select() not interrupted by signals

[Thomas Wolff <towo at towo dot net>]

I had previously reported "select() hanging after terminal killed" 
(http://cygwin.com/ml/cygwin/2011-05/msg00418.html).
It turns out that select() does not get interrupted by a SIGWINCH signal 
either (with likely the same cause).
This raises problems with interactive programs that want to react to 
window size changes (like text editors).

See attached updated test case; run the program, while select() is 
waiting (before 5 second timeout each), change window size and see no 
interrupt.
On other systems, select() is interrupted (test case: from mintty, 
remote login to SunOS; also showing the terminal is not involved in the 
problem).

This bug did not exist in cygwin 1.5; I see some Changelog entries from 
2011-12-13 or 2012-01-22 which might be related.
------
Thomas

Attachment: select-intr.c
Description: Text document

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