Update "Can I use setup to install snapshots?" (now 'no') with new instructions.

1 files changed, 25 insertions, 14 deletions

diff --git a/winsup/doc/install.texinfo b/winsup/doc/install.texinfo
index 202db8e66..816541291 100644
--- a/winsup/doc/install.texinfo
+++ b/winsup/doc/install.texinfo
@@ -199,32 +199,43 @@ would not have done any of these things for you.
 
 @subsection Can I use setup to install snapshots?
 
-Yes.  If experimenting with developer snapshots from
+No.  It used to be possible, but not any more.
+
+If experimenting with developer snapshots from
 @file{http://cygwin.com/snapshots/}, you should generally install the
 full @code{cygwin-inst-YYYYMMDD.tar.bz2} update, rather than just the
-DLL, otherwise some components may be out of sync.  However, Cygwin tar
-won't work because it will load the DLL that you're trying to update,
-and a non-Cygwin program like WinZip will put everything in the wrong
-place.  The solution is to use @code{setup.exe}.
+DLL, otherwise some components may be out of sync.  Cygwin tar won't be
+able to update @code{/usr/bin/cygwin1.dll}, but it should succeed with
+everything else.  The following steps should work:
+
+@enumerate
 
-Just bunzip2 the cygwin-inst tarball, rename it to cygwin-YYYYMMDD.tar,
-gzip it, put it in an empty directory, and run @code{setup.exe} there.
-You should be given the option to install it.
+@item Download the snapshot, and run:
+@example
+	cd /
+        tar jxvf /posix/path/to/cygwin-inst-YYYYMMDD.tar.bz2
+        cd /tmp
+        tar jxvf /posix/path/to/cygwin-inst-YYYYMMDD.tar.bz2 usr/bin/cygwin1.dll
+@end example
+
+@item After closing all Cygwin apps (see below), use Explorer or the
+Windows command shell to move @code{C:\cygwin\tmp\usr\bin\cygwin1.dll}
+to @code{C:\cygwin\bin\cygwin1.dll}.
+
+@end enumerate
 
 The obvious warnings about updating the cygwin package and using developer
 snapshots apply:
 
 @enumerate
 
-@item Always download the latest version of setup from
-@file{http://cygwin.com/setup.exe}.
-
 @item Close all Cygwin apps, including shells and services
-(e.g. inetd), before running setup.  You may have to restart Windows to
-clear the DLL from memory.
+(e.g. inetd), before updating @code{cygwin1.dll}.  You may have to
+restart Windows to clear the DLL from memory.
 
 @item Snapshots are risky.  They have not been tested.  Use them @strong{only} if
-there is a feature or bugfix that you need to try.
+there is a feature or bugfix that you need to try, and you are willing
+to deal with any problems.
 
 @item If you cannot download a snapshot from the main ftp distribution
 site, use a mirror, and look in the @samp{snapshots} directory.  You may