- /* 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. */
+ /* Detect whether /proc/self/fd/%i/../fd exists, where %i is the
+ number of a file descriptor open 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. */