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/*
* (C) Copyright 2000-2009
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* Command Processor Table
*/
#include <common.h>
#include <command.h>
#include <console.h>
#include <linux/ctype.h>
/*
* Use puts() instead of printf() to avoid printf buffer overflow
* for long help messages
*/
int _do_help(cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
int i;
int rcode = 0;
if (argc == 1) { /* show list of commands */
cmd_tbl_t *cmd_array[cmd_items];
int i, j, swaps;
/* Make array of commands from .uboot_cmd section */
cmdtp = cmd_start;
for (i = 0; i < cmd_items; i++) {
cmd_array[i] = cmdtp++;
}
/* Sort command list (trivial bubble sort) */
for (i = cmd_items - 1; i > 0; --i) {
swaps = 0;
for (j = 0; j < i; ++j) {
if (strcmp(cmd_array[j]->name,
cmd_array[j + 1]->name) > 0) {
cmd_tbl_t *tmp;
tmp = cmd_array[j];
cmd_array[j] = cmd_array[j + 1];
cmd_array[j + 1] = tmp;
++swaps;
}
}
if (!swaps)
break;
}
/* print short help (usage) */
for (i = 0; i < cmd_items; i++) {
const char *usage = cmd_array[i]->usage;
/* allow user abort */
if (ctrlc())
return 1;
if (usage == NULL)
continue;
printf("%-*s- %s\n", CONFIG_SYS_HELP_CMD_WIDTH,
cmd_array[i]->name, usage);
}
return 0;
}
/*
* command help (long version)
*/
for (i = 1; i < argc; ++i) {
cmdtp = find_cmd_tbl(argv[i], cmd_start, cmd_items);
if (cmdtp != NULL) {
rcode |= cmd_usage(cmdtp);
} else {
printf("Unknown command '%s' - try 'help' without arguments for list of all known commands\n\n",
argv[i]);
rcode = 1;
}
}
return rcode;
}
/* find command table entry for a command */
cmd_tbl_t *find_cmd_tbl(const char *cmd, cmd_tbl_t *table, int table_len)
{
cmd_tbl_t *cmdtp;
cmd_tbl_t *cmdtp_temp = table; /* Init value */
const char *p;
int len;
int n_found = 0;
if (!cmd)
return NULL;
/*
* Some commands allow length modifiers (like "cp.b");
* compare command name only until first dot.
*/
len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
for (cmdtp = table; cmdtp != table + table_len; 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 */
}
cmd_tbl_t *find_cmd(const char *cmd)
{
cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
const int len = ll_entry_count(cmd_tbl_t, cmd);
return find_cmd_tbl(cmd, start, len);
}
int cmd_usage(const cmd_tbl_t *cmdtp)
{
printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
#ifdef CONFIG_SYS_LONGHELP
printf("Usage:\n%s ", cmdtp->name);
if (!cmdtp->help) {
puts ("- No additional help available.\n");
return 1;
}
puts(cmdtp->help);
putc('\n');
#endif /* CONFIG_SYS_LONGHELP */
return 1;
}
#ifdef CONFIG_AUTO_COMPLETE
int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
{
static char tmp_buf[512];
int space;
space = last_char == '\0' || isblank(last_char);
if (space && argc == 1)
return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
if (!space && argc == 2)
return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
return 0;
}
/*************************************************************************************/
static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
{
cmd_tbl_t *cmdtp = ll_entry_start(cmd_tbl_t, cmd);
const int count = ll_entry_count(cmd_tbl_t, cmd);
const cmd_tbl_t *cmdend = cmdtp + count;
const char *p;
int len, clen;
int n_found = 0;
const char *cmd;
/* sanity? */
if (maxv < 2)
return -2;
cmdv[0] = NULL;
if (argc == 0) {
/* output full list of commands */
for (; cmdtp != cmdend; cmdtp++) {
if (n_found >= maxv - 2) {
cmdv[n_found++] = "...";
break;
}
cmdv[n_found++] = cmdtp->name;
}
cmdv[n_found] = NULL;
return n_found;
}
/* more than one arg or one but the start of the next */
if (argc > 1 || last_char == '\0' || isblank(last_char)) {
cmdtp = find_cmd(argv[0]);
if (cmdtp == NULL || cmdtp->complete == NULL) {
cmdv[0] = NULL;
return 0;
}
return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
}
cmd = argv[0];
/*
* Some commands allow length modifiers (like "cp.b");
* compare command name only until first dot.
*/
p = strchr(cmd, '.');
if (p == NULL)
len = strlen(cmd);
else
len = p - cmd;
/* return the partial matches */
for (; cmdtp != cmdend; cmdtp++) {
clen = strlen(cmdtp->name);
if (clen < len)
continue;
if (memcmp(cmd, cmdtp->name, len) != 0)
continue;
/* too many! */
if (n_found >= maxv - 2) {
cmdv[n_found++] = "...";
break;
}
cmdv[n_found++] = cmdtp->name;
}
cmdv[n_found] = NULL;
return n_found;
}
static int make_argv(char *s, int argvsz, char *argv[])
{
int argc = 0;
/* split into argv */
while (argc < argvsz - 1) {
/* skip any white space */
while (isblank(*s))
++s;
if (*s == '\0') /* end of s, no more args */
break;
argv[argc++] = s; /* begin of argument string */
/* find end of string */
while (*s && !isblank(*s))
++s;
if (*s == '\0') /* end of s, no more args */
break;
*s++ = '\0'; /* terminate current arg */
}
argv[argc] = NULL;
return argc;
}
static void print_argv(const char *banner, const char *leader, const char *sep, int linemax, char * const argv[])
{
int ll = leader != NULL ? strlen(leader) : 0;
int sl = sep != NULL ? strlen(sep) : 0;
int len, i;
if (banner) {
puts("\n");
puts(banner);
}
i = linemax; /* force leader and newline */
while (*argv != NULL) {
len = strlen(*argv) + sl;
if (i + len >= linemax) {
puts("\n");
if (leader)
puts(leader);
i = ll - sl;
} else if (sep)
puts(sep);
puts(*argv++);
i += len;
}
printf("\n");
}
static int find_common_prefix(char * const argv[])
{
int i, len;
char *anchor, *s, *t;
if (*argv == NULL)
return 0;
/* begin with max */
anchor = *argv++;
len = strlen(anchor);
while ((t = *argv++) != NULL) {
s = anchor;
for (i = 0; i < len; i++, t++, s++) {
if (*t != *s)
break;
}
len = s - anchor;
}
return len;
}
static char tmp_buf[CONFIG_SYS_CBSIZE]; /* copy of console I/O buffer */
int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp)
{
int n = *np, col = *colp;
char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
char *cmdv[20];
char *s, *t;
const char *sep;
int i, j, k, len, seplen, argc;
int cnt;
char last_char;
if (strcmp(prompt, CONFIG_SYS_PROMPT) != 0)
return 0; /* not in normal console */
cnt = strlen(buf);
if (cnt >= 1)
last_char = buf[cnt - 1];
else
last_char = '\0';
/* copy to secondary buffer which will be affected */
strcpy(tmp_buf, buf);
/* separate into argv */
argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
/* do the completion and return the possible completions */
i = complete_cmdv(argc, argv, last_char,
sizeof(cmdv) / sizeof(cmdv[0]), cmdv);
/* no match; bell and out */
if (i == 0) {
if (argc > 1) /* allow tab for non command */
return 0;
putc('\a');
return 1;
}
s = NULL;
len = 0;
sep = NULL;
seplen = 0;
if (i == 1) { /* one match; perfect */
k = strlen(argv[argc - 1]);
s = cmdv[0] + k;
len = strlen(s);
sep = " ";
seplen = 1;
} else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
k = strlen(argv[argc - 1]);
j -= k;
if (j > 0) {
s = cmdv[0] + k;
len = j;
}
}
if (s != NULL) {
k = len + seplen;
/* make sure it fits */
if (n + k >= CONFIG_SYS_CBSIZE - 2) {
putc('\a');
return 1;
}
t = buf + cnt;
for (i = 0; i < len; i++)
*t++ = *s++;
if (sep != NULL)
for (i = 0; i < seplen; i++)
*t++ = sep[i];
*t = '\0';
n += k;
col += k;
puts(t - k);
if (sep == NULL)
putc('\a');
*np = n;
*colp = col;
} else {
print_argv(NULL, " ", " ", 78, cmdv);
puts(prompt);
puts(buf);
}
return 1;
}
#endif
#ifdef CMD_DATA_SIZE
int cmd_get_data_size(char* arg, int default_size)
{
/* Check for a size specification .b, .w or .l.
*/
int len = strlen(arg);
if (len > 2 && arg[len-2] == '.') {
switch (arg[len-1]) {
case 'b':
return 1;
case 'w':
return 2;
case 'l':
return 4;
#ifdef CONFIG_SYS_SUPPORT_64BIT_DATA
case 'q':
return 8;
#endif
case 's':
return -2;
default:
return -1;
}
}
return default_size;
}
#endif
#if defined(CONFIG_NEEDS_MANUAL_RELOC)
DECLARE_GLOBAL_DATA_PTR;
void fixup_cmdtable(cmd_tbl_t *cmdtp, int size)
{
int i;
if (gd->reloc_off == 0)
return;
for (i = 0; i < size; i++) {
ulong addr;
addr = (ulong)(cmdtp->cmd) + gd->reloc_off;
#ifdef DEBUG_COMMANDS
printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
cmdtp->name, (ulong)(cmdtp->cmd), addr);
#endif
cmdtp->cmd =
(int (*)(struct cmd_tbl_s *, int, int, char * const []))addr;
addr = (ulong)(cmdtp->name) + gd->reloc_off;
cmdtp->name = (char *)addr;
if (cmdtp->usage) {
addr = (ulong)(cmdtp->usage) + gd->reloc_off;
cmdtp->usage = (char *)addr;
}
#ifdef CONFIG_SYS_LONGHELP
if (cmdtp->help) {
addr = (ulong)(cmdtp->help) + gd->reloc_off;
cmdtp->help = (char *)addr;
}
#endif
#ifdef CONFIG_AUTO_COMPLETE
if (cmdtp->complete) {
addr = (ulong)(cmdtp->complete) + gd->reloc_off;
cmdtp->complete =
(int (*)(int, char * const [], char, int, char * []))addr;
}
#endif
cmdtp++;
}
}
#endif
/**
* Call a command function. This should be the only route in U-Boot to call
* a command, so that we can track whether we are waiting for input or
* executing a command.
*
* @param cmdtp Pointer to the command to execute
* @param flag Some flags normally 0 (see CMD_FLAG_.. above)
* @param argc Number of arguments (arg 0 must be the command text)
* @param argv Arguments
* @return 0 if command succeeded, else non-zero (CMD_RET_...)
*/
static int cmd_call(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
int result;
result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
if (result)
debug("Command failed, result=%d\n", result);
return result;
}
enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
int *repeatable, ulong *ticks)
{
enum command_ret_t rc = CMD_RET_SUCCESS;
cmd_tbl_t *cmdtp;
/* Look up command in command table */
cmdtp = find_cmd(argv[0]);
if (cmdtp == NULL) {
printf("Unknown command '%s' - try 'help'\n", argv[0]);
return 1;
}
/* found - check max args */
if (argc > cmdtp->maxargs)
rc = CMD_RET_USAGE;
#if defined(CONFIG_CMD_BOOTD)
/* avoid "bootd" recursion */
else if (cmdtp->cmd == do_bootd) {
if (flag & CMD_FLAG_BOOTD) {
puts("'bootd' recursion detected\n");
rc = CMD_RET_FAILURE;
} else {
flag |= CMD_FLAG_BOOTD;
}
}
#endif
/* If OK so far, then do the command */
if (!rc) {
if (ticks)
*ticks = get_timer(0);
rc = cmd_call(cmdtp, flag, argc, argv);
if (ticks)
*ticks = get_timer(*ticks);
*repeatable &= cmdtp->repeatable;
}
if (rc == CMD_RET_USAGE)
rc = cmd_usage(cmdtp);
return rc;
}
int cmd_process_error(cmd_tbl_t *cmdtp, int err)
{
if (err) {
printf("Command '%s' failed: Error %d\n", cmdtp->name, err);
return 1;
}
return 0;
}