ERR_PERROR
errmsg(ERR_PERROR,
errmsg(ERR_PERROR, "%s: ", file);
if (flags & ERR_PERROR) {
errmsg(ERR_FATAL + ERR_PERROR, "failed to open %s:", file);
errmsg(ERR_PERROR, "cannot canonicalize %s:", dir);
errmsg(ERR_PERROR, "cannot fork process:");
errmsg(ERR_PERROR, "cannot execute %s:", cmd_path);
errmsg(ERR_PERROR, "waitpid error:");