builtin-script.c

			perror("failed to create pipe");
			exit(-1);
		}

		pid = fork();
		if (pid < 0) {
			perror("failed to fork");
			exit(-1);
		}

		if (!pid) {
			system_wide = true;
			j = 0;

			dup2(live_pipe[1], 1);
			close(live_pipe[0]);

			if (!is_top_script(argv[0]))
				system_wide = !have_cmd(argc - rep_args,
							&argv[rep_args]);

			__argv = malloc((argc + 6) * sizeof(const char *));
			if (!__argv)
				die("malloc");

			__argv[j++] = "/bin/sh";
			__argv[j++] = rec_script_path;
			if (system_wide)
				__argv[j++] = "-a";
			__argv[j++] = "-q";
			__argv[j++] = "-o";
			__argv[j++] = "-";
			for (i = rep_args + 1; i < argc; i++)
				__argv[j++] = argv[i];
			__argv[j++] = NULL;

			execvp("/bin/sh", (char **)__argv);
			free(__argv);
			exit(-1);
		}

		dup2(live_pipe[0], 0);
		close(live_pipe[1]);

		__argv = malloc((argc + 4) * sizeof(const char *));
		if (!__argv)
			die("malloc");
		j = 0;
		__argv[j++] = "/bin/sh";
		__argv[j++] = rep_script_path;
		for (i = 1; i < rep_args + 1; i++)
			__argv[j++] = argv[i];
		__argv[j++] = "-i";
		__argv[j++] = "-";
		__argv[j++] = NULL;

		execvp("/bin/sh", (char **)__argv);
		free(__argv);
		exit(-1);
	}

	if (rec_script_path)
		script_path = rec_script_path;
	if (rep_script_path)
		script_path = rep_script_path;

	if (script_path) {
		system_wide = false;
		j = 0;

		if (rec_script_path)
			system_wide = !have_cmd(argc - 1, &argv[1]);

		__argv = malloc((argc + 2) * sizeof(const char *));
		if (!__argv)
			die("malloc");
		__argv[j++] = "/bin/sh";
		__argv[j++] = script_path;
		if (system_wide)
			__argv[j++] = "-a";
		for (i = 2; i < argc; i++)
			__argv[j++] = argv[i];
		__argv[j++] = NULL;

		execvp("/bin/sh", (char **)__argv);
		free(__argv);
		exit(-1);
	}

	if (symbol__init() < 0)
		return -1;
	if (!script_name)
		setup_pager();

	session = perf_session__new(input_name, O_RDONLY, 0, false, &event_ops);
	if (session == NULL)
		return -ENOMEM;

	if (!no_callchain)
		symbol_conf.use_callchain = true;
	else
		symbol_conf.use_callchain = false;

	if (generate_script_lang) {
		struct stat perf_stat;
		int input;

		if (output_set_by_user()) {
			fprintf(stderr,
				"custom fields not supported for generated scripts");
			return -1;
		}

		input = open(input_name, O_RDONLY);
		if (input < 0) {
			perror("failed to open file");
			exit(-1);
		}

		err = fstat(input, &perf_stat);
		if (err < 0) {
			perror("failed to stat file");
			exit(-1);
		}

		if (!perf_stat.st_size) {
			fprintf(stderr, "zero-sized file, nothing to do!\n");
			exit(0);
		}

		scripting_ops = script_spec__lookup(generate_script_lang);
		if (!scripting_ops) {
			fprintf(stderr, "invalid language specifier");
			return -1;
		}

		err = scripting_ops->generate_script("perf-script");
		goto out;
	}

	if (script_name) {
		err = scripting_ops->start_script(script_name, argc, argv);
		if (err)
			goto out;
		pr_debug("perf script started with script %s\n\n", script_name);
	}

	err = __cmd_script(session);

	perf_session__delete(session);
	cleanup_scripting();
out:
	return err;
}