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dmeventd: fifo init and close cleanup

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Use structure initialization for easier to read code.
Close only descriptors >= 0.
This commit is contained in:
Zdenek Kabelac 2013-11-28 12:21:06 +01:00
parent fc9d4dd11f
commit 6dae237303
2 changed files with 31 additions and 25 deletions
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8
daemons/dmeventd/dmeventd.c
View File

@ -1826,7 +1826,13 @@ static void _daemonize(void)
static void restart(void)
{
struct dm_event_fifos fifos = { 0 };
struct dm_event_fifos fifos = {
.server = -1,
.client = -1,
/* FIXME Make these either configurable or depend directly on dmeventd_path */
.client_path = DM_EVENT_FIFO_CLIENT,
.server_path = DM_EVENT_FIFO_SERVER
};
struct dm_event_daemon_message msg = { 0 };
int i, count = 0;
char *message;

48
daemons/dmeventd/libdevmapper-event.c
View File

@ -468,10 +468,6 @@ int init_fifos(struct dm_event_fifos *fifos)
/* FIXME? Is fifo the most suitable method? Why not share
comms/daemon code with something else e.g. multipath? */
/* FIXME Make these either configurable or depend directly on dmeventd_path */
fifos->client_path = DM_EVENT_FIFO_CLIENT;
fifos->server_path = DM_EVENT_FIFO_SERVER;
/* Open the fifo used to read from the daemon. */
if ((fifos->server = open(fifos->server_path, O_RDWR)) < 0) {
log_sys_error("open", fifos->server_path);
@ -481,32 +477,27 @@ int init_fifos(struct dm_event_fifos *fifos)
/* Lock out anyone else trying to do communication with the daemon. */
if (flock(fifos->server, LOCK_EX) < 0) {
log_sys_error("flock", fifos->server_path);
if (close(fifos->server))
log_sys_error("close", fifos->server_path);
return 0;
goto bad;
}
/* if ((fifos->client = open(fifos->client_path, O_WRONLY | O_NONBLOCK)) < 0) {*/
if ((fifos->client = open(fifos->client_path, O_RDWR | O_NONBLOCK)) < 0) {
log_sys_error("open", fifos->client_path);
if (close(fifos->server))
log_sys_error("close", fifos->server_path);
return 0;
goto bad;
}
return 1;
bad:
if (close(fifos->server))
log_sys_debug("close", fifos->server_path);
fifos->server = -1;
return 0;
}
/* Initialize client. */
static int _init_client(char *dmeventd_path, struct dm_event_fifos *fifos)
{
/* init fifos */
memset(fifos, 0, sizeof(*fifos));
/* FIXME Make these either configurable or depend directly on dmeventd_path */
fifos->client_path = DM_EVENT_FIFO_CLIENT;
fifos->server_path = DM_EVENT_FIFO_SERVER;
if (!_start_daemon(dmeventd_path, fifos))
return_0;
@ -515,13 +506,16 @@ static int _init_client(char *dmeventd_path, struct dm_event_fifos *fifos)
void fini_fifos(struct dm_event_fifos *fifos)
{
if (flock(fifos->server, LOCK_UN))
log_error("flock unlock %s", fifos->server_path);
if (close(fifos->client))
if (fifos->client >= 0 && close(fifos->client))
log_sys_error("close", fifos->client_path);
if (close(fifos->server))
log_sys_error("close", fifos->server_path);
if (fifos->server >= 0) {
if (flock(fifos->server, LOCK_UN))
log_sys_error("flock unlock", fifos->server_path);
if (close(fifos->server))
log_sys_error("close", fifos->server_path);
}
}
/* Get uuid of a device */
@ -585,7 +579,13 @@ static int _do_event(int cmd, char *dmeventd_path, struct dm_event_daemon_messag
enum dm_event_mask evmask, uint32_t timeout)
{
int ret;
struct dm_event_fifos fifos;
struct dm_event_fifos fifos = {
.server = -1,
.client = -1,
/* FIXME Make these either configurable or depend directly on dmeventd_path */
.client_path = DM_EVENT_FIFO_CLIENT,
.server_path = DM_EVENT_FIFO_SERVER
};
if (!_init_client(dmeventd_path, &fifos)) {
stack;