Re: [gentoo-portage-dev] [PATCH] econf: update configure/config.{sub,guess} atomically to avoid races

[Alec Warner]

On Tue, Dec 17, 2013 at 6:53 PM, Greg Turner <gmt@×××××.us> wrote:

> On Tue, Dec 17, 2013 at 5:58 PM, Alec Warner <antarus@g.o> wrote:
> > Sed is already atomic
> >
> > antarus@goats5 /tmp/test $ cat foo
> > Debian Rocks!
> > antarus@goats5 /tmp/test $ strace -e trace=file sed -i -e
> > 's/Debian/Gentoo/g' foo
> [snip]
> > open("foo", O_RDONLY)                   = 3
> > open("/proc/filesystems", O_RDONLY)     = 4
> > open("./sedfDxBxl", O_RDWR|O_CREAT|O_EXCL, 0600) = 4
> > rename("./sedfDxBxl", "foo")            = 0
>
> Nice demonstration!  Been wondering about that...
>

I originally opened the source code and tried to find the actual rename
code...but gave up after about 2 minutes figuring strace would be quicker.
I was right ;)

-A


>
> -gmt
>
>