libbb: factor out code which queries screen width

function                                             old     new   delta
get_terminal_width                                     -      17     +17
stty_main                                           1196    1197      +1
pstree_main                                          321     319      -2
ls_main                                              735     731      -4
watch_main                                           232     225      -7
bb_progress_update                                   714     706      -8
ps_main                                              555     543     -12
run_applet_and_exit                                  708     695     -13
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/6 up/down: 18/-46)            Total: -28 byte

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c
index 0c9969640..206edb4a0 100644
--- a/libbb/xfuncs.c
+++ b/libbb/xfuncs.c
@@ -270,6 +270,12 @@ int FAST_FUNC get_terminal_width_height(int fd, unsigned *width, unsigned *heigh
                 *width = wh_helper(win.ws_col, 80, "COLUMNS", &err);
         return err;
 }
+int FAST_FUNC get_terminal_width(int fd)
+{
+        unsigned width;
+        get_terminal_width_height(fd, &width, NULL);
+        return width;
+}
 
 int FAST_FUNC tcsetattr_stdin_TCSANOW(const struct termios *tp)
 {