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lvm2/tools/dmsetup.c

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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004 Red Hat, Inc. All rights reserved.
*
* This file is part of the device-mapper userspace tools.
*
* 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 General Public License v.2.
*
* You should have received a copy of the GNU 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
*/
#define _GNU_SOURCE
#define _FILE_OFFSET_BITS 64
#include "libdevmapper.h"
#include "log.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <unistd.h>
#include <libgen.h>
#include <sys/wait.h>
#include <unistd.h>
#include <sys/param.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
#ifndef TEMP_FAILURE_RETRY
# define TEMP_FAILURE_RETRY(expression) \
(__extension__ \
({ long int __result; \
do __result = (long int) (expression); \
while (__result == -1L && errno == EINTR); \
__result; }))
#endif
#ifdef linux
# include "kdev_t.h"
#else
# define MAJOR(x) major((x))
# define MINOR(x) minor((x))
# define MKDEV(x,y) makedev((x),(y))
#endif
#define LINE_SIZE 1024
#define ARGS_MAX 256
#define err(msg, x...) fprintf(stderr, msg "\n", ##x)
/*
* We have only very simple switches ATM.
*/
enum {
READ_ONLY = 0,
COLS_ARG,
EXEC_ARG,
MAJOR_ARG,
MINOR_ARG,
NOHEADINGS_ARG,
NOOPENCOUNT_ARG,
NOTABLE_ARG,
OPTIONS_ARG,
TARGET_ARG,
UUID_ARG,
VERBOSE_ARG,
VERSION_ARG,
NUM_SWITCHES
};
static int _switches[NUM_SWITCHES];
static int _values[NUM_SWITCHES];
static char *_uuid;
static char *_fields;
static char *_target;
static char *_command;
/*
* Commands
*/
static int _parse_file(struct dm_task *dmt, const char *file)
{
char buffer[LINE_SIZE], ttype[LINE_SIZE], *ptr, *comment;
FILE *fp;
unsigned long long start, size;
int r = 0, n, line = 0;
/* OK for empty stdin */
if (file) {
if (!(fp = fopen(file, "r"))) {
err("Couldn't open '%s' for reading", file);
return 0;
}
} else
fp = stdin;
while (fgets(buffer, sizeof(buffer), fp)) {
line++;
/* trim trailing space */
for (ptr = buffer + strlen(buffer) - 1; ptr >= buffer; ptr--)
if (!isspace((int) *ptr))
break;
ptr++;
*ptr = '\0';
/* trim leading space */
for (ptr = buffer; *ptr && isspace((int) *ptr); ptr++) ;
if (!*ptr || *ptr == '#')
continue;
if (sscanf(ptr, "%llu %llu %s %n",
&start, &size, ttype, &n) < 3) {
err("%s:%d Invalid format", file, line);
goto out;
}
ptr += n;
if ((comment = strchr(ptr, (int) '#')))
*comment = '\0';
if (!dm_task_add_target(dmt, start, size, ttype, ptr))
goto out;
}
r = 1;
out:
if (file)
fclose(fp);
return r;
}
static void _display_info_cols_noheadings(struct dm_task *dmt,
struct dm_info *info)
{
const char *uuid;
if (!info->exists)
return;
uuid = dm_task_get_uuid(dmt);
if (_switches[OPTIONS_ARG])
printf("%s\n", dm_task_get_name(dmt));
else
printf("%s:%d:%d:%s%s%s%s:%d:%d:%" PRIu32 ":%s\n",
dm_task_get_name(dmt),
info->major, info->minor,
info->live_table ? "L" : "-",
info->inactive_table ? "I" : "-",
info->suspended ? "s" : "-",
info->read_only ? "r" : "w",
info->open_count, info->target_count, info->event_nr,
uuid && *uuid ? uuid : "");
}
static void _display_info_cols(struct dm_task *dmt, struct dm_info *info)
{
static int _headings = 0;
const char *uuid;
if (!info->exists) {
printf("Device does not exist.\n");
return;
}
if (!_headings) {
if (_switches[OPTIONS_ARG])
printf("Name\n");
else
printf("Name Maj Min Stat Open Targ "
"Event UUID\n");
_headings = 1;
}
if (_switches[OPTIONS_ARG])
printf("%s\n", dm_task_get_name(dmt));
else {
printf("%-16s %3d %3d %s%s%s%s %4d %4d %6" PRIu32 " ",
dm_task_get_name(dmt),
info->major, info->minor,
info->live_table ? "L" : "-",
info->inactive_table ? "I" : "-",
info->suspended ? "s" : "-",
info->read_only ? "r" : "w",
info->open_count, info->target_count, info->event_nr);
if ((uuid = dm_task_get_uuid(dmt)) && *uuid)
printf("%s", uuid);
printf("\n");
}
}
static void _display_info_long(struct dm_task *dmt, struct dm_info *info)
{
const char *uuid;
if (!info->exists) {
printf("Device does not exist.\n");
return;
}
printf("Name: %s\n", dm_task_get_name(dmt));
printf("State: %s%s\n",
info->suspended ? "SUSPENDED" : "ACTIVE",
info->read_only ? " (READ-ONLY)" : "");
if (!info->live_table && !info->inactive_table)
printf("Tables present: None\n");
else
printf("Tables present: %s%s%s\n",
info->live_table ? "LIVE" : "",
info->live_table && info->inactive_table ? " & " : "",
info->inactive_table ? "INACTIVE" : "");
if (info->open_count != -1)
printf("Open count: %d\n", info->open_count);
printf("Event number: %" PRIu32 "\n", info->event_nr);
printf("Major, minor: %d, %d\n", info->major, info->minor);
if (info->target_count != -1)
printf("Number of targets: %d\n", info->target_count);
if ((uuid = dm_task_get_uuid(dmt)) && *uuid)
printf("UUID: %s\n", uuid);
printf("\n");
}
static int _display_info(struct dm_task *dmt)
{
struct dm_info info;
if (!dm_task_get_info(dmt, &info))
return 0;
if (!_switches[COLS_ARG])
_display_info_long(dmt, &info);
else if (_switches[NOHEADINGS_ARG])
_display_info_cols_noheadings(dmt, &info);
else
_display_info_cols(dmt, &info);
return info.exists ? 1 : 0;
}
static int _set_task_device(struct dm_task *dmt, const char *name, int optional)
{
if (name) {
if (!dm_task_set_name(dmt, name))
return 0;
} else if (_switches[UUID_ARG]) {
if (!dm_task_set_uuid(dmt, _uuid))
return 0;
} else if (_switches[MAJOR_ARG] && _switches[MINOR_ARG]) {
if (!dm_task_set_major(dmt, _values[MAJOR_ARG]) ||
!dm_task_set_minor(dmt, _values[MINOR_ARG]))
return 0;
} else if (!optional) {
fprintf(stderr, "No device specified.\n");
return 0;
}
return 1;
}
static int _load(int argc, char **argv, void *data)
{
int r = 0;
struct dm_task *dmt;
const char *file = NULL;
const char *name = NULL;
if (_switches[NOTABLE_ARG]) {
err("--notable only available when creating new device\n");
return 0;
}
if (!_switches[UUID_ARG] && !_switches[MAJOR_ARG]) {
if (argc == 1) {
err("Please specify device.\n");
return 0;
}
name = argv[1];
argc--;
argv++;
} else if (argc > 2) {
err("Too many command line arguments.\n");
return 0;
}
if (argc == 2)
file = argv[1];
if (!(dmt = dm_task_create(DM_DEVICE_RELOAD)))
return 0;
if (!_set_task_device(dmt, name, 0))
goto out;
if (!_switches[NOTABLE_ARG] && !_parse_file(dmt, file))
goto out;
if (_switches[READ_ONLY] && !dm_task_set_ro(dmt))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
r = 1;
if (_switches[VERBOSE_ARG])
r = _display_info(dmt);
out:
dm_task_destroy(dmt);
return r;
}
static int _create(int argc, char **argv, void *data)
{
int r = 0;
struct dm_task *dmt;
const char *file = NULL;
if (argc == 3)
file = argv[2];
if (!(dmt = dm_task_create(DM_DEVICE_CREATE)))
return 0;
if (!dm_task_set_name(dmt, argv[1]))
goto out;
if (_switches[UUID_ARG] && !dm_task_set_uuid(dmt, _uuid))
goto out;
if (!_switches[NOTABLE_ARG] && !_parse_file(dmt, file))
goto out;
if (_switches[READ_ONLY] && !dm_task_set_ro(dmt))
goto out;
if (_switches[MAJOR_ARG] && !dm_task_set_major(dmt, _values[MAJOR_ARG]))
goto out;
if (_switches[MINOR_ARG] && !dm_task_set_minor(dmt, _values[MINOR_ARG]))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
r = 1;
if (_switches[VERBOSE_ARG])
r = _display_info(dmt);
out:
dm_task_destroy(dmt);
return r;
}
static int _rename(int argc, char **argv, void *data)
{
int r = 0;
struct dm_task *dmt;
if (!(dmt = dm_task_create(DM_DEVICE_RENAME)))
return 0;
/* FIXME Kernel doesn't support uuid or device number here yet */
if (!_set_task_device(dmt, (argc == 3) ? argv[1] : NULL, 0))
goto out;
if (!dm_task_set_newname(dmt, argv[argc - 1]))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
static int _message(int argc, char **argv, void *data)
{
int r = 0, sz = 1, i;
struct dm_task *dmt;
char *str;
if (!(dmt = dm_task_create(DM_DEVICE_TARGET_MSG)))
return 0;
if (_switches[UUID_ARG] || _switches[MAJOR_ARG]) {
if (!_set_task_device(dmt, NULL, 0))
goto out;
} else {
if (!_set_task_device(dmt, argv[1], 0))
goto out;
argc--;
argv++;
}
if (!dm_task_set_sector(dmt, atoll(argv[1])))
goto out;
argc -= 2;
argv += 2;
if (argc <= 0)
err("No message supplied.\n");
for (i = 0; i < argc; i++)
sz += strlen(argv[i]) + 1;
str = malloc(sz);
memset(str, 0, sz);
for (i = 0; i < argc; i++) {
if (i)
strcat(str, " ");
strcat(str, argv[i]);
}
if (!dm_task_set_message(dmt, str))
goto out;
free(str);
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
static int _version(int argc, char **argv, void *data)
{
int r = 0;
struct dm_task *dmt;
char version[80];
if (dm_get_library_version(version, sizeof(version)))
printf("Library version: %s\n", version);
if (!(dmt = dm_task_create(DM_DEVICE_VERSION)))
return 0;
if (!dm_task_run(dmt))
goto out;
if (!dm_task_get_driver_version(dmt, (char *) &version,
sizeof(version))) {
goto out;
}
printf("Driver version: %s\n", version);
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
static int _simple(int task, const char *name, uint32_t event_nr, int display)
{
int r = 0;
struct dm_task *dmt;
if (!(dmt = dm_task_create(task)))
return 0;
if (!_set_task_device(dmt, name, 0))
goto out;
if (event_nr && !dm_task_set_event_nr(dmt, event_nr))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
r = dm_task_run(dmt);
if (r && display && _switches[VERBOSE_ARG])
r = _display_info(dmt);
out:
dm_task_destroy(dmt);
return r;
}
static int _remove_all(int argc, char **argv, void *data)
{
return _simple(DM_DEVICE_REMOVE_ALL, "", 0, 0);
}
static int _remove(int argc, char **argv, void *data)
{
return _simple(DM_DEVICE_REMOVE, argc > 1 ? argv[1] : NULL, 0, 0);
}
static int _suspend(int argc, char **argv, void *data)
{
return _simple(DM_DEVICE_SUSPEND, argc > 1 ? argv[1] : NULL, 0, 1);
}
static int _resume(int argc, char **argv, void *data)
{
return _simple(DM_DEVICE_RESUME, argc > 1 ? argv[1] : NULL, 0, 1);
}
static int _clear(int argc, char **argv, void *data)
{
return _simple(DM_DEVICE_CLEAR, argc > 1 ? argv[1] : NULL, 0, 1);
}
static int _wait(int argc, char **argv, void *data)
{
const char *name = NULL;
if (!_switches[UUID_ARG] && !_switches[MAJOR_ARG]) {
if (argc == 1) {
err("No device specified.");
return 0;
}
name = argv[1];
argc--, argv++;
}
return _simple(DM_DEVICE_WAITEVENT, name,
(argc > 1) ? atoi(argv[argc - 1]) : 0, 1);
}
static int _process_all(int argc, char **argv,
int (*fn) (int argc, char **argv, void *data))
{
int r = 1;
struct dm_names *names;
unsigned next = 0;
struct dm_task *dmt;
if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
return 0;
if (!dm_task_run(dmt)) {
r = 0;
goto out;
}
if (!(names = dm_task_get_names(dmt))) {
r = 0;
goto out;
}
if (!names->dev) {
printf("No devices found\n");
goto out;
}
do {
names = (void *) names + next;
if (!fn(argc, argv, (void *) names))
r = 0;
next = names->next;
} while (next);
out:
dm_task_destroy(dmt);
return r;
}
static void _display_dev(struct dm_task *dmt, char *name)
{
struct dm_info info;
if (dm_task_get_info(dmt, &info))
printf("%s\t(%u, %u)\n", name, info.major, info.minor);
}
static int _mknodes_single(char *name)
{
struct dm_task *dmt;
int r = 0;
if (!(dmt = dm_task_create(DM_DEVICE_MKNODES)))
return 0;
if (!_set_task_device(dmt, name, 1))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
static int _mknodes(int argc, char **argv, void *data)
{
return _mknodes_single(argc > 1 ? argv[1] : NULL);
}
static int _exec_command(char *name)
{
int n;
static char path[PATH_MAX];
static char *args[ARGS_MAX + 1];
static int argc = 0;
char *c;
pid_t pid;
if (argc < 0)
return 0;
if (!_mknodes_single(name))
return 0;
n = snprintf(path, sizeof(path), "%s/%s", dm_dir(), name);
if (n < 0 || n > sizeof(path) - 1)
return 0;
if (!argc) {
c = _command;
while (argc < ARGS_MAX) {
while (*c && isspace(*c))
c++;
if (!*c)
break;
args[argc++] = c;
while (*c && !isspace(*c))
c++;
if (*c)
*c++ = '\0';
}
if (!argc) {
argc = -1;
return 0;
}
if (argc == ARGS_MAX) {
err("Too many args to --exec\n");
argc = -1;
return 0;
}
args[argc++] = path;
args[argc] = NULL;
}
if (!(pid = fork())) {
execvp(args[0], args);
exit(127);
} else if (pid < (pid_t) 0)
return 0;
TEMP_FAILURE_RETRY(waitpid(pid, NULL, 0));
return 1;
}
static int _status(int argc, char **argv, void *data)
{
int r = 0;
struct dm_task *dmt;
void *next = NULL;
uint64_t start, length;
char *target_type = NULL;
char *params;
int cmd;
struct dm_names *names = (struct dm_names *) data;
char *name = NULL;
int matched = 0;
int ls_only = 0;
if (data)
name = names->name;
else {
if (argc == 1 && !_switches[UUID_ARG] && !_switches[MAJOR_ARG])
return _process_all(argc, argv, _status);
if (argc == 2)
name = argv[1];
}
if (!strcmp(argv[0], "table"))
cmd = DM_DEVICE_TABLE;
else
cmd = DM_DEVICE_STATUS;
if (!strcmp(argv[0], "ls"))
ls_only = 1;
if (!(dmt = dm_task_create(cmd)))
return 0;
if (!_set_task_device(dmt, name, 0))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
if (!name)
name = (char *) dm_task_get_name(dmt);
/* Fetch targets and print 'em */
do {
next = dm_get_next_target(dmt, next, &start, &length,
&target_type, &params);
/* Skip if target type doesn't match */
if (_switches[TARGET_ARG] &&
(!target_type || strcmp(target_type, _target)))
continue;
if (ls_only) {
if (!_switches[EXEC_ARG] || !_command ||
_switches[VERBOSE_ARG])
_display_dev(dmt, name);
next = NULL;
} else if (!_switches[EXEC_ARG] || !_command ||
_switches[VERBOSE_ARG]) {
if (!matched && _switches[VERBOSE_ARG])
_display_info(dmt);
if (data && !_switches[VERBOSE_ARG])
printf("%s: ", name);
if (target_type) {
printf("%" PRIu64 " %" PRIu64 " %s %s",
start, length, target_type, params);
}
printf("\n");
}
matched = 1;
} while (next);
if (data && _switches[VERBOSE_ARG] && matched && !ls_only)
printf("\n");
if (matched && _switches[EXEC_ARG] && _command && !_exec_command(name))
goto out;
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
/* Show target names and their version numbers */
static int _targets(int argc, char **argv, void *data)
{
int r = 0;
struct dm_task *dmt;
struct dm_versions *target;
struct dm_versions *last_target;
if (!(dmt = dm_task_create(DM_DEVICE_LIST_VERSIONS)))
return 0;
if (!dm_task_run(dmt))
goto out;
target = dm_task_get_versions(dmt);
/* Fetch targets and print 'em */
do {
last_target = target;
printf("%-16s v%d.%d.%d\n", target->name, target->version[0],
target->version[1], target->version[2]);
target = (void *) target + target->next;
} while (last_target != target);
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
static int _info(int argc, char **argv, void *data)
{
int r = 0;
struct dm_task *dmt;
struct dm_names *names = (struct dm_names *) data;
char *name = NULL;
if (data)
name = names->name;
else {
if (argc == 1 && !_switches[UUID_ARG] && !_switches[MAJOR_ARG])
return _process_all(argc, argv, _info);
if (argc == 2)
name = argv[1];
}
if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
return 0;
if (!_set_task_device(dmt, name, 0))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
r = _display_info(dmt);
out:
dm_task_destroy(dmt);
return r;
}
static int _deps(int argc, char **argv, void *data)
{
int r = 0;
uint32_t i;
struct dm_deps *deps;
struct dm_task *dmt;
struct dm_info info;
struct dm_names *names = (struct dm_names *) data;
char *name = NULL;
if (data)
name = names->name;
else {
if (argc == 1 && !_switches[UUID_ARG] && !_switches[MAJOR_ARG])
return _process_all(argc, argv, _deps);
if (argc == 2)
name = argv[1];
}
if (!(dmt = dm_task_create(DM_DEVICE_DEPS)))
return 0;
if (!_set_task_device(dmt, name, 0))
goto out;
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
if (!dm_task_run(dmt))
goto out;
if (!dm_task_get_info(dmt, &info))
goto out;
if (!(deps = dm_task_get_deps(dmt)))
goto out;
if (!info.exists) {
printf("Device does not exist.\n");
r = 1;
goto out;
}
if (_switches[VERBOSE_ARG])
_display_info(dmt);
if (data && !_switches[VERBOSE_ARG])
printf("%s: ", name);
printf("%d dependencies\t:", deps->count);
for (i = 0; i < deps->count; i++)
printf(" (%d, %d)",
(int) MAJOR(deps->device[i]),
(int) MINOR(deps->device[i]));
printf("\n");
if (data && _switches[VERBOSE_ARG])
printf("\n");
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
static int _display_name(int argc, char **argv, void *data)
{
struct dm_names *names = (struct dm_names *) data;
printf("%s\t(%d, %d)\n", names->name,
(int) MAJOR(names->dev), (int) MINOR(names->dev));
return 1;
}
static int _ls(int argc, char **argv, void *data)
{
if ((_switches[TARGET_ARG] && _target) ||
(_switches[EXEC_ARG] && _command))
return _status(argc, argv, data);
else
return _process_all(argc, argv, _display_name);
}
/*
* dispatch table
*/
typedef int (*command_fn) (int argc, char **argv, void *data);
struct command {
const char *name;
const char *help;
int min_args;
int max_args;
command_fn fn;
};
static struct command _commands[] = {
{"create", "<dev_name> [-j|--major <major> -m|--minor <minor>]\n"
"\t [-u|uuid <uuid>] [--notable] [<table_file>]",
1, 2, _create},
{"remove", "<device>", 0, 1, _remove},
{"remove_all", "", 0, 0, _remove_all},
{"suspend", "<device>", 0, 1, _suspend},
{"resume", "<device>", 0, 1, _resume},
{"load", "<device> [<table_file>]", 0, 2, _load},
{"clear", "<device>", 0, 1, _clear},
{"reload", "<device> [<table_file>]", 0, 2, _load},
{"rename", "<device> <new_name>", 1, 2, _rename},
{"message", "<device> <sector> <message>", 2, -1, _message},
{"ls", "[--target <target_type>] [--exec <command>]", 0, 0, _ls},
{"info", "[<device>]", 0, 1, _info},
{"deps", "[<device>]", 0, 1, _deps},
{"status", "[<device>] [--target <target_type>]", 0, 1, _status},
{"table", "[<device>] [--target <target_type>]", 0, 1, _status},
{"wait", "<device> [<event_nr>]", 0, 2, _wait},
{"mknodes", "[<device>]", 0, 1, _mknodes},
{"targets", "", 0, 0, _targets},
{"version", "", 0, 0, _version},
{NULL, NULL, 0, 0, NULL}
};
static void _usage(FILE *out)
{
int i;
fprintf(out, "Usage:\n\n");
fprintf(out, "dmsetup [--version] [-v|--verbose [-v|--verbose ...]]\n"
" [-r|--readonly] [--noopencount]\n\n");
for (i = 0; _commands[i].name; i++)
fprintf(out, "\t%s %s\n", _commands[i].name, _commands[i].help);
fprintf(out, "\n<device> may be device name or -u <uuid> or "
"-j <major> -m <minor>\n");
fprintf(out, "Table_file contents may be supplied on stdin.\n\n");
return;
}
static struct command *_find_command(const char *name)
{
int i;
for (i = 0; _commands[i].name; i++)
if (!strcmp(_commands[i].name, name))
return _commands + i;
return NULL;
}
static int _process_switches(int *argc, char ***argv)
{
char *base, *namebase;
static int ind;
int c;
#ifdef HAVE_GETOPTLONG
static struct option long_options[] = {
{"readonly", 0, &ind, READ_ONLY},
{"columns", 0, &ind, COLS_ARG},
{"exec", 1, &ind, EXEC_ARG},
{"major", 1, &ind, MAJOR_ARG},
{"minor", 1, &ind, MINOR_ARG},
{"noheadings", 0, &ind, NOHEADINGS_ARG},
{"noopencount", 0, &ind, NOOPENCOUNT_ARG},
{"notable", 0, &ind, NOTABLE_ARG},
{"options", 1, &ind, OPTIONS_ARG},
{"target", 1, &ind, TARGET_ARG},
{"uuid", 1, &ind, UUID_ARG},
{"verbose", 1, &ind, VERBOSE_ARG},
{"version", 0, &ind, VERSION_ARG},
{"", 0, NULL, 0}
};
#else
struct option long_options;
#endif
/*
* Zero all the index counts.
*/
memset(&_switches, 0, sizeof(_switches));
memset(&_values, 0, sizeof(_values));
namebase = strdup((*argv)[0]);
base = basename(namebase);
if (!strcmp(base, "devmap_name")) {
free(namebase);
_switches[COLS_ARG]++;
_switches[NOHEADINGS_ARG]++;
_switches[OPTIONS_ARG]++;
_switches[MAJOR_ARG]++;
_switches[MINOR_ARG]++;
_fields = (char *) "name";
if (*argc == 3) {
_values[MAJOR_ARG] = atoi((*argv)[1]);
_values[MINOR_ARG] = atoi((*argv)[2]);
*argc -= 2;
*argv += 2;
} else if ((*argc == 2) &&
(2 == sscanf((*argv)[1], "%i:%i",
&_values[MAJOR_ARG],
&_values[MINOR_ARG]))) {
*argc -= 1;
*argv += 1;
} else {
fprintf(stderr, "Usage: devmap_name <major> <minor>\n");
return 0;
}
(*argv)[0] = (char *) "info";
return 1;
}
free(namebase);
optarg = 0;
optind = OPTIND_INIT;
while ((ind = -1, c = GETOPTLONG_FN(*argc, *argv, "cCj:m:no:ru:v",
long_options, NULL)) != -1) {
if (c == 'c' || c == 'C' || ind == COLS_ARG)
_switches[COLS_ARG]++;
if (c == 'r' || ind == READ_ONLY)
_switches[READ_ONLY]++;
if (c == 'j' || ind == MAJOR_ARG) {
_switches[MAJOR_ARG]++;
_values[MAJOR_ARG] = atoi(optarg);
}
if (c == 'm' || ind == MINOR_ARG) {
_switches[MINOR_ARG]++;
_values[MINOR_ARG] = atoi(optarg);
}
if (c == 'n' || ind == NOTABLE_ARG)
_switches[NOTABLE_ARG]++;
if (c == 'o' || ind == OPTIONS_ARG) {
_switches[OPTIONS_ARG]++;
_fields = optarg;
}
if (c == 'v' || ind == VERBOSE_ARG)
_switches[VERBOSE_ARG]++;
if (c == 'u' || ind == UUID_ARG) {
_switches[UUID_ARG]++;
_uuid = optarg;
}
if ((ind == EXEC_ARG)) {
_switches[EXEC_ARG]++;
_command = optarg;
}
if ((ind == TARGET_ARG)) {
_switches[TARGET_ARG]++;
_target = optarg;
}
if ((ind == NOHEADINGS_ARG))
_switches[NOHEADINGS_ARG]++;
if ((ind == NOOPENCOUNT_ARG))
_switches[NOOPENCOUNT_ARG]++;
if ((ind == VERSION_ARG))
_switches[VERSION_ARG]++;
}
if (_switches[VERBOSE_ARG] > 1)
dm_log_init_verbose(_switches[VERBOSE_ARG] - 1);
if ((_switches[MAJOR_ARG] && !_switches[MINOR_ARG]) ||
(!_switches[MAJOR_ARG] && _switches[MINOR_ARG])) {
fprintf(stderr, "Please specify both major number and "
"minor number.\n");
return 0;
}
if (_switches[OPTIONS_ARG] && strcmp(_fields, "name")) {
fprintf(stderr, "Only -o name is supported so far.\n");
return 0;
}
*argv += optind;
*argc -= optind;
return 1;
}
int main(int argc, char **argv)
{
struct command *c;
if (!_process_switches(&argc, &argv)) {
fprintf(stderr, "Couldn't process command line.\n");
exit(1);
}
if (_switches[VERSION_ARG]) {
c = _find_command("version");
goto doit;
}
if (argc == 0) {
_usage(stderr);
exit(1);
}
if (!(c = _find_command(argv[0]))) {
fprintf(stderr, "Unknown command\n");
_usage(stderr);
exit(1);
}
if (argc < c->min_args + 1 ||
(c->max_args >= 0 && argc > c->max_args + 1)) {
fprintf(stderr, "Incorrect number of arguments\n");
_usage(stderr);
exit(1);
}
doit:
if (!c->fn(argc, argv, NULL)) {
fprintf(stderr, "Command failed\n");
exit(1);
}
return 0;
}
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