+struct foreach_state {
+ const char *name;
+ struct upkg *f;
+ size_t sz;
+ char buf[];
+};
+
+static int foreachfile(const char *filename, void *_st)
+{
+ struct foreach_state **st = _st, *tmp;
+ size_t need, len;
+ const char *base;
+
+ /* Check if the filename matches the package name. */
+ base = pkgname_base(filename);
+ if (!base || strcasecmp(base, (*st)->name) != 0)
+ return 0;
+
+ /* Enlarge the state buffer, if necessary. */
+ need = strlen(filename) + sizeof **u_pkg_exts;
+ if ((*st)->sz < need) {
+ tmp = realloc(*st, sizeof **st + need);
+ if (!tmp)
+ return -1;
+ *st = tmp;
+ (*st)->sz = need;
+ }
+
+ /* Try each file extension, in order. */
+ len = sprintf((*st)->buf, "%s", filename);
+ for (unsigned i = 0; i < sizeof u_pkg_exts / sizeof *u_pkg_exts; i++) {
+ strcpy((*st)->buf+len, u_pkg_exts[i]);
+
+ (*st)->f = upkg_fopen((*st)->buf);
+ if ((*st)->f != NULL)
+ return 1;
+ }
+
+ return 0;
+}
+
+struct upkg *u_pkg_vfs_open_by_name(const char *name)