nes-proj/apps/shell/shell-exec.c

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/*
* Copyright (c) 2008, Swedish Institute of Computer Science.
* All rights reserved.
*
* 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. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* A brief description of what this file is.
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "contiki.h"
#include "shell-exec.h"
#include "loader/elfloader.h"
#include <stdio.h>
#include <string.h>
/*---------------------------------------------------------------------------*/
PROCESS(shell_exec_process, "exec");
SHELL_COMMAND(exec_command,
"exec",
2008-07-03 21:13:13 +00:00
"exec <filename>: load and execute the ELF file filename",
&shell_exec_process);
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(shell_exec_process, ev, data)
{
char *name;
int fd;
PROCESS_BEGIN();
name = data;
if(name == NULL || strlen(name) == 0) {
shell_output_str(&exec_command,
"exec <file>: filename must be given", "");
PROCESS_EXIT();
}
/* Kill any old processes. */
if(elfloader_autostart_processes != NULL) {
autostart_exit(elfloader_autostart_processes);
}
fd = cfs_open(name, CFS_READ | CFS_WRITE);
if(fd < 0) {
shell_output_str(&exec_command,
"exec: could not open ", name);
} else {
int ret;
char *print, *symbol;
ret = elfloader_load(fd);
cfs_close(fd);
symbol = "";
switch(ret) {
case ELFLOADER_OK:
print = "OK";
break;
case ELFLOADER_BAD_ELF_HEADER:
print = "Bad ELF header";
break;
case ELFLOADER_NO_SYMTAB:
print = "No symbol table";
break;
case ELFLOADER_NO_STRTAB:
print = "No string table";
break;
case ELFLOADER_NO_TEXT:
print = "No text segment";
break;
case ELFLOADER_SYMBOL_NOT_FOUND:
print = "Symbol not found: ";
symbol = elfloader_unknown;
break;
case ELFLOADER_SEGMENT_NOT_FOUND:
print = "Segment not found: ";
symbol = elfloader_unknown;
break;
case ELFLOADER_NO_STARTPOINT:
print = "No starting point";
break;
default:
print = "Unknown return code from the ELF loader (internal bug)";
break;
}
shell_output_str(&exec_command, print, symbol);
if(ret == ELFLOADER_OK) {
int i;
for(i = 0; elfloader_autostart_processes[i] != NULL; ++i) {
shell_output_str(&exec_command, "exec: starting process ",
elfloader_autostart_processes[i]->name);
}
autostart_start(elfloader_autostart_processes);
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
void
shell_exec_init(void)
{
elfloader_init();
shell_register_command(&exec_command);
}
/*---------------------------------------------------------------------------*/