| 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 | } |