--- /dev/null
+/*
+ * Copyright (C) 2021 Simon Marchi <simon.marchi@efficios.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "../command.h"
+#include "../loglevel.h"
+#include "../uprobe.h"
+
+#include "common/argpar/argpar.h"
+#include "common/dynamic-array.h"
+#include "common/mi-lttng.h"
+#include "common/string-utils/string-utils.h"
+#include "common/utils.h"
+#include <lttng/domain-internal.h>
+/* For lttng_event_rule_type_str(). */
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/lttng.h>
+#include "common/filter/filter-ast.h"
+#include "common/filter/filter-ir.h"
+#include "common/dynamic-array.h"
+
+#if (LTTNG_SYMBOL_NAME_LEN == 256)
+#define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255"
+#endif
+
+#ifdef LTTNG_EMBED_HELP
+static const char help_msg[] =
+#include <lttng-add-trigger.1.h>
+;
+#endif
+
+enum {
+ OPT_HELP,
+ OPT_LIST_OPTIONS,
+
+ OPT_CONDITION,
+ OPT_ACTION,
+ OPT_ID,
+ OPT_OWNER_UID,
+ OPT_RATE_POLICY,
+
+ OPT_NAME,
+ OPT_FILTER,
+ OPT_EXCLUDE_NAME,
+ OPT_EVENT_NAME,
+ OPT_LOG_LEVEL,
+
+ OPT_TYPE,
+ OPT_LOCATION,
+
+ OPT_MAX_SIZE,
+ OPT_DATA_URL,
+ OPT_CTRL_URL,
+ OPT_URL,
+ OPT_PATH,
+
+ OPT_CAPTURE,
+};
+
+static const struct argpar_opt_descr event_rule_opt_descrs[] = {
+ { OPT_FILTER, 'f', "filter", true },
+ { OPT_NAME, 'n', "name", true },
+ { OPT_EXCLUDE_NAME, 'x', "exclude-name", true },
+ { OPT_LOG_LEVEL, 'l', "log-level", true },
+ { OPT_EVENT_NAME, 'E', "event-name", true },
+
+ { OPT_TYPE, 't', "type", true },
+ { OPT_LOCATION, 'L', "location", true },
+
+ /* Capture descriptor */
+ { OPT_CAPTURE, '\0', "capture", true },
+
+ ARGPAR_OPT_DESCR_SENTINEL
+};
+
+static
+bool has_syscall_prefix(const char *arg)
+{
+ bool matches = false;
+ const char kernel_syscall_type_opt_prefix[] = "kernel:syscall";
+ const size_t kernel_syscall_type_opt_prefix_len =
+ sizeof(kernel_syscall_type_opt_prefix) - 1;
+ const char syscall_type_opt_prefix[] = "syscall";
+ const size_t syscall_type_opt_prefix_len =
+ sizeof(syscall_type_opt_prefix) - 1;
+
+ if (strncmp(arg, syscall_type_opt_prefix,
+ syscall_type_opt_prefix_len) == 0) {
+ matches = true;
+ } else if (strncmp(arg, kernel_syscall_type_opt_prefix,
+ kernel_syscall_type_opt_prefix_len) == 0) {
+ matches = true;
+ } else {
+ matches = false;
+ }
+
+ return matches;
+}
+
+static
+bool assign_event_rule_type(enum lttng_event_rule_type *dest, const char *arg)
+{
+ bool ret;
+
+ if (*dest != LTTNG_EVENT_RULE_TYPE_UNKNOWN) {
+ ERR("More than one `--type` was specified.");
+ goto error;
+ }
+
+ if (strcmp(arg, "user") == 0 || strcmp(arg, "user:tracepoint") == 0) {
+ *dest = LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT;
+ } else if (strcmp(arg, "kernel") == 0 ||
+ strcmp(arg, "kernel:tracepoint") == 0) {
+ *dest = LTTNG_EVENT_RULE_TYPE_KERNEL_TRACEPOINT;
+ } else if (strcmp(arg, "jul") == 0 || strcmp(arg, "jul:logging") == 0) {
+ *dest = LTTNG_EVENT_RULE_TYPE_JUL_LOGGING;
+ } else if (strcmp(arg, "log4j") == 0 ||
+ strcmp(arg, "log4j:logging") == 0) {
+ *dest = LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING;
+ } else if (strcmp(arg, "python") == 0 ||
+ strcmp(arg, "python:logging") == 0) {
+ *dest = LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING;
+ } else if (strcmp(arg, "kprobe") == 0 ||
+ strcmp(arg, "kernel:kprobe") == 0) {
+ *dest = LTTNG_EVENT_RULE_TYPE_KERNEL_KPROBE;
+ } else if (strcmp(arg, "kernel:uprobe") == 0) {
+ *dest = LTTNG_EVENT_RULE_TYPE_KERNEL_UPROBE;
+ } else if (has_syscall_prefix(arg)) {
+ /*
+ * Matches the following:
+ * - syscall
+ * - syscall:entry
+ * - syscall:exit
+ * - syscall:entry+exit
+ * - syscall:*
+ * - kernel:syscall
+ * - kernel:syscall:entry
+ * - kernel:syscall:exit
+ * - kernel:syscall:entry+exit
+ * - kernel:syscall:*
+ *
+ * Validation for the right side is left to further usage sites.
+ */
+ *dest = LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL;
+ } else {
+ ERR("Invalid `--type` value: %s", arg);
+ goto error;
+ }
+
+ ret = true;
+ goto end;
+
+error:
+ ret = false;
+
+end:
+ return ret;
+}
+
+static
+bool assign_string(char **dest, const char *src, const char *opt_name)
+{
+ bool ret;
+
+ if (*dest) {
+ ERR("Duplicate '%s' given.", opt_name);
+ goto error;
+ }
+
+ *dest = strdup(src);
+ if (!*dest) {
+ PERROR("Failed to allocate string '%s'.", opt_name);
+ goto error;
+ }
+
+ ret = true;
+ goto end;
+
+error:
+ ret = false;
+
+end:
+ return ret;
+}
+
+static bool parse_syscall_emission_site_from_type(const char *str,
+ enum lttng_event_rule_kernel_syscall_emission_site *type)
+{
+ bool ret = false;
+ const char kernel_prefix[] = "kernel:";
+ const size_t kernel_prefix_len = sizeof(kernel_prefix) - 1;
+
+ /*
+ * If the passed string is of the form "kernel:syscall*", move the
+ * pointer passed "kernel:".
+ */
+ if (strncmp(str, kernel_prefix, kernel_prefix_len) == 0) {
+ str = &str[kernel_prefix_len];
+ }
+
+ if (strcmp(str, "syscall") == 0 ||
+ strcmp(str, "syscall:entry+exit") == 0) {
+ *type = LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY_EXIT;
+ } else if (strcmp(str, "syscall:entry") == 0) {
+ *type = LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY;
+ } else if (strcmp(str, "syscall:exit") == 0) {
+ *type = LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_EXIT;
+ } else {
+ goto error;
+ }
+
+ ret = true;
+
+error:
+ return ret;
+}
+
+/*
+ * Parse `str` as a log level against the passed event rule type.
+ *
+ * Return the log level in `*log_level`. Return true in `*log_level_only` if
+ * the string specifies exactly this log level, false if it specifies at least
+ * this log level.
+ *
+ * Return true if the string was successfully parsed as a log level string.
+ */
+static bool parse_log_level_string(const char *str,
+ enum lttng_event_rule_type event_rule_type,
+ int *log_level,
+ bool *log_level_only)
+{
+ bool ret;
+
+ switch (event_rule_type) {
+ case LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT:
+ {
+ enum lttng_loglevel log_level_min, log_level_max;
+ if (!loglevel_parse_range_string(
+ str, &log_level_min, &log_level_max)) {
+ goto error;
+ }
+
+ /* Only support VAL and VAL.. for now. */
+ if (log_level_min != log_level_max &&
+ log_level_max != LTTNG_LOGLEVEL_EMERG) {
+ goto error;
+ }
+
+ *log_level = (int) log_level_min;
+ *log_level_only = log_level_min == log_level_max;
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING:
+ {
+ enum lttng_loglevel_log4j log_level_min, log_level_max;
+ if (!loglevel_log4j_parse_range_string(
+ str, &log_level_min, &log_level_max)) {
+ goto error;
+ }
+
+ /* Only support VAL and VAL.. for now. */
+ if (log_level_min != log_level_max &&
+ log_level_max != LTTNG_LOGLEVEL_LOG4J_FATAL) {
+ goto error;
+ }
+
+ *log_level = (int) log_level_min;
+ *log_level_only = log_level_min == log_level_max;
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING:
+ {
+ enum lttng_loglevel_jul log_level_min, log_level_max;
+ if (!loglevel_jul_parse_range_string(
+ str, &log_level_min, &log_level_max)) {
+ goto error;
+ }
+
+ /* Only support VAL and VAL.. for now. */
+ if (log_level_min != log_level_max &&
+ log_level_max != LTTNG_LOGLEVEL_JUL_SEVERE) {
+ goto error;
+ }
+
+ *log_level = (int) log_level_min;
+ *log_level_only = log_level_min == log_level_max;
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING:
+ {
+ enum lttng_loglevel_python log_level_min, log_level_max;
+ if (!loglevel_python_parse_range_string(
+ str, &log_level_min, &log_level_max)) {
+ goto error;
+ }
+
+ /* Only support VAL and VAL.. for now. */
+ if (log_level_min != log_level_max &&
+ log_level_max !=
+ LTTNG_LOGLEVEL_PYTHON_CRITICAL) {
+ goto error;
+ }
+
+ *log_level = (int) log_level_min;
+ *log_level_only = log_level_min == log_level_max;
+ break;
+ }
+ default:
+ /* Invalid domain type. */
+ abort();
+ }
+
+ ret = true;
+ goto end;
+
+error:
+ ret = false;
+
+end:
+ return ret;
+}
+
+static int parse_kernel_probe_opts(const char *source,
+ struct lttng_kernel_probe_location **location)
+{
+ int ret = 0;
+ int match;
+ char s_hex[19];
+ char name[LTTNG_SYMBOL_NAME_LEN];
+ char *symbol_name = NULL;
+ uint64_t offset;
+
+ /* Check for symbol+offset. */
+ match = sscanf(source,
+ "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
+ "[^'+']+%18s",
+ name, s_hex);
+ if (match == 2) {
+ if (*s_hex == '\0') {
+ ERR("Kernel probe symbol offset is missing.");
+ goto error;
+ }
+
+ symbol_name = strndup(name, LTTNG_SYMBOL_NAME_LEN);
+ if (!symbol_name) {
+ PERROR("Failed to copy kernel probe location symbol name.");
+ goto error;
+ }
+ offset = strtoul(s_hex, NULL, 0);
+
+ *location = lttng_kernel_probe_location_symbol_create(
+ symbol_name, offset);
+ if (!*location) {
+ ERR("Failed to create symbol kernel probe location.");
+ goto error;
+ }
+
+ goto end;
+ }
+
+ /* Check for symbol. */
+ if (isalpha(name[0]) || name[0] == '_') {
+ match = sscanf(source,
+ "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
+ "s",
+ name);
+ if (match == 1) {
+ symbol_name = strndup(name, LTTNG_SYMBOL_NAME_LEN);
+ if (!symbol_name) {
+ ERR("Failed to copy kernel probe location symbol name.");
+ goto error;
+ }
+
+ *location = lttng_kernel_probe_location_symbol_create(
+ symbol_name, 0);
+ if (!*location) {
+ ERR("Failed to create symbol kernel probe location.");
+ goto error;
+ }
+
+ goto end;
+ }
+ }
+
+ /* Check for address. */
+ match = sscanf(source, "%18s", s_hex);
+ if (match > 0) {
+ uint64_t address;
+
+ if (*s_hex == '\0') {
+ ERR("Invalid kernel probe location address.");
+ goto error;
+ }
+
+ address = strtoul(s_hex, NULL, 0);
+ *location = lttng_kernel_probe_location_address_create(address);
+ if (!*location) {
+ ERR("Failed to create symbol kernel probe location.");
+ goto error;
+ }
+
+ goto end;
+ }
+
+error:
+ /* No match */
+ ret = -1;
+ *location = NULL;
+
+end:
+ free(symbol_name);
+ return ret;
+}
+
+static
+struct lttng_event_expr *ir_op_load_expr_to_event_expr(
+ const struct ir_load_expression *load_expr,
+ const char *capture_str)
+{
+ char *provider_name = NULL;
+ struct lttng_event_expr *event_expr = NULL;
+ const struct ir_load_expression_op *load_expr_op = load_expr->child;
+ const enum ir_load_expression_type load_expr_child_type =
+ load_expr_op->type;
+
+ switch (load_expr_child_type) {
+ case IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT:
+ case IR_LOAD_EXPRESSION_GET_CONTEXT_ROOT:
+ {
+ const char *field_name;
+
+ load_expr_op = load_expr_op->next;
+ LTTNG_ASSERT(load_expr_op);
+ LTTNG_ASSERT(load_expr_op->type == IR_LOAD_EXPRESSION_GET_SYMBOL);
+ field_name = load_expr_op->u.symbol;
+ LTTNG_ASSERT(field_name);
+
+ event_expr = load_expr_child_type == IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT ?
+ lttng_event_expr_event_payload_field_create(field_name) :
+ lttng_event_expr_channel_context_field_create(field_name);
+ if (!event_expr) {
+ ERR("Failed to create %s event expression: field name = `%s`.",
+ load_expr_child_type == IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT ?
+ "payload field" : "channel context",
+ field_name);
+ goto error;
+ }
+
+ break;
+ }
+ case IR_LOAD_EXPRESSION_GET_APP_CONTEXT_ROOT:
+ {
+ const char *colon;
+ const char *type_name;
+ const char *field_name;
+
+ load_expr_op = load_expr_op->next;
+ LTTNG_ASSERT(load_expr_op);
+ LTTNG_ASSERT(load_expr_op->type == IR_LOAD_EXPRESSION_GET_SYMBOL);
+ field_name = load_expr_op->u.symbol;
+ LTTNG_ASSERT(field_name);
+
+ /*
+ * The field name needs to be of the form PROVIDER:TYPE. We
+ * split it here.
+ */
+ colon = strchr(field_name, ':');
+ if (!colon) {
+ ERR("Invalid app-specific context field name: missing colon in `%s`.",
+ field_name);
+ goto error;
+ }
+
+ type_name = colon + 1;
+ if (*type_name == '\0') {
+ ERR("Invalid app-specific context field name: missing type name after colon in `%s`.",
+ field_name);
+ goto error;
+ }
+
+ provider_name = strndup(field_name, colon - field_name);
+ if (!provider_name) {
+ PERROR("Failed to allocate field name string");
+ goto error;
+ }
+
+ event_expr = lttng_event_expr_app_specific_context_field_create(
+ provider_name, type_name);
+ if (!event_expr) {
+ ERR("Failed to create app-specific context field event expression: provider name = `%s`, type name = `%s`",
+ provider_name, type_name);
+ goto error;
+ }
+
+ break;
+ }
+ default:
+ ERR("%s: unexpected load expr type %d.", __func__,
+ load_expr_op->type);
+ abort();
+ }
+
+ load_expr_op = load_expr_op->next;
+
+ /* There may be a single array index after that. */
+ if (load_expr_op->type == IR_LOAD_EXPRESSION_GET_INDEX) {
+ struct lttng_event_expr *index_event_expr;
+ const uint64_t index = load_expr_op->u.index;
+
+ index_event_expr = lttng_event_expr_array_field_element_create(event_expr, index);
+ if (!index_event_expr) {
+ ERR("Failed to create array field element event expression.");
+ goto error;
+ }
+
+ event_expr = index_event_expr;
+ load_expr_op = load_expr_op->next;
+ }
+
+ switch (load_expr_op->type) {
+ case IR_LOAD_EXPRESSION_LOAD_FIELD:
+ /*
+ * This is what we expect, IR_LOAD_EXPRESSION_LOAD_FIELD is
+ * always found at the end of the chain.
+ */
+ break;
+ case IR_LOAD_EXPRESSION_GET_SYMBOL:
+ ERR("While parsing expression `%s`: Capturing subfields is not supported.",
+ capture_str);
+ goto error;
+
+ default:
+ ERR("%s: unexpected load expression operator %s.", __func__,
+ ir_load_expression_type_str(load_expr_op->type));
+ abort();
+ }
+
+ goto end;
+
+error:
+ lttng_event_expr_destroy(event_expr);
+ event_expr = NULL;
+
+end:
+ free(provider_name);
+
+ return event_expr;
+}
+
+static
+struct lttng_event_expr *ir_op_load_to_event_expr(
+ const struct ir_op *ir, const char *capture_str)
+{
+ struct lttng_event_expr *event_expr = NULL;
+
+ LTTNG_ASSERT(ir->op == IR_OP_LOAD);
+
+ switch (ir->data_type) {
+ case IR_DATA_EXPRESSION:
+ {
+ const struct ir_load_expression *ir_load_expr =
+ ir->u.load.u.expression;
+
+ event_expr = ir_op_load_expr_to_event_expr(
+ ir_load_expr, capture_str);
+ break;
+ }
+ default:
+ ERR("%s: unexpected data type: %s.", __func__,
+ ir_data_type_str(ir->data_type));
+ abort();
+ }
+
+ return event_expr;
+}
+
+static
+const char *ir_operator_type_human_str(enum ir_op_type op)
+{
+ const char *name;
+
+ switch (op) {
+ case IR_OP_BINARY:
+ name = "Binary";
+ break;
+ case IR_OP_UNARY:
+ name = "Unary";
+ break;
+ case IR_OP_LOGICAL:
+ name = "Logical";
+ break;
+ default:
+ abort();
+ }
+
+ return name;
+}
+
+static
+struct lttng_event_expr *ir_op_root_to_event_expr(const struct ir_op *ir,
+ const char *capture_str)
+{
+ struct lttng_event_expr *event_expr = NULL;
+
+ LTTNG_ASSERT(ir->op == IR_OP_ROOT);
+ ir = ir->u.root.child;
+
+ switch (ir->op) {
+ case IR_OP_LOAD:
+ event_expr = ir_op_load_to_event_expr(ir, capture_str);
+ break;
+ case IR_OP_BINARY:
+ case IR_OP_UNARY:
+ case IR_OP_LOGICAL:
+ ERR("While parsing expression `%s`: %s operators are not allowed in capture expressions.",
+ capture_str,
+ ir_operator_type_human_str(ir->op));
+ break;
+ default:
+ ERR("%s: unexpected IR op type: %s.", __func__,
+ ir_op_type_str(ir->op));
+ abort();
+ }
+
+ return event_expr;
+}
+
+static
+void destroy_event_expr(void *ptr)
+{
+ lttng_event_expr_destroy((lttng_event_expr *) ptr);
+}
+
+struct parse_event_rule_res {
+ /* Owned by this. */
+ struct lttng_event_rule *er;
+
+ /* Array of `struct lttng_event_expr *` */
+ struct lttng_dynamic_pointer_array capture_descriptors;
+};
+
+static
+struct parse_event_rule_res parse_event_rule(int *argc, const char ***argv)
+{
+ enum lttng_event_rule_type event_rule_type =
+ LTTNG_EVENT_RULE_TYPE_UNKNOWN;
+ struct argpar_state *state;
+ struct argpar_item *item = NULL;
+ char *error = NULL;
+ int consumed_args = -1;
+ struct lttng_kernel_probe_location *kernel_probe_location = NULL;
+ struct lttng_userspace_probe_location *userspace_probe_location = NULL;
+ struct parse_event_rule_res res = { 0 };
+ struct lttng_event_expr *event_expr = NULL;
+ struct filter_parser_ctx *parser_ctx = NULL;
+ struct lttng_log_level_rule *log_level_rule = NULL;
+
+ /* Event rule type option */
+ char *event_rule_type_str = NULL;
+
+ /* Tracepoint and syscall options. */
+ char *name = NULL;
+ /* Array of strings. */
+ struct lttng_dynamic_pointer_array exclude_names;
+
+ /* For userspace / kernel probe and function. */
+ char *location = NULL;
+ char *event_name = NULL;
+
+ /* Filter. */
+ char *filter = NULL;
+
+ /* Log level. */
+ char *log_level_str = NULL;
+
+ lttng_dynamic_pointer_array_init(&res.capture_descriptors,
+ destroy_event_expr);
+
+ lttng_dynamic_pointer_array_init(&exclude_names, free);
+
+ state = argpar_state_create(*argc, *argv, event_rule_opt_descrs);
+ if (!state) {
+ ERR("Failed to allocate an argpar state.");
+ goto error;
+ }
+
+ while (true) {
+ enum argpar_state_parse_next_status status;
+
+ ARGPAR_ITEM_DESTROY_AND_RESET(item);
+ status = argpar_state_parse_next(state, &item, &error);
+ if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) {
+ ERR("%s", error);
+ goto error;
+ } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) {
+ /* Just stop parsing here. */
+ break;
+ } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) {
+ break;
+ }
+
+ LTTNG_ASSERT(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK);
+
+ if (item->type == ARGPAR_ITEM_TYPE_OPT) {
+ const struct argpar_item_opt *item_opt =
+ (const struct argpar_item_opt *) item;
+
+ switch (item_opt->descr->id) {
+ case OPT_TYPE:
+ if (!assign_event_rule_type(&event_rule_type,
+ item_opt->arg)) {
+ goto error;
+ }
+
+ /* Save the string for later use. */
+ if (!assign_string(&event_rule_type_str,
+ item_opt->arg,
+ "--type/-t")) {
+ goto error;
+ }
+
+ break;
+ case OPT_LOCATION:
+ if (!assign_string(&location,
+ item_opt->arg,
+ "--location/-L")) {
+ goto error;
+ }
+
+ break;
+ case OPT_EVENT_NAME:
+ if (!assign_string(&event_name,
+ item_opt->arg,
+ "--event-name/-E")) {
+ goto error;
+ }
+
+ break;
+ case OPT_FILTER:
+ if (!assign_string(&filter, item_opt->arg,
+ "--filter/-f")) {
+ goto error;
+ }
+
+ break;
+ case OPT_NAME:
+ if (!assign_string(&name, item_opt->arg,
+ "--name/-n")) {
+ goto error;
+ }
+
+ break;
+ case OPT_EXCLUDE_NAME:
+ {
+ int ret;
+
+ ret = lttng_dynamic_pointer_array_add_pointer(
+ &exclude_names,
+ strdup(item_opt->arg));
+ if (ret != 0) {
+ ERR("Failed to add pointer to dynamic pointer array.");
+ goto error;
+ }
+
+ break;
+ }
+ case OPT_LOG_LEVEL:
+ if (!assign_string(&log_level_str,
+ item_opt->arg, "--log-level/-l")) {
+ goto error;
+ }
+
+ break;
+ case OPT_CAPTURE:
+ {
+ int ret;
+ const char *capture_str = item_opt->arg;
+
+ ret = filter_parser_ctx_create_from_filter_expression(
+ capture_str, &parser_ctx);
+ if (ret) {
+ ERR("Failed to parse capture expression `%s`.",
+ capture_str);
+ goto error;
+ }
+
+ event_expr = ir_op_root_to_event_expr(
+ parser_ctx->ir_root,
+ capture_str);
+ if (!event_expr) {
+ /*
+ * ir_op_root_to_event_expr has printed
+ * an error message.
+ */
+ goto error;
+ }
+
+ ret = lttng_dynamic_pointer_array_add_pointer(
+ &res.capture_descriptors,
+ event_expr);
+ if (ret) {
+ goto error;
+ }
+
+ /*
+ * The ownership of event expression was
+ * transferred to the dynamic array.
+ */
+ event_expr = NULL;
+
+ break;
+ }
+ default:
+ abort();
+ }
+ } else {
+ const struct argpar_item_non_opt *item_non_opt =
+ (const struct argpar_item_non_opt *)
+ item;
+
+ /* Don't accept non-option arguments. */
+ ERR("Unexpected argument '%s'", item_non_opt->arg);
+ goto error;
+ }
+ }
+
+ if (event_rule_type == LTTNG_EVENT_RULE_TYPE_UNKNOWN) {
+ ERR("Event rule requires a --type.");
+ goto error;
+ }
+
+ /*
+ * Option --name is applicable to event rules of type kernel, user, jul,
+ * log4j,python and syscall. If --name is omitted, it is implicitly
+ * "*".
+ */
+ switch (event_rule_type) {
+ case LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT:
+ case LTTNG_EVENT_RULE_TYPE_KERNEL_TRACEPOINT:
+ case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING:
+ case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING:
+ case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING:
+ case LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL:
+ if (!name) {
+ name = strdup("*");
+ }
+ break;
+
+ default:
+ if (name) {
+ ERR("Can't use --name with %s event rules.",
+ lttng_event_rule_type_str(
+ event_rule_type));
+ goto error;
+ }
+
+ if (lttng_dynamic_pointer_array_get_count(&exclude_names) > 0) {
+ ERR("Can't use --exclude-name/-x with %s event rules.",
+ lttng_event_rule_type_str(
+ event_rule_type));
+ goto error;
+ }
+ }
+
+ /*
+ * Option --location is only applicable to (and mandatory for) event
+ * rules of type {k,u}probe and function.
+ *
+ * Option --event-name is only applicable to event rules of type probe.
+ * If omitted, it defaults to the location.
+ */
+ switch (event_rule_type) {
+ case LTTNG_EVENT_RULE_TYPE_KERNEL_KPROBE:
+ case LTTNG_EVENT_RULE_TYPE_KERNEL_UPROBE:
+ if (!location) {
+ ERR("Event rule of type %s requires a --location.",
+ lttng_event_rule_type_str(event_rule_type));
+ goto error;
+ }
+
+ if (!event_name) {
+ event_name = strdup(location);
+ }
+
+ break;
+
+ default:
+ if (location) {
+ ERR("Can't use --location with %s event rules.",
+ lttng_event_rule_type_str(event_rule_type));
+ goto error;
+ }
+
+ if (event_name) {
+ ERR("Can't use --event-name with %s event rules.",
+ lttng_event_rule_type_str(
+ event_rule_type));
+ goto error;
+ }
+ }
+
+ /*
+ * Update *argc and *argv so our caller can keep parsing what follows.
+ */
+ consumed_args = argpar_state_get_ingested_orig_args(state);
+ LTTNG_ASSERT(consumed_args >= 0);
+ *argc -= consumed_args;
+ *argv += consumed_args;
+
+ /*
+ * Adding a filter to a probe, function or userspace-probe would be
+ * denied by the kernel tracer as it's not supported at the moment. We
+ * do an early check here to warn the user.
+ */
+ if (filter) {
+ switch (event_rule_type) {
+ case LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT:
+ case LTTNG_EVENT_RULE_TYPE_KERNEL_TRACEPOINT:
+ case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING:
+ case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING:
+ case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING:
+ case LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL:
+ break;
+ default:
+ ERR("Filter expressions are not supported for %s event rules.",
+ lttng_event_rule_type_str(event_rule_type));
+ goto error;
+ }
+ }
+
+ /*
+ * If --exclude-name/-x was passed, split it into an exclusion list.
+ * Exclusions are only supported by
+ * LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT for now.
+ */
+ if (lttng_dynamic_pointer_array_get_count(&exclude_names) > 0) {
+ if (event_rule_type != LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT) {
+ ERR("Event name exclusions are not yet implemented for %s event rules.",
+ lttng_event_rule_type_str(event_rule_type));
+ goto error;
+ }
+
+ if (validate_exclusion_list(name, &exclude_names) != 0) {
+ /*
+ * Assume validate_exclusion_list already prints an
+ * error message.
+ */
+ goto error;
+ }
+ }
+
+ if (log_level_str) {
+ switch (event_rule_type) {
+ case LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT:
+ case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING:
+ case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING:
+ case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING:
+ {
+ int log_level;
+ bool log_level_only;
+
+ if (strcmp(log_level_str, "..") == 0) {
+ /*
+ * ".." is the same as passing no log level
+ * option and correspond to the "ANY" case.
+ */
+ break;
+ }
+
+ if (!parse_log_level_string(log_level_str, event_rule_type,
+ &log_level, &log_level_only)) {
+ ERR("Failed to parse log level string `%s`.",
+ log_level_str);
+ goto error;
+ }
+
+ if (log_level_only) {
+ log_level_rule = lttng_log_level_rule_exactly_create(log_level);
+ } else {
+ log_level_rule = lttng_log_level_rule_at_least_as_severe_as_create(log_level);
+ }
+
+ if (log_level_rule == NULL) {
+ ERR("Failed to create log level rule object.");
+ goto error;
+ }
+ break;
+ }
+ default:
+ ERR("Log levels are not supported for %s event rules.",
+ lttng_event_rule_type_str(event_rule_type));
+ goto error;
+ }
+ }
+
+ /* Finally, create the event rule object. */
+ switch (event_rule_type) {
+ case LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT:
+ {
+ enum lttng_event_rule_status event_rule_status;
+
+ res.er = lttng_event_rule_user_tracepoint_create();
+ if (!res.er) {
+ ERR("Failed to create user_tracepoint event rule.");
+ goto error;
+ }
+
+ /* Set pattern. */
+ event_rule_status = lttng_event_rule_user_tracepoint_set_name_pattern(
+ res.er, name);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set user_tracepoint event rule's pattern to '%s'.",
+ name);
+ goto error;
+ }
+
+ /* Set filter. */
+ if (filter) {
+ event_rule_status = lttng_event_rule_user_tracepoint_set_filter(
+ res.er, filter);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set user_tracepoint event rule's filter to '%s'.",
+ filter);
+ goto error;
+ }
+ }
+
+ /* Set exclusion list. */
+ if (lttng_dynamic_pointer_array_get_count(&exclude_names) > 0) {
+ int n;
+ int count = lttng_dynamic_pointer_array_get_count(
+ &exclude_names);
+
+ for (n = 0; n < count; n++) {
+ const char *exclude_name =
+ (const char *) lttng_dynamic_pointer_array_get_pointer(
+ &exclude_names,
+ n);
+
+ event_rule_status =
+ lttng_event_rule_user_tracepoint_add_name_pattern_exclusion(
+ res.er,
+ exclude_name);
+ if (event_rule_status !=
+ LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set user_tracepoint exclusion list element '%s'",
+ exclude_name);
+ goto error;
+ }
+ }
+ }
+
+ if (log_level_rule) {
+ event_rule_status =
+ lttng_event_rule_user_tracepoint_set_log_level_rule(
+ res.er, log_level_rule);
+
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set log level on event fule.");
+ goto error;
+ }
+ }
+
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_KERNEL_TRACEPOINT:
+ {
+ enum lttng_event_rule_status event_rule_status;
+
+ res.er = lttng_event_rule_kernel_tracepoint_create();
+ if (!res.er) {
+ ERR("Failed to create kernel_tracepoint event rule.");
+ goto error;
+ }
+
+ /* Set pattern. */
+ event_rule_status = lttng_event_rule_kernel_tracepoint_set_name_pattern(
+ res.er, name);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set kernel_tracepoint event rule's pattern to '%s'.",
+ name);
+ goto error;
+ }
+
+ /* Set filter. */
+ if (filter) {
+ event_rule_status = lttng_event_rule_kernel_tracepoint_set_filter(
+ res.er, filter);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set kernel_tracepoint event rule's filter to '%s'.",
+ filter);
+ goto error;
+ }
+ }
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING:
+ {
+ enum lttng_event_rule_status event_rule_status;
+
+ res.er = lttng_event_rule_jul_logging_create();
+ if (!res.er) {
+ ERR("Failed to create jul_logging event rule.");
+ goto error;
+ }
+
+ /* Set pattern. */
+ event_rule_status = lttng_event_rule_jul_logging_set_name_pattern(
+ res.er, name);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set jul_logging event rule's pattern to '%s'.",
+ name);
+ goto error;
+ }
+
+ /* Set filter. */
+ if (filter) {
+ event_rule_status = lttng_event_rule_jul_logging_set_filter(
+ res.er, filter);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set jul_logging event rule's filter to '%s'.",
+ filter);
+ goto error;
+ }
+ }
+
+ if (log_level_rule) {
+ event_rule_status =
+ lttng_event_rule_jul_logging_set_log_level_rule(
+ res.er, log_level_rule);
+
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set log level on event fule.");
+ goto error;
+ }
+ }
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING:
+ {
+ enum lttng_event_rule_status event_rule_status;
+
+ res.er = lttng_event_rule_log4j_logging_create();
+ if (!res.er) {
+ ERR("Failed to create jul_logging event rule.");
+ goto error;
+ }
+
+ /* Set pattern. */
+ event_rule_status = lttng_event_rule_log4j_logging_set_name_pattern(
+ res.er, name);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set jul_logging event rule's pattern to '%s'.",
+ name);
+ goto error;
+ }
+
+ /* Set filter. */
+ if (filter) {
+ event_rule_status = lttng_event_rule_log4j_logging_set_filter(
+ res.er, filter);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set jul_logging event rule's filter to '%s'.",
+ filter);
+ goto error;
+ }
+ }
+
+ if (log_level_rule) {
+ event_rule_status =
+ lttng_event_rule_log4j_logging_set_log_level_rule(
+ res.er, log_level_rule);
+
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set log level on event fule.");
+ goto error;
+ }
+ }
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING:
+ {
+ enum lttng_event_rule_status event_rule_status;
+
+ res.er = lttng_event_rule_python_logging_create();
+ if (!res.er) {
+ ERR("Failed to create jul_logging event rule.");
+ goto error;
+ }
+
+ /* Set pattern. */
+ event_rule_status = lttng_event_rule_python_logging_set_name_pattern(
+ res.er, name);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set jul_logging event rule's pattern to '%s'.",
+ name);
+ goto error;
+ }
+
+ /* Set filter. */
+ if (filter) {
+ event_rule_status = lttng_event_rule_python_logging_set_filter(
+ res.er, filter);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set jul_logging event rule's filter to '%s'.",
+ filter);
+ goto error;
+ }
+ }
+
+ if (log_level_rule) {
+ event_rule_status =
+ lttng_event_rule_python_logging_set_log_level_rule(
+ res.er, log_level_rule);
+
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set log level on event fule.");
+ goto error;
+ }
+ }
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_KERNEL_KPROBE:
+ {
+ int ret;
+ enum lttng_event_rule_status event_rule_status;
+
+ ret = parse_kernel_probe_opts(
+ location, &kernel_probe_location);
+ if (ret) {
+ ERR("Failed to parse kernel probe location.");
+ goto error;
+ }
+
+ LTTNG_ASSERT(kernel_probe_location);
+ res.er = lttng_event_rule_kernel_kprobe_create(kernel_probe_location);
+ if (!res.er) {
+ ERR("Failed to create kprobe event rule.");
+ goto error;
+ }
+
+ event_rule_status =
+ lttng_event_rule_kernel_kprobe_set_event_name(
+ res.er, event_name);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set kprobe event rule's name to '%s'.",
+ event_name);
+ goto error;
+ }
+
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_KERNEL_UPROBE:
+ {
+ int ret;
+ enum lttng_event_rule_status event_rule_status;
+
+ ret = parse_userspace_probe_opts(
+ location, &userspace_probe_location);
+ if (ret) {
+ ERR("Failed to parse user space probe location.");
+ goto error;
+ }
+
+ res.er = lttng_event_rule_kernel_uprobe_create(userspace_probe_location);
+ if (!res.er) {
+ ERR("Failed to create userspace probe event rule.");
+ goto error;
+ }
+
+ event_rule_status =
+ lttng_event_rule_kernel_uprobe_set_event_name(
+ res.er, event_name);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set user space probe event rule's name to '%s'.",
+ event_name);
+ goto error;
+ }
+
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL:
+ {
+ enum lttng_event_rule_status event_rule_status;
+ enum lttng_event_rule_kernel_syscall_emission_site emission_site;
+
+ if (!parse_syscall_emission_site_from_type(
+ event_rule_type_str, &emission_site)) {
+ ERR("Failed to parse syscall type '%s'.", event_rule_type_str);
+ goto error;
+ }
+
+ res.er = lttng_event_rule_kernel_syscall_create(emission_site);
+ if (!res.er) {
+ ERR("Failed to create syscall event rule.");
+ goto error;
+ }
+
+ event_rule_status = lttng_event_rule_kernel_syscall_set_name_pattern(
+ res.er, name);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set syscall event rule's pattern to '%s'.",
+ name);
+ goto error;
+ }
+
+ if (filter) {
+ event_rule_status = lttng_event_rule_kernel_syscall_set_filter(
+ res.er, filter);
+ if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set syscall event rule's filter to '%s'.",
+ filter);
+ goto error;
+ }
+ }
+
+ break;
+ }
+ default:
+ abort();
+ goto error;
+ }
+
+ goto end;
+
+error:
+ lttng_event_rule_destroy(res.er);
+ res.er = NULL;
+ lttng_dynamic_pointer_array_reset(&res.capture_descriptors);
+
+end:
+ if (parser_ctx) {
+ filter_parser_ctx_free(parser_ctx);
+ }
+
+ lttng_event_expr_destroy(event_expr);
+ argpar_item_destroy(item);
+ free(error);
+ argpar_state_destroy(state);
+ free(filter);
+ free(name);
+ lttng_dynamic_pointer_array_reset(&exclude_names);
+ free(log_level_str);
+ free(location);
+ free(event_name);
+ free(event_rule_type_str);
+
+ lttng_kernel_probe_location_destroy(kernel_probe_location);
+ lttng_userspace_probe_location_destroy(userspace_probe_location);
+ lttng_log_level_rule_destroy(log_level_rule);
+ return res;
+}
+
+static
+struct lttng_condition *handle_condition_event(int *argc, const char ***argv)
+{
+ struct parse_event_rule_res res;
+ struct lttng_condition *c;
+ size_t i;
+
+ res = parse_event_rule(argc, argv);
+ if (!res.er) {
+ c = NULL;
+ goto error;
+ }
+
+ c = lttng_condition_event_rule_matches_create(res.er);
+ lttng_event_rule_destroy(res.er);
+ res.er = NULL;
+ if (!c) {
+ goto error;
+ }
+
+ for (i = 0; i < lttng_dynamic_pointer_array_get_count(&res.capture_descriptors);
+ i++) {
+ enum lttng_condition_status status;
+ struct lttng_event_expr **expr =
+ (lttng_event_expr **) lttng_dynamic_array_get_element(
+ &res.capture_descriptors.array, i);
+
+ LTTNG_ASSERT(expr);
+ LTTNG_ASSERT(*expr);
+ status = lttng_condition_event_rule_matches_append_capture_descriptor(
+ c, *expr);
+ if (status != LTTNG_CONDITION_STATUS_OK) {
+ if (status == LTTNG_CONDITION_STATUS_UNSUPPORTED) {
+ ERR("The capture feature is unsupported by the event-rule condition type");
+ }
+
+ goto error;
+ }
+
+ /* Ownership of event expression moved to `c` */
+ *expr = NULL;
+ }
+
+ goto end;
+
+error:
+ lttng_condition_destroy(c);
+ c = NULL;
+
+end:
+ lttng_dynamic_pointer_array_reset(&res.capture_descriptors);
+ lttng_event_rule_destroy(res.er);
+ return c;
+}
+
+struct condition_descr {
+ const char *name;
+ struct lttng_condition *(*handler) (int *argc, const char ***argv);
+};
+
+static const
+struct condition_descr condition_descrs[] = {
+ { "event-rule-matches", handle_condition_event },
+};
+
+static
+struct lttng_condition *parse_condition(const char *condition_name, int *argc,
+ const char ***argv)
+{
+ int i;
+ struct lttng_condition *cond;
+ const struct condition_descr *descr = NULL;
+
+ for (i = 0; i < ARRAY_SIZE(condition_descrs); i++) {
+ if (strcmp(condition_name, condition_descrs[i].name) == 0) {
+ descr = &condition_descrs[i];
+ break;
+ }
+ }
+
+ if (!descr) {
+ ERR("Unknown condition name '%s'", condition_name);
+ goto error;
+ }
+
+ cond = descr->handler(argc, argv);
+ if (!cond) {
+ /* The handler has already printed an error message. */
+ goto error;
+ }
+
+ goto end;
+error:
+ cond = NULL;
+end:
+ return cond;
+}
+
+static struct lttng_rate_policy *parse_rate_policy(const char *policy_str)
+{
+ int ret;
+ size_t num_token = 0;
+ struct lttng_dynamic_pointer_array tokens;
+ struct lttng_rate_policy *policy = NULL;
+ enum lttng_rate_policy_type policy_type;
+ unsigned long long value;
+ char *policy_type_str;
+ char *policy_value_str;
+
+ LTTNG_ASSERT(policy_str);
+ lttng_dynamic_pointer_array_init(&tokens, NULL);
+
+ /* Rate policy fields are separated by ':'. */
+ ret = strutils_split(policy_str, ':', 1, &tokens);
+ if (ret == 0) {
+ num_token = lttng_dynamic_pointer_array_get_count(&tokens);
+ }
+
+ /*
+ * Early sanity check that the number of parameter is exactly 2.
+ * i.e : type:value
+ */
+ if (num_token != 2) {
+ ERR("Rate policy format is invalid.");
+ goto end;
+ }
+
+ policy_type_str = (char *) lttng_dynamic_pointer_array_get_pointer(&tokens, 0);
+ policy_value_str = (char *) lttng_dynamic_pointer_array_get_pointer(&tokens, 1);
+
+ /* Parse the type. */
+ if (strcmp(policy_type_str, "once-after") == 0) {
+ policy_type = LTTNG_RATE_POLICY_TYPE_ONCE_AFTER_N;
+ } else if (strcmp(policy_type_str, "every") == 0) {
+ policy_type = LTTNG_RATE_POLICY_TYPE_EVERY_N;
+ } else {
+ ERR("Rate policy type `%s` unknown.", policy_type_str);
+ goto end;
+ }
+
+ /* Parse the value. */
+ if (utils_parse_unsigned_long_long(policy_value_str, &value) != 0) {
+ ERR("Failed to parse rate policy value `%s` as an integer.",
+ policy_value_str);
+ goto end;
+ }
+
+ if (value == 0) {
+ ERR("Rate policy value `%s` must be > 0.", policy_value_str);
+ goto end;
+ }
+
+ switch (policy_type) {
+ case LTTNG_RATE_POLICY_TYPE_EVERY_N:
+ policy = lttng_rate_policy_every_n_create(value);
+ break;
+ case LTTNG_RATE_POLICY_TYPE_ONCE_AFTER_N:
+ policy = lttng_rate_policy_once_after_n_create(value);
+ break;
+ default:
+ abort();
+ }
+
+ if (policy == NULL) {
+ ERR("Failed to create rate policy `%s`.", policy_str);
+ }
+
+end:
+ lttng_dynamic_pointer_array_reset(&tokens);
+ return policy;
+}
+
+static const struct argpar_opt_descr notify_action_opt_descrs[] = {
+ { OPT_RATE_POLICY, '\0', "rate-policy", true },
+ ARGPAR_OPT_DESCR_SENTINEL
+};
+
+static
+struct lttng_action *handle_action_notify(int *argc, const char ***argv)
+{
+ struct lttng_action *action = NULL;
+ struct argpar_state *state = NULL;
+ struct argpar_item *item = NULL;
+ char *error = NULL;
+ struct lttng_rate_policy *policy = NULL;
+
+ state = argpar_state_create(*argc, *argv, notify_action_opt_descrs);
+ if (!state) {
+ ERR("Failed to allocate an argpar state.");
+ goto error;
+ }
+
+ while (true) {
+ enum argpar_state_parse_next_status status;
+
+ ARGPAR_ITEM_DESTROY_AND_RESET(item);
+ status = argpar_state_parse_next(state, &item, &error);
+ if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) {
+ ERR("%s", error);
+ goto error;
+ } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) {
+ /* Just stop parsing here. */
+ break;
+ } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) {
+ break;
+ }
+
+ LTTNG_ASSERT(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK);
+
+ if (item->type == ARGPAR_ITEM_TYPE_OPT) {
+ const struct argpar_item_opt *item_opt =
+ (const struct argpar_item_opt *) item;
+
+ switch (item_opt->descr->id) {
+ case OPT_RATE_POLICY:
+ {
+ policy = parse_rate_policy(item_opt->arg);
+ if (!policy) {
+ goto error;
+ }
+ break;
+ }
+ default:
+ abort();
+ }
+ } else {
+ const struct argpar_item_non_opt *item_non_opt;
+
+ LTTNG_ASSERT(item->type == ARGPAR_ITEM_TYPE_NON_OPT);
+
+ item_non_opt = (const struct argpar_item_non_opt *) item;
+
+ switch (item_non_opt->non_opt_index) {
+ default:
+ ERR("Unexpected argument `%s`.",
+ item_non_opt->arg);
+ goto error;
+ }
+ }
+ }
+
+ *argc -= argpar_state_get_ingested_orig_args(state);
+ *argv += argpar_state_get_ingested_orig_args(state);
+
+ action = lttng_action_notify_create();
+ if (!action) {
+ ERR("Failed to create notify action");
+ goto error;
+ }
+
+ if (policy) {
+ enum lttng_action_status status;
+ status = lttng_action_notify_set_rate_policy(action, policy);
+ if (status != LTTNG_ACTION_STATUS_OK) {
+ ERR("Failed to set rate policy");
+ goto error;
+ }
+ }
+
+ goto end;
+
+error:
+ lttng_action_destroy(action);
+ action = NULL;
+end:
+ free(error);
+ lttng_rate_policy_destroy(policy);
+ argpar_state_destroy(state);
+ argpar_item_destroy(item);
+ return action;
+}
+
+/*
+ * Generic handler for a kind of action that takes a session name and an
+ * optional rate policy.
+ */
+
+static struct lttng_action *handle_action_simple_session_with_policy(int *argc,
+ const char ***argv,
+ struct lttng_action *(*create_action_cb)(void),
+ enum lttng_action_status (*set_session_name_cb)(
+ struct lttng_action *, const char *),
+ enum lttng_action_status (*set_rate_policy_cb)(
+ struct lttng_action *,
+ const struct lttng_rate_policy *),
+ const char *action_name)
+{
+ struct lttng_action *action = NULL;
+ struct argpar_state *state = NULL;
+ struct argpar_item *item = NULL;
+ const char *session_name_arg = NULL;
+ char *error = NULL;
+ enum lttng_action_status action_status;
+ struct lttng_rate_policy *policy = NULL;
+
+ LTTNG_ASSERT(set_session_name_cb);
+ LTTNG_ASSERT(set_rate_policy_cb);
+
+ const struct argpar_opt_descr rate_policy_opt_descrs[] = {
+ { OPT_RATE_POLICY, '\0', "rate-policy", true },
+ ARGPAR_OPT_DESCR_SENTINEL
+ };
+
+ state = argpar_state_create(*argc, *argv, rate_policy_opt_descrs);
+ if (!state) {
+ ERR("Failed to allocate an argpar state.");
+ goto error;
+ }
+
+ while (true) {
+ enum argpar_state_parse_next_status status;
+
+ ARGPAR_ITEM_DESTROY_AND_RESET(item);
+ status = argpar_state_parse_next(state, &item, &error);
+ if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) {
+ ERR("%s", error);
+ goto error;
+ } else if (status ==
+ ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) {
+ /* Just stop parsing here. */
+ break;
+ } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) {
+ break;
+ }
+
+ LTTNG_ASSERT(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK);
+ if (item->type == ARGPAR_ITEM_TYPE_OPT) {
+ const struct argpar_item_opt *item_opt =
+ (const struct argpar_item_opt *) item;
+
+ switch (item_opt->descr->id) {
+ case OPT_RATE_POLICY:
+ {
+ policy = parse_rate_policy(item_opt->arg);
+ if (!policy) {
+ goto error;
+ }
+ break;
+ }
+ default:
+ abort();
+ }
+ } else {
+ const struct argpar_item_non_opt *item_non_opt;
+ item_non_opt = (const struct argpar_item_non_opt *) item;
+
+ switch (item_non_opt->non_opt_index) {
+ case 0:
+ session_name_arg = item_non_opt->arg;
+ break;
+ default:
+ ERR("Unexpected argument `%s`.",
+ item_non_opt->arg);
+ goto error;
+ }
+ }
+ }
+
+ *argc -= argpar_state_get_ingested_orig_args(state);
+ *argv += argpar_state_get_ingested_orig_args(state);
+
+ if (!session_name_arg) {
+ ERR("Missing session name.");
+ goto error;
+ }
+
+ action = create_action_cb();
+ if (!action) {
+ ERR("Failed to allocate %s session action.", action_name);
+ goto error;
+ }
+
+ action_status = set_session_name_cb(action, session_name_arg);
+ if (action_status != LTTNG_ACTION_STATUS_OK) {
+ ERR("Failed to set action %s session's session name to '%s'.",
+ action_name, session_name_arg);
+ goto error;
+ }
+
+ if (policy) {
+ action_status = set_rate_policy_cb(action, policy);
+ if (action_status != LTTNG_ACTION_STATUS_OK) {
+ ERR("Failed to set rate policy");
+ goto error;
+ }
+ }
+
+ goto end;
+
+error:
+ lttng_action_destroy(action);
+ action = NULL;
+ argpar_item_destroy(item);
+end:
+ lttng_rate_policy_destroy(policy);
+ free(error);
+ argpar_state_destroy(state);
+ return action;
+}
+
+static
+struct lttng_action *handle_action_start_session(int *argc,
+ const char ***argv)
+{
+ return handle_action_simple_session_with_policy(argc, argv,
+ lttng_action_start_session_create,
+ lttng_action_start_session_set_session_name,
+ lttng_action_start_session_set_rate_policy, "start");
+}
+
+static
+struct lttng_action *handle_action_stop_session(int *argc,
+ const char ***argv)
+{
+ return handle_action_simple_session_with_policy(argc, argv,
+ lttng_action_stop_session_create,
+ lttng_action_stop_session_set_session_name,
+ lttng_action_stop_session_set_rate_policy, "stop");
+}
+
+static
+struct lttng_action *handle_action_rotate_session(int *argc,
+ const char ***argv)
+{
+ return handle_action_simple_session_with_policy(argc, argv,
+ lttng_action_rotate_session_create,
+ lttng_action_rotate_session_set_session_name,
+ lttng_action_rotate_session_set_rate_policy,
+ "rotate");
+}
+
+static const struct argpar_opt_descr snapshot_action_opt_descrs[] = {
+ { OPT_NAME, 'n', "name", true },
+ { OPT_MAX_SIZE, 'm', "max-size", true },
+ { OPT_CTRL_URL, '\0', "ctrl-url", true },
+ { OPT_DATA_URL, '\0', "data-url", true },
+ { OPT_URL, '\0', "url", true },
+ { OPT_PATH, '\0', "path", true },
+ { OPT_RATE_POLICY, '\0', "rate-policy", true },
+ ARGPAR_OPT_DESCR_SENTINEL
+};
+
+static
+struct lttng_action *handle_action_snapshot_session(int *argc,
+ const char ***argv)
+{
+ struct lttng_action *action = NULL;
+ struct argpar_state *state = NULL;
+ struct argpar_item *item = NULL;
+ const char *session_name_arg = NULL;
+ char *snapshot_name_arg = NULL;
+ char *ctrl_url_arg = NULL;
+ char *data_url_arg = NULL;
+ char *max_size_arg = NULL;
+ char *url_arg = NULL;
+ char *path_arg = NULL;
+ char *error = NULL;
+ enum lttng_action_status action_status;
+ struct lttng_snapshot_output *snapshot_output = NULL;
+ struct lttng_rate_policy *policy = NULL;
+ int ret;
+ unsigned int locations_specified = 0;
+
+ state = argpar_state_create(*argc, *argv, snapshot_action_opt_descrs);
+ if (!state) {
+ ERR("Failed to allocate an argpar state.");
+ goto error;
+ }
+
+ while (true) {
+ enum argpar_state_parse_next_status status;
+
+ ARGPAR_ITEM_DESTROY_AND_RESET(item);
+ status = argpar_state_parse_next(state, &item, &error);
+ if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) {
+ ERR("%s", error);
+ goto error;
+ } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) {
+ /* Just stop parsing here. */
+ break;
+ } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) {
+ break;
+ }
+
+ LTTNG_ASSERT(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK);
+
+ if (item->type == ARGPAR_ITEM_TYPE_OPT) {
+ const struct argpar_item_opt *item_opt =
+ (const struct argpar_item_opt *) item;
+
+ switch (item_opt->descr->id) {
+ case OPT_NAME:
+ if (!assign_string(&snapshot_name_arg, item_opt->arg, "--name/-n")) {
+ goto error;
+ }
+
+ break;
+ case OPT_MAX_SIZE:
+ if (!assign_string(&max_size_arg, item_opt->arg, "--max-size/-m")) {
+ goto error;
+ }
+
+ break;
+ case OPT_CTRL_URL:
+ if (!assign_string(&ctrl_url_arg, item_opt->arg, "--ctrl-url")) {
+ goto error;
+ }
+
+ break;
+ case OPT_DATA_URL:
+ if (!assign_string(&data_url_arg, item_opt->arg, "--data-url")) {
+ goto error;
+ }
+
+ break;
+ case OPT_URL:
+ if (!assign_string(&url_arg, item_opt->arg, "--url")) {
+ goto error;
+ }
+
+ break;
+ case OPT_PATH:
+ if (!assign_string(&path_arg, item_opt->arg, "--path")) {
+ goto error;
+ }
+
+ break;
+ case OPT_RATE_POLICY:
+ {
+ policy = parse_rate_policy(item_opt->arg);
+ if (!policy) {
+ goto error;
+ }
+ break;
+ }
+ default:
+ abort();
+ }
+ } else {
+ const struct argpar_item_non_opt *item_non_opt;
+
+ LTTNG_ASSERT(item->type == ARGPAR_ITEM_TYPE_NON_OPT);
+
+ item_non_opt = (const struct argpar_item_non_opt *) item;
+
+ switch (item_non_opt->non_opt_index) {
+ case 0:
+ session_name_arg = item_non_opt->arg;
+ break;
+ default:
+ ERR("Unexpected argument `%s`.",
+ item_non_opt->arg);
+ goto error;
+ }
+ }
+ }
+
+ *argc -= argpar_state_get_ingested_orig_args(state);
+ *argv += argpar_state_get_ingested_orig_args(state);
+
+ if (!session_name_arg) {
+ ERR("Missing session name.");
+ goto error;
+ }
+
+ /* --ctrl-url and --data-url must come in pair. */
+ if (ctrl_url_arg && !data_url_arg) {
+ ERR("--ctrl-url is specified, but --data-url is missing.");
+ goto error;
+ }
+
+ if (!ctrl_url_arg && data_url_arg) {
+ ERR("--data-url is specified, but --ctrl-url is missing.");
+ goto error;
+ }
+
+ locations_specified += !!(ctrl_url_arg || data_url_arg);
+ locations_specified += !!url_arg;
+ locations_specified += !!path_arg;
+
+ /* --ctrl-url/--data-url, --url and --path are mutually exclusive. */
+ if (locations_specified > 1) {
+ ERR("The --ctrl-url/--data-url, --url, and --path options can't be used together.");
+ goto error;
+ }
+
+ /*
+ * Did the user specify an option that implies using a
+ * custom/unregistered output?
+ */
+ if (url_arg || ctrl_url_arg || path_arg) {
+ snapshot_output = lttng_snapshot_output_create();
+ if (!snapshot_output) {
+ ERR("Failed to allocate a snapshot output.");
+ goto error;
+ }
+ }
+
+ action = lttng_action_snapshot_session_create();
+ if (!action) {
+ ERR("Failed to allocate snapshot session action.");
+ goto error;
+ }
+
+ action_status = lttng_action_snapshot_session_set_session_name(
+ action, session_name_arg);
+ if (action_status != LTTNG_ACTION_STATUS_OK) {
+ ERR("Failed to set action snapshot session's session name to '%s'.",
+ session_name_arg);
+ goto error;
+ }
+
+ if (snapshot_name_arg) {
+ if (!snapshot_output) {
+ ERR("Can't provide a snapshot output name without a snapshot output destination.");
+ goto error;
+ }
+
+ ret = lttng_snapshot_output_set_name(
+ snapshot_name_arg, snapshot_output);
+ if (ret != 0) {
+ ERR("Failed to set name of snapshot output.");
+ goto error;
+ }
+ }
+
+ if (max_size_arg) {
+ uint64_t max_size;
+
+ if (!snapshot_output) {
+ ERR("Can't provide a snapshot output max size without a snapshot output destination.");
+ goto error;
+ }
+
+ ret = utils_parse_size_suffix(max_size_arg, &max_size);
+ if (ret != 0) {
+ ERR("Failed to parse `%s` as a size.", max_size_arg);
+ goto error;
+ }
+
+ ret = lttng_snapshot_output_set_size(max_size, snapshot_output);
+ if (ret != 0) {
+ ERR("Failed to set snapshot output's max size to %" PRIu64 " bytes.",
+ max_size);
+ goto error;
+ }
+ }
+
+ if (url_arg) {
+ int num_uris;
+ struct lttng_uri *uris;
+
+ if (!strstr(url_arg, "://")) {
+ ERR("Failed to parse '%s' as an URL.", url_arg);
+ goto error;
+ }
+
+ num_uris = uri_parse_str_urls(url_arg, NULL, &uris);
+ if (num_uris < 1) {
+ ERR("Failed to parse '%s' as an URL.", url_arg);
+ goto error;
+ }
+
+ if (uris[0].dtype == LTTNG_DST_PATH) {
+ ret = lttng_snapshot_output_set_local_path(
+ uris[0].dst.path, snapshot_output);
+ free(uris);
+ if (ret != 0) {
+ ERR("Failed to assign '%s' as a local destination.",
+ url_arg);
+ goto error;
+ }
+ } else {
+ ret = lttng_snapshot_output_set_network_url(
+ url_arg, snapshot_output);
+ free(uris);
+ if (ret != 0) {
+ ERR("Failed to assign '%s' as a network URL.",
+ url_arg);
+ goto error;
+ }
+ }
+ }
+
+ if (path_arg) {
+ ret = lttng_snapshot_output_set_local_path(
+ path_arg, snapshot_output);
+ if (ret != 0) {
+ ERR("Failed to parse '%s' as a local path.", path_arg);
+ goto error;
+ }
+ }
+
+ if (ctrl_url_arg) {
+ /*
+ * Two argument form, network output with separate control and
+ * data URLs.
+ */
+ ret = lttng_snapshot_output_set_network_urls(
+ ctrl_url_arg, data_url_arg, snapshot_output);
+ if (ret != 0) {
+ ERR("Failed to parse `%s` and `%s` as control and data URLs.",
+ ctrl_url_arg, data_url_arg);
+ goto error;
+ }
+ }
+
+ if (snapshot_output) {
+ action_status = lttng_action_snapshot_session_set_output(
+ action, snapshot_output);
+ if (action_status != LTTNG_ACTION_STATUS_OK) {
+ ERR("Failed to set snapshot session action's output.");
+ goto error;
+ }
+
+ /* Ownership of `snapshot_output` has been transferred to the action. */
+ snapshot_output = NULL;
+ }
+
+ if (policy) {
+ enum lttng_action_status status;
+ status = lttng_action_snapshot_session_set_rate_policy(
+ action, policy);
+ if (status != LTTNG_ACTION_STATUS_OK) {
+ ERR("Failed to set rate policy");
+ goto error;
+ }
+ }
+
+ goto end;
+
+error:
+ lttng_action_destroy(action);
+ action = NULL;
+ free(error);
+end:
+ free(snapshot_name_arg);
+ free(path_arg);
+ free(url_arg);
+ free(ctrl_url_arg);
+ free(data_url_arg);
+ free(snapshot_output);
+ free(max_size_arg);
+ lttng_rate_policy_destroy(policy);
+ argpar_state_destroy(state);
+ argpar_item_destroy(item);
+ return action;
+}
+
+struct action_descr {
+ const char *name;
+ struct lttng_action *(*handler) (int *argc, const char ***argv);
+};
+
+static const
+struct action_descr action_descrs[] = {
+ { "notify", handle_action_notify },
+ { "start-session", handle_action_start_session },
+ { "stop-session", handle_action_stop_session },
+ { "rotate-session", handle_action_rotate_session },
+ { "snapshot-session", handle_action_snapshot_session },
+};
+
+static
+struct lttng_action *parse_action(const char *action_name, int *argc, const char ***argv)
+{
+ int i;
+ struct lttng_action *action;
+ const struct action_descr *descr = NULL;
+
+ for (i = 0; i < ARRAY_SIZE(action_descrs); i++) {
+ if (strcmp(action_name, action_descrs[i].name) == 0) {
+ descr = &action_descrs[i];
+ break;
+ }
+ }
+
+ if (!descr) {
+ ERR("Unknown action name: %s", action_name);
+ goto error;
+ }
+
+ action = descr->handler(argc, argv);
+ if (!action) {
+ /* The handler has already printed an error message. */
+ goto error;
+ }
+
+ goto end;
+error:
+ action = NULL;
+end:
+ return action;
+}
+
+static const
+struct argpar_opt_descr add_trigger_options[] = {
+ { OPT_HELP, 'h', "help", false },
+ { OPT_LIST_OPTIONS, '\0', "list-options", false },
+ { OPT_CONDITION, '\0', "condition", true },
+ { OPT_ACTION, '\0', "action", true },
+ { OPT_NAME, '\0', "name", true },
+ { OPT_OWNER_UID, '\0', "owner-uid", true },
+ ARGPAR_OPT_DESCR_SENTINEL,
+};
+
+static
+void lttng_actions_destructor(void *p)
+{
+ struct lttng_action *action = (lttng_action *) p;
+
+ lttng_action_destroy(action);
+}
+
+int cmd_add_trigger(int argc, const char **argv)
+{
+ int ret;
+ int my_argc = argc - 1;
+ const char **my_argv = argv + 1;
+ struct lttng_condition *condition = NULL;
+ struct lttng_dynamic_pointer_array actions;
+ struct argpar_state *argpar_state = NULL;
+ struct argpar_item *argpar_item = NULL;
+ struct lttng_action *action_list = NULL;
+ struct lttng_action *action = NULL;
+ struct lttng_trigger *trigger = NULL;
+ char *error = NULL;
+ char *name = NULL;
+ int i;
+ char *owner_uid = NULL;
+ enum lttng_error_code ret_code;
+ struct mi_writer *mi_writer = NULL;
+
+ lttng_dynamic_pointer_array_init(&actions, lttng_actions_destructor);
+
+ if (lttng_opt_mi) {
+ mi_writer = mi_lttng_writer_create(
+ fileno(stdout), lttng_opt_mi);
+ if (!mi_writer) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ /* Open command element. */
+ ret = mi_lttng_writer_command_open(mi_writer,
+ mi_lttng_element_command_add_trigger);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ /* Open output element. */
+ ret = mi_lttng_writer_open_element(
+ mi_writer, mi_lttng_element_command_output);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ }
+
+ while (true) {
+ enum argpar_state_parse_next_status status;
+ const struct argpar_item_opt *item_opt;
+ int ingested_args;
+
+ argpar_state_destroy(argpar_state);
+ argpar_state = argpar_state_create(my_argc, my_argv,
+ add_trigger_options);
+ if (!argpar_state) {
+ ERR("Failed to create argpar state.");
+ goto error;
+ }
+
+ ARGPAR_ITEM_DESTROY_AND_RESET(argpar_item);
+ status = argpar_state_parse_next(argpar_state, &argpar_item, &error);
+ if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) {
+ ERR("%s", error);
+ goto error;
+ } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) {
+ ERR("%s", error);
+ goto error;
+ } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) {
+ break;
+ }
+
+ LTTNG_ASSERT(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK);
+
+ if (argpar_item->type == ARGPAR_ITEM_TYPE_NON_OPT) {
+ const struct argpar_item_non_opt *item_non_opt =
+ (const struct argpar_item_non_opt *)
+ argpar_item;
+
+ ERR("Unexpected argument `%s`.", item_non_opt->arg);
+ goto error;
+ }
+
+ item_opt = (const struct argpar_item_opt *) argpar_item;
+
+ ingested_args = argpar_state_get_ingested_orig_args(
+ argpar_state);
+
+ my_argc -= ingested_args;
+ my_argv += ingested_args;
+
+ switch (item_opt->descr->id) {
+ case OPT_HELP:
+ SHOW_HELP();
+ ret = 0;
+ goto end;
+ case OPT_LIST_OPTIONS:
+ list_cmd_options_argpar(stdout, add_trigger_options);
+ ret = 0;
+ goto end;
+ case OPT_CONDITION:
+ {
+ if (condition) {
+ ERR("A --condition was already given.");
+ goto error;
+ }
+
+ condition = parse_condition(item_opt->arg, &my_argc, &my_argv);
+ if (!condition) {
+ /*
+ * An error message was already printed by
+ * parse_condition.
+ */
+ goto error;
+ }
+
+ break;
+ }
+ case OPT_ACTION:
+ {
+ action = parse_action(item_opt->arg, &my_argc, &my_argv);
+ if (!action) {
+ /*
+ * An error message was already printed by
+ * parse_condition.
+ */
+ goto error;
+ }
+
+ ret = lttng_dynamic_pointer_array_add_pointer(
+ &actions, action);
+ if (ret) {
+ ERR("Failed to add pointer to pointer array.");
+ goto error;
+ }
+
+ /* Ownership of the action was transferred to the list. */
+ action = NULL;
+
+ break;
+ }
+ case OPT_NAME:
+ {
+ if (!assign_string(&name, item_opt->arg, "--name")) {
+ goto error;
+ }
+
+ break;
+ }
+ case OPT_OWNER_UID:
+ {
+ if (!assign_string(&owner_uid, item_opt->arg,
+ "--owner-uid")) {
+ goto error;
+ }
+
+ break;
+ }
+ default:
+ abort();
+ }
+ }
+
+ if (!condition) {
+ ERR("Missing --condition.");
+ goto error;
+ }
+
+ if (lttng_dynamic_pointer_array_get_count(&actions) == 0) {
+ ERR("Need at least one --action.");
+ goto error;
+ }
+
+ action_list = lttng_action_list_create();
+ if (!action_list) {
+ goto error;
+ }
+
+ for (i = 0; i < lttng_dynamic_pointer_array_get_count(&actions); i++) {
+ enum lttng_action_status status;
+
+ action = (lttng_action *) lttng_dynamic_pointer_array_steal_pointer(&actions, i);
+
+ status = lttng_action_list_add_action(action_list, action);
+ if (status != LTTNG_ACTION_STATUS_OK) {
+ goto error;
+ }
+
+ /*
+ * The `lttng_action_list_add_action()` takes a reference to
+ * the action. We can destroy ours.
+ */
+ lttng_action_destroy(action);
+ action = NULL;
+ }
+
+ trigger = lttng_trigger_create(condition, action_list);
+ if (!trigger) {
+ goto error;
+ }
+
+ if (owner_uid) {
+ enum lttng_trigger_status trigger_status;
+ char *end;
+ long long uid;
+
+ errno = 0;
+ uid = strtol(owner_uid, &end, 10);
+ if (end == owner_uid || *end != '\0' || errno != 0) {
+ ERR("Failed to parse `%s` as a user id.", owner_uid);
+ goto error;
+ }
+
+ trigger_status = lttng_trigger_set_owner_uid(trigger, uid);
+ if (trigger_status != LTTNG_TRIGGER_STATUS_OK) {
+ ERR("Failed to set trigger's user identity.");
+ goto error;
+ }
+ }
+
+ if (name) {
+ ret_code = lttng_register_trigger_with_name(trigger, name);
+ } else {
+ ret_code = lttng_register_trigger_with_automatic_name(trigger);
+ }
+
+ if (ret_code != LTTNG_OK) {
+ ERR("Failed to register trigger: %s.",
+ lttng_strerror(-ret_code));
+ goto error;
+ }
+
+ if (lttng_opt_mi) {
+ ret_code = lttng_trigger_mi_serialize(trigger, mi_writer, NULL);
+ if (ret_code != LTTNG_OK) {
+ goto error;
+ }
+ } else {
+ const char *returned_trigger_name;
+ const enum lttng_trigger_status trigger_status =
+ lttng_trigger_get_name(trigger,
+ &returned_trigger_name);
+
+ if (trigger_status != LTTNG_TRIGGER_STATUS_OK) {
+ WARN("Failed to retrieve the added trigger's name.");
+ } else {
+ MSG("Added trigger `%s`.", returned_trigger_name);
+ }
+ }
+
+ ret = 0;
+
+ goto end;
+
+error:
+ ret = 1;
+
+end:
+ /* Mi closing. */
+ if (lttng_opt_mi && mi_writer) {
+ int mi_ret;
+
+ /* Close output element. */
+ mi_ret = mi_lttng_writer_close_element(mi_writer);
+ if (mi_ret) {
+ ret = 1;
+ goto cleanup;
+ }
+
+ mi_ret = mi_lttng_writer_write_element_bool(mi_writer,
+ mi_lttng_element_command_success, ret ? 0 : 1);
+ if (mi_ret) {
+ ret = 1;
+ goto cleanup;
+ }
+
+ /* Command element close. */
+ mi_ret = mi_lttng_writer_command_close(mi_writer);
+ if (mi_ret) {
+ ret = 1;
+ goto cleanup;
+ }
+ }
+
+cleanup:
+ argpar_state_destroy(argpar_state);
+ argpar_item_destroy(argpar_item);
+ lttng_dynamic_pointer_array_reset(&actions);
+ lttng_condition_destroy(condition);
+ lttng_action_destroy(action_list);
+ lttng_action_destroy(action);
+ lttng_trigger_destroy(trigger);
+ free(error);
+ free(name);
+ free(owner_uid);
+ if (mi_writer && mi_lttng_writer_destroy(mi_writer)) {
+ /* Preserve original error code. */
+ ret = ret ? ret : CMD_ERROR;
+ }
+
+ return ret;
+}
projects / lttng-tools.git / blobdiff