- peruse get_terminal_width_height and remove legacy code for ancient

  slowaris versions.


git-svn-id: svn://busybox.net/trunk/busybox@17352 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 10 insertions, 69 deletions

diff --git a/coreutils/stty.c b/coreutils/stty.c
index a78e15c07..05d91d8c1 100644
--- a/coreutils/stty.c
+++ b/coreutils/stty.c
@@ -484,21 +484,13 @@ static void wrapf(const char *message, ...)
                 current_col = 0;
 }
 
-#ifdef TIOCGWINSZ
-
-static int get_win_size(int fd, struct winsize *win)
-{
-        return ioctl(fd, TIOCGWINSZ, (char *) win);
-}
-
-static void set_window_size(int rows, int cols)
+static void set_window_size(const int rows, const int cols)
 {
-        struct winsize win;
+        struct winsize win = { 0, 0, 0, 0};
 
-        if (get_win_size(STDIN_FILENO, &win)) {
+        if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win)) {
                 if (errno != EINVAL) {
-                        perror_on_device("%s");
-                        return;
+                        goto bail;
                 }
                 memset(&win, 0, sizeof(win));
         }
@@ -508,77 +500,26 @@ static void set_window_size(int rows, int cols)
         if (cols >= 0)
                 win.ws_col = cols;
 
-# ifdef TIOCSSIZE
-        /* Alexander Dupuy <dupuy@cs.columbia.edu> wrote:
-           The following code deals with a bug in the SunOS 4.x (and 3.x?) kernel.
-           This comment from sys/ttold.h describes Sun's twisted logic - a better
-           test would have been (ts_lines > 64k || ts_cols > 64k || ts_cols == 0).
-           At any rate, the problem is gone in Solaris 2.x */
-
-        if (win.ws_row == 0 || win.ws_col == 0) {
-                struct ttysize ttysz;
-
-                ttysz.ts_lines = win.ws_row;
-                ttysz.ts_cols = win.ws_col;
-
-                win.ws_row = win.ws_col = 1;
-
-                if ((ioctl(STDIN_FILENO, TIOCSWINSZ, (char *) &win) != 0)
-                || (ioctl(STDIN_FILENO, TIOCSSIZE, (char *) &ttysz) != 0)) {
-                        perror_on_device("%s");
-                }
-                return;
-        }
-# endif
-
         if (ioctl(STDIN_FILENO, TIOCSWINSZ, (char *) &win))
+bail:
                 perror_on_device("%s");
 }
 
-static void display_window_size(int fancy)
+static void display_window_size(const int fancy)
 {
         const char *fmt_str = "%s\0%s: no size information for this device";
-        struct winsize win;
+        unsigned width, height;
 
-        if (get_win_size(STDIN_FILENO, &win)) {
+        if (get_terminal_width_height(STDIN_FILENO, &width, &height)) {
                 if ((errno != EINVAL) || ((fmt_str += 2), !fancy)) {
                         perror_on_device(fmt_str);
                 }
         } else {
                 wrapf(fancy ? "rows %d; columns %d;" : "%d %d\n",
-                                win.ws_row, win.ws_col);
+                                height, width);
         }
 }
 
-#else /* !TIOCGWINSZ */
-
-static inline void display_window_size(int fancy) {}
-
-#endif /* !TIOCGWINSZ */
-
-static int screen_columns_or_die(void)
-{
-        const char *s;
-
-#ifdef TIOCGWINSZ
-        struct winsize win;
-
-        /* With Solaris 2.[123], this ioctl fails and errno is set to
-           EINVAL for telnet (but not rlogin) sessions.
-           On ISC 3.0, it fails for the console and the serial port
-           (but it works for ptys).
-           It can also fail on any system when stdout isn't a tty.
-           In case of any failure, just use the default */
-        if (get_win_size(STDOUT_FILENO, &win) == 0 && win.ws_col > 0)
-                return win.ws_col;
-#endif
-
-        s = getenv("COLUMNS");
-        if (s)
-                return xatoi_u(s);
-        return 80;
-}
-
 static const struct suffix_mult stty_suffixes[] = {
         {"b",  512 },
         {"k",  1024},
@@ -1183,7 +1124,7 @@ invalid_argument:
                 perror_on_device_and_die("%s");
 
         if (option_mask32 & (STTY_verbose_output | STTY_recoverable_output | STTY_noargs)) {
-                max_col = screen_columns_or_die();
+                get_terminal_width_height(STDOUT_FILENO, &max_col, NULL);
                 output_func(&mode);
                 return EXIT_SUCCESS;
         }