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f3ed775e DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
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; either version 2 | |
7 | * of the License, or (at your option) any later version. | |
8 | * | |
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. | |
13 | * | |
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. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <popt.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | ||
25 | #include "cmd.h" | |
26 | ||
27 | static int opt_pid; | |
28 | static int opt_channels; | |
29 | ||
30 | enum { | |
31 | OPT_HELP = 1, | |
32 | OPT_EVENTS, | |
33 | OPT_KERNEL, | |
34 | OPT_APPS, | |
35 | OPT_SESSIONS, | |
36 | OPT_CHANNEL, | |
37 | }; | |
38 | ||
39 | static struct poptOption long_options[] = { | |
40 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
41 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
42 | {"events", 'e', POPT_ARG_NONE, 0, OPT_EVENTS, 0, 0}, | |
43 | {"kernel", 'k', POPT_ARG_NONE, 0, OPT_KERNEL, 0, 0}, | |
44 | {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, | |
45 | {"apps", 'a', POPT_ARG_NONE, 0, OPT_APPS, 0, 0}, | |
46 | {"session", 's', POPT_ARG_NONE, 0, OPT_SESSIONS, 0, 0}, | |
47 | {"channel", 'c', POPT_ARG_VAL, &opt_channels, 1, 0, 0}, | |
48 | {0, 0, 0, 0, 0, 0, 0} | |
49 | }; | |
50 | ||
51 | /* | |
52 | * usage | |
53 | */ | |
54 | static void usage(FILE *ofp) | |
55 | { | |
56 | fprintf(ofp, "usage: lttng list [options] [<executable>]\n"); | |
57 | fprintf(ofp, "\n"); | |
58 | fprintf(ofp, " -h, --help Show this help\n"); | |
59 | fprintf(ofp, " -e, --events List all available instrumentation\n"); | |
60 | fprintf(ofp, " -k, --kernel List kernel instrumentation\n"); | |
61 | fprintf(ofp, " -p, --pid PID List user-space instrumentation by PID\n"); | |
62 | fprintf(ofp, " -a, --apps List traceable user-space applications/pids\n"); | |
63 | fprintf(ofp, " -s, --sessions List tracing session\n"); | |
64 | fprintf(ofp, "\n"); | |
65 | } | |
66 | ||
67 | /* | |
68 | * get_cmdline_by_pid | |
69 | * | |
70 | * Get command line from /proc for a specific pid. | |
71 | * | |
72 | * On success, return an allocated string pointer pointing to the proc | |
73 | * cmdline. | |
74 | * On error, return NULL. | |
75 | */ | |
76 | static char *get_cmdline_by_pid(pid_t pid) | |
77 | { | |
78 | int ret; | |
79 | FILE *fp; | |
80 | char *cmdline = NULL; | |
81 | char path[24]; /* Can't go bigger than /proc/65535/cmdline */ | |
82 | ||
83 | snprintf(path, sizeof(path), "/proc/%d/cmdline", pid); | |
84 | fp = fopen(path, "r"); | |
85 | if (fp == NULL) { | |
86 | goto end; | |
87 | } | |
88 | ||
89 | /* Caller must free() *cmdline */ | |
90 | cmdline = malloc(PATH_MAX); | |
91 | ret = fread(cmdline, 1, PATH_MAX, fp); | |
92 | fclose(fp); | |
93 | ||
94 | end: | |
95 | return cmdline; | |
96 | } | |
97 | ||
98 | /* | |
99 | * list_kernel | |
100 | * | |
101 | * Ask for all trace events in the kernel and pretty print them. | |
102 | */ | |
103 | static int list_kernel(void) | |
104 | { | |
105 | int ret, pos, size; | |
106 | char *event_list, *event, *ptr; | |
107 | ||
108 | DBG("Getting all tracing events"); | |
109 | ||
110 | ret = lttng_kernel_list_events(&event_list); | |
111 | if (ret < 0) { | |
112 | ERR("Unable to list kernel instrumentation"); | |
113 | return ret; | |
114 | } | |
115 | ||
116 | MSG("Kernel tracepoints:\n-------------"); | |
117 | ||
118 | ptr = event_list; | |
119 | while ((size = sscanf(ptr, "event { name = %m[^;]; };%n\n", &event, &pos)) == 1) { | |
120 | MSG(" - %s", event); | |
121 | /* Move pointer to the next line */ | |
122 | ptr += pos + 1; | |
123 | free(event); | |
124 | } | |
125 | ||
126 | free(event_list); | |
127 | ||
128 | return CMD_SUCCESS; | |
129 | } | |
130 | ||
131 | /* | |
132 | * list_sessions | |
133 | * | |
134 | * Get the list of available sessions from the session daemon and print it to | |
135 | * user. | |
136 | */ | |
137 | static int list_sessions(void) | |
138 | { | |
139 | int ret, count, i; | |
140 | struct lttng_session *sessions; | |
141 | ||
142 | count = lttng_list_sessions(&sessions); | |
143 | DBG("Session count %d", count); | |
144 | if (count < 0) { | |
145 | ret = count; | |
146 | goto error; | |
147 | } | |
148 | ||
149 | MSG("Available sessions:"); | |
150 | for (i = 0; i < count; i++) { | |
151 | MSG(" %d) %s (%s)", i+1, sessions[i].name, sessions[i].path); | |
152 | } | |
153 | ||
154 | free(sessions); | |
155 | ||
156 | return CMD_SUCCESS; | |
157 | ||
158 | error: | |
159 | return ret; | |
160 | } | |
161 | ||
162 | /* | |
163 | * list_apps | |
164 | * | |
165 | * Get the UST traceable pid list and print them to the user. | |
166 | */ | |
167 | static int list_apps(void) | |
168 | { | |
169 | int i, ret, count; | |
170 | pid_t *pids; | |
171 | char *cmdline; | |
172 | ||
173 | count = 0; | |
174 | //count = lttng_ust_list_traceable_apps(&pids); | |
175 | if (count < 0) { | |
176 | ret = count; | |
177 | goto error; | |
178 | } | |
179 | ||
180 | MSG("LTTng UST traceable application [name (pid)]:"); | |
181 | for (i=0; i < count; i++) { | |
182 | cmdline = get_cmdline_by_pid(pids[i]); | |
183 | if (cmdline == NULL) { | |
184 | MSG("\t(not running) (%d)", pids[i]); | |
185 | continue; | |
186 | } | |
187 | MSG("\t%s (%d)", cmdline, pids[i]); | |
188 | free(cmdline); | |
189 | } | |
190 | ||
191 | /* Allocated by lttng_ust_list_apps() */ | |
192 | free(pids); | |
193 | ||
194 | return CMD_SUCCESS; | |
195 | ||
196 | error: | |
197 | return ret; | |
198 | } | |
199 | ||
200 | /* | |
201 | * list_pid | |
202 | * | |
203 | * List all instrumentation for a specific pid | |
204 | */ | |
205 | /* | |
206 | static int list_pid(int pid) | |
207 | { | |
208 | int ret; | |
209 | ||
210 | return CMD_SUCCESS; | |
211 | ||
212 | error: | |
213 | return ret; | |
214 | } | |
215 | */ | |
216 | ||
217 | /* | |
218 | * list_executable | |
219 | * | |
220 | * List all instrumentation for an executable on the system | |
221 | */ | |
222 | /* | |
223 | static int list_executable(char *name) | |
224 | { | |
225 | } | |
226 | */ | |
227 | ||
228 | /* | |
229 | * cmd_list | |
230 | * | |
231 | * The 'list <options>' first level command | |
232 | */ | |
233 | int cmd_list(int argc, const char **argv) | |
234 | { | |
235 | int opt, ret = CMD_SUCCESS; | |
236 | const char *command_name; | |
237 | static poptContext pc; | |
238 | ||
239 | if (argc < 2) { | |
240 | usage(stderr); | |
241 | goto end; | |
242 | } | |
243 | ||
244 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
245 | poptReadDefaultConfig(pc, 0); | |
246 | ||
247 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
248 | switch (opt) { | |
249 | case OPT_HELP: | |
250 | usage(stderr); | |
251 | goto end; | |
252 | case OPT_EVENTS: | |
253 | ret = CMD_NOT_IMPLEMENTED; | |
254 | goto end; | |
255 | case OPT_APPS: | |
256 | ret = list_apps(); | |
257 | break; | |
258 | case OPT_KERNEL: | |
259 | ret = list_kernel(); | |
260 | break; | |
261 | case OPT_SESSIONS: | |
262 | ret = list_sessions(); | |
263 | break; | |
264 | default: | |
265 | usage(stderr); | |
266 | ret = CMD_UNDEFINED; | |
267 | goto end; | |
268 | } | |
269 | } | |
270 | ||
271 | if (opt_pid != 0) { | |
272 | //ret = list_pid(pid); | |
273 | ret = CMD_NOT_IMPLEMENTED; | |
274 | } | |
275 | ||
276 | command_name = poptGetArg(pc); | |
277 | if (command_name != NULL) { | |
278 | // ret = list_executable(command_name); | |
279 | ret = CMD_NOT_IMPLEMENTED; | |
280 | } | |
281 | ||
282 | end: | |
283 | return ret; | |
284 | } |