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/*
# pathsrch.h: environment-variable path searching for files, possibly
# in subdirectories.
#
# Copyright (C) 1992, 2011 Free Software Foundation, Inc.
#
# This program 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 3 of the License, or
# (at your option) any later version.
#
# This program 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 <http://www.gnu.org/licenses/>.
#
*/
#ifndef PATHSEARCH_H
#define PATHSEARCH_H
#include "types.h"
/* Look for FILENAME in each of the directories given in the DIR_LIST
array. (Unless DIR_LIST is null, or FILENAME is absolute or
explicitly relative, in which case we just look at FILENAME.) Return
the complete pathname of the first readable file found, or NULL. */
extern string find_path_filename P2H(string filename, string *dir_list);
/* Return a NULL-terminated array of all the directory names in the
value of the environment variable ENV_NAME (or DEFAULT_PATH if it is
not set). Each directory in the list ends with the directory separator,
e.g., `/'.
A leading or trailing path separator (e.g., `:') in the value of
ENV_NAME is replaced by DEFAULT_PATH.
If any element of the path ends with a double directory separator
(e.g., `foo//'), it is replaced by all its subdirectories. */
extern string *initialize_path_list P2H(string env_name, string default_path);
/* Replace a leading or trailing `:' in ENV_PATH with DEFAULT_PATH. If
neither is present, return ENV_PATH if that is non-null, else
DEFAULT_PATH. */
extern string expand_default P2H(string env_path, string default_path);
/* Replace a leading ~ or ~name in FILENAME with getenv ("HOME") or
name's home directory. */
extern string expand_tilde P1H(string filename);
#endif /* not PATHSEARCH_H */
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