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root/cebix/BasiliskII/src/Unix/extfs_unix.cpp

Comparing BasiliskII/src/Unix/extfs_unix.cpp (file contents):
Revision 1.2 by cebix, 1999-10-20T17:23:56Z vs.
Revision 1.11 by cebix, 2000-01-21T13:47:04Z

#	Line 57 | Line 57 | void extfs_exit(void)
57
58
59		/*
60	+	*  Add component to path name
61	+	*/
62	+
63	+	void add_path_component(char *path, const char *component)
64	+	{
65	+	int l = strlen(path);
66	+	if (l < MAX_PATH_LENGTH-1 && path[l-1] != '/') {
67	+	path[l] = '/';
68	+	path[l+1] = 0;
69	+	}
70	+	strncat(path, component, MAX_PATH_LENGTH-1);
71	+	}
72	+
73	+
74	+	/*
75	+	*  Finder info and resource forks are kept in helper files
76	+	*
77	+	*  Finder info:
78	+	*    /path/.finf/file
79	+	*  Resource fork:
80	+	*    /path/.rsrc/file
81	+	*/
82	+
83	+	// Layout of Finder info helper files (all fields big-endian)
84	+	struct finf_struct {
85	+	uint32 type;
86	+	uint32 creator;
87	+	uint16 flags;
88	+	uint8 pad0[22]; // total size: 32 bytes to match the size of FInfo+FXInfo
89	+	};
90	+
91	+	static void make_helper_path(const char *src, char *dest, const char *add, bool only_dir = false)
92	+	{
93	+	dest[0] = 0;
94	+
95	+	// Get pointer to last component of path
96	+	const char *last_part = strrchr(src, '/');
97	+	if (last_part)
98	+	last_part++;
99	+	else
100	+	last_part = src;
101	+
102	+	// Copy everything before
103	+	strncpy(dest, src, last_part-src);
104	+	dest[last_part-src] = 0;
105	+
106	+	// Add additional component
107	+	strncat(dest, add, MAX_PATH_LENGTH-1);
108	+
109	+	// Add last component
110	+	if (!only_dir)
111	+	strncat(dest, last_part, MAX_PATH_LENGTH-1);
112	+	}
113	+
114	+	static int create_helper_dir(const char *path, const char *add)
115	+	{
116	+	char helper_dir[MAX_PATH_LENGTH];
117	+	make_helper_path(path, helper_dir, add, true);
118	+	return mkdir(helper_dir, 0777);
119	+	}
120	+
121	+	static int open_helper(const char *path, const char *add, int flag)
122	+	{
123	+	char helper_path[MAX_PATH_LENGTH];
124	+	make_helper_path(path, helper_path, add);
125	+
126	+	if ((flag & O_ACCMODE) == O_RDWR || (flag & O_ACCMODE) == O_WRONLY)
127	+	flag |= O_CREAT;
128	+	int fd = open(helper_path, flag, 0666);
129	+	if (fd < 0) {
130	+	if (errno == ENOENT && (flag & O_CREAT)) {
131	+	// One path component was missing, probably the helper
132	+	// directory. Try to create it and re-open the file.
133	+	int ret = create_helper_dir(path, add);
134	+	if (ret < 0)
135	+	return ret;
136	+	fd = open(helper_path, flag, 0666);
137	+	}
138	+	}
139	+	return fd;
140	+	}
141	+
142	+	static int open_finf(const char *path, int flag)
143	+	{
144	+	return open_helper(path, ".finf/", flag);
145	+	}
146	+
147	+	static int open_rsrc(const char *path, int flag)
148	+	{
149	+	return open_helper(path, ".rsrc/", flag);
150	+	}
151	+
152	+
153	+	/*
154		*  Get/set finder type/creator for file specified by full path
155		*/
156
#	Line 126 | Line 220 | void get_finder_type(const char *path, u
220		type = 0;
221		creator = 0;
222
223	<	// Translate file name extension to MacOS type/creator
223	>	// Open Finder info file
224	>	int fd = open_finf(path, O_RDONLY);
225	>	if (fd >= 0) {
226	>
227	>	// Read file
228	>	finf_struct finf;
229	>	if (read(fd, &finf, sizeof(finf_struct)) >= 8) {
230	>
231	>	// Type/creator are in Finder info file, return them
232	>	type = ntohl(finf.type);
233	>	creator = ntohl(finf.creator);
234	>	close(fd);
235	>	return;
236	>	}
237	>	close(fd);
238	>	}
239	>
240	>	// No Finder info file, translate file name extension to MacOS type/creator
241		int path_len = strlen(path);
242		for (int i=0; e2t_translation[i].ext; i++) {
243		int ext_len = strlen(e2t_translation[i].ext);
#	Line 142 | Line 253 | void get_finder_type(const char *path, u
253
254		void set_finder_type(const char *path, uint32 type, uint32 creator)
255		{
256	+	// Open Finder info file
257	+	int fd = open_finf(path, O_RDWR);
258	+	if (fd < 0)
259	+	return;
260	+
261	+	// Read file
262	+	finf_struct finf;
263	+	finf.flags = DEFAULT_FINDER_FLAGS;
264	+	memset(&finf, 0, sizeof(finf_struct));
265	+	read(fd, &finf, sizeof(finf_struct));
266	+
267	+	// Set Finder flags
268	+	finf.type = htonl(type);
269	+	finf.creator = htonl(creator);
270	+
271	+	// Update file
272	+	lseek(fd, 0, SEEK_SET);
273	+	write(fd, &finf, sizeof(finf_struct));
274	+	close(fd);
275		}
276
277
278		/*
279	<	*  Get/set finder flags for file/dir specified by full path (MACOS:HFS_FLAGS attribute)
279	>	*  Get/set finder flags for file/dir specified by full path
280		*/
281
282		void get_finder_flags(const char *path, uint16 &flags)
283		{
284		flags = DEFAULT_FINDER_FLAGS;   // Default
285	+
286	+	// Open Finder info file
287	+	int fd = open_finf(path, O_RDONLY);
288	+	if (fd < 0)
289	+	return;
290	+
291	+	// Read Finder flags
292	+	finf_struct finf;
293	+	if (read(fd, &finf, sizeof(finf_struct)) >= 10)
294	+	flags = ntohs(finf.flags);
295	+
296	+	// Close file
297	+	close(fd);
298		}
299
300		void set_finder_flags(const char *path, uint16 flags)
301		{
302	+	// Open Finder info file
303	+	int fd = open_finf(path, O_RDWR);
304	+	if (fd < 0)
305	+	return;
306	+
307	+	// Read file
308	+	finf_struct finf;
309	+	memset(&finf, 0, sizeof(finf_struct));
310	+	finf.flags = DEFAULT_FINDER_FLAGS;
311	+	read(fd, &finf, sizeof(finf_struct));
312	+
313	+	// Set Finder flags
314	+	finf.flags = htons(flags);
315	+
316	+	// Update file
317	+	lseek(fd, 0, SEEK_SET);
318	+	write(fd, &finf, sizeof(finf_struct));
319	+	close(fd);
320		}
321
322
#	Line 165 | Line 326 | void set_finder_flags(const char *path,
326
327		uint32 get_rfork_size(const char *path)
328		{
329	<	return 0;
329	>	// Open resource file
330	>	int fd = open_rsrc(path, O_RDONLY);
331	>	if (fd < 0)
332	>	return 0;
333	>
334	>	// Get size
335	>	off_t size = lseek(fd, 0, SEEK_END);
336	>
337	>	// Close file and return size
338	>	close(fd);
339	>	return size < 0 ? 0 : size;
340		}
341
342		int open_rfork(const char *path, int flag)
343		{
344	<	return -1;
344	>	return open_rsrc(path, flag);
345		}
346
347		void close_rfork(const char *path, int fd)
348		{
349	+	close(fd);
350		}
351
352
353		/*
354		*  Read "length" bytes from file to "buffer",
355	<	*  returns number of bytes read (or 0)
355	>	*  returns number of bytes read (or -1 on error)
356		*/
357
358	<	size_t extfs_read(int fd, void *buffer, size_t length)
358	>	ssize_t extfs_read(int fd, void *buffer, size_t length)
359		{
188	–	errno = 0;
360		return read(fd, buffer, length);
361		}
362
363
364		/*
365		*  Write "length" bytes from "buffer" to file,
366	<	*  returns number of bytes written (or 0)
366	>	*  returns number of bytes written (or -1 on error)
367		*/
368
369	<	size_t extfs_write(int fd, void *buffer, size_t length)
369	>	ssize_t extfs_write(int fd, void *buffer, size_t length)
370		{
200	–	errno = 0;
371		return write(fd, buffer, length);
372		}
373	+
374	+
375	+	/*
376	+	*  Remove file/directory (and associated helper files),
377	+	*  returns false on error (and sets errno)
378	+	*/
379	+
380	+	bool extfs_remove(const char *path)
381	+	{
382	+	// Remove helpers first, don't complain if this fails
383	+	char helper_path[MAX_PATH_LENGTH];
384	+	make_helper_path(path, helper_path, ".finf/", false);
385	+	remove(helper_path);
386	+	make_helper_path(path, helper_path, ".rsrc/", false);
387	+	remove(helper_path);
388	+
389	+	// Now remove file or directory (and helper directories in the directory)
390	+	if (remove(path) < 0) {
391	+	if (errno == EISDIR || errno == ENOTEMPTY) {
392	+	helper_path[0] = 0;
393	+	strncpy(helper_path, path, MAX_PATH_LENGTH-1);
394	+	add_path_component(helper_path, ".finf");
395	+	rmdir(helper_path);
396	+	helper_path[0] = 0;
397	+	strncpy(helper_path, path, MAX_PATH_LENGTH-1);
398	+	add_path_component(helper_path, ".rsrc");
399	+	rmdir(helper_path);
400	+	return rmdir(path) == 0;
401	+	} else
402	+	return false;
403	+	}
404	+	return true;
405	+	}
406	+
407	+
408	+	/*
409	+	*  Rename/move file/directory (and associated helper files),
410	+	*  returns false on error (and sets errno)
411	+	*/
412	+
413	+	bool extfs_rename(const char *old_path, const char *new_path)
414	+	{
415	+	// Rename helpers first, don't complain if this fails
416	+	char old_helper_path[MAX_PATH_LENGTH], new_helper_path[MAX_PATH_LENGTH];
417	+	make_helper_path(old_path, old_helper_path, ".finf/", false);
418	+	make_helper_path(new_path, new_helper_path, ".finf/", false);
419	+	create_helper_dir(new_path, ".finf/");
420	+	rename(old_helper_path, new_helper_path);
421	+	make_helper_path(old_path, old_helper_path, ".rsrc/", false);
422	+	make_helper_path(new_path, new_helper_path, ".rsrc/", false);
423	+	create_helper_dir(new_path, ".rsrc/");
424	+	rename(old_helper_path, new_helper_path);
425	+
426	+	// Now rename file
427	+	return rename(old_path, new_path) == 0;
428	+	}

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