signal is not delivered to the handler

[D.Pageau]

I have an issue with lrzsz-0.12.20.tar.gz compiled on cygwin 1.5.19-4
where lrx never timeout when xmodem error occured (hangs forever).

It look related to what Michael as reported.  I have compiled test.c
from Michael:  Same result where second signal is not delivered.  So I
have checkout cygwin from cvs and build cygwin1.dll 1.5.20(0.155/4/2)
wich solved Michael issue but infortunatly lrzsz still hangs.

It look like read() should exit on SIGALRM but it's not the case.

zreadline.c
(...)

 signal(SIGALRM, zreadline_alarm_handler);
 alarm(n);
}
else if (Verbose > 5)
 vstringf("Calling read: Readnum=%d ",readline_readnum);

readline_ptr=readline_buffer;
readline_left=read(readline_fd, readline_ptr, readline_readnum);

(...)

lrzsz available here:

http://www.ohse.de/uwe/software/lrzsz.html

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