view rvinterf/asyncshell/usercmd.c @ 407:19e5a3e2f9c0

fcup-settime: moved time() retrieval a little closer to the output A fundamental problem with all simple time transfer tools is that there is always some delay between the time retrieval on the source system and that transmitted time being set on the destination, and the resulting time on the destination system is off by that delay amount. This delay cannot be fully eliminated when working in a simple environment like ours, but we should make our best effort to minimize it. In the present case, moving the atinterf_init() call before the time() retrieval should make a teensy-tiny improvement.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Aug 2018 21:52:17 +0000
parents 8c7e86bc137e
children e13f60d4f8dd
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/*
 * This module implements interactive fc-shell command dispatch.
 */

#include <sys/types.h>
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>

extern char usercmd[];

extern void cmd_disable();
extern void cmd_enable();
extern void cmd_help();
extern void cmd_key_interactive();
extern void cmd_keydown_interactive();
extern void cmd_keyup_interactive();
extern void cmd_poweroff();
extern void cmd_sendat();
extern void cmd_send_interactive();
extern void cmd_sp_interactive();
extern void cmd_tch_dispatch();
extern void cmd_tchdl_interactive();
extern void cmd_tgtreset();

void
cmd_exit()
{
	tty_cleanup();
	exit(0);
}

static struct cmdtab {
	char *cmd;
	void (*func)();
} cmdtab[] = {
	{"disable", cmd_disable},
	{"enable", cmd_enable},
	{"exit", cmd_exit},
	{"help", cmd_help},
	{"key", cmd_key_interactive},
	{"keydown", cmd_keydown_interactive},
	{"keyup", cmd_keyup_interactive},
	{"poweroff", cmd_poweroff},
	{"quit", cmd_exit},
	{"send", cmd_send_interactive},
	{"sp", cmd_sp_interactive},
	{"str", cmd_sendat},
	{"tch", cmd_tch_dispatch},
	{"tch-dl", cmd_tchdl_interactive},
	{"tgtreset", cmd_tgtreset},
	{0, 0}
};

void
dispatch_user_cmd()
{
	char *cp, *np;
	struct cmdtab *tp;

	for (cp = usercmd; isspace(*cp); cp++)
		;
	if (!*cp || *cp == '#')
		return;
	if (!strncmp(cp, "AT", 2) || !strncmp(cp, "at", 2)) {
		cmd_sendat(cp);
		return;
	}
	for (np = cp; *cp && !isspace(*cp); cp++)
		;
	if (*cp)
		*cp++ = '\0';
	for (tp = cmdtab; tp->cmd; tp++)
		if (!strcmp(tp->cmd, np))
			break;
	if (tp->func)
		tp->func(cp);
	else
		printf("error: no such command\n");
}