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devname(3)

NAME

     devname -- get device name

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #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 dev, and a file type
     matching the one encoded in 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 dev and type in a human-readable format.

     devname() returns the name stored in a static buffer which will be over-
     written 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));

SEE ALSO

     stat(2)

HISTORY

     The devname() function appeared in 4.4BSD.

FreeBSD 5.4		       February 22, 2005		   FreeBSD 5.4

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