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pathsearch.h
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1996-09-28
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/* pathsearch.h: generic path searching.
Copyright (C) 1993, 94 Karl Berry.
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 2, 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 KPATHSEA_PATHSEARCH_H
#define KPATHSEA_PATHSEARCH_H
#include <kpathsea/c-proto.h>
#include <kpathsea/str-llist.h>
#include <kpathsea/types.h>
/* If PATH is non-null, return its first element (as defined by
IS_ENV_SEP). If it's NULL, return the next element in the previous
path, a la strtok. Leading, trailing, or doubled colons result in
the empty string. When at the end of PATH, return NULL. In any
case, return a pointer to an area that may be overwritten on
subsequent calls. */
extern string kpse_path_element P1H(const_string path);
/* Given a path element ELT, return a pointer to a NULL-terminated list
of the corresponding (existing) directory or directories, with
trailing slashes, or NULL. If ELT is the empty string, check the
current working directory. */
extern str_llist_type *kpse_element_dirs P1H(const_string elt);
/* Expand any leading ~ and variable references in NAME. If the result
is an absolute or explicitly relative filename, check whether it is a
readable (regular) file.
Otherwise, look in each of the directories specified in PATH (also do
tilde and variable expansion on elements in PATH), using a prebuilt
db (see db.h) if it's relevant for a given path element.
If the prebuilt db doesn't exist, or if MUST_EXIST is true and NAME
isn't found in the prebuilt db, look on the filesystem. (I.e., if
MUST_EXIST is false, and NAME isn't found in the db, do *not* look on
the filesystem.)
In any case, return the complete filename if it was found, otherwise
NULL. */
extern string kpse_path_search P3H(const_string path, const_string name,
boolean must_exist);
/* Like `kpse_path_search' with MUST_EXIST true, but return a list of
all the filenames (or NULL if none), instead of taking the first. */
extern string *kpse_all_path_search P2H(const_string path, const_string name);
#endif /* not KPATHSEA_PATHSEARCH_H */