static struct lttcomm_session_msg lsm;
static struct lttcomm_lttng_msg llm;
-/* Prototypes */
-static int check_tracing_group(const char *grp_name);
-static int ask_sessiond(enum lttcomm_sessiond_command lct, void **buf);
-static int recv_data_sessiond(void *buf, size_t len);
-static int send_data_sessiond(void);
-static int set_session_daemon_path(void);
-
/* Variables */
static char *tracing_group;
static int connected;
}
ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len);
- if (ret < 0) {
- goto end;
- }
end:
return ret;
/*
* ask_sessiond
*
- * Ask the session daemon a specific command
- * and put the data into buf.
+ * Ask the session daemon a specific command and put the data into buf.
*
* Return size of data (only payload, not header).
*/
/* Get payload data */
ret = recv_data_sessiond(data, size);
if (ret < 0) {
+ free(data);
goto end;
}
return ret;
}
+/*
+ * check_tracing_group
+ *
+ * Check if the specified group name exist.
+ * If yes, 0, else -1
+ */
+static int check_tracing_group(const char *grp_name)
+{
+ struct group *grp_tracing; /* no free(). See getgrnam(3) */
+ gid_t *grp_list;
+ int grp_list_size, grp_id, i;
+ int ret = -1;
+
+ /* Get GID of group 'tracing' */
+ grp_tracing = getgrnam(grp_name);
+ if (grp_tracing == NULL) {
+ /* NULL means not found also. getgrnam(3) */
+ if (errno != 0) {
+ perror("getgrnam");
+ }
+ goto end;
+ }
+
+ /* Get number of supplementary group IDs */
+ grp_list_size = getgroups(0, NULL);
+ if (grp_list_size < 0) {
+ perror("getgroups");
+ goto end;
+ }
+
+ /* Alloc group list of the right size */
+ grp_list = malloc(grp_list_size * sizeof(gid_t));
+ grp_id = getgroups(grp_list_size, grp_list);
+ if (grp_id < -1) {
+ perror("getgroups");
+ goto free_list;
+ }
+
+ for (i = 0; i < grp_list_size; i++) {
+ if (grp_list[i] == grp_tracing->gr_gid) {
+ ret = 0;
+ break;
+ }
+ }
+
+free_list:
+ free(grp_list);
+
+end:
+ return ret;
+}
+
+/*
+ * set_session_daemon_path
+ *
+ * Set sessiond socket path by putting it in
+ * the global sessiond_sock_path variable.
+ */
+static int set_session_daemon_path(void)
+{
+ int ret;
+
+ /* Are we in the tracing group ? */
+ ret = check_tracing_group(tracing_group);
+ if (ret < 0 && getuid() != 0) {
+ if (sprintf(sessiond_sock_path, DEFAULT_HOME_CLIENT_UNIX_SOCK,
+ getenv("HOME")) < 0) {
+ return -ENOMEM;
+ }
+ } else {
+ strncpy(sessiond_sock_path, DEFAULT_GLOBAL_CLIENT_UNIX_SOCK,
+ sizeof(DEFAULT_GLOBAL_CLIENT_UNIX_SOCK));
+ }
+
+ return 0;
+}
+
/*
* BEGIN KERNEL CONTROL
*/
*/
int lttng_ust_start_trace(pid_t pid)
{
- int ret;
-
lsm.pid = pid;
- ret = ask_sessiond(UST_START_TRACE, NULL);
-
- return ret;
+ return ask_sessiond(UST_START_TRACE, NULL);
}
/*
*/
int lttng_ust_stop_trace(pid_t pid)
{
- int ret;
-
lsm.pid = pid;
- ret = ask_sessiond(UST_STOP_TRACE, NULL);
-
- return ret;
+ return ask_sessiond(UST_STOP_TRACE, NULL);
}
/*
*/
int lttng_ust_create_trace(pid_t pid)
{
- int ret;
-
lsm.pid = pid;
- ret = ask_sessiond(UST_CREATE_TRACE, NULL);
-
- return ret;
+ return ask_sessiond(UST_CREATE_TRACE, NULL);
}
/*
* lttng_ust_list_apps
*
- * Ask the session daemon for all UST traceable
- * applications.
+ * Ask the session daemon for all UST traceable applications.
*
* Return the number of pids.
* On error, return negative value.
/*
* lttng_list_traces
*
- * Ask the session daemon for all traces (kernel and ust)
- * for the session identified by uuid.
+ * Ask the session daemon for all traces (kernel and ust) for the session
+ * identified by uuid.
*
* Return the number of traces.
+ * On error, return negative value.
*/
int lttng_list_traces(uuid_t *uuid, struct lttng_trace **traces)
{
*/
int lttng_create_session(char *name)
{
- int ret;
-
- strncpy(lsm.session_name, name, sizeof(lsm.session_name));
- lsm.session_name[sizeof(lsm.session_name) - 1] = '\0';
-
- ret = ask_sessiond(LTTNG_CREATE_SESSION, NULL);
- if (ret < 0) {
- goto end;
- }
-
-end:
- return ret;
+ strncpy(lsm.session_name, name, NAME_MAX);
+ return ask_sessiond(LTTNG_CREATE_SESSION, NULL);
}
/*
*/
int lttng_destroy_session(uuid_t *uuid)
{
- int ret;
-
uuid_copy(lsm.session_uuid, *uuid);
-
- ret = ask_sessiond(LTTNG_DESTROY_SESSION, NULL);
- if (ret < 0) {
- goto end;
- }
-
-end:
- return ret;
+ return ask_sessiond(LTTNG_DESTROY_SESSION, NULL);
}
/*
/*
* lttng_check_session_daemon
*
- * Return 0 if a sesssion daemon is available
- * else return -1
+ * Yes, return 1
+ * No, return 0
+ * Error, return negative value
*/
-int lttng_check_session_daemon(void)
+int lttng_session_daemon_alive(void)
{
int ret;
ret = set_session_daemon_path();
if (ret < 0) {
+ /* Error */
return ret;
}
/* If socket exist, we consider the daemon started */
ret = access(sessiond_sock_path, F_OK);
if (ret < 0) {
- return ret;
- }
-
- return 0;
-}
-
-/*
- * set_session_daemon_path
- *
- * Set sessiond socket path by putting it in
- * the global sessiond_sock_path variable.
- */
-static int set_session_daemon_path(void)
-{
- int ret;
-
- /* Are we in the tracing group ? */
- ret = check_tracing_group(tracing_group);
- if (ret < 0 && getuid() != 0) {
- if (sprintf(sessiond_sock_path, DEFAULT_HOME_CLIENT_UNIX_SOCK,
- getenv("HOME")) < 0) {
- return -ENOMEM;
- }
- } else {
- strncpy(sessiond_sock_path, DEFAULT_GLOBAL_CLIENT_UNIX_SOCK,
- sizeof(DEFAULT_GLOBAL_CLIENT_UNIX_SOCK));
+ /* Not alive */
+ return 0;
}
- return 0;
-}
-
-/*
- * check_tracing_group
- *
- * Check if the specified group name exist.
- * If yes, 0, else -1
- */
-static int check_tracing_group(const char *grp_name)
-{
- struct group *grp_tracing; /* no free(). See getgrnam(3) */
- gid_t *grp_list;
- int grp_list_size, grp_id, i;
- int ret = -1;
-
- /* Get GID of group 'tracing' */
- grp_tracing = getgrnam(grp_name);
- if (grp_tracing == NULL) {
- /* NULL means not found also. getgrnam(3) */
- if (errno != 0) {
- perror("getgrnam");
- }
- goto end;
- }
-
- /* Get number of supplementary group IDs */
- grp_list_size = getgroups(0, NULL);
- if (grp_list_size < 0) {
- perror("getgroups");
- goto end;
- }
-
- /* Alloc group list of the right size */
- grp_list = malloc(grp_list_size * sizeof(gid_t));
- grp_id = getgroups(grp_list_size, grp_list);
- if (grp_id < -1) {
- perror("getgroups");
- goto free_list;
- }
-
- for (i = 0; i < grp_list_size; i++) {
- if (grp_list[i] == grp_tracing->gr_gid) {
- ret = 0;
- break;
- }
- }
-
-free_list:
- free(grp_list);
-
-end:
- return ret;
+ /* Is alive */
+ return 1;
}
/*
projects / lttng-tools.git / blobdiff