dir.c@ 1450

Last change on this file since 1450 was 1450, checked in by bird, 17 years ago
cosmetics.
Property svn:eol-style set to `native`
File size: 31.3 KB

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1	/* Directory hashing for GNU Make.
2	Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3	1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software
4	Foundation, Inc.
5	This file is part of GNU Make.
6
7	GNU Make is free software; you can redistribute it and/or modify it under the
8	terms of the GNU General Public License as published by the Free Software
9	Foundation; either version 2, or (at your option) any later version.
10
11	GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
12	WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
13	A PARTICULAR PURPOSE. See the GNU General Public License for more details.
14
15	You should have received a copy of the GNU General Public License along with
16	GNU Make; see the file COPYING. If not, write to the Free Software
17	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. */
18
19	#include "make.h"
20	#include "hash.h"
21
22	#ifdef HAVE_DIRENT_H
23	# include <dirent.h>
24	# define NAMLEN(dirent) strlen((dirent)->d_name)
25	# ifdef VMS
26	char vmsify (char name, int type);
27	# endif
28	#else
29	# define dirent direct
30	# define NAMLEN(dirent) (dirent)->d_namlen
31	# ifdef HAVE_SYS_NDIR_H
32	# include <sys/ndir.h>
33	# endif
34	# ifdef HAVE_SYS_DIR_H
35	# include <sys/dir.h>
36	# endif
37	# ifdef HAVE_NDIR_H
38	# include <ndir.h>
39	# endif
40	# ifdef HAVE_VMSDIR_H
41	# include "vmsdir.h"
42	# endif /* HAVE_VMSDIR_H */
43	#endif
44	/* bird: FreeBSD + smbfs -> readdir() + EBADF */
45	#ifdef __FreeBSD__
46	# include <sys/mount.h>
47	#endif
48	/* bird: end */
49
50	/* In GNU systems, <dirent.h> defines this macro for us. */
51	#ifdef _D_NAMLEN
52	# undef NAMLEN
53	# define NAMLEN(d) _D_NAMLEN(d)
54	#endif
55
56	#if (defined (POSIX) \|\| defined (VMS) \|\| defined (WINDOWS32)) && !defined (__GNU_LIBRARY__)
57	/* Posix does not require that the d_ino field be present, and some
58	systems do not provide it. */
59	# define REAL_DIR_ENTRY(dp) 1
60	# define FAKE_DIR_ENTRY(dp)
61	#else
62	# define REAL_DIR_ENTRY(dp) (dp->d_ino != 0)
63	# define FAKE_DIR_ENTRY(dp) (dp->d_ino = 1)
64	#endif /* POSIX */
65
66
67	#ifdef __MSDOS__
68	#include <ctype.h>
69	#include <fcntl.h>
70
71	/* If it's MSDOS that doesn't have _USE_LFN, disable LFN support. */
72	#ifndef _USE_LFN
73	#define _USE_LFN 0
74	#endif
75
76	static const char *
77	dosify (const char *filename)
78	{
79	static char dos_filename[14];
80	char *df;
81	int i;
82
83	if (filename == 0 \|\| _USE_LFN)
84	return filename;
85
86	/* FIXME: what about filenames which violate
87	8+3 constraints, like "config.h.in", or ".emacs"? */
88	if (strpbrk (filename, "\"*+,;<=>?[\\]\|") != 0)
89	return filename;
90
91	df = dos_filename;
92
93	/* First, transform the name part. */
94	for (i = 0; filename != '\0' && i < 8 && filename != '.'; ++i)
95	df++ = tolower ((unsigned char)filename++);
96
97	/* Now skip to the next dot. */
98	while (filename != '\0' && filename != '.')
99	++filename;
100	if (*filename != '\0')
101	{
102	df++ = filename++;
103	for (i = 0; filename != '\0' && i < 3 && filename != '.'; ++i)
104	df++ = tolower ((unsigned char)filename++);
105	}
106
107	/* Look for more dots. */
108	while (filename != '\0' && filename != '.')
109	++filename;
110	if (*filename == '.')
111	return filename;
112	*df = 0;
113	return dos_filename;
114	}
115	#endif /* __MSDOS__ */
116
117	#ifdef WINDOWS32
118	#include "pathstuff.h"
119	#endif
120
121	#ifdef _AMIGA
122	#include <ctype.h>
123	#endif
124
125	#ifdef HAVE_CASE_INSENSITIVE_FS
126	static const char *
127	downcase (const char *filename)
128	{
129	static PATH_VAR (new_filename);
130	char *df;
131	int i;
132
133	if (filename == 0)
134	return 0;
135
136	df = new_filename;
137
138	/* First, transform the name part. */
139	while (*filename != '\0')
140	{
141	df++ = tolower ((unsigned char)filename);
142	++filename;
143	}
144
145	*df = 0;
146
147	return new_filename;
148	}
149	#endif /* HAVE_CASE_INSENSITIVE_FS */
150
151	#ifdef VMS
152
153	static int
154	vms_hash (char *name)
155	{
156	int h = 0;
157	int g;
158
159	while (*name)
160	{
161	unsigned char uc = *name;
162	#ifdef HAVE_CASE_INSENSITIVE_FS
163	h = (h << 4) + (isupper (uc) ? tolower (uc) : uc);
164	#else
165	h = (h << 4) + uc;
166	#endif
167	name++;
168	g = h & 0xf0000000;
169	if (g)
170	{
171	h = h ^ (g >> 24);
172	h = h ^ g;
173	}
174	}
175	return h;
176	}
177
178	/* fake stat entry for a directory */
179	static int
180	vmsstat_dir (char name, struct stat st)
181	{
182	char *s;
183	int h;
184	DIR *dir;
185
186	dir = opendir (name);
187	if (dir == 0)
188	return -1;
189	closedir (dir);
190	s = strchr (name, ':'); /* find device */
191	if (s)
192	{
193	*s++ = 0;
194	st->st_dev = (char *)vms_hash (name);
195	h = vms_hash (s);
196	*(s-1) = ':';
197	}
198	else
199	{
200	st->st_dev = 0;
201	s = name;
202	h = vms_hash (s);
203	}
204
205	st->st_ino[0] = h & 0xff;
206	st->st_ino[1] = h & 0xff00;
207	st->st_ino[2] = h >> 16;
208
209	return 0;
210	}
211	#endif /* VMS */
212
213
214	/* Hash table of directories. */
215
216	#ifndef DIRECTORY_BUCKETS
217	#ifdef KMK
218	# define DIRECTORY_BUCKETS 4096
219	# else
220	#define DIRECTORY_BUCKETS 199
221	# endif
222	#endif
223
224	struct directory_contents
225	{
226	dev_t dev; /* Device and inode numbers of this dir. */
227	#ifdef WINDOWS32
228	/* Inode means nothing on WINDOWS32. Even file key information is
229	* unreliable because it is random per file open and undefined for remote
230	* filesystems. The most unique attribute I can come up with is the fully
231	* qualified name of the directory. Beware though, this is also
232	* unreliable. I'm open to suggestion on a better way to emulate inode. */
233	char *path_key;
234	int ctime;
235	int mtime; /* controls check for stale directory cache */
236	int fs_flags; /* FS_FAT, FS_NTFS, ... */
237	# define FS_FAT 0x1
238	# define FS_NTFS 0x2
239	# define FS_UNKNOWN 0x4
240	#else
241	# ifdef VMS
242	ino_t ino[3];
243	# else
244	ino_t ino;
245	# endif
246	#endif /* WINDOWS32 */
247	struct hash_table dirfiles; /* Files in this directory. */
248	DIR dirstream; / Stream reading this directory. */
249	};
250
251	static unsigned long
252	directory_contents_hash_1 (const void *key_0)
253	{
254	const struct directory_contents *key = key_0;
255	unsigned long hash;
256
257	#ifdef WINDOWS32
258	hash = 0;
259	ISTRING_HASH_1 (key->path_key, hash);
260	hash ^= ((unsigned int) key->dev << 4) ^ (unsigned int) key->ctime;
261	#else
262	# ifdef VMS
263	hash = (((unsigned int) key->dev << 4)
264	^ ((unsigned int) key->ino[0]
265	+ (unsigned int) key->ino[1]
266	+ (unsigned int) key->ino[2]));
267	# else
268	hash = ((unsigned int) key->dev << 4) ^ (unsigned int) key->ino;
269	# endif
270	#endif /* WINDOWS32 */
271	return hash;
272	}
273
274	static unsigned long
275	directory_contents_hash_2 (const void *key_0)
276	{
277	const struct directory_contents *key = key_0;
278	unsigned long hash;
279
280	#ifdef WINDOWS32
281	hash = 0;
282	ISTRING_HASH_2 (key->path_key, hash);
283	hash ^= ((unsigned int) key->dev << 4) ^ (unsigned int) ~key->ctime;
284	#else
285	# ifdef VMS
286	hash = (((unsigned int) key->dev << 4)
287	^ ~((unsigned int) key->ino[0]
288	+ (unsigned int) key->ino[1]
289	+ (unsigned int) key->ino[2]));
290	# else
291	hash = ((unsigned int) key->dev << 4) ^ (unsigned int) ~key->ino;
292	# endif
293	#endif /* WINDOWS32 */
294
295	return hash;
296	}
297
298	/* Sometimes it's OK to use subtraction to get this value:
299	result = X - Y;
300	But, if we're not sure of the type of X and Y they may be too large for an
301	int (on a 64-bit system for example). So, use ?: instead.
302	See Savannah bug #15534.
303
304	NOTE! This macro has side-effects!
305	*/
306
307	#define MAKECMP(_x,_y) ((_x)<(_y)?-1:((_x)==(_y)?0:1))
308
309	static int
310	directory_contents_hash_cmp (const void xv, const void yv)
311	{
312	const struct directory_contents *x = xv;
313	const struct directory_contents *y = yv;
314	int result;
315
316	#ifdef WINDOWS32
317	ISTRING_COMPARE (x->path_key, y->path_key, result);
318	if (result)
319	return result;
320	result = MAKECMP(x->ctime, y->ctime);
321	if (result)
322	return result;
323	#else
324	# ifdef VMS
325	result = MAKECMP(x->ino[0], y->ino[0]);
326	if (result)
327	return result;
328	result = MAKECMP(x->ino[1], y->ino[1]);
329	if (result)
330	return result;
331	result = MAKECMP(x->ino[2], y->ino[2]);
332	if (result)
333	return result;
334	# else
335	result = MAKECMP(x->ino, y->ino);
336	if (result)
337	return result;
338	# endif
339	#endif /* WINDOWS32 */
340
341	return MAKECMP(x->dev, y->dev);
342	}
343
344	/* Table of directory contents hashed by device and inode number. */
345	static struct hash_table directory_contents;
346
347	struct directory
348	{
349	const char name; / Name of the directory. */
350
351	/* The directory's contents. This data may be shared by several
352	entries in the hash table, which refer to the same directory
353	(identified uniquely by `dev' and `ino') under different names. */
354	struct directory_contents *contents;
355	};
356
357	static unsigned long
358	directory_hash_1 (const void *key)
359	{
360	return_ISTRING_HASH_1 (((const struct directory *) key)->name);
361	}
362
363	static unsigned long
364	directory_hash_2 (const void *key)
365	{
366	return_ISTRING_HASH_2 (((const struct directory *) key)->name);
367	}
368
369	static int
370	directory_hash_cmp (const void x, const void y)
371	{
372	return_ISTRING_COMPARE (((const struct directory *) x)->name,
373	((const struct directory *) y)->name);
374	}
375
376	/* Table of directories hashed by name. */
377	static struct hash_table directories;
378
379	/* Never have more than this many directories open at once. */
380
381	#define MAX_OPEN_DIRECTORIES 10
382
383	static unsigned int open_directories = 0;
384
385
386	/* Hash table of files in each directory. */
387
388	struct dirfile
389	{
390	const char name; / Name of the file. */
391	short length;
392	short impossible; /* This file is impossible. */
393	};
394
395	static unsigned long
396	dirfile_hash_1 (const void *key)
397	{
398	return_ISTRING_HASH_1 (((struct dirfile const *) key)->name);
399	}
400
401	static unsigned long
402	dirfile_hash_2 (const void *key)
403	{
404	return_ISTRING_HASH_2 (((struct dirfile const *) key)->name);
405	}
406
407	static int
408	dirfile_hash_cmp (const void xv, const void yv)
409	{
410	const struct dirfile *x = xv;
411	const struct dirfile *y = yv;
412	int result = x->length - y->length;
413	if (result)
414	return result;
415	return_ISTRING_COMPARE (x->name, y->name);
416	}
417
418	#ifndef DIRFILE_BUCKETS
419	#define DIRFILE_BUCKETS 107
420	#endif
421
422
423	static int dir_contents_file_exists_p (struct directory_contents *dir,
424	const char *filename);
425	static struct directory find_directory (const char name);
426
427	/* Find the directory named NAME and return its `struct directory'. */
428
429	static struct directory *
430	find_directory (const char *name)
431	{
432	const char *p;
433	struct directory *dir;
434	struct directory **dir_slot;
435	struct directory dir_key;
436	int r;
437	#ifdef WINDOWS32
438	char* w32_path;
439	char fs_label[BUFSIZ];
440	char fs_type[BUFSIZ];
441	unsigned long fs_serno;
442	unsigned long fs_flags;
443	unsigned long fs_len;
444	#endif
445	#ifdef VMS
446	if ((name == '.') && ((name+1) == 0))
447	name = "[]";
448	else
449	name = vmsify (name,1);
450	#endif
451
452	dir_key.name = name;
453	dir_slot = (struct directory **) hash_find_slot (&directories, &dir_key);
454	dir = *dir_slot;
455
456	if (HASH_VACANT (dir))
457	{
458	struct stat st;
459
460	/* The directory was not found. Create a new entry for it. */
461
462	p = name + strlen (name);
463	dir = xmalloc (sizeof (struct directory));
464	dir->name = strcache_add_len (name, p - name);
465	hash_insert_at (&directories, dir, dir_slot);
466	/* The directory is not in the name hash table.
467	Find its device and inode numbers, and look it up by them. */
468
469	#ifdef WINDOWS32
470	/* Remove any trailing '\'. Windows32 stat fails even on valid
471	directories if they end in '\'. */
472	if (p[-1] == '\\')
473	((char *)p)[-1] = '\0';
474	#endif
475
476	#ifdef VMS
477	r = vmsstat_dir (name, &st);
478	#else
479	EINTRLOOP (r, stat (name, &st));
480	#endif
481
482	#ifdef WINDOWS32
483	/* Put back the trailing '\'. If we don't, we're permanently
484	truncating the value! */
485	if (p[-1] == '\0')
486	((char *)p)[-1] = '\\';
487	#endif
488
489	if (r < 0)
490	{
491	/* Couldn't stat the directory. Mark this by
492	setting the `contents' member to a nil pointer. */
493	dir->contents = 0;
494	}
495	else
496	{
497	/* Search the contents hash table; device and inode are the key. */
498
499	struct directory_contents *dc;
500	struct directory_contents **dc_slot;
501	struct directory_contents dc_key;
502
503	dc_key.dev = st.st_dev;
504	#ifdef WINDOWS32
505	dc_key.path_key = w32_path = w32ify (name, 1);
506	dc_key.ctime = st.st_ctime;
507	#else
508	# ifdef VMS
509	dc_key.ino[0] = st.st_ino[0];
510	dc_key.ino[1] = st.st_ino[1];
511	dc_key.ino[2] = st.st_ino[2];
512	# else
513	dc_key.ino = st.st_ino;
514	# endif
515	#endif
516	dc_slot = (struct directory_contents **) hash_find_slot (&directory_contents, &dc_key);
517	dc = *dc_slot;
518
519	if (HASH_VACANT (dc))
520	{
521	/* Nope; this really is a directory we haven't seen before. */
522
523	dc = (struct directory_contents *)
524	xmalloc (sizeof (struct directory_contents));
525
526	/* Enter it in the contents hash table. */
527	dc->dev = st.st_dev;
528	#ifdef WINDOWS32
529	dc->path_key = xstrdup (w32_path);
530	dc->ctime = st.st_ctime;
531	dc->mtime = st.st_mtime;
532
533	/*
534	* NTFS is the only WINDOWS32 filesystem that bumps mtime
535	* on a directory when files are added/deleted from
536	* a directory.
537	*/
538	w32_path[3] = '\0';
539	if (GetVolumeInformation(w32_path,
540	fs_label, sizeof (fs_label),
541	&fs_serno, &fs_len,
542	&fs_flags, fs_type, sizeof (fs_type)) == FALSE)
543	dc->fs_flags = FS_UNKNOWN;
544	else if (!strcmp(fs_type, "FAT"))
545	dc->fs_flags = FS_FAT;
546	else if (!strcmp(fs_type, "NTFS"))
547	dc->fs_flags = FS_NTFS;
548	else
549	dc->fs_flags = FS_UNKNOWN;
550	#else
551	# ifdef VMS
552	dc->ino[0] = st.st_ino[0];
553	dc->ino[1] = st.st_ino[1];
554	dc->ino[2] = st.st_ino[2];
555	# else
556	dc->ino = st.st_ino;
557	# endif
558	#endif /* WINDOWS32 */
559	hash_insert_at (&directory_contents, dc, dc_slot);
560	ENULLLOOP (dc->dirstream, opendir (name));
561	if (dc->dirstream == 0)
562	/* Couldn't open the directory. Mark this by setting the
563	`files' member to a nil pointer. */
564	dc->dirfiles.ht_vec = 0;
565	else
566	{
567	hash_init (&dc->dirfiles, DIRFILE_BUCKETS,
568	dirfile_hash_1, dirfile_hash_2, dirfile_hash_cmp);
569	/* Keep track of how many directories are open. */
570	++open_directories;
571	if (open_directories == MAX_OPEN_DIRECTORIES)
572	/* We have too many directories open already.
573	Read the entire directory and then close it. */
574	dir_contents_file_exists_p (dc, 0);
575	}
576	}
577
578	/* Point the name-hashed entry for DIR at its contents data. */
579	dir->contents = dc;
580	}
581	}
582
583	return dir;
584	}
585
586
587	/* Return 1 if the name FILENAME is entered in DIR's hash table.
588	FILENAME must contain no slashes. */
589
590	static int
591	dir_contents_file_exists_p (struct directory_contents *dir,
592	const char *filename)
593	{
594	unsigned int hash;
595	struct dirfile *df;
596	struct dirent *d;
597	#ifdef WINDOWS32
598	struct stat st;
599	int rehash = 0;
600	#endif
601
602	if (dir == 0 \|\| dir->dirfiles.ht_vec == 0)
603	/* The directory could not be stat'd or opened. */
604	return 0;
605
606	#ifdef __MSDOS__
607	filename = dosify (filename);
608	#endif
609
610	#ifdef HAVE_CASE_INSENSITIVE_FS
611	filename = downcase (filename);
612	#endif
613
614	#ifdef __EMX__
615	if (filename != 0)
616	_fnlwr (filename); /* lower case for FAT drives */
617	#endif
618
619	#ifdef VMS
620	filename = vmsify (filename,0);
621	#endif
622
623	hash = 0;
624	if (filename != 0)
625	{
626	struct dirfile dirfile_key;
627
628	if (*filename == '\0')
629	{
630	/* Checking if the directory exists. */
631	return 1;
632	}
633	dirfile_key.name = filename;
634	dirfile_key.length = strlen (filename);
635	df = hash_find_item (&dir->dirfiles, &dirfile_key);
636	if (df)
637	return !df->impossible;
638	}
639
640	/* The file was not found in the hashed list.
641	Try to read the directory further. */
642
643	if (dir->dirstream == 0)
644	{
645	#ifdef WINDOWS32
646	/*
647	* Check to see if directory has changed since last read. FAT
648	* filesystems force a rehash always as mtime does not change
649	* on directories (ugh!).
650	*/
651	if (dir->path_key)
652	{
653	if ((dir->fs_flags & FS_FAT) != 0)
654	{
655	dir->mtime = time ((time_t *) 0);
656	rehash = 1;
657	}
658	else if (stat (dir->path_key, &st) == 0 && st.st_mtime > dir->mtime)
659	{
660	/* reset date stamp to show most recent re-process. */
661	dir->mtime = st.st_mtime;
662	rehash = 1;
663	}
664
665	/* If it has been already read in, all done. */
666	if (!rehash)
667	return 0;
668
669	/* make sure directory can still be opened; if not return. */
670	dir->dirstream = opendir (dir->path_key);
671	if (!dir->dirstream)
672	return 0;
673	}
674	else
675	#endif
676	/* The directory has been all read in. */
677	return 0;
678	}
679
680	while (1)
681	{
682	/* Enter the file in the hash table. */
683	unsigned int len;
684	struct dirfile dirfile_key;
685	struct dirfile **dirfile_slot;
686
687	ENULLLOOP (d, readdir (dir->dirstream));
688	if (d == 0)
689	{
690	/* bird: Workaround for smbfs mounts returning EBADF at the end of the search.
691	To exactly determin the cause here, I should probably do some smbfs
692	tracing, but for now just ignoring the EBADF on seems to work.
693	(The smb server is 64-bit vista, btw.) */
694	#if defined (__FreeBSD__)
695	struct statfs stfs;
696	int saved_errno = errno;
697	errno = 0;
698	if (saved_errno == EBADF
699	&& !fstatfs (dirfd (dir->dirstream), &stfs)
700	&& !(stfs.f_flags & MNT_LOCAL)
701	&& !strcmp(stfs.f_fstypename, "smbfs"))
702	{
703	/*fprintf (stderr, "EBADF on remote fs! dirfd=%d errno=%d\n",
704	dirfd (dir->dirstream), errno);*/
705	saved_errno = 0;
706	}
707	errno = saved_errno;
708	#endif
709	/* bird: end */
710	if (errno)
711	fatal (NILF, "INTERNAL: readdir(%p): %s (filename=%s)\n", dir, strerror (errno), filename);
712	break;
713	}
714
715	#if defined(VMS) && defined(HAVE_DIRENT_H)
716	/* In VMS we get file versions too, which have to be stripped off */
717	{
718	char *p = strrchr (d->d_name, ';');
719	if (p)
720	*p = '\0';
721	}
722	#endif
723	if (!REAL_DIR_ENTRY (d))
724	continue;
725
726	len = NAMLEN (d);
727	dirfile_key.name = d->d_name;
728	dirfile_key.length = len;
729	dirfile_slot = (struct dirfile **) hash_find_slot (&dir->dirfiles, &dirfile_key);
730	#ifdef WINDOWS32
731	/*
732	* If re-reading a directory, don't cache files that have
733	* already been discovered.
734	*/
735	if (! rehash \|\| HASH_VACANT (*dirfile_slot))
736	#endif
737	{
738	df = xmalloc (sizeof (struct dirfile));
739	df->name = strcache_add_len (d->d_name, len);
740	df->length = len;
741	df->impossible = 0;
742	hash_insert_at (&dir->dirfiles, df, dirfile_slot);
743	}
744	/* Check if the name matches the one we're searching for. */
745	if (filename != 0 && strieq (d->d_name, filename))
746	return 1;
747	}
748
749	/* If the directory has been completely read in,
750	close the stream and reset the pointer to nil. */
751	if (d == 0)
752	{
753	--open_directories;
754	closedir (dir->dirstream);
755	dir->dirstream = 0;
756	}
757	return 0;
758	}
759
760	/* Return 1 if the name FILENAME in directory DIRNAME
761	is entered in the dir hash table.
762	FILENAME must contain no slashes. */
763
764	int
765	dir_file_exists_p (const char dirname, const char filename)
766	{
767	return dir_contents_file_exists_p (find_directory (dirname)->contents,
768	filename);
769	}
770
771
772	/* Return 1 if the file named NAME exists. */
773
774	int
775	file_exists_p (const char *name)
776	{
777	const char *dirend;
778	const char *dirname;
779	const char *slash;
780
781	#ifndef NO_ARCHIVES
782	if (ar_name (name))
783	return ar_member_date (name) != (time_t) -1;
784	#endif
785
786	#ifdef VMS
787	dirend = strrchr (name, ']');
788	if (dirend == 0)
789	dirend = strrchr (name, ':');
790	if (dirend == 0)
791	return dir_file_exists_p ("[]", name);
792	#else /* !VMS */
793	dirend = strrchr (name, '/');
794	#ifdef HAVE_DOS_PATHS
795	/* Forward and backslashes might be mixed. We need the rightmost one. */
796	{
797	const char *bslash = strrchr(name, '\\');
798	if (!dirend \|\| bslash > dirend)
799	dirend = bslash;
800	/* The case of "d:file". */
801	if (!dirend && name[0] && name[1] == ':')
802	dirend = name + 1;
803	}
804	#endif /* HAVE_DOS_PATHS */
805	if (dirend == 0)
806	#ifndef _AMIGA
807	return dir_file_exists_p (".", name);
808	#else /* !VMS && !AMIGA */
809	return dir_file_exists_p ("", name);
810	#endif /* AMIGA */
811	#endif /* VMS */
812
813	slash = dirend;
814	if (dirend == name)
815	dirname = "/";
816	else
817	{
818	char *p;
819	#ifdef HAVE_DOS_PATHS
820	/* d:/ and d: are very different... */
821	if (dirend < name + 3 && name[1] == ':' &&
822	(dirend == '/' \|\| dirend == '\\' \|\| *dirend == ':'))
823	dirend++;
824	#endif
825	p = alloca (dirend - name + 1);
826	memcpy (p, name, dirend - name);
827	p[dirend - name] = '\0';
828	dirname = p;
829	}
830	return dir_file_exists_p (dirname, slash + 1);
831	}
832
833
834	/* Mark FILENAME as `impossible' for `file_impossible_p'.
835	This means an attempt has been made to search for FILENAME
836	as an intermediate file, and it has failed. */
837
838	void
839	file_impossible (const char *filename)
840	{
841	const char *dirend;
842	const char *p = filename;
843	struct directory *dir;
844	struct dirfile *new;
845
846	#ifdef VMS
847	dirend = strrchr (p, ']');
848	if (dirend == 0)
849	dirend = strrchr (p, ':');
850	dirend++;
851	if (dirend == (char *)1)
852	dir = find_directory ("[]");
853	#else
854	dirend = strrchr (p, '/');
855	# ifdef HAVE_DOS_PATHS
856	/* Forward and backslashes might be mixed. We need the rightmost one. */
857	{
858	const char *bslash = strrchr(p, '\\');
859	if (!dirend \|\| bslash > dirend)
860	dirend = bslash;
861	/* The case of "d:file". */
862	if (!dirend && p[0] && p[1] == ':')
863	dirend = p + 1;
864	}
865	# endif /* HAVE_DOS_PATHS */
866	if (dirend == 0)
867	# ifdef _AMIGA
868	dir = find_directory ("");
869	# else /* !VMS && !AMIGA */
870	dir = find_directory (".");
871	# endif /* AMIGA */
872	#endif /* VMS */
873	else
874	{
875	const char *dirname;
876	const char *slash = dirend;
877	if (dirend == p)
878	dirname = "/";
879	else
880	{
881	char *cp;
882	#ifdef HAVE_DOS_PATHS
883	/* d:/ and d: are very different... */
884	if (dirend < p + 3 && p[1] == ':' &&
885	(dirend == '/' \|\| dirend == '\\' \|\| *dirend == ':'))
886	dirend++;
887	#endif
888	cp = alloca (dirend - p + 1);
889	memcpy (cp, p, dirend - p);
890	cp[dirend - p] = '\0';
891	dirname = cp;
892	}
893	dir = find_directory (dirname);
894	filename = p = slash + 1;
895	}
896
897	if (dir->contents == 0)
898	{
899	/* The directory could not be stat'd. We allocate a contents
900	structure for it, but leave it out of the contents hash table. */
901	dir->contents = xmalloc (sizeof (struct directory_contents));
902	memset (dir->contents, '\0', sizeof (struct directory_contents));
903	}
904
905	if (dir->contents->dirfiles.ht_vec == 0)
906	{
907	hash_init (&dir->contents->dirfiles, DIRFILE_BUCKETS,
908	dirfile_hash_1, dirfile_hash_2, dirfile_hash_cmp);
909	}
910
911	/* Make a new entry and put it in the table. */
912
913	new = xmalloc (sizeof (struct dirfile));
914	new->length = strlen (filename);
915	new->name = strcache_add_len (filename, new->length);
916	new->impossible = 1;
917	hash_insert (&dir->contents->dirfiles, new);
918	}
919
920
921	/* Return nonzero if FILENAME has been marked impossible. */
922
923	int
924	file_impossible_p (const char *filename)
925	{
926	const char *dirend;
927	const char *p = filename;
928	struct directory_contents *dir;
929	struct dirfile *dirfile;
930	struct dirfile dirfile_key;
931
932	#ifdef VMS
933	dirend = strrchr (filename, ']');
934	if (dirend == 0)
935	dir = find_directory ("[]")->contents;
936	#else
937	dirend = strrchr (filename, '/');
938	#ifdef HAVE_DOS_PATHS
939	/* Forward and backslashes might be mixed. We need the rightmost one. */
940	{
941	const char *bslash = strrchr(filename, '\\');
942	if (!dirend \|\| bslash > dirend)
943	dirend = bslash;
944	/* The case of "d:file". */
945	if (!dirend && filename[0] && filename[1] == ':')
946	dirend = filename + 1;
947	}
948	#endif /* HAVE_DOS_PATHS */
949	if (dirend == 0)
950	#ifdef _AMIGA
951	dir = find_directory ("")->contents;
952	#else /* !VMS && !AMIGA */
953	dir = find_directory (".")->contents;
954	#endif /* AMIGA */
955	#endif /* VMS */
956	else
957	{
958	const char *dirname;
959	const char *slash = dirend;
960	if (dirend == filename)
961	dirname = "/";
962	else
963	{
964	char *cp;
965	#ifdef HAVE_DOS_PATHS
966	/* d:/ and d: are very different... */
967	if (dirend < filename + 3 && filename[1] == ':' &&
968	(dirend == '/' \|\| dirend == '\\' \|\| *dirend == ':'))
969	dirend++;
970	#endif
971	cp = alloca (dirend - filename + 1);
972	memcpy (cp, p, dirend - p);
973	cp[dirend - p] = '\0';
974	dirname = cp;
975	}
976	dir = find_directory (dirname)->contents;
977	p = filename = slash + 1;
978	}
979
980	if (dir == 0 \|\| dir->dirfiles.ht_vec == 0)
981	/* There are no files entered for this directory. */
982	return 0;
983
984	#ifdef __MSDOS__
985	filename = dosify (p);
986	#endif
987	#ifdef HAVE_CASE_INSENSITIVE_FS
988	filename = downcase (p);
989	#endif
990	#ifdef VMS
991	filename = vmsify (p, 1);
992	#endif
993
994	dirfile_key.name = filename;
995	dirfile_key.length = strlen (filename);
996	dirfile = hash_find_item (&dir->dirfiles, &dirfile_key);
997	if (dirfile)
998	return dirfile->impossible;
999
1000	return 0;
1001	}
1002
1003
1004	/* Return the already allocated name in the
1005	directory hash table that matches DIR. */
1006
1007	const char *
1008	dir_name (const char *dir)
1009	{
1010	return find_directory (dir)->name;
1011	}
1012
1013
1014	/* Print the data base of directories. */
1015
1016	void
1017	print_dir_data_base (void)
1018	{
1019	unsigned int files;
1020	unsigned int impossible;
1021	struct directory **dir_slot;
1022	struct directory **dir_end;
1023
1024	puts (_("\n# Directories\n"));
1025
1026	files = impossible = 0;
1027
1028	dir_slot = (struct directory **) directories.ht_vec;
1029	dir_end = dir_slot + directories.ht_size;
1030	for ( ; dir_slot < dir_end; dir_slot++)
1031	{
1032	struct directory dir = dir_slot;
1033	if (! HASH_VACANT (dir))
1034	{
1035	if (dir->contents == 0)
1036	printf (_("# %s: could not be stat'd.\n"), dir->name);
1037	else if (dir->contents->dirfiles.ht_vec == 0)
1038	{
1039	#ifdef WINDOWS32
1040	printf (_("# %s (key %s, mtime %d): could not be opened.\n"),
1041	dir->name, dir->contents->path_key,dir->contents->mtime);
1042	#else /* WINDOWS32 */
1043	#ifdef VMS
1044	printf (_("# %s (device %d, inode [%d,%d,%d]): could not be opened.\n"),
1045	dir->name, dir->contents->dev,
1046	dir->contents->ino[0], dir->contents->ino[1],
1047	dir->contents->ino[2]);
1048	#else
1049	printf (_("# %s (device %ld, inode %ld): could not be opened.\n"),
1050	dir->name, (long int) dir->contents->dev,
1051	(long int) dir->contents->ino);
1052	#endif
1053	#endif /* WINDOWS32 */
1054	}
1055	else
1056	{
1057	unsigned int f = 0;
1058	unsigned int im = 0;
1059	struct dirfile **files_slot;
1060	struct dirfile **files_end;
1061
1062	files_slot = (struct dirfile **) dir->contents->dirfiles.ht_vec;
1063	files_end = files_slot + dir->contents->dirfiles.ht_size;
1064	for ( ; files_slot < files_end; files_slot++)
1065	{
1066	struct dirfile df = files_slot;
1067	if (! HASH_VACANT (df))
1068	{
1069	if (df->impossible)
1070	++im;
1071	else
1072	++f;
1073	}
1074	}
1075	#ifdef WINDOWS32
1076	printf (_("# %s (key %s, mtime %d): "),
1077	dir->name, dir->contents->path_key, dir->contents->mtime);
1078	#else /* WINDOWS32 */
1079	#ifdef VMS
1080	printf (_("# %s (device %d, inode [%d,%d,%d]): "),
1081	dir->name, dir->contents->dev,
1082	dir->contents->ino[0], dir->contents->ino[1],
1083	dir->contents->ino[2]);
1084	#else
1085	printf (_("# %s (device %ld, inode %ld): "),
1086	dir->name,
1087	(long)dir->contents->dev, (long)dir->contents->ino);
1088	#endif
1089	#endif /* WINDOWS32 */
1090	if (f == 0)
1091	fputs (_("No"), stdout);
1092	else
1093	printf ("%u", f);
1094	fputs (_(" files, "), stdout);
1095	if (im == 0)
1096	fputs (_("no"), stdout);
1097	else
1098	printf ("%u", im);
1099	fputs (_(" impossibilities"), stdout);
1100	if (dir->contents->dirstream == 0)
1101	puts (".");
1102	else
1103	puts (_(" so far."));
1104	files += f;
1105	impossible += im;
1106
1107	#ifdef KMK
1108	fputs ("# ", stdout);
1109	hash_print_stats (&dir->contents->dirfiles, stdout);
1110	fputs ("\n", stdout);
1111	#endif
1112	}
1113	}
1114	}
1115
1116	fputs ("\n# ", stdout);
1117	if (files == 0)
1118	fputs (_("No"), stdout);
1119	else
1120	printf ("%u", files);
1121	fputs (_(" files, "), stdout);
1122	if (impossible == 0)
1123	fputs (_("no"), stdout);
1124	else
1125	printf ("%u", impossible);
1126	printf (_(" impossibilities in %lu directories.\n"), directories.ht_fill);
1127	#ifdef KMK
1128	fputs ("# directories: ", stdout);
1129	hash_print_stats (&directories, stdout);
1130	fputs ("\n# directory_contents: ", stdout);
1131	hash_print_stats (&directory_contents, stdout);
1132	fputs ("\n", stdout);
1133	#endif
1134	}
1135
1136
1137	/* Hooks for globbing. */
1138
1139	#include <glob.h>
1140
1141	/* Structure describing state of iterating through a directory hash table. */
1142
1143	struct dirstream
1144	{
1145	struct directory_contents contents; / The directory being read. */
1146	struct dirfile *dirfile_slot; / Current slot in table. */
1147	};
1148
1149	/* Forward declarations. */
1150	static __ptr_t open_dirstream (const char *);
1151	static struct dirent *read_dirstream (__ptr_t);
1152
1153	static __ptr_t
1154	open_dirstream (const char *directory)
1155	{
1156	struct dirstream *new;
1157	struct directory *dir = find_directory (directory);
1158
1159	if (dir->contents == 0 \|\| dir->contents->dirfiles.ht_vec == 0)
1160	/* DIR->contents is nil if the directory could not be stat'd.
1161	DIR->contents->dirfiles is nil if it could not be opened. */
1162	return 0;
1163
1164	/* Read all the contents of the directory now. There is no benefit
1165	in being lazy, since glob will want to see every file anyway. */
1166
1167	dir_contents_file_exists_p (dir->contents, 0);
1168
1169	new = xmalloc (sizeof (struct dirstream));
1170	new->contents = dir->contents;
1171	new->dirfile_slot = (struct dirfile **) new->contents->dirfiles.ht_vec;
1172
1173	return (__ptr_t) new;
1174	}
1175
1176	static struct dirent *
1177	read_dirstream (__ptr_t stream)
1178	{
1179	static char *buf;
1180	static unsigned int bufsz;
1181
1182	struct dirstream const ds = (struct dirstream ) stream;
1183	struct directory_contents *dc = ds->contents;
1184	struct dirfile dirfile_end = (struct dirfile ) dc->dirfiles.ht_vec + dc->dirfiles.ht_size;
1185
1186	while (ds->dirfile_slot < dirfile_end)
1187	{
1188	struct dirfile df = ds->dirfile_slot++;
1189	if (! HASH_VACANT (df) && !df->impossible)
1190	{
1191	/* The glob interface wants a `struct dirent', so mock one up. */
1192	struct dirent *d;
1193	unsigned int len = df->length + 1;
1194	unsigned int sz = sizeof (*d) - sizeof (d->d_name) + len;
1195	if (sz > bufsz)
1196	{
1197	bufsz *= 2;
1198	if (sz > bufsz)
1199	bufsz = sz;
1200	buf = xrealloc (buf, bufsz);
1201	}
1202	d = (struct dirent *) buf;
1203	#ifdef __MINGW32__
1204	# if __MINGW32_MAJOR_VERSION < 3 \|\| (__MINGW32_MAJOR_VERSION == 3 && \
1205	__MINGW32_MINOR_VERSION == 0)
1206	d->d_name = xmalloc(len);
1207	# endif
1208	#endif
1209	FAKE_DIR_ENTRY (d);
1210	#ifdef _DIRENT_HAVE_D_NAMLEN
1211	d->d_namlen = len - 1;
1212	#endif
1213	#ifdef _DIRENT_HAVE_D_TYPE
1214	d->d_type = DT_UNKNOWN;
1215	#endif
1216	memcpy (d->d_name, df->name, len);
1217	return d;
1218	}
1219	}
1220
1221	return 0;
1222	}
1223
1224	static void
1225	ansi_free (void *p)
1226	{
1227	if (p)
1228	free(p);
1229	}
1230
1231	/* On 64 bit ReliantUNIX (5.44 and above) in LFS mode, stat() is actually a
1232	* macro for stat64(). If stat is a macro, make a local wrapper function to
1233	* invoke it.
1234	*/
1235	#ifndef stat
1236	# ifndef VMS
1237	int stat (const char path, struct stat sbuf);
1238	# endif
1239	# define local_stat stat
1240	#else
1241	static int
1242	local_stat (const char path, struct stat buf)
1243	{
1244	int e;
1245
1246	EINTRLOOP (e, stat (path, buf));
1247	return e;
1248	}
1249	#endif
1250
1251	void
1252	dir_setup_glob (glob_t *gl)
1253	{
1254	gl->gl_opendir = open_dirstream;
1255	gl->gl_readdir = read_dirstream;
1256	gl->gl_closedir = ansi_free;
1257	gl->gl_stat = local_stat;
1258	#ifdef __EMX__ /* The FreeBSD implemenation actually uses gl_lstat!! */
1259	gl->gl_lstat = local_stat;
1260	#endif
1261	/* We don't bother setting gl_lstat, since glob never calls it.
1262	The slot is only there for compatibility with 4.4 BSD. */
1263	}
1264
1265	void
1266	hash_init_directories (void)
1267	{
1268	hash_init (&directories, DIRECTORY_BUCKETS,
1269	directory_hash_1, directory_hash_2, directory_hash_cmp);
1270	hash_init (&directory_contents, DIRECTORY_BUCKETS,
1271	directory_contents_hash_1, directory_contents_hash_2,
1272	directory_contents_hash_cmp);
1273	}

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source: kBuild/trunk/src/kmk/dir.c@ 1450

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