source: vendor/3.6.9/source3/utils/net_usershare.c

Last change on this file was 740, checked in by Silvan Scherrer, 13 years ago

Samba Server: update vendor to 3.6.0
File size: 28.7 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 "system/passwd.h"
23#include "system/filesys.h"
24#include "utils/net.h"
25#include "../libcli/security/security.h"
26
27struct {
28 const char *us_errstr;
29 enum usershare_err us_err;
30} us_errs [] = {
31 {"",USERSHARE_OK},
32 {N_("Malformed usershare file"), USERSHARE_MALFORMED_FILE},
33 {N_("Bad version number"), USERSHARE_BAD_VERSION},
34 {N_("Malformed path entry"), USERSHARE_MALFORMED_PATH},
35 {N_("Malformed comment entryfile"), USERSHARE_MALFORMED_COMMENT_DEF},
36 {N_("Malformed acl definition"), USERSHARE_MALFORMED_ACL_DEF},
37 {N_("Acl parse error"), USERSHARE_ACL_ERR},
38 {N_("Path not absolute"), USERSHARE_PATH_NOT_ABSOLUTE},
39 {N_("Path is denied"), USERSHARE_PATH_IS_DENIED},
40 {N_("Path not allowed"), USERSHARE_PATH_NOT_ALLOWED},
41 {N_("Path is not a directory"), USERSHARE_PATH_NOT_DIRECTORY},
42 {N_("System error"), USERSHARE_POSIX_ERR},
43 {N_("Malformed sharename definition"), USERSHARE_MALFORMED_SHARENAME_DEF},
44 {N_("Bad sharename (doesn't match filename)"), USERSHARE_BAD_SHARENAME},
45 {NULL,(enum usershare_err)-1}
46};
47
48static const char *get_us_error_code(enum usershare_err us_err)
49{
50 char *result;
51 int idx = 0;
52
53 while (us_errs[idx].us_errstr != NULL) {
54 if (us_errs[idx].us_err == us_err) {
55 return us_errs[idx].us_errstr;
56 }
57 idx++;
58 }
59
60 result = talloc_asprintf(talloc_tos(), _("Usershare error code (0x%x)"),
61 (unsigned int)us_err);
62 SMB_ASSERT(result != NULL);
63 return result;
64}
65
66/* The help subsystem for the USERSHARE subcommand */
67
68static int net_usershare_add_usage(struct net_context *c, int argc, const char **argv)
69{
70 char chr = *lp_winbind_separator();
71 d_printf(_(
72 "net usershare add [-l|--long] <sharename> <path> [<comment>] [<acl>] [<guest_ok=[y|n]>]\n"
73 "\tAdds the specified share name for this user.\n"
74 "\t<sharename> is the new share name.\n"
75 "\t<path> is the path on the filesystem to export.\n"
76 "\t<comment> is the optional comment for the new share.\n"
77 "\t<acl> is an optional share acl in the format \"DOMAIN%cname:X,DOMAIN%cname:X,....\"\n"
78 "\t<guest_ok=y> if present sets \"guest ok = yes\" on this usershare.\n"
79 "\t\t\"X\" represents a permission and can be any one of the characters f, r or d\n"
80 "\t\twhere \"f\" means full control, \"r\" means read-only, \"d\" means deny access.\n"
81 "\t\tname may be a domain user or group. For local users use the local server name "
82 "instead of \"DOMAIN\"\n"
83 "\t\tThe default acl is \"Everyone:r\" which allows everyone read-only access.\n"
84 "\tAdd -l or --long to print the info on the newly added share.\n"),
85 chr, chr );
86 return -1;
87}
88
89static int net_usershare_delete_usage(struct net_context *c, int argc, const char **argv)
90{
91 d_printf(_(
92 "net usershare delete <sharename>\n"
93 "\tdeletes the specified share name for this user.\n"));
94 return -1;
95}
96
97static int net_usershare_info_usage(struct net_context *c, int argc, const char **argv)
98{
99 d_printf(_(
100 "net usershare info [-l|--long] [wildcard sharename]\n"
101 "\tPrints out the path, comment and acl elements of shares that match the wildcard.\n"
102 "\tBy default only gives info on shares owned by the current user\n"
103 "\tAdd -l or --long to apply this to all shares\n"
104 "\tOmit the sharename or use a wildcard of '*' to see all shares\n"));
105 return -1;
106}
107
108static int net_usershare_list_usage(struct net_context *c, int argc, const char **argv)
109{
110 d_printf(_(
111 "net usershare list [-l|--long] [wildcard sharename]\n"
112 "\tLists the names of all shares that match the wildcard.\n"
113 "\tBy default only lists shares owned by the current user\n"
114 "\tAdd -l or --long to apply this to all shares\n"
115 "\tOmit the sharename or use a wildcard of '*' to see all shares\n"));
116 return -1;
117}
118
119int net_usershare_usage(struct net_context *c, int argc, const char **argv)
120{
121 d_printf(_("net usershare add <sharename> <path> [<comment>] [<acl>] [<guest_ok=[y|n]>] to "
122 "add or change a user defined share.\n"
123 "net usershare delete <sharename> to delete a user defined share.\n"
124 "net usershare info [-l|--long] [wildcard sharename] to print info about a user defined share.\n"
125 "net usershare list [-l|--long] [wildcard sharename] to list user defined shares.\n"
126 "net usershare help\n"
127 "\nType \"net usershare help <option>\" to get more information on that option\n\n"));
128
129 net_common_flags_usage(c, argc, argv);
130 return -1;
131}
132
133/***************************************************************************
134***************************************************************************/
135
136static char *get_basepath(TALLOC_CTX *ctx)
137{
138 char *basepath = talloc_strdup(ctx, lp_usershare_path());
139
140 if (!basepath) {
141 return NULL;
142 }
143 if ((basepath[0] != '\0') && (basepath[strlen(basepath)-1] == '/')) {
144 basepath[strlen(basepath)-1] = '\0';
145 }
146 return basepath;
147}
148
149/***************************************************************************
150 Delete a single userlevel share.
151***************************************************************************/
152
153static int net_usershare_delete(struct net_context *c, int argc, const char **argv)
154{
155 char *us_path;
156 char *sharename;
157
158 if (argc != 1 || c->display_usage) {
159 return net_usershare_delete_usage(c, argc, argv);
160 }
161
162 if ((sharename = strlower_talloc(talloc_tos(), argv[0])) == NULL) {
163 d_fprintf(stderr, _("strlower_talloc failed\n"));
164 return -1;
165 }
166
167 if (!validate_net_name(sharename, INVALID_SHARENAME_CHARS, strlen(sharename))) {
168 d_fprintf(stderr, _("net usershare delete: share name %s contains "
169 "invalid characters (any of %s)\n"),
170 sharename, INVALID_SHARENAME_CHARS);
171 TALLOC_FREE(sharename);
172 return -1;
173 }
174
175 us_path = talloc_asprintf(talloc_tos(),
176 "%s/%s",
177 lp_usershare_path(),
178 sharename);
179 if (!us_path) {
180 TALLOC_FREE(sharename);
181 return -1;
182 }
183
184 if (unlink(us_path) != 0) {
185 d_fprintf(stderr, _("net usershare delete: unable to remove usershare %s. "
186 "Error was %s\n"),
187 us_path, strerror(errno));
188 TALLOC_FREE(sharename);
189 return -1;
190 }
191 TALLOC_FREE(sharename);
192 return 0;
193}
194
195/***************************************************************************
196 Data structures to handle a list of usershare files.
197***************************************************************************/
198
199struct file_list {
200 struct file_list *next, *prev;
201 const char *pathname;
202};
203
204static struct file_list *flist;
205
206/***************************************************************************
207***************************************************************************/
208
209static int get_share_list(TALLOC_CTX *ctx, const char *wcard, bool only_ours)
210{
211 SMB_STRUCT_DIR *dp;
212 SMB_STRUCT_DIRENT *de;
213 uid_t myuid = geteuid();
214 struct file_list *fl = NULL;
215 char *basepath = get_basepath(ctx);
216
217 if (!basepath) {
218 return -1;
219 }
220 dp = sys_opendir(basepath);
221 if (!dp) {
222 d_fprintf(stderr,
223 _("get_share_list: cannot open usershare directory %s. "
224 "Error %s\n"),
225 basepath, strerror(errno) );
226 return -1;
227 }
228
229 while((de = sys_readdir(dp)) != 0) {
230 SMB_STRUCT_STAT sbuf;
231 char *path;
232 const char *n = de->d_name;
233
234 /* Ignore . and .. */
235 if (*n == '.') {
236 if ((n[1] == '\0') || (n[1] == '.' && n[2] == '\0')) {
237 continue;
238 }
239 }
240
241 if (!validate_net_name(n, INVALID_SHARENAME_CHARS, strlen(n))) {
242 d_fprintf(stderr,
243 _("get_share_list: ignoring bad share "
244 "name %s\n"), n);
245 continue;
246 }
247 path = talloc_asprintf(ctx,
248 "%s/%s",
249 basepath,
250 n);
251 if (!path) {
252 sys_closedir(dp);
253 return -1;
254 }
255
256 if (sys_lstat(path, &sbuf, false) != 0) {
257 d_fprintf(stderr,
258 _("get_share_list: can't lstat file %s. Error "
259 "was %s\n"),
260 path, strerror(errno) );
261 continue;
262 }
263
264 if (!S_ISREG(sbuf.st_ex_mode)) {
265 d_fprintf(stderr,
266 _("get_share_list: file %s is not a regular "
267 "file. Ignoring.\n"),
268 path );
269 continue;
270 }
271
272 if (only_ours && sbuf.st_ex_uid != myuid) {
273 continue;
274 }
275
276 if (!unix_wild_match(wcard, n)) {
277 continue;
278 }
279
280 /* (Finally) - add to list. */
281 fl = TALLOC_P(ctx, struct file_list);
282 if (!fl) {
283 sys_closedir(dp);
284 return -1;
285 }
286 fl->pathname = talloc_strdup(ctx, n);
287 if (!fl->pathname) {
288 sys_closedir(dp);
289 return -1;
290 }
291
292 DLIST_ADD(flist, fl);
293 }
294
295 sys_closedir(dp);
296 return 0;
297}
298
299enum us_priv_op { US_LIST_OP, US_INFO_OP};
300
301struct us_priv_info {
302 TALLOC_CTX *ctx;
303 enum us_priv_op op;
304 struct net_context *c;
305};
306
307/***************************************************************************
308 Call a function for every share on the list.
309***************************************************************************/
310
311static int process_share_list(int (*fn)(struct file_list *, void *), void *priv)
312{
313 struct file_list *fl;
314 int ret = 0;
315
316 for (fl = flist; fl; fl = fl->next) {
317 ret = (*fn)(fl, priv);
318 }
319
320 return ret;
321}
322
323/***************************************************************************
324 Info function.
325***************************************************************************/
326
327static int info_fn(struct file_list *fl, void *priv)
328{
329 SMB_STRUCT_STAT sbuf;
330 char **lines = NULL;
331 struct us_priv_info *pi = (struct us_priv_info *)priv;
332 TALLOC_CTX *ctx = pi->ctx;
333 struct net_context *c = pi->c;
334 int fd = -1;
335 int numlines = 0;
336 struct security_descriptor *psd = NULL;
337 char *basepath;
338 char *sharepath = NULL;
339 char *comment = NULL;
340 char *cp_sharename = NULL;
341 char *acl_str;
342 int num_aces;
343 char sep_str[2];
344 enum usershare_err us_err;
345 bool guest_ok = false;
346
347 sep_str[0] = *lp_winbind_separator();
348 sep_str[1] = '\0';
349
350 basepath = get_basepath(ctx);
351 if (!basepath) {
352 return -1;
353 }
354 basepath = talloc_asprintf_append(basepath,
355 "/%s",
356 fl->pathname);
357 if (!basepath) {
358 return -1;
359 }
360
361#ifdef O_NOFOLLOW
362 fd = sys_open(basepath, O_RDONLY|O_NOFOLLOW, 0);
363#else
364 fd = sys_open(basepath, O_RDONLY, 0);
365#endif
366
367 if (fd == -1) {
368 d_fprintf(stderr, _("info_fn: unable to open %s. %s\n"),
369 basepath, strerror(errno) );
370 return -1;
371 }
372
373 /* Paranoia... */
374 if (sys_fstat(fd, &sbuf, false) != 0) {
375 d_fprintf(stderr,
376 _("info_fn: can't fstat file %s. Error was %s\n"),
377 basepath, strerror(errno) );
378 close(fd);
379 return -1;
380 }
381
382 if (!S_ISREG(sbuf.st_ex_mode)) {
383 d_fprintf(stderr,
384 _("info_fn: file %s is not a regular file. Ignoring.\n"),
385 basepath );
386 close(fd);
387 return -1;
388 }
389
390 lines = fd_lines_load(fd, &numlines, 10240, NULL);
391 close(fd);
392
393 if (lines == NULL) {
394 return -1;
395 }
396
397 /* Ensure it's well formed. */
398 us_err = parse_usershare_file(ctx, &sbuf, fl->pathname, -1, lines, numlines,
399 &sharepath,
400 &comment,
401 &cp_sharename,
402 &psd,
403 &guest_ok);
404
405 TALLOC_FREE(lines);
406
407 if (us_err != USERSHARE_OK) {
408 d_fprintf(stderr,
409 _("info_fn: file %s is not a well formed usershare "
410 "file.\n"),
411 basepath );
412 d_fprintf(stderr, _("info_fn: Error was %s.\n"),
413 get_us_error_code(us_err) );
414 return -1;
415 }
416
417 acl_str = talloc_strdup(ctx, "usershare_acl=");
418 if (!acl_str) {
419 return -1;
420 }
421
422 for (num_aces = 0; num_aces < psd->dacl->num_aces; num_aces++) {
423 const char *domain;
424 const char *name;
425 NTSTATUS ntstatus;
426
427 ntstatus = net_lookup_name_from_sid(c, ctx,
428 &psd->dacl->aces[num_aces].trustee,
429 &domain, &name);
430
431 if (NT_STATUS_IS_OK(ntstatus)) {
432 if (domain && *domain) {
433 acl_str = talloc_asprintf_append(acl_str,
434 "%s%s",
435 domain,
436 sep_str);
437 if (!acl_str) {
438 return -1;
439 }
440 }
441 acl_str = talloc_asprintf_append(acl_str,
442 "%s",
443 name);
444 if (!acl_str) {
445 return -1;
446 }
447
448 } else {
449 fstring sidstr;
450 sid_to_fstring(sidstr,
451 &psd->dacl->aces[num_aces].trustee);
452 acl_str = talloc_asprintf_append(acl_str,
453 "%s",
454 sidstr);
455 if (!acl_str) {
456 return -1;
457 }
458 }
459 acl_str = talloc_asprintf_append(acl_str, ":");
460 if (!acl_str) {
461 return -1;
462 }
463
464 if (psd->dacl->aces[num_aces].type == SEC_ACE_TYPE_ACCESS_DENIED) {
465 acl_str = talloc_asprintf_append(acl_str, "D,");
466 if (!acl_str) {
467 return -1;
468 }
469 } else {
470 if (psd->dacl->aces[num_aces].access_mask & GENERIC_ALL_ACCESS) {
471 acl_str = talloc_asprintf_append(acl_str, "F,");
472 } else {
473 acl_str = talloc_asprintf_append(acl_str, "R,");
474 }
475 if (!acl_str) {
476 return -1;
477 }
478 }
479 }
480
481 /* NOTE: This is smb.conf-like output. Do not translate. */
482 if (pi->op == US_INFO_OP) {
483 d_printf("[%s]\n", cp_sharename );
484 d_printf("path=%s\n", sharepath );
485 d_printf("comment=%s\n", comment);
486 d_printf("%s\n", acl_str);
487 d_printf("guest_ok=%c\n\n", guest_ok ? 'y' : 'n');
488 } else if (pi->op == US_LIST_OP) {
489 d_printf("%s\n", cp_sharename);
490 }
491
492 return 0;
493}
494
495/***************************************************************************
496 Print out info (internal detail) on userlevel shares.
497***************************************************************************/
498
499static int net_usershare_info(struct net_context *c, int argc, const char **argv)
500{
501 fstring wcard;
502 bool only_ours = true;
503 int ret = -1;
504 struct us_priv_info pi;
505 TALLOC_CTX *ctx;
506
507 fstrcpy(wcard, "*");
508
509 if (c->display_usage)
510 return net_usershare_info_usage(c, argc, argv);
511
512 if (c->opt_long_list_entries) {
513 only_ours = false;
514 }
515
516 switch (argc) {
517 case 0:
518 break;
519 case 1:
520 fstrcpy(wcard, argv[0]);
521 break;
522 default:
523 return net_usershare_info_usage(c, argc, argv);
524 }
525
526 strlower_m(wcard);
527
528 ctx = talloc_init("share_info");
529 ret = get_share_list(ctx, wcard, only_ours);
530 if (ret) {
531 return ret;
532 }
533
534 pi.ctx = ctx;
535 pi.op = US_INFO_OP;
536 pi.c = c;
537
538 ret = process_share_list(info_fn, &pi);
539 talloc_destroy(ctx);
540 return ret;
541}
542
543/***************************************************************************
544 Count the current total number of usershares.
545***************************************************************************/
546
547static int count_num_usershares(void)
548{
549 SMB_STRUCT_DIR *dp;
550 SMB_STRUCT_DIRENT *de;
551 int num_usershares = 0;
552 TALLOC_CTX *ctx = talloc_tos();
553 char *basepath = get_basepath(ctx);
554
555 if (!basepath) {
556 return -1;
557 }
558
559 dp = sys_opendir(basepath);
560 if (!dp) {
561 d_fprintf(stderr,
562 _("count_num_usershares: cannot open usershare "
563 "directory %s. Error %s\n"),
564 basepath, strerror(errno) );
565 return -1;
566 }
567
568 while((de = sys_readdir(dp)) != 0) {
569 SMB_STRUCT_STAT sbuf;
570 char *path;
571 const char *n = de->d_name;
572
573 /* Ignore . and .. */
574 if (*n == '.') {
575 if ((n[1] == '\0') || (n[1] == '.' && n[2] == '\0')) {
576 continue;
577 }
578 }
579
580 if (!validate_net_name(n, INVALID_SHARENAME_CHARS, strlen(n))) {
581 d_fprintf(stderr,
582 _("count_num_usershares: ignoring bad share "
583 "name %s\n"), n);
584 continue;
585 }
586 path = talloc_asprintf(ctx,
587 "%s/%s",
588 basepath,
589 n);
590 if (!path) {
591 sys_closedir(dp);
592 return -1;
593 }
594
595 if (sys_lstat(path, &sbuf, false) != 0) {
596 d_fprintf(stderr,
597 _("count_num_usershares: can't lstat file %s. "
598 "Error was %s\n"),
599 path, strerror(errno) );
600 continue;
601 }
602
603 if (!S_ISREG(sbuf.st_ex_mode)) {
604 d_fprintf(stderr,
605 _("count_num_usershares: file %s is not a "
606 "regular file. Ignoring.\n"),
607 path );
608 continue;
609 }
610 num_usershares++;
611 }
612
613 sys_closedir(dp);
614 return num_usershares;
615}
616
617/***************************************************************************
618 Add a single userlevel share.
619***************************************************************************/
620
621static int net_usershare_add(struct net_context *c, int argc, const char **argv)
622{
623 TALLOC_CTX *ctx = talloc_stackframe();
624 SMB_STRUCT_STAT sbuf;
625 SMB_STRUCT_STAT lsbuf;
626 char *sharename;
627 const char *cp_sharename;
628 char *full_path;
629 char *full_path_tmp;
630 const char *us_path;
631 const char *us_comment;
632 const char *arg_acl;
633 char *us_acl;
634 char *file_img;
635 int num_aces = 0;
636 int i;
637 int tmpfd;
638 const char *pacl;
639 size_t to_write;
640 uid_t myeuid = geteuid();
641 bool guest_ok = false;
642 int num_usershares;
643
644 us_comment = "";
645 arg_acl = "S-1-1-0:R";
646
647 if (c->display_usage)
648 return net_usershare_add_usage(c, argc, argv);
649
650 switch (argc) {
651 case 0:
652 case 1:
653 default:
654 return net_usershare_add_usage(c, argc, argv);
655 case 2:
656 cp_sharename = argv[0];
657 sharename = strlower_talloc(ctx, argv[0]);
658 us_path = argv[1];
659 break;
660 case 3:
661 cp_sharename = argv[0];
662 sharename = strlower_talloc(ctx, argv[0]);
663 us_path = argv[1];
664 us_comment = argv[2];
665 break;
666 case 4:
667 cp_sharename = argv[0];
668 sharename = strlower_talloc(ctx, argv[0]);
669 us_path = argv[1];
670 us_comment = argv[2];
671 arg_acl = argv[3];
672 break;
673 case 5:
674 cp_sharename = argv[0];
675 sharename = strlower_talloc(ctx, argv[0]);
676 us_path = argv[1];
677 us_comment = argv[2];
678 arg_acl = argv[3];
679 if (strlen(arg_acl) == 0) {
680 arg_acl = "S-1-1-0:R";
681 }
682 if (!strnequal(argv[4], "guest_ok=", 9)) {
683 TALLOC_FREE(ctx);
684 return net_usershare_add_usage(c, argc, argv);
685 }
686 switch (argv[4][9]) {
687 case 'y':
688 case 'Y':
689 guest_ok = true;
690 break;
691 case 'n':
692 case 'N':
693 guest_ok = false;
694 break;
695 default:
696 TALLOC_FREE(ctx);
697 return net_usershare_add_usage(c, argc, argv);
698 }
699 break;
700 }
701
702 /* Ensure we're under the "usershare max shares" number. Advisory only. */
703 num_usershares = count_num_usershares();
704 if (num_usershares >= lp_usershare_max_shares()) {
705 d_fprintf(stderr,
706 _("net usershare add: maximum number of allowed "
707 "usershares (%d) reached\n"),
708 lp_usershare_max_shares() );
709 TALLOC_FREE(ctx);
710 return -1;
711 }
712
713 if (!validate_net_name(sharename, INVALID_SHARENAME_CHARS, strlen(sharename))) {
714 d_fprintf(stderr, _("net usershare add: share name %s contains "
715 "invalid characters (any of %s)\n"),
716 sharename, INVALID_SHARENAME_CHARS);
717 TALLOC_FREE(ctx);
718 return -1;
719 }
720
721 /* Disallow shares the same as users. */
722 if (getpwnam(sharename)) {
723 d_fprintf(stderr,
724 _("net usershare add: share name %s is already a valid "
725 "system user name\n"),
726 sharename );
727 TALLOC_FREE(ctx);
728 return -1;
729 }
730
731 /* Construct the full path for the usershare file. */
732 full_path = get_basepath(ctx);
733 if (!full_path) {
734 TALLOC_FREE(ctx);
735 return -1;
736 }
737 full_path_tmp = talloc_asprintf(ctx,
738 "%s/:tmpXXXXXX",
739 full_path);
740 if (!full_path_tmp) {
741 TALLOC_FREE(ctx);
742 return -1;
743 }
744
745 full_path = talloc_asprintf_append(full_path,
746 "/%s",
747 sharename);
748 if (!full_path) {
749 TALLOC_FREE(ctx);
750 return -1;
751 }
752
753 /* The path *must* be absolute. */
754 if (us_path[0] != '/') {
755 d_fprintf(stderr,
756 _("net usershare add: path %s is not an absolute "
757 "path.\n"),
758 us_path);
759 TALLOC_FREE(ctx);
760 return -1;
761 }
762
763 /* Check the directory to be shared exists. */
764 if (sys_stat(us_path, &sbuf, false) != 0) {
765 d_fprintf(stderr,
766 _("net usershare add: cannot stat path %s to ensure "
767 "this is a directory. Error was %s\n"),
768 us_path, strerror(errno) );
769 TALLOC_FREE(ctx);
770 return -1;
771 }
772
773 if (!S_ISDIR(sbuf.st_ex_mode)) {
774 d_fprintf(stderr,
775 _("net usershare add: path %s is not a directory.\n"),
776 us_path );
777 TALLOC_FREE(ctx);
778 return -1;
779 }
780
781 /* If we're not root, check if we're restricted to sharing out directories
782 that we own only. */
783
784 if ((myeuid != 0) && lp_usershare_owner_only() && (myeuid != sbuf.st_ex_uid)) {
785 d_fprintf(stderr, _("net usershare add: cannot share path %s as "
786 "we are restricted to only sharing directories we own.\n"
787 "\tAsk the administrator to add the line \"usershare owner only = false\" \n"
788 "\tto the [global] section of the smb.conf to allow this.\n"),
789 us_path );
790 TALLOC_FREE(ctx);
791 return -1;
792 }
793
794 /* No validation needed on comment. Now go through and validate the
795 acl string. Convert names to SID's as needed. Then run it through
796 parse_usershare_acl to ensure it's valid. */
797
798 /* Start off the string we'll append to. */
799 us_acl = talloc_strdup(ctx, "");
800 if (!us_acl) {
801 TALLOC_FREE(ctx);
802 return -1;
803 }
804
805 pacl = arg_acl;
806 num_aces = 1;
807
808 /* Add the number of ',' characters to get the number of aces. */
809 num_aces += count_chars(pacl,',');
810
811 for (i = 0; i < num_aces; i++) {
812 struct dom_sid sid;
813 const char *pcolon = strchr_m(pacl, ':');
814 const char *name;
815
816 if (pcolon == NULL) {
817 d_fprintf(stderr,
818 _("net usershare add: malformed acl %s "
819 "(missing ':').\n"),
820 pacl );
821 TALLOC_FREE(ctx);
822 return -1;
823 }
824
825 switch(pcolon[1]) {
826 case 'f':
827 case 'F':
828 case 'd':
829 case 'r':
830 case 'R':
831 break;
832 default:
833 d_fprintf(stderr,
834 _("net usershare add: malformed acl %s "
835 "(access control must be 'r', 'f', "
836 "or 'd')\n"),
837 pacl );
838 TALLOC_FREE(ctx);
839 return -1;
840 }
841
842 if (pcolon[2] != ',' && pcolon[2] != '\0') {
843 d_fprintf(stderr,
844 _("net usershare add: malformed terminating "
845 "character for acl %s\n"),
846 pacl );
847 TALLOC_FREE(ctx);
848 return -1;
849 }
850
851 /* Get the name */
852 if ((name = talloc_strndup(ctx, pacl, pcolon - pacl)) == NULL) {
853 d_fprintf(stderr, _("talloc_strndup failed\n"));
854 TALLOC_FREE(ctx);
855 return -1;
856 }
857 if (!string_to_sid(&sid, name)) {
858 /* Convert to a SID */
859 NTSTATUS ntstatus = net_lookup_sid_from_name(c, ctx, name, &sid);
860 if (!NT_STATUS_IS_OK(ntstatus)) {
861 d_fprintf(stderr,
862 _("net usershare add: cannot convert "
863 "name \"%s\" to a SID. %s."),
864 name, get_friendly_nt_error_msg(ntstatus) );
865 if (NT_STATUS_EQUAL(ntstatus, NT_STATUS_CONNECTION_REFUSED)) {
866 d_fprintf(stderr,
867 _(" Maybe smbd is not running.\n"));
868 } else {
869 d_fprintf(stderr, "\n");
870 }
871 TALLOC_FREE(ctx);
872 return -1;
873 }
874 }
875 us_acl = talloc_asprintf_append(
876 us_acl, "%s:%c,", sid_string_tos(&sid), pcolon[1]);
877
878 /* Move to the next ACL entry. */
879 if (pcolon[2] == ',') {
880 pacl = &pcolon[3];
881 }
882 }
883
884 /* Remove the last ',' */
885 us_acl[strlen(us_acl)-1] = '\0';
886
887 if (guest_ok && !lp_usershare_allow_guests()) {
888 d_fprintf(stderr, _("net usershare add: guest_ok=y requested "
889 "but the \"usershare allow guests\" parameter is not "
890 "enabled by this server.\n"));
891 TALLOC_FREE(ctx);
892 return -1;
893 }
894
895 /* Create a temporary filename for this share. */
896 tmpfd = mkstemp(full_path_tmp);
897
898 if (tmpfd == -1) {
899 d_fprintf(stderr,
900 _("net usershare add: cannot create tmp file %s\n"),
901 full_path_tmp );
902 TALLOC_FREE(ctx);
903 return -1;
904 }
905
906 /* Ensure we opened the file we thought we did. */
907 if (sys_lstat(full_path_tmp, &lsbuf, false) != 0) {
908 d_fprintf(stderr,
909 _("net usershare add: cannot lstat tmp file %s\n"),
910 full_path_tmp );
911 TALLOC_FREE(ctx);
912 close(tmpfd);
913 return -1;
914 }
915
916 /* Check this is the same as the file we opened. */
917 if (sys_fstat(tmpfd, &sbuf, false) != 0) {
918 d_fprintf(stderr,
919 _("net usershare add: cannot fstat tmp file %s\n"),
920 full_path_tmp );
921 TALLOC_FREE(ctx);
922 close(tmpfd);
923 return -1;
924 }
925
926 if (!S_ISREG(sbuf.st_ex_mode) || sbuf.st_ex_dev != lsbuf.st_ex_dev || sbuf.st_ex_ino != lsbuf.st_ex_ino) {
927 d_fprintf(stderr,
928 _("net usershare add: tmp file %s is not a regular "
929 "file ?\n"),
930 full_path_tmp );
931 TALLOC_FREE(ctx);
932 close(tmpfd);
933 return -1;
934 }
935
936 if (fchmod(tmpfd, 0644) == -1) {
937 d_fprintf(stderr,
938 _("net usershare add: failed to fchmod tmp file %s "
939 "to 0644n"),
940 full_path_tmp );
941 TALLOC_FREE(ctx);
942 close(tmpfd);
943 return -1;
944 }
945
946 /* Create the in-memory image of the file. */
947 file_img = talloc_strdup(ctx, "#VERSION 2\npath=");
948 file_img = talloc_asprintf_append(file_img,
949 "%s\ncomment=%s\nusershare_acl=%s\n"
950 "guest_ok=%c\nsharename=%s\n",
951 us_path,
952 us_comment,
953 us_acl,
954 guest_ok ? 'y' : 'n',
955 cp_sharename);
956
957 to_write = strlen(file_img);
958
959 if (write(tmpfd, file_img, to_write) != to_write) {
960 d_fprintf(stderr,
961 _("net usershare add: failed to write %u bytes to "
962 "file %s. Error was %s\n"),
963 (unsigned int)to_write, full_path_tmp, strerror(errno));
964 unlink(full_path_tmp);
965 TALLOC_FREE(ctx);
966 close(tmpfd);
967 return -1;
968 }
969
970 /* Attempt to replace any existing share by this name. */
971 if (rename(full_path_tmp, full_path) != 0) {
972 unlink(full_path_tmp);
973 d_fprintf(stderr,
974 _("net usershare add: failed to add share %s. Error "
975 "was %s\n"),
976 sharename, strerror(errno));
977 TALLOC_FREE(ctx);
978 close(tmpfd);
979 return -1;
980 }
981
982 close(tmpfd);
983
984 if (c->opt_long_list_entries) {
985 const char *my_argv[2];
986 my_argv[0] = sharename;
987 my_argv[1] = NULL;
988 net_usershare_info(c, 1, my_argv);
989 }
990
991 TALLOC_FREE(ctx);
992 return 0;
993}
994
995#if 0
996/***************************************************************************
997 List function.
998***************************************************************************/
999
1000static int list_fn(struct file_list *fl, void *priv)
1001{
1002 d_printf("%s\n", fl->pathname);
1003 return 0;
1004}
1005#endif
1006
1007/***************************************************************************
1008 List userlevel shares.
1009***************************************************************************/
1010
1011static int net_usershare_list(struct net_context *c, int argc,
1012 const char **argv)
1013{
1014 fstring wcard;
1015 bool only_ours = true;
1016 int ret = -1;
1017 struct us_priv_info pi;
1018 TALLOC_CTX *ctx;
1019
1020 fstrcpy(wcard, "*");
1021
1022 if (c->display_usage)
1023 return net_usershare_list_usage(c, argc, argv);
1024
1025 if (c->opt_long_list_entries) {
1026 only_ours = false;
1027 }
1028
1029 switch (argc) {
1030 case 0:
1031 break;
1032 case 1:
1033 fstrcpy(wcard, argv[0]);
1034 break;
1035 default:
1036 return net_usershare_list_usage(c, argc, argv);
1037 }
1038
1039 strlower_m(wcard);
1040
1041 ctx = talloc_init("share_list");
1042 ret = get_share_list(ctx, wcard, only_ours);
1043 if (ret) {
1044 return ret;
1045 }
1046
1047 pi.ctx = ctx;
1048 pi.op = US_LIST_OP;
1049 pi.c = c;
1050
1051 ret = process_share_list(info_fn, &pi);
1052 talloc_destroy(ctx);
1053 return ret;
1054}
1055
1056/***************************************************************************
1057 Entry-point for all the USERSHARE functions.
1058***************************************************************************/
1059
1060int net_usershare(struct net_context *c, int argc, const char **argv)
1061{
1062 SMB_STRUCT_DIR *dp;
1063
1064 struct functable func[] = {
1065 {
1066 "add",
1067 net_usershare_add,
1068 NET_TRANSPORT_LOCAL,
1069 N_("Add/modify user defined share"),
1070 N_("net usershare add\n"
1071 " Add/modify user defined share")
1072 },
1073 {
1074 "delete",
1075 net_usershare_delete,
1076 NET_TRANSPORT_LOCAL,
1077 N_("Delete user defined share"),
1078 N_("net usershare delete\n"
1079 " Delete user defined share")
1080 },
1081 {
1082 "info",
1083 net_usershare_info,
1084 NET_TRANSPORT_LOCAL,
1085 N_("Display information about a user defined share"),
1086 N_("net usershare info\n"
1087 " Display information about a user defined share")
1088 },
1089 {
1090 "list",
1091 net_usershare_list,
1092 NET_TRANSPORT_LOCAL,
1093 N_("List user defined shares"),
1094 N_("net usershare list\n"
1095 " List user defined shares")
1096 },
1097 {NULL, NULL, 0, NULL, NULL}
1098 };
1099
1100 if (lp_usershare_max_shares() == 0) {
1101 d_fprintf(stderr,
1102 _("net usershare: usershares are currently "
1103 "disabled\n"));
1104 return -1;
1105 }
1106
1107 dp = sys_opendir(lp_usershare_path());
1108 if (!dp) {
1109 int err = errno;
1110 d_fprintf(stderr,
1111 _("net usershare: cannot open usershare directory %s. "
1112 "Error %s\n"),
1113 lp_usershare_path(), strerror(err) );
1114 if (err == EACCES) {
1115 d_fprintf(stderr,
1116 _("You do not have permission to create a "
1117 "usershare. Ask your administrator to grant "
1118 "you permissions to create a share.\n"));
1119 } else if (err == ENOENT) {
1120 d_fprintf(stderr,
1121 _("Please ask your system administrator to "
1122 "enable user sharing.\n"));
1123 }
1124 return -1;
1125 }
1126 sys_closedir(dp);
1127
1128 return net_run_function(c, argc, argv, "net usershare", func);
1129}
Note: See TracBrowser for help on using the repository browser.