[Qemu-devel] [PATCH] readconfig: add emulation of /dev/fd/ to platforms that that lacks this API

[Ronnie Sahlberg]

Please find a patch to -readconfig.

On many platforms -readconfig /dev/fd/<n> can be used to read from an already 
opened and inherited filedescriptor <n>.

On platforms that do not natively provide /dev/fd/<n> 
add emulation of this by checking if the ofiginal fopen(path) failed, then IF
the path starts with /dev/fd/ then try to read the descriptorvalue and fdopen() 
it.


It means that we can use -readconfig /dev/fd/<n> on all platforms. On those 
that provide a /dev/fd we just open that file. On those that do not we emulate 
it.


regards
ronnie sahlberg