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/*
* libdpkg - Debian packaging suite library routines
* fsys-dir.c - filesystem root directory functions
*
* Copyright © 2011, 2018 Guillem Jover <guillem@debian.org>
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <compat.h>
#include <stdlib.h>
#include <dpkg/dpkg.h>
#include <dpkg/string.h>
#include <dpkg/path.h>
#include <dpkg/fsys.h>
static const char *fsys_dir = "";
/**
* Set current on-disk filesystem root directory.
*
* The directory is initially set to "", this function can be used to
* set the directory to a new value, or to set it to a default value if dir
* is NULL. For the latter the order is, value from environment variable
* DPKG_ROOT, and then the built-in default "",
*
* @param dir The new filesystem root directory, or NULL to set to default.
*
* @return The new filesystem root directory.
*/
const char *
dpkg_fsys_set_dir(const char *dir)
{
char *new_dir;
if (dir == NULL) {
const char *env;
env = getenv("DPKG_ROOT");
if (env)
dir = env;
else
dir = "";
}
new_dir = m_strdup(dir);
path_trim_slash_slashdot(new_dir);
fsys_dir = new_dir;
return fsys_dir;
}
/**
* Get current on-disk filesystem root directory.
*
* @return The current filesystem root directory.
*/
const char *
dpkg_fsys_get_dir(void)
{
return fsys_dir;
}
/**
* Get a pathname to the current on-disk filesystem root directory.
*
* This function returns an allocated string, which should be freed with
* free(2).
*
* @param pathpart The pathpart to append to the new pathname.
*
* @return The newly allocated pathname.
*/
char *
dpkg_fsys_get_path(const char *pathpart)
{
return str_fmt("%s/%s", fsys_dir, pathpart);
}
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