4 * Copyright (c) 2017 Kyle J. Kneitinger <kyle@kneit.in>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/param.h>
31 #include <sys/mount.h>
44 static int bectl_cmd_activate(int argc, char *argv[]);
45 static int bectl_cmd_create(int argc, char *argv[]);
46 static int bectl_cmd_destroy(int argc, char *argv[]);
47 static int bectl_cmd_export(int argc, char *argv[]);
48 static int bectl_cmd_import(int argc, char *argv[]);
49 static int bectl_cmd_add(int argc, char *argv[]);
50 static int bectl_cmd_jail(int argc, char *argv[]);
51 static int bectl_cmd_list(int argc, char *argv[]);
52 static int bectl_cmd_mount(int argc, char *argv[]);
53 static int bectl_cmd_rename(int argc, char *argv[]);
54 static int bectl_search_jail_paths(const char *mnt);
55 static int bectl_locate_jail(const char *ident);
56 static int bectl_cmd_unjail(int argc, char *argv[]);
57 static int bectl_cmd_unmount(int argc, char *argv[]);
59 static libbe_handle_t *be;
66 fp = explicit ? stdout : stderr;
68 "usage:\tbectl ( -h | -? | subcommand [args...] )\n"
69 "\tbectl activate [-t] beName\n"
70 "\tbectl create [-e nonActiveBe | -e beName@snapshot] beName\n"
71 "\tbectl create beName@snapshot\n"
72 "\tbectl destroy [-F] beName | beName@snapshot⟩\n"
73 "\tbectl export sourceBe\n"
74 "\tbectl import targetBe\n"
75 "\tbectl add (path)*\n"
76 "\tbectl jail bootenv\n"
77 "\tbectl list [-a] [-D] [-H] [-s]\n"
78 "\tbectl mount beName [mountpoint]\n"
79 "\tbectl rename origBeName newBeName\n"
80 "\tbectl { ujail | unjail } ⟨jailID | jailName | bootenv)\n"
81 "\tbectl { umount | unmount } [-f] beName\n");
83 return (explicit ? 0 : EX_USAGE);
88 * Represents a relationship between the command name and the parser action
91 struct command_map_entry {
93 int (*fn)(int argc, char *argv[]);
96 static struct command_map_entry command_map[] =
98 { "activate", bectl_cmd_activate },
99 { "create", bectl_cmd_create },
100 { "destroy", bectl_cmd_destroy },
101 { "export", bectl_cmd_export },
102 { "import", bectl_cmd_import },
103 { "add", bectl_cmd_add },
104 { "jail", bectl_cmd_jail },
105 { "list", bectl_cmd_list },
106 { "mount", bectl_cmd_mount },
107 { "rename", bectl_cmd_rename },
108 { "unjail", bectl_cmd_unjail },
109 { "unmount", bectl_cmd_unmount },
113 get_cmd_index(const char *cmd, int *index)
117 map_size = nitems(command_map);
118 for (int i = 0; i < map_size; ++i) {
119 if (strcmp(cmd, command_map[i].command) == 0) {
130 bectl_cmd_activate(int argc, char *argv[])
136 while ((opt = getopt(argc, argv, "t")) != -1) {
142 fprintf(stderr, "bectl activate: unknown option '-%c'\n",
144 return (usage(false));
152 fprintf(stderr, "bectl activate: wrong number of arguments\n");
153 return (usage(false));
157 /* activate logic goes here */
158 if ((err = be_activate(be, argv[0], temp)) != 0)
159 /* XXX TODO: more specific error msg based on err */
160 printf("did not successfully activate boot environment %s\n",
163 printf("successfully activated boot environment %s\n", argv[0]);
166 printf("for next boot\n");
173 * TODO: when only one arg is given, and it contains an "@" the this should
174 * create that snapshot
177 bectl_cmd_create(int argc, char *argv[])
179 char *bootenv, *snapname, *source;
183 while ((opt = getopt(argc, argv, "e:")) != -1) {
189 fprintf(stderr, "bectl create: unknown option '-%c'\n",
191 return (usage(false));
199 fprintf(stderr, "bectl create: wrong number of arguments\n");
200 return (usage(false));
205 if (snapname != NULL) {
206 if (strchr(snapname, '@') != NULL)
207 err = be_create_from_existing_snap(be, bootenv,
210 err = be_create_from_existing(be, bootenv, snapname);
212 if ((snapname = strchr(bootenv, '@')) != NULL) {
213 *(snapname++) = '\0';
214 if ((err = be_snapshot(be, be_active_path(be),
215 snapname, true, NULL)) != BE_ERR_SUCCESS)
216 fprintf(stderr, "failed to create snapshot\n");
217 asprintf(&source, "%s@%s", be_active_path(be), snapname);
218 err = be_create_from_existing_snap(be, bootenv,
222 err = be_create(be, bootenv);
229 if (snapname == NULL)
231 "failed to create bootenv %s\n", bootenv);
234 "failed to create bootenv %s from snapshot %s\n",
243 bectl_cmd_export(int argc, char *argv[])
248 fprintf(stderr, "bectl export: missing boot environment name\n");
249 return (usage(false));
253 fprintf(stderr, "bectl export: extra arguments provided\n");
254 return (usage(false));
259 if (isatty(STDOUT_FILENO)) {
260 fprintf(stderr, "bectl export: must redirect output\n");
264 be_export(be, bootenv, STDOUT_FILENO);
271 bectl_cmd_import(int argc, char *argv[])
277 fprintf(stderr, "bectl import: missing boot environment name\n");
278 return (usage(false));
282 fprintf(stderr, "bectl import: extra arguments provided\n");
283 return (usage(false));
288 if (isatty(STDIN_FILENO)) {
289 fprintf(stderr, "bectl import: input can not be from terminal\n");
293 err = be_import(be, bootenv, STDIN_FILENO);
300 bectl_cmd_add(int argc, char *argv[])
304 fprintf(stderr, "bectl add: must provide at least one path\n");
305 return (usage(false));
308 for (int i = 1; i < argc; ++i) {
309 printf("arg %d: %s\n", i, argv[i]);
310 /* XXX TODO catch err */
311 be_add_child(be, argv[i], true);
319 bectl_cmd_destroy(int argc, char *argv[])
326 while ((opt = getopt(argc, argv, "F")) != -1) {
332 fprintf(stderr, "bectl destroy: unknown option '-%c'\n",
334 return (usage(false));
342 fprintf(stderr, "bectl destroy: wrong number of arguments\n");
343 return (usage(false));
348 err = be_destroy(be, target, force);
355 bectl_cmd_jail(int argc, char *argv[])
358 char mnt_loc[BE_MAXPATHLEN];
361 /* struct jail be_jail = { 0 }; */
364 fprintf(stderr, "bectl jail: missing boot environment name\n");
365 return (usage(false));
368 fprintf(stderr, "bectl jail: too many arguments\n");
369 return (usage(false));
375 * XXX TODO: if its already mounted, perhaps there should be a flag to
376 * indicate its okay to proceed??
378 if ((err = be_mount(be, bootenv, NULL, 0, mnt_loc)) != BE_ERR_SUCCESS) {
379 fprintf(stderr, "could not mount bootenv\n");
383 /* XXX TODO: Make the IP/hostname configurable? */
384 jid = jail_setv(JAIL_CREATE | JAIL_ATTACH,
387 "host.hostname", bootenv,
389 "ip4.addr", "10.20.30.40",
390 "allow.mount", "true",
391 "allow.mount.devfs", "true",
392 "enforce_statfs", "1",
395 fprintf(stderr, "unable to create jail. error: %d\n", errno);
399 /* We're attached within the jail... good bye! */
401 execl("/bin/sh", "/bin/sh", NULL);
407 bectl_cmd_list(int argc, char *argv[])
411 bool show_all_datasets, show_space, hide_headers, show_snaps;
414 show_all_datasets = show_space = hide_headers = show_snaps = false;
415 while ((opt = getopt(argc, argv, "aDHs")) != -1) {
418 show_all_datasets = true;
430 fprintf(stderr, "bectl list: unknown option '-%c'\n",
432 return (usage(false));
439 fprintf(stderr, "bectl list: extra argument provided\n");
440 return (usage(false));
443 if (be_prop_list_alloc(&props) != 0) {
444 fprintf(stderr, "bectl list: failed to allocate prop nvlist\n");
447 if (be_get_bootenv_props(be, props) != 0) {
448 /* XXX TODO: Real errors */
449 fprintf(stderr, "bectl list: failed to fetch boot environments\n");
453 dump_nvlist(props, 0);
454 be_prop_list_free(props);
461 bectl_cmd_mount(int argc, char *argv[])
463 char result_loc[BE_MAXPATHLEN];
464 char *bootenv, *mountpoint;
468 fprintf(stderr, "bectl mount: missing argument(s)\n");
469 return (usage(false));
473 fprintf(stderr, "bectl mount: too many arguments\n");
474 return (usage(false));
478 mountpoint = ((argc == 3) ? argv[2] : NULL);
480 err = be_mount(be, bootenv, mountpoint, 0, result_loc);
484 printf("successfully mounted %s at %s\n", bootenv, result_loc);
488 (argc == 3) ? "failed to mount bootenv %s at %s\n" :
489 "failed to mount bootenv %s at temporary path %s\n",
490 bootenv, mountpoint);
498 bectl_cmd_rename(int argc, char *argv[])
504 fprintf(stderr, "bectl rename: missing argument\n");
505 return (usage(false));
509 fprintf(stderr, "bectl rename: too many arguments\n");
510 return (usage(false));
516 err = be_rename(be, src, dest);
522 fprintf(stderr, "failed to rename bootenv %s to %s\n",
530 bectl_search_jail_paths(const char *mnt)
532 char jailpath[MAXPATHLEN + 1];
537 while ((jid = jail_getv(0, "lastjid", &jid, "path", &jailpath,
539 if (strcmp(jailpath, mnt) == 0)
547 * Locate a jail based on an arbitrary identifier. This may be either a name,
548 * a jid, or a BE name. Returns the jid or -1 on failure.
551 bectl_locate_jail(const char *ident)
553 nvlist_t *belist, *props;
557 /* Try the easy-match first */
558 jid = jail_getid(ident);
562 /* Attempt to try it as a BE name, first */
563 if (be_prop_list_alloc(&belist) != 0)
566 if (be_get_bootenv_props(be, belist) != 0)
569 if (nvlist_lookup_nvlist(belist, ident, &props) == 0) {
570 /* We'll attempt to resolve the jid by way of mountpoint */
571 if (nvlist_lookup_string(props, "mountpoint", &mnt) == 0) {
572 jid = bectl_search_jail_paths(mnt);
573 be_prop_list_free(belist);
577 be_prop_list_free(belist);
584 bectl_cmd_unjail(int argc, char *argv[])
586 char path[MAXPATHLEN + 1];
587 char *cmd, *name, *target;
590 /* Store alias used */
594 fprintf(stderr, "bectl %s: wrong number of arguments\n", cmd);
595 return (usage(false));
600 /* Locate the jail */
601 if ((jid = bectl_locate_jail(target)) == -1) {
602 fprintf(stderr, "bectl %s: failed to locate BE by '%s'\n", cmd, target);
606 bzero(&path, MAXPATHLEN + 1);
607 name = jail_getname(jid);
608 if (jail_getv(0, "name", name, "path", path, NULL) != jid) {
610 fprintf(stderr, "bectl %s: failed to get path for jail requested by '%s'\n", cmd, target);
616 if (be_mounted_at(be, path, NULL) != 0) {
617 fprintf(stderr, "bectl %s: jail requested by '%s' not a BE\n", cmd, target);
629 bectl_cmd_unmount(int argc, char *argv[])
634 /* Store alias used */
638 while ((opt = getopt(argc, argv, "f")) != -1) {
641 flags |= BE_MNT_FORCE;
644 fprintf(stderr, "bectl %s: unknown option '-%c'\n",
646 return (usage(false));
654 fprintf(stderr, "bectl %s: wrong number of arguments\n", cmd);
655 return (usage(false));
660 err = be_unmount(be, bootenv, flags);
666 fprintf(stderr, "failed to unmount bootenv %s\n", bootenv);
674 main(int argc, char *argv[])
677 int command_index, rc;
680 fprintf(stderr, "missing command\n");
681 return (usage(false));
686 /* Handle command aliases */
687 if (strcmp(command, "umount") == 0)
690 if (strcmp(command, "ujail") == 0)
693 if ((strcmp(command, "-?") == 0) || (strcmp(command, "-h") == 0))
694 return (usage(true));
696 if (get_cmd_index(command, &command_index)) {
697 fprintf(stderr, "unknown command: %s\n", command);
698 return (usage(false));
702 if ((be = libbe_init()) == NULL)
705 libbe_print_on_error(be, true);
707 /* XXX TODO: can be simplified if offset by 2 instead of one */
708 rc = command_map[command_index].fn(argc-1, argv+1);