bin: compile lttng as C++

[lttng-tools.git] / src / bin / lttng / commands / version.cpp

diff --git a/src/bin/lttng/commands/version.cpp b/src/bin/lttng/commands/version.cpp
new file mode 100644 (file)
index 0000000..ccc7f66
--- /dev/null
+++ b/src/bin/lttng/commands/version.cpp
@@ -0,0 +1,168 @@
+/*
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ *
+ * 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/mi-lttng.h>
+
+#include "../command.h"
+#include "version.h"
+
+#ifdef LTTNG_EMBED_HELP
+static const char help_msg[] =
+#include <lttng-version.1.h>
+;
+#endif
+
+enum {
+       OPT_HELP = 1,
+       OPT_LIST_OPTIONS,
+};
+
+static const char *lttng_license = "lttng is free software and under the GPL license and part LGPL";
+
+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},
+       {0, 0, 0, 0, 0, 0, 0}
+};
+
+/*
+ *  create_version
+ */
+static void create_version(struct mi_lttng_version_data *version)
+{
+       strncpy(version->version, VERSION, NAME_MAX);
+       version->version_major = VERSION_MAJOR;
+       version->version_minor = VERSION_MINOR;
+       version->version_patchlevel = VERSION_PATCHLEVEL;
+       strncpy(version->version_commit, GIT_VERSION, NAME_MAX);
+       strncpy(version->version_name, VERSION_NAME, NAME_MAX);
+       strncpy(version->package_url, PACKAGE_URL, NAME_MAX);
+}
+
+/*
+ * Print the machine interface output of this command.
+ */
+static int print_mi(void)
+{
+       int ret = CMD_SUCCESS;
+       struct mi_writer *writer = NULL;
+       struct mi_lttng_version_data version;
+
+       create_version(&version);
+
+       writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
+       if (!writer) {
+               ret = -LTTNG_ERR_NOMEM;
+               goto end;
+       }
+
+       /* Open the command element */
+       ret = mi_lttng_writer_command_open(writer,
+                       mi_lttng_element_command_version);
+       if (ret) {
+               ret = CMD_ERROR;
+               goto error;
+       }
+
+       /* Beginning of output */
+       ret = mi_lttng_writer_open_element(writer,
+                       mi_lttng_element_command_output);
+       if (ret) {
+               ret = CMD_ERROR;
+               goto error;
+       }
+
+       /* Print the machine interface of version */
+       ret = mi_lttng_version(writer, &version,
+                       VERSION_DESCRIPTION, lttng_license);
+       if (ret) {
+               ret = CMD_ERROR;
+               goto error;
+       }
+
+       /* Close the output element */
+       ret = mi_lttng_writer_close_element(writer);
+       if (ret) {
+               ret = CMD_ERROR;
+               goto error;
+       }
+
+       /* Close the command  */
+       ret = mi_lttng_writer_command_close(writer);
+       if (ret) {
+               ret = CMD_ERROR;
+       }
+
+error:
+       /* Cleanup */
+       if (writer && mi_lttng_writer_destroy(writer)) {
+               /* Preserve original error code */
+               ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
+       }
+
+end:
+       return ret;
+}
+
+/*
+ *  cmd_version
+ */
+int cmd_version(int argc, const char **argv)
+{
+       int opt, ret = CMD_SUCCESS;
+       static poptContext pc;
+
+       pc = poptGetContext(NULL, argc, argv, long_options, 0);
+       poptReadDefaultConfig(pc, 0);
+
+       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;
+               }
+       }
+
+       if (lttng_opt_mi) {
+               ret = print_mi();
+       } else {
+               MSG("lttng version " VERSION " - " VERSION_NAME "%s",
+                       GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION);
+               MSG("\n" VERSION_DESCRIPTION "\n");
+               MSG("Web site: https://lttng.org");
+               MSG("\n%s", lttng_license);
+               if (EXTRA_VERSION_NAME[0] != '\0') {
+                       MSG("\nExtra version name: " EXTRA_VERSION_NAME);
+               }
+               if (EXTRA_VERSION_DESCRIPTION[0] != '\0') {
+                       MSG("\nExtra version description:\n\t" EXTRA_VERSION_DESCRIPTION);
+               }
+               if (EXTRA_VERSION_PATCHES[0] != '\0') {
+                       MSG("\nExtra version patches:\n\t" EXTRA_VERSION_PATCHES);
+               }
+       }
+
+end:
+       poptFreeContext(pc);
+       return ret;
+}