Lists all the module names on a stream.
The I_LIST operation lists all of the modules present on a stream, including the topmost driver name. If the value of the arg parameter is null, the I_LIST operation returns the number of modules on the stream pointed to by the fildes parameter. If the value of the arg parameter is nonnull, it points to an str_list structure that contains the following elements:
int sl_nmods;
struct str_mlist *sl_modlist;The str_mlist structure contains the following element:
char l_name[FMNAMESZ+1];The fields are defined as follows:
| Field | Description |
|---|---|
| sl_nmods | Specifies the number of entries the user has allocated in the array. |
| sl_modlist | Contains the list of module names (on return). |
This operation is part of STREAMS Kernel Extensions.
If unsuccessful, the errno global variable is set to one of the following values:
| Value | Description |
|---|---|
| EAGAIN | Unable to allocate buffers. |
| EINVAL | The sl_nmods member is less than 1. |