Re: [PATCHv10 man-pages 5/5] execveat.2: initial man page for execveat(2)

[Al Viro <viro@ZenIV.linux.org.uk>]

On Fri, Jan 09, 2015 at 03:48:15PM -0500, Rich Felker wrote:
> I think this is a case that needs to be fixed, though it's hard. The
> normal correct usage for fexecve is to always pass an O_CLOEXEC file
> descriptor, and the caller can't really be expected to know whether
> the file is a script or not. We discussed workarounds before and one
> idea I proposed was having fexecve provide a "one open only" magic
> symlink in /proc/self/ to pass to the interpreter. It would behave
> like an O_PATH file descriptor magic symlink in /proc/self/fd, but
> would automatically cease to exist on the first open (at which point
> the interpreter would have a real O_RDONLY file descriptor for the
> underlying file).

For fsck sake, folks, if you have bloody /proc, you don't need that shite
at all!  Just do execve on /proc/self/fd/n, and be done with that.

The sole excuse for merging that thing in the first place had been
"would anybody think of children^Wsclerotic^Whardened environments
where they have no /proc at all".

Sheesh...