| /* |
| * Copyright 2001-2021 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include "internal/e_os.h" |
| #include <openssl/e_os2.h> |
| #include <openssl/err.h> |
| #include <openssl/ui.h> |
| |
| #ifndef OPENSSL_NO_UI_CONSOLE |
| /* |
| * need for #define _POSIX_C_SOURCE arises whenever you pass -ansi to gcc |
| * [maybe others?], because it masks interfaces not discussed in standard, |
| * sigaction and fileno included. -pedantic would be more appropriate for the |
| * intended purposes, but we can't prevent users from adding -ansi. |
| */ |
| # if defined(OPENSSL_SYS_VXWORKS) |
| # include <sys/types.h> |
| # endif |
| |
| # if !defined(_POSIX_C_SOURCE) && defined(OPENSSL_SYS_VMS) |
| # ifndef _POSIX_C_SOURCE |
| # define _POSIX_C_SOURCE 2 |
| # endif |
| # endif |
| # include <signal.h> |
| # include <stdio.h> |
| # include <string.h> |
| # include <errno.h> |
| |
| # if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) |
| # include <unistd.h> |
| /* |
| * If unistd.h defines _POSIX_VERSION, we conclude that we are on a POSIX |
| * system and have sigaction and termios. |
| */ |
| # if defined(_POSIX_VERSION) && _POSIX_VERSION>=199309L |
| |
| # define SIGACTION |
| # if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY) |
| # define TERMIOS |
| # endif |
| |
| # endif |
| # endif |
| |
| # include "ui_local.h" |
| # include "internal/cryptlib.h" |
| |
| # ifdef OPENSSL_SYS_VMS /* prototypes for sys$whatever */ |
| # include <starlet.h> |
| # ifdef __DECC |
| # pragma message disable DOLLARID |
| # endif |
| # endif |
| |
| # ifdef WIN_CONSOLE_BUG |
| # include <windows.h> |
| # ifndef OPENSSL_SYS_WINCE |
| # include <wincon.h> |
| # endif |
| # endif |
| |
| /* |
| * There are 6 types of terminal interface supported, TERMIO, TERMIOS, VMS, |
| * MSDOS, WIN32 Console and SGTTY. |
| * |
| * If someone defines one of the macros TERMIO, TERMIOS or SGTTY, it will |
| * remain respected. Otherwise, we default to TERMIOS except for a few |
| * systems that require something different. |
| * |
| * Note: we do not use SGTTY unless it's defined by the configuration. We |
| * may eventually opt to remove its use entirely. |
| */ |
| |
| # if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY) |
| |
| # if defined(_LIBC) |
| # undef TERMIOS |
| # define TERMIO |
| # undef SGTTY |
| /* |
| * We know that VMS, MSDOS, VXWORKS, use entirely other mechanisms. |
| */ |
| # elif !defined(OPENSSL_SYS_VMS) \ |
| && !defined(OPENSSL_SYS_MSDOS) \ |
| && !defined(OPENSSL_SYS_VXWORKS) |
| # define TERMIOS |
| # undef TERMIO |
| # undef SGTTY |
| # endif |
| |
| # endif |
| |
| # if defined(OPENSSL_SYS_VXWORKS) |
| # undef TERMIOS |
| # undef TERMIO |
| # undef SGTTY |
| # endif |
| |
| # ifdef TERMIOS |
| # include <termios.h> |
| # define TTY_STRUCT struct termios |
| # define TTY_FLAGS c_lflag |
| # define TTY_get(tty,data) tcgetattr(tty,data) |
| # define TTY_set(tty,data) tcsetattr(tty,TCSANOW,data) |
| # endif |
| |
| # ifdef TERMIO |
| # include <termio.h> |
| # define TTY_STRUCT struct termio |
| # define TTY_FLAGS c_lflag |
| # define TTY_get(tty,data) ioctl(tty,TCGETA,data) |
| # define TTY_set(tty,data) ioctl(tty,TCSETA,data) |
| # endif |
| |
| # ifdef SGTTY |
| # include <sgtty.h> |
| # define TTY_STRUCT struct sgttyb |
| # define TTY_FLAGS sg_flags |
| # define TTY_get(tty,data) ioctl(tty,TIOCGETP,data) |
| # define TTY_set(tty,data) ioctl(tty,TIOCSETP,data) |
| # endif |
| |
| # if !defined(_LIBC) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && ! (defined(OPENSSL_SYS_TANDEM) && defined(_SPT_MODEL_)) |
| # include <sys/ioctl.h> |
| # endif |
| |
| # ifdef OPENSSL_SYS_MSDOS |
| # include <conio.h> |
| # endif |
| |
| # ifdef OPENSSL_SYS_VMS |
| # include <ssdef.h> |
| # include <iodef.h> |
| # include <ttdef.h> |
| # include <descrip.h> |
| struct IOSB { |
| short iosb$w_value; |
| short iosb$w_count; |
| long iosb$l_info; |
| }; |
| # endif |
| |
| # ifndef NX509_SIG |
| # define NX509_SIG 32 |
| # endif |
| |
| /* Define globals. They are protected by a lock */ |
| # ifdef SIGACTION |
| static struct sigaction savsig[NX509_SIG]; |
| # else |
| static void (*savsig[NX509_SIG]) (int); |
| # endif |
| |
| # ifdef OPENSSL_SYS_VMS |
| static struct IOSB iosb; |
| static $DESCRIPTOR(terminal, "TT"); |
| static long tty_orig[3], tty_new[3]; /* XXX Is there any guarantee that this |
| * will always suffice for the actual |
| * structures? */ |
| static long status; |
| static unsigned short channel = 0; |
| # elif defined(_WIN32) && !defined(_WIN32_WCE) |
| static DWORD tty_orig, tty_new; |
| # else |
| # if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__) |
| static TTY_STRUCT tty_orig, tty_new; |
| # endif |
| # endif |
| static FILE *tty_in, *tty_out; |
| static int is_a_tty; |
| |
| /* Declare static functions */ |
| # if !defined(OPENSSL_SYS_WINCE) |
| static int read_till_nl(FILE *); |
| static void recsig(int); |
| static void pushsig(void); |
| static void popsig(void); |
| # endif |
| # if defined(OPENSSL_SYS_MSDOS) && !defined(_WIN32) |
| static int noecho_fgets(char *buf, int size, FILE *tty); |
| # endif |
| static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl); |
| |
| static int read_string(UI *ui, UI_STRING *uis); |
| static int write_string(UI *ui, UI_STRING *uis); |
| |
| static int open_console(UI *ui); |
| static int echo_console(UI *ui); |
| static int noecho_console(UI *ui); |
| static int close_console(UI *ui); |
| |
| /* |
| * The following function makes sure that info and error strings are printed |
| * before any prompt. |
| */ |
| static int write_string(UI *ui, UI_STRING *uis) |
| { |
| switch (UI_get_string_type(uis)) { |
| case UIT_ERROR: |
| case UIT_INFO: |
| fputs(UI_get0_output_string(uis), tty_out); |
| fflush(tty_out); |
| break; |
| case UIT_NONE: |
| case UIT_PROMPT: |
| case UIT_VERIFY: |
| case UIT_BOOLEAN: |
| break; |
| } |
| return 1; |
| } |
| |
| static int read_string(UI *ui, UI_STRING *uis) |
| { |
| int ok = 0; |
| |
| switch (UI_get_string_type(uis)) { |
| case UIT_BOOLEAN: |
| fputs(UI_get0_output_string(uis), tty_out); |
| fputs(UI_get0_action_string(uis), tty_out); |
| fflush(tty_out); |
| return read_string_inner(ui, uis, |
| UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, |
| 0); |
| case UIT_PROMPT: |
| fputs(UI_get0_output_string(uis), tty_out); |
| fflush(tty_out); |
| return read_string_inner(ui, uis, |
| UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, |
| 1); |
| case UIT_VERIFY: |
| fprintf(tty_out, "Verifying - %s", UI_get0_output_string(uis)); |
| fflush(tty_out); |
| if ((ok = read_string_inner(ui, uis, |
| UI_get_input_flags(uis) & |
| UI_INPUT_FLAG_ECHO, 1)) <= 0) |
| return ok; |
| if (strcmp(UI_get0_result_string(uis), UI_get0_test_string(uis)) != 0) { |
| fprintf(tty_out, "Verify failure\n"); |
| fflush(tty_out); |
| return 0; |
| } |
| break; |
| case UIT_NONE: |
| case UIT_INFO: |
| case UIT_ERROR: |
| break; |
| } |
| return 1; |
| } |
| |
| # if !defined(OPENSSL_SYS_WINCE) |
| /* Internal functions to read a string without echoing */ |
| static int read_till_nl(FILE *in) |
| { |
| # define SIZE 4 |
| char buf[SIZE + 1]; |
| |
| do { |
| if (!fgets(buf, SIZE, in)) |
| return 0; |
| } while (strchr(buf, '\n') == NULL); |
| return 1; |
| } |
| |
| static volatile sig_atomic_t intr_signal; |
| # endif |
| |
| static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl) |
| { |
| static int ps; |
| int ok; |
| char result[BUFSIZ]; |
| int maxsize = BUFSIZ - 1; |
| # if !defined(OPENSSL_SYS_WINCE) |
| char *p = NULL; |
| int echo_eol = !echo; |
| |
| intr_signal = 0; |
| ok = 0; |
| ps = 0; |
| |
| pushsig(); |
| ps = 1; |
| |
| if (!echo && !noecho_console(ui)) |
| goto error; |
| ps = 2; |
| |
| result[0] = '\0'; |
| # if defined(_WIN32) |
| if (is_a_tty) { |
| DWORD numread; |
| # if defined(CP_UTF8) |
| if (GetEnvironmentVariableW(L"OPENSSL_WIN32_UTF8", NULL, 0) != 0) { |
| WCHAR wresult[BUFSIZ]; |
| |
| if (ReadConsoleW(GetStdHandle(STD_INPUT_HANDLE), |
| wresult, maxsize, &numread, NULL)) { |
| if (numread >= 2 && |
| wresult[numread-2] == L'\r' && |
| wresult[numread-1] == L'\n') { |
| wresult[numread-2] = L'\n'; |
| numread--; |
| } |
| wresult[numread] = '\0'; |
| if (WideCharToMultiByte(CP_UTF8, 0, wresult, -1, |
| result, sizeof(result), NULL, 0) > 0) |
| p = result; |
| |
| OPENSSL_cleanse(wresult, sizeof(wresult)); |
| } |
| } else |
| # endif |
| if (ReadConsoleA(GetStdHandle(STD_INPUT_HANDLE), |
| result, maxsize, &numread, NULL)) { |
| if (numread >= 2 && |
| result[numread-2] == '\r' && result[numread-1] == '\n') { |
| result[numread-2] = '\n'; |
| numread--; |
| } |
| result[numread] = '\0'; |
| p = result; |
| } |
| } else |
| # elif defined(OPENSSL_SYS_MSDOS) |
| if (!echo) { |
| noecho_fgets(result, maxsize, tty_in); |
| p = result; /* FIXME: noecho_fgets doesn't return errors */ |
| } else |
| # endif |
| p = fgets(result, maxsize, tty_in); |
| if (p == NULL) |
| goto error; |
| if (feof(tty_in)) |
| goto error; |
| if (ferror(tty_in)) |
| goto error; |
| if ((p = (char *)strchr(result, '\n')) != NULL) { |
| if (strip_nl) |
| *p = '\0'; |
| } else if (!read_till_nl(tty_in)) |
| goto error; |
| if (UI_set_result(ui, uis, result) >= 0) |
| ok = 1; |
| |
| error: |
| if (intr_signal == SIGINT) |
| ok = -1; |
| if (echo_eol) |
| fprintf(tty_out, "\n"); |
| if (ps >= 2 && !echo && !echo_console(ui)) |
| ok = 0; |
| |
| if (ps >= 1) |
| popsig(); |
| # else |
| ok = 1; |
| # endif |
| |
| OPENSSL_cleanse(result, BUFSIZ); |
| return ok; |
| } |
| |
| /* Internal functions to open, handle and close a channel to the console. */ |
| static int open_console(UI *ui) |
| { |
| if (!CRYPTO_THREAD_write_lock(ui->lock)) |
| return 0; |
| is_a_tty = 1; |
| |
| # if defined(OPENSSL_SYS_VXWORKS) |
| tty_in = stdin; |
| tty_out = stderr; |
| # elif defined(_WIN32) && !defined(_WIN32_WCE) |
| if ((tty_out = fopen("conout$", "w")) == NULL) |
| tty_out = stderr; |
| |
| if (GetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), &tty_orig)) { |
| tty_in = stdin; |
| } else { |
| is_a_tty = 0; |
| if ((tty_in = fopen("conin$", "r")) == NULL) |
| tty_in = stdin; |
| } |
| # else |
| # ifdef OPENSSL_SYS_MSDOS |
| # define DEV_TTY "con" |
| # else |
| # define DEV_TTY "/dev/tty" |
| # endif |
| if ((tty_in = fopen(DEV_TTY, "r")) == NULL) |
| tty_in = stdin; |
| if ((tty_out = fopen(DEV_TTY, "w")) == NULL) |
| tty_out = stderr; |
| # endif |
| |
| # if defined(TTY_get) && !defined(OPENSSL_SYS_VMS) |
| if (TTY_get(fileno(tty_in), &tty_orig) == -1) { |
| # ifdef ENOTTY |
| if (errno == ENOTTY) |
| is_a_tty = 0; |
| else |
| # endif |
| # ifdef EINVAL |
| /* |
| * Ariel Glenn reports that solaris can return EINVAL instead. |
| * This should be ok |
| */ |
| if (errno == EINVAL) |
| is_a_tty = 0; |
| else |
| # endif |
| # ifdef ENXIO |
| /* |
| * Solaris can return ENXIO. |
| * This should be ok |
| */ |
| if (errno == ENXIO) |
| is_a_tty = 0; |
| else |
| # endif |
| # ifdef EIO |
| /* |
| * Linux can return EIO. |
| * This should be ok |
| */ |
| if (errno == EIO) |
| is_a_tty = 0; |
| else |
| # endif |
| # ifdef EPERM |
| /* |
| * Linux can return EPERM (Operation not permitted), |
| * e.g. if a daemon executes openssl via fork()+execve() |
| * This should be ok |
| */ |
| if (errno == EPERM) |
| is_a_tty = 0; |
| else |
| # endif |
| # ifdef ENODEV |
| /* |
| * MacOS X returns ENODEV (Operation not supported by device), |
| * which seems appropriate. |
| */ |
| if (errno == ENODEV) |
| is_a_tty = 0; |
| else |
| # endif |
| { |
| ERR_raise_data(ERR_LIB_UI, UI_R_UNKNOWN_TTYGET_ERRNO_VALUE, |
| "errno=%d", errno); |
| return 0; |
| } |
| } |
| # endif |
| # ifdef OPENSSL_SYS_VMS |
| status = sys$assign(&terminal, &channel, 0, 0); |
| |
| /* if there isn't a TT device, something is very wrong */ |
| if (status != SS$_NORMAL) { |
| ERR_raise_data(ERR_LIB_UI, UI_R_SYSASSIGN_ERROR, |
| "status=%%X%08X", status); |
| return 0; |
| } |
| |
| status = sys$qiow(0, channel, IO$_SENSEMODE, &iosb, 0, 0, tty_orig, 12, |
| 0, 0, 0, 0); |
| |
| /* If IO$_SENSEMODE doesn't work, this is not a terminal device */ |
| if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL)) |
| is_a_tty = 0; |
| # endif |
| return 1; |
| } |
| |
| static int noecho_console(UI *ui) |
| { |
| # ifdef TTY_FLAGS |
| memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig)); |
| tty_new.TTY_FLAGS &= ~ECHO; |
| # endif |
| |
| # if defined(TTY_set) && !defined(OPENSSL_SYS_VMS) |
| if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1)) |
| return 0; |
| # endif |
| # ifdef OPENSSL_SYS_VMS |
| if (is_a_tty) { |
| tty_new[0] = tty_orig[0]; |
| tty_new[1] = tty_orig[1] | TT$M_NOECHO; |
| tty_new[2] = tty_orig[2]; |
| status = sys$qiow(0, channel, IO$_SETMODE, &iosb, 0, 0, tty_new, 12, |
| 0, 0, 0, 0); |
| if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL)) { |
| ERR_raise_data(ERR_LIB_UI, UI_R_SYSQIOW_ERROR, |
| "status=%%X%08X, iosb.iosb$w_value=%%X%08X", |
| status, iosb.iosb$w_value); |
| return 0; |
| } |
| } |
| # endif |
| # if defined(_WIN32) && !defined(_WIN32_WCE) |
| if (is_a_tty) { |
| tty_new = tty_orig; |
| tty_new &= ~ENABLE_ECHO_INPUT; |
| SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new); |
| } |
| # endif |
| return 1; |
| } |
| |
| static int echo_console(UI *ui) |
| { |
| # if defined(TTY_set) && !defined(OPENSSL_SYS_VMS) |
| memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig)); |
| if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1)) |
| return 0; |
| # endif |
| # ifdef OPENSSL_SYS_VMS |
| if (is_a_tty) { |
| tty_new[0] = tty_orig[0]; |
| tty_new[1] = tty_orig[1]; |
| tty_new[2] = tty_orig[2]; |
| status = sys$qiow(0, channel, IO$_SETMODE, &iosb, 0, 0, tty_new, 12, |
| 0, 0, 0, 0); |
| if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL)) { |
| ERR_raise_data(ERR_LIB_UI, UI_R_SYSQIOW_ERROR, |
| "status=%%X%08X, iosb.iosb$w_value=%%X%08X", |
| status, iosb.iosb$w_value); |
| return 0; |
| } |
| } |
| # endif |
| # if defined(_WIN32) && !defined(_WIN32_WCE) |
| if (is_a_tty) { |
| tty_new = tty_orig; |
| SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new); |
| } |
| # endif |
| return 1; |
| } |
| |
| static int close_console(UI *ui) |
| { |
| int ret = 1; |
| |
| if (tty_in != stdin) |
| fclose(tty_in); |
| if (tty_out != stderr) |
| fclose(tty_out); |
| # ifdef OPENSSL_SYS_VMS |
| status = sys$dassgn(channel); |
| if (status != SS$_NORMAL) { |
| ERR_raise_data(ERR_LIB_UI, UI_R_SYSDASSGN_ERROR, |
| "status=%%X%08X", status); |
| ret = 0; |
| } |
| # endif |
| CRYPTO_THREAD_unlock(ui->lock); |
| |
| return ret; |
| } |
| |
| # if !defined(OPENSSL_SYS_WINCE) |
| /* Internal functions to handle signals and act on them */ |
| static void pushsig(void) |
| { |
| # ifndef OPENSSL_SYS_WIN32 |
| int i; |
| # endif |
| # ifdef SIGACTION |
| struct sigaction sa; |
| |
| memset(&sa, 0, sizeof(sa)); |
| sa.sa_handler = recsig; |
| # endif |
| |
| # ifdef OPENSSL_SYS_WIN32 |
| savsig[SIGABRT] = signal(SIGABRT, recsig); |
| savsig[SIGFPE] = signal(SIGFPE, recsig); |
| savsig[SIGILL] = signal(SIGILL, recsig); |
| savsig[SIGINT] = signal(SIGINT, recsig); |
| savsig[SIGSEGV] = signal(SIGSEGV, recsig); |
| savsig[SIGTERM] = signal(SIGTERM, recsig); |
| # else |
| for (i = 1; i < NX509_SIG; i++) { |
| # ifdef SIGUSR1 |
| if (i == SIGUSR1) |
| continue; |
| # endif |
| # ifdef SIGUSR2 |
| if (i == SIGUSR2) |
| continue; |
| # endif |
| # ifdef SIGKILL |
| if (i == SIGKILL) /* We can't make any action on that. */ |
| continue; |
| # endif |
| # ifdef SIGACTION |
| sigaction(i, &sa, &savsig[i]); |
| # else |
| savsig[i] = signal(i, recsig); |
| # endif |
| } |
| # endif |
| |
| # ifdef SIGWINCH |
| signal(SIGWINCH, SIG_DFL); |
| # endif |
| } |
| |
| static void popsig(void) |
| { |
| # ifdef OPENSSL_SYS_WIN32 |
| signal(SIGABRT, savsig[SIGABRT]); |
| signal(SIGFPE, savsig[SIGFPE]); |
| signal(SIGILL, savsig[SIGILL]); |
| signal(SIGINT, savsig[SIGINT]); |
| signal(SIGSEGV, savsig[SIGSEGV]); |
| signal(SIGTERM, savsig[SIGTERM]); |
| # else |
| int i; |
| for (i = 1; i < NX509_SIG; i++) { |
| # ifdef SIGUSR1 |
| if (i == SIGUSR1) |
| continue; |
| # endif |
| # ifdef SIGUSR2 |
| if (i == SIGUSR2) |
| continue; |
| # endif |
| # ifdef SIGACTION |
| sigaction(i, &savsig[i], NULL); |
| # else |
| signal(i, savsig[i]); |
| # endif |
| } |
| # endif |
| } |
| |
| static void recsig(int i) |
| { |
| intr_signal = i; |
| } |
| # endif |
| |
| /* Internal functions specific for Windows */ |
| # if defined(OPENSSL_SYS_MSDOS) && !defined(_WIN32) |
| static int noecho_fgets(char *buf, int size, FILE *tty) |
| { |
| int i; |
| char *p; |
| |
| p = buf; |
| for (;;) { |
| if (size == 0) { |
| *p = '\0'; |
| break; |
| } |
| size--; |
| # if defined(_WIN32) |
| i = _getch(); |
| # else |
| i = getch(); |
| # endif |
| if (i == '\r') |
| i = '\n'; |
| *(p++) = i; |
| if (i == '\n') { |
| *p = '\0'; |
| break; |
| } |
| } |
| # ifdef WIN_CONSOLE_BUG |
| /* |
| * Win95 has several evil console bugs: one of these is that the last |
| * character read using getch() is passed to the next read: this is |
| * usually a CR so this can be trouble. No STDIO fix seems to work but |
| * flushing the console appears to do the trick. |
| */ |
| { |
| HANDLE inh; |
| inh = GetStdHandle(STD_INPUT_HANDLE); |
| FlushConsoleInputBuffer(inh); |
| } |
| # endif |
| return strlen(buf); |
| } |
| # endif |
| |
| static UI_METHOD ui_openssl = { |
| "OpenSSL default user interface", |
| open_console, |
| write_string, |
| NULL, /* No flusher is needed for command lines */ |
| read_string, |
| close_console, |
| NULL |
| }; |
| |
| /* The method with all the built-in console thingies */ |
| UI_METHOD *UI_OpenSSL(void) |
| { |
| return &ui_openssl; |
| } |
| |
| static const UI_METHOD *default_UI_meth = &ui_openssl; |
| |
| #else |
| |
| static const UI_METHOD *default_UI_meth = NULL; |
| |
| #endif |
| |
| void UI_set_default_method(const UI_METHOD *meth) |
| { |
| default_UI_meth = meth; |
| } |
| |
| const UI_METHOD *UI_get_default_method(void) |
| { |
| return default_UI_meth; |
| } |
