-/*
- * usage
- */
-static void usage(FILE *ofp)
-{
- fprintf(ofp, "usage: lttng view [SESSION_NAME] [OPTIONS]\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "By default, the babeltrace viewer will be used for text viewing\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Where SESSION_NAME is an optional session name. If not specified, lttng will\n");
- fprintf(ofp, "get it from the configuration file (.lttngrc).\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Options:\n");
- fprintf(ofp, " -h, --help Show this help\n");
- fprintf(ofp, " --list-options Simple listing of options\n");
- fprintf(ofp, " -t, --trace-path PATH Trace directory path for the viewer\n");
- fprintf(ofp, " -e, --viewer CMD Specify viewer and/or options to use\n");
- fprintf(ofp, " This will completely override the default viewers so\n");
- fprintf(ofp, " please make sure to specify the full command. The trace\n");
- fprintf(ofp, " directory path of the session will be appended at the end\n");
- fprintf(ofp, " to the arguments\n");
- fprintf(ofp, "\n");
-}
-
-static struct viewers *parse_options(void)
-{
- if (opt_viewer == NULL) {
- /* Default is babeltrace */
- return &(viewers[VIEWER_BABELTRACE]);
- }
-
-#if 0
- if (strstr(opt_viewer, viewers[VIEWER_LTTV_GUI].exec_name) == 0) {
- return &(viewers[VIEWER_LTTV_GUI]);
- }
-#endif
-
- /*
- * This means that if -e, --viewers is used, we just override everything
- * with it. For supported viewers like lttv, we could simply detect if "-t"
- * is passed and if not, add the trace directory to it.
- */
- return &(viewers[VIEWER_USER_DEFINED]);
-}
-
-/*
- * Alloc an array of string pointer from a simple string having all options
- * seperated by spaces. Also adds the trace path to the arguments.
- *
- * The returning pointer is ready to be passed to execvp().
- */
-static char **alloc_argv_from_user_opts(char *opts, const char *trace_path)
-{
- int i = 0, ignore_space = 0;
- unsigned int num_opts = 1;
- char **argv, *token = opts;
-
- /* Count number of arguments. */
- do {
- if (*token == ' ') {
- /* Use to ignore consecutive spaces */
- if (!ignore_space) {
- num_opts++;
- }
- ignore_space = 1;
- } else {
- ignore_space = 0;
- }
- token++;
- } while (*token != '\0');
-
- /* Add two here for the NULL terminating element and trace path */
- argv = zmalloc(sizeof(char *) * (num_opts + 2));
- if (argv == NULL) {
- goto error;
- }
-
- token = strtok(opts, " ");
- while (token != NULL) {
- argv[i] = strdup(token);
- token = strtok(NULL, " ");
- i++;
- }
-
- argv[num_opts] = (char *) trace_path;
- argv[num_opts + 1] = NULL;
-
- return argv;
-
-error:
- return NULL;
-}
-
-/*
- * Alloc an array of string pointer from an array of strings. It also adds
- * the trace path to the argv.
- *
- * The returning pointer is ready to be passed to execvp().
- */
-static char **alloc_argv_from_local_opts(const char **opts, size_t opts_len,
- const char *trace_path)
-{
- char **argv;
- size_t size, mem_len;
-
-
- /* Add one for the NULL terminating element. */
- mem_len = opts_len + 1;
- if (session_live_mode) {
- /* Add 3 option for the live mode being "-i lttng-live URL". */
- mem_len += 3;
- } else {
- /* Add option for the trace path. */
- mem_len += 1;
- }
-
- size = sizeof(char *) * mem_len;
-
- /* Add two here for the trace_path and the NULL terminating element. */
- argv = zmalloc(size);
- if (argv == NULL) {
- goto error;
- }
-
- memcpy(argv, opts, size);
-
- if (session_live_mode) {
- argv[opts_len] = "-i";
- argv[opts_len + 1] = "lttng-live";
- argv[opts_len + 2] = (char *) trace_path;
- argv[opts_len + 3] = NULL;
- } else {
- argv[opts_len] = (char *) trace_path;
- argv[opts_len + 1] = NULL;
- }
-
-error:
- return argv;
-}
-
-/*
- * Spawn viewer with the trace directory path.
- */
-static int spawn_viewer(const char *trace_path)
-{
- int ret = 0;
- struct stat status;
- const char *viewer_bin = NULL;
- struct viewers *viewer;
- char **argv = NULL;
-
- /* Check for --viewer options */
- viewer = parse_options();
- if (viewer == NULL) {
- ret = CMD_ERROR;
- goto error;
- }
-
- switch (viewer->type) {
- case VIEWER_BABELTRACE:
- if (stat(babeltrace_bin, &status) == 0) {
- viewer_bin = babeltrace_bin;
- } else {
- viewer_bin = viewer->exec_name;
- }
- argv = alloc_argv_from_local_opts(babeltrace_opts,
- ARRAY_SIZE(babeltrace_opts), trace_path);
- break;
-#if 0
- case VIEWER_LTTV_GUI:
- if (stat(lttv_gui_bin, &status) == 0) {
- viewer_bin = lttv_gui_bin;
- } else {
- viewer_bin = viewer->exec_name;
- }
- argv = alloc_argv_from_local_opts(lttv_gui_opts,
- ARRAY_SIZE(lttv_gui_opts), trace_path);
- break;
-#endif
- case VIEWER_USER_DEFINED:
- argv = alloc_argv_from_user_opts(opt_viewer, trace_path);
- if (argv) {
- viewer_bin = argv[0];
- }
- break;
- default:
- viewer_bin = viewers[VIEWER_BABELTRACE].exec_name;
- argv = alloc_argv_from_local_opts(babeltrace_opts,
- ARRAY_SIZE(babeltrace_opts), trace_path);
- break;
- }
-
- if (argv == NULL) {
- ret = CMD_FATAL;
- goto error;
- }
-
- DBG("Using %s viewer", viewer_bin);
-
- ret = execvp(viewer_bin, argv);
- if (ret) {
- if (errno == ENOENT) {
- ERR("%s not found on the system", viewer_bin);
- } else {
- PERROR("exec: %s", viewer_bin);
- }
- free(argv);
- ret = CMD_FATAL;
- goto error;
- }
-
-error:
- return ret;
-}
-