src/lib/libc/gen/fdevname.c, branch releng/9.1 FreeBSD source tree Remove (hidden) warning about missing prototypes for fdevname(3). 2009-12-05T18:51:44+00:00 Ed Schouten ed@FreeBSD.org 2009-12-05T18:51:44+00:00 86b6b655e423bbf0494fcb67658043163aba17e8 






Add two new routines: fdevname() and fdevname_r().
2009-02-11T20:24:59+00:00

Ed Schouten
ed@FreeBSD.org

2009-02-11T20:24:59+00:00

26d4f5e969a5850cbb0b2344835d515c368d5652

A more elegant way of obtaining a name of a character device by its file
descriptor on FreeBSD, is to use the FIODGNAME ioctl. Because a valid
file descriptor implies a file descriptor is visible in /dev, it will
always resolve a valid device name.

I'm adding a more friendly wrapper for this ioctl, called fdevname(). It
is a lot easier to use than devname() and also has better error
handling. When a device name cannot be resolved, it will just return
NULL instead of a generated device name that makes no sense.

Discussed with:	kib





A more elegant way of obtaining a name of a character device by its file
descriptor on FreeBSD, is to use the FIODGNAME ioctl. Because a valid
file descriptor implies a file descriptor is visible in /dev, it will
always resolve a valid device name.

I'm adding a more friendly wrapper for this ioctl, called fdevname(). It
is a lot easier to use than devname() and also has better error
handling. When a device name cannot be resolved, it will just return
NULL instead of a generated device name that makes no sense.

Discussed with:	kib