top: swat bug affecting batch mode and width provision

Normally, the internally tracked 'Screen_cols' can not
exceed the lessor of 512 or actual screen width. There
was one case, however, where that 512 byte upper limit
was no longer properly imposed as it should have been.

When operating in 'Batch' mode the actual screen width
was allowed to be exceeded when the optional -w switch
was also used. But, it should never have exceeded 512.

This patch ensures the upper limit is always observed.

Reference(s):
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=721204

Signed-off-by: Jim Warner <james.warner@comcast.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/top/top.c b/top/top.c
index bdfcf20..9996fbf 100644
--- a/top/top.c
+++ b/top/top.c
@@ -1792,6 +1792,7 @@ static void adj_geometry (void) {
          if (w_cols && w_cols < W_MIN_COL) w_cols = W_MIN_COL;
          if (w_rows && w_rows < W_MIN_ROW) w_rows = W_MIN_ROW;
       }
+      if (w_cols > SCREENMAX) w_cols = SCREENMAX;
       w_set = 1;
    }