+++ /dev/null
-/*
- * Copyright (C) 2011 David Goulet <dgoulet@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#define _LGPL_SOURCE
-#include <popt.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <common/spawn-viewer.h>
-#include "../command.h"
-
-static char *opt_session_name;
-static char *opt_viewer;
-static char *opt_trace_path;
-
-#ifdef LTTNG_EMBED_HELP
-static const char help_msg[] =
-#include <lttng-view.1.h>
-;
-#endif
-
-enum {
- OPT_HELP = 1,
- OPT_LIST_OPTIONS,
-};
-
-static struct poptOption long_options[] = {
- /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
- {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
- {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
- {"viewer", 'e', POPT_ARG_STRING, &opt_viewer, 0, 0, 0},
- {"trace-path", 't', POPT_ARG_STRING, &opt_trace_path, 0, 0, 0},
- {0, 0, 0, 0, 0, 0, 0}
-};
-
-/* Is the session we are trying to view is in live mode. */
-static int session_live_mode;
-
-/*
- * Build the live path we need for the lttng live view.
- */
-static char *build_live_path(char *session_name)
-{
- int ret;
- char *path = NULL;
- char hostname[LTTNG_HOST_NAME_MAX];
-
- ret = gethostname(hostname, sizeof(hostname));
- if (ret < 0) {
- PERROR("gethostname");
- goto error;
- }
-
- ret = asprintf(&path, "net://localhost/host/%s/%s", hostname,
- session_name);
- if (ret < 0) {
- PERROR("asprintf live path");
- goto error;
- }
-
-error:
- return path;
-}
-
-/*
- * Exec viewer if found and use session name path.
- */
-static int view_trace(void)
-{
- int ret;
- char *session_name, *trace_path = NULL;
- struct lttng_session *sessions = NULL;
- bool free_trace_path = false;
-
- /*
- * Safety net. If lttng is suid at some point for *any* useless reasons,
- * this prevent any bad execution of binaries.
- */
- if (getuid() != 0) {
- if (getuid() != geteuid()) {
- ERR("UID does not match effective UID.");
- ret = CMD_ERROR;
- goto error;
- } else if (getgid() != getegid()) {
- ERR("GID does not match effective GID.");
- ret = CMD_ERROR;
- goto error;
- }
- }
-
- /* User define trace path override the session name */
- if (opt_trace_path) {
- session_name = NULL;
- } else if(opt_session_name == NULL) {
- session_name = get_session_name();
- if (session_name == NULL) {
- ret = CMD_ERROR;
- goto error;
- }
- } else {
- session_name = opt_session_name;
- }
-
- DBG("Viewing trace for session %s", session_name);
-
- if (session_name) {
- int i, count, found = 0;
-
- /* Getting all sessions */
- count = lttng_list_sessions(&sessions);
- if (count < 0) {
- ERR("Unable to list sessions. Session name %s not found.",
- session_name);
- MSG("Is there a session daemon running?");
- ret = CMD_ERROR;
- goto free_error;
- }
-
- /* Find our session listed by the session daemon */
- for (i = 0; i < count; i++) {
- if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
- found = 1;
- break;
- }
- }
-
- if (!found) {
- MSG("Session name %s not found", session_name);
- ret = CMD_ERROR;
- goto free_sessions;
- }
-
- session_live_mode = sessions[i].live_timer_interval;
-
- DBG("Session live mode set to %d", session_live_mode);
-
- if (sessions[i].enabled && !session_live_mode) {
- WARN("Session %s is running. Please stop it before reading it.",
- session_name);
- ret = CMD_ERROR;
- goto free_sessions;
- }
-
- /* If the timer interval is set we are in live mode. */
- if (session_live_mode) {
- trace_path = build_live_path(session_name);
- if (!trace_path) {
- ret = CMD_ERROR;
- goto free_sessions;
- }
- free_trace_path = true;
- } else {
- /* Get file system session path. */
- trace_path = sessions[i].path;
- }
- } else {
- trace_path = opt_trace_path;
- }
-
- MSG("Trace directory: %s\n", trace_path);
-
- ret = spawn_viewer(trace_path, opt_viewer, session_live_mode);
- if (ret < 0) {
- /* Don't set ret so lttng can interpret the sessiond error. */
- goto free_sessions;
- }
-
-free_sessions:
- if (session_live_mode && free_trace_path) {
- free(trace_path);
- }
- free(sessions);
-free_error:
- if (opt_session_name == NULL) {
- free(session_name);
- }
-error:
- return ret;
-}
-
-/*
- * The 'view <options>' first level command
- */
-int cmd_view(int argc, const char **argv)
-{
- int opt, ret = CMD_SUCCESS;
- static poptContext pc;
- const char *leftover = NULL;
-
- pc = poptGetContext(NULL, argc, argv, long_options, 0);
- poptReadDefaultConfig(pc, 0);
-
- if (lttng_opt_mi) {
- WARN("mi does not apply to view command");
- }
-
- while ((opt = poptGetNextOpt(pc)) != -1) {
- switch (opt) {
- case OPT_HELP:
- SHOW_HELP();
- goto end;
- case OPT_LIST_OPTIONS:
- list_cmd_options(stdout, long_options);
- goto end;
- default:
- ret = CMD_UNDEFINED;
- goto end;
- }
- }
-
- opt_session_name = (char*) poptGetArg(pc);
-
- leftover = poptGetArg(pc);
- if (leftover) {
- ERR("Unknown argument: %s", leftover);
- ret = CMD_ERROR;
- goto end;
- }
-
- ret = view_trace();
-
-end:
- poptFreeContext(pc);
- return ret;
-}
projects / lttng-tools.git / blobdiff