Date: Tue, 15 Jul 2014 18:16:47 -0700 From: Isaac Dunham <ibid.ag@...il.com> To: musl@...ts.openwall.com, alpine-devel@...ts.alpinelinux.org Subject: what should be done with SA_INTERRUPT? (gpm 1.20.7) On alpine, gpm 1.20.7 doesn't build completely, so I've been poking at it. There were numerous cases of sys/select.h being omitted, but the biggest issue I've hit so far is the use of SA_INTERRUPT in a call to sigaction(); the purpose is to break out of select() without it getting restarted. musl does not define or support SA_INTERRUPT, as far as I can tell (I seem to recall that musl forces SA_RESTART). This is in src/prog/gpm-root.y, which is the source for the "gpm-root" utility. Any idea what to do about this? I could build gpm without it, but (a) I'd like to see the whole mess build, and (b) I'm not sure how to tell make that it can skip gpm-root. As a temporary fix, I'm using this patch: -#if defined(__GLIBC__) - __sigemptyset(&childaction.sa_mask); -#else /* __GLIBC__ */ - childaction.sa_mask=0; -#endif /* __GLIBC__ */ + sigemptyset(&childaction.sa_mask); +#ifdef SA_INTERRUPT childaction.sa_flags=SA_INTERRUPT; /* need to break the select() call */ +#endif Thanks, Isaac Dunham
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