/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
*
- * 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.
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * 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.
*/
-#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 <lttng/domain-internal.h>
-#include "../cmd.h"
-#include "../conf.h"
-#include "../utils.h"
+#include "../command.h"
static char *opt_channels;
static int opt_kernel;
static char *opt_session_name;
static int opt_userspace;
-static char *opt_cmd_name;
-static pid_t opt_pid;
+
+#ifdef LTTNG_EMBED_HELP
+static const char help_msg[] =
+#include <lttng-disable-channel.1.h>
+;
+#endif
enum {
OPT_HELP = 1,
OPT_USERSPACE,
+ OPT_LIST_OPTIONS,
};
static struct lttng_handle *handle;
+static struct mi_writer *writer;
static struct poptOption long_options[] = {
/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
{"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
- {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
- {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
+ {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
+ {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
{0, 0, 0, 0, 0, 0, 0}
};
-/*
- * usage
- */
-static void usage(FILE *ofp)
+static int mi_partial_channel_print(char *channel_name, unsigned int enabled,
+ int success)
{
- fprintf(ofp, "usage: lttng disable-channel NAME[,NAME2,...] [options]\n");
- fprintf(ofp, "\n");
- fprintf(ofp, " -h, --help Show this help\n");
- fprintf(ofp, " -s, --session Apply on session name\n");
- fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
- fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n");
- fprintf(ofp, " If no CMD, the domain used is UST global\n");
- fprintf(ofp, " or else the domain is UST EXEC_NAME\n");
- fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n");
- fprintf(ofp, "\n");
+ 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;
}
/*
*/
static int disable_channels(char *session_name)
{
- int ret = CMD_SUCCESS;
+ 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;
+ memset(&dom, 0, sizeof(dom));
+
+ /* Create lttng domain */
if (opt_kernel) {
dom.type = LTTNG_DOMAIN_KERNEL;
- } else if (opt_pid != 0) {
- dom.type = LTTNG_DOMAIN_UST_PID;
- dom.attr.pid = opt_pid;
- DBG("PID %d set to lttng handle", opt_pid);
- } else if (opt_userspace && opt_cmd_name == NULL) {
+ } else if (opt_userspace) {
dom.type = LTTNG_DOMAIN_UST;
- } else if (opt_userspace && opt_cmd_name != NULL) {
- dom.type = LTTNG_DOMAIN_UST_EXEC_NAME;
- strncpy(dom.attr.exec_name, opt_cmd_name, NAME_MAX);
} else {
- ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
- ret = CMD_NOT_IMPLEMENTED;
- goto error;
+ /* Checked by the caller. */
+ assert(0);
}
handle = lttng_create_handle(session_name, &dom);
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) {
ret = lttng_disable_channel(handle, channel_name);
if (ret < 0) {
- goto error;
+ 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);
+ lttng_domain_type_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 */
channel_name = strtok(NULL, ",");
}
+ 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:
+ /* Bypass the warning if a more important error happened */
+ if (!ret && warn) {
+ ret = CMD_WARNING;
+ }
+
lttng_destroy_handle(handle);
return ret;
*/
int cmd_disable_channels(int argc, const char **argv)
{
- int opt, ret;
+ int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
static poptContext pc;
char *session_name = NULL;
+ const char *leftover = NULL;
pc = poptGetContext(NULL, argc, argv, long_options, 0);
poptReadDefaultConfig(pc, 0);
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
- usage(stderr);
- ret = CMD_SUCCESS;
+ SHOW_HELP();
goto end;
case OPT_USERSPACE:
opt_userspace = 1;
break;
+ case OPT_LIST_OPTIONS:
+ list_cmd_options(stdout, long_options);
+ goto end;
default:
- usage(stderr);
ret = CMD_UNDEFINED;
goto end;
}
}
+ ret = print_missing_or_multiple_domains(
+ opt_kernel + opt_userspace, false);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
opt_channels = (char*) poptGetArg(pc);
if (opt_channels == NULL) {
ERR("Missing channel name(s).\n");
- usage(stderr);
- ret = CMD_SUCCESS;
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ leftover = poptGetArg(pc);
+ if (leftover) {
+ ERR("Unknown argument: %s", leftover);
+ ret = CMD_ERROR;
goto end;
}
if (!opt_session_name) {
session_name = get_session_name();
if (session_name == NULL) {
- ret = -1;
+ ret = CMD_ERROR;
goto end;
}
} else {
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;
}
projects / lttng-tools.git / blobdiff