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[thirdparty/cups.git] / cups / dir.c
1 /*
2 * Directory routines for CUPS.
3 *
4 * This set of APIs abstracts enumeration of directory entries.
5 *
6 * Copyright 2007-2017 by Apple Inc.
7 * Copyright 1997-2005 by Easy Software Products, all rights reserved.
8 *
9 * These coded instructions, statements, and computer programs are the
10 * property of Apple Inc. and are protected by Federal copyright
11 * law. Distribution and use rights are outlined in the file "LICENSE.txt"
12 * which should have been included with this file. If this file is
13 * missing or damaged, see the license at "http://www.cups.org/".
14 */
15
16 /*
17 * Include necessary headers...
18 */
19
20 #include "string-private.h"
21 #include "debug-private.h"
22 #include "dir.h"
23
24
25 /*
26 * Windows implementation...
27 */
28
29 #ifdef WIN32
30 # include <windows.h>
31
32 /*
33 * Types and structures...
34 */
35
36 struct _cups_dir_s /**** Directory data structure ****/
37 {
38 char directory[1024]; /* Directory filename */
39 HANDLE dir; /* Directory handle */
40 cups_dentry_t entry; /* Directory entry */
41 };
42
43
44 /*
45 * '_cups_dir_time()' - Convert a FILETIME value to a UNIX time value.
46 */
47
48 time_t /* O - UNIX time */
49 _cups_dir_time(FILETIME ft) /* I - File time */
50 {
51 ULONGLONG val; /* File time in 0.1 usecs */
52
53
54 /*
55 * Convert file time (1/10 microseconds since Jan 1, 1601) to UNIX
56 * time (seconds since Jan 1, 1970). There are 11,644,732,800 seconds
57 * between them...
58 */
59
60 val = ft.dwLowDateTime + ((ULONGLONG)ft.dwHighDateTime << 32);
61 return ((time_t)(val / 10000000 - 11644732800));
62 }
63
64
65 /*
66 * 'cupsDirClose()' - Close a directory.
67 *
68 * @since CUPS 1.2/macOS 10.5@
69 */
70
71 void
72 cupsDirClose(cups_dir_t *dp) /* I - Directory pointer */
73 {
74 /*
75 * Range check input...
76 */
77
78 if (!dp)
79 return;
80
81 /*
82 * Close an open directory handle...
83 */
84
85 if (dp->dir != INVALID_HANDLE_VALUE)
86 FindClose(dp->dir);
87
88 /*
89 * Free memory used...
90 */
91
92 free(dp);
93 }
94
95
96 /*
97 * 'cupsDirOpen()' - Open a directory.
98 *
99 * @since CUPS 1.2/macOS 10.5@
100 */
101
102 cups_dir_t * /* O - Directory pointer or @code NULL@ if the directory could not be opened. */
103 cupsDirOpen(const char *directory) /* I - Directory name */
104 {
105 cups_dir_t *dp; /* Directory */
106
107
108 /*
109 * Range check input...
110 */
111
112 if (!directory)
113 return (NULL);
114
115 /*
116 * Allocate memory for the directory structure...
117 */
118
119 dp = (cups_dir_t *)calloc(1, sizeof(cups_dir_t));
120 if (!dp)
121 return (NULL);
122
123 /*
124 * Copy the directory name for later use...
125 */
126
127 dp->dir = INVALID_HANDLE_VALUE;
128
129 strlcpy(dp->directory, directory, sizeof(dp->directory));
130
131 /*
132 * Return the new directory structure...
133 */
134
135 return (dp);
136 }
137
138
139 /*
140 * 'cupsDirRead()' - Read the next directory entry.
141 *
142 * @since CUPS 1.2/macOS 10.5@
143 */
144
145 cups_dentry_t * /* O - Directory entry or @code NULL@ if there are no more */
146 cupsDirRead(cups_dir_t *dp) /* I - Directory pointer */
147 {
148 WIN32_FIND_DATA entry; /* Directory entry data */
149
150
151 /*
152 * Range check input...
153 */
154
155 if (!dp)
156 return (NULL);
157
158 /*
159 * See if we have already started finding files...
160 */
161
162 if (dp->dir == INVALID_HANDLE_VALUE)
163 {
164 /*
165 * No, find the first file...
166 */
167
168 dp->dir = FindFirstFile(dp->directory, &entry);
169 if (dp->dir == INVALID_HANDLE_VALUE)
170 return (NULL);
171 }
172 else if (!FindNextFile(dp->dir, &entry))
173 return (NULL);
174
175 /*
176 * Copy the name over and convert the file information...
177 */
178
179 strlcpy(dp->entry.filename, entry.cFileName, sizeof(dp->entry.filename));
180
181 if (entry.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
182 dp->entry.fileinfo.st_mode = 0755 | S_IFDIR;
183 else
184 dp->entry.fileinfo.st_mode = 0644;
185
186 dp->entry.fileinfo.st_atime = _cups_dir_time(entry.ftLastAccessTime);
187 dp->entry.fileinfo.st_ctime = _cups_dir_time(entry.ftCreationTime);
188 dp->entry.fileinfo.st_mtime = _cups_dir_time(entry.ftLastWriteTime);
189 dp->entry.fileinfo.st_size = entry.nFileSizeLow + ((unsigned long long)entry.nFileSizeHigh << 32);
190
191 /*
192 * Return the entry...
193 */
194
195 return (&(dp->entry));
196 }
197
198
199 /*
200 * 'cupsDirRewind()' - Rewind to the start of the directory.
201 *
202 * @since CUPS 1.2/macOS 10.5@
203 */
204
205 void
206 cupsDirRewind(cups_dir_t *dp) /* I - Directory pointer */
207 {
208 /*
209 * Range check input...
210 */
211
212 if (!dp)
213 return;
214
215 /*
216 * Close an open directory handle...
217 */
218
219 if (dp->dir != INVALID_HANDLE_VALUE)
220 {
221 FindClose(dp->dir);
222 dp->dir = INVALID_HANDLE_VALUE;
223 }
224 }
225
226
227 #else
228
229 /*
230 * POSIX implementation...
231 */
232
233 # include <sys/types.h>
234 # include <dirent.h>
235
236
237 /*
238 * Types and structures...
239 */
240
241 struct _cups_dir_s /**** Directory data structure ****/
242 {
243 char directory[1024]; /* Directory filename */
244 DIR *dir; /* Directory file */
245 cups_dentry_t entry; /* Directory entry */
246 };
247
248
249 /*
250 * 'cupsDirClose()' - Close a directory.
251 *
252 * @since CUPS 1.2/macOS 10.5@
253 */
254
255 void
256 cupsDirClose(cups_dir_t *dp) /* I - Directory pointer */
257 {
258 DEBUG_printf(("cupsDirClose(dp=%p)", (void *)dp));
259
260 /*
261 * Range check input...
262 */
263
264 if (!dp)
265 return;
266
267 /*
268 * Close the directory and free memory...
269 */
270
271 closedir(dp->dir);
272 free(dp);
273 }
274
275
276 /*
277 * 'cupsDirOpen()' - Open a directory.
278 *
279 * @since CUPS 1.2/macOS 10.5@
280 */
281
282 cups_dir_t * /* O - Directory pointer or @code NULL@ if the directory could not be opened. */
283 cupsDirOpen(const char *directory) /* I - Directory name */
284 {
285 cups_dir_t *dp; /* Directory */
286
287
288 DEBUG_printf(("cupsDirOpen(directory=\"%s\")", directory));
289
290 /*
291 * Range check input...
292 */
293
294 if (!directory)
295 return (NULL);
296
297 /*
298 * Allocate memory for the directory structure...
299 */
300
301 dp = (cups_dir_t *)calloc(1, sizeof(cups_dir_t));
302 if (!dp)
303 return (NULL);
304
305 /*
306 * Open the directory...
307 */
308
309 dp->dir = opendir(directory);
310 if (!dp->dir)
311 {
312 free(dp);
313 return (NULL);
314 }
315
316 /*
317 * Copy the directory name for later use...
318 */
319
320 strlcpy(dp->directory, directory, sizeof(dp->directory));
321
322 /*
323 * Return the new directory structure...
324 */
325
326 return (dp);
327 }
328
329
330 /*
331 * 'cupsDirRead()' - Read the next directory entry.
332 *
333 * @since CUPS 1.2/macOS 10.5@
334 */
335
336 cups_dentry_t * /* O - Directory entry or @code NULL@ when there are no more */
337 cupsDirRead(cups_dir_t *dp) /* I - Directory pointer */
338 {
339 struct dirent *entry; /* Pointer to entry */
340 char filename[1024]; /* Full filename */
341
342
343 DEBUG_printf(("2cupsDirRead(dp=%p)", (void *)dp));
344
345 /*
346 * Range check input...
347 */
348
349 if (!dp)
350 return (NULL);
351
352 /*
353 * Try reading an entry that is not "." or ".."...
354 */
355
356 for (;;)
357 {
358 /*
359 * Read the next entry...
360 */
361
362 if ((entry = readdir(dp->dir)) == NULL)
363 {
364 DEBUG_puts("3cupsDirRead: readdir() returned a NULL pointer!");
365 return (NULL);
366 }
367
368 DEBUG_printf(("4cupsDirRead: readdir() returned \"%s\"...", entry->d_name));
369
370 /*
371 * Skip "." and ".."...
372 */
373
374 if (!strcmp(entry->d_name, ".") || !strcmp(entry->d_name, ".."))
375 continue;
376
377 /*
378 * Copy the name over and get the file information...
379 */
380
381 strlcpy(dp->entry.filename, entry->d_name, sizeof(dp->entry.filename));
382
383 snprintf(filename, sizeof(filename), "%s/%s", dp->directory, entry->d_name);
384
385 if (stat(filename, &(dp->entry.fileinfo)))
386 {
387 DEBUG_printf(("3cupsDirRead: stat() failed for \"%s\" - %s...", filename,
388 strerror(errno)));
389 continue;
390 }
391
392 /*
393 * Return the entry...
394 */
395
396 return (&(dp->entry));
397 }
398 }
399
400
401 /*
402 * 'cupsDirRewind()' - Rewind to the start of the directory.
403 *
404 * @since CUPS 1.2/macOS 10.5@
405 */
406
407 void
408 cupsDirRewind(cups_dir_t *dp) /* I - Directory pointer */
409 {
410 DEBUG_printf(("cupsDirRewind(dp=%p)", (void *)dp));
411
412 /*
413 * Range check input...
414 */
415
416 if (!dp)
417 return;
418
419 /*
420 * Rewind the directory...
421 */
422
423 rewinddir(dp->dir);
424 }
425 #endif /* WIN32 */