1/*
2 * Minimal command line editing
3 * Copyright (c) 2010, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#include "includes.h"
10
11#include "common.h"
12#include "eloop.h"
13#include "edit.h"
14
15
16#define CMD_BUF_LEN 4096
17static char cmdbuf[CMD_BUF_LEN];
18static int cmdbuf_pos = 0;
19static const char *ps2 = NULL;
20
21static void *edit_cb_ctx;
22static void (*edit_cmd_cb)(void *ctx, char *cmd);
23static void (*edit_eof_cb)(void *ctx);
24
25
26static void edit_read_char(int sock, void *eloop_ctx, void *sock_ctx)
27{
28	int c;
29	unsigned char buf[1];
30	int res;
31
32	res = read(sock, buf, 1);
33	if (res < 0)
34		perror("read");
35	if (res <= 0) {
36		edit_eof_cb(edit_cb_ctx);
37		return;
38	}
39	c = buf[0];
40
41	if (c == '\r' || c == '\n') {
42		cmdbuf[cmdbuf_pos] = '\0';
43		cmdbuf_pos = 0;
44		edit_cmd_cb(edit_cb_ctx, cmdbuf);
45		printf("%s> ", ps2 ? ps2 : "");
46		fflush(stdout);
47		return;
48	}
49
50	if (c == '\b') {
51		if (cmdbuf_pos > 0)
52			cmdbuf_pos--;
53		return;
54	}
55
56	if (c >= 32 && c <= 255) {
57		if (cmdbuf_pos < (int) sizeof(cmdbuf) - 1) {
58			cmdbuf[cmdbuf_pos++] = c;
59		}
60	}
61}
62
63
64int edit_init(void (*cmd_cb)(void *ctx, char *cmd),
65	      void (*eof_cb)(void *ctx),
66	      char ** (*completion_cb)(void *ctx, const char *cmd, int pos),
67	      void *ctx, const char *history_file, const char *ps)
68{
69	edit_cb_ctx = ctx;
70	edit_cmd_cb = cmd_cb;
71	edit_eof_cb = eof_cb;
72	eloop_register_read_sock(STDIN_FILENO, edit_read_char, NULL, NULL);
73	ps2 = ps;
74
75	printf("%s> ", ps2 ? ps2 : "");
76	fflush(stdout);
77
78	return 0;
79}
80
81
82void edit_deinit(const char *history_file,
83		 int (*filter_cb)(void *ctx, const char *cmd))
84{
85	eloop_unregister_read_sock(STDIN_FILENO);
86}
87
88
89void edit_clear_line(void)
90{
91}
92
93
94void edit_redraw(void)
95{
96	cmdbuf[cmdbuf_pos] = '\0';
97	printf("\r> %s", cmdbuf);
98}
99