*/
#define _GNU_SOURCE
+#define _LGPL_SOURCE
#include <popt.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
+#include <assert.h>
+
+#include <common/mi-lttng.h>
#include "../command.h"
};
static struct lttng_handle *handle;
+static struct mi_writer *writer;
static struct poptOption long_options[] = {
/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
fprintf(ofp, "\n");
}
+static int mi_partial_channel_print(char *channel_name, unsigned int enabled,
+ int success)
+{
+ int ret;
+
+ assert(writer);
+ assert(channel_name);
+
+ /* Open channel element */
+ ret = mi_lttng_writer_open_element(writer, config_element_channel);
+ if (ret) {
+ goto end;
+ }
+
+ /* Name */
+ ret = mi_lttng_writer_write_element_string(writer, config_element_name,
+ channel_name);
+ if (ret) {
+ goto end;
+ }
+
+ /* Enabled ? */
+ ret = mi_lttng_writer_write_element_bool(writer, config_element_enabled,
+ enabled);
+ if (ret) {
+ goto end;
+ }
+
+ /* Success ? */
+ ret = mi_lttng_writer_write_element_bool(writer,
+ mi_lttng_element_success, success);
+ if (ret) {
+ goto end;
+ }
+
+ /* Closing channel element */
+ ret = mi_lttng_writer_close_element(writer);
+
+end:
+ return ret;
+}
+
/*
* Disabling channel using the lttng API.
*/
static int disable_channels(char *session_name)
{
- int ret = CMD_SUCCESS, warn = 0;
+ int ret = CMD_SUCCESS, warn = 0, success;
+
+ /* Normal case for disable channed is enabled = 0 */
+ unsigned int enabled = 0;
char *channel_name;
struct lttng_domain dom;
} else if (opt_userspace) {
dom.type = LTTNG_DOMAIN_UST;
} else {
- ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
+ print_missing_domain();
ret = CMD_ERROR;
goto error;
}
goto error;
}
+ /* Prepare MI */
+ if (lttng_opt_mi) {
+ /* open a channels element */
+ ret = mi_lttng_writer_open_element(writer, config_element_channels);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ }
+
/* Strip channel list */
channel_name = strtok(opt_channels, ",");
while (channel_name != NULL) {
ERR("Channel %s: %s (session %s)", channel_name,
lttng_strerror(ret), session_name);
warn = 1;
+
+ /*
+ * Mi:
+ * We assume that if an error occurred the channel is still active.
+ * This might not be the case but is a good assumption.
+ * The client should look at the stderr stream
+ * for more informations.
+ */
+ enabled = 1;
+ success = 0;
+
} else {
MSG("%s channel %s disabled for session %s",
- opt_kernel ? "Kernel" : "UST", channel_name, session_name);
+ get_domain_str(dom.type), channel_name, session_name);
+ enabled = 0;
+ success = 1;
+ }
+
+ /* Print the channel */
+ if (lttng_opt_mi) {
+ ret = mi_partial_channel_print(channel_name, enabled, success);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
}
/* Next channel */
ret = CMD_SUCCESS;
+ /* Close Mi */
+ if (lttng_opt_mi) {
+ /* Close channels element */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ }
+
error:
- if (warn) {
+ /* Bypass the warning if a more important error happened */
+ if (!ret && warn) {
ret = CMD_WARNING;
}
*/
int cmd_disable_channels(int argc, const char **argv)
{
- int opt, ret = CMD_SUCCESS;
+ int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
static poptContext pc;
char *session_name = NULL;
session_name = opt_session_name;
}
- ret = disable_channels(session_name);
+ /* Mi check */
+ if (lttng_opt_mi) {
+ writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
+ if (!writer) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ /* Open command element */
+ ret = mi_lttng_writer_command_open(writer,
+ mi_lttng_element_command_disable_channel);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Open output element */
+ ret = mi_lttng_writer_open_element(writer,
+ mi_lttng_element_command_output);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ }
+
+ command_ret = disable_channels(session_name);
+ if (command_ret) {
+ success = 0;
+ }
+
+ /* Mi closing */
+ if (lttng_opt_mi) {
+ /* Close output element */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Success ? */
+ ret = mi_lttng_writer_write_element_bool(writer,
+ mi_lttng_element_success, success);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Command element close */
+ ret = mi_lttng_writer_command_close(writer);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ }
end:
+ /* Mi clean-up */
+ if (writer && mi_lttng_writer_destroy(writer)) {
+ /* Preserve original error code */
+ ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
+ }
+
if (!opt_session_name && session_name) {
free(session_name);
}
+
+ /* Overwrite ret if an error occurred in disable_channels */
+ ret = command_ret ? command_ret : ret;
+
poptFreeContext(pc);
return ret;
}