hostap/src/utils/edit_simple.c

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/*
* Minimal command line editing
* 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 "common.h"
#include "eloop.h"
#include "edit.h"
#define CMD_BUF_LEN 4096
static char cmdbuf[CMD_BUF_LEN];
static int cmdbuf_pos = 0;
static const char *ps2 = NULL;
static void *edit_cb_ctx;
static void (*edit_cmd_cb)(void *ctx, char *cmd);
static void (*edit_eof_cb)(void *ctx);
static void edit_read_char(int sock, void *eloop_ctx, void *sock_ctx)
{
int c;
unsigned char buf[1];
int res;
res = read(sock, buf, 1);
if (res < 0)
perror("read");
if (res <= 0) {
edit_eof_cb(edit_cb_ctx);
return;
}
c = buf[0];
if (c == '\r' || c == '\n') {
cmdbuf[cmdbuf_pos] = '\0';
cmdbuf_pos = 0;
edit_cmd_cb(edit_cb_ctx, cmdbuf);
printf("%s> ", ps2 ? ps2 : "");
fflush(stdout);
return;
}
if (c == '\b') {
if (cmdbuf_pos > 0)
cmdbuf_pos--;
return;
}
if (c >= 32 && c <= 255) {
if (cmdbuf_pos < (int) sizeof(cmdbuf) - 1) {
cmdbuf[cmdbuf_pos++] = c;
}
}
}
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, const char *ps)
{
edit_cb_ctx = ctx;
edit_cmd_cb = cmd_cb;
edit_eof_cb = eof_cb;
eloop_register_read_sock(STDIN_FILENO, edit_read_char, NULL, NULL);
ps2 = ps;
printf("%s> ", ps2 ? ps2 : "");
fflush(stdout);
return 0;
}
void edit_deinit(const char *history_file,
int (*filter_cb)(void *ctx, const char *cmd))
{
eloop_unregister_read_sock(STDIN_FILENO);
}
void edit_clear_line(void)
{
}
void edit_redraw(void)
{
cmdbuf[cmdbuf_pos] = '\0';
printf("\r> %s", cmdbuf);
}