/*
* Copyright (C) 2011 - David Goulet <dgoulet@efficios.com>
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; only version 2 of the License.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2 only,
+ * as published by the Free Software Foundation.
*
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307, USA.
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#define _GNU_SOURCE
{ NULL, VIEWER_USER_DEFINED },
};
+/* Is the session we are trying to view is in live mode. */
+static int session_live_mode;
+
/*
* usage
*/
fprintf(ofp, "Where SESSION_NAME is an optional session name. If not specified, lttng will\n");
fprintf(ofp, "get it from the configuration file (.lttngrc).\n");
fprintf(ofp, "\n");
+ fprintf(ofp, "Options:\n");
fprintf(ofp, " -h, --help Show this help\n");
fprintf(ofp, " --list-options Simple listing of options\n");
fprintf(ofp, " -t, --trace-path PATH Trace directory path for the viewer\n");
const char *trace_path)
{
char **argv;
- size_t size;
+ size_t size, mem_len;
+
+
+ /* Add one for the NULL terminating element. */
+ mem_len = opts_len + 1;
+ if (session_live_mode) {
+ /* Add 3 option for the live mode being "-i lttng-live URL". */
+ mem_len += 3;
+ } else {
+ /* Add option for the trace path. */
+ mem_len += 1;
+ }
- size = sizeof(char *) * opts_len;
+ size = sizeof(char *) * mem_len;
/* Add two here for the trace_path and the NULL terminating element. */
- argv = malloc(size + 2);
+ argv = malloc(size);
if (argv == NULL) {
goto error;
}
memcpy(argv, opts, size);
- argv[opts_len] = (char *)trace_path;
- argv[opts_len + 1] = NULL;
+ if (session_live_mode) {
+ argv[opts_len] = "-i";
+ argv[opts_len + 1] = "lttng-live";
+ argv[opts_len + 2] = (char *) trace_path;
+ argv[opts_len + 3] = NULL;
+ } else {
+ argv[opts_len] = (char *) trace_path;
+ argv[opts_len + 1] = NULL;
+ }
error:
return argv;
ret = execvp(viewer_bin, argv);
if (ret) {
- PERROR("exec: %s", viewer_bin);
+ if (errno == ENOENT) {
+ ERR("%s not found on the system", viewer_bin);
+ } else {
+ PERROR("exec: %s", viewer_bin);
+ }
free(argv);
ret = CMD_FATAL;
goto error;
return ret;
}
+/*
+ * Build the live path we need for the lttng live view.
+ */
+static char *build_live_path(char *session_name)
+{
+ int ret;
+ char *path = NULL;
+ char hostname[HOST_NAME_MAX];
+
+ ret = gethostname(hostname, sizeof(hostname));
+ if (ret < 0) {
+ perror("gethostname");
+ goto error;
+ }
+
+ ret = asprintf(&path, "net://localhost/host/%s/%s", hostname,
+ session_name);
+ if (ret < 0) {
+ perror("asprintf live path");
+ goto error;
+ }
+
+error:
+ return path;
+}
+
/*
* Exec viewer if found and use session name path.
*/
static int view_trace(void)
{
- int ret, count, i, found = 0;
- char *session_name, *trace_path;
+ int ret;
+ char *session_name, *trace_path = NULL;
struct lttng_session *sessions = NULL;
/*
DBG("Viewing trace for session %s", session_name);
if (session_name) {
+ int i, count, found = 0;
+
/* Getting all sessions */
count = lttng_list_sessions(&sessions);
if (count < 0) {
goto free_sessions;
}
- trace_path = sessions[i].path;
+ session_live_mode = sessions[i].live_timer_interval;
+
+ DBG("Session live mode set to %d", session_live_mode);
+
+ if (sessions[i].enabled && !session_live_mode) {
+ WARN("Session %s is running. Please stop it before reading it.",
+ session_name);
+ ret = CMD_ERROR;
+ goto free_sessions;
+ }
+
+ /* If the timer interval is set we are in live mode. */
+ if (session_live_mode) {
+ trace_path = build_live_path(session_name);
+ if (!trace_path) {
+ ret = CMD_ERROR;
+ goto free_sessions;
+ }
+ } else {
+ /* Get file system session path. */
+ trace_path = sessions[i].path;
+ }
} else {
trace_path = opt_trace_path;
}
goto free_sessions;
}
- ret = CMD_SUCCESS;
-
free_sessions:
- if (sessions) {
- free(sessions);
+ if (session_live_mode) {
+ free(trace_path);
}
+ free(sessions);
free_error:
if (opt_session_name == NULL) {
free(session_name);
pc = poptGetContext(NULL, argc, argv, long_options, 0);
poptReadDefaultConfig(pc, 0);
+ if (lttng_opt_mi) {
+ WARN("mi does not apply to view command");
+ }
+
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
projects / lttng-tools.git / blobdiff