commands.h

   1 /*
   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.
   5  *
   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.
  10  *
  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.
  15  */
  16
  17 #ifndef __BTRFS_COMMANDS_H__
  18 #define __BTRFS_COMMANDS_H__
  19
  20 enum {
  21         CMD_HIDDEN = (1 << 0),  /* should not be in help listings */
  22         CMD_ALIAS = (1 << 1),   /* alias of next command in cmd_group */
  23 };
  24
  25 struct cmd_struct {
  26         const char *token;
  27         int (*fn)(int, char **);
  28
  29         /*
  30          * Usage strings
  31          *
  32          * A NULL-terminated array of the following format:
  33          *
  34          *   usagestr[0] - one-line synopsis (required)
  35          *   usagestr[1] - one-line short description (required)
  36          *   usagestr[2..m] - a long (possibly multi-line) description
  37          *                    (optional)
  38          *   usagestr[m + 1] - an empty line separator (required if at least one
  39          *                     option string is given, not needed otherwise)
  40          *   usagestr[m + 2..n] - option strings, one option per line
  41          *                        (optional)
  42          *   usagestr[n + 1] - NULL terminator
  43          *
  44          * Options (if present) should always (even if there is no long
  45          * description) be prepended with an empty line.  Supplied strings are
  46          * indented but otherwise printed as-is, no automatic wrapping is done.
  47          *
  48          * Grep for cmd_*_usage[] for examples.
  49          */
  50         const char * const *usagestr;
  51
  52         /* should be NULL if token is not a subgroup */
  53         const struct cmd_group *next;
  54
  55         /* CMD_* flags above */
  56         int flags;
  57 };
  58
  59 #define NULL_CMD_STRUCT {NULL, NULL, NULL, NULL, 0}
  60
  61 struct cmd_group {
  62         const char * const *usagestr;
  63         const char *infostr;
  64
  65         const struct cmd_struct commands[];
  66 };
  67
  68 /* btrfs.c */
  69 int prefixcmp(const char *str, const char *prefix);
  70
  71 int handle_command_group(const struct cmd_group *grp, int argc,
  72                          char **argv);
  73
  74 /* help.c */
  75 extern const char * const generic_cmd_help_usage[];
  76
  77 void usage(const char * const *usagestr) __attribute__((noreturn));
  78 void usage_command(const struct cmd_struct *cmd, int full, int err);
  79 void usage_command_group(const struct cmd_group *grp, int all, int err);
  80 void usage_command_group_short(const struct cmd_group *grp);
  81
  82 void help_unknown_token(const char *arg, const struct cmd_group *grp) __attribute__((noreturn));
  83 void help_ambiguous_token(const char *arg, const struct cmd_group *grp) __attribute__((noreturn));
  84
  85 void help_command_group(const struct cmd_group *grp, int argc, char **argv);
  86
  87 extern const struct cmd_group subvolume_cmd_group;
  88 extern const struct cmd_group filesystem_cmd_group;
  89 extern const struct cmd_group balance_cmd_group;
  90 extern const struct cmd_group device_cmd_group;
  91 extern const struct cmd_group scrub_cmd_group;
  92 extern const struct cmd_group inspect_cmd_group;
  93 extern const struct cmd_group property_cmd_group;
  94 extern const struct cmd_group quota_cmd_group;
  95 extern const struct cmd_group qgroup_cmd_group;
  96 extern const struct cmd_group replace_cmd_group;
  97 extern const struct cmd_group rescue_cmd_group;
  98
  99 extern const char * const cmd_send_usage[];
 100 extern const char * const cmd_receive_usage[];
 101 extern const char * const cmd_check_usage[];
 102 extern const char * const cmd_chunk_recover_usage[];
 103 extern const char * const cmd_super_recover_usage[];
 104 extern const char * const cmd_restore_usage[];
 105 extern const char * const cmd_rescue_usage[];
 106
 107 int cmd_subvolume(int argc, char **argv);
 108 int cmd_filesystem(int argc, char **argv);
 109 int cmd_balance(int argc, char **argv);
 110 int cmd_device(int argc, char **argv);
 111 int cmd_scrub(int argc, char **argv);
 112 int cmd_check(int argc, char **argv);
 113 int cmd_chunk_recover(int argc, char **argv);
 114 int cmd_super_recover(int argc, char **argv);
 115 int cmd_inspect(int argc, char **argv);
 116 int cmd_property(int argc, char **argv);
 117 int cmd_send(int argc, char **argv);
 118 int cmd_receive(int argc, char **argv);
 119 int cmd_quota(int argc, char **argv);
 120 int cmd_qgroup(int argc, char **argv);
 121 int cmd_replace(int argc, char **argv);
 122 int cmd_restore(int argc, char **argv);
 123 int cmd_select_super(int argc, char **argv);
 124 int cmd_dump_super(int argc, char **argv);
 125 int cmd_debug_tree(int argc, char **argv);
 126 int cmd_rescue(int argc, char **argv);
 127
 128 #endif