source: branches/samba-3.3.x/source/utils/net_usershare.c

Last change on this file was 206, checked in by Herwig Bauernfeind, 16 years ago

Import Samba 3.3 branch at 3.0.0 level (psmedley's port)
File size: 27.9 KB
Line 
1/*
2 Samba Unix/Linux SMB client library
3 Distributed SMB/CIFS Server Management Utility
4
5 Copyright (C) Jeremy Allison (jra@samba.org) 2005
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19*/
20
21#include "includes.h"
22#include "utils/net.h"
23
24struct {
25 const char *us_errstr;
26 enum usershare_err us_err;
27} us_errs [] = {
28 {"",USERSHARE_OK},
29 {"Malformed usershare file", USERSHARE_MALFORMED_FILE},
30 {"Bad version number", USERSHARE_BAD_VERSION},
31 {"Malformed path entry", USERSHARE_MALFORMED_PATH},
32 {"Malformed comment entryfile", USERSHARE_MALFORMED_COMMENT_DEF},
33 {"Malformed acl definition", USERSHARE_MALFORMED_ACL_DEF},
34 {"Acl parse error", USERSHARE_ACL_ERR},
35 {"Path not absolute", USERSHARE_PATH_NOT_ABSOLUTE},
36 {"Path is denied", USERSHARE_PATH_IS_DENIED},
37 {"Path not allowed", USERSHARE_PATH_NOT_ALLOWED},
38 {"Path is not a directory", USERSHARE_PATH_NOT_DIRECTORY},
39 {"System error", USERSHARE_POSIX_ERR},
40 {NULL,(enum usershare_err)-1}
41};
42
43static const char *get_us_error_code(enum usershare_err us_err)
44{
45 char *result;
46 int idx = 0;
47
48 while (us_errs[idx].us_errstr != NULL) {
49 if (us_errs[idx].us_err == us_err) {
50 return us_errs[idx].us_errstr;
51 }
52 idx++;
53 }
54
55 result = talloc_asprintf(talloc_tos(), "Usershare error code (0x%x)",
56 (unsigned int)us_err);
57 SMB_ASSERT(result != NULL);
58 return result;
59}
60
61/* The help subsystem for the USERSHARE subcommand */
62
63static int net_usershare_add_usage(struct net_context *c, int argc, const char **argv)
64{
65 char chr = *lp_winbind_separator();
66 d_printf(
67 "net usershare add [-l|--long] <sharename> <path> [<comment>] [<acl>] [<guest_ok=[y|n]>]\n"
68 "\tAdds the specified share name for this user.\n"
69 "\t<sharename> is the new share name.\n"
70 "\t<path> is the path on the filesystem to export.\n"
71 "\t<comment> is the optional comment for the new share.\n"
72 "\t<acl> is an optional share acl in the format \"DOMAIN%cname:X,DOMAIN%cname:X,....\"\n"
73 "\t<guest_ok=y> if present sets \"guest ok = yes\" on this usershare.\n"
74 "\t\t\"X\" represents a permission and can be any one of the characters f, r or d\n"
75 "\t\twhere \"f\" means full control, \"r\" means read-only, \"d\" means deny access.\n"
76 "\t\tname may be a domain user or group. For local users use the local server name "
77 "instead of \"DOMAIN\"\n"
78 "\t\tThe default acl is \"Everyone:r\" which allows everyone read-only access.\n"
79 "\tAdd -l or --long to print the info on the newly added share.\n",
80 chr, chr );
81 return -1;
82}
83
84static int net_usershare_delete_usage(struct net_context *c, int argc, const char **argv)
85{
86 d_printf(
87 "net usershare delete <sharename>\n"
88 "\tdeletes the specified share name for this user.\n");
89 return -1;
90}
91
92static int net_usershare_info_usage(struct net_context *c, int argc, const char **argv)
93{
94 d_printf(
95 "net usershare info [-l|--long] [wildcard sharename]\n"
96 "\tPrints out the path, comment and acl elements of shares that match the wildcard.\n"
97 "\tBy default only gives info on shares owned by the current user\n"
98 "\tAdd -l or --long to apply this to all shares\n"
99 "\tOmit the sharename or use a wildcard of '*' to see all shares\n");
100 return -1;
101}
102
103static int net_usershare_list_usage(struct net_context *c, int argc, const char **argv)
104{
105 d_printf(
106 "net usershare list [-l|--long] [wildcard sharename]\n"
107 "\tLists the names of all shares that match the wildcard.\n"
108 "\tBy default only lists shares owned by the current user\n"
109 "\tAdd -l or --long to apply this to all shares\n"
110 "\tOmit the sharename or use a wildcard of '*' to see all shares\n");
111 return -1;
112}
113
114int net_usershare_usage(struct net_context *c, int argc, const char **argv)
115{
116 d_printf("net usershare add <sharename> <path> [<comment>] [<acl>] [<guest_ok=[y|n]>] to "
117 "add or change a user defined share.\n"
118 "net usershare delete <sharename> to delete a user defined share.\n"
119 "net usershare info [-l|--long] [wildcard sharename] to print info about a user defined share.\n"
120 "net usershare list [-l|--long] [wildcard sharename] to list user defined shares.\n"
121 "net usershare help\n"
122 "\nType \"net usershare help <option>\" to get more information on that option\n\n");
123
124 net_common_flags_usage(c, argc, argv);
125 return -1;
126}
127
128/***************************************************************************
129***************************************************************************/
130
131static char *get_basepath(TALLOC_CTX *ctx)
132{
133 char *basepath = talloc_strdup(ctx, lp_usershare_path());
134
135 if (!basepath) {
136 return NULL;
137 }
138 if ((basepath[0] != '\0') && (basepath[strlen(basepath)-1] == '/')) {
139 basepath[strlen(basepath)-1] = '\0';
140 }
141 return basepath;
142}
143
144/***************************************************************************
145 Delete a single userlevel share.
146***************************************************************************/
147
148static int net_usershare_delete(struct net_context *c, int argc, const char **argv)
149{
150 char *us_path;
151 char *sharename;
152
153 if (argc != 1 || c->display_usage) {
154 return net_usershare_delete_usage(c, argc, argv);
155 }
156
157 if ((sharename = strdup_lower(argv[0])) == NULL) {
158 d_fprintf(stderr, "strdup failed\n");
159 return -1;
160 }
161
162 if (!validate_net_name(sharename, INVALID_SHARENAME_CHARS, strlen(sharename))) {
163 d_fprintf(stderr, "net usershare delete: share name %s contains "
164 "invalid characters (any of %s)\n",
165 sharename, INVALID_SHARENAME_CHARS);
166 SAFE_FREE(sharename);
167 return -1;
168 }
169
170 us_path = talloc_asprintf(talloc_tos(),
171 "%s/%s",
172 lp_usershare_path(),
173 sharename);
174 if (!us_path) {
175 SAFE_FREE(sharename);
176 return -1;
177 }
178
179 if (unlink(us_path) != 0) {
180 d_fprintf(stderr, "net usershare delete: unable to remove usershare %s. "
181 "Error was %s\n",
182 us_path, strerror(errno));
183 SAFE_FREE(sharename);
184 return -1;
185 }
186 SAFE_FREE(sharename);
187 return 0;
188}
189
190/***************************************************************************
191 Data structures to handle a list of usershare files.
192***************************************************************************/
193
194struct file_list {
195 struct file_list *next, *prev;
196 const char *pathname;
197};
198
199static struct file_list *flist;
200
201/***************************************************************************
202***************************************************************************/
203
204static int get_share_list(TALLOC_CTX *ctx, const char *wcard, bool only_ours)
205{
206 SMB_STRUCT_DIR *dp;
207 SMB_STRUCT_DIRENT *de;
208 uid_t myuid = geteuid();
209 struct file_list *fl = NULL;
210 char *basepath = get_basepath(ctx);
211
212 if (!basepath) {
213 return -1;
214 }
215 dp = sys_opendir(basepath);
216 if (!dp) {
217 d_fprintf(stderr, "get_share_list: cannot open usershare directory %s. Error %s\n",
218 basepath, strerror(errno) );
219 return -1;
220 }
221
222 while((de = sys_readdir(dp)) != 0) {
223 SMB_STRUCT_STAT sbuf;
224 char *path;
225 const char *n = de->d_name;
226
227 /* Ignore . and .. */
228 if (*n == '.') {
229 if ((n[1] == '\0') || (n[1] == '.' && n[2] == '\0')) {
230 continue;
231 }
232 }
233
234 if (!validate_net_name(n, INVALID_SHARENAME_CHARS, strlen(n))) {
235 d_fprintf(stderr, "get_share_list: ignoring bad share name %s\n",n);
236 continue;
237 }
238 path = talloc_asprintf(ctx,
239 "%s/%s",
240 basepath,
241 n);
242 if (!path) {
243 sys_closedir(dp);
244 return -1;
245 }
246
247 if (sys_lstat(path, &sbuf) != 0) {
248 d_fprintf(stderr, "get_share_list: can't lstat file %s. Error was %s\n",
249 path, strerror(errno) );
250 continue;
251 }
252
253 if (!S_ISREG(sbuf.st_mode)) {
254 d_fprintf(stderr, "get_share_list: file %s is not a regular file. Ignoring.\n",
255 path );
256 continue;
257 }
258
259 if (only_ours && sbuf.st_uid != myuid) {
260 continue;
261 }
262
263 if (!unix_wild_match(wcard, n)) {
264 continue;
265 }
266
267 /* (Finally) - add to list. */
268 fl = TALLOC_P(ctx, struct file_list);
269 if (!fl) {
270 sys_closedir(dp);
271 return -1;
272 }
273 fl->pathname = talloc_strdup(ctx, n);
274 if (!fl->pathname) {
275 sys_closedir(dp);
276 return -1;
277 }
278
279 DLIST_ADD(flist, fl);
280 }
281
282 sys_closedir(dp);
283 return 0;
284}
285
286enum us_priv_op { US_LIST_OP, US_INFO_OP};
287
288struct us_priv_info {
289 TALLOC_CTX *ctx;
290 enum us_priv_op op;
291 struct net_context *c;
292};
293
294/***************************************************************************
295 Call a function for every share on the list.
296***************************************************************************/
297
298static int process_share_list(int (*fn)(struct file_list *, void *), void *priv)
299{
300 struct file_list *fl;
301 int ret = 0;
302
303 for (fl = flist; fl; fl = fl->next) {
304 ret = (*fn)(fl, priv);
305 }
306
307 return ret;
308}
309
310/***************************************************************************
311 Info function.
312***************************************************************************/
313
314static int info_fn(struct file_list *fl, void *priv)
315{
316 SMB_STRUCT_STAT sbuf;
317 char **lines = NULL;
318 struct us_priv_info *pi = (struct us_priv_info *)priv;
319 TALLOC_CTX *ctx = pi->ctx;
320 struct net_context *c = pi->c;
321 int fd = -1;
322 int numlines = 0;
323 SEC_DESC *psd = NULL;
324 char *basepath;
325 char *sharepath = NULL;
326 char *comment = NULL;
327 char *acl_str;
328 int num_aces;
329 char sep_str[2];
330 enum usershare_err us_err;
331 bool guest_ok = false;
332
333 sep_str[0] = *lp_winbind_separator();
334 sep_str[1] = '\0';
335
336 basepath = get_basepath(ctx);
337 if (!basepath) {
338 return -1;
339 }
340 basepath = talloc_asprintf_append(basepath,
341 "/%s",
342 fl->pathname);
343 if (!basepath) {
344 return -1;
345 }
346
347#ifdef O_NOFOLLOW
348 fd = sys_open(basepath, O_RDONLY|O_NOFOLLOW, 0);
349#else
350 fd = sys_open(basepath, O_RDONLY, 0);
351#endif
352
353 if (fd == -1) {
354 d_fprintf(stderr, "info_fn: unable to open %s. %s\n",
355 basepath, strerror(errno) );
356 return -1;
357 }
358
359 /* Paranoia... */
360 if (sys_fstat(fd, &sbuf) != 0) {
361 d_fprintf(stderr, "info_fn: can't fstat file %s. Error was %s\n",
362 basepath, strerror(errno) );
363 close(fd);
364 return -1;
365 }
366
367 if (!S_ISREG(sbuf.st_mode)) {
368 d_fprintf(stderr, "info_fn: file %s is not a regular file. Ignoring.\n",
369 basepath );
370 close(fd);
371 return -1;
372 }
373
374 lines = fd_lines_load(fd, &numlines, 10240);
375 close(fd);
376
377 if (lines == NULL) {
378 return -1;
379 }
380
381 /* Ensure it's well formed. */
382 us_err = parse_usershare_file(ctx, &sbuf, fl->pathname, -1, lines, numlines,
383 &sharepath,
384 &comment,
385 &psd,
386 &guest_ok);
387
388 file_lines_free(lines);
389
390 if (us_err != USERSHARE_OK) {
391 d_fprintf(stderr, "info_fn: file %s is not a well formed usershare file.\n",
392 basepath );
393 d_fprintf(stderr, "info_fn: Error was %s.\n",
394 get_us_error_code(us_err) );
395 return -1;
396 }
397
398 acl_str = talloc_strdup(ctx, "usershare_acl=");
399 if (!acl_str) {
400 return -1;
401 }
402
403 for (num_aces = 0; num_aces < psd->dacl->num_aces; num_aces++) {
404 const char *domain;
405 const char *name;
406 NTSTATUS ntstatus;
407
408 ntstatus = net_lookup_name_from_sid(c, ctx,
409 &psd->dacl->aces[num_aces].trustee,
410 &domain, &name);
411
412 if (NT_STATUS_IS_OK(ntstatus)) {
413 if (domain && *domain) {
414 acl_str = talloc_asprintf_append(acl_str,
415 "%s%s",
416 domain,
417 sep_str);
418 if (!acl_str) {
419 return -1;
420 }
421 }
422 acl_str = talloc_asprintf_append(acl_str,
423 "%s",
424 name);
425 if (!acl_str) {
426 return -1;
427 }
428
429 } else {
430 fstring sidstr;
431 sid_to_fstring(sidstr,
432 &psd->dacl->aces[num_aces].trustee);
433 acl_str = talloc_asprintf_append(acl_str,
434 "%s",
435 sidstr);
436 if (!acl_str) {
437 return -1;
438 }
439 }
440 acl_str = talloc_asprintf_append(acl_str, ":");
441 if (!acl_str) {
442 return -1;
443 }
444
445 if (psd->dacl->aces[num_aces].type == SEC_ACE_TYPE_ACCESS_DENIED) {
446 acl_str = talloc_asprintf_append(acl_str, "D,");
447 if (!acl_str) {
448 return -1;
449 }
450 } else {
451 if (psd->dacl->aces[num_aces].access_mask & GENERIC_ALL_ACCESS) {
452 acl_str = talloc_asprintf_append(acl_str, "F,");
453 } else {
454 acl_str = talloc_asprintf_append(acl_str, "R,");
455 }
456 if (!acl_str) {
457 return -1;
458 }
459 }
460 }
461
462 if (pi->op == US_INFO_OP) {
463 d_printf("[%s]\n", fl->pathname );
464 d_printf("path=%s\n", sharepath );
465 d_printf("comment=%s\n", comment);
466 d_printf("%s\n", acl_str);
467 d_printf("guest_ok=%c\n\n", guest_ok ? 'y' : 'n');
468 } else if (pi->op == US_LIST_OP) {
469 d_printf("%s\n", fl->pathname);
470 }
471
472 return 0;
473}
474
475/***************************************************************************
476 Print out info (internal detail) on userlevel shares.
477***************************************************************************/
478
479static int net_usershare_info(struct net_context *c, int argc, const char **argv)
480{
481 fstring wcard;
482 bool only_ours = true;
483 int ret = -1;
484 struct us_priv_info pi;
485 TALLOC_CTX *ctx;
486
487 fstrcpy(wcard, "*");
488
489 if (c->display_usage)
490 return net_usershare_info_usage(c, argc, argv);
491
492 if (c->opt_long_list_entries) {
493 only_ours = false;
494 }
495
496 switch (argc) {
497 case 0:
498 break;
499 case 1:
500 fstrcpy(wcard, argv[0]);
501 break;
502 default:
503 return net_usershare_info_usage(c, argc, argv);
504 }
505
506 strlower_m(wcard);
507
508 ctx = talloc_init("share_info");
509 ret = get_share_list(ctx, wcard, only_ours);
510 if (ret) {
511 return ret;
512 }
513
514 pi.ctx = ctx;
515 pi.op = US_INFO_OP;
516 pi.c = c;
517
518 ret = process_share_list(info_fn, &pi);
519 talloc_destroy(ctx);
520 return ret;
521}
522
523/***************************************************************************
524 Count the current total number of usershares.
525***************************************************************************/
526
527static int count_num_usershares(void)
528{
529 SMB_STRUCT_DIR *dp;
530 SMB_STRUCT_DIRENT *de;
531 int num_usershares = 0;
532 TALLOC_CTX *ctx = talloc_tos();
533 char *basepath = get_basepath(ctx);
534
535 if (!basepath) {
536 return -1;
537 }
538
539 dp = sys_opendir(basepath);
540 if (!dp) {
541 d_fprintf(stderr, "count_num_usershares: cannot open usershare directory %s. Error %s\n",
542 basepath, strerror(errno) );
543 return -1;
544 }
545
546 while((de = sys_readdir(dp)) != 0) {
547 SMB_STRUCT_STAT sbuf;
548 char *path;
549 const char *n = de->d_name;
550
551 /* Ignore . and .. */
552 if (*n == '.') {
553 if ((n[1] == '\0') || (n[1] == '.' && n[2] == '\0')) {
554 continue;
555 }
556 }
557
558 if (!validate_net_name(n, INVALID_SHARENAME_CHARS, strlen(n))) {
559 d_fprintf(stderr, "count_num_usershares: ignoring bad share name %s\n",n);
560 continue;
561 }
562 path = talloc_asprintf(ctx,
563 "%s/%s",
564 basepath,
565 n);
566 if (!path) {
567 sys_closedir(dp);
568 return -1;
569 }
570
571 if (sys_lstat(path, &sbuf) != 0) {
572 d_fprintf(stderr, "count_num_usershares: can't lstat file %s. Error was %s\n",
573 path, strerror(errno) );
574 continue;
575 }
576
577 if (!S_ISREG(sbuf.st_mode)) {
578 d_fprintf(stderr, "count_num_usershares: file %s is not a regular file. Ignoring.\n",
579 path );
580 continue;
581 }
582 num_usershares++;
583 }
584
585 sys_closedir(dp);
586 return num_usershares;
587}
588
589/***************************************************************************
590 Add a single userlevel share.
591***************************************************************************/
592
593static int net_usershare_add(struct net_context *c, int argc, const char **argv)
594{
595 TALLOC_CTX *ctx = talloc_stackframe();
596 SMB_STRUCT_STAT sbuf;
597 SMB_STRUCT_STAT lsbuf;
598 char *sharename;
599 char *full_path;
600 char *full_path_tmp;
601 const char *us_path;
602 const char *us_comment;
603 const char *arg_acl;
604 char *us_acl;
605 char *file_img;
606 int num_aces = 0;
607 int i;
608 int tmpfd;
609 const char *pacl;
610 size_t to_write;
611 uid_t myeuid = geteuid();
612 bool guest_ok = false;
613 int num_usershares;
614
615 us_comment = "";
616 arg_acl = "S-1-1-0:R";
617
618 if (c->display_usage)
619 return net_usershare_add_usage(c, argc, argv);
620
621 switch (argc) {
622 case 0:
623 case 1:
624 default:
625 return net_usershare_add_usage(c, argc, argv);
626 case 2:
627 sharename = strdup_lower(argv[0]);
628 us_path = argv[1];
629 break;
630 case 3:
631 sharename = strdup_lower(argv[0]);
632 us_path = argv[1];
633 us_comment = argv[2];
634 break;
635 case 4:
636 sharename = strdup_lower(argv[0]);
637 us_path = argv[1];
638 us_comment = argv[2];
639 arg_acl = argv[3];
640 break;
641 case 5:
642 sharename = strdup_lower(argv[0]);
643 us_path = argv[1];
644 us_comment = argv[2];
645 arg_acl = argv[3];
646 if (strlen(arg_acl) == 0) {
647 arg_acl = "S-1-1-0:R";
648 }
649 if (!strnequal(argv[4], "guest_ok=", 9)) {
650 TALLOC_FREE(ctx);
651 return net_usershare_add_usage(c, argc, argv);
652 }
653 switch (argv[4][9]) {
654 case 'y':
655 case 'Y':
656 guest_ok = true;
657 break;
658 case 'n':
659 case 'N':
660 guest_ok = false;
661 break;
662 default:
663 TALLOC_FREE(ctx);
664 return net_usershare_add_usage(c, argc, argv);
665 }
666 break;
667 }
668
669 /* Ensure we're under the "usershare max shares" number. Advisory only. */
670 num_usershares = count_num_usershares();
671 if (num_usershares >= lp_usershare_max_shares()) {
672 d_fprintf(stderr, "net usershare add: maximum number of allowed usershares (%d) reached\n",
673 lp_usershare_max_shares() );
674 TALLOC_FREE(ctx);
675 SAFE_FREE(sharename);
676 return -1;
677 }
678
679 if (!validate_net_name(sharename, INVALID_SHARENAME_CHARS, strlen(sharename))) {
680 d_fprintf(stderr, "net usershare add: share name %s contains "
681 "invalid characters (any of %s)\n",
682 sharename, INVALID_SHARENAME_CHARS);
683 TALLOC_FREE(ctx);
684 SAFE_FREE(sharename);
685 return -1;
686 }
687
688 /* Disallow shares the same as users. */
689 if (getpwnam(sharename)) {
690 d_fprintf(stderr, "net usershare add: share name %s is already a valid system user name\n",
691 sharename );
692 TALLOC_FREE(ctx);
693 SAFE_FREE(sharename);
694 return -1;
695 }
696
697 /* Construct the full path for the usershare file. */
698 full_path = get_basepath(ctx);
699 if (!full_path) {
700 TALLOC_FREE(ctx);
701 SAFE_FREE(sharename);
702 return -1;
703 }
704 full_path_tmp = talloc_asprintf(ctx,
705 "%s/:tmpXXXXXX",
706 full_path);
707 if (!full_path_tmp) {
708 TALLOC_FREE(ctx);
709 SAFE_FREE(sharename);
710 return -1;
711 }
712
713 full_path = talloc_asprintf_append(full_path,
714 "/%s",
715 sharename);
716 if (!full_path) {
717 TALLOC_FREE(ctx);
718 SAFE_FREE(sharename);
719 return -1;
720 }
721
722 /* The path *must* be absolute. */
723 if (us_path[0] != '/') {
724 d_fprintf(stderr,"net usershare add: path %s is not an absolute path.\n",
725 us_path);
726 TALLOC_FREE(ctx);
727 SAFE_FREE(sharename);
728 return -1;
729 }
730
731 /* Check the directory to be shared exists. */
732 if (sys_stat(us_path, &sbuf) != 0) {
733 d_fprintf(stderr, "net usershare add: cannot stat path %s to ensure "
734 "this is a directory. Error was %s\n",
735 us_path, strerror(errno) );
736 TALLOC_FREE(ctx);
737 SAFE_FREE(sharename);
738 return -1;
739 }
740
741 if (!S_ISDIR(sbuf.st_mode)) {
742 d_fprintf(stderr, "net usershare add: path %s is not a directory.\n",
743 us_path );
744 TALLOC_FREE(ctx);
745 SAFE_FREE(sharename);
746 return -1;
747 }
748
749 /* If we're not root, check if we're restricted to sharing out directories
750 that we own only. */
751
752 if ((myeuid != 0) && lp_usershare_owner_only() && (myeuid != sbuf.st_uid)) {
753 d_fprintf(stderr, "net usershare add: cannot share path %s as "
754 "we are restricted to only sharing directories we own.\n"
755 "\tAsk the administrator to add the line \"usershare owner only = false\" \n"
756 "\tto the [global] section of the smb.conf to allow this.\n",
757 us_path );
758 TALLOC_FREE(ctx);
759 SAFE_FREE(sharename);
760 return -1;
761 }
762
763 /* No validation needed on comment. Now go through and validate the
764 acl string. Convert names to SID's as needed. Then run it through
765 parse_usershare_acl to ensure it's valid. */
766
767 /* Start off the string we'll append to. */
768 us_acl = talloc_strdup(ctx, "");
769 if (!us_acl) {
770 TALLOC_FREE(ctx);
771 return -1;
772 }
773
774 pacl = arg_acl;
775 num_aces = 1;
776
777 /* Add the number of ',' characters to get the number of aces. */
778 num_aces += count_chars(pacl,',');
779
780 for (i = 0; i < num_aces; i++) {
781 DOM_SID sid;
782 const char *pcolon = strchr_m(pacl, ':');
783 const char *name;
784
785 if (pcolon == NULL) {
786 d_fprintf(stderr, "net usershare add: malformed acl %s (missing ':').\n",
787 pacl );
788 TALLOC_FREE(ctx);
789 SAFE_FREE(sharename);
790 return -1;
791 }
792
793 switch(pcolon[1]) {
794 case 'f':
795 case 'F':
796 case 'd':
797 case 'r':
798 case 'R':
799 break;
800 default:
801 d_fprintf(stderr, "net usershare add: malformed acl %s "
802 "(access control must be 'r', 'f', or 'd')\n",
803 pacl );
804 TALLOC_FREE(ctx);
805 SAFE_FREE(sharename);
806 return -1;
807 }
808
809 if (pcolon[2] != ',' && pcolon[2] != '\0') {
810 d_fprintf(stderr, "net usershare add: malformed terminating character for acl %s\n",
811 pacl );
812 TALLOC_FREE(ctx);
813 SAFE_FREE(sharename);
814 return -1;
815 }
816
817 /* Get the name */
818 if ((name = talloc_strndup(ctx, pacl, pcolon - pacl)) == NULL) {
819 d_fprintf(stderr, "talloc_strndup failed\n");
820 TALLOC_FREE(ctx);
821 SAFE_FREE(sharename);
822 return -1;
823 }
824 if (!string_to_sid(&sid, name)) {
825 /* Convert to a SID */
826 NTSTATUS ntstatus = net_lookup_sid_from_name(c, ctx, name, &sid);
827 if (!NT_STATUS_IS_OK(ntstatus)) {
828 d_fprintf(stderr, "net usershare add: cannot convert name \"%s\" to a SID. %s.",
829 name, get_friendly_nt_error_msg(ntstatus) );
830 if (NT_STATUS_EQUAL(ntstatus, NT_STATUS_CONNECTION_REFUSED)) {
831 d_fprintf(stderr, " Maybe smbd is not running.\n");
832 } else {
833 d_fprintf(stderr, "\n");
834 }
835 TALLOC_FREE(ctx);
836 SAFE_FREE(sharename);
837 return -1;
838 }
839 }
840 us_acl = talloc_asprintf_append(
841 us_acl, "%s:%c,", sid_string_tos(&sid), pcolon[1]);
842
843 /* Move to the next ACL entry. */
844 if (pcolon[2] == ',') {
845 pacl = &pcolon[3];
846 }
847 }
848
849 /* Remove the last ',' */
850 us_acl[strlen(us_acl)-1] = '\0';
851
852 if (guest_ok && !lp_usershare_allow_guests()) {
853 d_fprintf(stderr, "net usershare add: guest_ok=y requested "
854 "but the \"usershare allow guests\" parameter is not enabled "
855 "by this server.\n");
856 TALLOC_FREE(ctx);
857 SAFE_FREE(sharename);
858 return -1;
859 }
860
861 /* Create a temporary filename for this share. */
862 tmpfd = smb_mkstemp(full_path_tmp);
863
864 if (tmpfd == -1) {
865 d_fprintf(stderr, "net usershare add: cannot create tmp file %s\n",
866 full_path_tmp );
867 TALLOC_FREE(ctx);
868 SAFE_FREE(sharename);
869 return -1;
870 }
871
872 /* Ensure we opened the file we thought we did. */
873 if (sys_lstat(full_path_tmp, &lsbuf) != 0) {
874 d_fprintf(stderr, "net usershare add: cannot lstat tmp file %s\n",
875 full_path_tmp );
876 TALLOC_FREE(ctx);
877 SAFE_FREE(sharename);
878 return -1;
879 }
880
881 /* Check this is the same as the file we opened. */
882 if (sys_fstat(tmpfd, &sbuf) != 0) {
883 d_fprintf(stderr, "net usershare add: cannot fstat tmp file %s\n",
884 full_path_tmp );
885 TALLOC_FREE(ctx);
886 SAFE_FREE(sharename);
887 return -1;
888 }
889
890 if (!S_ISREG(sbuf.st_mode) || sbuf.st_dev != lsbuf.st_dev || sbuf.st_ino != lsbuf.st_ino) {
891 d_fprintf(stderr, "net usershare add: tmp file %s is not a regular file ?\n",
892 full_path_tmp );
893 TALLOC_FREE(ctx);
894 SAFE_FREE(sharename);
895 return -1;
896 }
897
898 if (fchmod(tmpfd, 0644) == -1) {
899 d_fprintf(stderr, "net usershare add: failed to fchmod tmp file %s to 0644n",
900 full_path_tmp );
901 TALLOC_FREE(ctx);
902 SAFE_FREE(sharename);
903 return -1;
904 }
905
906 /* Create the in-memory image of the file. */
907 file_img = talloc_strdup(ctx, "#VERSION 2\npath=");
908 file_img = talloc_asprintf_append(file_img, "%s\ncomment=%s\nusershare_acl=%s\nguest_ok=%c\n",
909 us_path, us_comment, us_acl, guest_ok ? 'y' : 'n');
910
911 to_write = strlen(file_img);
912
913 if (write(tmpfd, file_img, to_write) != to_write) {
914 d_fprintf(stderr, "net usershare add: failed to write %u bytes to file %s. Error was %s\n",
915 (unsigned int)to_write, full_path_tmp, strerror(errno));
916 unlink(full_path_tmp);
917 TALLOC_FREE(ctx);
918 SAFE_FREE(sharename);
919 return -1;
920 }
921
922 /* Attempt to replace any existing share by this name. */
923#ifdef __OS2__
924 close(tmpfd);
925#endif
926 if (rename(full_path_tmp, full_path) != 0) {
927 unlink(full_path_tmp);
928 d_fprintf(stderr, "net usershare add: failed to add share %s. Error was %s\n",
929 sharename, strerror(errno));
930 TALLOC_FREE(ctx);
931 close(tmpfd);
932 SAFE_FREE(sharename);
933 return -1;
934 }
935
936#ifndef __OS2__
937 close(tmpfd);
938#endif
939
940 if (c->opt_long_list_entries) {
941 const char *my_argv[2];
942 my_argv[0] = sharename;
943 my_argv[1] = NULL;
944 net_usershare_info(c, 1, my_argv);
945 }
946
947 SAFE_FREE(sharename);
948 TALLOC_FREE(ctx);
949 return 0;
950}
951
952#if 0
953/***************************************************************************
954 List function.
955***************************************************************************/
956
957static int list_fn(struct file_list *fl, void *priv)
958{
959 d_printf("%s\n", fl->pathname);
960 return 0;
961}
962#endif
963
964/***************************************************************************
965 List userlevel shares.
966***************************************************************************/
967
968static int net_usershare_list(struct net_context *c, int argc,
969 const char **argv)
970{
971 fstring wcard;
972 bool only_ours = true;
973 int ret = -1;
974 struct us_priv_info pi;
975 TALLOC_CTX *ctx;
976
977 fstrcpy(wcard, "*");
978
979 if (c->display_usage)
980 return net_usershare_list_usage(c, argc, argv);
981
982 if (c->opt_long_list_entries) {
983 only_ours = false;
984 }
985
986 switch (argc) {
987 case 0:
988 break;
989 case 1:
990 fstrcpy(wcard, argv[0]);
991 break;
992 default:
993 return net_usershare_list_usage(c, argc, argv);
994 }
995
996 strlower_m(wcard);
997
998 ctx = talloc_init("share_list");
999 ret = get_share_list(ctx, wcard, only_ours);
1000 if (ret) {
1001 return ret;
1002 }
1003
1004 pi.ctx = ctx;
1005 pi.op = US_LIST_OP;
1006
1007 ret = process_share_list(info_fn, &pi);
1008 talloc_destroy(ctx);
1009 return ret;
1010}
1011
1012/***************************************************************************
1013 Entry-point for all the USERSHARE functions.
1014***************************************************************************/
1015
1016int net_usershare(struct net_context *c, int argc, const char **argv)
1017{
1018 SMB_STRUCT_DIR *dp;
1019
1020 struct functable func[] = {
1021 {
1022 "add",
1023 net_usershare_add,
1024 NET_TRANSPORT_LOCAL,
1025 "Add/modify user defined share",
1026 "net usershare add\n"
1027 " Add/modify user defined share"
1028 },
1029 {
1030 "delete",
1031 net_usershare_delete,
1032 NET_TRANSPORT_LOCAL,
1033 "Delete user defined share",
1034 "net usershare delete\n"
1035 " Delete user defined share"
1036 },
1037 {
1038 "info",
1039 net_usershare_info,
1040 NET_TRANSPORT_LOCAL,
1041 "Display information about a user defined share",
1042 "net usershare info\n"
1043 " Display information about a user defined share"
1044 },
1045 {
1046 "list",
1047 net_usershare_list,
1048 NET_TRANSPORT_LOCAL,
1049 "List user defined shares",
1050 "net usershare list\n"
1051 " List user defined shares"
1052 },
1053 {NULL, NULL, 0, NULL, NULL}
1054 };
1055
1056 if (lp_usershare_max_shares() == 0) {
1057 d_fprintf(stderr, "net usershare: usershares are currently disabled\n");
1058 return -1;
1059 }
1060
1061 dp = sys_opendir(lp_usershare_path());
1062 if (!dp) {
1063 int err = errno;
1064 d_fprintf(stderr, "net usershare: cannot open usershare directory %s. Error %s\n",
1065 lp_usershare_path(), strerror(err) );
1066 if (err == EACCES) {
1067 d_fprintf(stderr, "You do not have permission to create a usershare. Ask your "
1068 "administrator to grant you permissions to create a share.\n");
1069 } else if (err == ENOENT) {
1070 d_fprintf(stderr, "Please ask your system administrator to "
1071 "enable user sharing.\n");
1072 }
1073 return -1;
1074 }
1075 sys_closedir(dp);
1076
1077 return net_run_function(c, argc, argv, "net usershare", func);
1078}
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