Update version to 2.0-pre17

[lttng-tools.git] / lttng / lttng.c

diff --git a/lttng/lttng.c b/lttng/lttng.c
index 77006bc7f63ab11834bb3b6286e8d69f7af58f55..69b563d4a643eb80db6718673602ebe67efb9c4b 100644 (file)
--- a/lttng/lttng.c
+++ b/lttng/lttng.c
@@ -3,8 +3,8 @@
  *
  * 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.
+ * as published by the Free Software Foundation; only version 2
+ * of the License.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -23,6 +23,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <config.h>
 
 #include <lttng/lttng.h>
 
@@ -39,7 +40,6 @@ static int opt_no_sessiond;
 static char *opt_sessiond_path;
 
 enum {
-       OPT_NO_SESSIOND,
        OPT_SESSION_PATH,
        OPT_DUMP_OPTIONS,
        OPT_DUMP_COMMANDS,
@@ -51,7 +51,7 @@ static struct option long_options[] = {
        {"group",            1, NULL, 'g'},
        {"verbose",          0, NULL, 'v'},
        {"quiet",            0, NULL, 'q'},
-       {"no-sessiond",      0, NULL, OPT_NO_SESSIOND},
+       {"no-sessiond",      0, NULL, 'n'},
        {"sessiond-path",    1, NULL, OPT_SESSION_PATH},
        {"list-options",     0, NULL, OPT_DUMP_OPTIONS},
        {"list-commands",    0, NULL, OPT_DUMP_COMMANDS},
@@ -63,7 +63,6 @@ static struct cmd_struct commands[] =  {
        { "list", cmd_list},
        { "create", cmd_create},
        { "destroy", cmd_destroy},
-       { "add-channel", cmd_add_channel},
        { "start", cmd_start},
        { "stop", cmd_stop},
        { "enable-event", cmd_enable_events},
@@ -73,6 +72,7 @@ static struct cmd_struct commands[] =  {
        { "add-context", cmd_add_context},
        { "set-session", cmd_set_session},
        { "version", cmd_version},
+       { "calibrate", cmd_calibrate},
        { NULL, NULL}   /* Array closure */
 };
 
@@ -86,14 +86,14 @@ static void usage(FILE *ofp)
        fprintf(ofp, "  -g, --group NAME       Unix tracing group name. (default: tracing)\n");
        fprintf(ofp, "  -v, --verbose          Verbose mode\n");
        fprintf(ofp, "  -q, --quiet            Quiet mode\n");
-       fprintf(ofp, "      --no-sessiond      Don't spawn a session daemon\n");
+       fprintf(ofp, "  -n, --no-sessiond      Don't spawn a session daemon\n");
        fprintf(ofp, "      --sessiond-path    Session daemon full path\n");
        fprintf(ofp, "      --list-options     Simple listing of lttng options\n");
        fprintf(ofp, "      --list-commands    Simple listing of lttng commands\n");
        fprintf(ofp, "\n");
        fprintf(ofp, "Commands:\n");
-       fprintf(ofp, "    add-channel     Add channel to tracer\n");
        fprintf(ofp, "    add-context     Add context to event or/and channel\n");
+       fprintf(ofp, "    calibrate       Quantify LTTng overhead\n");
        fprintf(ofp, "    create          Create tracing session\n");
        fprintf(ofp, "    destroy         Teardown tracing session\n");
        fprintf(ofp, "    enable-channel  Enable tracing channel\n");
@@ -287,7 +287,7 @@ static int spawn_sessiond(char *pathname)
                 * Spawn session daemon and tell
                 * it to signal us when ready.
                 */
-               execlp(pathname, "ltt-sessiond", "--sig-parent", "--quiet", NULL);
+               execlp(pathname, "lttng-sessiond", "--sig-parent", "--quiet", NULL);
                /* execlp only returns if error happened */
                if (errno == ENOENT) {
                        ERR("No session daemon found. Use --sessiond-path.");
@@ -297,7 +297,7 @@ static int spawn_sessiond(char *pathname)
                kill(getppid(), SIGTERM);       /* unpause parent */
                exit(EXIT_FAILURE);
        } else if (pid > 0) {
-               /* Wait for ltt-sessiond to start */
+               /* Wait for lttng-sessiond to start */
                pause();
                goto end;
        } else {
@@ -339,8 +339,9 @@ static int check_sessiond(void)
 
                /* Let's rock and roll */
                if (pathname == NULL) {
-                       ret = asprintf(&alloc_pathname, "ltt-sessiond");
+                       ret = asprintf(&alloc_pathname, INSTALL_BIN_PATH "/lttng-sessiond");
                        if (ret < 0) {
+                               perror("asprintf spawn sessiond");
                                goto end;
                        }
                        pathname = alloc_pathname;
@@ -358,6 +359,23 @@ end:
        return ret;
 }
 
+/*
+ * Check for the "help" option in the argv. If found, return 1 else return 0.
+ */
+static int check_help_command(int argc, char **argv)
+{
+       int i;
+
+       for (i = 0; i < argc; i++) {
+               if ((strncmp(argv[i], "-h", 2) == 0) ||
+                               strncmp(argv[i], "--h", 3) == 0) {
+                       return 1;
+               }
+       }
+
+       return 0;
+}
+
 /*
  *  parse_args
  *
@@ -373,13 +391,13 @@ static int parse_args(int argc, char **argv)
                clean_exit(EXIT_FAILURE);
        }
 
-       while ((opt = getopt_long(argc, argv, "+hvqg:", long_options, NULL)) != -1) {
+       while ((opt = getopt_long(argc, argv, "+hnvqg:", long_options, NULL)) != -1) {
                switch (opt) {
                case 'h':
                        usage(stderr);
                        goto error;
                case 'v':
-                       opt_verbose = 1;
+                       opt_verbose += 1;
                        break;
                case 'q':
                        opt_quiet = 1;
@@ -387,7 +405,7 @@ static int parse_args(int argc, char **argv)
                case 'g':
                        lttng_set_tracing_group(optarg);
                        break;
-               case OPT_NO_SESSIOND:
+               case 'n':
                        opt_no_sessiond = 1;
                        break;
                case OPT_SESSION_PATH:
@@ -413,7 +431,8 @@ static int parse_args(int argc, char **argv)
        }
 
        /* Spawn session daemon if needed */
-       if (opt_no_sessiond == 0 && (check_sessiond() < 0)) {
+       if (opt_no_sessiond == 0 && check_help_command(argc, argv) == 0 &&
+                       (check_sessiond() < 0)) {
                goto error;
        }
 
@@ -432,7 +451,7 @@ static int parse_args(int argc, char **argv)
                if (ret == -1) {
                        usage(stderr);
                } else {
-                       ERR("%s", lttng_get_readable_code(ret));
+                       ERR("%s", lttng_strerror(ret));
                }
                goto error;
        }