fdevname man page on FreeBSD

Man page or keyword search:  
man Server   9747 pages
apropos Keyword Search (all sections)
Output format
FreeBSD logo
[printable version]

DEVNAME(3)		 BSD Library Functions Manual		    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);

     char *
     fdevname(int fd);

     char *
     fdevname_r(int fd, 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.

     The fdevname() and fdevname_r() function obtains the device name directly
     from a file descriptor pointing to a character device.  If it is unable
     to come up with a suitable name, these functions will return a NULL
     pointer.

     devname() and fdevname() return the name stored in a static buffer which
     will be overwritten on subsequent calls.  devname_r() and fdevname_r()
     take 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));
	     printf("fdevname is /dev/%s\n", fdevname(fd));

SEE ALSO
     stat(2)

HISTORY
     The devname() function appeared in 4.4BSD.	 The fdevname() function
     appeared in FreeBSD 8.0.

BSD			       February 22, 2005			   BSD
[top]

List of man pages available for FreeBSD

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
...................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net