2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public
4 * License v2 as published by the Free Software Foundation.
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
9 * General Public License for more details.
11 * You should have received a copy of the GNU General Public
12 * License along with this program; if not, write to the
13 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
14 * Boston, MA 021110-1307, USA.
27 static const char * const btrfs_cmd_group_usage
[] = {
28 "btrfs [--help] [--version] <group> [<group>...] <command> [<args>]",
32 static const char btrfs_cmd_group_info
[] =
33 "Use --help as an argument for information on a specific group or command.";
35 static inline const char *skip_prefix(const char *str
, const char *prefix
)
37 size_t len
= strlen(prefix
);
38 return strncmp(str
, prefix
, len
) ? NULL
: str
+ len
;
41 int prefixcmp(const char *str
, const char *prefix
)
43 for (; ; str
++, prefix
++)
46 else if (*str
!= *prefix
)
47 return (unsigned char)*prefix
- (unsigned char)*str
;
50 static int parse_one_token(const char *arg
, const struct cmd_group
*grp
,
51 const struct cmd_struct
**cmd_ret
)
53 const struct cmd_struct
*cmd
= grp
->commands
;
54 const struct cmd_struct
*abbrev_cmd
= NULL
, *ambiguous_cmd
= NULL
;
56 for (; cmd
->token
; cmd
++) {
59 rest
= skip_prefix(arg
, cmd
->token
);
61 if (!prefixcmp(cmd
->token
, arg
)) {
64 * If this is abbreviated, it is
65 * ambiguous. So when there is no
66 * exact match later, we need to
69 ambiguous_cmd
= abbrev_cmd
;
86 *cmd_ret
= abbrev_cmd
;
93 static const struct cmd_struct
*
94 parse_command_token(const char *arg
, const struct cmd_group
*grp
)
96 const struct cmd_struct
*cmd
= NULL
;
98 switch(parse_one_token(arg
, grp
, &cmd
)) {
100 help_unknown_token(arg
, grp
);
102 help_ambiguous_token(arg
, grp
);
108 static void handle_help_options_next_level(const struct cmd_struct
*cmd
,
109 int argc
, char **argv
)
114 if (!strcmp(argv
[1], "--help")) {
118 help_command_group(cmd
->next
, argc
, argv
);
120 usage_command(cmd
, 1, 0);
127 int handle_command_group(const struct cmd_group
*grp
, int argc
,
131 const struct cmd_struct
*cmd
;
136 usage_command_group(grp
, 0, 0);
140 cmd
= parse_command_token(argv
[0], grp
);
142 handle_help_options_next_level(cmd
, argc
, argv
);
144 fixup_argv0(argv
, cmd
->token
);
145 return cmd
->fn(argc
, argv
);
148 static const struct cmd_group btrfs_cmd_group
;
150 static const char * const cmd_help_usage
[] = {
151 "btrfs help [--full]",
152 "Display help information",
154 "--full display detailed help on every command",
158 static int cmd_help(int argc
, char **argv
)
160 help_command_group(&btrfs_cmd_group
, argc
, argv
);
164 static const char * const cmd_version_usage
[] = {
166 "Display btrfs-progs version",
170 static int cmd_version(int argc
, char **argv
)
172 printf("%s\n", BTRFS_BUILD_VERSION
);
176 static void handle_options(int *argc
, char ***argv
)
179 const char *arg
= (*argv
)[0];
181 !strcmp(arg
, "--help") ||
182 !strcmp(arg
, "--version"))
184 fprintf(stderr
, "Unknown option: %s\n", arg
);
185 fprintf(stderr
, "usage: %s\n",
186 btrfs_cmd_group
.usagestr
[0]);
192 static const struct cmd_group btrfs_cmd_group
= {
193 btrfs_cmd_group_usage
, btrfs_cmd_group_info
, {
194 { "subvolume", cmd_subvolume
, NULL
, &subvolume_cmd_group
, 0 },
195 { "filesystem", cmd_filesystem
, NULL
, &filesystem_cmd_group
, 0 },
196 { "balance", cmd_balance
, NULL
, &balance_cmd_group
, 0 },
197 { "device", cmd_device
, NULL
, &device_cmd_group
, 0 },
198 { "scrub", cmd_scrub
, NULL
, &scrub_cmd_group
, 0 },
199 { "check", cmd_check
, cmd_check_usage
, NULL
, 0 },
200 { "rescue", cmd_rescue
, NULL
, &rescue_cmd_group
, 0 },
201 { "restore", cmd_restore
, cmd_restore_usage
, NULL
, 0 },
202 { "inspect-internal", cmd_inspect
, NULL
, &inspect_cmd_group
, 0 },
203 { "property", cmd_property
, NULL
, &property_cmd_group
, 0 },
204 { "send", cmd_send
, cmd_send_usage
, NULL
, 0 },
205 { "receive", cmd_receive
, cmd_receive_usage
, NULL
, 0 },
206 { "quota", cmd_quota
, NULL
, "a_cmd_group
, 0 },
207 { "qgroup", cmd_qgroup
, NULL
, &qgroup_cmd_group
, 0 },
208 { "replace", cmd_replace
, NULL
, &replace_cmd_group
, 0 },
209 { "help", cmd_help
, cmd_help_usage
, NULL
, 0 },
210 { "version", cmd_version
, cmd_version_usage
, NULL
, 0 },
215 int main(int argc
, char **argv
)
217 const struct cmd_struct
*cmd
;
220 if ((bname
= strrchr(argv
[0], '/')) != NULL
)
225 if (!strcmp(bname
, "btrfsck")) {
230 handle_options(&argc
, &argv
);
232 if (!prefixcmp(argv
[0], "--"))
235 usage_command_group(&btrfs_cmd_group
, 0, 0);
240 cmd
= parse_command_token(argv
[0], &btrfs_cmd_group
);
242 handle_help_options_next_level(cmd
, argc
, argv
);
244 crc32c_optimization_init();
246 fixup_argv0(argv
, cmd
->token
);
247 exit(cmd
->fn(argc
, argv
));