/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- * Copyright (C) 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2020 Jérémie Galarneau <jeremie.galarneau@efficios.com>
*
- * 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.
+ * 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.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _GNU_SOURCE
#define _LGPL_SOURCE
#include <ctype.h>
#include <popt.h>
+#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
+#include <assert.h>
#include <urcu/list.h>
+#include <common/dynamic-array.h>
#include <common/mi-lttng.h>
+#include <common/optional.h>
+#include <common/dynamic-buffer.h>
+#include <common/tracker.h>
+
+#include <lttng/lttng.h>
#include "../command.h"
+struct process_attr_command_args {
+ enum lttng_process_attr process_attr;
+ /* Present in the user's command. */
+ bool requested;
+ bool all;
+ struct lttng_dynamic_pointer_array string_args;
+};
+
enum cmd_type {
CMD_TRACK,
CMD_UNTRACK,
};
-static char *opt_session_name;
-static int opt_kernel;
-static int opt_userspace;
-static int opt_all;
-static char *opt_pid_string;
-static int opt_pid;
-
+/* Offset OPT_ values by one since libpopt gives '0' a special meaning. */
enum {
- OPT_HELP = 1,
+ OPT_PID = LTTNG_PROCESS_ATTR_PROCESS_ID + 1,
+ OPT_VPID = LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID + 1,
+ OPT_UID = LTTNG_PROCESS_ATTR_USER_ID + 1,
+ OPT_VUID = LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID + 1,
+ OPT_GID = LTTNG_PROCESS_ATTR_GROUP_ID + 1,
+ OPT_VGID = LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID + 1,
+ OPT_HELP,
OPT_LIST_OPTIONS,
OPT_SESSION,
- OPT_PID,
+ OPT_ALL,
};
+static char *opt_session_name;
+static int opt_kernel;
+static int opt_userspace;
+static char *opt_str_arg;
+
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, OPT_SESSION, 0, 0, },
{ "kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0, },
{ "userspace", 'u', POPT_ARG_VAL, &opt_userspace, 1, 0, 0, },
- { "pid", 'p', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_pid_string, OPT_PID, 0, 0, },
- { "all", 'a', POPT_ARG_VAL, &opt_all, 1, 0, 0, },
+ { "pid", 'p', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_str_arg, OPT_PID, 0, 0, },
+ { "vpid", 0, POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_str_arg, OPT_VPID, 0, 0, },
+ { "uid", 0, POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_str_arg, OPT_UID, 0, 0, },
+ { "vuid", 0, POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_str_arg, OPT_VUID, 0, 0, },
+ { "gid", 0, POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_str_arg, OPT_GID, 0, 0, },
+ { "vgid", 0, POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_str_arg, OPT_VGID, 0, 0, },
+ { "all", 'a', POPT_ARG_NONE, 0, OPT_ALL, 0, 0, },
{ "list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, 0, 0, },
{ 0, 0, 0, 0, 0, 0, 0, },
};
-/*
- * usage
- */
-static void usage(FILE *ofp, const char *cmd_str)
+static struct process_attr_command_args
+ process_attr_commands[LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID + 1];
+
+static void process_attr_command_init(struct process_attr_command_args *cmd,
+ enum lttng_process_attr process_attr)
{
- fprintf(ofp, "usage: lttng %s [-k|-u] [OPTIONS]\n", cmd_str);
- fprintf(ofp, "\n");
- fprintf(ofp, "If no session is given (-s), the context is added to\n");
- fprintf(ofp, "the current sesssion. Exactly one domain (-k or -u)\n");
- fprintf(ofp, "must be specified.\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, " -s, --session NAME Apply to session name.\n");
- fprintf(ofp, " -k, --kernel Apply to the kernel tracer.\n");
- fprintf(ofp, " -u, --userspace Apply to the user-space tracer.\n");
- fprintf(ofp, " -p, --pid [PID] Process ID tracker. Leave PID empty when used with --all.\n");
- fprintf(ofp, " -a, --all All PIDs (use with --pid).\n");
- fprintf(ofp, "\n");
+ cmd->process_attr = process_attr;
+ cmd->all = false;
+ lttng_dynamic_pointer_array_init(&cmd->string_args, NULL);
}
-static
-int parse_pid_string(const char *_pid_string,
- int all, int **_pid_list, int *nr_pids)
+static void process_attr_command_fini(struct process_attr_command_args *cmd)
{
- const char *one_pid_str;
- char *iter;
- int retval = CMD_SUCCESS;
- int count = 0;
- int *pid_list = NULL;
- char *pid_string = NULL;
- char *endptr;
-
- if (all && _pid_string) {
- ERR("An empty PID string is expected with --all");
- retval = CMD_ERROR;
- goto error;
- }
- if (!all && !_pid_string) {
- ERR("Please specify --all with an empty PID string");
- retval = CMD_ERROR;
- goto error;
+ lttng_dynamic_pointer_array_reset(&cmd->string_args);
+}
+
+static const char *get_capitalized_process_attr_str(enum lttng_process_attr process_attr)
+{
+ switch (process_attr) {
+ case LTTNG_PROCESS_ATTR_PROCESS_ID:
+ return "Process ID";
+ case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID:
+ return "Virtual process ID";
+ case LTTNG_PROCESS_ATTR_USER_ID:
+ return "User ID";
+ case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
+ return "Virtual user ID";
+ case LTTNG_PROCESS_ATTR_GROUP_ID:
+ return "Group ID";
+ case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
+ return "Virtual group ID";
+ default:
+ return "Unknown";
}
- if (all) {
- pid_list = zmalloc(sizeof(*_pid_list));
- if (!pid_list) {
- ERR("Out of memory");
- retval = CMD_ERROR;
- goto error;
- }
- /* Empty PID string means all PIDs */
- count = 1;
- pid_list[0] = -1;
- goto assign;
+ return NULL;
+}
+
+static bool ust_process_attr_supported(enum lttng_process_attr *process_attr)
+{
+ bool supported;
+
+ switch (*process_attr) {
+ case LTTNG_PROCESS_ATTR_PROCESS_ID:
+ *process_attr = LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID;
+ /* fall-through. */
+ case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID:
+ case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
+ case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
+ supported = true;
+ break;
+ default:
+ ERR("The %s process attribute cannot be tracked in the user space domain.",
+ lttng_process_attr_to_string(*process_attr));
+ supported = false;
+ break;
}
+ return supported;
+}
- pid_string = strdup(_pid_string);
- if (!pid_string) {
- ERR("Out of memory");
- retval = CMD_ERROR;
- goto error;
+static const char *get_mi_element_command(enum cmd_type cmd_type)
+{
+ switch (cmd_type) {
+ case CMD_TRACK:
+ return mi_lttng_element_command_track;
+ case CMD_UNTRACK:
+ return mi_lttng_element_command_untrack;
+ default:
+ abort();
}
+}
- /* Count */
- one_pid_str = strtok_r(pid_string, ",", &iter);
- while (one_pid_str != NULL) {
- unsigned long v;
-
- errno = 0;
- v = strtoul(one_pid_str, &endptr, 10);
- if ((v == 0 && errno == EINVAL)
- || (v == ULONG_MAX && errno == ERANGE)
- || (*one_pid_str != '\0' && *endptr != '\0')){
- ERR("Error parsing PID %s", one_pid_str);
- retval = CMD_ERROR;
- goto error;
- }
+static enum cmd_error_code run_command_all(enum cmd_type cmd_type,
+ const char *session_name,
+ enum lttng_domain_type domain_type,
+ enum lttng_process_attr process_attr,
+ struct mi_writer *writer)
+{
+ struct lttng_process_attr_tracker_handle *tracker_handle = NULL;
+ const enum lttng_error_code handle_ret_code =
+ lttng_session_get_tracker_handle(session_name,
+ domain_type, process_attr,
+ &tracker_handle);
+ enum cmd_error_code cmd_ret = CMD_SUCCESS;
+ enum lttng_process_attr_tracker_handle_status status;
- if ((long) v > INT_MAX || (int) v < 0) {
- ERR("Invalid PID value %ld", (long) v);
- retval = CMD_ERROR;
- goto error;
+ if (writer) {
+ const int ret = mi_lttng_all_process_attribute_value(
+ writer, process_attr, true);
+ if (ret) {
+ cmd_ret = CMD_FATAL;
+ goto end;
}
- count++;
-
- /* For next loop */
- one_pid_str = strtok_r(NULL, ",", &iter);
}
- free(pid_string);
- /* Identity of delimiter has been lost in first pass. */
- pid_string = strdup(_pid_string);
- if (!pid_string) {
- ERR("Out of memory");
- retval = CMD_ERROR;
- goto error;
+ if (handle_ret_code != LTTNG_OK) {
+ ERR("Session `%s` does not exist", session_name);
+ cmd_ret = CMD_FATAL;
+ goto end;
}
- /* Allocate */
- pid_list = zmalloc(count * sizeof(*pid_list));
- if (!pid_list) {
- ERR("Out of memory");
- retval = CMD_ERROR;
- goto error;
+ status = lttng_process_attr_tracker_handle_set_tracking_policy(
+ tracker_handle,
+ cmd_type == CMD_TRACK ?
+ LTTNG_TRACKING_POLICY_INCLUDE_ALL :
+ LTTNG_TRACKING_POLICY_EXCLUDE_ALL);
+ switch (status) {
+ case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_OK:
+ if (cmd_type == CMD_TRACK) {
+ MSG("%s tracking policy set to `include all`",
+ get_capitalized_process_attr_str(process_attr));
+ } else {
+ MSG("%s tracking policy set to `exclude all`",
+ get_capitalized_process_attr_str(process_attr));
+ }
+ break;
+ case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_SESSION_DOES_NOT_EXIST:
+ ERR("%s", lttng_strerror(-LTTNG_ERR_SESS_NOT_FOUND));
+ break;
+ default:
+ ERR("Unknown error encountered while setting tracking policy of %s tracker to `%s`",
+ lttng_process_attr_to_string(process_attr),
+ cmd_type == CMD_TRACK ? "include all" :
+ "exclude all");
+ cmd_ret = CMD_FATAL;
+ break;
}
+end:
+ if (writer) {
+ int ret = mi_lttng_writer_write_element_bool(writer,
+ mi_lttng_element_success,
+ cmd_ret == CMD_SUCCESS);
- /* Copy */
- count = 0;
- one_pid_str = strtok_r(pid_string, ",", &iter);
- while (one_pid_str != NULL) {
- unsigned long v;
-
- v = strtoul(one_pid_str, NULL, 10);
- pid_list[count++] = (int) v;
-
- /* For next loop */
- one_pid_str = strtok_r(NULL, ",", &iter);
+ if (ret) {
+ cmd_ret = CMD_FATAL;
+ } else {
+ ret = mi_lttng_writer_close_element(writer);
+ cmd_ret = ret == 0 ? cmd_ret : CMD_FATAL;
+ }
}
-
-assign:
- *nr_pids = count;
- *_pid_list = pid_list;
- goto end; /* SUCCESS */
-
- /* ERROR */
-error:
- free(pid_list);
-end:
- free(pid_string);
- return retval;
+ lttng_process_attr_tracker_handle_destroy(tracker_handle);
+ return cmd_ret;
}
-static
-int track_untrack_pid(enum cmd_type cmd_type, const char *cmd_str,
- const char *session_name, const char *pid_string,
- int all, struct mi_writer *writer)
+static enum cmd_error_code run_command_string(enum cmd_type cmd_type,
+ const char *session_name,
+ enum lttng_domain_type domain_type,
+ enum lttng_process_attr process_attr,
+ const char *_args,
+ struct mi_writer *writer)
{
- int ret, retval = CMD_SUCCESS, i;
- int *pid_list = NULL;
- int nr_pids;
- struct lttng_domain dom;
- struct lttng_handle *handle = NULL;
- int (*lib_func)(struct lttng_handle *handle, int pid);
-
- switch (cmd_type) {
- case CMD_TRACK:
- lib_func = lttng_track_pid;
- break;
- case CMD_UNTRACK:
- lib_func = lttng_untrack_pid;
- break;
- default:
- ERR("Unknown command");
- retval = CMD_ERROR;
+ struct lttng_process_attr_tracker_handle *tracker_handle;
+ const enum lttng_error_code handle_ret_code =
+ lttng_session_get_tracker_handle(session_name,
+ domain_type, process_attr,
+ &tracker_handle);
+ enum cmd_error_code cmd_ret = CMD_SUCCESS;
+ const char *one_value_str;
+ char *args = strdup(_args);
+ char *iter = args;
+ bool policy_set = false;
+
+ if (!args) {
+ ERR("%s", lttng_strerror(-LTTNG_ERR_NOMEM));
+ cmd_ret = CMD_FATAL;
goto end;
}
- memset(&dom, 0, sizeof(dom));
- if (opt_kernel) {
- dom.type = LTTNG_DOMAIN_KERNEL;
- } else if (opt_userspace) {
- dom.type = LTTNG_DOMAIN_UST;
- } else {
- print_missing_domain();
- ret = CMD_ERROR;
+ if (handle_ret_code != LTTNG_OK) {
+ ERR("%s", lttng_strerror(-handle_ret_code));
+ cmd_ret = CMD_FATAL;
goto end;
}
- ret = parse_pid_string(pid_string, all, &pid_list, &nr_pids);
- if (ret != CMD_SUCCESS) {
- ERR("Error parsing PID string");
- usage(stderr, cmd_str);
- retval = CMD_ERROR;
- goto end;
- }
+ while ((one_value_str = strtok_r(iter, ",", &iter)) != NULL) {
+ const bool is_numerical_argument = isdigit(one_value_str[0]);
+ enum lttng_process_attr_tracker_handle_status status;
+ enum lttng_tracking_policy policy;
+ int ret;
+ char *prettified_arg;
+
+ if (!policy_set) {
+ status = lttng_process_attr_tracker_handle_get_tracking_policy(
+ tracker_handle, &policy);
+ if (status != LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_OK) {
+ break;
+ }
+
+ if (policy != LTTNG_TRACKING_POLICY_INCLUDE_SET) {
+ status = lttng_process_attr_tracker_handle_set_tracking_policy(
+ tracker_handle,
+ LTTNG_TRACKING_POLICY_INCLUDE_SET);
+ if (status != LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_OK) {
+ break;
+ }
+ }
+ policy_set = true;
+ }
- handle = lttng_create_handle(session_name, &dom);
- if (handle == NULL) {
- retval = CMD_ERROR;
- goto end;
- }
+ if (is_numerical_argument) {
+ const unsigned long one_value_int =
+ strtoul(one_value_str, NULL, 10);
+
+ if (writer) {
+ ret = mi_lttng_integral_process_attribute_value(
+ writer, process_attr,
+ (int64_t) one_value_int, true);
+ if (ret) {
+ cmd_ret = CMD_FATAL;
+ goto end;
+ }
+ }
+
+ switch (process_attr) {
+ case LTTNG_PROCESS_ATTR_PROCESS_ID:
+ status = cmd_type == CMD_TRACK ?
+ lttng_process_attr_process_id_tracker_handle_add_pid(
+ tracker_handle,
+ (pid_t) one_value_int) :
+ lttng_process_attr_process_id_tracker_handle_remove_pid(
+ tracker_handle,
+ (pid_t) one_value_int);
+ break;
+ case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID:
+ status = cmd_type == CMD_TRACK ?
+ lttng_process_attr_virtual_process_id_tracker_handle_add_pid(
+ tracker_handle,
+ (pid_t) one_value_int) :
+ lttng_process_attr_virtual_process_id_tracker_handle_remove_pid(
+ tracker_handle,
+ (pid_t) one_value_int);
+ break;
+ case LTTNG_PROCESS_ATTR_USER_ID:
+ status = cmd_type == CMD_TRACK ?
+ lttng_process_attr_user_id_tracker_handle_add_uid(
+ tracker_handle,
+ (uid_t) one_value_int) :
+ lttng_process_attr_user_id_tracker_handle_remove_uid(
+ tracker_handle,
+ (uid_t) one_value_int);
+ break;
+ case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
+ status = cmd_type == CMD_TRACK ?
+ lttng_process_attr_virtual_user_id_tracker_handle_add_uid(
+ tracker_handle,
+ (uid_t) one_value_int) :
+ lttng_process_attr_virtual_user_id_tracker_handle_remove_uid(
+ tracker_handle,
+ (uid_t) one_value_int);
+ break;
+ case LTTNG_PROCESS_ATTR_GROUP_ID:
+ status = cmd_type == CMD_TRACK ?
+ lttng_process_attr_group_id_tracker_handle_add_gid(
+ tracker_handle,
+ (gid_t) one_value_int) :
+ lttng_process_attr_group_id_tracker_handle_remove_gid(
+ tracker_handle,
+ (gid_t) one_value_int);
+ break;
+ case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
+ status = cmd_type == CMD_TRACK ?
+ lttng_process_attr_virtual_group_id_tracker_handle_add_gid(
+ tracker_handle,
+ (gid_t) one_value_int) :
+ lttng_process_attr_virtual_group_id_tracker_handle_remove_gid(
+ tracker_handle,
+ (gid_t) one_value_int);
+ break;
+ default:
+ abort();
+ }
+
+ } else {
+ if (writer) {
+ ret = mi_lttng_string_process_attribute_value(
+ writer, process_attr,
+ one_value_str, true);
+ if (ret) {
+ cmd_ret = CMD_FATAL;
+ goto end;
+ }
+ }
+
+ switch (process_attr) {
+ case LTTNG_PROCESS_ATTR_USER_ID:
+ status = cmd_type == CMD_TRACK ?
+ lttng_process_attr_user_id_tracker_handle_add_user_name(
+ tracker_handle,
+ one_value_str) :
+ lttng_process_attr_user_id_tracker_handle_remove_user_name(
+ tracker_handle,
+ one_value_str);
+ break;
+ case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
+ status = cmd_type == CMD_TRACK ?
+ lttng_process_attr_virtual_user_id_tracker_handle_add_user_name(
+ tracker_handle,
+ one_value_str) :
+ lttng_process_attr_virtual_user_id_tracker_handle_remove_user_name(
+ tracker_handle,
+ one_value_str);
+ break;
+ case LTTNG_PROCESS_ATTR_GROUP_ID:
+ status = cmd_type == CMD_TRACK ?
+ lttng_process_attr_group_id_tracker_handle_add_group_name(
+ tracker_handle,
+ one_value_str) :
+ lttng_process_attr_group_id_tracker_handle_remove_group_name(
+ tracker_handle,
+ one_value_str);
+ break;
+ case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
+ status = cmd_type == CMD_TRACK ?
+ lttng_process_attr_virtual_group_id_tracker_handle_add_group_name(
+ tracker_handle,
+ one_value_str) :
+ lttng_process_attr_virtual_group_id_tracker_handle_remove_group_name(
+ tracker_handle,
+ one_value_str);
+ break;
+ default:
+ ERR("%s is not a valid %s value; expected an integer",
+ one_value_str,
+ lttng_process_attr_to_string(
+ process_attr));
+ cmd_ret = CMD_FATAL;
+ goto end;
+ }
+ }
- if (writer) {
- /* Open pids element */
- ret = mi_lttng_writer_open_element(writer, config_element_pids);
- if (ret) {
- retval = CMD_ERROR;
+ ret = asprintf(&prettified_arg,
+ is_numerical_argument ? "%s" : "`%s`",
+ one_value_str);
+ if (ret < 0) {
+ PERROR("Failed to format argument `%s`", one_value_str);
+ cmd_ret = CMD_FATAL;
goto end;
}
+
+ switch (status) {
+ case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_OK:
+ if (cmd_type == CMD_TRACK) {
+ MSG("Added %s to the %s tracker inclusion set",
+ one_value_str,
+ lttng_process_attr_to_string(
+ process_attr));
+ } else {
+ MSG("Removed %s from the %s tracker inclusion set",
+ one_value_str,
+ lttng_process_attr_to_string(
+ process_attr));
+ }
+ break;
+ case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_SESSION_DOES_NOT_EXIST:
+ ERR("Session `%s` not found", session_name);
+ break;
+ case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_EXISTS:
+ WARN("%s is already in the %s inclusion set",
+ prettified_arg,
+ lttng_process_attr_to_string(
+ process_attr));
+ break;
+ case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_MISSING:
+ WARN("%s is not in the %s the inclusion set",
+ prettified_arg,
+ lttng_process_attr_to_string(
+ process_attr));
+ break;
+ case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_USER_NOT_FOUND:
+ ERR("User %s was not found", prettified_arg);
+ cmd_ret = CMD_ERROR;
+ break;
+ case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_GROUP_NOT_FOUND:
+ ERR("Group %s was not found", prettified_arg);
+ cmd_ret = CMD_ERROR;
+ break;
+ default:
+ ERR("Unknown error encountered while %s %s %s %s tracker's inclusion set",
+ cmd_type == CMD_TRACK ? "adding" :
+ "removing",
+ lttng_process_attr_to_string(
+ process_attr),
+ prettified_arg,
+ cmd_type == CMD_TRACK ? "to" : "from");
+ cmd_ret = CMD_FATAL;
+ break;
+ }
+ free(prettified_arg);
+
+ if (writer) {
+ ret = mi_lttng_writer_write_element_bool(writer,
+ mi_lttng_element_success,
+ cmd_ret == CMD_SUCCESS);
+
+ if (ret) {
+ cmd_ret = CMD_FATAL;
+ } else {
+ ret = mi_lttng_writer_close_element(writer);
+ cmd_ret = ret == 0 ? cmd_ret : CMD_FATAL;
+ }
+ }
}
+end:
+ free(args);
+ lttng_process_attr_tracker_handle_destroy(tracker_handle);
+ return cmd_ret;
+}
- /* TODO: MI */
- for (i = 0; i < nr_pids; i++) {
- DBG("%s PID %d", cmd_str, pid_list[i]);
- ret = lib_func(handle, pid_list[i]);
- if (ret) {
- retval = CMD_ERROR;
+static enum cmd_error_code run_command(enum cmd_type cmd_type,
+ const char *session_name,
+ const struct process_attr_command_args *command_args,
+ struct mi_writer *writer)
+{
+ const enum lttng_domain_type domain_type =
+ opt_kernel ? LTTNG_DOMAIN_KERNEL : LTTNG_DOMAIN_UST;
+ enum cmd_error_code cmd_ret = CMD_SUCCESS;
+ unsigned int i;
+ const unsigned int string_arg_count =
+ lttng_dynamic_pointer_array_get_count(
+ &command_args->string_args);
+ enum lttng_process_attr process_attr = command_args->process_attr;
+
+ if (opt_userspace) {
+ /*
+ * Check that this process attribute can be tracked
+ * in the user space domain. Backward-compatibility
+ * changes are be applied to process_attr as needed.
+ */
+ if (!ust_process_attr_supported(&process_attr)) {
+ cmd_ret = CMD_ERROR;
goto end;
}
}
if (writer) {
- /* Close pids element */
- ret = mi_lttng_writer_close_element(writer);
+ /* Open tracker and trackers elements */
+ const int ret = mi_lttng_process_attribute_tracker_open(
+ writer, process_attr);
if (ret) {
- retval = CMD_ERROR;
+ cmd_ret = CMD_FATAL;
goto end;
}
}
- /* SUCCESS */
-end:
- if (handle) {
- lttng_destroy_handle(handle);
+ if (command_args->all) {
+ cmd_ret = run_command_all(cmd_type, session_name, domain_type,
+ process_attr, writer);
+ } else {
+ bool error_occurred = false;
+
+ for (i = 0; i < string_arg_count; i++) {
+ const char *arg = lttng_dynamic_pointer_array_get_pointer(
+ &command_args->string_args, i);
+
+ cmd_ret = run_command_string(cmd_type, session_name,
+ domain_type, process_attr, arg, writer);
+ if (cmd_ret != CMD_SUCCESS) {
+ error_occurred = true;
+ if (cmd_ret == CMD_FATAL) {
+ break;
+ }
+ goto end;
+ }
+ }
+ if (error_occurred) {
+ cmd_ret = CMD_ERROR;
+ }
}
- free(pid_list);
- return retval;
-}
-static
-const char *get_mi_element_command(enum cmd_type cmd_type)
-{
- switch (cmd_type) {
- case CMD_TRACK:
- return mi_lttng_element_command_track;
- case CMD_UNTRACK:
- return mi_lttng_element_command_untrack;
- default:
- return NULL;
+ if (writer) {
+ /* Close tracker and trackers elements */
+ const int ret = mi_lttng_close_multi_element(
+ writer, 2);
+ if (ret) {
+ cmd_ret = CMD_FATAL;
+ goto end;
+ }
}
+end:
+ return cmd_ret;
}
/*
* Add/remove tracker to/from session.
*/
-static
-int cmd_track_untrack(enum cmd_type cmd_type, const char *cmd_str,
- int argc, const char **argv)
+static int cmd_track_untrack(enum cmd_type cmd_type,
+ int argc,
+ const char **argv,
+ const char *help_msg)
{
- int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
- int success = 1;
+ int opt, ret = 0;
+ bool sub_command_failed = false;
+ bool opt_all = false;
+ unsigned int selected_process_attr_tracker_count = 0;
+ const unsigned int command_count =
+ sizeof(process_attr_commands) /
+ sizeof(struct process_attr_command_args);
+ enum cmd_error_code command_ret = CMD_SUCCESS;
static poptContext pc;
char *session_name = NULL;
+ const char *leftover = NULL;
struct mi_writer *writer = NULL;
+ size_t i;
+
+ for (i = 0; i < command_count; i++) {
+ process_attr_command_init(&process_attr_commands[i], i);
+ }
if (argc < 1) {
- usage(stderr, cmd_str);
- ret = CMD_ERROR;
+ command_ret = CMD_ERROR;
goto end;
}
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
- usage(stdout, cmd_str);
+ SHOW_HELP();
goto end;
case OPT_LIST_OPTIONS:
list_cmd_options(stdout, long_options);
goto end;
case OPT_SESSION:
+ break;
case OPT_PID:
- opt_pid = 1;
+ case OPT_VPID:
+ case OPT_UID:
+ case OPT_VUID:
+ case OPT_GID:
+ case OPT_VGID:
+ /* See OPT_ enum declaration comment. */
+ opt--;
+ selected_process_attr_tracker_count++;
+ process_attr_commands[opt].requested = true;
+ if (!opt_str_arg) {
+ continue;
+ }
+ ret = lttng_dynamic_pointer_array_add_pointer(
+ &process_attr_commands[opt].string_args,
+ opt_str_arg);
+ if (ret) {
+ ERR("Allocation failed while parsing command arguments");
+ command_ret = CMD_ERROR;
+ goto end;
+ }
+ break;
+ case OPT_ALL:
+ opt_all = true;
break;
default:
- usage(stderr, cmd_str);
- ret = CMD_UNDEFINED;
+ command_ret = CMD_UNDEFINED;
goto end;
}
}
- if (!(opt_userspace ^ opt_kernel)) {
- ERR("Exactly one of -u or -k needs to be specified.");
- usage(stderr, cmd_str);
- ret = CMD_ERROR;
+ ret = print_missing_or_multiple_domains(
+ opt_kernel + opt_userspace, false);
+ if (ret) {
+ command_ret = CMD_ERROR;
+ goto end;
+ }
+
+ if (selected_process_attr_tracker_count == 0) {
+ ERR("At least one process attribute must be specified");
+ command_ret = CMD_ERROR;
goto end;
}
+ if (opt_all) {
+ /*
+ * Only one process attribute tracker was specified; find it
+ * and set it in 'all' mode.
+ */
+ for (i = 0; i < command_count; i++) {
+ if (!process_attr_commands[i].requested) {
+ continue;
+ }
+ process_attr_commands[i].all = true;
+ if (lttng_dynamic_pointer_array_get_count(
+ &process_attr_commands[i]
+ .string_args)) {
+ ERR("The --all option cannot be used with a list of process attribute values");
+ command_ret = CMD_ERROR;
+ goto end;
+ }
+ }
+ } else {
+ for (i = 0; i < command_count; i++) {
+ if (!process_attr_commands[i].requested) {
+ continue;
+ }
+ if (lttng_dynamic_pointer_array_get_count(
+ &process_attr_commands[i]
+ .string_args) == 0) {
+ ERR("No process attribute value specified for %s tracker",
+ get_capitalized_process_attr_str(
+ process_attr_commands[i]
+ .process_attr));
+ command_ret = CMD_ERROR;
+ goto end;
+ }
+ }
+ }
if (!opt_session_name) {
session_name = get_session_name();
if (session_name == NULL) {
- ret = CMD_ERROR;
+ command_ret = CMD_ERROR;
goto end;
}
} else {
session_name = opt_session_name;
}
- /* Currently only PID tracker is supported */
- if (!opt_pid) {
- ERR("Please specify at least one tracker with its expected arguments");
- usage(stderr, cmd_str);
- ret = CMD_ERROR;
+ leftover = poptGetArg(pc);
+ if (leftover) {
+ ERR("Unknown argument: %s", leftover);
+ command_ret = CMD_ERROR;
goto end;
}
if (lttng_opt_mi) {
writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
if (!writer) {
- ret = CMD_ERROR;
+ command_ret = CMD_ERROR;
goto end;
}
}
ret = mi_lttng_writer_command_open(writer,
get_mi_element_command(cmd_type));
if (ret) {
- ret = CMD_ERROR;
+ command_ret = CMD_ERROR;
goto end;
}
ret = mi_lttng_writer_open_element(writer,
mi_lttng_element_command_output);
if (ret) {
- ret = CMD_ERROR;
+ command_ret = CMD_ERROR;
+ goto end;
+ }
+
+ ret = mi_lttng_trackers_open(writer);
+ if (ret) {
goto end;
}
}
- command_ret = track_untrack_pid(cmd_type,
- cmd_str, session_name, opt_pid_string,
- opt_all, writer);
- if (command_ret) {
- success = 0;
+ /* Execute sub-commands. */
+ for (i = 0; i < command_count; i++) {
+ if (!process_attr_commands[i].requested) {
+ continue;
+ }
+ command_ret = run_command(cmd_type, session_name,
+ &process_attr_commands[i], writer);
+ if (command_ret != CMD_SUCCESS) {
+ sub_command_failed = true;
+ if (command_ret == CMD_FATAL) {
+ break;
+ }
+ }
}
/* Mi closing */
if (writer) {
- /* Close output element */
- ret = mi_lttng_writer_close_element(writer);
+ /* Close trackers and output elements */
+ ret = mi_lttng_close_multi_element(writer, 2);
if (ret) {
- ret = CMD_ERROR;
+ command_ret = CMD_ERROR;
goto end;
}
/* Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
- mi_lttng_element_command_success, success);
+ mi_lttng_element_command_success,
+ !sub_command_failed);
if (ret) {
- ret = CMD_ERROR;
+ command_ret = CMD_ERROR;
goto end;
}
/* Command element close */
ret = mi_lttng_writer_command_close(writer);
if (ret) {
- ret = CMD_ERROR;
+ command_ret = CMD_ERROR;
goto end;
}
}
/* Mi clean-up */
if (writer && mi_lttng_writer_destroy(writer)) {
/* Preserve original error code */
- ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
+ command_ret = CMD_ERROR;
}
- /* Overwrite ret if an error occurred during track() */
- ret = command_ret ? command_ret : ret;
+ for (i = 0; i < command_count; i++) {
+ process_attr_command_fini(&process_attr_commands[i]);
+ }
poptFreeContext(pc);
- return ret;
+ return (int) command_ret;
}
int cmd_track(int argc, const char **argv)
{
- return cmd_track_untrack(CMD_TRACK, "track", argc, argv);
+ static const char *help_msg =
+#ifdef LTTNG_EMBED_HELP
+#include <lttng-track.1.h>
+#else
+ NULL
+#endif
+ ;
+
+ return cmd_track_untrack(CMD_TRACK, argc, argv, help_msg);
}
int cmd_untrack(int argc, const char **argv)
{
- return cmd_track_untrack(CMD_UNTRACK, "untrack", argc, argv);
+ static const char *help_msg =
+#ifdef LTTNG_EMBED_HELP
+#include <lttng-untrack.1.h>
+#else
+ NULL
+#endif
+ ;
+
+ return cmd_track_untrack(CMD_UNTRACK, argc, argv, help_msg);
}
projects / lttng-tools.git / blobdiff