96 lines
2.0 KiB
C++
96 lines
2.0 KiB
C++
/*
|
|
* \brief Process environment utility
|
|
* \author Norman Feske
|
|
* \date 2011-02-17
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2011-2012 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
/* Genode includes */
|
|
#include <util/string.h>
|
|
#include <util/arg_string.h>
|
|
#include <os/attached_ram_dataspace.h>
|
|
#include <base/printf.h>
|
|
|
|
/* Noux includes */
|
|
#include <path.h>
|
|
#include <pwd.h>
|
|
#include <range_checked_index.h>
|
|
|
|
namespace Noux {
|
|
|
|
/**
|
|
* Front-end for PWD environment variable
|
|
*/
|
|
class Environment : private Genode::Attached_ram_dataspace,
|
|
public Pwd
|
|
{
|
|
private:
|
|
|
|
enum { ENV_DS_SIZE = 4096 };
|
|
|
|
char *_env;
|
|
|
|
Pwd::Path _pwd_path;
|
|
|
|
public:
|
|
|
|
/**
|
|
* \param env comma-separated list of environment variables
|
|
*/
|
|
Environment(char const *env) :
|
|
Genode::Attached_ram_dataspace(Genode::env()->ram_session(),
|
|
ENV_DS_SIZE),
|
|
_env(local_addr<char>())
|
|
{
|
|
Genode::strncpy(_env, env, ENV_DS_SIZE);
|
|
}
|
|
|
|
using Genode::Attached_ram_dataspace::cap;
|
|
|
|
/**
|
|
* Return list of environment variables as comma-separated list
|
|
*/
|
|
char const *env() { return _env; }
|
|
|
|
|
|
/*******************
|
|
** Pwd interface **
|
|
*******************/
|
|
|
|
char const *pwd() { return _pwd_path.base(); }
|
|
|
|
void pwd(char const *pwd)
|
|
{
|
|
_pwd_path.import(pwd);
|
|
_pwd_path.remove_trailing('/');
|
|
|
|
char quoted[Sysio::MAX_PATH_LEN];
|
|
Range_checked_index<unsigned> i(0, sizeof(quoted));
|
|
|
|
try {
|
|
char const *s = _pwd_path.base();
|
|
quoted[i++] = '"';
|
|
while (*s) {
|
|
if (*s == '"')
|
|
quoted[i++] = '/';
|
|
quoted[i++] = *s++;
|
|
}
|
|
quoted[i++] = '"';
|
|
quoted[i] = 0;
|
|
} catch (Index_out_of_range) {
|
|
PERR("Could not set PWD, buffer too small");
|
|
return;
|
|
}
|
|
|
|
Genode::Arg_string::set_arg(_env, ENV_DS_SIZE, "PWD", quoted);
|
|
PINF("changed current work directory to %s", _pwd_path.base());
|
|
}
|
|
};
|
|
}
|