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/* $NetBSD: commands.c,v 1.4 2011/09/15 11:46:19 blymn Exp $ */
/*-
* Copyright 2009 Brett Lymn <blymn@NetBSD.org>
*
* All rights reserved.
*
* This code has been donated to The NetBSD Foundation by the Author.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software withough specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
*/
#include <curses.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <err.h>
#include <sys/types.h>
#include "returns.h"
#include "slave.h"
#include "command_table.h"
extern int cmdpipe[2];
extern int slvpipe[2];
static void report_type(returns_enum_t);
static void report_message(int, const char *);
/*
* Match the passed command string and execute the associated test
* function.
*/
void
command_execute(char *func, int nargs, char **args)
{
size_t i;
i = 0;
while (i < ncmds) {
if (strcasecmp(func, commands[i].name) == 0) {
/* matched function */
commands[i].func(nargs, args);
return;
}
i++;
}
report_status("UNKNOWN_FUNCTION");
}
/*
* Report an pointer value back to the director
*/
void
report_ptr(void *ptr)
{
char *string;
if (ptr == NULL)
asprintf(&string, "NULL");
else
asprintf(&string, "%p", ptr);
report_status(string);
free(string);
}
/*
* Report an integer value back to the director
*/
void
report_int(int value)
{
char *string;
asprintf(&string, "%d", value);
report_status(string);
free(string);
}
/*
* Report either an ERR or OK back to the director
*/
void
report_return(int status)
{
if (status == ERR)
report_type(ret_err);
else if (status == OK)
report_type(ret_ok);
else
report_status("INVALID_RETURN");
}
/*
* Report the type back to the director via the command pipe
*/
static void
report_type(returns_enum_t return_type)
{
int type;
type = return_type;
if (write(slvpipe[WRITE_PIPE], &type, sizeof(int)) < 0)
err(1, "command pipe write for status type failed");
}
/*
* Report the number of returns back to the director via the command pipe
*/
void
report_count(int count)
{
int type;
type = ret_count;
if (write(slvpipe[WRITE_PIPE], &type, sizeof(int)) < 0)
err(1, "command pipe write for count type failed");
if (write(slvpipe[WRITE_PIPE], &count, sizeof(int)) < 0)
err(1, "command pipe write for count");
}
/*
* Report the status back to the director via the command pipe
*/
void
report_status(const char *status)
{
report_message(ret_string, status);
}
/*
* Report an error message back to the director via the command pipe.
*/
void
report_error(const char *status)
{
report_message(ret_slave_error, status);
}
/*
* Report the message with the given type back to the director via the
* command pipe.
*/
static void
report_message(int type, const char *status)
{
int len;
len = strlen(status);
if (write(slvpipe[WRITE_PIPE], &type, sizeof(int)) < 0)
err(1, "command pipe write for message type failed");
if (write(slvpipe[WRITE_PIPE], &len, sizeof(int)) < 0)
err(1, "command pipe write for message length failed");
if (write(slvpipe[WRITE_PIPE], status, len) < 0)
err(1, "command pipe write of message data failed");
}
/*
* Report a string of chtype back to the director via the command pipe.
*/
void
report_byte(chtype c)
{
chtype string[2];
string[0] = c;
string[1] = A_NORMAL | '\0';
report_nstr(string);
}
/*
* Report a string of chtype back to the director via the command pipe.
*/
void
report_nstr(chtype *string)
{
int len, type;
chtype *p;
len = 0;
p = string;
while ((*p++ & __CHARTEXT) != 0) {
len++;
}
len++; /* add in the termination chtype */
len *= sizeof(chtype);
type = ret_byte;
if (write(slvpipe[WRITE_PIPE], &type, sizeof(int)) < 0)
err(1, "%s: command pipe write for status type failed",
__func__);
if (write(slvpipe[WRITE_PIPE], &len, sizeof(int)) < 0)
err(1, "%s: command pipe write for status length failed",
__func__);
if (write(slvpipe[WRITE_PIPE], string, len) < 0)
err(1, "%s: command pipe write of status data failed",
__func__);
}
/*
* Check the number of args we received are what we expect. Return an
* error if they do not match.
*/
int
check_arg_count(int nargs, int expected)
{
if (nargs != expected) {
report_count(1);
report_error("INCORRECT_ARGUMENT_NUMBER");
return(1);
}
return(0);
}
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