cee01aa683
* normal/arg.c (grub_arg_show_help): Do not show the bug report address. * commands/help.c (grub_cmd_help): Do not print newlines after the last command in print_command_help.
356 lines
7.4 KiB
C
356 lines
7.4 KiB
C
/* arg.c - argument parser */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2003, 2004 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 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include "grub/arg.h"
|
|
#include "grub/misc.h"
|
|
#include "grub/mm.h"
|
|
#include "grub/err.h"
|
|
#include "grub/normal.h"
|
|
|
|
/* Build in parser for default options. */
|
|
static const struct grub_arg_option help_options[] =
|
|
{
|
|
{"help", 'h', 0, "Display help", 0, ARG_TYPE_NONE},
|
|
{"usage", 'u', 0, "Show how to use this command", 0, ARG_TYPE_NONE},
|
|
{0, 0, 0, 0, 0, 0}
|
|
};
|
|
|
|
static struct grub_arg_option *
|
|
find_short (const struct grub_arg_option *options, char c)
|
|
{
|
|
struct grub_arg_option *found = 0;
|
|
auto struct grub_arg_option *fnd_short (const struct grub_arg_option *opt);
|
|
|
|
struct grub_arg_option *fnd_short (const struct grub_arg_option *opt)
|
|
{
|
|
while (opt->doc)
|
|
{
|
|
if (opt->shortarg == c)
|
|
return (struct grub_arg_option *) opt;
|
|
opt++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (options)
|
|
found = fnd_short (options);
|
|
if (! found)
|
|
found = fnd_short (help_options);
|
|
|
|
return found;
|
|
}
|
|
|
|
static char *
|
|
find_long_option (char *s)
|
|
{
|
|
char *argpos = grub_strchr (s, '=');
|
|
|
|
if (argpos)
|
|
{
|
|
*argpos = '\0';
|
|
return ++argpos;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct grub_arg_option *
|
|
find_long (const struct grub_arg_option *options, char *s)
|
|
{
|
|
struct grub_arg_option *found = 0;
|
|
auto struct grub_arg_option *fnd_long (const struct grub_arg_option *opt);
|
|
|
|
struct grub_arg_option *fnd_long (const struct grub_arg_option *opt)
|
|
{
|
|
while (opt->doc)
|
|
{
|
|
if (opt->longarg && !grub_strcmp (opt->longarg, s))
|
|
return (struct grub_arg_option *) opt;
|
|
opt++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (options)
|
|
found = fnd_long (options);
|
|
if (!found)
|
|
found = fnd_long (help_options);
|
|
|
|
return found;
|
|
}
|
|
|
|
static void
|
|
show_usage (grub_command_t cmd)
|
|
{
|
|
grub_printf ("Usage: %s\n", cmd->summary);
|
|
}
|
|
|
|
void
|
|
grub_arg_show_help (grub_command_t cmd)
|
|
{
|
|
static void showargs (const struct grub_arg_option *opt)
|
|
{
|
|
for (; opt->doc; opt++)
|
|
{
|
|
if (opt->shortarg && grub_isgraph (opt->shortarg))
|
|
grub_printf ("-%c%c ", opt->shortarg, opt->longarg ? ',':' ');
|
|
else
|
|
grub_printf (" ");
|
|
if (opt->longarg)
|
|
{
|
|
grub_printf ("--%s", opt->longarg);
|
|
if (opt->arg)
|
|
grub_printf ("=%s", opt->arg);
|
|
}
|
|
else
|
|
grub_printf ("\t");
|
|
|
|
grub_printf ("\t\t%s\n", opt->doc);
|
|
}
|
|
}
|
|
|
|
show_usage (cmd);
|
|
grub_printf ("%s\n\n", cmd->description);
|
|
if (cmd->options)
|
|
showargs (cmd->options);
|
|
showargs (help_options);
|
|
#if 0
|
|
grub_printf ("\nReport bugs to <%s>.\n", PACKAGE_BUGREPORT);
|
|
#endif
|
|
}
|
|
|
|
|
|
static int
|
|
parse_option (grub_command_t cmd, int key, char *arg, struct grub_arg_list *usr)
|
|
{
|
|
switch (key)
|
|
{
|
|
case 'h':
|
|
grub_arg_show_help (cmd);
|
|
return -1;
|
|
|
|
case 'u':
|
|
show_usage (cmd);
|
|
return -1;
|
|
|
|
default:
|
|
{
|
|
int found = -1;
|
|
int i = 0;
|
|
const struct grub_arg_option *opt = cmd->options;
|
|
|
|
while (opt->doc)
|
|
{
|
|
if (opt->shortarg && key == opt->shortarg)
|
|
{
|
|
found = i;
|
|
break;
|
|
}
|
|
opt++;
|
|
i++;
|
|
}
|
|
|
|
if (found == -1)
|
|
return -1;
|
|
|
|
usr[found].set = 1;
|
|
usr[found].arg = arg;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
grub_arg_parse (grub_command_t cmd, int argc, char **argv,
|
|
struct grub_arg_list *usr, char ***args, int *argnum)
|
|
{
|
|
int curarg;
|
|
char *longarg = 0;
|
|
int complete = 0;
|
|
char **argl = 0;
|
|
int num = 0;
|
|
auto grub_err_t add_arg (char *s);
|
|
|
|
grub_err_t add_arg (char *s)
|
|
{
|
|
argl = grub_realloc (argl, (++num) * sizeof (char *));
|
|
if (! argl)
|
|
return grub_errno;
|
|
argl[num - 1] = s;
|
|
return 0;
|
|
}
|
|
|
|
|
|
for (curarg = 0; curarg < argc; curarg++)
|
|
{
|
|
char *arg = argv[curarg];
|
|
struct grub_arg_option *opt;
|
|
char *option = 0;
|
|
|
|
/* No option is used. */
|
|
if (arg[0] != '-' || grub_strlen (arg) == 1)
|
|
{
|
|
if (add_arg (arg) != 0)
|
|
goto fail;
|
|
|
|
continue;
|
|
}
|
|
|
|
/* One or more short options. */
|
|
if (arg[1] != '-')
|
|
{
|
|
char *curshort = arg + 1;
|
|
|
|
while (1)
|
|
{
|
|
opt = find_short (cmd->options, *curshort);
|
|
if (!opt)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT,
|
|
"Unknown argument `-%c'\n", *curshort);
|
|
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->shortarg, 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 (arg) != 0)
|
|
goto fail;
|
|
break;
|
|
}
|
|
|
|
longarg = (char *) grub_strdup (arg);
|
|
if (! longarg)
|
|
goto fail;
|
|
|
|
option = find_long_option (longarg);
|
|
arg = longarg;
|
|
|
|
opt = find_long (cmd->options, arg + 2);
|
|
if (!opt)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT, "Unknown argument `%s'\n", arg);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (! (opt->type == ARG_TYPE_NONE
|
|
|| (!option && (opt->flags & GRUB_ARG_OPTION_OPTIONAL))))
|
|
{
|
|
if (!option)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT,
|
|
"Missing mandatory option for `%s'\n", 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_strtoul (option, &tail, 0);
|
|
if (tail == 0 || tail == option || *tail != '\0' || grub_errno)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT,
|
|
"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->shortarg, option, usr) || grub_errno)
|
|
goto fail;
|
|
}
|
|
else
|
|
{
|
|
if (option)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT,
|
|
"A value was assigned to the argument `%s' while it "
|
|
"doesn't require an argument\n", arg);
|
|
goto fail;
|
|
}
|
|
|
|
if (parse_option (cmd, opt->shortarg, 0, usr) || grub_errno)
|
|
goto fail;
|
|
}
|
|
grub_free (longarg);
|
|
longarg = 0;
|
|
}
|
|
|
|
complete = 1;
|
|
|
|
*args = argl;
|
|
*argnum = num;
|
|
|
|
fail:
|
|
grub_free (longarg);
|
|
|
|
return complete;
|
|
}
|