diff options
Diffstat (limited to 'cpukit/libmisc/shell/shell_cmdset.c')
| -rw-r--r-- | cpukit/libmisc/shell/shell_cmdset.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/cpukit/libmisc/shell/shell_cmdset.c b/cpukit/libmisc/shell/shell_cmdset.c new file mode 100644 index 0000000000..2abaed9242 --- /dev/null +++ b/cpukit/libmisc/shell/shell_cmdset.c @@ -0,0 +1,234 @@ +/* + * + * 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. + * + * $Id$ + */ + +#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 (rtems_shell_topic_t *) NULL; +} + +/* + * Add a new topic to the list of topics + */ +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 = (rtems_shell_topic_t*)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 = (rtems_shell_topic_t*)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 (rtems_shell_cmd_t *) 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; +} |