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List:       stunnel-users
Subject:    Re: imapd logout error messages
From:       Hans Werner Strube <strube () physik3 ! gwdg ! de>
Date:       2001-09-19 9:41:08
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> Below there is a portion of a "truss" log related to the occurrence of
> >  SSL_read (SSL_ERROR_SYSCALL): Interrupted system call (4)
> >  linger (local): Interrupted system call (4)
> in stunnel-3.20 when a "-l" client exits. The strange thing is that the
> last errno values are still 131 and 22, respectively, as in 3.18; but the
> above error messages (written by putmsg) show 4 instead.
> Somehow errno seems to get overwritten before it is used in sockerror().

I found the reason. In multithreaded programs, errno must not be a global
variable but a function, which is switched in errno.h by _REENTRANT.
The 3.20 form of common.h defines _REENTRANT only *after* #include <errno.h>.
Rather, #define _REENTRANT must occur before any #includes!
Thus, move lines 140-149 of common.h (3.20) after line 51
(if necessary(?), bracketed by #ifndef USE_WIN32 ... #endif).

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