Adopey.146
net.bugs.4bsd
utcsrgv!utzoo!decvax!duke!mcnc!unc!dopey.smb
Thu Mar 11 13:03:48 1982
sigset botch
If a sighold is done, a subsequent sigset call will return SIG_HOLD
rather than a routine address. An attempt to use this value will store
a bad address -- 3! -- so that any occurrence of the signal will send
the program flaming down the tubes. That is, a sequence like this will
fail (miserably):
sighold(SIGINT);
...
s = sigset(SIGINT, myint);
....
sigset(SIGINT, s);
It's a problem because closed subroutine often like to take their own
actions with knowing the current state of affairs. I've tripped over
this in some versions of ucbmail.
-----------------------------------------------------------------
gopher://quux.org/ conversion by John Goerzen <
[email protected]>
of
http://communication.ucsd.edu/A-News/
This Usenet Oldnews Archive
article may be copied and distributed freely, provided:
1. There is no money collected for the text(s) of the articles.
2. The following notice remains appended to each copy:
The Usenet Oldnews Archive: Compilation Copyright (C) 1981, 1996
Bruce Jones, Henry Spencer, David Wiseman.