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Diffstat (limited to 'lib/dpkg/fsys-dir.c')
-rw-r--r-- | lib/dpkg/fsys-dir.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/lib/dpkg/fsys-dir.c b/lib/dpkg/fsys-dir.c new file mode 100644 index 0000000..15335b2 --- /dev/null +++ b/lib/dpkg/fsys-dir.c @@ -0,0 +1,93 @@ +/* + * 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); +} |