int Shell::execute(char *command)
{
char *argv[MAX_ARGV];
char tmp[128];
ShellCommand *cmd;
Size argc;
int pid, status;
/* Valid argument? */
if (!strlen(command))
{
return EXIT_SUCCESS;
}
/* Attempt to extract arguments. */
argc = parse(command, argv, MAX_ARGV);
/* Ignore comments */
if (argv[0][0] == '#')
return EXIT_SUCCESS;
/* Do we have a matching ShellCommand? */
if (!(cmd = ShellCommand::byName(argv[0])))
{
/* If not, try to execute it as a file directly. */
if ((pid = forkexec(argv[0], (const char **) argv)) != -1)
{
waitpid(pid, &status, 0);
return status;
}
/* Try to find it on the livecd filesystem. (temporary hardcoded PATH) */
else if (snprintf(tmp, sizeof(tmp), "/bin/%s", argv[0]) &&
(pid = forkexec(tmp, (const char **) argv)) != -1)
{
waitpid(pid, &status, 0);
return status;
}
else
printf("forkexec '%s' failed: %s\r\n", argv[0],
strerror(errno));
}
/* Enough arguments given? */
else if (argc - 1 < cmd->getMinimumParams())
{
printf("%s: not enough arguments (%u required)\r\n",
cmd->getName(), cmd->getMinimumParams());
}
/* Execute it. */
else
{
return cmd->execute(argc - 1, argv + 1);
}
/* Not successful. */
return EXIT_FAILURE;
}
void Shell::start() {
std::string commandWithArgs;
out << PROMPT;
while(std::getline(in, commandWithArgs, '\n')) {
if (!commandWithArgs.empty() && !isSpaces(commandWithArgs)) {
ShellCommand* cmd = commands[getCommandName(commandWithArgs)];
if (cmd == NULL) {
out << "command not found" << std::endl;
} else {
cmd->run(commandWithArgs);
if (cmd->getName() == "quit") {
break;
}
}
}
out << PROMPT;
}
}