#include <sys/stat.h>
#include <stdlib.h> char *
devname (dev_t dev mode_t type); char *
devname_r (dev_t dev mode_t type char *buf int len);
DESCRIPTION
The
devname ();
function returns a pointer to the name of the block or character
device in
/dev
with a device number of
Fa dev ,
and a file type matching the one encoded in
Fa type
which must be one of
S_IFBLK
or
S_IFCHR
To find the right name,
devname ();
asks the kernel via the
kern.devname
sysctl.
If it is unable to come up with a suitable name,
it will format the information encapsulated in
Fa dev
and
Fa type
in a human-readable format.
devname ();
returns the name stored in a static buffer which will be overwritten
on subsequent calls.
devname_r ();
takes a buffer and length as argument to avoid this problem.
EXAMPLES
int fd;
struct stat buf;
char *name;
fd = open("/dev/tun");
fstat(fd, &buf);
printf("devname is /dev/%s\n", devname(buf.st_rdev, S_IFCHR));
