463 lines
9.5 KiB
C
463 lines
9.5 KiB
C
/* arg.c - argument parser */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2003,2004,2005,2007,2008 Free Software Foundation, Inc.
|
|
*
|
|
* GRUB is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* GRUB is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <grub/misc.h>
|
|
#include <grub/mm.h>
|
|
#include <grub/err.h>
|
|
#include <grub/term.h>
|
|
#include <grub/extcmd.h>
|
|
#include <grub/i18n.h>
|
|
|
|
/* Built-in parser for default options. */
|
|
static const struct grub_arg_option help_options[] =
|
|
{
|
|
{"help", 0, 0,
|
|
N_("Display this help and exit."), 0, ARG_TYPE_NONE},
|
|
{"usage", 0, 0,
|
|
N_("Display the usage of this command and exit."), 0, ARG_TYPE_NONE},
|
|
{0, 0, 0, 0, 0, 0}
|
|
};
|
|
|
|
/* Helper for find_short. */
|
|
static const struct grub_arg_option *
|
|
fnd_short (const struct grub_arg_option *opt, char c)
|
|
{
|
|
while (opt->doc)
|
|
{
|
|
if (opt->shortarg == c)
|
|
return opt;
|
|
opt++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct grub_arg_option *
|
|
find_short (const struct grub_arg_option *options, char c)
|
|
{
|
|
const struct grub_arg_option *found = 0;
|
|
|
|
if (options)
|
|
found = fnd_short (options, c);
|
|
|
|
if (! found)
|
|
{
|
|
switch (c)
|
|
{
|
|
case 'h':
|
|
found = help_options;
|
|
break;
|
|
|
|
case 'u':
|
|
found = (help_options + 1);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return found;
|
|
}
|
|
|
|
/* Helper for find_long. */
|
|
static const struct grub_arg_option *
|
|
fnd_long (const struct grub_arg_option *opt, const char *s, int len)
|
|
{
|
|
while (opt->doc)
|
|
{
|
|
if (opt->longarg && ! grub_strncmp (opt->longarg, s, len) &&
|
|
opt->longarg[len] == '\0')
|
|
return opt;
|
|
opt++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct grub_arg_option *
|
|
find_long (const struct grub_arg_option *options, const char *s, int len)
|
|
{
|
|
const struct grub_arg_option *found = 0;
|
|
|
|
if (options)
|
|
found = fnd_long (options, s, len);
|
|
|
|
if (! found)
|
|
found = fnd_long (help_options, s, len);
|
|
|
|
return found;
|
|
}
|
|
|
|
static void
|
|
show_usage (grub_extcmd_t cmd)
|
|
{
|
|
grub_printf ("%s %s %s\n", _("Usage:"), cmd->cmd->name, _(cmd->cmd->summary));
|
|
}
|
|
|
|
static void
|
|
showargs (const struct grub_arg_option *opt,
|
|
int h_is_used, int u_is_used)
|
|
{
|
|
for (; opt->doc; opt++)
|
|
{
|
|
int spacing = 20;
|
|
|
|
if (opt->shortarg && grub_isgraph (opt->shortarg))
|
|
grub_printf ("-%c%c ", opt->shortarg, opt->longarg ? ',':' ');
|
|
else if (opt == help_options && ! h_is_used)
|
|
grub_printf ("-h, ");
|
|
else if (opt == help_options + 1 && ! u_is_used)
|
|
grub_printf ("-u, ");
|
|
else
|
|
grub_printf (" ");
|
|
|
|
if (opt->longarg)
|
|
{
|
|
grub_printf ("--%s", opt->longarg);
|
|
spacing -= grub_strlen (opt->longarg) + 2;
|
|
|
|
if (opt->arg)
|
|
{
|
|
grub_printf ("=%s", opt->arg);
|
|
spacing -= grub_strlen (opt->arg) + 1;
|
|
}
|
|
}
|
|
|
|
if (spacing <= 0)
|
|
spacing = 3;
|
|
|
|
while (spacing--)
|
|
grub_xputs (" ");
|
|
|
|
grub_printf ("%s\n", _(opt->doc));
|
|
}
|
|
}
|
|
|
|
void
|
|
grub_arg_show_help (grub_extcmd_t cmd)
|
|
{
|
|
int h_is_used = 0;
|
|
int u_is_used = 0;
|
|
const struct grub_arg_option *opt;
|
|
|
|
show_usage (cmd);
|
|
grub_printf ("%s\n\n", _(cmd->cmd->description));
|
|
|
|
for (opt = cmd->options; opt && opt->doc; opt++)
|
|
switch (opt->shortarg)
|
|
{
|
|
case 'h':
|
|
h_is_used = 1;
|
|
break;
|
|
|
|
case 'u':
|
|
u_is_used = 1;
|
|
break;
|
|
}
|
|
|
|
if (cmd->options)
|
|
showargs (cmd->options, h_is_used, u_is_used);
|
|
showargs (help_options, h_is_used, u_is_used);
|
|
#if 0
|
|
grub_printf ("\nReport bugs to <%s>.\n", PACKAGE_BUGREPORT);
|
|
#endif
|
|
}
|
|
|
|
|
|
static int
|
|
parse_option (grub_extcmd_t cmd, const struct grub_arg_option *opt,
|
|
char *arg, struct grub_arg_list *usr)
|
|
{
|
|
if (opt == help_options)
|
|
{
|
|
grub_arg_show_help (cmd);
|
|
return -1;
|
|
}
|
|
|
|
if (opt == help_options + 1)
|
|
{
|
|
show_usage (cmd);
|
|
return -1;
|
|
}
|
|
{
|
|
int found = opt - cmd->options;
|
|
|
|
if (opt->flags & GRUB_ARG_OPTION_REPEATABLE)
|
|
{
|
|
usr[found].args[usr[found].set++] = arg;
|
|
usr[found].args[usr[found].set] = NULL;
|
|
}
|
|
else
|
|
{
|
|
usr[found].set = 1;
|
|
usr[found].arg = arg;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline grub_err_t
|
|
add_arg (char ***argl, int *num, char *s)
|
|
{
|
|
char **p = *argl;
|
|
*argl = grub_realloc (*argl, (++(*num) + 1) * sizeof (char *));
|
|
if (! *argl)
|
|
{
|
|
grub_free (p);
|
|
return grub_errno;
|
|
}
|
|
(*argl)[(*num) - 1] = s;
|
|
(*argl)[(*num)] = NULL;
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
grub_arg_parse (grub_extcmd_t cmd, int argc, char **argv,
|
|
struct grub_arg_list *usr, char ***args, int *argnum)
|
|
{
|
|
int curarg;
|
|
int arglen;
|
|
char **argl = 0;
|
|
int num = 0;
|
|
|
|
for (curarg = 0; curarg < argc; curarg++)
|
|
{
|
|
char *arg = argv[curarg];
|
|
const struct grub_arg_option *opt;
|
|
char *option = 0;
|
|
|
|
/* No option is used. */
|
|
if ((num && (cmd->cmd->flags & GRUB_COMMAND_OPTIONS_AT_START))
|
|
|| arg[0] != '-' || grub_strlen (arg) == 1)
|
|
{
|
|
if (add_arg (&argl, &num, arg) != 0)
|
|
goto fail;
|
|
|
|
continue;
|
|
}
|
|
|
|
/* One or more short options. */
|
|
if (arg[1] != '-')
|
|
{
|
|
char *curshort;
|
|
|
|
if (cmd->cmd->flags & GRUB_COMMAND_ACCEPT_DASH)
|
|
{
|
|
for (curshort = arg + 1; *curshort; curshort++)
|
|
if (!find_short (cmd->options, *curshort))
|
|
break;
|
|
|
|
if (*curshort)
|
|
{
|
|
if (add_arg (&argl, &num, arg) != 0)
|
|
goto fail;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
curshort = arg + 1;
|
|
|
|
while (1)
|
|
{
|
|
opt = find_short (cmd->options, *curshort);
|
|
|
|
if (! opt)
|
|
{
|
|
char tmp[3] = { '-', *curshort, 0 };
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT,
|
|
N_("unknown argument `%s'"), tmp);
|
|
goto fail;
|
|
}
|
|
|
|
curshort++;
|
|
|
|
/* Parse all arguments here except the last one because
|
|
it can have an argument value. */
|
|
if (*curshort)
|
|
{
|
|
if (parse_option (cmd, opt, 0, usr) || grub_errno)
|
|
goto fail;
|
|
}
|
|
else
|
|
{
|
|
if (opt->type != ARG_TYPE_NONE)
|
|
{
|
|
if (curarg + 1 < argc)
|
|
{
|
|
char *nextarg = argv[curarg + 1];
|
|
if (!(opt->flags & GRUB_ARG_OPTION_OPTIONAL)
|
|
|| (grub_strlen (nextarg) < 2 || nextarg[0] != '-'))
|
|
option = argv[++curarg];
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
}
|
|
else /* The argument starts with "--". */
|
|
{
|
|
/* If the argument "--" is used just pass the other
|
|
arguments. */
|
|
if (grub_strlen (arg) == 2)
|
|
{
|
|
for (curarg++; curarg < argc; curarg++)
|
|
if (add_arg (&argl, &num, argv[curarg]) != 0)
|
|
goto fail;
|
|
break;
|
|
}
|
|
|
|
option = grub_strchr (arg, '=');
|
|
if (option)
|
|
{
|
|
arglen = option - arg - 2;
|
|
option++;
|
|
}
|
|
else
|
|
arglen = grub_strlen (arg) - 2;
|
|
|
|
opt = find_long (cmd->options, arg + 2, arglen);
|
|
|
|
if (!option && argv[curarg + 1] && argv[curarg + 1][0] != '-'
|
|
&& opt && opt->type != ARG_TYPE_NONE)
|
|
option = argv[++curarg];
|
|
|
|
if (!opt && (cmd->cmd->flags & GRUB_COMMAND_ACCEPT_DASH))
|
|
{
|
|
if (add_arg (&argl, &num, arg) != 0)
|
|
goto fail;
|
|
continue;
|
|
}
|
|
|
|
if (! opt)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT, N_("unknown argument `%s'"), arg);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (! (opt->type == ARG_TYPE_NONE
|
|
|| (! option && (opt->flags & GRUB_ARG_OPTION_OPTIONAL))))
|
|
{
|
|
if (! option)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT,
|
|
N_("missing mandatory option for `%s'"), opt->longarg);
|
|
goto fail;
|
|
}
|
|
|
|
switch (opt->type)
|
|
{
|
|
case ARG_TYPE_NONE:
|
|
/* This will never happen. */
|
|
break;
|
|
|
|
case ARG_TYPE_STRING:
|
|
/* No need to do anything. */
|
|
break;
|
|
|
|
case ARG_TYPE_INT:
|
|
{
|
|
char *tail;
|
|
|
|
grub_strtoull (option, &tail, 0);
|
|
if (tail == 0 || tail == option || *tail != '\0' || grub_errno)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT,
|
|
N_("the argument `%s' requires an integer"),
|
|
arg);
|
|
|
|
goto fail;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case ARG_TYPE_DEVICE:
|
|
case ARG_TYPE_DIR:
|
|
case ARG_TYPE_FILE:
|
|
case ARG_TYPE_PATHNAME:
|
|
/* XXX: Not implemented. */
|
|
break;
|
|
}
|
|
if (parse_option (cmd, opt, option, usr) || grub_errno)
|
|
goto fail;
|
|
}
|
|
else
|
|
{
|
|
if (option)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT,
|
|
N_("a value was assigned to the argument `%s' while it "
|
|
"doesn't require an argument"), arg);
|
|
goto fail;
|
|
}
|
|
|
|
if (parse_option (cmd, opt, 0, usr) || grub_errno)
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
*args = argl;
|
|
*argnum = num;
|
|
return 1;
|
|
|
|
fail:
|
|
return 0;
|
|
}
|
|
|
|
struct grub_arg_list*
|
|
grub_arg_list_alloc(grub_extcmd_t extcmd, int argc,
|
|
char **argv __attribute__((unused)))
|
|
{
|
|
int i;
|
|
char **args;
|
|
grub_size_t argcnt;
|
|
struct grub_arg_list *list;
|
|
const struct grub_arg_option *options;
|
|
|
|
options = extcmd->options;
|
|
if (! options)
|
|
return 0;
|
|
|
|
argcnt = 0;
|
|
for (i = 0; options[i].doc; i++)
|
|
{
|
|
if (options[i].flags & GRUB_ARG_OPTION_REPEATABLE)
|
|
argcnt += ((grub_size_t) argc + 1) / 2 + 1; /* max possible for any option */
|
|
}
|
|
|
|
list = grub_zalloc (sizeof (*list) * i + sizeof (char*) * argcnt);
|
|
if (! list)
|
|
return 0;
|
|
|
|
args = (char**) (list + i);
|
|
for (i = 0; options[i].doc; i++)
|
|
{
|
|
list[i].set = 0;
|
|
list[i].arg = 0;
|
|
|
|
if (options[i].flags & GRUB_ARG_OPTION_REPEATABLE)
|
|
{
|
|
list[i].args = args;
|
|
args += (grub_size_t) argc / 2 + 1;
|
|
}
|
|
}
|
|
return list;
|
|
}
|