# HG changeset patch
# User Mark Round <hg@markround.com>
# Date 1336998342 -3600
# Node ID 7002bb17cc5eceb8c1ab792bdaf10bd96c08c8d8
# Parent  7bf48bc7de23ac9479e41e6333db421e84b4e1ab
posix: workaround lack of TIOCGWINSZ on Irix (issue3449)

On an Irix 6.5.24 system, TIOCGWINSZ is not available. This means that
any usage of the "hg" tool that looks up the terminal size (e.g. "hg
help") will fail with an AttributeError.

A simple work-around is just to wrap this block in mercurial/posix.py
with a try/except so that it ends up using the default 80 characters
width.

diff -r 7bf48bc7de23 -r 7002bb17cc5e mercurial/posix.py
--- a/mercurial/posix.py	Mon May 14 12:56:43 2012 +0200
+++ b/mercurial/posix.py	Mon May 14 13:25:42 2012 +0100
@@ -409,10 +409,13 @@
                     continue
                 if not os.isatty(fd):
                     continue
-                arri = fcntl.ioctl(fd, termios.TIOCGWINSZ, '\0' * 8)
-                width = array.array('h', arri)[1]
-                if width > 0:
-                    return width
+                try:
+                    arri = fcntl.ioctl(fd, termios.TIOCGWINSZ, '\0' * 8)
+                    width = array.array('h', arri)[1]
+                    if width > 0:
+                        return width
+                except AttributeError:
+                    pass
             except ValueError:
                 pass
             except IOError, e: