summaryrefslogtreecommitdiff
path: root/dir.c
blob: c77294cd3b561859445c6f7f3ca46a2f248f2263 (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
/************************************************

  dir.c -

  $Author$
  $Date$
  created at: Wed Jan  5 09:51:01 JST 1994

  Copyright (C) 1993-1999 Yukihiro Matsumoto

************************************************/

#include "ruby.h"

#include <sys/types.h>
#include <sys/stat.h>

#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#else
# define MAXPATHLEN 1024
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#if HAVE_DIRENT_H
# include <dirent.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
#elif HAVE_DIRECT_H
# include <direct.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
#else
# define dirent direct
# define NAMLEN(dirent) (dirent)->d_namlen
# if HAVE_SYS_NDIR_H
#  include <sys/ndir.h>
# endif
# if HAVE_SYS_DIR_H
#  include <sys/dir.h>
# endif
# if HAVE_NDIR_H
#  include <ndir.h>
# endif
# if defined(NT) && defined(_MSC_VER)
#  include "missing/dir.h"
# endif
#endif

#include <errno.h>

#ifndef NT
char *getenv();
#endif

#ifdef USE_CWGUSI
# include <sys/errno.h>
#endif

VALUE rb_cDir;

static void
free_dir(dir)
    DIR *dir;
{
    if (dir) closedir(dir);
}

static VALUE dir_close _((VALUE));

static VALUE
dir_s_open(dir_class, dirname)
    VALUE dir_class, dirname;
{
    VALUE obj;
    DIR *dirp;

    Check_SafeStr(dirname);

    dirp = opendir(RSTRING(dirname)->ptr);
    if (dirp == NULL) {
	if (errno == EMFILE || errno == ENFILE) {
	    rb_gc();
	    dirp = opendir(RSTRING(dirname)->ptr);
	}
	if (dirp == NULL) {
	    rb_sys_fail(RSTRING(dirname)->ptr);
	}
    }

    obj = Data_Wrap_Struct(dir_class, 0, free_dir, dirp);

    if (rb_iterator_p()) {
	return rb_ensure(rb_yield, obj, dir_close, obj);
    }

    return obj;
}

static void
dir_closed()
{
    rb_raise(rb_eIOError, "closed directory");
}

#define GetDIR(obj, dirp) {\
    Data_Get_Struct(obj, DIR, dirp);\
    if (dirp == NULL) dir_closed();\
}

static VALUE
dir_read(dir)
    VALUE dir;
{
    DIR *dirp;
    struct dirent *dp;

    GetDIR(dir, dirp);
    errno = 0;
    dp = readdir(dirp);
    if (dp)
	return rb_tainted_str_new(dp->d_name, NAMLEN(dp));
    else if (errno == 0) {	/* end of stream */
	return Qnil;
    }
    else {
	rb_sys_fail(0);
    }
    return Qnil;		/* not reached */
}

static VALUE
dir_each(dir)
    VALUE dir;
{
    DIR *dirp;
    struct dirent *dp;
    VALUE file;

    GetDIR(dir, dirp);
    for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
	file = rb_tainted_str_new(dp->d_name, NAMLEN(dp));
	rb_yield(file);
    }
    return dir;
}

static VALUE
dir_tell(dir)
    VALUE dir;
{
    DIR *dirp;
    int pos;

#if !defined(__CYGWIN32__) && !defined(__BEOS__)
    GetDIR(dir, dirp);
    pos = telldir(dirp);
    return rb_int2inum(pos);
#else
    rb_notimplement();
#endif
}

static VALUE
dir_seek(dir, pos)
    VALUE dir, pos;
{
    DIR *dirp;

#if !defined(__CYGWIN32__) && !defined(__BEOS__)
    GetDIR(dir, dirp);
    seekdir(dirp, NUM2INT(pos));
    return dir;
#else
    rb_notimplement();
#endif
}

static VALUE
dir_rewind(dir)
    VALUE dir;
{
    DIR *dirp;

    GetDIR(dir, dirp);
    rewinddir(dirp);
    return dir;
}

static VALUE
dir_close(dir)
    VALUE dir;
{
    DIR *dirp;

    Data_Get_Struct(dir, DIR, dirp);
    if (dirp == NULL) dir_closed();
    closedir(dirp);
    DATA_PTR(dir) = NULL;

    return Qnil;
}

static VALUE
dir_s_chdir(argc, argv, obj)
    int argc;
    VALUE *argv;
    VALUE obj;
{
    VALUE path;
    char *dist = "";

    rb_secure(2);
    if (rb_scan_args(argc, argv, "01", &path) == 1) {
	Check_SafeStr(path);
	dist = RSTRING(path)->ptr;
    }
    else {
	dist = getenv("HOME");
	if (!dist) {
	    dist = getenv("LOGDIR");
	}
    }

    if (chdir(dist) < 0)
	rb_sys_fail(dist);

    return INT2FIX(0);
}

static VALUE
dir_s_getwd(dir)
    VALUE dir;
{
    char path[MAXPATHLEN];

#ifdef HAVE_GETCWD
    if (getcwd(path, sizeof(path)) == 0) rb_sys_fail(path);
#else
    extern char *getwd();
    if (getwd(path) == 0) rb_sys_fail(path);
#endif

    return rb_tainted_str_new2(path);
}

static VALUE
dir_s_chroot(dir, path)
    VALUE dir, path;
{
#if !defined(DJGPP) && !defined(NT) && !defined(__human68k__) && !defined(USE_CWGUSI) && !defined(__BEOS__)
    rb_secure(2);
    Check_SafeStr(path);

    if (chroot(RSTRING(path)->ptr) == -1)
	rb_sys_fail(RSTRING(path)->ptr);

    return INT2FIX(0);
#else
    rb_notimplement();
    return Qnil;		/* not reached */
#endif
}

static VALUE
dir_s_mkdir(argc, argv, obj)
    int argc;
    VALUE *argv;
    VALUE obj;
{
    VALUE path, vmode;
    int mode;

    rb_secure(2);
    if (rb_scan_args(argc, argv, "11", &path, &vmode) == 2) {
	mode = NUM2INT(vmode);
    }
    else {
	mode = 0777;
    }

    Check_SafeStr(path);
#if !defined(NT) && !defined(USE_CWGUSI)
    if (mkdir(RSTRING(path)->ptr, mode) == -1)
	rb_sys_fail(RSTRING(path)->ptr);
#else
    if (mkdir(RSTRING(path)->ptr) == -1)
	rb_sys_fail(RSTRING(path)->ptr);
#endif

    return INT2FIX(0);
}

static VALUE
dir_s_rmdir(obj, dir)
    VALUE obj, dir;
{
    rb_secure(2);
    Check_SafeStr(dir);
    if (rmdir(RSTRING(dir)->ptr) < 0)
	rb_sys_fail(RSTRING(dir)->ptr);

    return Qtrue;
}

#define isdelim(c) ((c)==' '||(c)=='\t'||(c)=='\n'||(c)=='\0')

char **glob_filename();
extern char *glob_error_return;

static void
push_globs(ary, s)
    VALUE ary;
    char *s;
{
    char **fnames, **ff;

    fnames = glob_filename(s);
    if (fnames == (char**)-1) rb_sys_fail(s);
    ff = fnames;
    while (*ff) {
	rb_ary_push(ary, rb_tainted_str_new2(*ff));
	free(*ff);
	ff++;
    }
    if (fnames != &glob_error_return) {
        free(fnames);
    }
}

static void
push_braces(ary, s)
    VALUE ary;
    char *s;
{
    char buf[MAXPATHLEN];
    char *p, *t, *b;
    char *lbrace, *rbrace;

    p = s;
    lbrace = rbrace = 0;
    while (*p) {
	if (*p == '{') {
	    lbrace = p;
	    break;
	}
	p++;
    }
    while (*p) {
	if (*p == '}' && lbrace) {
	    rbrace = p;
	    break;
	}
	p++;
    }

    if (lbrace) {
	memcpy(buf, s, lbrace-s);
	b = buf + (lbrace-s);
	p = lbrace;
	while (*p != '}') {
	    t = p + 1;
	    for (p = t; *p!='}' && *p!=','; p++) {
		/* skip inner braces */
		if (*p == '{') while (*p!='}') p++;
	    }
	    memcpy(b, t, p-t);
	    strcpy(b+(p-t), rbrace+1);
	    push_braces(ary, buf);
	}
    }
    else {
	push_globs(ary, s);
    }
}

static VALUE
dir_s_glob(dir, str)
    VALUE dir, str;
{
    char *p, *pend;
    char buf[MAXPATHLEN];
    char *t, *t0;
    int nest;
    VALUE ary;

    Check_SafeStr(str);
    if (RSTRING(str)->len > MAXPATHLEN) {
	rb_raise(rb_eArgError, "pathname too long (%d bytes)",
		 RSTRING(str)->len);
    }
    ary = rb_ary_new();

    p = RSTRING(str)->ptr;
    pend = p + RSTRING(str)->len;

    while (p < pend) {
	t = buf;
	while (p < pend && isdelim(*p)) p++;
	while (p < pend && !isdelim(*p)) {
	    *t++ = *p++;
	}
	*t = '\0';
	t0 = buf;
	nest = 0;
	while (t0 < t) {
	    if (*t0 == '{') nest+=2;
	    if (*t0 == '}') nest+=3;
	    t0++;
	}
	if (nest == 0) {
	    push_globs(ary, buf);
	}
	else if (nest % 5 == 0) {
	    push_braces(ary, buf);
	}
	/* else unmatched braces */
    }
    return ary;
}

static VALUE
dir_foreach(io, dirname)
    VALUE io, dirname;
{
    VALUE dir;

    dir = rb_funcall(rb_cDir, rb_intern("open"), 1, dirname);
    return rb_ensure(dir_each, dir, dir_close, dir);
}

static VALUE
dir_entries(io, dirname)
    VALUE io, dirname;
{
    VALUE dir;

    dir = rb_funcall(rb_cDir, rb_intern("open"), 1, dirname);
    return rb_ensure(rb_Array, dir, dir_close, dir);
}

void
Init_Dir()
{
    rb_cDir = rb_define_class("Dir", rb_cObject);

    rb_include_module(rb_cDir, rb_mEnumerable);

    rb_define_singleton_method(rb_cDir, "new", dir_s_open, 1);
    rb_define_singleton_method(rb_cDir, "open", dir_s_open, 1);
    rb_define_singleton_method(rb_cDir, "foreach", dir_foreach, 1);
    rb_define_singleton_method(rb_cDir, "entries", dir_entries, 1);

    rb_define_method(rb_cDir,"read", dir_read, 0);
    rb_define_method(rb_cDir,"each", dir_each, 0);
    rb_define_method(rb_cDir,"rewind", dir_rewind, 0);
    rb_define_method(rb_cDir,"tell", dir_tell, 0);
    rb_define_method(rb_cDir,"seek", dir_seek, 1);
    rb_define_method(rb_cDir,"close", dir_close, 0);

    rb_define_singleton_method(rb_cDir,"chdir", dir_s_chdir, -1);
    rb_define_singleton_method(rb_cDir,"getwd", dir_s_getwd, 0);
    rb_define_singleton_method(rb_cDir,"pwd", dir_s_getwd, 0);
    rb_define_singleton_method(rb_cDir,"chroot", dir_s_chroot, 1);
    rb_define_singleton_method(rb_cDir,"mkdir", dir_s_mkdir, -1);
    rb_define_singleton_method(rb_cDir,"rmdir", dir_s_rmdir, 1);
    rb_define_singleton_method(rb_cDir,"delete", dir_s_rmdir, 1);
    rb_define_singleton_method(rb_cDir,"unlink", dir_s_rmdir, 1);

    rb_define_singleton_method(rb_cDir,"glob", dir_s_glob, 1);
    rb_define_singleton_method(rb_cDir,"[]", dir_s_glob, 1);
}