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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, 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#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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