1 files changed, 99 insertions, 0 deletions

diff --git a/miscutils/less.c b/miscutils/less.c
index 2204b1cec..5a8fc5a74 100644
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -145,6 +145,10 @@
 
 #include <sched.h>  /* sched_yield() */
 
+#if ENABLE_PLATFORM_MINGW32
+#include <conio.h>
+#endif
+
 #include "libbb.h"
 #include "common_bufsiz.h"
 #if ENABLE_FEATURE_LESS_REGEXP
@@ -330,7 +334,11 @@ static void restore_tty(void)
         set_tty_cooked();
         if (!(G.kbd_fd_orig_flags & O_NONBLOCK))
                 ndelay_off(kbd_fd);
+#if !ENABLE_PLATFORM_MINGW32
         clear_line();
+#else
+        printf(ESC"[?1049l");
+#endif
 }
 
 static NOINLINE void less_exit(void)
@@ -578,6 +586,11 @@ static void read_lines(void)
                                 last_line_pos = 0;
                                 break;
                         }
+#if ENABLE_PLATFORM_MINGW32
+                        if (c == '\r') {
+                                continue;
+                        }
+#endif
                         /* NUL is substituted by '\n'! */
                         if (c == '\0') c = '\n';
                         *p++ = c;
@@ -674,7 +687,12 @@ static void update_num_lines(void)
         /* only do this for regular files */
         if (num_lines == REOPEN_AND_COUNT || num_lines == REOPEN_STDIN) {
                 count = 0;
+#if !ENABLE_PLATFORM_MINGW32
                 fd = open("/proc/self/fd/0", O_RDONLY);
+#else
+                /* don't even try to access /proc on WIN32 */
+                fd = -1;
+#endif
                 if (fd < 0 && num_lines == REOPEN_AND_COUNT) {
                         /* "filename" is valid only if REOPEN_AND_COUNT */
                         fd = open(filename, O_RDONLY);
@@ -857,7 +875,12 @@ static void print_found(const char *line)
                         match_status = 1;
         }
 
+#if !ENABLE_PLATFORM_MINGW32
         printf("%s%s\n", growline ? growline : "", str);
+#else
+        /* skip newline, we use explicit positioning on WIN32 */
+        printf("%s%s", growline ? growline : "", str);
+#endif
         free(growline);
 }
 #else
@@ -893,7 +916,12 @@ static void print_ascii(const char *str)
                 *p = '\0';
                 print_hilite(buf);
         }
+#if !ENABLE_PLATFORM_MINGW32
         puts(str);
+#else
+        /* skip newline, we use explicit positioning on WIN32 */
+        printf("%s", str);
+#endif
 }
 
 /* Print the buffer */
@@ -903,6 +931,10 @@ static void buffer_print(void)
 
         move_cursor(0, 0);
         for (i = 0; i <= max_displayed_line; i++) {
+#if ENABLE_PLATFORM_MINGW32
+                /* make sure we're on the right line */
+                move_cursor(i+1, 0);
+#endif
                 printf(CLEAR_2_EOL);
                 if (option_mask32 & FLAG_N)
                         print_lineno(buffer[i]);
@@ -1090,10 +1122,17 @@ static void reinitialize(void)
         if (G.winsize_err)
                 printf(ESC"[999;999H" ESC"[6n");
 #endif
+#if ENABLE_PLATFORM_MINGW32
+        printf(ESC"[?1049h");
+#endif
         buffer_fill_and_print();
 }
 
+#if ENABLE_PLATFORM_MINGW32
+static int64_t unix_getch_nowait(void)
+#else
 static int64_t getch_nowait(void)
+#endif
 {
         int rd;
         int64_t key64;
@@ -1155,6 +1194,50 @@ static int64_t getch_nowait(void)
         return key64;
 }
 
+#if ENABLE_PLATFORM_MINGW32
+static int64_t getch_nowait(void)
+{
+        int64_t c;
+
+        if (terminal_mode(FALSE) & VT_INPUT)
+                return unix_getch_nowait();
+
+retry:
+        c = _getch();
+        if (c == 0 || c == 0xe0) {
+                switch (_getch()) {
+                case 0x48:
+                        c = KEYCODE_UP;
+                        break;
+                case 0x50:
+                        c = KEYCODE_DOWN;
+                        break;
+                case 0x49:
+                        c = KEYCODE_PAGEUP;
+                        break;
+                case 0x51:
+                        c = KEYCODE_PAGEDOWN;
+                        break;
+                case 0x47:
+                        c = KEYCODE_HOME;
+                        break;
+                case 0x4f:
+                        c = KEYCODE_END;
+                        break;
+                default:
+                        goto retry;
+                }
+        }
+
+        /* Position cursor if line input is done */
+        if (less_gets_pos >= 0)
+                move_cursor(max_displayed_line + 2, less_gets_pos + 1);
+        fflush_all();
+
+        return c;
+}
+#endif
+
 /* Grab a character from input without requiring the return key.
  * May return KEYCODE_xxx values.
  * Note that this function works best with raw input. */
@@ -1794,11 +1877,13 @@ static void keypress_process(int keypress)
                 number_process(keypress);
 }
 
+#if !ENABLE_PLATFORM_MINGW32
 static void sig_catcher(int sig)
 {
         restore_tty();
         kill_myself_with_sig(sig); /* does not return */
 }
+#endif
 
 #if ENABLE_FEATURE_LESS_WINCH
 static void sigwinch_handler(int sig UNUSED_PARAM)
@@ -1810,7 +1895,11 @@ static void sigwinch_handler(int sig UNUSED_PARAM)
 int less_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int less_main(int argc, char **argv)
 {
+#if !ENABLE_PLATFORM_MINGW32
         char *tty_name;
+#else
+        HANDLE h;
+#endif
         int tty_fd;
 
         INIT_G();
@@ -1869,6 +1958,7 @@ int less_main(int argc, char **argv)
         if (option_mask32 & FLAG_TILDE)
                 empty_line_marker = "";
 
+#if !ENABLE_PLATFORM_MINGW32
         /* Some versions of less can survive w/o controlling tty,
          * try to do the same. This also allows to specify an alternative
          * tty via "less 1<>TTY".
@@ -1894,6 +1984,15 @@ int less_main(int argc, char **argv)
         }
         G.kbd_fd_orig_flags = ndelay_on(tty_fd);
         kbd_fd = tty_fd; /* save in a global */
+#else
+        h = CreateFileA("CONIN$", GENERIC_READ | GENERIC_WRITE,
+                                        FILE_SHARE_READ, NULL, OPEN_EXISTING,
+                                        FILE_ATTRIBUTE_NORMAL, NULL);
+        if (h == INVALID_HANDLE_VALUE)
+                bb_simple_error_msg_and_die("unable to open console");
+
+        kbd_fd = tty_fd = _open_osfhandle((intptr_t)h, O_BINARY);
+#endif
 
         get_termios_and_make_raw(tty_fd, &term_less, &term_orig, TERMIOS_RAW_CRNL_INPUT);