531 lines
9 KiB
C
531 lines
9 KiB
C
|
/*
|
||
|
* Command line editing and history
|
||
|
* Copyright (c) 2010, Jouni Malinen <j@w1.fi>
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or modify
|
||
|
* it under the terms of the GNU General Public License version 2 as
|
||
|
* published by the Free Software Foundation.
|
||
|
*
|
||
|
* Alternatively, this software may be distributed under the terms of BSD
|
||
|
* license.
|
||
|
*
|
||
|
* See README and COPYING for more details.
|
||
|
*/
|
||
|
|
||
|
#include "includes.h"
|
||
|
#include <termios.h>
|
||
|
|
||
|
#include "common.h"
|
||
|
#include "eloop.h"
|
||
|
#include "edit.h"
|
||
|
|
||
|
#define CMD_BUF_LEN 256
|
||
|
static char cmdbuf[CMD_BUF_LEN];
|
||
|
static int cmdbuf_pos = 0;
|
||
|
static int cmdbuf_len = 0;
|
||
|
#define CMD_HISTORY_LEN 20
|
||
|
static char history_buf[CMD_HISTORY_LEN][CMD_BUF_LEN];
|
||
|
static int history_pos = 0;
|
||
|
static int history_current = 0;
|
||
|
|
||
|
static void *edit_cb_ctx;
|
||
|
static void (*edit_cmd_cb)(void *ctx, char *cmd);
|
||
|
static void (*edit_eof_cb)(void *ctx);
|
||
|
|
||
|
static struct termios prevt, newt;
|
||
|
|
||
|
|
||
|
void edit_clear_line(void)
|
||
|
{
|
||
|
int i;
|
||
|
putchar('\r');
|
||
|
for (i = 0; i < cmdbuf_len + 2; i++)
|
||
|
putchar(' ');
|
||
|
}
|
||
|
|
||
|
|
||
|
static void move_start(void)
|
||
|
{
|
||
|
cmdbuf_pos = 0;
|
||
|
edit_redraw();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void move_end(void)
|
||
|
{
|
||
|
cmdbuf_pos = cmdbuf_len;
|
||
|
edit_redraw();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void move_left(void)
|
||
|
{
|
||
|
if (cmdbuf_pos > 0) {
|
||
|
cmdbuf_pos--;
|
||
|
edit_redraw();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
static void move_right(void)
|
||
|
{
|
||
|
if (cmdbuf_pos < cmdbuf_len) {
|
||
|
cmdbuf_pos++;
|
||
|
edit_redraw();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
static void move_word_left(void)
|
||
|
{
|
||
|
while (cmdbuf_pos > 0 && cmdbuf[cmdbuf_pos - 1] == ' ')
|
||
|
cmdbuf_pos--;
|
||
|
while (cmdbuf_pos > 0 && cmdbuf[cmdbuf_pos - 1] != ' ')
|
||
|
cmdbuf_pos--;
|
||
|
edit_redraw();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void move_word_right(void)
|
||
|
{
|
||
|
while (cmdbuf_pos < cmdbuf_len && cmdbuf[cmdbuf_pos] == ' ')
|
||
|
cmdbuf_pos++;
|
||
|
while (cmdbuf_pos < cmdbuf_len && cmdbuf[cmdbuf_pos] != ' ')
|
||
|
cmdbuf_pos++;
|
||
|
edit_redraw();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void delete_left(void)
|
||
|
{
|
||
|
if (cmdbuf_pos == 0)
|
||
|
return;
|
||
|
|
||
|
edit_clear_line();
|
||
|
os_memmove(cmdbuf + cmdbuf_pos - 1, cmdbuf + cmdbuf_pos,
|
||
|
cmdbuf_len - cmdbuf_pos);
|
||
|
cmdbuf_pos--;
|
||
|
cmdbuf_len--;
|
||
|
edit_redraw();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void delete_current(void)
|
||
|
{
|
||
|
if (cmdbuf_pos == cmdbuf_len)
|
||
|
return;
|
||
|
|
||
|
edit_clear_line();
|
||
|
os_memmove(cmdbuf + cmdbuf_pos, cmdbuf + cmdbuf_pos + 1,
|
||
|
cmdbuf_len - cmdbuf_pos);
|
||
|
cmdbuf_len--;
|
||
|
edit_redraw();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void delete_word(void)
|
||
|
{
|
||
|
edit_clear_line();
|
||
|
while (cmdbuf_len > 0 && cmdbuf[cmdbuf_len - 1] == ' ')
|
||
|
cmdbuf_len--;
|
||
|
while (cmdbuf_len > 0 && cmdbuf[cmdbuf_len - 1] != ' ')
|
||
|
cmdbuf_len--;
|
||
|
edit_redraw();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void clear_left(void)
|
||
|
{
|
||
|
if (cmdbuf_pos == 0)
|
||
|
return;
|
||
|
|
||
|
edit_clear_line();
|
||
|
os_memmove(cmdbuf, cmdbuf + cmdbuf_pos, cmdbuf_len - cmdbuf_pos);
|
||
|
cmdbuf_len -= cmdbuf_pos;
|
||
|
cmdbuf_pos = 0;
|
||
|
edit_redraw();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void clear_right(void)
|
||
|
{
|
||
|
if (cmdbuf_pos == cmdbuf_len)
|
||
|
return;
|
||
|
|
||
|
edit_clear_line();
|
||
|
cmdbuf_len = cmdbuf_pos;
|
||
|
edit_redraw();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void history_add(const char *str)
|
||
|
{
|
||
|
int prev;
|
||
|
|
||
|
if (str[0] == '\0')
|
||
|
return;
|
||
|
|
||
|
if (history_pos == 0)
|
||
|
prev = CMD_HISTORY_LEN - 1;
|
||
|
else
|
||
|
prev = history_pos - 1;
|
||
|
if (os_strcmp(history_buf[prev], str) == 0)
|
||
|
return;
|
||
|
|
||
|
os_strlcpy(history_buf[history_pos], str, CMD_BUF_LEN);
|
||
|
history_pos++;
|
||
|
if (history_pos == CMD_HISTORY_LEN)
|
||
|
history_pos = 0;
|
||
|
history_current = history_pos;
|
||
|
}
|
||
|
|
||
|
|
||
|
static void history_prev(void)
|
||
|
{
|
||
|
int pos;
|
||
|
|
||
|
if (history_current == (history_pos + 1) % CMD_HISTORY_LEN)
|
||
|
return;
|
||
|
|
||
|
pos = history_current;
|
||
|
|
||
|
if (history_current == history_pos && cmdbuf_len) {
|
||
|
cmdbuf[cmdbuf_len] = '\0';
|
||
|
history_add(cmdbuf);
|
||
|
}
|
||
|
|
||
|
if (pos > 0)
|
||
|
pos--;
|
||
|
else
|
||
|
pos = CMD_HISTORY_LEN - 1;
|
||
|
if (history_buf[pos][0] == '\0')
|
||
|
return;
|
||
|
history_current = pos;
|
||
|
|
||
|
edit_clear_line();
|
||
|
cmdbuf_len = cmdbuf_pos = os_strlen(history_buf[history_current]);
|
||
|
os_memcpy(cmdbuf, history_buf[history_current], cmdbuf_len);
|
||
|
edit_redraw();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void history_next(void)
|
||
|
{
|
||
|
if (history_current == history_pos)
|
||
|
return;
|
||
|
|
||
|
history_current++;
|
||
|
if (history_current == CMD_HISTORY_LEN)
|
||
|
history_current = 0;
|
||
|
|
||
|
edit_clear_line();
|
||
|
cmdbuf_len = cmdbuf_pos = os_strlen(history_buf[history_current]);
|
||
|
os_memcpy(cmdbuf, history_buf[history_current], cmdbuf_len);
|
||
|
edit_redraw();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void history_debug_dump(void)
|
||
|
{
|
||
|
int p;
|
||
|
edit_clear_line();
|
||
|
printf("\r");
|
||
|
p = (history_pos + 1) % CMD_HISTORY_LEN;
|
||
|
for (;;) {
|
||
|
printf("[%d%s%s] %s\n",
|
||
|
p, p == history_current ? "C" : "",
|
||
|
p == history_pos ? "P" : "", history_buf[p]);
|
||
|
if (p == history_pos)
|
||
|
break;
|
||
|
p++;
|
||
|
if (p == CMD_HISTORY_LEN)
|
||
|
p = 0;
|
||
|
}
|
||
|
edit_redraw();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void insert_char(int c)
|
||
|
{
|
||
|
if (c < 32 && c > 255) {
|
||
|
printf("[%d]\n", c);
|
||
|
edit_redraw();
|
||
|
}
|
||
|
|
||
|
if (cmdbuf_len >= (int) sizeof(cmdbuf) - 1)
|
||
|
return;
|
||
|
if (cmdbuf_len == cmdbuf_pos) {
|
||
|
cmdbuf[cmdbuf_pos++] = c;
|
||
|
cmdbuf_len++;
|
||
|
putchar(c);
|
||
|
fflush(stdout);
|
||
|
} else {
|
||
|
os_memmove(cmdbuf + cmdbuf_pos + 1, cmdbuf + cmdbuf_pos,
|
||
|
cmdbuf_len - cmdbuf_pos);
|
||
|
cmdbuf[cmdbuf_pos++] = c;
|
||
|
cmdbuf_len++;
|
||
|
edit_redraw();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
static void process_cmd(void)
|
||
|
{
|
||
|
|
||
|
if (cmdbuf_len == 0) {
|
||
|
printf("\n> ");
|
||
|
fflush(stdout);
|
||
|
return;
|
||
|
}
|
||
|
printf("\n");
|
||
|
cmdbuf[cmdbuf_len] = '\0';
|
||
|
history_add(cmdbuf);
|
||
|
cmdbuf_pos = 0;
|
||
|
cmdbuf_len = 0;
|
||
|
edit_cmd_cb(edit_cb_ctx, cmdbuf);
|
||
|
printf("> ");
|
||
|
fflush(stdout);
|
||
|
}
|
||
|
|
||
|
|
||
|
static void edit_read_char(int sock, void *eloop_ctx, void *sock_ctx)
|
||
|
{
|
||
|
int c;
|
||
|
unsigned char buf[1];
|
||
|
int res;
|
||
|
static int esc = -1;
|
||
|
static char esc_buf[6];
|
||
|
|
||
|
res = read(sock, buf, 1);
|
||
|
if (res < 0)
|
||
|
perror("read");
|
||
|
if (res <= 0) {
|
||
|
edit_eof_cb(edit_cb_ctx);
|
||
|
return;
|
||
|
}
|
||
|
c = buf[0];
|
||
|
|
||
|
if (esc >= 0) {
|
||
|
if (esc == 5) {
|
||
|
printf("{ESC%s}[0]\n", esc_buf);
|
||
|
edit_redraw();
|
||
|
esc = -1;
|
||
|
} else {
|
||
|
esc_buf[esc++] = c;
|
||
|
esc_buf[esc] = '\0';
|
||
|
if (esc == 1)
|
||
|
return;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (esc == 2 && esc_buf[0] == '[' && c >= 'A' && c <= 'Z') {
|
||
|
switch (c) {
|
||
|
case 'A': /* up */
|
||
|
history_prev();
|
||
|
break;
|
||
|
case 'B': /* down */
|
||
|
history_next();
|
||
|
break;
|
||
|
case 'C': /* right */
|
||
|
move_right();
|
||
|
break;
|
||
|
case 'D': /* left */
|
||
|
move_left();
|
||
|
break;
|
||
|
case 'F': /* end */
|
||
|
move_end();
|
||
|
break;
|
||
|
case 'H': /* home */
|
||
|
move_start();
|
||
|
break;
|
||
|
default:
|
||
|
printf("{ESC%s}[1]\n", esc_buf);
|
||
|
edit_redraw();
|
||
|
break;
|
||
|
}
|
||
|
esc = -1;
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if (esc > 1 && esc_buf[0] == '[') {
|
||
|
if ((c >= '0' && c <= '9') || c == ';')
|
||
|
return;
|
||
|
|
||
|
if (esc_buf[1] == '1' && esc_buf[2] == ';' &&
|
||
|
esc_buf[3] == '5') {
|
||
|
switch (esc_buf[4]) {
|
||
|
case 'A': /* Ctrl-Up */
|
||
|
case 'B': /* Ctrl-Down */
|
||
|
break;
|
||
|
case 'C': /* Ctrl-Right */
|
||
|
move_word_right();
|
||
|
break;
|
||
|
case 'D': /* Ctrl-Left */
|
||
|
move_word_left();
|
||
|
break;
|
||
|
default:
|
||
|
printf("{ESC%s}[2]\n", esc_buf);
|
||
|
edit_redraw();
|
||
|
break;
|
||
|
}
|
||
|
esc = -1;
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
switch (c) {
|
||
|
case '~':
|
||
|
switch (atoi(&esc_buf[1])) {
|
||
|
case 2: /* Insert */
|
||
|
break;
|
||
|
case 3: /* Delete */
|
||
|
delete_current();
|
||
|
break;
|
||
|
case 5: /* Page Up */
|
||
|
case 6: /* Page Down */
|
||
|
case 15: /* F5 */
|
||
|
case 17: /* F6 */
|
||
|
case 18: /* F7 */
|
||
|
case 19: /* F8 */
|
||
|
case 20: /* F9 */
|
||
|
case 21: /* F10 */
|
||
|
case 23: /* F11 */
|
||
|
case 24: /* F12 */
|
||
|
break;
|
||
|
default:
|
||
|
printf("{ESC%s}[3]\n", esc_buf);
|
||
|
edit_redraw();
|
||
|
break;
|
||
|
}
|
||
|
break;
|
||
|
default:
|
||
|
printf("{ESC%s}[4]\n", esc_buf);
|
||
|
edit_redraw();
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
esc = -1;
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if (esc > 1 && esc_buf[0] == 'O') {
|
||
|
switch (esc_buf[1]) {
|
||
|
case 'P': /* F1 */
|
||
|
history_debug_dump();
|
||
|
break;
|
||
|
case 'Q': /* F2 */
|
||
|
case 'R': /* F3 */
|
||
|
case 'S': /* F4 */
|
||
|
break;
|
||
|
default:
|
||
|
printf("{ESC%s}[5]\n", esc_buf);
|
||
|
edit_redraw();
|
||
|
break;
|
||
|
}
|
||
|
esc = -1;
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if (esc > 1) {
|
||
|
printf("{ESC%s}[6]\n", esc_buf);
|
||
|
edit_redraw();
|
||
|
esc = -1;
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
switch (c) {
|
||
|
case 1: /* ^A */
|
||
|
move_start();
|
||
|
break;
|
||
|
case 4: /* ^D */
|
||
|
if (cmdbuf_len > 0) {
|
||
|
delete_current();
|
||
|
return;
|
||
|
}
|
||
|
printf("\n");
|
||
|
edit_eof_cb(edit_cb_ctx);
|
||
|
break;
|
||
|
case 5: /* ^E */
|
||
|
move_end();
|
||
|
break;
|
||
|
case 8: /* ^H = BS */
|
||
|
delete_left();
|
||
|
break;
|
||
|
case 9: /* ^I = TAB */
|
||
|
break;
|
||
|
case 10: /* NL */
|
||
|
case 13: /* CR */
|
||
|
process_cmd();
|
||
|
break;
|
||
|
case 11: /* ^K */
|
||
|
clear_right();
|
||
|
break;
|
||
|
case 14: /* ^N */
|
||
|
history_next();
|
||
|
break;
|
||
|
case 16: /* ^P */
|
||
|
history_prev();
|
||
|
break;
|
||
|
case 18: /* ^R */
|
||
|
/* TODO: search history */
|
||
|
break;
|
||
|
case 21: /* ^U */
|
||
|
clear_left();
|
||
|
break;
|
||
|
case 23: /* ^W */
|
||
|
delete_word();
|
||
|
break;
|
||
|
case 27: /* ESC */
|
||
|
esc = 0;
|
||
|
break;
|
||
|
case 127: /* DEL */
|
||
|
delete_left();
|
||
|
break;
|
||
|
default:
|
||
|
insert_char(c);
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
int edit_init(void (*cmd_cb)(void *ctx, char *cmd),
|
||
|
void (*eof_cb)(void *ctx),
|
||
|
void *ctx)
|
||
|
{
|
||
|
os_memset(history_buf, 0, sizeof(history_buf));
|
||
|
|
||
|
edit_cb_ctx = ctx;
|
||
|
edit_cmd_cb = cmd_cb;
|
||
|
edit_eof_cb = eof_cb;
|
||
|
|
||
|
tcgetattr(STDIN_FILENO, &prevt);
|
||
|
newt = prevt;
|
||
|
newt.c_lflag &= ~(ICANON | ECHO);
|
||
|
tcsetattr(STDIN_FILENO, TCSANOW, &newt);
|
||
|
|
||
|
eloop_register_read_sock(STDIN_FILENO, edit_read_char, NULL, NULL);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
void edit_deinit(void)
|
||
|
{
|
||
|
eloop_unregister_read_sock(STDIN_FILENO);
|
||
|
tcsetattr(STDIN_FILENO, TCSANOW, &prevt);
|
||
|
}
|
||
|
|
||
|
|
||
|
void edit_redraw(void)
|
||
|
{
|
||
|
char tmp;
|
||
|
cmdbuf[cmdbuf_len] = '\0';
|
||
|
printf("\r> %s", cmdbuf);
|
||
|
if (cmdbuf_pos != cmdbuf_len) {
|
||
|
tmp = cmdbuf[cmdbuf_pos];
|
||
|
cmdbuf[cmdbuf_pos] = '\0';
|
||
|
printf("\r> %s", cmdbuf);
|
||
|
cmdbuf[cmdbuf_pos] = tmp;
|
||
|
}
|
||
|
fflush(stdout);
|
||
|
}
|