599 lines
13 KiB
C
599 lines
13 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2017 Kyle J. Kneitinger <kyle@kneit.in>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <errno.h>
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#include <libutil.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <time.h>
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#include <unistd.h>
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#include <be.h>
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#include "bectl.h"
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static int bectl_cmd_activate(int argc, char *argv[]);
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static int bectl_cmd_check(int argc, char *argv[]);
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static int bectl_cmd_create(int argc, char *argv[]);
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static int bectl_cmd_destroy(int argc, char *argv[]);
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static int bectl_cmd_export(int argc, char *argv[]);
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static int bectl_cmd_import(int argc, char *argv[]);
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#if SOON
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static int bectl_cmd_add(int argc, char *argv[]);
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#endif
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static int bectl_cmd_mount(int argc, char *argv[]);
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static int bectl_cmd_rename(int argc, char *argv[]);
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static int bectl_cmd_unmount(int argc, char *argv[]);
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libbe_handle_t *be;
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int
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usage(bool explicit)
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{
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FILE *fp;
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fp = explicit ? stdout : stderr;
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fprintf(fp, "%s",
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"Usage:\tbectl {-h | -? | subcommand [args...]}\n"
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#if SOON
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"\tbectl [-r beroot] add (path)*\n"
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#endif
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"\tbectl [-r beroot] activate [-t] beName\n"
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"\tbectl [-r beroot] activate [-T]\n"
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"\tbectl [-r beroot] check\n"
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"\tbectl [-r beroot] create [-r] [-e {nonActiveBe | beName@snapshot}] beName\n"
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"\tbectl [-r beroot] create [-r] beName@snapshot\n"
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"\tbectl [-r beroot] destroy [-Fo] {beName | beName@snapshot}\n"
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"\tbectl [-r beroot] export sourceBe\n"
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"\tbectl [-r beroot] import targetBe\n"
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"\tbectl [-r beroot] jail [-bU] [{-o key=value | -u key}]... beName\n"
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"\t [utility [argument ...]]\n"
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"\tbectl [-r beroot] list [-aDHs] [{-c property | -C property}]\n"
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"\tbectl [-r beroot] mount beName [mountpoint]\n"
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"\tbectl [-r beroot] rename origBeName newBeName\n"
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"\tbectl [-r beroot] {ujail | unjail} {jailID | jailName | beName}\n"
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"\tbectl [-r beroot] {umount | unmount} [-f] beName\n");
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return (explicit ? 0 : EX_USAGE);
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}
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/*
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* Represents a relationship between the command name and the parser action
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* that handles it.
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*/
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struct command_map_entry {
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const char *command;
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int (*fn)(int argc, char *argv[]);
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/* True if libbe_print_on_error should be disabled */
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bool silent;
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};
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static struct command_map_entry command_map[] =
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{
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{ "activate", bectl_cmd_activate,false },
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{ "create", bectl_cmd_create, false },
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{ "destroy", bectl_cmd_destroy, false },
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{ "export", bectl_cmd_export, false },
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{ "import", bectl_cmd_import, false },
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#if SOON
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{ "add", bectl_cmd_add, false },
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#endif
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{ "jail", bectl_cmd_jail, false },
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{ "list", bectl_cmd_list, false },
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{ "mount", bectl_cmd_mount, false },
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{ "rename", bectl_cmd_rename, false },
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{ "unjail", bectl_cmd_unjail, false },
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{ "unmount", bectl_cmd_unmount, false },
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{ "check", bectl_cmd_check, true },
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};
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static struct command_map_entry *
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get_cmd_info(const char *cmd)
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{
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size_t i;
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for (i = 0; i < nitems(command_map); ++i) {
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if (strcmp(cmd, command_map[i].command) == 0)
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return (&command_map[i]);
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}
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return (NULL);
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}
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static int
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bectl_cmd_activate(int argc, char *argv[])
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{
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int err, opt;
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bool temp, reset;
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temp = false;
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reset = false;
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while ((opt = getopt(argc, argv, "tT")) != -1) {
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switch (opt) {
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case 't':
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if (reset)
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return (usage(false));
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temp = true;
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break;
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case 'T':
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if (temp)
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return (usage(false));
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reset = true;
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break;
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default:
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fprintf(stderr, "bectl activate: unknown option '-%c'\n",
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optopt);
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return (usage(false));
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 1 && (!reset || argc != 0)) {
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fprintf(stderr, "bectl activate: wrong number of arguments\n");
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return (usage(false));
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}
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if (reset) {
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if ((err = be_deactivate(be, NULL, reset)) == 0)
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printf("Temporary activation removed\n");
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else
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printf("Failed to remove temporary activation\n");
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return (err);
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}
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/* activate logic goes here */
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if ((err = be_activate(be, argv[0], temp)) != 0)
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/* XXX TODO: more specific error msg based on err */
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printf("Did not successfully activate boot environment %s\n",
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argv[0]);
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else
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printf("Successfully activated boot environment %s\n", argv[0]);
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if (temp)
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printf("for next boot\n");
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return (err);
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}
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/*
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* TODO: when only one arg is given, and it contains an "@" the this should
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* create that snapshot
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*/
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static int
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bectl_cmd_create(int argc, char *argv[])
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{
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char snapshot[BE_MAXPATHLEN];
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char *atpos, *bootenv, *snapname;
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int err, opt;
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bool recursive;
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snapname = NULL;
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recursive = false;
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while ((opt = getopt(argc, argv, "e:r")) != -1) {
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switch (opt) {
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case 'e':
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snapname = optarg;
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break;
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case 'r':
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recursive = true;
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break;
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default:
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fprintf(stderr, "bectl create: unknown option '-%c'\n",
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optopt);
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return (usage(false));
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 1) {
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fprintf(stderr, "bectl create: wrong number of arguments\n");
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return (usage(false));
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}
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bootenv = *argv;
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err = BE_ERR_SUCCESS;
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if ((atpos = strchr(bootenv, '@')) != NULL) {
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/*
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* This is the "create a snapshot variant". No new boot
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* environment is to be created here.
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*/
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*atpos++ = '\0';
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err = be_snapshot(be, bootenv, atpos, recursive, NULL);
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} else {
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if (snapname == NULL)
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/* Create from currently booted BE */
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err = be_snapshot(be, be_active_path(be), NULL,
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recursive, snapshot);
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else if (strchr(snapname, '@') != NULL)
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/* Create from given snapshot */
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strlcpy(snapshot, snapname, sizeof(snapshot));
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else
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/* Create from given BE */
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err = be_snapshot(be, snapname, NULL, recursive,
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snapshot);
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if (err == BE_ERR_SUCCESS)
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err = be_create_depth(be, bootenv, snapshot,
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recursive == true ? -1 : 0);
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}
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switch (err) {
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case BE_ERR_SUCCESS:
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break;
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case BE_ERR_INVALIDNAME:
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fprintf(stderr,
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"bectl create: boot environment name must not contain spaces\n");
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break;
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default:
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if (atpos != NULL)
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fprintf(stderr,
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"Failed to create a snapshot '%s' of '%s'\n",
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atpos, bootenv);
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else if (snapname == NULL)
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fprintf(stderr,
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"Failed to create bootenv %s\n", bootenv);
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else
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fprintf(stderr,
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"Failed to create bootenv %s from snapshot %s\n",
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bootenv, snapname);
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}
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return (err);
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}
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static int
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bectl_cmd_export(int argc, char *argv[])
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{
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char *bootenv;
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if (argc == 1) {
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fprintf(stderr, "bectl export: missing boot environment name\n");
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return (usage(false));
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}
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if (argc > 2) {
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fprintf(stderr, "bectl export: extra arguments provided\n");
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return (usage(false));
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}
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bootenv = argv[1];
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if (isatty(STDOUT_FILENO)) {
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fprintf(stderr, "bectl export: must redirect output\n");
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return (EX_USAGE);
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}
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be_export(be, bootenv, STDOUT_FILENO);
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return (0);
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}
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static int
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bectl_cmd_import(int argc, char *argv[])
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{
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char *bootenv;
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int err;
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if (argc == 1) {
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fprintf(stderr, "bectl import: missing boot environment name\n");
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return (usage(false));
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}
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if (argc > 2) {
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fprintf(stderr, "bectl import: extra arguments provided\n");
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return (usage(false));
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}
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bootenv = argv[1];
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if (isatty(STDIN_FILENO)) {
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fprintf(stderr, "bectl import: input can not be from terminal\n");
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return (EX_USAGE);
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}
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err = be_import(be, bootenv, STDIN_FILENO);
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return (err);
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}
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#if SOON
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static int
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bectl_cmd_add(int argc, char *argv[])
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{
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if (argc < 2) {
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fprintf(stderr, "bectl add: must provide at least one path\n");
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return (usage(false));
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}
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for (int i = 1; i < argc; ++i) {
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printf("arg %d: %s\n", i, argv[i]);
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/* XXX TODO catch err */
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be_add_child(be, argv[i], true);
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}
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return (0);
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}
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#endif
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static int
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bectl_cmd_destroy(int argc, char *argv[])
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{
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nvlist_t *props;
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char *target, targetds[BE_MAXPATHLEN];
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const char *origin;
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int err, flags, opt;
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flags = 0;
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while ((opt = getopt(argc, argv, "Fo")) != -1) {
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switch (opt) {
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case 'F':
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flags |= BE_DESTROY_FORCE;
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break;
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case 'o':
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flags |= BE_DESTROY_ORIGIN;
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break;
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default:
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fprintf(stderr, "bectl destroy: unknown option '-%c'\n",
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optopt);
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return (usage(false));
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 1) {
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fprintf(stderr, "bectl destroy: wrong number of arguments\n");
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return (usage(false));
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}
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target = argv[0];
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/* We'll emit a notice if there's an origin to be cleaned up */
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if ((flags & BE_DESTROY_ORIGIN) == 0 && strchr(target, '@') == NULL) {
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flags |= BE_DESTROY_AUTOORIGIN;
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if (be_root_concat(be, target, targetds) != 0)
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goto destroy;
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if (be_prop_list_alloc(&props) != 0)
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goto destroy;
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if (be_get_dataset_props(be, targetds, props) != 0) {
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be_prop_list_free(props);
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goto destroy;
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}
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if (nvlist_lookup_string(props, "origin", &origin) == 0 &&
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!be_is_auto_snapshot_name(be, origin))
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fprintf(stderr, "bectl destroy: leaving origin '%s' intact\n",
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origin);
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be_prop_list_free(props);
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}
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destroy:
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err = be_destroy(be, target, flags);
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return (err);
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}
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static int
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bectl_cmd_mount(int argc, char *argv[])
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{
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char result_loc[BE_MAXPATHLEN];
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char *bootenv, *mountpoint;
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int err, mntflags;
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/* XXX TODO: Allow shallow */
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mntflags = BE_MNT_DEEP;
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if (argc < 2) {
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fprintf(stderr, "bectl mount: missing argument(s)\n");
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return (usage(false));
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}
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if (argc > 3) {
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fprintf(stderr, "bectl mount: too many arguments\n");
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return (usage(false));
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}
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bootenv = argv[1];
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mountpoint = ((argc == 3) ? argv[2] : NULL);
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err = be_mount(be, bootenv, mountpoint, mntflags, result_loc);
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switch (err) {
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case BE_ERR_SUCCESS:
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printf("Successfully mounted %s at %s\n", bootenv, result_loc);
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break;
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default:
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fprintf(stderr,
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(argc == 3) ? "Failed to mount bootenv %s at %s\n" :
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"Failed to mount bootenv %s at temporary path %s\n",
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bootenv, mountpoint);
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}
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return (err);
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}
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static int
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bectl_cmd_rename(int argc, char *argv[])
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{
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char *dest, *src;
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int err;
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if (argc < 3) {
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fprintf(stderr, "bectl rename: missing argument\n");
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return (usage(false));
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}
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if (argc > 3) {
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fprintf(stderr, "bectl rename: too many arguments\n");
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return (usage(false));
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}
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src = argv[1];
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dest = argv[2];
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err = be_rename(be, src, dest);
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switch (err) {
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case BE_ERR_SUCCESS:
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break;
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default:
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fprintf(stderr, "Failed to rename bootenv %s to %s\n",
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src, dest);
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}
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return (err);
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}
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static int
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bectl_cmd_unmount(int argc, char *argv[])
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{
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char *bootenv, *cmd;
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int err, flags, opt;
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/* Store alias used */
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cmd = argv[0];
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flags = 0;
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while ((opt = getopt(argc, argv, "f")) != -1) {
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switch (opt) {
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case 'f':
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flags |= BE_MNT_FORCE;
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break;
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default:
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fprintf(stderr, "bectl %s: unknown option '-%c'\n",
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cmd, optopt);
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return (usage(false));
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 1) {
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fprintf(stderr, "bectl %s: wrong number of arguments\n", cmd);
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return (usage(false));
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}
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bootenv = argv[0];
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err = be_unmount(be, bootenv, flags);
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switch (err) {
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case BE_ERR_SUCCESS:
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break;
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default:
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fprintf(stderr, "Failed to unmount bootenv %s\n", bootenv);
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}
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return (err);
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}
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static int
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bectl_cmd_check(int argc, char *argv[] __unused)
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{
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/* The command is left as argv[0] */
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if (argc != 1) {
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fprintf(stderr, "bectl check: wrong number of arguments\n");
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return (usage(false));
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}
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return (0);
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}
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int
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main(int argc, char *argv[])
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|
{
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struct command_map_entry *cmd;
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const char *command;
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char *root;
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int rc;
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cmd = NULL;
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root = NULL;
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if (argc < 2)
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return (usage(false));
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|
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if (strcmp(argv[1], "-r") == 0) {
|
|
if (argc < 4)
|
|
return (usage(false));
|
|
root = strdup(argv[2]);
|
|
command = argv[3];
|
|
argc -= 3;
|
|
argv += 3;
|
|
} else {
|
|
command = argv[1];
|
|
argc -= 1;
|
|
argv += 1;
|
|
}
|
|
|
|
/* Handle command aliases */
|
|
if (strcmp(command, "umount") == 0)
|
|
command = "unmount";
|
|
|
|
if (strcmp(command, "ujail") == 0)
|
|
command = "unjail";
|
|
|
|
if ((strcmp(command, "-?") == 0) || (strcmp(command, "-h") == 0))
|
|
return (usage(true));
|
|
|
|
if ((cmd = get_cmd_info(command)) == NULL) {
|
|
fprintf(stderr, "Unknown command: %s\n", command);
|
|
return (usage(false));
|
|
}
|
|
|
|
if ((be = libbe_init(root)) == NULL) {
|
|
if (!cmd->silent)
|
|
fprintf(stderr, "libbe_init(\"%s\") failed.\n",
|
|
root != NULL ? root : "");
|
|
return (-1);
|
|
}
|
|
|
|
libbe_print_on_error(be, !cmd->silent);
|
|
|
|
rc = cmd->fn(argc, argv);
|
|
|
|
libbe_close(be);
|
|
return (rc);
|
|
}
|