char * interactive_expand_path(char *path)
{
ExpandFile *ef = NULL;
FileExpansion *fe = NULL;
char *ret = NULL;
ef = new_ExpandFile();
if (!ef)
return NULL;
fe = ef_expand_file(ef, path, strlen(path));
if (!fe)
return NULL;
if (fe->nfile <= 0)
return NULL;
ret = strdup(fe->files[0]);
del_ExpandFile(ef);
return ret;
}
/*.......................................................................
* Create the resources needed to expand filenames.
*
* Output:
* return ExpandFile * The new object, or NULL on error.
*/
ExpandFile *new_ExpandFile(void)
{
ExpandFile *ef; /* The object to be returned */
/*
* Allocate the container.
*/
ef = (ExpandFile *) malloc(sizeof(ExpandFile));
if(!ef) {
fprintf(stderr, "new_ExpandFile: Insufficient memory.\n");
return NULL;
};
/*
* Before attempting any operation that might fail, initialize the
* container at least up to the point at which it can safely be passed
* to del_ExpandFile().
*/
ef->sg = NULL;
ef->cache.mem = NULL;
ef->cache.head = NULL;
ef->cache.next = NULL;
ef->cache.tail = NULL;
ef->path = NULL;
ef->home = NULL;
ef->result.files = NULL;
ef->result.nfile = 0;
ef->usrnam[0] = '\0';
ef->envnam[0] = '\0';
ef->errmsg[0] = '\0';
/*
* Allocate a list of string segments for storing filenames.
*/
ef->sg = _new_StringGroup(_pu_pathname_dim());
if(!ef->sg)
return del_ExpandFile(ef);
/*
* Allocate a freelist for allocating directory cache nodes.
*/
ef->cache.mem = _new_FreeList("new_ExpandFile", sizeof(DirNode), DIR_CACHE_BLK);
if(!ef->cache.mem)
return del_ExpandFile(ef);
/*
* Allocate a pathname buffer.
*/
ef->path = _new_PathName();
if(!ef->path)
return del_ExpandFile(ef);
/*
* Allocate an object for looking up home-directories.
*/
ef->home = _new_HomeDir();
if(!ef->home)
return del_ExpandFile(ef);
/*
* Allocate an array for files. This will be extended later if needed.
*/
ef->files_dim = MATCH_BLK_FACT;
ef->result.files = (char **) malloc(sizeof(ef->result.files[0]) *
ef->files_dim);
if(!ef->result.files) {
fprintf(stderr,
"new_ExpandFile: Insufficient memory to allocate array of files.\n");
return del_ExpandFile(ef);
};
return ef;
}
