blob: ab02ed5322a4a00d590518ab92a3b88fdf0ec9e4 [file] [log] [blame] [edit]
/*
* (C) Copyright 2000-2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*
* Command Processor Table
*/
#include <common.h>
#include <command.h>
#include <xfuncs.h>
#include <malloc.h>
#include <environment.h>
#include <linux/list.h>
#include <init.h>
#include <complete.h>
#include <getopt.h>
LIST_HEAD(command_list);
EXPORT_SYMBOL(command_list);
#ifdef CONFIG_SHELL_HUSH
static int do_exit(struct command *cmdtp, int argc, char *argv[])
{
int r;
r = 0;
if (argc > 1)
r = simple_strtoul(argv[1], NULL, 0);
return -r - 2;
}
BAREBOX_CMD_START(exit)
.cmd = do_exit,
.usage = "exit script",
BAREBOX_CMD_END
#endif
void barebox_cmd_usage(struct command *cmdtp)
{
#ifdef CONFIG_LONGHELP
/* found - print (long) help info */
if (cmdtp->help) {
puts (cmdtp->help);
} else {
puts (cmdtp->name);
putchar (' ');
puts ("- No help available.\n");
}
putchar ('\n');
#else /* no long help available */
if (cmdtp->usage) {
puts (cmdtp->usage);
puts("\n");
}
#endif /* CONFIG_LONGHELP */
}
EXPORT_SYMBOL(barebox_cmd_usage);
static int compare(struct list_head *a, struct list_head *b)
{
char *na = (char*)list_entry(a, struct command, list)->name;
char *nb = (char*)list_entry(b, struct command, list)->name;
return strcmp(na, nb);
}
int execute_command(int argc, char **argv)
{
struct command *cmdtp;
int ret;
getopt_reset();
/* Look up command in command table */
if ((cmdtp = find_cmd(argv[0]))) {
/* OK - call function to do the command */
ret = cmdtp->cmd(cmdtp, argc, argv);
if (ret == COMMAND_ERROR_USAGE) {
barebox_cmd_usage(cmdtp);
return COMMAND_ERROR;
}
return ret;
} else {
#ifdef CONFIG_CMD_HELP
printf ("Unknown command '%s' - try 'help'\n", argv[0]);
#else
printf ("Unknown command '%s'\n", argv[0]);
#endif
return -1; /* give up after bad command */
}
}
int register_command(struct command *cmd)
{
/*
* We do not check if the command already exists.
* This allows us to overwrite a builtin command
* with a module.
*/
debug("register command %s\n", cmd->name);
list_add_sort(&cmd->list, &command_list, compare);
if (cmd->aliases) {
char **aliases = (char**)cmd->aliases;
while(*aliases) {
char *usage = "alias for ";
struct command *c = xzalloc(sizeof(struct command));
memcpy(c, cmd, sizeof(struct command));
c->name = *aliases;
c->usage = xmalloc(strlen(usage) + strlen(cmd->name) + 1);
sprintf((char*)c->usage, "%s%s", usage, cmd->name);
c->aliases = NULL;
register_command(c);
aliases++;
}
}
return 0;
}
EXPORT_SYMBOL(register_command);
/*
* find command table entry for a command
*/
struct command *find_cmd (const char *cmd)
{
struct command *cmdtp;
struct command *cmdtp_temp = &__barebox_cmd_start; /*Init value */
int len;
int n_found = 0;
len = strlen (cmd);
cmdtp = list_entry(&command_list, struct command, list);
for_each_command(cmdtp) {
if (strncmp (cmd, cmdtp->name, len) == 0) {
if (len == strlen (cmdtp->name))
return cmdtp; /* full match */
cmdtp_temp = cmdtp; /* abbreviated command ? */
n_found++;
}
}
if (n_found == 1) { /* exactly one match */
return cmdtp_temp;
}
return NULL; /* not found or ambiguous command */
}
/*
* Put all commands into a linked list. Without module support we could use
* the raw command array, but with module support a list is easier to handle.
* It does not create significant overhead so do it also without module
* support.
*/
static int init_command_list(void)
{
struct command *cmdtp;
for (cmdtp = &__barebox_cmd_start;
cmdtp != &__barebox_cmd_end;
cmdtp++)
register_command(cmdtp);
return 0;
}
late_initcall(init_command_list);