/** Also ensure that TZ is set, so that we don't waste time identifying the* system timezone each of the many times we start a standalone backend.* It's okay to use a hard-wired value here because nothing done during* initdb cares about the timezone setting.*/putenv("TZ=GMT");if ((ret = find_other_exec(argv[0], "postgres", PG_BACKEND_VERSIONSTR,backend_exec)) < 0){char        full_path[MAXPGPATH];if (find_my_exec(argv[0], full_path) < 0)strlcpy(full_path, progname, sizeof(full_path));if (ret == -1)fprintf(stderr,_("The program \"postgres\" is needed by %s ""but was not found in the\n""same directory as \"%s\".\n""Check your installation.\n"),progname, full_path);elsefprintf(stderr,_("The program \"postgres\" was found by \"%s\"\n""but was not the same version as %s.\n""Check your installation.\n"),full_path, progname);exit(1);}    

    /* store binary directory */strcpy(bin_path, backend_exec);*last_dir_separator(bin_path) = '\0';canonicalize_path(bin_path);fprintf(stderr,"bin_path is: %s \n",bin_path);if (!share_path){share_path = pg_malloc(MAXPGPATH);get_share_path(backend_exec, share_path);}else if (!is_absolute_path(share_path)){fprintf(stderr, _("%s: input file location must be an absolute path\n"), progname);exit(1);}canonicalize_path(share_path);fprintf(stderr,"share_path is: %s \n",share_path);