I disagree here:
> else
> {
> + /* Detect whether /proc/self/fd/../fd exists. On Linux, that name
> + resolves to /proc/self/fd, which was opened above. However, on
> + Solaris, it may resolve to /proc/self/fd/fd, which cannot exist,
> + since all names in /proc/self/fd are numeric. */
Will be better
/* Detect whether /proc/self/fd/%i/../fd exists. Where %i is an
open fd on /proc/self/fd.
On Linux, that name
resolves to /proc/self/fd, which was opened above. However, on
Solaris, it may resolve to /proc/self/fd/fd, which cannot exist,
since all names in /proc/self/fd are numeric. */
Bastien
