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authorWojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>2021-04-30 00:33:56 +0200
committerWojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>2021-04-30 00:33:56 +0200
commitaa4d426b4d3527d7e166df1a05058c9a4a0f6683 (patch)
tree4ff17ce8b89a2321b9d0ed4bcfc37c447bcb6820 /openssl-1.1.0h/crypto/ui/ui_openssl.c
downloadsmtps-and-pop3s-console-program-master.tar.gz
smtps-and-pop3s-console-program-master.zip
initial/final commitHEADmaster
Diffstat (limited to 'openssl-1.1.0h/crypto/ui/ui_openssl.c')
-rw-r--r--openssl-1.1.0h/crypto/ui/ui_openssl.c712
1 files changed, 712 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/ui/ui_openssl.c b/openssl-1.1.0h/crypto/ui/ui_openssl.c
new file mode 100644
index 0000000..8fa8dec
--- /dev/null
+++ b/openssl-1.1.0h/crypto/ui/ui_openssl.c
@@ -0,0 +1,712 @@
+/*
+ * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (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 <openssl/e_os2.h>
+#include <openssl/err.h>
+
+/*
+ * 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)
+# ifdef OPENSSL_UNISTD
+# include OPENSSL_UNISTD
+# else
+# include <unistd.h>
+# endif
+/*
+ * If unistd.h defines _POSIX_VERSION, we conclude that we are on a POSIX
+ * system and have sigaction and termios.
+ */
+# if defined(_POSIX_VERSION)
+
+# define SIGACTION
+# if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
+# define TERMIOS
+# endif
+
+# endif
+#endif
+
+/* 06-Apr-92 Luke Brennan Support for VMS */
+#include "ui_locl.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 it's 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
+
+#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)
+# 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);
+
+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
+};
+
+static const UI_METHOD *default_UI_meth = &ui_openssl;
+
+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;
+}
+
+/* The method with all the built-in thingies */
+UI_METHOD *UI_OpenSSL(void)
+{
+ return &ui_openssl;
+}
+
+/*
+ * 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;
+ default:
+ 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;
+ default:
+ 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)
+{
+ CRYPTO_THREAD_write_lock(ui->lock);
+ 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$", "r")) == NULL)
+ tty_in = stdin;
+ }
+#else
+# ifdef OPENSSL_SYS_MSDOS
+# define DEV_TTY "con"
+# else
+# define DEV_TTY "/dev/tty"
+# endif
+ if ((tty_in = fopen(DEV_TTY, "r")) == NULL)
+ tty_in = stdin;
+ if ((tty_out = fopen(DEV_TTY, "w")) == NULL)
+ tty_out = stderr;
+#endif
+
+#if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
+ if (TTY_get(fileno(tty_in), &tty_orig) == -1) {
+# ifdef ENOTTY
+ if (errno == ENOTTY)
+ is_a_tty = 0;
+ else
+# endif
+# ifdef EINVAL
+ /*
+ * Ariel Glenn ariel@columbia.edu reports that solaris can return
+ * EINVAL instead. This should be ok
+ */
+ if (errno == EINVAL)
+ is_a_tty = 0;
+ else
+# endif
+# ifdef ENODEV
+ /*
+ * MacOS X returns ENODEV (Operation not supported by device),
+ * which seems appropriate.
+ */
+ if (errno == ENODEV)
+ is_a_tty = 0;
+ else
+# endif
+ {
+ char tmp_num[10];
+ BIO_snprintf(tmp_num, sizeof(tmp_num) - 1, "%d", errno);
+ UIerr(UI_F_OPEN_CONSOLE, UI_R_UNKNOWN_TTYGET_ERRNO_VALUE);
+ ERR_add_error_data(2, "errno=", tmp_num);
+
+ return 0;
+ }
+ }
+#endif
+#ifdef OPENSSL_SYS_VMS
+ status = sys$assign(&terminal, &channel, 0, 0);
+
+ /* if there isn't a TT device, something is very wrong */
+ if (status != SS$_NORMAL) {
+ char tmp_num[12];
+
+ BIO_snprintf(tmp_num, sizeof(tmp_num) - 1, "%%X%08X", status);
+ UIerr(UI_F_OPEN_CONSOLE, UI_R_SYSASSIGN_ERROR);
+ ERR_add_error_data(2, "status=", tmp_num);
+ return 0;
+ }
+
+ status = sys$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$_NORMAL)) {
+ char tmp_num[2][12];
+
+ BIO_snprintf(tmp_num[0], sizeof(tmp_num[0]) - 1, "%%X%08X",
+ status);
+ BIO_snprintf(tmp_num[1], sizeof(tmp_num[1]) - 1, "%%X%08X",
+ iosb.iosb$w_value);
+ UIerr(UI_F_NOECHO_CONSOLE, UI_R_SYSQIOW_ERROR);
+ ERR_add_error_data(5, "status=", tmp_num[0],
+ ",", "iosb.iosb$w_value=", tmp_num[1]);
+ return 0;
+ }
+ }
+#endif
+#if defined(_WIN32) && !defined(_WIN32_WCE)
+ if (is_a_tty) {
+ tty_new = tty_orig;
+ tty_new &= ~ENABLE_ECHO_INPUT;
+ SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new);
+ }
+#endif
+ return 1;
+}
+
+static int echo_console(UI *ui)
+{
+#if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
+ memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig));
+ tty_new.TTY_FLAGS |= ECHO;
+#endif
+
+#if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
+ if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1))
+ return 0;
+#endif
+#ifdef OPENSSL_SYS_VMS
+ if (is_a_tty) {
+ tty_new[0] = tty_orig[0];
+ tty_new[1] = tty_orig[1] & ~TT$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$_NORMAL)) {
+ char tmp_num[2][12];
+
+ BIO_snprintf(tmp_num[0], sizeof(tmp_num[0]) - 1, "%%X%08X",
+ status);
+ BIO_snprintf(tmp_num[1], sizeof(tmp_num[1]) - 1, "%%X%08X",
+ iosb.iosb$w_value);
+ UIerr(UI_F_ECHO_CONSOLE, UI_R_SYSQIOW_ERROR);
+ ERR_add_error_data(5, "status=", tmp_num[0],
+ ",", "iosb.iosb$w_value=", tmp_num[1]);
+ return 0;
+ }
+ }
+#endif
+#if defined(_WIN32) && !defined(_WIN32_WCE)
+ if (is_a_tty) {
+ tty_new = tty_orig;
+ tty_new |= ENABLE_ECHO_INPUT;
+ SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new);
+ }
+#endif
+ return 1;
+}
+
+static int close_console(UI *ui)
+{
+ if (tty_in != stdin)
+ fclose(tty_in);
+ if (tty_out != stderr)
+ fclose(tty_out);
+#ifdef OPENSSL_SYS_VMS
+ status = sys$dassgn(channel);
+ if (status != SS$_NORMAL) {
+ char tmp_num[12];
+
+ BIO_snprintf(tmp_num, sizeof(tmp_num) - 1, "%%X%08X", status);
+ UIerr(UI_F_CLOSE_CONSOLE, UI_R_SYSDASSGN_ERROR);
+ ERR_add_error_data(2, "status=", tmp_num);
+ return 0;
+ }
+#endif
+ CRYPTO_THREAD_unlock(ui->lock);
+
+ return 1;
+}
+
+#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