mirror of
https://git.proxmox.com/git/grub2
synced 2025-11-04 09:14:22 +00:00
528 lines
11 KiB
C
528 lines
11 KiB
C
/* completion.c - complete a command, a disk, a partition or a file */
|
||
/*
|
||
* GRUB -- GRand Unified Bootloader
|
||
* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2007,2008,2009 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/normal.h>
|
||
#include <grub/misc.h>
|
||
#include <grub/err.h>
|
||
#include <grub/mm.h>
|
||
#include <grub/partition.h>
|
||
#include <grub/disk.h>
|
||
#include <grub/file.h>
|
||
#include <grub/parser.h>
|
||
#include <grub/extcmd.h>
|
||
#include <grub/charset.h>
|
||
|
||
/* The current word. */
|
||
static const char *current_word;
|
||
|
||
/* The matched string. */
|
||
static char *match;
|
||
|
||
/* The count of candidates. */
|
||
static int num_found;
|
||
|
||
/* The string to be appended. */
|
||
static const char *suffix;
|
||
|
||
/* The callback function to print items. */
|
||
static void (*print_func) (const char *, grub_completion_type_t, int);
|
||
|
||
/* The state the command line is in. */
|
||
static grub_parser_state_t cmdline_state;
|
||
|
||
|
||
/* Add a string to the list of possible completions. COMPLETION is the
|
||
string that should be added. EXTRA will be appended if COMPLETION
|
||
matches uniquely. The type TYPE specifies what kind of data is added. */
|
||
static int
|
||
add_completion (const char *completion, const char *extra,
|
||
grub_completion_type_t type)
|
||
{
|
||
if (grub_strncmp (current_word, completion, grub_strlen (current_word)) == 0)
|
||
{
|
||
num_found++;
|
||
|
||
switch (num_found)
|
||
{
|
||
case 1:
|
||
match = grub_strdup (completion);
|
||
if (! match)
|
||
return 1;
|
||
suffix = extra;
|
||
break;
|
||
|
||
case 2:
|
||
if (print_func)
|
||
print_func (match, type, 0);
|
||
|
||
/* Fall through. */
|
||
|
||
default:
|
||
{
|
||
char *s = match;
|
||
const char *t = completion;
|
||
|
||
if (print_func)
|
||
print_func (completion, type, num_found - 1);
|
||
|
||
/* Detect the matched portion. */
|
||
while (*s && *t && *s == *t)
|
||
{
|
||
s++;
|
||
t++;
|
||
}
|
||
s = match + grub_getend (match, s);
|
||
|
||
*s = '\0';
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
iterate_partition (grub_disk_t disk, const grub_partition_t p,
|
||
void *data __attribute__ ((unused)))
|
||
{
|
||
const char *disk_name = disk->name;
|
||
char *name;
|
||
int ret;
|
||
char *part_name;
|
||
|
||
part_name = grub_partition_get_name (p);
|
||
if (! part_name)
|
||
return 1;
|
||
|
||
name = grub_xasprintf ("%s,%s", disk_name, part_name);
|
||
grub_free (part_name);
|
||
|
||
if (! name)
|
||
return 1;
|
||
|
||
ret = add_completion (name, ")", GRUB_COMPLETION_TYPE_PARTITION);
|
||
grub_free (name);
|
||
return ret;
|
||
}
|
||
|
||
static int
|
||
iterate_dir (const char *filename, const struct grub_dirhook_info *info,
|
||
void *data __attribute__ ((unused)))
|
||
{
|
||
if (! info->dir)
|
||
{
|
||
const char *prefix;
|
||
if (cmdline_state == GRUB_PARSER_STATE_DQUOTE)
|
||
prefix = "\" ";
|
||
else if (cmdline_state == GRUB_PARSER_STATE_QUOTE)
|
||
prefix = "\' ";
|
||
else
|
||
prefix = " ";
|
||
|
||
if (add_completion (filename, prefix, GRUB_COMPLETION_TYPE_FILE))
|
||
return 1;
|
||
}
|
||
else if (grub_strcmp (filename, ".") && grub_strcmp (filename, ".."))
|
||
{
|
||
char *fname;
|
||
|
||
fname = grub_xasprintf ("%s/", filename);
|
||
if (add_completion (fname, "", GRUB_COMPLETION_TYPE_FILE))
|
||
{
|
||
grub_free (fname);
|
||
return 1;
|
||
}
|
||
grub_free (fname);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
iterate_dev (const char *devname, void *data __attribute__ ((unused)))
|
||
{
|
||
grub_device_t dev;
|
||
|
||
/* Complete the partition part. */
|
||
dev = grub_device_open (devname);
|
||
|
||
if (!dev)
|
||
{
|
||
grub_errno = GRUB_ERR_NONE;
|
||
return 0;
|
||
}
|
||
|
||
if (grub_strcmp (devname, current_word) == 0)
|
||
{
|
||
if (add_completion (devname, ")", GRUB_COMPLETION_TYPE_PARTITION))
|
||
{
|
||
grub_device_close (dev);
|
||
return 1;
|
||
}
|
||
|
||
if (dev->disk)
|
||
if (grub_partition_iterate (dev->disk, iterate_partition, NULL))
|
||
{
|
||
grub_device_close (dev);
|
||
return 1;
|
||
}
|
||
}
|
||
else if (add_completion (devname, "", GRUB_COMPLETION_TYPE_DEVICE))
|
||
{
|
||
grub_device_close (dev);
|
||
return 1;
|
||
}
|
||
|
||
grub_device_close (dev);
|
||
grub_errno = GRUB_ERR_NONE;
|
||
return 0;
|
||
}
|
||
|
||
/* Complete a device. */
|
||
static int
|
||
complete_device (void)
|
||
{
|
||
/* Check if this is a device or a partition. */
|
||
char *p = grub_strchr (++current_word, ',');
|
||
grub_device_t dev;
|
||
|
||
if (! p)
|
||
{
|
||
/* Complete the disk part. */
|
||
if (grub_disk_dev_iterate (iterate_dev, NULL))
|
||
return 1;
|
||
}
|
||
else
|
||
{
|
||
/* Complete the partition part. */
|
||
*p = '\0';
|
||
dev = grub_device_open (current_word);
|
||
*p = ',';
|
||
grub_errno = GRUB_ERR_NONE;
|
||
|
||
if (dev)
|
||
{
|
||
if (dev->disk)
|
||
{
|
||
if (grub_partition_iterate (dev->disk, iterate_partition, NULL))
|
||
{
|
||
grub_device_close (dev);
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
grub_device_close (dev);
|
||
}
|
||
else
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Complete a file. */
|
||
static int
|
||
complete_file (void)
|
||
{
|
||
char *device;
|
||
char *dir;
|
||
char *last_dir;
|
||
grub_fs_t fs;
|
||
grub_device_t dev;
|
||
int ret = 0;
|
||
|
||
device = grub_file_get_device_name (current_word);
|
||
if (grub_errno != GRUB_ERR_NONE)
|
||
return 1;
|
||
|
||
dev = grub_device_open (device);
|
||
if (! dev)
|
||
{
|
||
ret = 1;
|
||
goto fail;
|
||
}
|
||
|
||
fs = grub_fs_probe (dev);
|
||
if (! fs)
|
||
{
|
||
ret = 1;
|
||
goto fail;
|
||
}
|
||
|
||
dir = grub_strchr (current_word + (device ? 2 + grub_strlen (device) : 0),
|
||
'/');
|
||
last_dir = grub_strrchr (current_word, '/');
|
||
if (dir)
|
||
{
|
||
char *dirfile;
|
||
|
||
current_word = last_dir + 1;
|
||
|
||
dir = grub_strdup (dir);
|
||
if (! dir)
|
||
{
|
||
ret = 1;
|
||
goto fail;
|
||
}
|
||
|
||
/* Cut away the filename part. */
|
||
dirfile = grub_strrchr (dir, '/');
|
||
dirfile[1] = '\0';
|
||
|
||
/* Iterate the directory. */
|
||
(fs->dir) (dev, dir, iterate_dir, NULL);
|
||
|
||
grub_free (dir);
|
||
|
||
if (grub_errno)
|
||
{
|
||
ret = 1;
|
||
goto fail;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
current_word += grub_strlen (current_word);
|
||
match = grub_strdup ("/");
|
||
if (! match)
|
||
{
|
||
ret = 1;
|
||
goto fail;
|
||
}
|
||
|
||
suffix = "";
|
||
num_found = 1;
|
||
}
|
||
|
||
fail:
|
||
if (dev)
|
||
grub_device_close (dev);
|
||
grub_free (device);
|
||
return ret;
|
||
}
|
||
|
||
/* Complete an argument. */
|
||
static int
|
||
complete_arguments (char *command)
|
||
{
|
||
grub_command_t cmd;
|
||
grub_extcmd_t ext;
|
||
const struct grub_arg_option *option;
|
||
char shortarg[] = "- ";
|
||
|
||
cmd = grub_command_find (command);
|
||
|
||
if (!cmd || !(cmd->flags & GRUB_COMMAND_FLAG_EXTCMD))
|
||
return 0;
|
||
|
||
ext = cmd->data;
|
||
if (!ext->options)
|
||
return 0;
|
||
|
||
if (add_completion ("-u", " ", GRUB_COMPLETION_TYPE_ARGUMENT))
|
||
return 1;
|
||
|
||
/* Add the short arguments. */
|
||
for (option = ext->options; option->doc; option++)
|
||
{
|
||
if (! option->shortarg)
|
||
continue;
|
||
|
||
shortarg[1] = option->shortarg;
|
||
if (add_completion (shortarg, " ", GRUB_COMPLETION_TYPE_ARGUMENT))
|
||
return 1;
|
||
|
||
}
|
||
|
||
/* First add the built-in arguments. */
|
||
if (add_completion ("--help", " ", GRUB_COMPLETION_TYPE_ARGUMENT))
|
||
return 1;
|
||
if (add_completion ("--usage", " ", GRUB_COMPLETION_TYPE_ARGUMENT))
|
||
return 1;
|
||
|
||
/* Add the long arguments. */
|
||
for (option = ext->options; option->doc; option++)
|
||
{
|
||
char *longarg;
|
||
if (!option->longarg)
|
||
continue;
|
||
|
||
longarg = grub_xasprintf ("--%s", option->longarg);
|
||
if (!longarg)
|
||
return 1;
|
||
|
||
if (add_completion (longarg, " ", GRUB_COMPLETION_TYPE_ARGUMENT))
|
||
{
|
||
grub_free (longarg);
|
||
return 1;
|
||
}
|
||
grub_free (longarg);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
static grub_parser_state_t
|
||
get_state (const char *cmdline)
|
||
{
|
||
grub_parser_state_t state = GRUB_PARSER_STATE_TEXT;
|
||
char use;
|
||
|
||
while (*cmdline)
|
||
state = grub_parser_cmdline_state (state, *(cmdline++), &use);
|
||
return state;
|
||
}
|
||
|
||
|
||
/* Try to complete the string in BUF. Return the characters that
|
||
should be added to the string. This command outputs the possible
|
||
completions by calling HOOK, in that case set RESTORE to 1 so the
|
||
caller can restore the prompt. */
|
||
char *
|
||
grub_normal_do_completion (char *buf, int *restore,
|
||
void (*hook) (const char *, grub_completion_type_t, int))
|
||
{
|
||
int argc;
|
||
char **argv;
|
||
|
||
/* Initialize variables. */
|
||
match = 0;
|
||
num_found = 0;
|
||
suffix = "";
|
||
print_func = hook;
|
||
|
||
*restore = 1;
|
||
|
||
if (grub_parser_split_cmdline (buf, 0, 0, &argc, &argv))
|
||
return 0;
|
||
|
||
if (argc == 0)
|
||
current_word = "";
|
||
else
|
||
current_word = argv[argc - 1];
|
||
|
||
if (argc > 1 && ! grub_strcmp (argv[0], "set"))
|
||
{
|
||
char *equals = grub_strchr (current_word, '=');
|
||
if (equals)
|
||
/* Complete the value of the variable. */
|
||
current_word = equals + 1;
|
||
}
|
||
|
||
/* Determine the state the command line is in, depending on the
|
||
state, it can be determined how to complete. */
|
||
cmdline_state = get_state (buf);
|
||
|
||
if (argc == 1 || argc == 0)
|
||
{
|
||
/* Complete a command. */
|
||
grub_command_t cmd;
|
||
FOR_COMMANDS(cmd)
|
||
{
|
||
if (cmd->prio & GRUB_COMMAND_FLAG_ACTIVE)
|
||
{
|
||
if (add_completion (cmd->name, " ", GRUB_COMPLETION_TYPE_COMMAND))
|
||
goto fail;
|
||
}
|
||
}
|
||
}
|
||
else if (*current_word == '-')
|
||
{
|
||
if (complete_arguments (buf))
|
||
goto fail;
|
||
}
|
||
else if (*current_word == '(' && ! grub_strchr (current_word, ')'))
|
||
{
|
||
/* Complete a device. */
|
||
if (complete_device ())
|
||
goto fail;
|
||
}
|
||
else
|
||
{
|
||
/* Complete a file. */
|
||
if (complete_file ())
|
||
goto fail;
|
||
}
|
||
|
||
/* If more than one match is found those matches will be printed and
|
||
the prompt should be restored. */
|
||
if (num_found > 1)
|
||
*restore = 1;
|
||
else
|
||
*restore = 0;
|
||
|
||
/* Return the part that matches. */
|
||
if (match)
|
||
{
|
||
char *ret;
|
||
char *escstr;
|
||
char *newstr;
|
||
int current_len;
|
||
int match_len;
|
||
int spaces = 0;
|
||
|
||
current_len = grub_strlen (current_word);
|
||
match_len = grub_strlen (match);
|
||
|
||
/* Count the number of spaces that have to be escaped. XXX:
|
||
More than just spaces have to be escaped. */
|
||
for (escstr = match + current_len; *escstr; escstr++)
|
||
if (*escstr == ' ')
|
||
spaces++;
|
||
|
||
ret = grub_malloc (match_len - current_len + grub_strlen (suffix) + spaces + 1);
|
||
newstr = ret;
|
||
for (escstr = match + current_len; *escstr; escstr++)
|
||
{
|
||
if (*escstr == ' ' && cmdline_state != GRUB_PARSER_STATE_QUOTE
|
||
&& cmdline_state != GRUB_PARSER_STATE_QUOTE)
|
||
*(newstr++) = '\\';
|
||
*(newstr++) = *escstr;
|
||
}
|
||
*newstr = '\0';
|
||
|
||
if (num_found == 1)
|
||
grub_strcpy (newstr, suffix);
|
||
|
||
if (*ret == '\0')
|
||
{
|
||
grub_free (ret);
|
||
goto fail;
|
||
}
|
||
|
||
if (argc != 0)
|
||
grub_free (argv[0]);
|
||
grub_free (match);
|
||
return ret;
|
||
}
|
||
|
||
fail:
|
||
if (argc != 0)
|
||
{
|
||
grub_free (argv[0]);
|
||
grub_free (argv);
|
||
}
|
||
grub_free (match);
|
||
grub_errno = GRUB_ERR_NONE;
|
||
|
||
return 0;
|
||
}
|