |
2116 | /* | |
2117 | * Flush the current buffer... | |
2118 | */ | |
2119 | ||
2120 | DEBUG_printf(("9cups_compress: avail_in=%d, avail_out=%d", | |
2121 | fp->stream.avail_in, fp->stream.avail_out)); | |
2122 | ||
2123 | if (fp->stream.avail_out < (uInt)(sizeof(fp->cbuf) / 8)) | |
2124 | { | |
2125 | if (cups_write(fp, (char *)fp->cbuf, (size_t)(fp->stream.next_out - fp->cbuf)) < 0) | |
2126 | return (-1); | |
2127 | ||
2128 | fp->stream.next_out = fp->cbuf; | |
2129 | fp->stream.avail_out = sizeof(fp->cbuf); | |
2130 | } | |
2131 | ||
2132 | deflate(&(fp->stream), Z_NO_FLUSH); | |
2133 | } | |
2134 | ||
2135 | return ((ssize_t)bytes); | |
2136 | } | |
2137 | #endif /* HAVE_LIBZ */ | |
2138 | ||
2139 | ||
2140 | /* | |
2141 | * 'cups_fill()' - Fill the input buffer. | |
2142 | */ | |
2143 | ||
2144 | static ssize_t /* O - Number of bytes or -1 */ | |
2145 | cups_fill(cups_file_t *fp) /* I - CUPS file */ | |
2146 | { | |
2147 | ssize_t bytes; /* Number of bytes read */ | |
2148 | #ifdef HAVE_LIBZ | |
2149 | int status; /* Decompression status */ | |
2150 | const unsigned char *ptr, /* Pointer into buffer */ | |
2151 | *end; /* End of buffer */ | |
2152 | #endif /* HAVE_LIBZ */ | |
2153 | ||
2154 | ||
2155 | DEBUG_printf(("7cups_fill(fp=%p)", (void *)fp)); | |
2156 | DEBUG_printf(("9cups_fill: fp->ptr=%p, fp->end=%p, fp->buf=%p, fp->bufpos=" CUPS_LLFMT ", fp->eof=%d", (void *)fp->ptr, (void *)fp->end, (void *)fp->buf, CUPS_LLCAST fp->bufpos, fp->eof)); | |
2157 | ||
2158 | if (fp->ptr && fp->end) | |
2159 | fp->bufpos += fp->end - fp->buf; | |
2160 | ||
2161 | #ifdef HAVE_LIBZ | |
2162 | DEBUG_printf(("9cups_fill: fp->compressed=%d", fp->compressed)); | |
2163 | ||
2164 | while (!fp->ptr || fp->compressed) | |
2165 | { | |
2166 | /* | |
2167 | * Check to see if we have read any data yet; if not, see if we have a | |
2168 | * compressed file... | |
2169 | */ | |
2170 | ||
2171 | if (!fp->ptr) | |
2172 | { | |
2173 | /* | |
2174 | * Reset the file position in case we are seeking... | |
2175 | */ | |
2176 | ||
2177 | fp->compressed = 0; | |
2178 | ||
2179 | /* | |
2180 | * Read the first bytes in the file to determine if we have a gzip'd | |
2181 | * file... | |
2182 | */ | |
2183 | ||
2184 | if ((bytes = cups_read(fp, (char *)fp->buf, sizeof(fp->buf))) < 0) | |
2185 | { | |
2186 | /* | |
2187 | * Can't read from file! | |
2188 | */ | |
2189 | ||
2190 | DEBUG_printf(("9cups_fill: cups_read() returned " CUPS_LLFMT, | |
2191 | CUPS_LLCAST bytes)); | |
2192 | ||
2193 | fp->eof = 1; | |
2194 | ||
2195 | return (-1); | |
2196 | } | |
2197 | ||
2198 | if (bytes < 10 || fp->buf[0] != 0x1f || | |
2199 | (fp->buf[1] & 255) != 0x8b || | |
2200 | fp->buf[2] != 8 || (fp->buf[3] & 0xe0) != 0) | |
2201 | { | |
2202 | /* | |
2203 | * Not a gzip'd file! | |
2204 | */ | |
2205 | ||
2206 | fp->ptr = fp->buf; | |
2207 | fp->end = fp->buf + bytes; | |
2208 | ||
2209 | DEBUG_printf(("9cups_fill: Returning " CUPS_LLFMT, | |
2210 | CUPS_LLCAST bytes)); | |
2211 | ||
2212 | return (bytes); | |
2213 | } | |
2214 | ||
2215 | /* | |
2216 | * Parse header junk: extra data, original name, and comment... | |
2217 | */ | |
2218 | ||
2219 | ptr = (unsigned char *)fp->buf + 10; | |
2220 | end = (unsigned char *)fp->buf + bytes; | |
2221 | ||
2222 | if (fp->buf[3] & 0x04) | |
2223 | { | |
2224 | /* | |
2225 | * Skip extra data... | |
2226 | */ | |
2227 | ||
2228 | if ((ptr + 2) > end) | |
2229 | { | |
2230 | /* | |
2231 | * Can't read from file! | |
2232 | */ | |
2233 | ||
2234 | DEBUG_puts("9cups_fill: Extra gzip header data missing, returning -1."); | |
2235 | ||
2236 | fp->eof = 1; | |
2237 | errno = EIO; | |
2238 | ||
2239 | return (-1); | |
2240 | } | |
2241 | ||
2242 | bytes = ((unsigned char)ptr[1] << 8) | (unsigned char)ptr[0]; | |
2243 | ptr += 2 + bytes; | |
2244 | ||
2245 | if (ptr > end) | |
2246 | { | |
2247 | /* | |
2248 | * Can't read from file! | |
2249 | */ | |
2250 | ||
2251 | DEBUG_puts("9cups_fill: Extra gzip header data does not fit in initial buffer, returning -1."); | |
2252 | ||
2253 | fp->eof = 1; | |
2254 | errno = EIO; | |
2255 | ||
2256 | return (-1); | |
2257 | } | |
2258 | } | |
2259 | ||
2260 | if (fp->buf[3] & 0x08) | |
2261 | { | |
2262 | /* | |
2263 | * Skip original name data... | |
2264 | */ | |
2265 | ||
2266 | while (ptr < end && *ptr) | |
2267 | ptr ++; | |
2268 | ||
2269 | if (ptr < end) | |
2270 | ptr ++; | |
2271 | else | |
2272 | { | |
2273 | /* | |
2274 | * Can't read from file! | |
2275 | */ | |
2276 | ||
2277 | DEBUG_puts("9cups_fill: Original filename in gzip header data does not fit in initial buffer, returning -1."); | |
2278 | ||
2279 | fp->eof = 1; | |
2280 | errno = EIO; | |
2281 | ||
2282 | return (-1); | |
2283 | } | |
2284 | } | |
2285 | ||
2286 | if (fp->buf[3] & 0x10) | |
2287 | { | |
2288 | /* | |
2289 | * Skip comment data... | |
2290 | */ | |
2291 | ||
2292 | while (ptr < end && *ptr) | |
2293 | ptr ++; | |
2294 | ||
2295 | if (ptr < end) | |
2296 | ptr ++; | |
2297 | else | |
2298 | { | |
2299 | /* | |
2300 | * Can't read from file! | |
2301 | */ | |
2302 | ||
2303 | DEBUG_puts("9cups_fill: Comment in gzip header data does not fit in initial buffer, returning -1."); | |
2304 | ||
2305 | fp->eof = 1; | |
2306 | errno = EIO; | |
2307 | ||
2308 | return (-1); | |
2309 | } | |
2310 | } | |
2311 | ||
2312 | if (fp->buf[3] & 0x02) | |
2313 | { | |
2314 | /* | |
2315 | * Skip header CRC data... | |
2316 | */ | |
2317 | ||
2318 | ptr += 2; | |
2319 | ||
2320 | if (ptr > end) | |
2321 | { | |
2322 | /* | |
2323 | * Can't read from file! | |
2324 | */ | |
2325 | ||
2326 | DEBUG_puts("9cups_fill: Header CRC in gzip header data does not fit in initial buffer, returning -1."); | |
2327 | ||
2328 | fp->eof = 1; | |
2329 | errno = EIO; | |
2330 | ||
2331 | return (-1); | |
2332 | } | |
2333 | } | |
2334 | ||
2335 | /* | |
2336 | * Copy the flate-compressed data to the compression buffer... | |
2337 | */ | |
2338 | ||
2339 | if ((bytes = end - ptr) > 0) | |
2340 | memcpy(fp->cbuf, ptr, (size_t)bytes); | |
2341 | ||
2342 | /* | |
2343 | * Setup the decompressor data... | |
2344 | */ | |
2345 | ||
2346 | fp->stream.zalloc = (alloc_func)0; | |
2347 | fp->stream.zfree = (free_func)0; | |
2348 | fp->stream.opaque = (voidpf)0; | |
2349 | fp->stream.next_in = (Bytef *)fp->cbuf; | |
2350 | fp->stream.next_out = NULL; | |
2351 | fp->stream.avail_in = (uInt)bytes; | |
2352 | fp->stream.avail_out = 0; | |
2353 | fp->crc = crc32(0L, Z_NULL, 0); | |
2354 | ||
2355 | if ((status = inflateInit2(&(fp->stream), -15)) != Z_OK) | |
2356 | { | |
2357 | DEBUG_printf(("9cups_fill: inflateInit2 returned %d, returning -1.", status)); | |
2358 | ||
2359 | fp->eof = 1; | |
2360 | errno = EIO; | |
2361 | ||
2362 | return (-1); | |
2363 | } | |
2364 | ||
2365 | fp->compressed = 1; | |
2366 | } | |
2367 | ||
2368 | if (fp->compressed) | |
2369 | { | |
2370 | /* | |
2371 | * If we have reached end-of-file, return immediately... | |
2372 | */ | |
2373 | ||
2374 | if (fp->eof) | |
2375 | { | |
2376 | DEBUG_puts("9cups_fill: EOF, returning 0."); | |
2377 | ||
2378 | return (0); | |
2379 | } | |
2380 | ||
2381 | /* | |
2382 | * Fill the decompression buffer as needed... | |
2383 | */ | |
2384 | ||
2385 | if (fp->stream.avail_in == 0) | |
2386 | { | |
2387 | if ((bytes = cups_read(fp, (char *)fp->cbuf, sizeof(fp->cbuf))) <= 0) | |
2388 | { | |
2389 | DEBUG_printf(("9cups_fill: cups_read error, returning %d.", (int)bytes)); | |
2390 | ||
2391 | fp->eof = 1; | |
2392 | ||
2393 | return (bytes); | |
2394 | } | |
2395 | ||
2396 | fp->stream.next_in = fp->cbuf; | |
2397 | fp->stream.avail_in = (uInt)bytes; | |
2398 | } | |
2399 | ||
2400 | /* | |
2401 | * Decompress data from the buffer... | |
2402 | */ | |
2403 | ||
2404 | fp->stream.next_out = (Bytef *)fp->buf; | |
2405 | fp->stream.avail_out = sizeof(fp->buf); | |
2406 | ||
2407 | status = inflate(&(fp->stream), Z_NO_FLUSH); | |
2408 | ||
2409 | if (fp->stream.next_out > (Bytef *)fp->buf) | |
2410 | fp->crc = crc32(fp->crc, (Bytef *)fp->buf, | |
2411 | (uInt)(fp->stream.next_out - (Bytef *)fp->buf)); | |
2412 | ||
2413 | if (status == Z_STREAM_END) | |
2414 | { | |
2415 | /* | |
2416 | * Read the CRC and length... | |
2417 | */ | |
2418 | ||
2419 | unsigned char trailer[8]; /* Trailer bytes */ | |
2420 | uLong tcrc; /* Trailer CRC */ | |
2421 | ssize_t tbytes = 0; /* Number of bytes */ | |
2422 | ||
2423 | if (fp->stream.avail_in > 0) | |
2424 | { | |
2425 | if (fp->stream.avail_in > sizeof(trailer)) | |
2426 | tbytes = (ssize_t)sizeof(trailer); | |
2427 | else | |
2428 | tbytes = (ssize_t)fp->stream.avail_in; | |
2429 | ||
2430 | memcpy(trailer, fp->stream.next_in, (size_t)tbytes); | |
2431 | fp->stream.next_in += tbytes; | |
2432 | fp->stream.avail_in -= (size_t)tbytes; | |
2433 | } | |
2434 | ||
2435 | if (tbytes < (ssize_t)sizeof(trailer)) | |
2436 | { | |
2437 | if (read(fp->fd, trailer + tbytes, sizeof(trailer) - (size_t)tbytes) < ((ssize_t)sizeof(trailer) - tbytes)) | |
2438 | { | |
2439 | /* | |
2440 | * Can't get it, so mark end-of-file... | |
2441 | */ | |
2442 | ||
2443 | DEBUG_puts("9cups_fill: Unable to read gzip CRC trailer, returning -1."); | |
2444 | ||
2445 | fp->eof = 1; | |
2446 | errno = EIO; | |
2447 | ||
2448 | return (-1); | |
2449 | } | |
2450 | } | |
2451 | ||
2452 | tcrc = ((((((uLong)trailer[3] << 8) | (uLong)trailer[2]) << 8) | | |
2453 | (uLong)trailer[1]) << 8) | (uLong)trailer[0]; | |
2454 | ||
2455 | if (tcrc != fp->crc) | |
2456 | { | |
2457 | /* | |
2458 | * Bad CRC, mark end-of-file... | |
2459 | */ | |
2460 | ||
2461 | DEBUG_printf(("9cups_fill: tcrc=%08x != fp->crc=%08x, returning -1.", (unsigned int)tcrc, (unsigned int)fp->crc)); | |
2462 | ||
2463 | fp->eof = 1; | |
2464 | errno = EIO; | |
2465 | ||
2466 | return (-1); | |
2467 | } | |
2468 | ||
2469 | /* | |
2470 | * Otherwise, reset the compressed flag so that we re-read the | |
2471 | * file header... | |
2472 | */ | |
2473 | ||
2474 | inflateEnd(&fp->stream); | |
2475 | ||
2476 | fp->compressed = 0; | |
2477 | } | |
2478 | else if (status < Z_OK) | |
2479 | { | |
2480 | DEBUG_printf(("9cups_fill: inflate returned %d, returning -1.", status)); | |
2481 | ||
2482 | fp->eof = 1; | |
2483 | errno = EIO; | |
2484 | ||
2485 | return (-1); | |
2486 | } | |
2487 | ||
2488 | bytes = (ssize_t)sizeof(fp->buf) - (ssize_t)fp->stream.avail_out; | |
2489 | ||
2490 | /* | |
2491 | * Return the decompressed data... | |
2492 | */ | |
2493 | ||
2494 | fp->ptr = fp->buf; | |
2495 | fp->end = fp->buf + bytes; | |
2496 | ||
2497 | if (bytes) | |
2498 | { | |
2499 | DEBUG_printf(("9cups_fill: Returning %d.", (int)bytes)); | |
2500 | return (bytes); | |
2501 | } | |
2502 | } | |
2503 | } | |
2504 | #endif /* HAVE_LIBZ */ | |
2505 | ||
2506 | /* | |
2507 | * Read a buffer's full of data... | |
2508 | */ | |
2509 | ||
2510 | if ((bytes = cups_read(fp, fp->buf, sizeof(fp->buf))) <= 0) | |
2511 | { | |
2512 | /* | |
2513 | * Can't read from file! | |
2514 | */ | |
2515 | ||
2516 | fp->eof = 1; | |
2517 | fp->ptr = fp->buf; | |
2518 | fp->end = fp->buf; | |
2519 | } | |
2520 | else | |
2521 | { | |
2522 | /* | |
2523 | * Return the bytes we read... | |
2524 | */ | |
2525 | ||
2526 | fp->eof = 0; | |
2527 | fp->ptr = fp->buf; | |
2528 | fp->end = fp->buf + bytes; | |
2529 | } | |
2530 | ||
2531 | DEBUG_printf(("9cups_fill: Not gzip, returning %d.", (int)bytes)); | |
2532 | ||
2533 | return (bytes); | |
2534 | } | |
2535 | ||
2536 | ||
2537 | /* | |
2538 | * 'cups_open()' - Safely open a file for writing. | |
2539 | * | |
2540 | * We don't allow appending to directories or files that are hard-linked or | |
2541 | * symlinked. | |
2542 | */ | |
2543 | ||
2544 | static int /* O - File descriptor or -1 otherwise */ | |
2545 | cups_open(const char *filename, /* I - Filename */ | |
2546 | int mode) /* I - Open mode */ | |
2547 | { | |
2548 | int fd; /* File descriptor */ | |
2549 | struct stat fileinfo; /* File information */ | |
2550 | #ifndef WIN32 | |
2551 | struct stat linkinfo; /* Link information */ | |
2552 | #endif /* !WIN32 */ | |
2553 | ||
2554 | ||
2555 | /* | |
2556 | * Open the file... | |
2557 | */ | |
2558 | ||
2559 | if ((fd = open(filename, mode, 0666)) < 0) | |
2560 | return (-1); | |
2561 | ||
2562 | /* | |
2563 | * Then verify that the file descriptor doesn't point to a directory or hard- | |
2564 | * linked file. | |
2565 | */ | |
2566 | ||
2567 | if (fstat(fd, &fileinfo)) | |
2568 | { | |
2569 | close(fd); | |
2570 | return (-1); | |
2571 | } | |
2572 | ||
2573 | if (fileinfo.st_nlink != 1) | |
2574 | { | |
2575 | close(fd); | |
2576 | errno = EPERM; | |
2577 | return (-1); | |
2578 | } | |
2579 | ||
2580 | #ifdef WIN32 | |
2581 | if (fileinfo.st_mode & _S_IFDIR) | |
2582 | #else | |
2583 | if (S_ISDIR(fileinfo.st_mode)) | |
2584 | #endif /* WIN32 */ | |
2585 | { | |
2586 | close(fd); | |
2587 | errno = EISDIR; | |
2588 | return (-1); | |
2589 | } | |
2590 | ||
2591 | #ifndef WIN32 | |
2592 | /* | |
2593 | * Then use lstat to determine whether the filename is a symlink... | |
2594 | */ | |
2595 | ||
2596 | if (lstat(filename, &linkinfo)) | |
2597 | { | |
2598 | close(fd); | |
2599 | return (-1); | |
2600 | } | |
2601 | ||
2602 | if (S_ISLNK(linkinfo.st_mode) || | |
2603 | fileinfo.st_dev != linkinfo.st_dev || | |
2604 | fileinfo.st_ino != linkinfo.st_ino || | |
2605 | #ifdef HAVE_ST_GEN | |
2606 | fileinfo.st_gen != linkinfo.st_gen || | |
2607 | #endif /* HAVE_ST_GEN */ | |
2608 | fileinfo.st_nlink != linkinfo.st_nlink || | |
2609 | fileinfo.st_mode != linkinfo.st_mode) | |
2610 | { | |
2611 | /* | |
2612 | * Yes, don't allow! | |
2613 | */ | |
2614 | ||
2615 | close(fd); | |
2616 | errno = EPERM; | |
2617 | return (-1); | |
2618 | } | |
2619 | #endif /* !WIN32 */ | |
2620 | ||
2621 | return (fd); | |
2622 | } | |
2623 | ||
2624 | ||
2625 | /* | |
2626 | * 'cups_read()' - Read from a file descriptor. | |
2627 | */ | |
2628 | ||
2629 | static ssize_t /* O - Number of bytes read or -1 */ | |
2630 | cups_read(cups_file_t *fp, /* I - CUPS file */ | |
2631 | char *buf, /* I - Buffer */ | |
2632 | size_t bytes) /* I - Number bytes */ | |
2633 | { | |
2634 | ssize_t total; /* Total bytes read */ | |
2635 | ||
2636 | ||
2637 | DEBUG_printf(("7cups_read(fp=%p, buf=%p, bytes=" CUPS_LLFMT ")", (void *)fp, (void *)buf, CUPS_LLCAST bytes)); | |
2638 | ||
2639 | /* | |
2640 | * Loop until we read at least 0 bytes... | |
2641 | */ | |
2642 | ||
2643 | for (;;) | |
2644 | { | |
2645 | #ifdef WIN32 | |
2646 | if (fp->mode == 's') | |
2647 | total = (ssize_t)recv(fp->fd, buf, (unsigned)bytes, 0); | |
2648 | else | |
2649 | total = (ssize_t)read(fp->fd, buf, (unsigned)bytes); | |
2650 | #else | |
2651 | if (fp->mode == 's') | |
2652 | total = recv(fp->fd, buf, bytes, 0); | |
2653 | else | |
2654 | total = read(fp->fd, buf, bytes); | |
2655 | #endif /* WIN32 */ | |
2656 | ||
2657 | DEBUG_printf(("9cups_read: total=" CUPS_LLFMT, CUPS_LLCAST total)); | |
2658 | ||
2659 | if (total >= 0) | |
2660 | break; | |
2661 | ||
2662 | /* | |
2663 | * Reads can be interrupted by signals and unavailable resources... | |
2664 | */ | |
2665 | ||
2666 | if (errno == EAGAIN || errno == EINTR) | |
2667 | continue; | |
2668 | else | |
2669 | return (-1); | |
2670 | } | |
2671 | ||
2672 | /* | |
2673 | * Return the total number of bytes read... | |
2674 | */ | |
2675 | ||
2676 | return (total); | |
2677 | } | |
2678 | ||
2679 | ||
2680 | /* | |
2681 | * 'cups_write()' - Write to a file descriptor. | |
2682 | */ | |
2683 | ||
2684 | static ssize_t /* O - Number of bytes written or -1 */ | |
2685 | cups_write(cups_file_t *fp, /* I - CUPS file */ | |
2686 | const char *buf, /* I - Buffer */ | |
2687 | size_t bytes) /* I - Number bytes */ | |
2688 | { | |
2689 | size_t total; /* Total bytes written */ | |
2690 | ssize_t count; /* Count this time */ | |
2691 | ||
2692 | ||
2693 | DEBUG_printf(("7cups_write(fp=%p, buf=%p, bytes=" CUPS_LLFMT ")", (void *)fp, (void *)buf, CUPS_LLCAST bytes)); | |
2694 | ||
2695 | /* | |
2696 | * Loop until all bytes are written... | |
2697 | */ | |
2698 | ||
2699 | total = 0; | |
2700 | while (bytes > 0) | |
2701 | { | |
2702 | #ifdef WIN32 | |
2703 | if (fp->mode == 's') | |
2704 | count = (ssize_t)send(fp->fd, buf, (unsigned)bytes, 0); | |
2705 | else | |
2706 | count = (ssize_t)write(fp->fd, buf, (unsigned)bytes); | |
2707 | #else | |
2708 | if (fp->mode == 's') | |
2709 | count = send(fp->fd, buf, bytes, 0); | |
2710 | else | |
2711 | count = write(fp->fd, buf, bytes); | |
2712 | #endif /* WIN32 */ | |
2713 | ||
2714 | DEBUG_printf(("9cups_write: count=" CUPS_LLFMT, CUPS_LLCAST count)); | |
2715 | ||
2716 | if (count < 0) | |
2717 | { | |
2718 | /* | |
2719 | * Writes can be interrupted by signals and unavailable resources... | |
2720 | */ | |
2721 | ||
2722 | if (errno == EAGAIN || errno == EINTR) | |
2723 | continue; | |
2724 | else | |
2725 | return (-1); | |
2726 | } | |
2727 | ||
2728 | /* | |
2729 | * Update the counts for the last write call... | |
2730 | */ | |
2731 | ||
2732 | bytes -= (size_t)count; | |
2733 | total += (size_t)count; | |
2734 | buf += count; | |
2735 | } | |
2736 | ||
2737 | /* | |
2738 | * Return the total number of bytes written... | |
2739 | */ | |
2740 | ||
2741 | return ((ssize_t)total); | |
2742 | } |