DEVNAME(3) | Library Functions Manual | DEVNAME(3) |
devname
, devname_r
— get device name
Standard C Library (libc, -lc)
#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);
The
devname
()
function returns a pointer to the name of the block or character device in
“/dev” with a device number of
dev, and a file type matching the one encoded in
type which must be one of
S_IFBLK
or S_IFCHR
. If no
device matches the specified values, or no information is available, NULL is
returned.
The
devname
()
function uses a static buffer, which will be overwritten on subsequent
calls. The
devname_r
()
functions takes a buffer and length as arguments to avoid this problem.
The traditional display for applications when no device is found is the string “??”.
The devname
() function call appeared in
4.4BSD.
October 25, 2004 | macOS 14.6 |