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lvm2/tools/command.c
David Teigland c0f2a59993 commands: skip parsing command defs for other command names 
The base command name can be used to skip parsing
command defs that will not be needed.
2017-02-14 10:16:13 -06:00

2728 lines
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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2017 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <asm/types.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdint.h>
#include <stdarg.h>
#include <limits.h>
#include <unistd.h>
#include <syslog.h>
#include <sched.h>
#include <dirent.h>
#include <ctype.h>
#include <getopt.h>
/*
* This file can be compiled by itself as a man page generator.
*/
#ifdef MAN_PAGE_GENERATOR
#define log_error(fmt, args...) \
do { \
printf(fmt "\n", ##args); \
} while (0)
/* needed to include args.h */
#define ARG_COUNTABLE 0x00000001
#define ARG_GROUPABLE 0x00000002
struct cmd_context;
struct arg_values;
/* needed to include args.h */
static inline int yes_no_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int activation_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int cachemode_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int discards_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int mirrorlog_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int size_kb_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int size_mb_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int size_mb_arg_with_percent(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int int_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int uint32_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int int_arg_with_sign(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int int_arg_with_sign_and_percent(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int major_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int minor_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int string_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int tag_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int permission_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int metadatatype_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int units_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int segtype_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int alloc_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int locktype_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int readahead_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int regionsize_arg(struct cmd_context *cmd, struct arg_values *av) { return 0; }
static inline int vgmetadatacopies_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av) { return 0; }
static inline int pvmetadatacopies_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av) { return 0; }
static inline int metadatacopies_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av) { return 0; }
static inline int polloperation_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av) { return 0; }
static inline int writemostly_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av) { return 0; }
static inline int syncaction_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av) { return 0; }
static inline int reportformat_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av) { return 0; }
static inline int configreport_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av) { return 0; }
static inline int configtype_arg(struct cmd_context *cmd __attribute__((unused)), struct arg_values *av) { return 0; }
/* needed to include commands.h when building man page generator */
#define CACHE_VGMETADATA 0x00000001
#define PERMITTED_READ_ONLY 0x00000002
#define ALL_VGS_IS_DEFAULT 0x00000004
#define ENABLE_ALL_DEVS 0x00000008
#define ALLOW_UUID_AS_NAME 0x00000010
#define LOCKD_VG_SH 0x00000020
#define NO_METADATA_PROCESSING 0x00000040
#define REQUIRES_FULL_LABEL_SCAN 0x00000080
#define MUST_USE_ALL_ARGS 0x00000100
#define NO_LVMETAD_AUTOSCAN 0x00000200
#define ENABLE_DUPLICATE_DEVS 0x00000400
#define DISALLOW_TAG_ARGS 0x00000800
#define GET_VGNAME_FROM_OPTIONS 0x00001000
/* create foo_CMD enums for command def ID's in command-lines.in */
enum {
#define cmd(a, b) a ,
#include "cmds.h"
#undef cmd
};
/* create foo_VAL enums for option and position values */
enum {
#define val(a, b, c, d) a ,
#include "vals.h"
#undef val
};
/* create foo_ARG enums for --option's */
enum {
#define arg(a, b, c, d, e, f, g) a ,
#include "args.h"
#undef arg
};
/* create foo_LVP enums for LV properties */
enum {
#define lvp(a, b, c) a,
#include "lv_props.h"
#undef lvp
};
/* create foo_LVT enums for LV types */
enum {
#define lvt(a, b, c) a,
#include "lv_types.h"
#undef lvt
};
#else
#include "tools.h"
#endif
#include "command.h" /* defines struct command */
#include "command-count.h" /* defines COMMAND_COUNT */
/* see opt_names[] below, also see arg_props[] in tools.h and args.h */
struct opt_name {
const char *name; /* "foo_ARG" */
int opt_enum; /* foo_ARG */
const char short_opt; /* -f */
char _padding[7];
const char *long_opt; /* --foo */
int val_enum; /* xyz_VAL when --foo takes a val like "--foo xyz" */
uint32_t unused1;
uint32_t unused2;
const char *desc;
};
/* see val_names[] below, also see val_props[] in tools.h and vals.h */
struct val_name {
const char *enum_name; /* "foo_VAL" */
int val_enum; /* foo_VAL */
int (*fn) (struct cmd_context *cmd, struct arg_values *av); /* foo_arg() */
const char *name; /* FooVal */
const char *usage;
};
/* see lvp_names[] below, also see lv_props[] in tools.h and lv_props.h */
struct lvp_name {
const char *enum_name; /* "is_foo_LVP" */
int lvp_enum; /* is_foo_LVP */
const char *name; /* "lv_is_foo" */
};
/* see lvt_names[] below, also see lv_types[] in tools.h and lv_types.h */
struct lvt_name {
const char *enum_name; /* "foo_LVT" */
int lvt_enum; /* foo_LVT */
const char *name; /* "foo" */
};
/* see cmd_names[] below, one for each unique "ID" in command-lines.in */
struct cmd_name {
const char *enum_name; /* "foo_CMD" */
int cmd_enum; /* foo_CMD */
const char *name; /* "foo" from string after ID: */
};
/* create table of value names, e.g. String, and corresponding enum from vals.h */
struct val_name val_names[VAL_COUNT + 1] = {
#define val(a, b, c, d) { # a, a, b, c, d },
#include "vals.h"
#undef val
};
/* create table of option names, e.g. --foo, and corresponding enum from args.h */
struct opt_name opt_names[ARG_COUNT + 1] = {
#define arg(a, b, c, d, e, f, g) { # a, a, b, "", "--" c, d, e, f, g },
#include "args.h"
#undef arg
};
/* create table of lv property names, e.g. lv_is_foo, and corresponding enum from lv_props.h */
struct lvp_name lvp_names[LVP_COUNT + 1] = {
#define lvp(a, b, c) { # a, a, b },
#include "lv_props.h"
#undef lvp
};
/* create table of lv type names, e.g. linear and corresponding enum from lv_types.h */
struct lvt_name lvt_names[LVT_COUNT + 1] = {
#define lvt(a, b, c) { # a, a, b },
#include "lv_types.h"
#undef lvt
};
/* create table of command IDs */
struct cmd_name cmd_names[CMD_COUNT + 1] = {
#define cmd(a, b) { # a, a, # b },
#include "cmds.h"
#undef cmd
};
/*
* command_names[] and commands[] are defined in lvmcmdline.c when building lvm,
* but need to be defined here when building the stand-alone man page generator.
*/
#ifdef MAN_PAGE_GENERATOR
struct command_name command_names[MAX_COMMAND_NAMES] = {
#define xx(a, b, c...) { # a, b, c },
#include "commands.h"
#undef xx
};
struct command commands[COMMAND_COUNT];
#else
extern struct command_name command_names[MAX_COMMAND_NAMES]; /* defined in lvmcmdline.c */
extern struct command commands[COMMAND_COUNT]; /* defined in lvmcmdline.c */
#endif
/* array of pointers into opt_names[] that is sorted alphabetically (by long opt name) */
struct opt_name *opt_names_alpha[ARG_COUNT + 1];
/* lvm_all is for recording options that are common for all lvm commands */
struct command lvm_all;
/* saves OO_FOO lines (groups of optional options) to include in multiple defs */
static int oo_line_count;
#define MAX_OO_LINES 256
struct oo_line {
char *name;
char *line;
};
static struct oo_line oo_lines[MAX_OO_LINES];
#define REQUIRED 1 /* required option */
#define OPTIONAL 0 /* optional option */
#define IGNORE -1 /* ignore option */
#define MAX_LINE 1024
#define MAX_LINE_ARGC 256
#define DESC_LINE 1024
/*
* Contains _command_input[] which is command-lines.in with comments
* removed and wrapped as a string. The _command_input[] string is
* used to populate commands[].
*/
#include "command-lines-input.h"
static void add_optional_opt_line(struct command *cmd, int argc, char *argv[]);
/*
* modifies buf, replacing the sep characters with \0
* argv pointers point to positions in buf
*/
static char *split_line(char *buf, int *argc, char **argv, char sep)
{
char *p = buf, *rp = NULL;
int i;
argv[0] = p;
for (i = 1; i < MAX_LINE_ARGC; i++) {
p = strchr(buf, sep);
if (!p)
break;
*p = '\0';
argv[i] = p + 1;
buf = p + 1;
}
*argc = i;
/* we ended by hitting \0, return the point following that */
if (!rp)
rp = strchr(buf, '\0') + 1;
return rp;
}
/* convert value string, e.g. Number, to foo_VAL enum */
static int val_str_to_num(char *str)
{
char name[32] = { 0 };
char *new;
int i;
/* compare the name before any suffix like _new or _<lvtype> */
strncpy(name, str, 31);
if ((new = strstr(name, "_")))
*new = '\0';
for (i = 0; i < VAL_COUNT; i++) {
if (!val_names[i].name)
break;
if (!strncmp(name, val_names[i].name, strlen(val_names[i].name)))
return val_names[i].val_enum;
}
return 0;
}
/* convert "--option" to foo_ARG enum */
#define MAX_LONG_OPT_NAME_LEN 32
static int opt_str_to_num(char *str)
{
char long_name[MAX_LONG_OPT_NAME_LEN];
char *p;
int i;
/*
* --foo_long means there are two args entries
* for --foo, one with a short option and one
* without, and we want the one without the
* short option.
*/
if (strstr(str, "_long")) {
memset(long_name, 0, sizeof(long_name));
strncpy(long_name, str, MAX_LONG_OPT_NAME_LEN-1);
if ((p = strstr(long_name, "_long")))
*p = '\0';
for (i = 0; i < ARG_COUNT; i++) {
if (!opt_names[i].long_opt)
continue;
/* skip anything with a short opt */
if (opt_names[i].short_opt)
continue;
if (!strcmp(opt_names[i].long_opt, long_name))
return opt_names[i].opt_enum;
}
log_error("Parsing command defs: unknown opt str: %s %s", str, long_name);
exit(EXIT_FAILURE);
}
for (i = 0; i < ARG_COUNT; i++) {
if (!opt_names[i].long_opt)
continue;
/* These are only selected using --foo_long */
if (strstr(opt_names[i].name, "_long_ARG"))
continue;
if (!strcmp(opt_names[i].long_opt, str))
return opt_names[i].opt_enum;
}
log_error("Parsing command defs: unknown opt str: \"%s\"", str);
exit(EXIT_FAILURE);
}
/* "foo" string to foo_CMD int */
int command_id_to_enum(const char *str)
{
int i;
for (i = 1; i < CMD_COUNT; i++) {
if (!strcmp(str, cmd_names[i].name))
return cmd_names[i].cmd_enum;
}
log_error("Parsing command defs: unknown cmd name %s", str);
exit(EXIT_FAILURE);
}
/* "lv_is_prop" to is_prop_LVP */
static int lvp_name_to_enum(char *str)
{
int i;
for (i = 1; i < LVP_COUNT; i++) {
if (!strcmp(str, lvp_names[i].name))
return lvp_names[i].lvp_enum;
}
log_error("Parsing command defs: unknown lv property %s", str);
exit(EXIT_FAILURE);
}
/* "type" to type_LVT */
static int lvt_name_to_enum(char *str)
{
int i;
for (i = 1; i < LVT_COUNT; i++) {
if (!strcmp(str, lvt_names[i].name))
return lvt_names[i].lvt_enum;
}
log_error("Parsing command defs: unknown lv type %s", str);
exit(EXIT_FAILURE);
}
/* LV_<type> to <type>_LVT */
static int lv_to_enum(char *name)
{
return lvt_name_to_enum(name + 3);
}
/*
* LV_<type1>_<type2> to lvt_bits
*
* type1 to lvt_enum
* lvt_bits |= lvt_enum_to_bit(lvt_enum)
* type2 to lvt_enum
* lvt_bits |= lvt_enum_to_bit(lvt_enum)
*/
#define LVTYPE_LEN 64
static uint64_t lv_to_bits(char *name)
{
char buf[LVTYPE_LEN];
char *argv[MAX_LINE_ARGC];
uint64_t lvt_bits = 0;
int lvt_enum;
int argc;
int i;
memset(buf, 0, sizeof(buf));
strncpy(buf, name, LVTYPE_LEN-1);
split_line(buf, &argc, argv, '_');
/* 0 is "LV" */
for (i = 1; i < argc; i++) {
if (!strcmp(argv[i], "new"))
continue;
lvt_enum = lvt_name_to_enum(argv[i]);
lvt_bits |= lvt_enum_to_bit(lvt_enum);
}
return lvt_bits;
}
static struct command_name *find_command_name(const char *name)
{
int i;
for (i = 0; i < MAX_COMMAND_NAMES; i++) {
if (!command_names[i].name)
break;
if (!strcmp(command_names[i].name, name))
return &command_names[i];
}
return NULL;
}
static const char *is_command_name(char *str)
{
int i;
for (i = 0; i < MAX_COMMAND_NAMES; i++) {
if (!command_names[i].name)
break;
if (!strcmp(command_names[i].name, str))
return command_names[i].name;
}
return NULL;
}
static int is_opt_name(char *str)
{
if (!strncmp(str, "--", 2))
return 1;
if ((str[0] == '-') && (str[1] != '-')) {
log_error("Parsing command defs: options must be specified in long form: %s", str);
exit(EXIT_FAILURE);
}
return 0;
}
/*
* "Select" as a pos name means that the position
* can be empty if the --select option is used.
*/
static int is_pos_name(char *str)
{
if (!strncmp(str, "VG", 2))
return 1;
if (!strncmp(str, "LV", 2))
return 1;
if (!strncmp(str, "PV", 2))
return 1;
if (!strncmp(str, "Tag", 3))
return 1;
if (!strncmp(str, "String", 6))
return 1;
if (!strncmp(str, "Select", 6))
return 1;
return 0;
}
static int is_oo_definition(char *str)
{
if (!strncmp(str, "OO_", 3) && strstr(str, ":"))
return 1;
return 0;
}
static int is_oo_line(char *str)
{
if (!strncmp(str, "OO:", 3))
return 1;
return 0;
}
static int is_io_line(char *str)
{
if (!strncmp(str, "IO:", 3))
return 1;
return 0;
}
static int is_op_line(char *str)
{
if (!strncmp(str, "OP:", 3))
return 1;
return 0;
}
static int is_desc_line(char *str)
{
if (!strncmp(str, "DESC:", 5))
return 1;
return 0;
}
static int is_flags_line(char *str)
{
if (!strncmp(str, "FLAGS:", 6))
return 1;
return 0;
}
static int is_rule_line(char *str)
{
if (!strncmp(str, "RULE:", 5))
return 1;
return 0;
}
static int is_id_line(char *str)
{
if (!strncmp(str, "ID:", 3))
return 1;
return 0;
}
/*
* Save a positional arg in a struct arg_def.
* Parse str for anything that can appear in a position,
* like VG, VG|LV, VG|LV_linear|LV_striped, etc.
*/
static void set_pos_def(struct command *cmd, char *str, struct arg_def *def)
{
char *argv[MAX_LINE_ARGC];
int argc;
char *name;
int val_enum;
int i;
split_line(str, &argc, argv, '|');
for (i = 0; i < argc; i++) {
name = argv[i];
val_enum = val_str_to_num(name);
if (!val_enum) {
log_error("Parsing command defs: unknown pos arg: %s", name);
exit(EXIT_FAILURE);
}
def->val_bits |= val_enum_to_bit(val_enum);
if ((val_enum == lv_VAL) && strstr(name, "_"))
def->lvt_bits = lv_to_bits(name);
if (strstr(name, "_new")) {
if (val_enum == lv_VAL)
def->flags |= ARG_DEF_FLAG_NEW_LV;
else if (val_enum == vg_VAL)
def->flags |= ARG_DEF_FLAG_NEW_VG;
}
}
}
/*
* Save an option arg in a struct arg_def.
* Parse str for anything that can follow --option.
*/
static void set_opt_def(struct command *cmd, char *str, struct arg_def *def)
{
char *argv[MAX_LINE_ARGC];
int argc;
char *name;
int val_enum;
int i;
split_line(str, &argc, argv, '|');
for (i = 0; i < argc; i++) {
name = argv[i];
val_enum = val_str_to_num(name);
if (!val_enum) {
/* a literal number or string */
if (isdigit(name[0]))
val_enum = constnum_VAL;
else if (isalpha(name[0]))
val_enum = conststr_VAL;
else {
log_error("Parsing command defs: unknown opt arg: %s", name);
exit(EXIT_FAILURE);
}
}
def->val_bits |= val_enum_to_bit(val_enum);
if (val_enum == constnum_VAL)
def->num = (uint64_t)atoi(name);
if (val_enum == conststr_VAL)
def->str = strdup(name);
if (val_enum == lv_VAL) {
if (strstr(name, "_"))
def->lvt_bits = lv_to_bits(name);
}
if (strstr(name, "_new")) {
if (val_enum == lv_VAL)
def->flags |= ARG_DEF_FLAG_NEW_LV;
else if (val_enum == vg_VAL)
def->flags |= ARG_DEF_FLAG_NEW_VG;
}
}
}
/*
* Save a set of common options so they can be included in
* multiple command defs.
*
* OO_FOO: --opt1 ...
*
* oo->name = "OO_FOO";
* oo->line = "--opt1 ...";
*/
static void add_oo_definition_line(const char *name, const char *line)
{
struct oo_line *oo;
char *colon;
char *start;
oo = &oo_lines[oo_line_count++];
oo->name = strdup(name);
if ((colon = strstr(oo->name, ":")))
*colon = '\0';
else {
log_error("Parsing command defs: invalid OO definition");
exit(EXIT_FAILURE);
}
start = strstr(line, ":") + 2;
oo->line = strdup(start);
}
/* Support OO_FOO: continuing on multiple lines. */
static void append_oo_definition_line(const char *new_line)
{
struct oo_line *oo;
char *old_line;
char *line;
int len;
oo = &oo_lines[oo_line_count-1];
old_line = oo->line;
/* +2 = 1 space between old and new + 1 terminating \0 */
len = strlen(old_line) + strlen(new_line) + 2;
line = malloc(len);
if (!line) {
log_error("Parsing command defs: no memory");
exit(EXIT_FAILURE);
}
memset(line, 0, len);
strcat(line, old_line);
strcat(line, " ");
strcat(line, new_line);
free(oo->line);
oo->line = line;
}
/* Find a saved OO_FOO definition. */
#define OO_NAME_LEN 64
static char *get_oo_line(const char *str)
{
char *name;
char *end;
char str2[OO_NAME_LEN];
int i;
memset(str2, 0, sizeof(str2));
strncpy(str2, str, OO_NAME_LEN-1);
if ((end = strstr(str2, ":")))
*end = '\0';
if ((end = strstr(str2, ",")))
*end = '\0';
for (i = 0; i < oo_line_count; i++) {
name = oo_lines[i].name;
if (!strcmp(name, str2))
return oo_lines[i].line;
}
return NULL;
}
/*
* Add optional_opt_args entries when OO_FOO appears on OO: line,
* i.e. include common options from an OO_FOO definition.
*/
static void include_optional_opt_args(struct command *cmd, const char *str)
{
char *oo_line;
char *line;
char *line_argv[MAX_LINE_ARGC];
int line_argc;
if (!(oo_line = get_oo_line(str))) {
log_error("Parsing command defs: no OO line found for %s", str);
exit(EXIT_FAILURE);
}
if (!(line = strdup(oo_line)))
exit(EXIT_FAILURE);
split_line(line, &line_argc, line_argv, ' ');
add_optional_opt_line(cmd, line_argc, line_argv);
free(line);
}
/*
* When an --option is seen, add a new opt_args entry for it.
* This function sets the opt_args.opt value for it.
*/
static void add_opt_arg(struct command *cmd, char *str, int *takes_arg, int required)
{
char *comma;
int opt;
/* opt_arg.opt set here */
/* opt_arg.def will be set in update_prev_opt_arg() if needed */
if ((comma = strstr(str, ",")))
*comma = '\0';
/*
* Work around nasty hack where --uuid is used for both uuid_ARG
* and uuidstr_ARG. The input uses --uuidstr, where an actual
* command uses --uuid string.
*/
if (!strcmp(str, "--uuidstr")) {
opt = uuidstr_ARG;
goto skip;
}
opt = opt_str_to_num(str);
skip:
if (required > 0)
cmd->required_opt_args[cmd->ro_count++].opt = opt;
else if (!required)
cmd->optional_opt_args[cmd->oo_count++].opt = opt;
else if (required < 0)
cmd->ignore_opt_args[cmd->io_count++].opt = opt;
else
exit(EXIT_FAILURE);
*takes_arg = opt_names[opt].val_enum ? 1 : 0;
}
/*
* After --option has been seen, this function sets opt_args.def value
* for the value that appears after --option.
*/
static void update_prev_opt_arg(struct command *cmd, char *str, int required)
{
struct arg_def def = { 0 };
char *comma;
if (str[0] == '-') {
log_error("Parsing command defs: option %s must be followed by an arg.", str);
exit(EXIT_FAILURE);
}
/* opt_arg.def set here */
/* opt_arg.opt was previously set in add_opt_arg() when --foo was read */
if ((comma = strstr(str, ",")))
*comma = '\0';
set_opt_def(cmd, str, &def);
if (required > 0)
cmd->required_opt_args[cmd->ro_count-1].def = def;
else if (!required)
cmd->optional_opt_args[cmd->oo_count-1].def = def;
else if (required < 0)
cmd->ignore_opt_args[cmd->io_count-1].def = def;
else
exit(EXIT_FAILURE);
}
/*
* When an position arg is seen, add a new pos_args entry for it.
* This function sets the pos_args.pos and pos_args.def.
*/
static void add_pos_arg(struct command *cmd, char *str, int required)
{
struct arg_def def = { 0 };
/* pos_arg.pos and pos_arg.def are set here */
set_pos_def(cmd, str, &def);
if (required) {
cmd->required_pos_args[cmd->rp_count].pos = cmd->pos_count++;
cmd->required_pos_args[cmd->rp_count].def = def;
cmd->rp_count++;
} else {
cmd->optional_pos_args[cmd->op_count].pos = cmd->pos_count++;;
cmd->optional_pos_args[cmd->op_count].def = def;
cmd->op_count++;
}
}
/* Process something that follows a pos arg, which is not a new pos arg. */
static void update_prev_pos_arg(struct command *cmd, char *str, int required)
{
struct arg_def *def;
/* a previous pos_arg.def is modified here */
if (required)
def = &cmd->required_pos_args[cmd->rp_count-1].def;
else
def = &cmd->optional_pos_args[cmd->op_count-1].def;
if (!strcmp(str, "..."))
def->flags |= ARG_DEF_FLAG_MAY_REPEAT;
else {
log_error("Parsing command defs: unknown pos arg: %s", str);
exit(EXIT_FAILURE);
}
}
/* Process what follows OO:, which are the optional opt args for the cmd def. */
static void add_optional_opt_line(struct command *cmd, int argc, char *argv[])
{
int takes_arg = 0;
int i;
for (i = 0; i < argc; i++) {
if (!i && !strncmp(argv[i], "OO:", 3))
continue;
if (is_opt_name(argv[i]))
add_opt_arg(cmd, argv[i], &takes_arg, OPTIONAL);
else if (!strncmp(argv[i], "OO_", 3))
include_optional_opt_args(cmd, argv[i]);
else if (takes_arg)
update_prev_opt_arg(cmd, argv[i], OPTIONAL);
else {
log_error("Parsing command defs: can't parse argc %d argv %s prev %s",
i, argv[i], argv[i-1]);
exit(EXIT_FAILURE);
}
}
}
/* Process what follows IO:, which are the ignore options for the cmd def. */
static void add_ignore_opt_line(struct command *cmd, int argc, char *argv[])
{
int takes_arg = 0;
int i;
for (i = 0; i < argc; i++) {
if (!i && !strncmp(argv[i], "IO:", 3))
continue;
if (is_opt_name(argv[i]))
add_opt_arg(cmd, argv[i], &takes_arg, IGNORE);
else if (takes_arg)
update_prev_opt_arg(cmd, argv[i], IGNORE);
else {
log_error("Parsing command defs: can't parse argc %d argv %s prev %s",
i, argv[i], argv[i-1]);
exit(EXIT_FAILURE);
}
}
}
/* Process what follows OP:, which are optional pos args for the cmd def. */
static void add_optional_pos_line(struct command *cmd, int argc, char *argv[])
{
int i;
for (i = 0; i < argc; i++) {
if (!i && !strncmp(argv[i], "OP:", 3))
continue;
if (is_pos_name(argv[i]))
add_pos_arg(cmd, argv[i], OPTIONAL);
else
update_prev_pos_arg(cmd, argv[i], OPTIONAL);
}
}
static void add_required_opt_line(struct command *cmd, int argc, char *argv[])
{
int takes_arg = 0;
int i;
for (i = 0; i < argc; i++) {
if (is_opt_name(argv[i]))
add_opt_arg(cmd, argv[i], &takes_arg, REQUIRED);
else if (takes_arg)
update_prev_opt_arg(cmd, argv[i], REQUIRED);
else {
log_error("Parsing command defs: can't parse argc %d argv %s prev %s",
i, argv[i], argv[i-1]);
exit(EXIT_FAILURE);
}
}
}
/*
* Add to required_opt_args from an OO_FOO definition.
* (This is the special case of vgchange/lvchange where one
* optional option is required, and others are then optional.)
* The set of options from OO_FOO are saved in required_opt_args,
* and flag CMD_FLAG_ONE_REQUIRED_OPT is set on the cmd indicating
* this special case.
*/
static void include_required_opt_args(struct command *cmd, char *str)
{
char *oo_line;
char *line;
char *line_argv[MAX_LINE_ARGC];
int line_argc;
if (!(oo_line = get_oo_line(str))) {
log_error("Parsing command defs: no OO line found for %s", str);
exit(EXIT_FAILURE);
}
if (!(line = strdup(oo_line)))
exit(EXIT_FAILURE);
split_line(line, &line_argc, line_argv, ' ');
add_required_opt_line(cmd, line_argc, line_argv);
free(line);
}
/* Process what follows command_name, which are required opt/pos args. */
static void add_required_line(struct command *cmd, int argc, char *argv[])
{
int i;
int takes_arg;
int prev_was_opt = 0, prev_was_pos = 0;
/* argv[0] is command name */
for (i = 1; i < argc; i++) {
if (is_opt_name(argv[i])) {
/* add new required_opt_arg */
add_opt_arg(cmd, argv[i], &takes_arg, REQUIRED);
prev_was_opt = 1;
prev_was_pos = 0;
} else if (prev_was_opt && takes_arg) {
/* set value for previous required_opt_arg */
update_prev_opt_arg(cmd, argv[i], REQUIRED);
prev_was_opt = 0;
prev_was_pos = 0;
} else if (is_pos_name(argv[i])) {
/* add new required_pos_arg */
add_pos_arg(cmd, argv[i], REQUIRED);
prev_was_opt = 0;
prev_was_pos = 1;
} else if (!strncmp(argv[i], "OO_", 3)) {
/* one required_opt_arg is required, special case lv/vgchange */
cmd->cmd_flags |= CMD_FLAG_ONE_REQUIRED_OPT;
include_required_opt_args(cmd, argv[i]);
} else if (prev_was_pos) {
/* set property for previous required_pos_arg */
update_prev_pos_arg(cmd, argv[i], REQUIRED);
} else {
log_error("Parsing command defs: can't parse argc %d argv %s prev %s",
i, argv[i], argv[i-1]);
exit(EXIT_FAILURE);
}
}
}
static void add_flags(struct command *cmd, char *line)
{
if (strstr(line, "SECONDARY_SYNTAX"))
cmd->cmd_flags |= CMD_FLAG_SECONDARY_SYNTAX;
}
#define MAX_RULE_OPTS 64
static void add_rule(struct command *cmd, char *line)
{
struct cmd_rule *rule;
char *line_argv[MAX_LINE_ARGC];
char *arg;
int line_argc;
int i, lvt_enum, lvp_enum;
int check = 0;
if (cmd->rule_count == CMD_MAX_RULES) {
log_error("Parsing command defs: too many rules for cmd");
exit(EXIT_FAILURE);
}
rule = &cmd->rules[cmd->rule_count++];
split_line(line, &line_argc, line_argv, ' ');
for (i = 0; i < line_argc; i++) {
arg = line_argv[i];
if (!strcmp(arg, "not")) {
rule->rule = RULE_INVALID;
check = 1;
}
else if (!strcmp(arg, "and")) {
rule->rule = RULE_REQUIRE;
check = 1;
}
else if (!strncmp(arg, "all", 3)) {
/* opt/lvt_bits/lvp_bits all remain 0 to mean all */
continue;
}
else if (!strncmp(arg, "--", 2)) {
if (!rule->opts) {
if (!(rule->opts = malloc(MAX_RULE_OPTS * sizeof(int)))) {
log_error("Parsing command defs: no mem");
exit(EXIT_FAILURE);
}
memset(rule->opts, 0, MAX_RULE_OPTS * sizeof(int));
}
if (!rule->check_opts) {
if (!(rule->check_opts = malloc(MAX_RULE_OPTS * sizeof(int)))) {
log_error("Parsing command defs: no mem");
exit(EXIT_FAILURE);
}
memset(rule->check_opts, 0, MAX_RULE_OPTS * sizeof(int));
}
if (check)
rule->check_opts[rule->check_opts_count++] = opt_str_to_num(arg);
else
rule->opts[rule->opts_count++] = opt_str_to_num(arg);
}
else if (!strncmp(arg, "LV_", 3)) {
lvt_enum = lv_to_enum(arg);
if (check)
rule->check_lvt_bits |= lvt_enum_to_bit(lvt_enum);
else
rule->lvt_bits |= lvt_enum_to_bit(lvt_enum);
}
else if (!strncmp(arg, "lv_is_", 6)) {
lvp_enum = lvp_name_to_enum(arg);
if (check)
rule->check_lvp_bits |= lvp_enum_to_bit(lvp_enum);
else
rule->lvp_bits |= lvp_enum_to_bit(lvp_enum);
}
}
}
/* The given option is common to all lvm commands (set in lvm_all). */
static int is_lvm_all_opt(int opt)
{
int oo;
for (oo = 0; oo < lvm_all.oo_count; oo++) {
if (lvm_all.optional_opt_args[oo].opt == opt)
return 1;
}
return 0;
}
/* Find common options for all variants of each command name. */
static void factor_common_options(void)
{
int cn, opt_enum, ci, oo, ro, found;
struct command *cmd;
for (cn = 0; cn < MAX_COMMAND_NAMES; cn++) {
if (!command_names[cn].name)
break;
for (ci = 0; ci < COMMAND_COUNT; ci++) {
cmd = &commands[ci];
if (strcmp(cmd->name, command_names[cn].name))
continue;
command_names[cn].variants++;
}
for (opt_enum = 0; opt_enum < ARG_COUNT; opt_enum++) {
for (ci = 0; ci < COMMAND_COUNT; ci++) {
cmd = &commands[ci];
if (strcmp(cmd->name, command_names[cn].name))
continue;
if (cmd->ro_count)
command_names[cn].variant_has_ro = 1;
if (cmd->rp_count)
command_names[cn].variant_has_rp = 1;
if (cmd->oo_count)
command_names[cn].variant_has_oo = 1;
if (cmd->op_count)
command_names[cn].variant_has_op = 1;
for (ro = 0; ro < cmd->ro_count; ro++) {
command_names[cn].all_options[cmd->required_opt_args[ro].opt] = 1;
if ((cmd->required_opt_args[ro].opt == size_ARG) && !strncmp(cmd->name, "lv", 2))
command_names[cn].all_options[extents_ARG] = 1;
}
for (oo = 0; oo < cmd->oo_count; oo++)
command_names[cn].all_options[cmd->optional_opt_args[oo].opt] = 1;
found = 0;
for (oo = 0; oo < cmd->oo_count; oo++) {
if (cmd->optional_opt_args[oo].opt == opt_enum) {
found = 1;
break;
}
}
if (!found)
goto next_opt;
}
/* all commands starting with this name use this option */
command_names[cn].common_options[opt_enum] = 1;
next_opt:
;
}
}
}
static int long_name_compare(const void *on1, const void *on2)
{
struct opt_name **optname1 = (void *)on1;
struct opt_name **optname2 = (void *)on2;
return strcmp((*optname1)->long_opt + 2, (*optname2)->long_opt + 2);
}
/* Create list of option names for printing alphabetically. */
static void create_opt_names_alpha(void)
{
int i;
for (i = 0; i < ARG_COUNT; i++)
opt_names_alpha[i] = &opt_names[i];
qsort(opt_names_alpha, ARG_COUNT, sizeof(long), long_name_compare);
}
static int copy_line(char *line, int max_line, int *position)
{
int p = *position;
int i = 0;
memset(line, 0, max_line);
while (1) {
line[i] = _command_input[p];
i++;
p++;
if (_command_input[p] == '\n') {
p++;
break;
}
if (i == (max_line - 1))
break;
}
*position = p;
return 1;
}
int define_commands(char *run_name)
{
struct command *cmd;
char line[MAX_LINE];
char line_orig[MAX_LINE];
char *line_argv[MAX_LINE_ARGC];
const char *name;
char *n;
int line_argc;
int cmd_count = 0;
int prev_was_oo_def = 0;
int prev_was_oo = 0;
int prev_was_op = 0;
int copy_pos = 0;
int skip = 0;
if (run_name && !strcmp(run_name, "help"))
run_name = NULL;
create_opt_names_alpha();
/* Process each line of command-lines-input.h (from command-lines.in) */
while (copy_line(line, MAX_LINE, &copy_pos)) {
if (line[0] == '\n')
break;
if ((n = strchr(line, '\n')))
*n = '\0';
memcpy(line_orig, line, sizeof(line));
split_line(line, &line_argc, line_argv, ' ');
if (!line_argc)
continue;
/* New cmd def begins: command_name <required opt/pos args> */
if ((name = is_command_name(line_argv[0]))) {
if (cmd_count >= COMMAND_COUNT) {
return 0;
}
/*
* FIXME: when running one specific command name,
* we can optimize by not parsing command defs
* that don't start with that command name.
*/
cmd = &commands[cmd_count];
cmd->command_index = cmd_count;
cmd_count++;
cmd->name = strdup(name);
if (run_name && strcmp(run_name, name)) {
skip = 1;
prev_was_oo_def = 0;
prev_was_oo = 0;
prev_was_op = 0;
continue;
}
skip = 0;
cmd->pos_count = 1;
add_required_line(cmd, line_argc, line_argv);
/* Every cmd gets the OO_ALL options */
include_optional_opt_args(cmd, "OO_ALL:");
continue;
}
/*
* All other kinds of lines are processed in the
* context of the existing command[].
*/
if (is_desc_line(line_argv[0]) && !skip) {
char *desc = strdup(line_orig);
if (cmd->desc) {
int newlen = strlen(cmd->desc) + strlen(desc) + 2;
char *newdesc = malloc(newlen);
if (newdesc) {
memset(newdesc, 0, newlen);
snprintf(newdesc, newlen, "%s %s", cmd->desc, desc);
cmd->desc = newdesc;
free(desc);
}
} else
cmd->desc = desc;
continue;
}
if (is_flags_line(line_argv[0]) && !skip) {
add_flags(cmd, line_orig);
continue;
}
if (is_rule_line(line_argv[0]) && !skip) {
add_rule(cmd, line_orig);
continue;
}
if (is_id_line(line_argv[0])) {
cmd->command_id = strdup(line_argv[1]);
continue;
}
/* OO_FOO: ... */
if (is_oo_definition(line_argv[0])) {
add_oo_definition_line(line_argv[0], line_orig);
prev_was_oo_def = 1;
prev_was_oo = 0;
prev_was_op = 0;
continue;
}
/* OO: ... */
if (is_oo_line(line_argv[0]) && !skip) {
add_optional_opt_line(cmd, line_argc, line_argv);
prev_was_oo_def = 0;
prev_was_oo = 1;
prev_was_op = 0;
continue;
}
/* OP: ... */
if (is_op_line(line_argv[0]) && !skip) {
add_optional_pos_line(cmd, line_argc, line_argv);
prev_was_oo_def = 0;
prev_was_oo = 0;
prev_was_op = 1;
continue;
}
/* IO: ... */
if (is_io_line(line_argv[0]) && !skip) {
add_ignore_opt_line(cmd, line_argc, line_argv);
prev_was_oo = 0;
prev_was_op = 0;
continue;
}
/* handle OO_FOO:, OO:, OP: continuing on multiple lines */
if (prev_was_oo_def) {
append_oo_definition_line(line_orig);
continue;
}
if (prev_was_oo) {
add_optional_opt_line(cmd, line_argc, line_argv);
continue;
}
if (prev_was_op) {
add_optional_pos_line(cmd, line_argc, line_argv);
continue;
}
}
/*
* For usage.
* Looks at all variants of each command name and figures out
* which options are common to all variants (for compact output)
*/
factor_common_options();
/*
* For usage.
* Predefined string of options common to all commands
* (for compact output)
*/
include_optional_opt_args(&lvm_all, "OO_USAGE_COMMON");
return 1;
}
/* type_LVT to "type" */
static const char *lvt_enum_to_name(int lvt_enum)
{
return lvt_names[lvt_enum].name;
}
static void _print_usage_description(struct command *cmd)
{
const char *desc = cmd->desc;
char buf[MAX_LINE] = {0};
int di = 0;
int bi = 0;
for (di = 0; di < strlen(desc); di++) {
if (!strncmp(&desc[di], "DESC:", 5)) {
if (bi) {
buf[bi] = '\0';
printf(" %s\n", buf);
memset(buf, 0, sizeof(buf));
bi = 0;
}
/* skip DESC: */
di += 5;
continue;
}
if (!bi && desc[di] == ' ')
continue;
buf[bi++] = desc[di];
if (bi == (MAX_LINE - 1))
break;
}
if (bi) {
buf[bi] = '\0';
printf(" %s\n", buf);
}
}
static void print_usage_def(struct arg_def *def)
{
int val_enum;
int lvt_enum;
int sep = 0;
for (val_enum = 0; val_enum < VAL_COUNT; val_enum++) {
if (def->val_bits & val_enum_to_bit(val_enum)) {
if (val_enum == conststr_VAL)
printf("%s", def->str);
else if (val_enum == constnum_VAL)
printf("%llu", (unsigned long long)def->num);
else {
if (sep) printf("|");
if (!val_names[val_enum].usage)
printf("%s", val_names[val_enum].name);
else
printf("%s", val_names[val_enum].usage);
sep = 1;
}
if (val_enum == lv_VAL && def->lvt_bits) {
for (lvt_enum = 1; lvt_enum < LVT_COUNT; lvt_enum++) {
if (lvt_bit_is_set(def->lvt_bits, lvt_enum))
printf("_%s", lvt_enum_to_name(lvt_enum));
}
}
if ((val_enum == vg_VAL) && (def->flags & ARG_DEF_FLAG_NEW_VG))
printf("_new");
if ((val_enum == lv_VAL) && (def->flags & ARG_DEF_FLAG_NEW_LV))
printf("_new");
}
}
if (def->flags & ARG_DEF_FLAG_MAY_REPEAT)
printf(" ...");
}
void print_usage(struct command *cmd)
{
struct command_name *cname = find_command_name(cmd->name);
int onereq = (cmd->cmd_flags & CMD_FLAG_ONE_REQUIRED_OPT) ? 1 : 0;
int ro, rp, oo, op, opt_enum, first;
if (cmd->desc)
_print_usage_description(cmd);
printf(" %s", cmd->name);
if (cmd->ro_count) {
first = 1;
for (ro = 0; ro < cmd->ro_count; ro++) {
if (onereq) {
if (first)
printf("\n\t(");
else
printf(",\n\t ");
first = 0;
}
printf(" %s", opt_names[cmd->required_opt_args[ro].opt].long_opt);
if (cmd->required_opt_args[ro].def.val_bits) {
printf(" ");
print_usage_def(&cmd->required_opt_args[ro].def);
}
}
if (onereq)
printf(" )\n");
}
if (cmd->rp_count) {
if (onereq)
printf("\t");
for (rp = 0; rp < cmd->rp_count; rp++) {
if (cmd->required_pos_args[rp].def.val_bits) {
printf(" ");
print_usage_def(&cmd->required_pos_args[rp].def);
}
}
}
if (!cmd->oo_count)
goto op_count;
if (cmd->oo_count) {
first = 1;
for (oo = 0; oo < cmd->oo_count; oo++) {
opt_enum = cmd->optional_opt_args[oo].opt;
/*
* Skip common opts in lvm_all and cname->common_options.
*/
if (is_lvm_all_opt(opt_enum))
continue;
if ((cname->variants > 1) && cname->common_options[opt_enum])
continue;
if (first)
printf("\n\t[");
else
printf(",\n\t ");
first = 0;
printf(" %s", opt_names[opt_enum].long_opt);
if (cmd->optional_opt_args[oo].def.val_bits) {
printf(" ");
print_usage_def(&cmd->optional_opt_args[oo].def);
}
}
if (first)
printf("\n\t[");
else
printf(",\n\t ");
printf(" COMMON_OPTIONS ]");
}
op_count:
if (!cmd->op_count)
goto done;
printf("\n\t[");
if (cmd->op_count) {
for (op = 0; op < cmd->op_count; op++) {
if (cmd->optional_pos_args[op].def.val_bits) {
printf(" ");
print_usage_def(&cmd->optional_pos_args[op].def);
}
}
}
printf(" ]");
done:
printf("\n\n");
return;
}
void print_usage_common(struct command_name *cname, struct command *cmd)
{
int oo, opt_enum, first = 1;
printf(" Common options:");
/*
* when there's more than one variant, options that
* are common to all commands with a common name.
*/
if (cname->variants < 2)
goto all;
for (opt_enum = 0; opt_enum < ARG_COUNT; opt_enum++) {
if (!cname->common_options[opt_enum])
continue;
if (is_lvm_all_opt(opt_enum))
continue;
if (first)
printf("\n\t[");
else
printf(",\n\t ");
first = 0;
for (oo = 0; oo < cmd->oo_count; oo++) {
if (cmd->optional_opt_args[oo].opt != opt_enum)
continue;
printf(" %s", opt_names[opt_enum].long_opt);
if (cmd->optional_opt_args[oo].def.val_bits) {
printf(" ");
print_usage_def(&cmd->optional_opt_args[oo].def);
}
break;
}
}
all:
/* options that are common to all lvm commands */
for (oo = 0; oo < lvm_all.oo_count; oo++) {
opt_enum = lvm_all.optional_opt_args[oo].opt;
if (first)
printf("\n\t[");
else
printf(",\n\t ");
first = 0;
printf(" %s", opt_names[opt_enum].long_opt);
if (lvm_all.optional_opt_args[oo].def.val_bits) {
printf(" ");
print_usage_def(&lvm_all.optional_opt_args[oo].def);
}
}
printf(" ]");
printf("\n\n");
}
#ifdef MAN_PAGE_GENERATOR
static void print_val_man(const char *str)
{
char *line;
char *line_argv[MAX_LINE_ARGC];
int line_argc;
int i;
if (!strcmp(str, "Number") ||
!strcmp(str, "String") ||
!strncmp(str, "VG", 2) ||
!strncmp(str, "LV", 2) ||
!strncmp(str, "PV", 2) ||
!strcmp(str, "Tag")) {
printf("\\fI%s\\fP", str);
return;
}
if (strstr(str, "Number[") || strstr(str, "]Number")) {
for (i = 0; i < strlen(str); i++) {
if (str[i] == 'N')
printf("\\fI");
if (str[i] == 'r') {
printf("%c", str[i]);
printf("\\fP");
continue;
}
printf("%c", str[i]);
}
return;
}
if (strstr(str, "|")) {
int len = strlen(str);
line = strdup(str);
split_line(line, &line_argc, line_argv, '|');
for (i = 0; i < line_argc; i++) {
if (i) {
printf("|");
/* this is a hack to add a line break for
a long string of opt values */
if ((len > 40) && (i >= (line_argc / 2) + 1)) {
printf("\n");
printf(" ");
len = 0;
}
}
if (strstr(line_argv[i], "Number"))
printf("\\fI%s\\fP", line_argv[i]);
else
printf("\\fB%s\\fP", line_argv[i]);
}
return;
}
printf("\\fB%s\\fP", str);
}
static void print_def_man(struct arg_def *def, int usage)
{
int val_enum;
int lvt_enum;
int sep = 0;
int i;
for (val_enum = 0; val_enum < VAL_COUNT; val_enum++) {
if (def->val_bits & val_enum_to_bit(val_enum)) {
if (val_enum == conststr_VAL) {
printf("\\fB");
printf("%s", def->str);
printf("\\fP");
}
else if (val_enum == constnum_VAL) {
printf("\\fB");
printf("%llu", (unsigned long long)def->num);
printf("\\fP");
}
else {
if (sep) printf("|");
if (!usage || !val_names[val_enum].usage) {
printf("\\fI");
printf("%s", val_names[val_enum].name);
printf("\\fP");
} else {
print_val_man(val_names[val_enum].usage);
}
sep = 1;
}
if (val_enum == lv_VAL && def->lvt_bits) {
printf("\\fI");
for (lvt_enum = 1; lvt_enum < LVT_COUNT; lvt_enum++) {
if (lvt_bit_is_set(def->lvt_bits, lvt_enum))
printf("_%s", lvt_enum_to_name(lvt_enum));
}
printf("\\fP");
}
if ((val_enum == vg_VAL) && (def->flags & ARG_DEF_FLAG_NEW_VG)) {
printf("\\fI");
printf("_new");
printf("\\fP");
}
if ((val_enum == lv_VAL) && (def->flags & ARG_DEF_FLAG_NEW_LV)) {
printf("\\fI");
printf("_new");
printf("\\fP");
}
}
}
if (def->flags & ARG_DEF_FLAG_MAY_REPEAT)
printf(" ...");
}
static char *man_long_opt_name(const char *cmdname, int opt_enum)
{
static char long_opt_name[64];
memset(&long_opt_name, 0, sizeof(long_opt_name));
switch (opt_enum) {
case syncaction_ARG:
strncpy(long_opt_name, "--[raid]syncaction", 63);
break;
case writemostly_ARG:
strncpy(long_opt_name, "--[raid]writemostly", 63);
break;
case minrecoveryrate_ARG:
strncpy(long_opt_name, "--[raid]minrecoveryrate", 63);
break;
case maxrecoveryrate_ARG:
strncpy(long_opt_name, "--[raid]maxrecoveryrate", 63);
break;
case writebehind_ARG:
strncpy(long_opt_name, "--[raid]writebehind", 63);
break;
case vgmetadatacopies_ARG:
if (!strncmp(cmdname, "vg", 2))
strncpy(long_opt_name, "--[vg]metadatacopies", 63);
else
strncpy(long_opt_name, "--vgmetadatacopies", 63);
break;
case pvmetadatacopies_ARG:
if (!strncmp(cmdname, "pv", 2))
strncpy(long_opt_name, "--[pv]metadatacopies", 63);
else
strncpy(long_opt_name, "--pvmetadatacopies", 63);
break;
default:
strncpy(long_opt_name, opt_names[opt_enum].long_opt, 63);
break;
}
return long_opt_name;
}
void print_man_usage(char *lvmname, struct command *cmd)
{
struct command_name *cname;
int onereq = (cmd->cmd_flags & CMD_FLAG_ONE_REQUIRED_OPT) ? 1 : 0;
int i, sep, ro, rp, oo, op, opt_enum;
int need_ro_indent_end = 0;
if (!(cname = find_command_name(cmd->name)))
return;
printf("\\fB%s\\fP", lvmname);
if (!onereq)
goto ro_normal;
/*
* one required option in a set, print as:
* ( -a|--a,
* -b|--b,
* --c,
* --d )
*
* First loop through ro prints those with short opts,
* and the second loop prints those without short opts.
*/
if (cmd->ro_count) {
printf("\n");
printf(".RS 4\n");
printf("(");
sep = 0;
/* print required options with a short opt */
for (ro = 0; ro < cmd->ro_count; ro++) {
opt_enum = cmd->required_opt_args[ro].opt;
if (!opt_names[opt_enum].short_opt)
continue;
if (sep) {
printf(",");
printf("\n.br\n");
printf(" ");
}
if (opt_names[opt_enum].short_opt) {
printf(" \\fB-%c\\fP|\\fB%s\\fP",
opt_names[opt_enum].short_opt,
man_long_opt_name(cmd->name, opt_enum));
} else {
printf(" ");
printf(" \\fB%s\\fP", man_long_opt_name(cmd->name, opt_enum));
}
if (cmd->required_opt_args[ro].def.val_bits) {
printf(" ");
print_def_man(&cmd->required_opt_args[ro].def, 1);
}
sep++;
}
/* print required options without a short opt */
for (ro = 0; ro < cmd->ro_count; ro++) {
opt_enum = cmd->required_opt_args[ro].opt;
if (opt_names[opt_enum].short_opt)
continue;
if (sep) {
printf(",");
printf("\n.br\n");
printf(" ");
}
printf(" ");
printf(" \\fB%s\\fP", man_long_opt_name(cmd->name, opt_enum));
if (cmd->required_opt_args[ro].def.val_bits) {
printf(" ");
print_def_man(&cmd->required_opt_args[ro].def, 1);
}
sep++;
}
printf(" )\n");
printf(".RE\n");
}
/* print required position args on a new line after the onereq set */
if (cmd->rp_count) {
printf(".RS 4\n");
for (rp = 0; rp < cmd->rp_count; rp++) {
if (cmd->required_pos_args[rp].def.val_bits) {
printf(" ");
print_def_man(&cmd->required_pos_args[rp].def, 1);
}
}
printf("\n");
printf(".RE\n");
} else {
/* printf("\n"); */
}
printf(".br\n");
goto oo_count;
ro_normal:
/*
* all are required options, print as:
* -a|--aaa <val> -b|--bbb <val>
*/
if (cmd->ro_count) {
sep = 0;
for (ro = 0; ro < cmd->ro_count; ro++) {
/* avoid long line wrapping */
if ((cmd->ro_count > 2) && (sep == 2)) {
printf("\n.RS 5\n");
need_ro_indent_end = 1;
}
opt_enum = cmd->required_opt_args[ro].opt;
if (opt_names[opt_enum].short_opt) {
printf(" \\fB-%c\\fP|\\fB%s\\fP",
opt_names[opt_enum].short_opt,
man_long_opt_name(cmd->name, opt_enum));
} else {
printf(" \\fB%s\\fP", opt_names[cmd->required_opt_args[ro].opt].long_opt);
}
if (cmd->required_opt_args[ro].def.val_bits) {
printf(" ");
print_def_man(&cmd->required_opt_args[ro].def, 1);
}
sep++;
}
}
/* print required position args on the same line as the required options */
if (cmd->rp_count) {
for (rp = 0; rp < cmd->rp_count; rp++) {
if (cmd->required_pos_args[rp].def.val_bits) {
printf(" ");
print_def_man(&cmd->required_pos_args[rp].def, 1);
}
}
printf("\n");
} else {
printf("\n");
}
if (need_ro_indent_end)
printf(".RE\n");
printf(".br\n");
oo_count:
if (!cmd->oo_count)
goto op_count;
sep = 0;
if (cmd->oo_count) {
printf(".RS 4\n");
printf("[");
/* print optional options with short opts */
for (oo = 0; oo < cmd->oo_count; oo++) {
opt_enum = cmd->optional_opt_args[oo].opt;
if (!opt_names[opt_enum].short_opt)
continue;
if (is_lvm_all_opt(opt_enum))
continue;
if ((cname->variants > 1) && cname->common_options[opt_enum])
continue;
if (sep) {
printf(",");
printf("\n.br\n");
printf(" ");
}
printf(" \\fB-%c\\fP|\\fB%s\\fP",
opt_names[opt_enum].short_opt,
man_long_opt_name(cmd->name, opt_enum));
if (cmd->optional_opt_args[oo].def.val_bits) {
printf(" ");
print_def_man(&cmd->optional_opt_args[oo].def, 1);
}
sep = 1;
}
/* print optional options without short opts */
for (oo = 0; oo < cmd->oo_count; oo++) {
opt_enum = cmd->optional_opt_args[oo].opt;
if (opt_names[opt_enum].short_opt)
continue;
if (is_lvm_all_opt(opt_enum))
continue;
if ((cname->variants > 1) && cname->common_options[opt_enum])
continue;
if (sep) {
printf(",");
printf("\n.br\n");
printf(" ");
}
/* space alignment without short opt */
printf(" ");
printf(" \\fB%s\\fP", man_long_opt_name(cmd->name, opt_enum));
if (cmd->optional_opt_args[oo].def.val_bits) {
printf(" ");
print_def_man(&cmd->optional_opt_args[oo].def, 1);
}
sep = 1;
}
if (sep) {
printf(",");
printf("\n.br\n");
printf(" ");
/* space alignment without short opt */
printf(" ");
}
printf(" COMMON_OPTIONS");
printf(" ]\n");
printf(".RE\n");
printf(".br\n");
}
op_count:
if (!cmd->op_count)
goto done;
printf(".RS 4\n");
printf("[");
if (cmd->op_count) {
for (op = 0; op < cmd->op_count; op++) {
if (cmd->optional_pos_args[op].def.val_bits) {
printf(" ");
print_def_man(&cmd->optional_pos_args[op].def, 1);
}
}
}
printf(" ]\n");
printf(".RE\n");
done:
printf("\n");
}
/*
* common options listed in the usage section.
*
* For commands with only one variant, this is only
* the options which are common to all lvm commands
* (in lvm_all, see is_lvm_all_opt).
*
* For commands with more than one variant, this
* is the set of options common to all variants
* (in cname->common_options), (which obviously
* includes the options common to all lvm commands.)
*
* List ordering:
* options with short+long names, alphabetically,
* then options with only long names, alphabetically
*/
void print_man_usage_common(struct command *cmd)
{
struct command_name *cname;
int i, sep, ro, rp, oo, op, opt_enum;
if (!(cname = find_command_name(cmd->name)))
return;
sep = 0;
printf(".RS 4\n");
printf("[");
/* print those with short opts */
for (i = 0; i < ARG_COUNT; i++) {
opt_enum = opt_names_alpha[i]->opt_enum;
if (!cname->common_options[opt_enum])
continue;
if (!opt_names[opt_enum].short_opt)
continue;
if ((cname->variants < 2) && !is_lvm_all_opt(opt_enum))
continue;
if (sep) {
printf(",");
printf("\n.br\n");
printf(" ");
}
for (oo = 0; oo < cmd->oo_count; oo++) {
if (cmd->optional_opt_args[oo].opt != opt_enum)
continue;
printf(" \\fB-%c\\fP|\\fB%s\\fP",
opt_names[opt_enum].short_opt,
man_long_opt_name(cmd->name, opt_enum));
if (cmd->optional_opt_args[oo].def.val_bits) {
printf(" ");
print_def_man(&cmd->optional_opt_args[oo].def, 1);
}
sep = 1;
break;
}
}
/* print those without short opts */
for (i = 0; i < ARG_COUNT; i++) {
opt_enum = opt_names_alpha[i]->opt_enum;
if (!cname->common_options[opt_enum])
continue;
if (opt_names[opt_enum].short_opt)
continue;
if ((cname->variants < 2) && !is_lvm_all_opt(opt_enum))
continue;
if (sep) {
printf(",");
printf("\n.br\n");
printf(" ");
}
for (oo = 0; oo < cmd->oo_count; oo++) {
if (cmd->optional_opt_args[oo].opt != opt_enum)
continue;
/* space alignment without short opt */
printf(" ");
printf(" \\fB%s\\fP", man_long_opt_name(cmd->name, opt_enum));
if (cmd->optional_opt_args[oo].def.val_bits) {
printf(" ");
print_def_man(&cmd->optional_opt_args[oo].def, 1);
}
sep = 1;
break;
}
}
printf(" ]\n");
return;
}
/*
* Format of description, when different command names have
* different descriptions:
*
* "#cmdname1"
* "text foo goes here"
* "a second line of text."
* "#cmdname2"
* "text bar goes here"
* "another line of text."
*
* When called for cmdname2, this function should just print:
*
* "text bar goes here"
* "another line of text."
*/
static void print_man_option_desc(struct command_name *cname, int opt_enum)
{
const char *desc = opt_names[opt_enum].desc;
char buf[DESC_LINE];
int started_cname = 0;
int line_count = 0;
int di, bi = 0;
if (desc[0] != '#') {
printf("%s", desc);
return;
}
for (di = 0; di < strlen(desc); di++) {
buf[bi++] = desc[di];
if (bi == DESC_LINE) {
log_error("Parsing command defs: print_man_option_desc line too long");
exit(EXIT_FAILURE);
}
if (buf[bi-1] != '\n')
continue;
if (buf[0] != '#') {
if (started_cname) {
printf("%s", buf);
line_count++;
}
memset(buf, 0, sizeof(buf));
bi = 0;
continue;
}
/* Line starting with #cmdname */
/*
* Must be starting a new command name.
* If no lines have been printed, multiple command names
* are using the same text. If lines have been printed,
* then the start of a new command name means the end
* of text for the current command name.
*/
if (line_count && started_cname)
return;
if (!strncmp(buf + 1, cname->name, strlen(cname->name))) {
/* The start of our command name. */
started_cname = 1;
memset(buf, 0, sizeof(buf));
bi = 0;
} else {
/* The start of another command name. */
memset(buf, 0, sizeof(buf));
bi = 0;
}
}
if (bi && started_cname)
printf("%s", buf);
}
/*
* Print a list of all options names for a given
* command name, listed by:
* options with short+long names, alphabetically,
* then options with only long names, alphabetically
*/
void print_man_all_options_list(struct command_name *cname)
{
int opt_enum, val_enum;
int sep = 0;
int i;
/* print those with both short and long opts */
for (i = 0; i < ARG_COUNT; i++) {
opt_enum = opt_names_alpha[i]->opt_enum;
if (!cname->all_options[opt_enum])
continue;
if (!opt_names[opt_enum].short_opt)
continue;
if (sep)
printf("\n.br\n");
printf(" \\fB-%c\\fP|\\fB%s\\fP",
opt_names[opt_enum].short_opt,
man_long_opt_name(cname->name, opt_enum));
val_enum = opt_names[opt_enum].val_enum;
if (!val_names[val_enum].fn) {
/* takes no arg */
} else if (!val_names[val_enum].usage) {
printf(" ");
printf("\\fI");
printf("%s", val_names[val_enum].name);
printf("\\fP");
} else {
printf(" ");
print_val_man(val_names[val_enum].usage);
}
sep = 1;
}
/* print those without short opts */
for (i = 0; i < ARG_COUNT; i++) {
opt_enum = opt_names_alpha[i]->opt_enum;
if (!cname->all_options[opt_enum])
continue;
if (opt_names[opt_enum].short_opt)
continue;
if (sep)
printf("\n.br\n");
/* space alignment without short opt */
printf(" ");
printf(" \\fB%s\\fP", man_long_opt_name(cname->name, opt_enum));
val_enum = opt_names[opt_enum].val_enum;
if (!val_names[val_enum].fn) {
/* takes no arg */
} else if (!val_names[val_enum].usage) {
printf(" ");
printf("\\fI");
printf("%s", val_names[val_enum].name);
printf("\\fP");
} else {
printf(" ");
print_val_man(val_names[val_enum].usage);
}
sep = 1;
}
}
/*
* All options used for a given command name, along with descriptions.
* listed in order of:
* 1. options that are not common to all lvm commands, alphabetically
* 2. options common to all lvm commands, alphabetically
*/
void print_man_all_options_desc(struct command_name *cname)
{
int opt_enum, val_enum;
int print_common = 0;
int sep = 0;
int i;
again:
/*
* Loop 1: print options that are not common to all lvm commands.
* Loop 2: print options common to all lvm commands (lvm_all)
*/
for (i = 0; i < ARG_COUNT; i++) {
opt_enum = opt_names_alpha[i]->opt_enum;
if (!cname->all_options[opt_enum])
continue;
if (!print_common && is_lvm_all_opt(opt_enum))
continue;
if (print_common && !is_lvm_all_opt(opt_enum))
continue;
printf("\n.TP\n");
if (opt_names[opt_enum].short_opt) {
printf("\\fB-%c\\fP|\\fB%s\\fP",
opt_names[opt_enum].short_opt,
man_long_opt_name(cname->name, opt_enum));
} else {
printf("\\fB%s\\fP", man_long_opt_name(cname->name, opt_enum));
}
val_enum = opt_names[opt_enum].val_enum;
if (!val_names[val_enum].fn) {
/* takes no arg */
} else if (!val_names[val_enum].usage) {
printf(" ");
printf("\\fI");
printf("%s", val_names[val_enum].name);
printf("\\fP");
} else {
printf(" ");
print_val_man(val_names[val_enum].usage);
}
if (opt_names[opt_enum].desc) {
printf("\n");
printf(".br\n");
print_man_option_desc(cname, opt_enum);
}
sep = 1;
}
if (!print_common) {
print_common = 1;
goto again;
}
}
void print_desc_man(const char *desc)
{
char buf[DESC_LINE] = {0};
int di = 0;
int bi = 0;
for (di = 0; di < strlen(desc); di++) {
if (desc[di] == '\0')
break;
if (desc[di] == '\n')
continue;
if (!strncmp(&desc[di], "DESC:", 5)) {
if (bi) {
printf("%s\n", buf);
printf(".br\n");
memset(buf, 0, sizeof(buf));
bi = 0;
}
di += 5;
continue;
}
if (!bi && desc[di] == ' ')
continue;
buf[bi++] = desc[di];
if (bi == (DESC_LINE - 1))
break;
}
if (bi) {
printf("%s\n", buf);
printf(".br\n");
}
}
static char *upper_command_name(char *str)
{
static char str_upper[32];
int i = 0;
while (*str) {
str_upper[i++] = toupper(*str);
str++;
}
str_upper[i] = '\0';
return str_upper;
}
#define MAX_MAN_DESC (1024 * 1024)
static void include_description_file(char *name, char *des_file)
{
char buf[MAX_MAN_DESC];
int fd;
memset(buf, 0, sizeof(buf));
fd = open(des_file, O_RDONLY);
if (fd < 0)
return;
read(fd, buf, sizeof(buf));
buf[MAX_MAN_DESC-1] = '\0';
printf(".SH DESCRIPTION\n");
printf("%s\n", buf);
close(fd);
}
void print_man(char *name, char *des_file, int include_primary, int include_secondary)
{
struct command_name *cname;
struct command *cmd, *prev_cmd = NULL;
char *lvmname = name;
const char *desc;
int i, j, ro, rp, oo, op;
if (!strncmp(name, "lvm-", 4))
name += 4;
cname = find_command_name(name);
printf(".TH %s 8 \"LVM TOOLS #VERSION#\" \"Sistina Software UK\"\n",
upper_command_name(lvmname));
for (i = 0; i < COMMAND_COUNT; i++) {
cmd = &commands[i];
if (prev_cmd && strcmp(prev_cmd->name, cmd->name)) {
printf("Common options:\n");
printf(".\n");
print_man_usage_common(prev_cmd);
printf("\n");
printf(".SH OPTIONS\n");
printf(".br\n");
print_man_all_options_desc(cname);
prev_cmd = NULL;
}
if ((cmd->cmd_flags & CMD_FLAG_SECONDARY_SYNTAX) && !include_secondary)
continue;
if (!(cmd->cmd_flags & CMD_FLAG_SECONDARY_SYNTAX) && !include_primary)
continue;
if (strcmp(name, cmd->name))
continue;
if (!prev_cmd || strcmp(prev_cmd->name, cmd->name)) {
printf(".SH NAME\n");
printf(".\n");
if (cname->desc)
printf("%s \\- %s\n", lvmname, cname->desc);
else
printf("%s\n", lvmname);
printf(".P\n");
printf(".\n");
printf(".SH SYNOPSIS\n");
printf(".br\n");
printf(".P\n");
printf(".\n");
prev_cmd = cmd;
if (!(cname = find_command_name(cmd->name)))
return;
if (cname->variant_has_ro && cname->variant_has_rp)
printf("\\fB%s\\fP \\fIrequired_option_args\\fP \\fIrequired_position_args\\fP\n", lvmname);
else if (cname->variant_has_ro && !cname->variant_has_rp)
printf("\\fB%s\\fP \\fIrequired_option_args\\fP\n", lvmname);
else if (!cname->variant_has_ro && cname->variant_has_rp)
printf("\\fB%s\\fP \\fIrequired_position_args\\fP\n", lvmname);
else if (!cname->variant_has_ro && !cname->variant_has_rp)
printf("\\fB%s\\fP\n", lvmname);
printf(".br\n");
if (cname->variant_has_oo) {
printf(" [ \\fIoptional_option_args\\fP ]\n");
printf(".br\n");
}
if (cname->variant_has_op) {
printf(" [ \\fIoptional_position_args\\fP ]\n");
printf(".br\n");
}
printf(".P\n");
printf("\n");
/* listing them all when there's only 1 or 2 is just repetative */
if (cname->variants > 2) {
printf(".P\n");
print_man_all_options_list(cname);
printf("\n");
printf(".P\n");
printf("\n");
}
if (des_file) {
include_description_file(lvmname, des_file);
printf(".P\n");
}
printf(".SH USAGE\n");
printf(".br\n");
printf(".P\n");
printf(".\n");
}
if (cmd->desc) {
print_desc_man(cmd->desc);
printf(".P\n");
}
print_man_usage(lvmname, cmd);
if (i == (COMMAND_COUNT - 1)) {
printf("Common options:\n");
printf(".\n");
print_man_usage_common(cmd);
printf("\n");
printf(".SH OPTIONS\n");
printf(".br\n");
print_man_all_options_desc(cname);
}
printf("\n");
continue;
}
}
int main(int argc, char *argv[])
{
memset(&commands, 0, sizeof(commands));
if (argc < 2) {
log_error("Usage: %s <command> [/path/to/description-file]", argv[0]);
exit(EXIT_FAILURE);
}
define_commands(NULL);
print_man(argv[1], (argc > 2) ? argv[2] : NULL, 1, 1);
return 0;
}
#endif
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