2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; only version 2
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 #include <sys/types.h>
28 #include "../command.h"
30 static char *opt_event_list
;
31 static int opt_kernel
;
32 static char *opt_channel_name
;
33 static char *opt_session_name
;
34 static int opt_userspace
;
35 static char *opt_cmd_name
;
36 static int opt_disable_all
;
44 static struct lttng_handle
*handle
;
46 static struct poptOption long_options
[] = {
47 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
48 {"help", 'h', POPT_ARG_NONE
, 0, OPT_HELP
, 0, 0},
49 {"session", 's', POPT_ARG_STRING
, &opt_session_name
, 0, 0, 0},
50 {"all-events", 'a', POPT_ARG_VAL
, &opt_disable_all
, 1, 0, 0},
51 {"channel", 'c', POPT_ARG_STRING
, &opt_channel_name
, 0, 0, 0},
52 {"kernel", 'k', POPT_ARG_VAL
, &opt_kernel
, 1, 0, 0},
53 {"userspace", 'u', POPT_ARG_STRING
| POPT_ARGFLAG_OPTIONAL
, &opt_cmd_name
, OPT_USERSPACE
, 0, 0},
54 {"pid", 'p', POPT_ARG_INT
, &opt_pid
, 0, 0, 0},
61 static void usage(FILE *ofp
)
63 fprintf(ofp
, "usage: lttng disable-event NAME[,NAME2,...] [options]\n");
65 fprintf(ofp
, " -h, --help Show this help\n");
66 fprintf(ofp
, " -s, --session Apply on session name\n");
67 fprintf(ofp
, " -c, --channel Apply on this channel\n");
68 fprintf(ofp
, " -a, --all-events Disable all tracepoints\n");
69 fprintf(ofp
, " -k, --kernel Apply for the kernel tracer\n");
70 fprintf(ofp
, " -u, --userspace [CMD] Apply for the user-space tracer\n");
71 fprintf(ofp
, " If no CMD, the domain used is UST global\n");
72 fprintf(ofp
, " or else the domain is UST EXEC_NAME\n");
73 fprintf(ofp
, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n");
80 * Disabling event using the lttng API.
82 static int disable_events(char *session_name
)
84 int err
, ret
= CMD_SUCCESS
;
85 char *event_name
, *channel_name
= NULL
;
86 struct lttng_domain dom
;
88 if (opt_channel_name
== NULL
) {
89 err
= asprintf(&channel_name
, DEFAULT_CHANNEL_NAME
);
95 channel_name
= opt_channel_name
;
98 if (opt_kernel
&& opt_userspace
) {
99 ERR("Can't use -k/--kernel and -u/--userspace together");
105 dom
.type
= LTTNG_DOMAIN_KERNEL
;
106 } else if (opt_pid
!= 0) {
107 dom
.type
= LTTNG_DOMAIN_UST_PID
;
108 dom
.attr
.pid
= opt_pid
;
109 DBG("PID %d set to lttng handle", opt_pid
);
110 } else if (opt_userspace
&& opt_cmd_name
== NULL
) {
111 dom
.type
= LTTNG_DOMAIN_UST
;
112 DBG("UST global domain selected");
113 } else if (opt_userspace
&& opt_cmd_name
!= NULL
) {
114 dom
.type
= LTTNG_DOMAIN_UST_EXEC_NAME
;
115 strncpy(dom
.attr
.exec_name
, opt_cmd_name
, NAME_MAX
);
116 dom
.attr
.exec_name
[NAME_MAX
- 1] = '\0';
118 ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
119 ret
= CMD_NOT_IMPLEMENTED
;
123 handle
= lttng_create_handle(session_name
, &dom
);
124 if (handle
== NULL
) {
129 if (opt_disable_all
) {
130 ret
= lttng_disable_event(handle
, NULL
, channel_name
);
135 MSG("All %s events are disabled in channel %s",
136 opt_kernel
? "kernel" : "UST", channel_name
);
140 /* Strip event list */
141 event_name
= strtok(opt_event_list
, ",");
142 while (event_name
!= NULL
) {
143 /* Kernel tracer action */
145 DBG("Disabling kernel event %s in channel %s",
146 event_name
, channel_name
);
147 } else if (opt_userspace
) { /* User-space tracer action */
148 if (opt_cmd_name
!= NULL
|| opt_pid
) {
149 MSG("Only supporting tracing all UST processes (-u) for now.");
150 ret
= CMD_NOT_IMPLEMENTED
;
153 DBG("Disabling UST event %s in channel %s",
154 event_name
, channel_name
);
156 ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
160 ret
= lttng_disable_event(handle
, event_name
, channel_name
);
162 MSG("Unable to disable %s event %s in channel %s",
163 opt_kernel
? "kernel" : "UST", event_name
,
166 MSG("%s event %s disabled in channel %s",
167 opt_kernel
? "kernel" : "UST", event_name
,
172 event_name
= strtok(NULL
, ",");
177 if (opt_channel_name
== NULL
) {
180 lttng_destroy_handle(handle
);
188 * Disable event to trace session
190 int cmd_disable_events(int argc
, const char **argv
)
193 static poptContext pc
;
194 char *session_name
= NULL
;
196 pc
= poptGetContext(NULL
, argc
, argv
, long_options
, 0);
197 poptReadDefaultConfig(pc
, 0);
199 while ((opt
= poptGetNextOpt(pc
)) != -1) {
215 opt_event_list
= (char*) poptGetArg(pc
);
216 if (opt_event_list
== NULL
&& opt_disable_all
== 0) {
217 ERR("Missing event name(s).\n");
223 if (!opt_session_name
) {
224 session_name
= get_session_name();
225 if (session_name
== NULL
) {
230 session_name
= opt_session_name
;
233 ret
= disable_events(session_name
);