Add snapshot output init call that uses URIs
[lttng-tools.git] / src / lib / lttng-ctl / lttng-ctl.c
index 3e532ad60067c6db4a454eb2d4d6b3ab890a6d7e..3863aa1ceb9de16836d4edc6c55d908fd289e08f 100644 (file)
 #include <common/defaults.h>
 #include <common/sessiond-comm/sessiond-comm.h>
 #include <common/uri.h>
+#include <common/utils.h>
 #include <lttng/lttng.h>
 
 #include "filter/filter-ast.h"
 #include "filter/filter-parser.h"
 #include "filter/filter-bytecode.h"
 #include "filter/memstream.h"
+#include "lttng-ctl-helper.h"
 
 #ifdef DEBUG
 static const int print_xml = 1;
@@ -73,141 +75,11 @@ static int connected;
 int lttng_opt_quiet;
 int lttng_opt_verbose;
 
-static void set_default_url_attr(struct lttng_uri *uri,
-               enum lttng_stream_type stype)
-{
-       uri->stype = stype;
-       if (uri->dtype != LTTNG_DST_PATH && uri->port == 0) {
-               uri->port = (stype == LTTNG_STREAM_CONTROL) ?
-                       DEFAULT_NETWORK_CONTROL_PORT : DEFAULT_NETWORK_DATA_PORT;
-       }
-}
-
-/*
- * Parse a string URL and creates URI(s) returning the size of the populated
- * array.
- */
-static ssize_t parse_str_urls_to_uri(const char *ctrl_url, const char *data_url,
-               struct lttng_uri **uris)
-{
-       unsigned int equal = 1, idx = 0;
-       /* Add the "file://" size to the URL maximum size */
-       char url[PATH_MAX + 7];
-       ssize_t size_ctrl = 0, size_data = 0, size;
-       struct lttng_uri *ctrl_uris = NULL, *data_uris = NULL;
-       struct lttng_uri *tmp_uris = NULL;
-
-       /* No URL(s) is allowed. This means that the consumer will be disabled. */
-       if (ctrl_url == NULL && data_url == NULL) {
-               return 0;
-       }
-
-       /* Check if URLs are equal and if so, only use the control URL */
-       if (ctrl_url && data_url) {
-               equal = !strcmp(ctrl_url, data_url);
-       }
-
-       /*
-        * Since we allow the str_url to be a full local filesystem path, we are
-        * going to create a valid file:// URL if it's the case.
-        *
-        * Check if first character is a '/' or else reject the URL.
-        */
-       if (ctrl_url && ctrl_url[0] == '/') {
-               int ret;
-
-               ret = snprintf(url, sizeof(url), "file://%s", ctrl_url);
-               if (ret < 0) {
-                       PERROR("snprintf file url");
-                       goto parse_error;
-               }
-               ctrl_url = url;
-       }
-
-       /* Parse the control URL if there is one */
-       if (ctrl_url) {
-               size_ctrl = uri_parse(ctrl_url, &ctrl_uris);
-               if (size_ctrl < 1) {
-                       ERR("Unable to parse the URL %s", ctrl_url);
-                       goto parse_error;
-               }
-
-               /* At this point, we know there is at least one URI in the array */
-               set_default_url_attr(&ctrl_uris[0], LTTNG_STREAM_CONTROL);
-
-               if (ctrl_uris[0].dtype == LTTNG_DST_PATH && data_url) {
-                       ERR("Can not have a data URL when destination is file://");
-                       goto error;
-               }
-
-               /* URL are not equal but the control URL uses a net:// protocol */
-               if (size_ctrl == 2) {
-                       if (!equal) {
-                               ERR("Control URL uses the net:// protocol and the data URL is "
-                                               "different. Not allowed.");
-                               goto error;
-                       } else {
-                               set_default_url_attr(&ctrl_uris[1], LTTNG_STREAM_DATA);
-                               /*
-                                * The data_url and ctrl_url are equal and the ctrl_url
-                                * contains a net:// protocol so we just skip the data part.
-                                */
-                               data_url = NULL;
-                       }
-               }
-       }
-
-       if (data_url) {
-               /* We have to parse the data URL in this case */
-               size_data = uri_parse(data_url, &data_uris);
-               if (size_data < 1) {
-                       ERR("Unable to parse the URL %s", data_url);
-                       goto error;
-               } else if (size_data == 2) {
-                       ERR("Data URL can not be set with the net[4|6]:// protocol");
-                       goto error;
-               }
-
-               set_default_url_attr(&data_uris[0], LTTNG_STREAM_DATA);
-       }
-
-       /* Compute total size */
-       size = size_ctrl + size_data;
-
-       tmp_uris = zmalloc(sizeof(struct lttng_uri) * size);
-       if (tmp_uris == NULL) {
-               PERROR("zmalloc uris");
-               goto error;
-       }
-
-       if (ctrl_uris) {
-               /* It's possible the control URIs array contains more than one URI */
-               memcpy(tmp_uris, ctrl_uris, sizeof(struct lttng_uri) * size_ctrl);
-               ++idx;
-               free(ctrl_uris);
-       }
-
-       if (data_uris) {
-               memcpy(&tmp_uris[idx], data_uris, sizeof(struct lttng_uri));
-               free(data_uris);
-       }
-
-       *uris = tmp_uris;
-
-       return size;
-
-error:
-       free(ctrl_uris);
-       free(data_uris);
-       free(tmp_uris);
-parse_error:
-       return -1;
-}
-
 /*
  * Copy string from src to dst and enforce null terminated byte.
  */
-static void copy_string(char *dst, const char *src, size_t len)
+LTTNG_HIDDEN
+void lttng_ctl_copy_string(char *dst, const char *src, size_t len)
 {
        if (src && dst) {
                strncpy(dst, src, len);
@@ -223,17 +95,14 @@ static void copy_string(char *dst, const char *src, size_t len)
  *
  * If domain is unknown, default domain will be the kernel.
  */
-static void copy_lttng_domain(struct lttng_domain *dst, struct lttng_domain *src)
+LTTNG_HIDDEN
+void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst,
+               struct lttng_domain *src)
 {
        if (src && dst) {
                switch (src->type) {
                case LTTNG_DOMAIN_KERNEL:
                case LTTNG_DOMAIN_UST:
-               /*
-               case LTTNG_DOMAIN_UST_EXEC_NAME:
-               case LTTNG_DOMAIN_UST_PID:
-               case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN:
-               */
                        memcpy(dst, src, sizeof(struct lttng_domain));
                        break;
                default:
@@ -428,8 +297,8 @@ static int set_session_daemon_path(void)
        }
 
        if ((uid == 0) || in_tgroup) {
-               copy_string(sessiond_sock_path, DEFAULT_GLOBAL_CLIENT_UNIX_SOCK,
-                               sizeof(sessiond_sock_path));
+               lttng_ctl_copy_string(sessiond_sock_path,
+                               DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path));
        }
 
        if (uid != 0) {
@@ -450,7 +319,7 @@ static int set_session_daemon_path(void)
                 * With GNU C >= 2.1, snprintf returns the required size (excluding closing null)
                 */
                ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path),
-                               DEFAULT_HOME_CLIENT_UNIX_SOCK, getenv("HOME"));
+                               DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir());
                if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) {
                        goto error;
                }
@@ -471,6 +340,11 @@ static int connect_sessiond(void)
 {
        int ret;
 
+       /* Don't try to connect if already connected. */
+       if (connected) {
+               return 0;
+       }
+
        ret = set_session_daemon_path();
        if (ret < 0) {
                goto error;
@@ -514,7 +388,8 @@ static int disconnect_sessiond(void)
  *
  * Return size of data (only payload, not header) or a negative error code.
  */
-static int ask_sessiond_varlen(struct lttcomm_session_msg *lsm,
+LTTNG_HIDDEN
+int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm,
                void *vardata, size_t varlen, void **buf)
 {
        int ret;
@@ -591,16 +466,6 @@ end:
        return ret;
 }
 
-/*
- * Ask the session daemon a specific command and put the data into buf.
- *
- * Return size of data (only payload, not header) or a negative error code.
- */
-static int ask_sessiond(struct lttcomm_session_msg *lsm, void **buf)
-{
-       return ask_sessiond_varlen(lsm, NULL, 0, buf);
-}
-
 /*
  * Create lttng handle and return pointer.
  * The returned pointer will be NULL in case of malloc() error.
@@ -621,11 +486,11 @@ struct lttng_handle *lttng_create_handle(const char *session_name,
        }
 
        /* Copy session name */
-       copy_string(handle->session_name, session_name,
+       lttng_ctl_copy_string(handle->session_name, session_name,
                        sizeof(handle->session_name));
 
        /* Copy lttng domain */
-       copy_lttng_domain(&handle->domain, domain);
+       lttng_ctl_copy_lttng_domain(&handle->domain, domain);
 
 end:
        return handle;
@@ -636,9 +501,7 @@ end:
  */
 void lttng_destroy_handle(struct lttng_handle *handle)
 {
-       if (handle) {
-               free(handle);
-       }
+       free(handle);
 }
 
 /*
@@ -655,13 +518,13 @@ int lttng_register_consumer(struct lttng_handle *handle,
        }
 
        lsm.cmd_type = LTTNG_REGISTER_CONSUMER;
-       copy_string(lsm.session.name, handle->session_name,
+       lttng_ctl_copy_string(lsm.session.name, handle->session_name,
                        sizeof(lsm.session.name));
-       copy_lttng_domain(&lsm.domain, &handle->domain);
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
-       copy_string(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path));
+       lttng_ctl_copy_string(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path));
 
-       return ask_sessiond(&lsm, NULL);
+       return lttng_ctl_ask_sessiond(&lsm, NULL);
 }
 
 /*
@@ -678,9 +541,10 @@ int lttng_start_tracing(const char *session_name)
 
        lsm.cmd_type = LTTNG_START_TRACE;
 
-       copy_string(lsm.session.name, session_name, sizeof(lsm.session.name));
+       lttng_ctl_copy_string(lsm.session.name, session_name,
+                       sizeof(lsm.session.name));
 
-       return ask_sessiond(&lsm, NULL);
+       return lttng_ctl_ask_sessiond(&lsm, NULL);
 }
 
 /*
@@ -697,9 +561,10 @@ static int _lttng_stop_tracing(const char *session_name, int wait)
 
        lsm.cmd_type = LTTNG_STOP_TRACE;
 
-       copy_string(lsm.session.name, session_name, sizeof(lsm.session.name));
+       lttng_ctl_copy_string(lsm.session.name, session_name,
+                       sizeof(lsm.session.name));
 
-       ret = ask_sessiond(&lsm, NULL);
+       ret = lttng_ctl_ask_sessiond(&lsm, NULL);
        if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) {
                goto error;
        }
@@ -776,17 +641,17 @@ int lttng_add_context(struct lttng_handle *handle,
        lsm.cmd_type = LTTNG_ADD_CONTEXT;
 
        /* Copy channel name */
-       copy_string(lsm.u.context.channel_name, channel_name,
+       lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name,
                        sizeof(lsm.u.context.channel_name));
 
-       copy_lttng_domain(&lsm.domain, &handle->domain);
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
        memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context));
 
-       copy_string(lsm.session.name, handle->session_name,
+       lttng_ctl_copy_string(lsm.session.name, handle->session_name,
                        sizeof(lsm.session.name));
 
-       return ask_sessiond(&lsm, NULL);
+       return lttng_ctl_ask_sessiond(&lsm, NULL);
 }
 
 /*
@@ -808,14 +673,14 @@ int lttng_enable_event(struct lttng_handle *handle,
 
        /* If no channel name, we put the default name */
        if (channel_name == NULL) {
-               copy_string(lsm.u.enable.channel_name, DEFAULT_CHANNEL_NAME,
+               lttng_ctl_copy_string(lsm.u.enable.channel_name, DEFAULT_CHANNEL_NAME,
                                sizeof(lsm.u.enable.channel_name));
        } else {
-               copy_string(lsm.u.enable.channel_name, channel_name,
+               lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name,
                                sizeof(lsm.u.enable.channel_name));
        }
 
-       copy_lttng_domain(&lsm.domain, &handle->domain);
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
        if (ev->name[0] != '\0') {
                lsm.cmd_type = LTTNG_ENABLE_EVENT;
@@ -824,10 +689,10 @@ int lttng_enable_event(struct lttng_handle *handle,
        }
        memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event));
 
-       copy_string(lsm.session.name, handle->session_name,
+       lttng_ctl_copy_string(lsm.session.name, handle->session_name,
                        sizeof(lsm.session.name));
 
-       return ask_sessiond(&lsm, NULL);
+       return lttng_ctl_ask_sessiond(&lsm, NULL);
 }
 
 /*
@@ -936,7 +801,7 @@ int lttng_enable_event_with_filter(struct lttng_handle *handle,
        lsm.cmd_type = LTTNG_ENABLE_EVENT_WITH_FILTER;
 
        /* Copy channel name */
-       copy_string(lsm.u.enable.channel_name, channel_name,
+       lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name,
                        sizeof(lsm.u.enable.channel_name));
        /* Copy event name */
        if (event) {
@@ -946,12 +811,12 @@ int lttng_enable_event_with_filter(struct lttng_handle *handle,
        lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b)
                        + bytecode_get_len(&ctx->bytecode->b);
 
-       copy_lttng_domain(&lsm.domain, &handle->domain);
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
-       copy_string(lsm.session.name, handle->session_name,
+       lttng_ctl_copy_string(lsm.session.name, handle->session_name,
                        sizeof(lsm.session.name));
 
-       ret = ask_sessiond_varlen(&lsm, &ctx->bytecode->b,
+       ret = lttng_ctl_ask_sessiond_varlen(&lsm, &ctx->bytecode->b,
                                lsm.u.enable.bytecode_len, NULL);
 
        filter_bytecode_free(ctx);
@@ -991,26 +856,27 @@ int lttng_disable_event(struct lttng_handle *handle, const char *name,
        memset(&lsm, 0, sizeof(lsm));
 
        if (channel_name) {
-               copy_string(lsm.u.disable.channel_name, channel_name,
+               lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name,
                                sizeof(lsm.u.disable.channel_name));
        } else {
-               copy_string(lsm.u.disable.channel_name, DEFAULT_CHANNEL_NAME,
+               lttng_ctl_copy_string(lsm.u.disable.channel_name, DEFAULT_CHANNEL_NAME,
                                sizeof(lsm.u.disable.channel_name));
        }
 
-       copy_lttng_domain(&lsm.domain, &handle->domain);
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
        if (name != NULL) {
-               copy_string(lsm.u.disable.name, name, sizeof(lsm.u.disable.name));
+               lttng_ctl_copy_string(lsm.u.disable.name, name,
+                               sizeof(lsm.u.disable.name));
                lsm.cmd_type = LTTNG_DISABLE_EVENT;
        } else {
                lsm.cmd_type = LTTNG_DISABLE_ALL_EVENT;
        }
 
-       copy_string(lsm.session.name, handle->session_name,
+       lttng_ctl_copy_string(lsm.session.name, handle->session_name,
                        sizeof(lsm.session.name));
 
-       return ask_sessiond(&lsm, NULL);
+       return lttng_ctl_ask_sessiond(&lsm, NULL);
 }
 
 /*
@@ -1035,12 +901,12 @@ int lttng_enable_channel(struct lttng_handle *handle,
 
        lsm.cmd_type = LTTNG_ENABLE_CHANNEL;
 
-       copy_lttng_domain(&lsm.domain, &handle->domain);
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
-       copy_string(lsm.session.name, handle->session_name,
+       lttng_ctl_copy_string(lsm.session.name, handle->session_name,
                        sizeof(lsm.session.name));
 
-       return ask_sessiond(&lsm, NULL);
+       return lttng_ctl_ask_sessiond(&lsm, NULL);
 }
 
 /*
@@ -1060,15 +926,15 @@ int lttng_disable_channel(struct lttng_handle *handle, const char *name)
 
        lsm.cmd_type = LTTNG_DISABLE_CHANNEL;
 
-       copy_string(lsm.u.disable.channel_name, name,
+       lttng_ctl_copy_string(lsm.u.disable.channel_name, name,
                        sizeof(lsm.u.disable.channel_name));
 
-       copy_lttng_domain(&lsm.domain, &handle->domain);
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
-       copy_string(lsm.session.name, handle->session_name,
+       lttng_ctl_copy_string(lsm.session.name, handle->session_name,
                        sizeof(lsm.session.name));
 
-       return ask_sessiond(&lsm, NULL);
+       return lttng_ctl_ask_sessiond(&lsm, NULL);
 }
 
 /*
@@ -1088,9 +954,9 @@ int lttng_list_tracepoints(struct lttng_handle *handle,
        }
 
        lsm.cmd_type = LTTNG_LIST_TRACEPOINTS;
-       copy_lttng_domain(&lsm.domain, &handle->domain);
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
-       ret = ask_sessiond(&lsm, (void **) events);
+       ret = lttng_ctl_ask_sessiond(&lsm, (void **) events);
        if (ret < 0) {
                return ret;
        }
@@ -1115,9 +981,9 @@ int lttng_list_tracepoint_fields(struct lttng_handle *handle,
        }
 
        lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS;
-       copy_lttng_domain(&lsm.domain, &handle->domain);
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
-       ret = ask_sessiond(&lsm, (void **) fields);
+       ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields);
        if (ret < 0) {
                return ret;
        }
@@ -1153,18 +1019,18 @@ int lttng_create_session(const char *name, const char *url)
        memset(&lsm, 0, sizeof(lsm));
 
        lsm.cmd_type = LTTNG_CREATE_SESSION;
-       copy_string(lsm.session.name, name, sizeof(lsm.session.name));
+       lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
 
        /* There should never be a data URL */
-       size = parse_str_urls_to_uri(url, NULL, &uris);
+       size = uri_parse_str_urls(url, NULL, &uris);
        if (size < 0) {
                return -LTTNG_ERR_INVALID;
        }
 
        lsm.u.uri.size = size;
 
-       ret = ask_sessiond_varlen(&lsm, uris, sizeof(struct lttng_uri) * size,
-                       NULL);
+       ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris,
+                       sizeof(struct lttng_uri) * size, NULL);
 
        free(uris);
        return ret;
@@ -1184,9 +1050,10 @@ int lttng_destroy_session(const char *session_name)
 
        lsm.cmd_type = LTTNG_DESTROY_SESSION;
 
-       copy_string(lsm.session.name, session_name, sizeof(lsm.session.name));
+       lttng_ctl_copy_string(lsm.session.name, session_name,
+                       sizeof(lsm.session.name));
 
-       return ask_sessiond(&lsm, NULL);
+       return lttng_ctl_ask_sessiond(&lsm, NULL);
 }
 
 /*
@@ -1201,7 +1068,7 @@ int lttng_list_sessions(struct lttng_session **sessions)
        struct lttcomm_session_msg lsm;
 
        lsm.cmd_type = LTTNG_LIST_SESSIONS;
-       ret = ask_sessiond(&lsm, (void**) sessions);
+       ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions);
        if (ret < 0) {
                return ret;
        }
@@ -1227,9 +1094,10 @@ int lttng_list_domains(const char *session_name,
 
        lsm.cmd_type = LTTNG_LIST_DOMAINS;
 
-       copy_string(lsm.session.name, session_name, sizeof(lsm.session.name));
+       lttng_ctl_copy_string(lsm.session.name, session_name,
+                       sizeof(lsm.session.name));
 
-       ret = ask_sessiond(&lsm, (void**) domains);
+       ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains);
        if (ret < 0) {
                return ret;
        }
@@ -1254,12 +1122,12 @@ int lttng_list_channels(struct lttng_handle *handle,
        }
 
        lsm.cmd_type = LTTNG_LIST_CHANNELS;
-       copy_string(lsm.session.name, handle->session_name,
+       lttng_ctl_copy_string(lsm.session.name, handle->session_name,
                        sizeof(lsm.session.name));
 
-       copy_lttng_domain(&lsm.domain, &handle->domain);
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
-       ret = ask_sessiond(&lsm, (void**) channels);
+       ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels);
        if (ret < 0) {
                return ret;
        }
@@ -1285,14 +1153,14 @@ int lttng_list_events(struct lttng_handle *handle,
        }
 
        lsm.cmd_type = LTTNG_LIST_EVENTS;
-       copy_string(lsm.session.name, handle->session_name,
+       lttng_ctl_copy_string(lsm.session.name, handle->session_name,
                        sizeof(lsm.session.name));
-       copy_string(lsm.u.list.channel_name, channel_name,
+       lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name,
                        sizeof(lsm.u.list.channel_name));
 
-       copy_lttng_domain(&lsm.domain, &handle->domain);
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
-       ret = ask_sessiond(&lsm, (void**) events);
+       ret = lttng_ctl_ask_sessiond(&lsm, (void**) events);
        if (ret < 0) {
                return ret;
        }
@@ -1332,11 +1200,11 @@ int lttng_calibrate(struct lttng_handle *handle,
        }
 
        lsm.cmd_type = LTTNG_CALIBRATE;
-       copy_lttng_domain(&lsm.domain, &handle->domain);
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
        memcpy(&lsm.u.calibrate, calibrate, sizeof(lsm.u.calibrate));
 
-       return ask_sessiond(&lsm, NULL);
+       return lttng_ctl_ask_sessiond(&lsm, NULL);
 }
 
 /*
@@ -1353,30 +1221,37 @@ void lttng_channel_set_default_attr(struct lttng_domain *domain,
 
        memset(attr, 0, sizeof(struct lttng_channel_attr));
 
+       /* Same for all domains. */
+       attr->overwrite = DEFAULT_CHANNEL_OVERWRITE;
+       attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE;
+       attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT;
+
        switch (domain->type) {
        case LTTNG_DOMAIN_KERNEL:
-               attr->overwrite = DEFAULT_CHANNEL_OVERWRITE;
-               attr->switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
-               attr->read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
-
+               attr->switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER;
+               attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER;
                attr->subbuf_size = default_get_kernel_channel_subbuf_size();
                attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM;
                attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
                break;
        case LTTNG_DOMAIN_UST:
-#if 0
-       case LTTNG_DOMAIN_UST_EXEC_NAME:
-       case LTTNG_DOMAIN_UST_PID:
-       case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN:
-#endif
-               attr->overwrite = DEFAULT_CHANNEL_OVERWRITE;
-               attr->switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
-               attr->read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
-
-               attr->subbuf_size = default_get_ust_channel_subbuf_size();
-               attr->num_subbuf = DEFAULT_UST_CHANNEL_SUBBUF_NUM;
-               attr->output = DEFAULT_UST_CHANNEL_OUTPUT;
-               break;
+               switch (domain->buf_type) {
+               case LTTNG_BUFFER_PER_UID:
+                       attr->subbuf_size = default_get_ust_uid_channel_subbuf_size();
+                       attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM;
+                       attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT;
+                       attr->switch_timer_interval = DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER;
+                       attr->read_timer_interval = DEFAULT_UST_UID_CHANNEL_READ_TIMER;
+                       break;
+               case LTTNG_BUFFER_PER_PID:
+               default:
+                       attr->subbuf_size = default_get_ust_pid_channel_subbuf_size();
+                       attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM;
+                       attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT;
+                       attr->switch_timer_interval = DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER;
+                       attr->read_timer_interval = DEFAULT_UST_PID_CHANNEL_READ_TIMER;
+                       break;
+               }
        default:
                /* Default behavior: leave set to 0. */
                break;
@@ -1438,66 +1313,38 @@ int lttng_set_consumer_url(struct lttng_handle *handle,
 
        lsm.cmd_type = LTTNG_SET_CONSUMER_URI;
 
-       copy_string(lsm.session.name, handle->session_name,
+       lttng_ctl_copy_string(lsm.session.name, handle->session_name,
                        sizeof(lsm.session.name));
-       copy_lttng_domain(&lsm.domain, &handle->domain);
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
-       size = parse_str_urls_to_uri(control_url, data_url, &uris);
+       size = uri_parse_str_urls(control_url, data_url, &uris);
        if (size < 0) {
                return -LTTNG_ERR_INVALID;
        }
 
        lsm.u.uri.size = size;
 
-       ret = ask_sessiond_varlen(&lsm, uris, sizeof(struct lttng_uri) * size,
-                       NULL);
+       ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris,
+                       sizeof(struct lttng_uri) * size, NULL);
 
        free(uris);
        return ret;
 }
 
 /*
- * Enable consumer for a session and domain.
- *
- * Return 0 on success, else a negative value.
+ * [OBSOLETE]
  */
 int lttng_enable_consumer(struct lttng_handle *handle)
 {
-       struct lttcomm_session_msg lsm;
-
-       if (handle == NULL) {
-               return -LTTNG_ERR_INVALID;
-       }
-
-       lsm.cmd_type = LTTNG_ENABLE_CONSUMER;
-
-       copy_string(lsm.session.name, handle->session_name,
-                       sizeof(lsm.session.name));
-       copy_lttng_domain(&lsm.domain, &handle->domain);
-
-       return ask_sessiond(&lsm, NULL);
+       return -ENOSYS;
 }
 
 /*
- * Disable consumer for a session and domain.
- *
- * Return 0 on success, else a negative value.
+ * [OBSOLETE]
  */
 int lttng_disable_consumer(struct lttng_handle *handle)
 {
-       struct lttcomm_session_msg lsm;
-
-       if (handle == NULL) {
-               return -LTTNG_ERR_INVALID;
-       }
-
-       lsm.cmd_type = LTTNG_DISABLE_CONSUMER;
-
-       copy_string(lsm.session.name, handle->session_name,
-                       sizeof(lsm.session.name));
-       copy_lttng_domain(&lsm.domain, &handle->domain);
-
-       return ask_sessiond(&lsm, NULL);
+       return -ENOSYS;
 }
 
 /*
@@ -1520,8 +1367,8 @@ static int set_health_socket_path(void)
        }
 
        if ((uid == 0) || in_tgroup) {
-               copy_string(health_sock_path, DEFAULT_GLOBAL_HEALTH_UNIX_SOCK,
-                               sizeof(health_sock_path));
+               lttng_ctl_copy_string(health_sock_path,
+                               DEFAULT_GLOBAL_HEALTH_UNIX_SOCK, sizeof(health_sock_path));
        }
 
        if (uid != 0) {
@@ -1531,7 +1378,7 @@ static int set_health_socket_path(void)
                 * With GNU C <  2.1, snprintf returns -1 if the target buffer is too small;
                 * With GNU C >= 2.1, snprintf returns the required size (excluding closing null)
                 */
-               home = getenv("HOME");
+               home = utils_get_home_dir();
                if (home == NULL) {
                        /* Fallback in /tmp .. */
                        home = "/tmp";
@@ -1587,7 +1434,12 @@ int lttng_health_check(enum lttng_health_component c)
        ret = reply.ret_code;
 
 close_error:
-       close(sock);
+       {
+               int closeret;
+
+               closeret = close(sock);
+               assert(!closeret);
+       }
 
 error:
        return ret;
@@ -1626,10 +1478,10 @@ int _lttng_create_session_ext(const char *name, const char *url,
        memset(&lsm, 0, sizeof(lsm));
 
        lsm.cmd_type = LTTNG_CREATE_SESSION;
-       copy_string(lsm.session.name, name, sizeof(lsm.session.name));
+       lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
 
        /* There should never be a data URL */
-       size = parse_str_urls_to_uri(url, NULL, &uris);
+       size = uri_parse_str_urls(url, NULL, &uris);
        if (size < 0) {
                ret = -LTTNG_ERR_INVALID;
                goto error;
@@ -1638,8 +1490,14 @@ int _lttng_create_session_ext(const char *name, const char *url,
        lsm.u.uri.size = size;
 
        if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) {
-               ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", name,
-                               datetime);
+               /* Don't append datetime if the name was automatically created. */
+               if (strncmp(name, DEFAULT_SESSION_NAME "-",
+                                       strlen(DEFAULT_SESSION_NAME) + 1)) {
+                       ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s",
+                                       name, datetime);
+               } else {
+                       ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name);
+               }
                if (ret < 0) {
                        PERROR("snprintf uri subdir");
                        ret = -LTTNG_ERR_FATAL;
@@ -1647,8 +1505,8 @@ int _lttng_create_session_ext(const char *name, const char *url,
                }
        }
 
-       ret = ask_sessiond_varlen(&lsm, uris, sizeof(struct lttng_uri) * size,
-                       NULL);
+       ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris,
+                       sizeof(struct lttng_uri) * size, NULL);
 
 error:
        free(uris);
@@ -1671,14 +1529,16 @@ int lttng_data_pending(const char *session_name)
 
        lsm.cmd_type = LTTNG_DATA_PENDING;
 
-       copy_string(lsm.session.name, session_name, sizeof(lsm.session.name));
+       lttng_ctl_copy_string(lsm.session.name, session_name,
+                       sizeof(lsm.session.name));
 
-       ret = ask_sessiond(&lsm, NULL);
+       ret = lttng_ctl_ask_sessiond(&lsm, NULL);
 
        /*
-        * The ask_sessiond function negate the return code if it's not LTTNG_OK so
-        * getting -1 means that the reply ret_code was 1 thus meaning that the
-        * data is available. Yes it is hackish but for now this is the only way.
+        * The lttng_ctl_ask_sessiond function negate the return code if it's not
+        * LTTNG_OK so getting -1 means that the reply ret_code was 1 thus meaning
+        * that the data is available. Yes it is hackish but for now this is the
+        * only way.
         */
        if (ret == -1) {
                ret = 1;
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