Date: Thu, 9 May 1996 23:14:48 +0200 (SAT) From: Robert Nordier <rnordier@iafrica.com> To: hackers@freebsd.org Subject: [Q] Raw interface to block devices Message-ID: <199605092114.XAA02591@eac.iafrica.com>
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I have a function
int process(const char *fs);
which expects 'fs' to refer to a device which may hold a filesystem.
The function actually works with the raw device, but allows the
user some flexibility. Eg:
process("/dev/rfd0"); or
process("/dev/fd0");
An obvious, though clumsy, approach is:
stat()
if {S_IFCHR, S_IFBLK}
derive the other name by deleting/inserting an 'r' somewhere
stat()
check for (reversed) {S_IFCHR, S_IFBLK}
This tries to ensure we are not dealing with (say) '/dev/tty'; and
to come up with the device name needed.
However, something like
ln -s /dev/fd0 floppy
causes problems.
There must be a better way to do this. The stuff I've looked at
either trustingly waits forever on '/dev/tty', or refuses to even
consider 'floppy'.
Surely a library function is needed (or already exists).
--
Robert Nordier
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