/* Expand all special constructs in a path, and include only the actually
existing directories in the result. */
string
kpse_path_expand P1C(const_string, path)
{
string ret;
string xpath;
string elt;
unsigned len;
/* Initialise ret to the empty string. */
ret = (string)xmalloc (1);
*ret = 0;
len = 0;
/* Expand variables and braces first. */
xpath = kpse_brace_expand (path);
/* Now expand each of the path elements, printing the results */
for (elt = kpse_path_element (xpath); elt; elt = kpse_path_element (NULL)) {
str_llist_type *dirs;
/* Skip and ignore magic leading chars. */
if (*elt == '!' && *(elt + 1) == '!')
elt += 2;
/* Search the disk for all dirs in the component specified.
Be faster to check the database, but this is more reliable. */
dirs = kpse_element_dirs (elt);
if (dirs && *dirs) {
str_llist_elt_type *dir;
for (dir = *dirs; dir; dir = STR_LLIST_NEXT (*dir)) {
string thedir = STR_LLIST (*dir);
unsigned dirlen = strlen (thedir);
string save_ret = ret;
/* We need to retain trailing slash if that's the root directory.
* On unix, "/" is root dir, "" often taken to be current dir.
* On windows, "C:/" is root dir of drive C, and "C:" is current
* on drive C. There's no need to look at other cases, like UNC
* names.
*/
if (dirlen == 1 || (dirlen == 3 && NAME_BEGINS_WITH_DEVICE (thedir)
&& IS_DIR_SEP (thedir[2]))) {
ret = concat3 (ret, thedir, ENV_SEP_STRING);
len += dirlen + 1;
ret[len - 1] = ENV_SEP;
} else {
ret = concat (ret, thedir);
len += dirlen;
ret [len - 1] = ENV_SEP;
}
free (save_ret);
}
}
}
/* Get rid of trailing ':', if any. */
if (len != 0)
ret[len - 1] = 0;
return ret;
}
void
print_element_dirs (const_string elt)
{
str_llist_type *dirs;
printf ("Directories of %s:\t", elt ? elt : "(nil)");
fflush (stdout);
dirs = kpse_element_dirs (elt);
if (!dirs)
printf ("(nil)");
else
{
str_llist_elt_type *dir;
for (dir = *dirs; dir; dir = STR_LLIST_NEXT (*dir))
{
string d = STR_LLIST (*dir);
printf ("%s ", *d ? d : "`'");
}
}
putchar ('\n');
}
search_list P4C(const_string, path, const_string*, names,
boolean, must_exist, boolean, all)
{
str_list_type ret_list;
const_string* namep;
string elt;
boolean done = false;
#ifdef __DJGPP__
/* We will use `stat' heavily, so let's request for
the fastest possible version of `stat', by telling
it what members of struct stat do we really need.
We need to set this on each call because this is a
library function; the caller might need other options
from `stat'. Thus save the flags and restore them
before exit.
This call tells `stat' that we do NOT need to recognize
executable files (neither by an extension nor by a magic
signature); that we do NOT need time stamp of root directories;
and that we do NOT need the write access bit in st_mode.
Note that `kpse_set_progname' needs the EXEC bits,
but it was already called by the time we get here. */
unsigned short save_djgpp_flags = _djstat_flags;
_djstat_flags = _STAT_EXEC_MAGIC | _STAT_EXEC_EXT
| _STAT_ROOT_TIME | _STAT_WRITEBIT;
#endif
ret_list = str_list_init();
if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) {
DEBUGF1 ("start search(files=[%s", *names);
for (namep = names+1; *namep != NULL; namep++) {
fputc(' ', stderr);
fputs(*namep, stderr);
}
fprintf (stderr, "], must_exist=%d, find_all=%d, path=%s).\n",
must_exist, all, path);
}
/* No need to do any expansion on names. */
for (namep = names; *namep; namep++) {
if (kpse_absolute_p(*namep, true) && kpse_readable_file(*namep)) {
str_list_add(&ret_list, xstrdup(*namep));
/* I know, I know... */
goto out;
}
}
/* Look at each path element in turn. */
for (elt = kpse_path_element (path); !done && elt;
elt = kpse_path_element (NULL))
{
str_list_type *found;
boolean allow_disk_search = true;
if (elt[0] == '!' && elt[1] == '!') {
/* !! magic -> disallow disk searches. */
allow_disk_search = false;
elt += 2;
}
/* See elt-dirs.c for side effects of this function. */
kpse_normalize_path(elt);
/* Try ls-R, unless we're searching for texmf.cnf. */
found = first_search ? NULL : kpse_db_search_list(names, elt, all);
/* Search the filesystem if (1) the path spec allows it, and either
(2a) we are searching for texmf.cnf ; or
(2b) no db exists; or
(2c) no db's are relevant to this elt; or
(3) MUST_EXIST && NAME was not in the db.
In (2*), `found' will be NULL.
In (3), `found' will be an empty list. */
if (allow_disk_search && (!found || (must_exist && !STR_LIST(*found)))) {
str_llist_type *dirs = kpse_element_dirs (elt);
if (dirs && *dirs) {
if (!found)
found = XTALLOC1 (str_list_type);
*found = dir_list_search_list (dirs, names, all);
}
}
/* Did we find anything? */
if (found && STR_LIST (*found)) {
if (all) {
str_list_concat (&ret_list, *found);
} else {
str_list_add (&ret_list, STR_LIST_ELT (*found, 0));
done = true;
}
}
}
out:
if (STR_LIST_LENGTH (ret_list) == 0
|| (all && STR_LIST_LAST_ELT (ret_list) != NULL))
str_list_add (&ret_list, NULL);
if (first_search) {
first_search = false;
} else {
/* Record the filenames we found, if desired. And wrap them in a
debugging line if we're doing that. */
if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) {
DEBUGF1 ("search([%s", *names);
for (namep = names+1; *namep != NULL; namep++) {
fputc(' ', stderr);
fputs(*namep, stderr);
}
fputs ("]) =>", stderr);
}
log_search (ret_list);
if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH))
putc ('\n', stderr);
}
#ifdef __DJGPP__
/* Undo any side effects. */
_djstat_flags = save_djgpp_flags;
#endif
return STR_LIST (ret_list);
}
static str_list_type
path_search P4C(const_string, path, string, name,
boolean, must_exist, boolean, all)
{
string elt;
str_list_type ret_list;
boolean done = false;
ret_list = str_list_init (); /* some compilers lack struct initialization */
for (elt = kpse_path_element (path); !done && elt;
elt = kpse_path_element (NULL)) {
str_list_type *found;
boolean allow_disk_search = true;
if (*elt == '!' && *(elt + 1) == '!') {
/* Those magic leading chars in a path element means don't search the
disk for this elt. And move past the magic to get to the name. */
allow_disk_search = false;
elt += 2;
}
/* See elt-dirs.c for side effects of this function */
kpse_normalize_path(elt);
/* Try ls-R, unless we're searching for texmf.cnf. Our caller
(search), also tests first_search, and does the resetting. */
found = first_search ? NULL : kpse_db_search (name, elt, all);
/* Search the filesystem if (1) the path spec allows it, and either
(2a) we are searching for texmf.cnf ; or
(2b) no db exists; or
(2c) no db's are relevant to this elt; or
(3) MUST_EXIST && NAME was not in the db.
In (2*), `found' will be NULL.
In (3), `found' will be an empty list. */
if (allow_disk_search && (!found || (must_exist && !STR_LIST (*found)))) {
str_llist_type *dirs = kpse_element_dirs (elt);
if (dirs && *dirs) {
if (!found)
found = XTALLOC1 (str_list_type);
*found = dir_list_search (dirs, name, all);
}
}
/* Did we find anything anywhere? */
if (found && STR_LIST (*found))
if (all)
str_list_concat (&ret_list, *found);
else {
str_list_add (&ret_list, STR_LIST_ELT (*found, 0));
done = true;
}
/* Free the list space, if any (but not the elements). */
if (found) {
str_list_free (found);
free (found);
}
}
/* Free the expanded name we were passed. It can't be in the return
list, since the path directories got unconditionally prepended. */
free (name);
return ret_list;
}
