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/*
* Command line editing and history wrapper for readline
* Copyright (c) 2010, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include <readline/readline.h>
#include <readline/history.h>
#include "common.h"
#include "eloop.h"
#include "edit.h"
static void *edit_cb_ctx;
static void (*edit_cmd_cb)(void *ctx, char *cmd);
static void (*edit_eof_cb)(void *ctx);
static char ** (*edit_completion_cb)(void *ctx, const char *cmd, int pos) =
NULL;
static char **pending_completions = NULL;
static void readline_free_completions(void)
{
int i;
if (pending_completions == NULL)
return;
for (i = 0; pending_completions[i]; i++)
os_free(pending_completions[i]);
os_free(pending_completions);
pending_completions = NULL;
}
static char * readline_completion_func(const char *text, int state)
{
static int pos = 0;
static size_t len = 0;
if (pending_completions == NULL) {
rl_attempted_completion_over = 1;
return NULL;
}
if (state == 0) {
pos = 0;
len = os_strlen(text);
}
for (; pending_completions[pos]; pos++) {
if (strncmp(pending_completions[pos], text, len) == 0)
return strdup(pending_completions[pos++]);
}
rl_attempted_completion_over = 1;
return NULL;
}
static char ** readline_completion(const char *text, int start, int end)
{
readline_free_completions();
if (edit_completion_cb)
pending_completions = edit_completion_cb(edit_cb_ctx,
rl_line_buffer, end);
return rl_completion_matches(text, readline_completion_func);
}
static void edit_read_char(int sock, void *eloop_ctx, void *sock_ctx)
{
rl_callback_read_char();
}
static void trunc_nl(char *str)
{
char *pos = str;
while (*pos != '\0') {
if (*pos == '\n') {
*pos = '\0';
break;
}
pos++;
}
}
static void readline_cmd_handler(char *cmd)
{
if (cmd && *cmd) {
HIST_ENTRY *h;
while (next_history())
;
h = previous_history();
if (h == NULL || os_strcmp(cmd, h->line) != 0)
add_history(cmd);
next_history();
}
if (cmd == NULL) {
edit_eof_cb(edit_cb_ctx);
return;
}
trunc_nl(cmd);
edit_cmd_cb(edit_cb_ctx, cmd);
}
int edit_init(void (*cmd_cb)(void *ctx, char *cmd),
void (*eof_cb)(void *ctx),
char ** (*completion_cb)(void *ctx, const char *cmd, int pos),
void *ctx, const char *history_file)
{
edit_cb_ctx = ctx;
edit_cmd_cb = cmd_cb;
edit_eof_cb = eof_cb;
edit_completion_cb = completion_cb;
rl_attempted_completion_function = readline_completion;
if (history_file) {
read_history(history_file);
stifle_history(100);
}
eloop_register_read_sock(STDIN_FILENO, edit_read_char, NULL, NULL);
rl_callback_handler_install("> ", readline_cmd_handler);
return 0;
}
void edit_deinit(const char *history_file,
int (*filter_cb)(void *ctx, const char *cmd))
{
rl_callback_handler_remove();
readline_free_completions();
eloop_unregister_read_sock(STDIN_FILENO);
if (history_file) {
/* Save command history, excluding lines that may contain
* passwords. */
HIST_ENTRY *h;
history_set_pos(0);
while ((h = current_history())) {
char *p = h->line;
while (*p == ' ' || *p == '\t')
p++;
if (filter_cb && filter_cb(edit_cb_ctx, p)) {
h = remove_history(where_history());
if (h) {
os_free(h->line);
free(h->data);
os_free(h);
} else
next_history();
} else
next_history();
}
write_history(history_file);
}
}
void edit_clear_line(void)
{
}
void edit_redraw(void)
{
rl_on_new_line();
rl_redisplay();
}
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