Re: [Libvir] take 2 [Re: write(2) may write less than the total requested

2008-02-20 Thread Jim Paris
Jim Meyering wrote: > It *could* perform that test, but I think it is slightly more > maintainable (no duplication of that potentially nontrivial expression) > and just as correct to check only "ret < 0". Not having the duplicated expression is certainly good, if it's correct to do so (and it seem

Re: [Libvir] take 2 [Re: write(2) may write less than the total requested

2008-02-20 Thread Jim Meyering
Jim Paris <[EMAIL PROTECTED]> wrote: > Jim Meyering wrote: ... Hi Jim, >> -retry: >> -ret = write(pollInfos[nr].fd, (char *) req, req->len); >> +ret = safewrite(pollInfos[nr].fd, (char *) req, req->len); >> if (ret < 0) { > > Should this check (ret == req->len) instead? safewrite()

Re: [Libvir] take 2 [Re: write(2) may write less than the total requested

2008-02-20 Thread Jim Paris
Hi Jim, comments inline Jim Meyering wrote: > diff --git a/proxy/libvirt_proxy.c b/proxy/libvirt_proxy.c > index d96d3db..a22ba6c 100644 > --- a/proxy/libvirt_proxy.c > +++ b/proxy/libvirt_proxy.c > @@ -2,7 +2,7 @@ > * proxy_svr.c: root suid proxy server for Xen access to APIs with no > *

Re: [Libvir] take 2 [Re: write(2) may write less than the total requested

2008-02-20 Thread Jim Meyering
Mark McLoughlin <[EMAIL PROTECTED]> wrote: > On Wed, 2008-02-20 at 16:42 +0100, Jim Meyering wrote: > >> If I do as you suggest and move the safewrite definition into util.h, >> and make it static inline, then both problems go away. > > Make sure to try and build this with gcc-4.3.0 - remembe

Re: [Libvir] take 2 [Re: write(2) may write less than the total requested

2008-02-20 Thread Mark McLoughlin
On Wed, 2008-02-20 at 16:42 +0100, Jim Meyering wrote: > If I do as you suggest and move the safewrite definition into util.h, > and make it static inline, then both problems go away. Make sure to try and build this with gcc-4.3.0 - remember that we un-inlined xstrtol() because of: int

[Libvir] take 2 [Re: write(2) may write less than the total requested

2008-02-20 Thread Jim Meyering
Daniel Veillard <[EMAIL PROTECTED]> wrote: > On Wed, Feb 20, 2008 at 02:53:49PM +0100, Jim Meyering wrote: >> Use safewrite in place of write, in many cases. >> And add "make syntax-check" rules to ensure no new uses sneak in. >> >> There are many uses of write like this: >> >> if (write (fd,