* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _GNU_SOURCE
#define _LGPL_SOURCE
#include <getopt.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
-#include <config.h>
#include <ctype.h>
#include <lttng/lttng.h>
#include <common/error.h>
#include <common/compat/getenv.h>
+#include <common/utils.h>
#include "command.h"
static char *progname;
int opt_no_sessiond;
char *opt_sessiond_path;
-pid_t sessiond_pid;
-volatile int recv_child_signal;
char *opt_relayd_path;
/* First level command */
static struct cmd_struct commands[] = {
- { "list", cmd_list},
+ { "add-context", cmd_add_context},
+ { "calibrate", cmd_calibrate},
{ "create", cmd_create},
{ "destroy", cmd_destroy},
- { "start", cmd_start},
- { "stop", cmd_stop},
- { "enable-event", cmd_enable_events},
+ { "disable-channel", cmd_disable_channels},
{ "disable-event", cmd_disable_events},
{ "enable-channel", cmd_enable_channels},
- { "disable-channel", cmd_disable_channels},
- { "add-context", cmd_add_context},
+ { "enable-event", cmd_enable_events},
+ { "help", NULL},
+ { "list", cmd_list},
+ { "load", cmd_load},
+ { "metadata", cmd_metadata},
+ { "save", cmd_save},
{ "set-session", cmd_set_session},
- { "version", cmd_version},
- { "calibrate", cmd_calibrate},
- { "view", cmd_view},
{ "snapshot", cmd_snapshot},
- { "save", cmd_save},
- { "load", cmd_load},
+ { "start", cmd_start},
+ { "status", cmd_status},
+ { "stop", cmd_stop},
{ "track", cmd_track},
{ "untrack", cmd_untrack},
+ { "help", NULL},
+ { "version", cmd_version},
+ { "view", cmd_view},
{ NULL, NULL} /* Array closure */
};
-static void usage(FILE *ofp)
-{
- fprintf(ofp, "LTTng Trace Control " VERSION " - " VERSION_NAME "%s\n\n",
- GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION);
- fprintf(ofp, "usage: lttng [OPTIONS] <COMMAND> [<ARGS>]\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Options:\n");
- fprintf(ofp, " -V, --version Show version\n");
- fprintf(ofp, " -h, --help Show this help\n");
- fprintf(ofp, " --list-options Simple listing of lttng options\n");
- fprintf(ofp, " --list-commands Simple listing of lttng commands\n");
- fprintf(ofp, " -v, --verbose Increase verbosity\n");
- fprintf(ofp, " -q, --quiet Quiet mode\n");
- fprintf(ofp, " -m, --mi TYPE Machine Interface mode.\n");
- fprintf(ofp, " Type: xml\n");
- fprintf(ofp, " -g, --group NAME Unix tracing group name. (default: tracing)\n");
- fprintf(ofp, " -n, --no-sessiond Don't spawn a session daemon\n");
- fprintf(ofp, " --sessiond-path PATH Session daemon full path\n");
- fprintf(ofp, " --relayd-path PATH Relayd daemon full path\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Commands:\n");
- fprintf(ofp, " add-context Add context to event and/or channel\n");
- fprintf(ofp, " calibrate Quantify LTTng overhead\n");
- fprintf(ofp, " create Create tracing session\n");
- fprintf(ofp, " destroy Tear down tracing session\n");
- fprintf(ofp, " enable-channel Enable tracing channel\n");
- fprintf(ofp, " enable-event Enable tracing event\n");
- fprintf(ofp, " disable-channel Disable tracing channel\n");
- fprintf(ofp, " disable-event Disable tracing event\n");
- fprintf(ofp, " list List possible tracing options\n");
- fprintf(ofp, " set-session Set current session name\n");
- fprintf(ofp, " snapshot Snapshot buffers of current session name\n");
- fprintf(ofp, " start Start tracing\n");
- fprintf(ofp, " stop Stop tracing\n");
- fprintf(ofp, " version Show version information\n");
- fprintf(ofp, " view Start trace viewer\n");
- fprintf(ofp, " save Save session configuration\n");
- fprintf(ofp, " load Load session configuration\n");
- fprintf(ofp, " track Track specific system resources\n");
- fprintf(ofp, " untrack Untrack specific system resources\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Each command also has its own -h, --help option.\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Please see the lttng(1) man page for full documentation.\n");
- fprintf(ofp, "See http://lttng.org for updates, bug reports and news.\n");
-}
-
static void version(FILE *ofp)
{
fprintf(ofp, "%s (LTTng Trace Control) " VERSION" - " VERSION_NAME "%s\n",
*/
static void sighandler(int sig)
{
- int status;
-
switch (sig) {
case SIGTERM:
DBG("SIGTERM caught");
clean_exit(EXIT_FAILURE);
break;
- case SIGCHLD:
- DBG("SIGCHLD caught");
- waitpid(sessiond_pid, &status, 0);
- recv_child_signal = 1;
- /* Indicate that the session daemon died */
- sessiond_pid = 0;
- ERR("Session daemon died (exit status %d)", WEXITSTATUS(status));
- break;
- case SIGUSR1:
- /* Notify is done */
- recv_child_signal = 1;
- DBG("SIGUSR1 caught");
- break;
default:
DBG("Unknown signal %d caught", sig);
break;
sa.sa_handler = sighandler;
sa.sa_mask = sigset;
sa.sa_flags = 0;
- if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) {
- PERROR("sigaction");
- goto end;
- }
if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) {
PERROR("sigaction");
goto end;
}
- if ((ret = sigaction(SIGCHLD, &sa, NULL)) < 0) {
- PERROR("sigaction");
- goto end;
- }
-
end:
return ret;
}
goto end;
}
+ /* Special case for help command which needs the commands array */
+ if (strcmp(argv[0], "help") == 0) {
+ ret = cmd_help(argc, (const char**) argv, commands);
+ goto end;
+ }
+
cmd = &commands[i];
- while (cmd->func != NULL) {
+ while (cmd->name != NULL) {
/* Find command */
if (strcmp(argv[0], cmd->name) == 0) {
ret = cmd->func(argc, (const char**) argv);
}
if (argc < 2) {
- usage(stderr);
clean_exit(EXIT_FAILURE);
}
ret = 0;
goto end;
case 'h':
- usage(stdout);
- ret = 0;
+ ret = utils_show_man_page(1, "lttng");
+
+ if (ret) {
+ ERR("Cannot view man page lttng(1)");
+ perror("exec");
+ }
goto end;
case 'v':
/* There is only 3 possible level of verbosity. (-vvv) */
ret = 0;
goto end;
default:
- usage(stderr);
ret = 1;
goto error;
}
lttng_opt_verbose = 0;
}
- /* No leftovers, print usage and quit */
+ /* No leftovers, quit */
if ((argc - optind) == 0) {
- usage(stderr);
ret = 1;
goto error;
}
ERR("Command error");
break;
case CMD_UNDEFINED:
- ERR("Undefined command");
+ ERR("Undefined command or invalid arguments");
break;
case CMD_FATAL:
ERR("Fatal error");
ERR("Unsupported command");
break;
case -1:
- usage(stderr);
ret = 1;
break;
case 0:
projects / lttng-tools.git / blobdiff