/*
*
* Shell Command Set Management
*
* Author:
* WORK: fernando.ruiz@ctv.es
* HOME: correo@fernando-ruiz.com
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <time.h>
#include <termios.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <rtems.h>
#include <rtems/shell.h>
#include <rtems/shellconfig.h>
#include "internal.h"
/*
* Common linked list of shell commands.
*
* Because the help report is very long, there is a topic for each command.
*
* Help list the topics
* help [topic] list the commands for the topic
* help [command] help for the command
*
*/
rtems_shell_cmd_t * rtems_shell_first_cmd;
rtems_shell_topic_t * rtems_shell_first_topic;
/*
* Find the topic from the set of topics registered.
*/
rtems_shell_topic_t * rtems_shell_lookup_topic(const char * topic) {
rtems_shell_topic_t * shell_topic;
shell_topic=rtems_shell_first_topic;
while (shell_topic) {
if (!strcmp(shell_topic->topic,topic))
return shell_topic;
shell_topic=shell_topic->next;
}
return NULL;
}
/*
* Add a new topic to the list of topics
*/
static rtems_shell_topic_t * rtems_shell_add_topic(const char * topic) {
rtems_shell_topic_t * current,*aux;
if (!rtems_shell_first_topic) {
aux = malloc(sizeof(rtems_shell_topic_t));
aux->topic = topic;
aux->next = NULL;
return rtems_shell_first_topic = aux;
}
current=rtems_shell_first_topic;
if (!strcmp(topic,current->topic))
return current;
while (current->next) {
if (!strcmp(topic,current->next->topic))
return current->next;
current=current->next;
}
aux = malloc(sizeof(rtems_shell_topic_t));
aux->topic = topic;
aux->next = NULL;
current->next = aux;
return aux;
}
/*
* Find the command in the set
*/
rtems_shell_cmd_t * rtems_shell_lookup_cmd(const char * cmd) {
rtems_shell_cmd_t * shell_cmd;
shell_cmd=rtems_shell_first_cmd;
while (shell_cmd) {
if (!strcmp(shell_cmd->name,cmd)) return shell_cmd;
shell_cmd=shell_cmd->next;
};
return NULL;
}
/*
* Add a command structure to the set of known commands
*/
rtems_shell_cmd_t *rtems_shell_add_cmd_struct(
rtems_shell_cmd_t *shell_cmd
)
{
rtems_shell_cmd_t *shell_pvt;
shell_pvt = rtems_shell_first_cmd;
while (shell_pvt) {
if (strcmp(shell_pvt->name, shell_cmd->name) == 0)
return NULL;
shell_pvt = shell_pvt->next;
}
if ( !rtems_shell_first_cmd ) {
rtems_shell_first_cmd = shell_cmd;
} else {
shell_pvt = rtems_shell_first_cmd;
while (shell_pvt->next)
shell_pvt = shell_pvt->next;
shell_pvt->next = shell_cmd;
}
rtems_shell_add_topic( shell_cmd->topic );
return shell_cmd;
}
/*
* Add a command as a set of arguments to the set and
* allocate the command structure on the fly.
*/
rtems_shell_cmd_t * rtems_shell_add_cmd(
const char *name,
const char *topic,
const char *usage,
rtems_shell_command_t command
)
{
rtems_shell_cmd_t *shell_cmd = NULL;
char *my_name = NULL;
char *my_topic = NULL;
char *my_usage = NULL;
/* Reject empty commands */
if (name == NULL || command == NULL) {
return NULL;
}
/* Allocate command stucture */
shell_cmd = (rtems_shell_cmd_t *) malloc(sizeof(rtems_shell_cmd_t));
if (shell_cmd == NULL) {
return NULL;
}
/* Allocate strings */
my_name = strdup(name);
my_topic = strdup(topic);
my_usage = strdup(usage);
/* Assign values */
shell_cmd->name = my_name;
shell_cmd->topic = my_topic;
shell_cmd->usage = my_usage;
shell_cmd->command = command;
shell_cmd->alias = NULL;
shell_cmd->next = NULL;
if (rtems_shell_add_cmd_struct(shell_cmd) == NULL) {
/* Something is wrong, free allocated resources */
free(my_usage);
free(my_topic);
free(my_name);
free(shell_cmd);
return NULL;
}
return shell_cmd;
}
void rtems_shell_initialize_command_set(void)
{
rtems_shell_cmd_t **c;
rtems_shell_alias_t **a;
for ( c = rtems_shell_Initial_commands ; *c ; c++ ) {
rtems_shell_add_cmd_struct( *c );
}
for ( a = rtems_shell_Initial_aliases ; *a ; a++ ) {
rtems_shell_alias_cmd( (*a)->name, (*a)->alias );
}
rtems_shell_register_monitor_commands();
}
/* ----------------------------------------------- *
* you can make an alias for every command.
* ----------------------------------------------- */
rtems_shell_cmd_t *rtems_shell_alias_cmd(
const char *cmd,
const char *alias
)
{
rtems_shell_cmd_t *shell_cmd, *shell_aux;
shell_aux = (rtems_shell_cmd_t *) NULL;
if (alias) {
shell_aux = rtems_shell_lookup_cmd(alias);
if (shell_aux != NULL) {
return NULL;
}
shell_cmd = rtems_shell_lookup_cmd(cmd);
if (shell_cmd != NULL) {
shell_aux = rtems_shell_add_cmd(
alias,
shell_cmd->topic,
shell_cmd->usage,
shell_cmd->command
);
if (shell_aux)
shell_aux->alias = shell_cmd;
}
}
return shell_aux;
}