* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.

/* $NetBSD: lvmcmdline.c,v 1.2 2011/01/05 14:57:28 haad Exp $ */

/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

#include "tools.h"
#include "lvm2cmdline.h"
#include "label.h"
#include "lvm-version.h"

#include "stub.h"
#include "lvm2cmd.h"
#include "last-path-component.h"

#include <signal.h>
#include <syslog.h>
#include <libgen.h>
#include <sys/stat.h>
#include <time.h>
#include <sys/resource.h>

#ifdef HAVE_GETOPTLONG
# include <getopt.h>
# define GETOPTLONG_FN(a, b, c, d, e) getopt_long((a), (b), (c), (d), (e))
# define OPTIND_INIT 0
#else
struct option {
};
extern int optind;
extern char *optarg;
# define GETOPTLONG_FN(a, b, c, d, e) getopt((a), (b), (c))
# define OPTIND_INIT 1
#endif

/*
* Table of valid switches
*/
static struct arg _the_args[ARG_COUNT + 1] = {
#define arg(a, b, c, d, e) {b, "", "--" c, d, e, 0, NULL, 0, 0, INT64_C(0), UINT64_C(0), SIGN_NONE, PERCENT_NONE, NULL},
#include "args.h"
#undef arg
};

static struct cmdline_context _cmdline;

/* Command line args */
/* FIXME: Move static _the_args into cmd? */
unsigned arg_count(const struct cmd_context *cmd __attribute((unused)), int a)
{
return _the_args[a].count;
}

unsigned arg_is_set(const struct cmd_context *cmd, int a)
{
return arg_count(cmd, a) ? 1 : 0;
}

const char *arg_value(struct cmd_context *cmd __attribute((unused)), int a)
{
return _the_args[a].value;
}

const char *arg_str_value(struct cmd_context *cmd, int a, const char *def)
{
return arg_count(cmd, a) ? _the_args[a].value : def;
}

int32_t arg_int_value(struct cmd_context *cmd, int a, const int32_t def)
{
return arg_count(cmd, a) ? _the_args[a].i_value : def;
}

uint32_t arg_uint_value(struct cmd_context *cmd, int a, const uint32_t def)
{
return arg_count(cmd, a) ? _the_args[a].ui_value : def;
}

int64_t arg_int64_value(struct cmd_context *cmd, int a, const int64_t def)
{
return arg_count(cmd, a) ? _the_args[a].i64_value : def;
}

uint64_t arg_uint64_value(struct cmd_context *cmd, int a, const uint64_t def)
{
return arg_count(cmd, a) ? _the_args[a].ui64_value : def;
}

const void *arg_ptr_value(struct cmd_context *cmd, int a, const void *def)
{
return arg_count(cmd, a) ? _the_args[a].ptr : def;
}

sign_t arg_sign_value(struct cmd_context *cmd, int a, const sign_t def)
{
return arg_count(cmd, a) ? _the_args[a].sign : def;
}

percent_t arg_percent_value(struct cmd_context *cmd, int a, const percent_t def)
{
return arg_count(cmd, a) ? _the_args[a].percent : def;
}

int arg_count_increment(struct cmd_context *cmd __attribute((unused)), int a)
{
return _the_args[a].count++;
}

int yes_no_arg(struct cmd_context *cmd __attribute((unused)), struct arg *a)
{
a->sign = SIGN_NONE;
a->percent = PERCENT_NONE;

if (!strcmp(a->value, "y")) {
a->i_value = 1;
a->ui_value = 1;
}

else if (!strcmp(a->value, "n")) {
a->i_value = 0;
a->ui_value = 0;
}

else
return 0;

return 1;
}

int yes_no_excl_arg(struct cmd_context *cmd __attribute((unused)),
struct arg *a)
{
a->sign = SIGN_NONE;
a->percent = PERCENT_NONE;

if (!strcmp(a->value, "e") || !strcmp(a->value, "ey") ||
!strcmp(a->value, "ye")) {
a->i_value = CHANGE_AE;
a->ui_value = CHANGE_AE;
}

else if (!strcmp(a->value, "y")) {
a->i_value = CHANGE_AY;
a->ui_value = CHANGE_AY;
}

else if (!strcmp(a->value, "n") || !strcmp(a->value, "en") ||
!strcmp(a->value, "ne")) {
a->i_value = CHANGE_AN;
a->ui_value = CHANGE_AN;
}

else if (!strcmp(a->value, "ln") || !strcmp(a->value, "nl")) {
a->i_value = CHANGE_ALN;
a->ui_value = CHANGE_ALN;
}

else if (!strcmp(a->value, "ly") || !strcmp(a->value, "yl")) {
a->i_value = CHANGE_ALY;
a->ui_value = CHANGE_ALY;
}

else
return 0;

return 1;
}

int metadatatype_arg(struct cmd_context *cmd, struct arg *a)
{
struct format_type *fmt;
char *format;

format = a->value;

dm_list_iterate_items(fmt, &cmd->formats) {
if (!strcasecmp(fmt->name, format) ||
!strcasecmp(fmt->name + 3, format) ||
(fmt->alias && !strcasecmp(fmt->alias, format))) {
a->ptr = fmt;
return 1;
}
}

return 0;
}

static int _get_int_arg(struct arg *a, char **ptr)
{
char *val;
long v;

a->percent = PERCENT_NONE;

val = a->value;
switch (*val) {
case '+':
a->sign = SIGN_PLUS;
val++;
break;
case '-':
a->sign = SIGN_MINUS;
val++;
break;
default:
a->sign = SIGN_NONE;
}

if (!isdigit(*val))
return 0;

v = strtol(val, ptr, 10);

if (*ptr == val)
return 0;

a->i_value = (int32_t) v;
a->ui_value = (uint32_t) v;
a->i64_value = (int64_t) v;
a->ui64_value = (uint64_t) v;

return 1;
}

/* Size stored in sectors */
static int _size_arg(struct cmd_context *cmd __attribute((unused)), struct arg *a, int factor)
{
char *ptr;
int i;
static const char *suffixes = "kmgtpebs";
char *val;
double v;
uint64_t v_tmp, adjustment;

a->percent = PERCENT_NONE;

val = a->value;
switch (*val) {
case '+':
a->sign = SIGN_PLUS;
val++;
break;
case '-':
a->sign = SIGN_MINUS;
val++;
break;
default:
a->sign = SIGN_NONE;
}

if (!isdigit(*val))
return 0;

v = strtod(val, &ptr);

if (ptr == val)
return 0;

if (*ptr) {
for (i = strlen(suffixes) - 1; i >= 0; i--)
if (suffixes[i] == tolower((int) *ptr))
break;

if (i < 0) {
return 0;
} else if (i == 7) {
/* sectors */
v = v;
} else if (i == 6) {
/* bytes */
v_tmp = (uint64_t) v;
adjustment = v_tmp % 512;
if (adjustment) {
v_tmp += (512 - adjustment);
log_error("Size is not a multiple of 512. "
"Try using %"PRIu64" or %"PRIu64".",
v_tmp - 512, v_tmp);
return 0;
}
v /= 512;
} else {
/* all other units: kmgtpe */
while (i-- > 0)
v *= 1024;
v *= 2;
}
} else
v *= factor;

a->i_value = (int32_t) v;
a->ui_value = (uint32_t) v;
a->i64_value = (int64_t) v;
a->ui64_value = (uint64_t) v;

return 1;
}

int size_kb_arg(struct cmd_context *cmd, struct arg *a)
{
return _size_arg(cmd, a, 2);
}

int size_mb_arg(struct cmd_context *cmd, struct arg *a)
{
return _size_arg(cmd, a, 2048);
}

int int_arg(struct cmd_context *cmd __attribute((unused)), struct arg *a)
{
char *ptr;

if (!_get_int_arg(a, &ptr) || (*ptr) || (a->sign == SIGN_MINUS))
return 0;

return 1;
}

int int_arg_with_sign(struct cmd_context *cmd __attribute((unused)), struct arg *a)
{
char *ptr;

if (!_get_int_arg(a, &ptr) || (*ptr))
return 0;

return 1;
}

int int_arg_with_sign_and_percent(struct cmd_context *cmd __attribute((unused)),
struct arg *a)
{
char *ptr;

if (!_get_int_arg(a, &ptr))
return 0;

if (!*ptr)
return 1;

if (*ptr++ != '%')
return 0;

if (!strcasecmp(ptr, "V") || !strcasecmp(ptr, "VG"))
a->percent = PERCENT_VG;
else if (!strcasecmp(ptr, "L") || !strcasecmp(ptr, "LV"))
a->percent = PERCENT_LV;
else if (!strcasecmp(ptr, "P") || !strcasecmp(ptr, "PV") ||
!strcasecmp(ptr, "PVS"))
a->percent = PERCENT_PVS;
else if (!strcasecmp(ptr, "F") || !strcasecmp(ptr, "FR") ||
!strcasecmp(ptr, "FREE"))
a->percent = PERCENT_FREE;
else
return 0;

return 1;
}

int minor_arg(struct cmd_context *cmd __attribute((unused)), struct arg *a)
{
char *ptr;

if (!_get_int_arg(a, &ptr) || (*ptr) || (a->sign == SIGN_MINUS))
return 0;

if (a->i_value > 255) {
log_error("Minor number outside range 0-255");
return 0;
}

return 1;
}

int major_arg(struct cmd_context *cmd __attribute((unused)), struct arg *a)
{
char *ptr;

if (!_get_int_arg(a, &ptr) || (*ptr) || (a->sign == SIGN_MINUS))
return 0;

if (a->i_value > 255) {
log_error("Major number outside range 0-255");
return 0;
}

/* FIXME Also Check against /proc/devices */

return 1;
}

int string_arg(struct cmd_context *cmd __attribute((unused)),
struct arg *a __attribute((unused)))
{
return 1;
}

int tag_arg(struct cmd_context *cmd __attribute((unused)), struct arg *a)
{
char *pos = a->value;

if (*pos == '@')
pos++;

if (!validate_name(pos))
return 0;

a->value = pos;

return 1;
}

int permission_arg(struct cmd_context *cmd __attribute((unused)), struct arg *a)
{
a->sign = SIGN_NONE;

if ((!strcmp(a->value, "rw")) || (!strcmp(a->value, "wr")))
a->ui_value = LVM_READ | LVM_WRITE;

else if (!strcmp(a->value, "r"))
a->ui_value = LVM_READ;

else
return 0;

return 1;
}

int alloc_arg(struct cmd_context *cmd __attribute((unused)), struct arg *a)
{
alloc_policy_t alloc;

a->sign = SIGN_NONE;

alloc = get_alloc_from_string(a->value);
if (alloc == ALLOC_INVALID)
return 0;

a->ui_value = (uint32_t) alloc;

return 1;
}

int segtype_arg(struct cmd_context *cmd, struct arg *a)
{
if (!(a->ptr = (void *) get_segtype_from_string(cmd, a->value)))
return 0;

return 1;
}

/*
* Positive integer, zero or "auto".
*/
int readahead_arg(struct cmd_context *cmd __attribute((unused)), struct arg *a)
{
if (!strcasecmp(a->value, "auto")) {
a->ui_value = DM_READ_AHEAD_AUTO;
return 1;
}

if (!strcasecmp(a->value, "none")) {
a->ui_value = DM_READ_AHEAD_NONE;
return 1;
}

if (!_size_arg(cmd, a, 1))
return 0;

if (a->sign == SIGN_MINUS)
return 0;

return 1;
}

static void __alloc(int size)
{
if (!(_cmdline.commands = dm_realloc(_cmdline.commands, sizeof(*_cmdline.commands) * size))) {
log_fatal("Couldn't allocate memory.");
exit(ECMD_FAILED);
}

_cmdline.commands_size = size;
}

static void _alloc_command(void)
{
if (!_cmdline.commands_size)
__alloc(32);

if (_cmdline.commands_size <= _cmdline.num_commands)
__alloc(2 * _cmdline.commands_size);
}

static void _create_new_command(const char *name, command_fn command,
unsigned flags,
const char *desc, const char *usagestr,
int nargs, int *args)
{
struct command *nc;

_alloc_command();

nc = _cmdline.commands + _cmdline.num_commands++;

nc->name = name;
nc->desc = desc;
nc->usage = usagestr;
nc->fn = command;
nc->flags = flags;
nc->num_args = nargs;
nc->valid_args = args;
}

static void _register_command(const char *name, command_fn fn, const char *desc,
unsigned flags, const char *usagestr, ...)
{
int nargs = 0, i;
int *args;
va_list ap;

/* count how many arguments we have */
va_start(ap, usagestr);
while (va_arg(ap, int) >= 0)
nargs++;
va_end(ap);

/* allocate space for them */
if (!(args = dm_malloc(sizeof(*args) * nargs))) {
log_fatal("Out of memory.");
exit(ECMD_FAILED);
}

/* fill them in */
va_start(ap, usagestr);
for (i = 0; i < nargs; i++)
args[i] = va_arg(ap, int);
va_end(ap);

/* enter the command in the register */
_create_new_command(name, fn, flags, desc, usagestr, nargs, args);
}

void lvm_register_commands(void)
{
#define xx(a, b, c, d...) _register_command(# a, a, b, c, ## d, \
driverloaded_ARG, \
debug_ARG, help_ARG, help2_ARG, \
version_ARG, verbose_ARG, \
quiet_ARG, config_ARG, -1);
#include "commands.h"
#undef xx
}

static struct command *_find_command(const char *name)
{
int i;
const char *base;

base = last_path_component(name);

for (i = 0; i < _cmdline.num_commands; i++) {
if (!strcmp(base, _cmdline.commands[i].name))
break;
}

if (i >= _cmdline.num_commands)
return 0;

return _cmdline.commands + i;
}

static void _short_usage(const char *name)
{
log_error("Run `%s --help' for more information.", name);
}

static int _usage(const char *name)
{
struct command *com = _find_command(name);

if (!com) {
log_print("%s: no such command.", name);
return 0;
}

log_print("%s: %s\n\n%s", com->name, com->desc, com->usage);
return 1;
}

/*
* Sets up the short and long argument. If there
* is no short argument then the index of the
* argument in the the_args array is set as the
* long opt value. Yuck. Of course this means we
* can't have more than 'a' long arguments.
*/
static void _add_getopt_arg(int arg, char **ptr, struct option **o)
{
struct arg *a = _cmdline.the_args + arg;

if (a->short_arg) {
*(*ptr)++ = a->short_arg;

if (a->fn)
*(*ptr)++ = ':';
}
#ifdef HAVE_GETOPTLONG
if (*(a->long_arg + 2)) {
(*o)->name = a->long_arg + 2;
(*o)->has_arg = a->fn ? 1 : 0;
(*o)->flag = NULL;
if (a->short_arg)
(*o)->val = a->short_arg;
else
(*o)->val = arg;
(*o)++;
}
#endif
}

static struct arg *_find_arg(struct command *com, int opt)
{
struct arg *a;
int i, arg;

for (i = 0; i < com->num_args; i++) {
arg = com->valid_args[i];
a = _cmdline.the_args + arg;

/*
* opt should equal either the
* short arg, or the index into
* the_args.
*/
if ((a->short_arg && (opt == a->short_arg)) ||
(!a->short_arg && (opt == arg)))
return a;
}

return 0;
}

static int _process_command_line(struct cmd_context *cmd, int *argc,
char ***argv)
{
int i, opt;
char str[((ARG_COUNT + 1) * 2) + 1], *ptr = str;
struct option opts[ARG_COUNT + 1], *o = opts;
struct arg *a;

for (i = 0; i < ARG_COUNT; i++) {
a = _cmdline.the_args + i;

/* zero the count and arg */
a->count = 0;
a->value = 0;
a->i_value = 0;
a->ui_value = 0;
a->i64_value = 0;
a->ui64_value = 0;
}

/* fill in the short and long opts */
for (i = 0; i < cmd->command->num_args; i++)
_add_getopt_arg(cmd->command->valid_args[i], &ptr, &o);

*ptr = '\0';
memset(o, 0, sizeof(*o));

/* initialise getopt_long & scan for command line switches */
optarg = 0;
optind = OPTIND_INIT;
while ((opt = GETOPTLONG_FN(*argc, *argv, str, opts, NULL)) >= 0) {

if (opt == '?')
return 0;

a = _find_arg(cmd->command, opt);

if (!a) {
log_fatal("Unrecognised option.");
return 0;
}

if (a->count && !(a->flags & ARG_REPEATABLE)) {
log_error("Option%s%c%s%s may not be repeated",
a->short_arg ? " -" : "",
a->short_arg ? : ' ',
(a->short_arg && a->long_arg) ?
"/" : "", a->long_arg ? : "");
return 0;
}

if (a->fn) {
if (!optarg) {
log_error("Option requires argument.");
return 0;
}

a->value = optarg;

if (!a->fn(cmd, a)) {
log_error("Invalid argument %s", optarg);
return 0;
}
}

a->count++;
}

*argc -= optind;
*argv += optind;
return 1;
}

static int _merge_synonym(struct cmd_context *cmd, int oldarg, int newarg)
{
const struct arg *old;
struct arg *new;

if (arg_count(cmd, oldarg) && arg_count(cmd, newarg)) {
log_error("%s and %s are synonyms. Please only supply one.",
_cmdline.the_args[oldarg].long_arg, _cmdline.the_args[newarg].long_arg);
return 0;
}

if (!arg_count(cmd, oldarg))
return 1;

old = _cmdline.the_args + oldarg;
new = _cmdline.the_args + newarg;

new->count = old->count;
new->value = old->value;
new->i_value = old->i_value;
new->ui_value = old->ui_value;
new->i64_value = old->i64_value;
new->ui64_value = old->ui64_value;
new->sign = old->sign;

return 1;
}

int version(struct cmd_context *cmd __attribute((unused)),
int argc __attribute((unused)),
char **argv __attribute((unused)))
{
char vsn[80];

log_print("LVM version: %s", LVM_VERSION);
if (library_version(vsn, sizeof(vsn)))
log_print("Library version: %s", vsn);
if (driver_version(vsn, sizeof(vsn)))
log_print("Driver version: %s", vsn);

return ECMD_PROCESSED;
}

static int _get_settings(struct cmd_context *cmd)
{
cmd->current_settings = cmd->default_settings;

if (arg_count(cmd, debug_ARG))
cmd->current_settings.debug = _LOG_FATAL +
(arg_count(cmd, debug_ARG) - 1);

if (arg_count(cmd, verbose_ARG))
cmd->current_settings.verbose = arg_count(cmd, verbose_ARG);

if (arg_count(cmd, quiet_ARG)) {
cmd->current_settings.debug = 0;
cmd->current_settings.verbose = 0;
}

if (arg_count(cmd, test_ARG))
cmd->current_settings.test = arg_count(cmd, test_ARG);

if (arg_count(cmd, driverloaded_ARG)) {
cmd->current_settings.activation =
arg_int_value(cmd, driverloaded_ARG,
cmd->default_settings.activation);
}

cmd->current_settings.archive = arg_int_value(cmd, autobackup_ARG, cmd->current_settings.archive);
cmd->current_settings.backup = arg_int_value(cmd, autobackup_ARG, cmd->current_settings.backup);
cmd->current_settings.cache_vgmetadata = cmd->command->flags & CACHE_VGMETADATA ? 1 : 0;
cmd->partial_activation = 0;

if (arg_count(cmd, partial_ARG)) {
cmd->partial_activation = 1;
log_print("Partial mode. Incomplete volume groups will "
"be activated read-only.");
}

if (arg_count(cmd, ignorelockingfailure_ARG))
init_ignorelockingfailure(1);
else
init_ignorelockingfailure(0);

if (arg_count(cmd, nosuffix_ARG))
cmd->current_settings.suffix = 0;

if (arg_count(cmd, units_ARG))
if (!(cmd->current_settings.unit_factor =
units_to_bytes(arg_str_value(cmd, units_ARG, ""),
&cmd->current_settings.unit_type))) {
log_error("Invalid units specification");
return EINVALID_CMD_LINE;
}

if (arg_count(cmd, trustcache_ARG)) {
if (arg_count(cmd, all_ARG)) {
log_error("--trustcache is incompatible with --all");
return EINVALID_CMD_LINE;
}
init_trust_cache(1);
log_warn("WARNING: Cache file of PVs will be trusted. "
"New devices holding PVs may get ignored.");
} else
init_trust_cache(0);

if (arg_count(cmd, noudevsync_ARG))
cmd->current_settings.udev_sync = 0;

/* Handle synonyms */
if (!_merge_synonym(cmd, resizable_ARG, resizeable_ARG) ||
!_merge_synonym(cmd, allocation_ARG, allocatable_ARG) ||
!_merge_synonym(cmd, allocation_ARG, resizeable_ARG) ||
!_merge_synonym(cmd, virtualoriginsize_ARG, virtualsize_ARG) ||
!_merge_synonym(cmd, metadatacopies_ARG, pvmetadatacopies_ARG))
return EINVALID_CMD_LINE;

/* Zero indicates success */
return 0;
}

static int _process_common_commands(struct cmd_context *cmd)
{
if (arg_count(cmd, help_ARG) || arg_count(cmd, help2_ARG)) {
_usage(cmd->command->name);
return ECMD_PROCESSED;
}

if (arg_count(cmd, version_ARG)) {
return version(cmd, 0, (char **) NULL);
}

/* Zero indicates it's OK to continue processing this command */
return 0;
}

static void _display_help(void)
{
int i;

log_error("Available lvm commands:");
log_error("Use 'lvm help <command>' for more information");
log_error(" ");

for (i = 0; i < _cmdline.num_commands; i++) {
struct command *com = _cmdline.commands + i;

log_error("%-16.16s%s", com->name, com->desc);
}
}

int help(struct cmd_context *cmd __attribute((unused)), int argc, char **argv)
{
int ret = ECMD_PROCESSED;

if (!argc)
_display_help();
else {
int i;
for (i = 0; i < argc; i++)
if (!_usage(argv[i]))
ret = EINVALID_CMD_LINE;
}

return ret;
}

static void _apply_settings(struct cmd_context *cmd)
{
init_debug(cmd->current_settings.debug);
init_verbose(cmd->current_settings.verbose + VERBOSE_BASE_LEVEL);
init_test(cmd->current_settings.test);
init_full_scan_done(0);
init_mirror_in_sync(0);

init_msg_prefix(cmd->default_settings.msg_prefix);
init_cmd_name(cmd->default_settings.cmd_name);

archive_enable(cmd, cmd->current_settings.archive);
backup_enable(cmd, cmd->current_settings.backup);

set_activation(cmd->current_settings.activation);

cmd->fmt = arg_ptr_value(cmd, metadatatype_ARG,
cmd->current_settings.fmt);
cmd->handles_missing_pvs = 0;
}

static const char *_copy_command_line(struct cmd_context *cmd, int argc, char **argv)
{
int i, space;

/*
* Build up the complete command line, used as a
* description for backups.
*/
if (!dm_pool_begin_object(cmd->mem, 128))
goto_bad;

for (i = 0; i < argc; i++) {
space = strchr(argv[i], ' ') ? 1 : 0;

if (space && !dm_pool_grow_object(cmd->mem, "'", 1))
goto_bad;

if (!dm_pool_grow_object(cmd->mem, argv[i], strlen(argv[i])))
goto_bad;

if (space && !dm_pool_grow_object(cmd->mem, "'", 1))
goto_bad;

if (i < (argc - 1))
if (!dm_pool_grow_object(cmd->mem, " ", 1))
goto_bad;
}

/*
* Terminate.
*/
if (!dm_pool_grow_object(cmd->mem, "\0", 1))
goto_bad;

return dm_pool_end_object(cmd->mem);

bad:
log_error("Couldn't copy command line.");
dm_pool_abandon_object(cmd->mem);
return NULL;
}

int lvm_run_command(struct cmd_context *cmd, int argc, char **argv)
{
int ret = 0;
int locking_type;

init_error_message_produced(0);

/* each command should start out with sigint flag cleared */
sigint_clear();

if (!(cmd->cmd_line = _copy_command_line(cmd, argc, argv))) {
stack;
return ECMD_FAILED;
}

log_debug("Parsing: %s", cmd->cmd_line);

if (!(cmd->command = _find_command(argv[0])))
return ENO_SUCH_CMD;

if (!_process_command_line(cmd, &argc, &argv)) {
log_error("Error during parsing of command line.");
return EINVALID_CMD_LINE;
}

set_cmd_name(cmd->command->name);

if (arg_count(cmd, config_ARG))
if ((ret = override_config_tree_from_string(cmd,
arg_str_value(cmd, config_ARG, "")))) {
ret = EINVALID_CMD_LINE;
goto_out;
}

if (arg_count(cmd, config_ARG) || !cmd->config_valid || config_files_changed(cmd)) {
/* Reinitialise various settings inc. logging, filters */
if (!refresh_toolcontext(cmd)) {
log_error("Updated config file invalid. Aborting.");
return ECMD_FAILED;
}
}

if ((ret = _get_settings(cmd)))
goto_out;
_apply_settings(cmd);

log_debug("Processing: %s", cmd->cmd_line);

#ifdef O_DIRECT_SUPPORT
log_debug("O_DIRECT will be used");
#endif

if ((ret = _process_common_commands(cmd)))
goto_out;

if (arg_count(cmd, nolocking_ARG))
locking_type = 0;
else
locking_type = -1;

if (!init_locking(locking_type, cmd)) {
log_error("Locking type %d initialisation failed.",
locking_type);
ret = ECMD_FAILED;
goto out;
}

ret = cmd->command->fn(cmd, argc, argv);

fin_locking();

out:
if (test_mode()) {
log_verbose("Test mode: Wiping internal cache");
lvmcache_destroy(cmd, 1);
}

if (cmd->cft_override) {
destroy_config_tree(cmd->cft_override);
cmd->cft_override = NULL;
/* Move this? */
if (!refresh_toolcontext(cmd))
stack;
}

/* FIXME Move this? */
cmd->current_settings = cmd->default_settings;
_apply_settings(cmd);

if (ret == EINVALID_CMD_LINE && !_cmdline.interactive)
_short_usage(cmd->command->name);

log_debug("Completed: %s", cmd->cmd_line);

/*
* free off any memory the command used.
*/
dm_pool_empty(cmd->mem);

reset_lvm_errno(1);

return ret;
}

int lvm_split(char *str, int *argc, char **argv, int max)
{
char *b = str, *e;
*argc = 0;

while (*b) {
while (*b && isspace(*b))
b++;

if ((!*b) || (*b == '#'))
break;

e = b;
while (*e && !isspace(*e))
e++;

argv[(*argc)++] = b;
if (!*e)
break;
*e++ = '\0';
b = e;
if (*argc == max)
break;
}

return *argc;
}

static const char *_get_cmdline(pid_t pid)
{
static char _proc_cmdline[32];
char buf[256];
int fd;

snprintf(buf, sizeof(buf), DEFAULT_PROC_DIR "/%u/cmdline", pid);
if ((fd = open(buf, O_RDONLY)) > 0) {
read(fd, _proc_cmdline, sizeof(_proc_cmdline) - 1);
_proc_cmdline[sizeof(_proc_cmdline) - 1] = '\0';
close(fd);
} else
_proc_cmdline[0] = '\0';

return _proc_cmdline;
}

static const char *_get_filename(int fd)
{
static char filename[PATH_MAX];
char buf[32]; /* Assumes short DEFAULT_PROC_DIR */
int size;

snprintf(buf, sizeof(buf), DEFAULT_PROC_DIR "/self/fd/%u", fd);

if ((size = readlink(buf, filename, sizeof(filename) - 1)) == -1)
filename[0] = '\0';
else
filename[size] = '\0';

return filename;
}

static void _close_descriptor(int fd, unsigned suppress_warnings,
const char *command, pid_t ppid,
const char *parent_cmdline)
{
int r;
const char *filename;

/* Ignore bad file descriptors */
if (fcntl(fd, F_GETFD) == -1 && errno == EBADF)
return;

if (!suppress_warnings)
filename = _get_filename(fd);

r = close(fd);
if (suppress_warnings)
return;

if (!r)
fprintf(stderr, "File descriptor %d (%s) leaked on "
"%s invocation.", fd, filename, command);
else if (errno == EBADF)
return;
else
fprintf(stderr, "Close failed on stray file descriptor "
"%d (%s): %s", fd, filename, strerror(errno));

fprintf(stderr, " Parent PID %" PRIpid_t ": %s\n", ppid, parent_cmdline);
}

static void _close_stray_fds(const char *command)
{
struct rlimit rlim;
int fd;
unsigned suppress_warnings = 0;
pid_t ppid = getppid();
const char *parent_cmdline = _get_cmdline(ppid);

if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) {
fprintf(stderr, "getrlimit(RLIMIT_NOFILE) failed: %s\n",
strerror(errno));
return;
}

if (getenv("LVM_SUPPRESS_FD_WARNINGS"))
suppress_warnings = 1;

for (fd = 3; fd < rlim.rlim_cur; fd++)
_close_descriptor(fd, suppress_warnings, command, ppid,
parent_cmdline);
}

struct cmd_context *init_lvm(void)
{
struct cmd_context *cmd;

_cmdline.the_args = &_the_args[0];

if (!(cmd = create_toolcontext(0, NULL)))
return_NULL;

if (stored_errno()) {
destroy_toolcontext(cmd);
return_NULL;
}

return cmd;
}

static void _fin_commands(void)
{
int i;

for (i = 0; i < _cmdline.num_commands; i++)
dm_free(_cmdline.commands[i].valid_args);

dm_free(_cmdline.commands);
}

void lvm_fin(struct cmd_context *cmd)
{
_fin_commands();
destroy_toolcontext(cmd);
}

static int _run_script(struct cmd_context *cmd, int argc, char **argv)
{
FILE *script;

char buffer[CMD_LEN];
int ret = 0;
int magic_number = 0;
char *script_file = argv[0];

if ((script = fopen(script_file, "r")) == NULL)
return ENO_SUCH_CMD;

while (fgets(buffer, sizeof(buffer), script) != NULL) {
if (!magic_number) {
if (buffer[0] == '#' && buffer[1] == '!')
magic_number = 1;
else {
ret = ENO_SUCH_CMD;
break;
}
}
if ((strlen(buffer) == sizeof(buffer) - 1)
&& (buffer[sizeof(buffer) - 1] - 2 != '\n')) {
buffer[50] = '\0';
log_error("Line too long (max 255) beginning: %s",
buffer);
ret = EINVALID_CMD_LINE;
break;
}
if (lvm_split(buffer, &argc, argv, MAX_ARGS) == MAX_ARGS) {
buffer[50] = '\0';
log_error("Too many arguments: %s", buffer);
ret = EINVALID_CMD_LINE;
break;
}
if (!argc)
continue;
if (!strcmp(argv[0], "quit") || !strcmp(argv[0], "exit"))
break;
ret = lvm_run_command(cmd, argc, argv);
if (ret != ECMD_PROCESSED) {
if (!error_message_produced()) {
log_debug("Internal error: Failed command did not use log_error");
log_error("Command failed with status code %d.", ret);
}
break;
}
}

if (fclose(script))
log_sys_error("fclose", script_file);

return ret;
}

/*
* Determine whether we should fall back and exec the equivalent LVM1 tool
*/
static int _lvm1_fallback(struct cmd_context *cmd)
{
char vsn[80];
int dm_present;

if (!find_config_tree_int(cmd, "global/fallback_to_lvm1",
DEFAULT_FALLBACK_TO_LVM1) ||
strncmp(cmd->kernel_vsn, "2.4.", 4))
return 0;

log_suppress(1);
dm_present = driver_version(vsn, sizeof(vsn));
log_suppress(0);

if (dm_present || !lvm1_present(cmd))
return 0;

return 1;
}

static void _exec_lvm1_command(char **argv)
{
char path[PATH_MAX];

if (dm_snprintf(path, sizeof(path), "%s.lvm1", argv[0]) < 0) {
log_error("Failed to create LVM1 tool pathname");
return;
}

execvp(path, argv);
log_sys_error("execvp", path);
}

static void _nonroot_warning(void)
{
#ifdef __NetBSD__
gid_t groups_list[NGROUPS_MAX];
int i, group_num, is_operator = 0;

/* Operator group in NetBSD should be able to see lvm status. */
if (getuid() || geteuid()) {
group_num = getgroups(NGROUPS_MAX, groups_list);

for (i = 0; i < group_num; i++) {
if (groups_list[i] == DM_DEVICE_GID) {
is_operator = 1;
init_operator(is_operator);
break;
}
}

if (is_operator)
log_warn("WARNING: Using LVM as operator you have only read access.");
else
log_warn("WARNING: Running as a non-root user and without "
"operator group. Functionality may be unavailable.");
}
#else
if (getuid() || geteuid())
log_warn("WARNING: Running as a non-root user. Functionality may be unavailable.");
#endif
}

int lvm2_main(int argc, char **argv)
{
const char *base;
int ret, alias = 0;
struct cmd_context *cmd;

base = last_path_component(argv[0]);
if (strcmp(base, "lvm") && strcmp(base, "lvm.static") &&
strcmp(base, "initrd-lvm"))
alias = 1;

_close_stray_fds(base);

if (is_static() && strcmp(base, "lvm.static") &&
path_exists(LVM_SHARED_PATH) &&
!getenv("LVM_DID_EXEC")) {
setenv("LVM_DID_EXEC", base, 1);
execvp(LVM_SHARED_PATH, argv);
unsetenv("LVM_DID_EXEC");
}

if (!(cmd = init_lvm()))
return -1;

cmd->argv = argv;
lvm_register_commands();

if (_lvm1_fallback(cmd)) {
/* Attempt to run equivalent LVM1 tool instead */
if (!alias) {
argv++;
argc--;
alias = 0;
}
if (!argc) {
log_error("Falling back to LVM1 tools, but no "
"command specified.");
return ECMD_FAILED;
}
_exec_lvm1_command(argv);
return ECMD_FAILED;
}
#ifdef READLINE_SUPPORT
if (!alias && argc == 1) {
_nonroot_warning();
ret = lvm_shell(cmd, &_cmdline);
goto out;
}
#endif

if (!alias) {
if (argc < 2) {
log_fatal("Please supply an LVM command.");
_display_help();
ret = EINVALID_CMD_LINE;
goto out;
}

argc--;
argv++;
}

_nonroot_warning();
ret = lvm_run_command(cmd, argc, argv);
if ((ret == ENO_SUCH_CMD) && (!alias))
ret = _run_script(cmd, argc, argv);
if (ret == ENO_SUCH_CMD)
log_error("No such command. Try 'help'.");

if ((ret != ECMD_PROCESSED) && !error_message_produced()) {
log_debug("Internal error: Failed command did not use log_error");
log_error("Command failed with status code %d.", ret);
}

out:
lvm_fin(cmd);
if (ret == ECMD_PROCESSED)
ret = 0;
return ret;
}