+/*
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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
+#include <popt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "cmd.h"
+#include "conf.h"
+#include "utils.h"
+
+static char *opt_channels;
+static char *opt_kernel;
+static int opt_pid_all;
+static int opt_userspace;
+static pid_t opt_pid;
+
+enum {
+ OPT_HELP = 1,
+ OPT_USERSPACE,
+};
+
+static struct poptOption long_options[] = {
+ /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
+ {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
+ {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
+ {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
+ {"all", 0, POPT_ARG_VAL, &opt_pid_all, 1, 0, 0},
+ {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
+ {0, 0, 0, 0, 0, 0, 0}
+};
+
+/*
+ * usage
+ */
+static void usage(FILE *ofp)
+{
+ fprintf(ofp, "usage: lttng enable-channel NAME[,NAME2,...] [options]\n");
+ fprintf(ofp, "\n");
+ fprintf(ofp, " -h, --help Show this help\n");
+ fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
+ fprintf(ofp, " -u, --userspace Apply for the user-space tracer\n");
+ fprintf(ofp, " --all If -u, apply on all traceable apps\n");
+ fprintf(ofp, " -p, --pid PID If -u, apply on a specific PID\n");
+ fprintf(ofp, "\n");
+}
+
+/*
+ * enable_channels
+ *
+ * Enabling channel using the lttng API.
+ */
+static int enable_channels(void)
+{
+ int ret = CMD_SUCCESS;
+ char *channel_name;
+
+ if (set_session_name() < 0) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ /* Strip event list */
+ channel_name = strtok(opt_channels, ",");
+ while (channel_name != NULL) {
+ /* Kernel tracer action */
+ if (opt_kernel) {
+ DBG("Enabling kernel channel %s", channel_name);
+ ret = lttng_kernel_enable_channel(channel_name);
+ if (ret < 0) {
+ goto error;
+ } else {
+ MSG("Kernel channel enabled %s", channel_name);
+ }
+ } else if (opt_userspace) { /* User-space tracer action */
+ /*
+ * TODO: Waiting on lttng UST 2.0
+ */
+ if (opt_pid_all) {
+ } else if (opt_pid != 0) {
+ }
+ ret = CMD_NOT_IMPLEMENTED;
+ goto error;
+ } else {
+ ERR("Please specify a tracer (kernel or user-space)");
+ goto error;
+ }
+
+ /* Next event */
+ channel_name = strtok(NULL, ",");
+ }
+
+error:
+ return ret;
+}
+
+/*
+ * cmd_enable_channels
+ *
+ * Enable channel to trace session
+ */
+int cmd_enable_channels(int argc, const char **argv)
+{
+ int opt, ret;
+ static poptContext pc;
+
+ 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;
+ goto end;
+ case OPT_USERSPACE:
+ opt_userspace = 1;
+ break;
+ default:
+ usage(stderr);
+ ret = CMD_UNDEFINED;
+ goto end;
+ }
+ }
+
+ opt_channels = (char*) poptGetArg(pc);
+ if (opt_channels == NULL) {
+ ERR("Missing channel name(s).\n");
+ usage(stderr);
+ ret = CMD_SUCCESS;
+ goto end;
+ }
+
+ ret = enable_channels();
+
+end:
+ return ret;
+}
projects / lttng-tools.git / commitdiff
