Date: Tue, 11 Mar 2003 22:21:48 +1100 (EST) From: Bruce Evans <bde@zeta.org.au> To: David Xu <davidxu@freebsd.org> Cc: src-committers@freebsd.org, "" <cvs-src@freebsd.org>, "" <cvs-all@freebsd.org> Subject: Re: cvs commit: src/usr.bin/su su.c Message-ID: <20030311220538.U24745@gamplex.bde.org> In-Reply-To: <000501c2e7ad$48ab2790$f001a8c0@davidw2k> References: <200303110010.h2B0ANe3061768@repoman.freebsd.org> <20030311180357.E23929@gamplex.bde.org> <000501c2e7ad$48ab2790$f001a8c0@davidw2k>
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On Tue, 11 Mar 2003, David Xu wrote: > Unfortunately I had ignored code for child process :( > BTW, The SIGTSTP handler will be reset by execsigs() in kernel, > The garbage sa_tstp is only effective in very short time. execsigs() only resets caught signals, so the garbage lives at least a little longer if happened to set to SIG_IGN. For the same reason, we can't depend on execsigs() changing SIG_IGN to SIG_DFL for the parent. I think the stack garbage is always 0 on i386 (since we're in main() and have barely used the stack), and SIG_DFL happens to be 0, so the contents of the garbage is probably correct for setting the signal to SIG_DFL except it doesn't have SA_RESTART set. Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-src" in the body of the message
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