X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=lttng%2Fcommands%2Fdisable_channels.c;fp=lttng%2Fcommands%2Fdisable_channels.c;h=ad2f0bf0829d26d7420b19f99bcc862c3ad895f9;hp=0000000000000000000000000000000000000000;hb=26cc6b4e17dc888cd894ef1f42a83c59d7f8a95f;hpb=d36b858358a8ef4e00de843379d670925f9c23b6

diff --git a/lttng/commands/disable_channels.c b/lttng/commands/disable_channels.c
new file mode 100644
index 000000000..ad2f0bf08
--- /dev/null
+++ b/lttng/commands/disable_channels.c
@@ -0,0 +1,158 @@
+/*
+ * 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 disable-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");
+}
+
+/*
+ *  disable_channels
+ *
+ *  Disabling channel using the lttng API.
+ */
+static int disable_channels(void)
+{
+	int ret = CMD_SUCCESS;
+	char *channel_name;
+
+	if (set_session_name() < 0) {
+		ret = CMD_ERROR;
+		goto error;
+	}
+
+	/* Strip channel list */
+	channel_name = strtok(opt_channels, ",");
+	while (channel_name != NULL) {
+		/* Kernel tracer action */
+		if (opt_kernel) {
+			DBG("Disabling kernel channel %s", channel_name);
+			ret = lttng_kernel_disable_channel(channel_name);
+			if (ret < 0) {
+				goto error;
+			} else {
+				MSG("Kernel channel disabled %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 channel */
+		channel_name = strtok(NULL, ",");
+	}
+
+error:
+	return ret;
+}
+
+/*
+ *  cmd_disable_channels
+ *
+ *  Disable channel to trace session
+ */
+int cmd_disable_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 = disable_channels();
+
+end:
+	return ret;
+}