summaryrefslogtreecommitdiffstats
path: root/unix/tclUnixFile.c
blob: d68bebd0d37a64922d4da01f9a74613fafdb83db (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
/* 
 * tclUnixFile.c --
 *
 *      This file contains wrappers around UNIX file handling functions.
 *      These wrappers mask differences between Windows and UNIX.
 *
 * Copyright (c) 1995-1998 Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclUnixFile.c,v 1.33 2003/10/13 16:48:07 vincentdarley Exp $
 */

#include "tclInt.h"
#include "tclPort.h"

static int NativeMatchType(CONST char* nativeName, Tcl_GlobTypeData *types);


/*
 *---------------------------------------------------------------------------
 *
 * TclpFindExecutable --
 *
 *	This procedure computes the absolute path name of the current
 *	application, given its argv[0] value.
 *
 * Results:
 *	A dirty UTF string that is the path to the executable.  At this
 *	point we may not know the system encoding.  Convert the native
 *	string value to UTF using the default encoding.  The assumption
 *	is that we will still be able to parse the path given the path
 *	name contains ASCII string and '/' chars do not conflict with
 *	other UTF chars.
 *
 * Side effects:
 *	The variable tclNativeExecutableName gets filled in with the file
 *	name for the application, if we figured it out.  If we couldn't
 *	figure it out, tclNativeExecutableName is set to NULL.
 *
 *---------------------------------------------------------------------------
 */

char *
TclpFindExecutable(argv0)
    CONST char *argv0;		/* The value of the application's argv[0]
				 * (native). */
{
    CONST char *name, *p;
    Tcl_StatBuf statBuf;
    int length;
    Tcl_DString buffer, nameString;

    if (argv0 == NULL) {
	return NULL;
    }
    if (tclNativeExecutableName != NULL) {
	return tclNativeExecutableName;
    }

    Tcl_DStringInit(&buffer);

    name = argv0;
    for (p = name; *p != '\0'; p++) {
	if (*p == '/') {
	    /*
	     * The name contains a slash, so use the name directly
	     * without doing a path search.
	     */

	    goto gotName;
	}
    }

    p = getenv("PATH");					/* INTL: Native. */
    if (p == NULL) {
	/*
	 * There's no PATH environment variable; use the default that
	 * is used by sh.
	 */

	p = ":/bin:/usr/bin";
    } else if (*p == '\0') {
	/*
	 * An empty path is equivalent to ".".
	 */

	p = "./";
    }

    /*
     * Search through all the directories named in the PATH variable
     * to see if argv[0] is in one of them.  If so, use that file
     * name.
     */

    while (1) {
	while (isspace(UCHAR(*p))) {		/* INTL: BUG */
	    p++;
	}
	name = p;
	while ((*p != ':') && (*p != 0)) {
	    p++;
	}
	Tcl_DStringSetLength(&buffer, 0);
	if (p != name) {
	    Tcl_DStringAppend(&buffer, name, p - name);
	    if (p[-1] != '/') {
		Tcl_DStringAppend(&buffer, "/", 1);
	    }
	}
	name = Tcl_DStringAppend(&buffer, argv0, -1);

	/*
	 * INTL: The following calls to access() and stat() should not be
	 * converted to Tclp routines because they need to operate on native
	 * strings directly.
	 */

	if ((access(name, X_OK) == 0)			/* INTL: Native. */
		&& (TclOSstat(name, &statBuf) == 0)	/* INTL: Native. */
		&& S_ISREG(statBuf.st_mode)) {
	    goto gotName;
	}
	if (*p == '\0') {
	    break;
	} else if (*(p+1) == 0) {
	    p = "./";
	} else {
	    p++;
	}
    }
    goto done;

    /*
     * If the name starts with "/" then just copy it to tclExecutableName.
     */

gotName:
#ifdef DJGPP
    if (name[1] == ':')  {
#else
    if (name[0] == '/')  {
#endif
	Tcl_ExternalToUtfDString(NULL, name, -1, &nameString);
	tclNativeExecutableName = (char *)
		ckalloc((unsigned) (Tcl_DStringLength(&nameString) + 1));
	strcpy(tclNativeExecutableName, Tcl_DStringValue(&nameString));
	Tcl_DStringFree(&nameString);
	goto done;
    }

    /*
     * The name is relative to the current working directory.  First
     * strip off a leading "./", if any, then add the full path name of
     * the current working directory.
     */

    if ((name[0] == '.') && (name[1] == '/')) {
	name += 2;
    }

    Tcl_ExternalToUtfDString(NULL, name, -1, &nameString);

    Tcl_DStringFree(&buffer);
    TclpGetCwd(NULL, &buffer);

    length = Tcl_DStringLength(&buffer) + Tcl_DStringLength(&nameString) + 2;
    tclNativeExecutableName = (char *) ckalloc((unsigned) length);
    strcpy(tclNativeExecutableName, Tcl_DStringValue(&buffer));
    tclNativeExecutableName[Tcl_DStringLength(&buffer)] = '/';
    strcpy(tclNativeExecutableName + Tcl_DStringLength(&buffer) + 1,
	    Tcl_DStringValue(&nameString));
    Tcl_DStringFree(&nameString);
    
done:
    Tcl_DStringFree(&buffer);
    return tclNativeExecutableName;
}

/*
 *----------------------------------------------------------------------
 *
 * TclpMatchInDirectory --
 *
 *	This routine is used by the globbing code to search a
 *	directory for all files which match a given pattern.
 *
 * Results: 
 *	The return value is a standard Tcl result indicating whether an
 *	error occurred in globbing.  Errors are left in interp, good
 *	results are lappended to resultPtr (which must be a valid object)
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------- */

int
TclpMatchInDirectory(interp, resultPtr, pathPtr, pattern, types)
    Tcl_Interp *interp;		/* Interpreter to receive errors. */
    Tcl_Obj *resultPtr;		/* List object to lappend results. */
    Tcl_Obj *pathPtr;	        /* Contains path to directory to search. */
    CONST char *pattern;	/* Pattern to match against. */
    Tcl_GlobTypeData *types;	/* Object containing list of acceptable types.
				 * May be NULL. In particular the directory
				 * flag is very important. */
{
    CONST char *native;
    Tcl_Obj *fileNamePtr;

    fileNamePtr = Tcl_FSGetTranslatedPath(interp, pathPtr);
    if (fileNamePtr == NULL) {
	return TCL_ERROR;
    }
    
    if (pattern == NULL || (*pattern == '\0')) {
	/* Match a file directly */
	native = (CONST char*) Tcl_FSGetNativePath(pathPtr);
	if (NativeMatchType(native, types)) {
	    Tcl_ListObjAppendElement(interp, resultPtr, pathPtr);
	}
	Tcl_DecrRefCount(fileNamePtr);
	return TCL_OK;
    } else {
	DIR *d;
	Tcl_DirEntry *entryPtr;
	CONST char *dirName;
	int dirLength;
	int matchHidden;
	int nativeDirLen;
	Tcl_StatBuf statBuf;
	Tcl_DString ds;      /* native encoding of dir */
	Tcl_DString dsOrig;  /* utf-8 encoding of dir */

	Tcl_DStringInit(&dsOrig);
	dirName = Tcl_GetStringFromObj(fileNamePtr, &dirLength);
	Tcl_DStringAppend(&dsOrig, dirName, dirLength);
	
	/*
	 * Make sure that the directory part of the name really is a
	 * directory.  If the directory name is "", use the name "."
	 * instead, because some UNIX systems don't treat "" like "."
	 * automatically.  Keep the "" for use in generating file names,
	 * otherwise "glob foo.c" would return "./foo.c".
	 */

	if (dirLength == 0) {
	    dirName = ".";
	} else {
	    dirName = Tcl_DStringValue(&dsOrig);
	    /* Make sure we have a trailing directory delimiter */
	    if (dirName[dirLength-1] != '/') {
		dirName = Tcl_DStringAppend(&dsOrig, "/", 1);
		dirLength++;
	    }
	}

	/*
	 * Now open the directory for reading and iterate over the contents.
	 */

	native = Tcl_UtfToExternalDString(NULL, dirName, -1, &ds);

	if ((TclOSstat(native, &statBuf) != 0)		/* INTL: Native. */
		|| !S_ISDIR(statBuf.st_mode)) {
	    Tcl_DStringFree(&dsOrig);
	    Tcl_DStringFree(&ds);
	    return TCL_OK;
	}

	d = opendir(native);				/* INTL: Native. */
	if (d == NULL) {
	    Tcl_DStringFree(&ds);
	    Tcl_ResetResult(interp);
	    Tcl_AppendResult(interp, "couldn't read directory \"",
		    Tcl_DStringValue(&dsOrig), "\": ",
		    Tcl_PosixError(interp), (char *) NULL);
	    Tcl_DStringFree(&dsOrig);
	    Tcl_DecrRefCount(fileNamePtr);
	    return TCL_ERROR;
	}

	nativeDirLen = Tcl_DStringLength(&ds);

	/*
	 * Check to see if -type or the pattern requests hidden files.
	 */
	matchHidden = ((types && (types->perm & TCL_GLOB_PERM_HIDDEN)) ||
		((pattern[0] == '.')
			|| ((pattern[0] == '\\') && (pattern[1] == '.'))));

	while ((entryPtr = TclOSreaddir(d)) != NULL) { /* INTL: Native. */
	    Tcl_DString utfDs;
	    CONST char *utfname;

	    /* 
	     * Skip this file if it doesn't agree with the hidden
	     * parameters requested by the user (via -type or pattern).
	     */
	    if (*entryPtr->d_name == '.') {
		if (!matchHidden) continue;
	    } else {
		if (matchHidden) continue;
	    }

	    /*
	     * Now check to see if the file matches, according to both type
	     * and pattern.  If so, add the file to the result.
	     */

	    utfname = Tcl_ExternalToUtfDString(NULL, entryPtr->d_name,
		    -1, &utfDs);
	    if (Tcl_StringCaseMatch(utfname, pattern, 0)) {
		int typeOk = 1;

		if (types != NULL) {
		    Tcl_DStringSetLength(&ds, nativeDirLen);
		    native = Tcl_DStringAppend(&ds, entryPtr->d_name, -1);
		    typeOk = NativeMatchType(native, types);
		}
		if (typeOk) {
		    Tcl_ListObjAppendElement(interp, resultPtr, 
			    TclNewFSPathObj(pathPtr, utfname,
				    Tcl_DStringLength(&utfDs)));
		}
	    }
	    Tcl_DStringFree(&utfDs);
	}

	closedir(d);
	Tcl_DStringFree(&ds);
	Tcl_DStringFree(&dsOrig);
	Tcl_DecrRefCount(fileNamePtr);
	return TCL_OK;
    }
}
static int 
NativeMatchType(
    CONST char* nativeEntry,  /* Native path to check */
    Tcl_GlobTypeData *types)  /* Type description to match against */
{
    Tcl_StatBuf buf;
    if (types == NULL) {
	/* 
	 * Simply check for the file's existence, but do it
	 * with lstat, in case it is a link to a file which
	 * doesn't exist (since that case would not show up
	 * if we used 'access' or 'stat')
	 */
	if (TclOSlstat(nativeEntry, &buf) != 0) {
	    return 0;
	}
    } else {
	if (types->perm != 0) {
	    if (TclOSstat(nativeEntry, &buf) != 0) {
		/* 
		 * Either the file has disappeared between the
		 * 'readdir' call and the 'stat' call, or
		 * the file is a link to a file which doesn't
		 * exist (which we could ascertain with
		 * lstat), or there is some other strange
		 * problem.  In all these cases, we define this
		 * to mean the file does not match any defined
		 * permission, and therefore it is not 
		 * added to the list of files to return.
		 */
		return 0;
	    }
	    
	    /* 
	     * readonly means that there are NO write permissions
	     * (even for user), but execute is OK for anybody
	     */
	    if (((types->perm & TCL_GLOB_PERM_RONLY) &&
			(buf.st_mode & (S_IWOTH|S_IWGRP|S_IWUSR))) ||
		((types->perm & TCL_GLOB_PERM_R) &&
			(access(nativeEntry, R_OK) != 0)) ||
		((types->perm & TCL_GLOB_PERM_W) &&
			(access(nativeEntry, W_OK) != 0)) ||
		((types->perm & TCL_GLOB_PERM_X) &&
			(access(nativeEntry, X_OK) != 0))
		) {
		return 0;
	    }
	}
	if (types->type != 0) {
	    if (types->perm == 0) {
		/* We haven't yet done a stat on the file */
		if (TclOSstat(nativeEntry, &buf) != 0) {
		    /* 
		     * Posix error occurred.  The only ok
		     * case is if this is a link to a nonexistent
		     * file, and the user did 'glob -l'. So
		     * we check that here:
		     */
		    if (types->type & TCL_GLOB_TYPE_LINK) {
			if (TclOSlstat(nativeEntry, &buf) == 0) {
			    if (S_ISLNK(buf.st_mode)) {
				return 1;
			    }
			}
		    }
		    return 0;
		}
	    }
	    /*
	     * In order bcdpfls as in 'find -t'
	     */
	    if (
		((types->type & TCL_GLOB_TYPE_BLOCK) &&
			S_ISBLK(buf.st_mode)) ||
		((types->type & TCL_GLOB_TYPE_CHAR) &&
			S_ISCHR(buf.st_mode)) ||
		((types->type & TCL_GLOB_TYPE_DIR) &&
			S_ISDIR(buf.st_mode)) ||
		((types->type & TCL_GLOB_TYPE_PIPE) &&
			S_ISFIFO(buf.st_mode)) ||
		((types->type & TCL_GLOB_TYPE_FILE) &&
			S_ISREG(buf.st_mode))
#ifdef S_ISSOCK
		|| ((types->type & TCL_GLOB_TYPE_SOCK) &&
			S_ISSOCK(buf.st_mode))
#endif /* S_ISSOCK */
		) {
		/* Do nothing -- this file is ok */
	    } else {
#ifdef S_ISLNK
		if (types->type & TCL_GLOB_TYPE_LINK) {
		    if (TclOSlstat(nativeEntry, &buf) == 0) {
			if (S_ISLNK(buf.st_mode)) {
			    return 1;
			}
		    }
		}
#endif /* S_ISLNK */
		return 0;
	    }
	}
    }
    return 1;
}

/*
 *---------------------------------------------------------------------------
 *
 * TclpGetUserHome --
 *
 *	This function takes the specified user name and finds their
 *	home directory.
 *
 * Results:
 *	The result is a pointer to a string specifying the user's home
 *	directory, or NULL if the user's home directory could not be
 *	determined.  Storage for the result string is allocated in
 *	bufferPtr; the caller must call Tcl_DStringFree() when the result
 *	is no longer needed.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

char *
TclpGetUserHome(name, bufferPtr)
    CONST char *name;		/* User name for desired home directory. */
    Tcl_DString *bufferPtr;	/* Uninitialized or free DString filled
				 * with name of user's home directory. */
{
    struct passwd *pwPtr;
    Tcl_DString ds;
    CONST char *native;

    native = Tcl_UtfToExternalDString(NULL, name, -1, &ds);
    pwPtr = getpwnam(native);				/* INTL: Native. */
    Tcl_DStringFree(&ds);
    
    if (pwPtr == NULL) {
	endpwent();
	return NULL;
    }
    Tcl_ExternalToUtfDString(NULL, pwPtr->pw_dir, -1, bufferPtr);
    endpwent();
    return Tcl_DStringValue(bufferPtr);
}

/*
 *---------------------------------------------------------------------------
 *
 * TclpObjAccess --
 *
 *	This function replaces the library version of access().
 *
 * Results:
 *	See access() documentation.
 *
 * Side effects:
 *	See access() documentation.
 *
 *---------------------------------------------------------------------------
 */

int 
TclpObjAccess(pathPtr, mode)
    Tcl_Obj *pathPtr;        /* Path of file to access */
    int mode;                /* Permission setting. */
{
    CONST char *path = Tcl_FSGetNativePath(pathPtr);
    if (path == NULL) {
	return -1;
    } else {
	return access(path, mode);
    }
}

/*
 *---------------------------------------------------------------------------
 *
 * TclpObjChdir --
 *
 *	This function replaces the library version of chdir().
 *
 * Results:
 *	See chdir() documentation.
 *
 * Side effects:
 *	See chdir() documentation.  
 *
 *---------------------------------------------------------------------------
 */

int 
TclpObjChdir(pathPtr)
    Tcl_Obj *pathPtr;          /* Path to new working directory */
{
    CONST char *path = Tcl_FSGetNativePath(pathPtr);
    if (path == NULL) {
	return -1;
    } else {
	return chdir(path);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TclpObjLstat --
 *
 *	This function replaces the library version of lstat().
 *
 * Results:
 *	See lstat() documentation.
 *
 * Side effects:
 *	See lstat() documentation.
 *
 *----------------------------------------------------------------------
 */

int 
TclpObjLstat(pathPtr, bufPtr)
    Tcl_Obj *pathPtr;		/* Path of file to stat */
    Tcl_StatBuf *bufPtr;	/* Filled with results of stat call. */
{
    return TclOSlstat(Tcl_FSGetNativePath(pathPtr), bufPtr);
}

/*
 *---------------------------------------------------------------------------
 *
 * TclpObjGetCwd --
 *
 *	This function replaces the library version of getcwd().
 *
 * Results:
 *	The result is a pointer to a string specifying the current
 *	directory, or NULL if the current directory could not be
 *	determined.  If NULL is returned, an error message is left in the
 *	interp's result.  Storage for the result string is allocated in
 *	bufferPtr; the caller must call Tcl_DStringFree() when the result
 *	is no longer needed.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

Tcl_Obj* 
TclpObjGetCwd(interp)
    Tcl_Interp *interp;
{
    Tcl_DString ds;
    if (TclpGetCwd(interp, &ds) != NULL) {
	Tcl_Obj *cwdPtr = Tcl_NewStringObj(Tcl_DStringValue(&ds), -1);
	Tcl_IncrRefCount(cwdPtr);
	Tcl_DStringFree(&ds);
	return cwdPtr;
    } else {
	return NULL;
    }
}

/* Older string based version */
CONST char *
TclpGetCwd(interp, bufferPtr)
    Tcl_Interp *interp;		/* If non-NULL, used for error reporting. */
    Tcl_DString *bufferPtr;	/* Uninitialized or free DString filled
				 * with name of current directory. */
{
    char buffer[MAXPATHLEN+1];

#ifdef USEGETWD
    if (getwd(buffer) == NULL) {			/* INTL: Native. */
#else
    if (getcwd(buffer, MAXPATHLEN + 1) == NULL) {	/* INTL: Native. */
#endif
	if (interp != NULL) {
	    Tcl_AppendResult(interp,
		    "error getting working directory name: ",
		    Tcl_PosixError(interp), (char *) NULL);
	}
	return NULL;
    }
    return Tcl_ExternalToUtfDString(NULL, buffer, -1, bufferPtr);
}

/*
 *---------------------------------------------------------------------------
 *
 * TclpReadlink --
 *
 *	This function replaces the library version of readlink().
 *
 * Results:
 *	The result is a pointer to a string specifying the contents
 *	of the symbolic link given by 'path', or NULL if the symbolic
 *	link could not be read.  Storage for the result string is
 *	allocated in bufferPtr; the caller must call Tcl_DStringFree()
 *	when the result is no longer needed.
 *
 * Side effects:
 *	See readlink() documentation.
 *
 *---------------------------------------------------------------------------
 */

char *
TclpReadlink(path, linkPtr)
    CONST char *path;		/* Path of file to readlink (UTF-8). */
    Tcl_DString *linkPtr;	/* Uninitialized or free DString filled
				 * with contents of link (UTF-8). */
{
#ifndef DJGPP
    char link[MAXPATHLEN];
    int length;
    CONST char *native;
    Tcl_DString ds;

    native = Tcl_UtfToExternalDString(NULL, path, -1, &ds);
    length = readlink(native, link, sizeof(link));	/* INTL: Native. */
    Tcl_DStringFree(&ds);
    
    if (length < 0) {
	return NULL;
    }

    Tcl_ExternalToUtfDString(NULL, link, length, linkPtr);
    return Tcl_DStringValue(linkPtr);
#else
    return NULL;
#endif
}

/*
 *----------------------------------------------------------------------
 *
 * TclpObjStat --
 *
 *	This function replaces the library version of stat().
 *
 * Results:
 *	See stat() documentation.
 *
 * Side effects:
 *	See stat() documentation.
 *
 *----------------------------------------------------------------------
 */

int 
TclpObjStat(pathPtr, bufPtr)
    Tcl_Obj *pathPtr;		/* Path of file to stat */
    Tcl_StatBuf *bufPtr;	/* Filled with results of stat call. */
{
    CONST char *path = Tcl_FSGetNativePath(pathPtr);
    if (path == NULL) {
	return -1;
    } else {
	return TclOSstat(path, bufPtr);
    }
}


#ifdef S_IFLNK

Tcl_Obj* 
TclpObjLink(pathPtr, toPtr, linkAction)
    Tcl_Obj *pathPtr;
    Tcl_Obj *toPtr;
    int linkAction;
{
    if (toPtr != NULL) {
	CONST char *src = Tcl_FSGetNativePath(pathPtr);
	CONST char *target = Tcl_FSGetNativePath(toPtr);
	
	if (src == NULL || target == NULL) {
	    return NULL;
	}
	if (access(src, F_OK) != -1) {
	    /* src exists */
	    errno = EEXIST;
	    return NULL;
	}
	if (access(target, F_OK) == -1) {
	    /* target doesn't exist */
	    errno = ENOENT;
	    return NULL;
	}
	/* 
	 * Check symbolic link flag first, since we prefer to
	 * create these.
	 */
	if (linkAction & TCL_CREATE_SYMBOLIC_LINK) {
	    if (symlink(target, src) != 0) return NULL;
	} else if (linkAction & TCL_CREATE_HARD_LINK) {
	    if (link(target, src) != 0) return NULL;
	} else {
	    errno = ENODEV;
	    return NULL;
	}
	return toPtr;
    } else {
	Tcl_Obj* linkPtr = NULL;

	char link[MAXPATHLEN];
	int length;
	Tcl_DString ds;
	Tcl_Obj *transPtr;
	
	transPtr = Tcl_FSGetTranslatedPath(NULL, pathPtr);
	if (transPtr == NULL) {
	    return NULL;
	}
	Tcl_DecrRefCount(transPtr);

	length = readlink(Tcl_FSGetNativePath(pathPtr), link, sizeof(link));
	if (length < 0) {
	    return NULL;
	}

	Tcl_ExternalToUtfDString(NULL, link, length, &ds);
	linkPtr = Tcl_NewStringObj(Tcl_DStringValue(&ds), 
				   Tcl_DStringLength(&ds));
	Tcl_DStringFree(&ds);
	if (linkPtr != NULL) {
	    Tcl_IncrRefCount(linkPtr);
	}
	return linkPtr;
    }
}

#endif


/*
 *---------------------------------------------------------------------------
 *
 * TclpFilesystemPathType --
 *
 *      This function is part of the native filesystem support, and
 *      returns the path type of the given path.  Right now it simply
 *      returns NULL.  In the future it could return specific path
 *      types, like 'nfs', 'samba', 'FAT32', etc.
 *
 * Results:
 *      NULL at present.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */
Tcl_Obj*
TclpFilesystemPathType(pathObjPtr)
    Tcl_Obj* pathObjPtr;
{
    /* All native paths are of the same type */
    return NULL;
}

/*
 *---------------------------------------------------------------------------
 *
 * TclpUtime --
 *
 *	Set the modification date for a file.
 *
 * Results:
 *	0 on success, -1 on error.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */
int 
TclpUtime(pathPtr, tval)
    Tcl_Obj *pathPtr;      /* File to modify */
    struct utimbuf *tval;  /* New modification date structure */
{
    return utime(Tcl_FSGetNativePath(pathPtr),tval);
}