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DEVNAME (3) | C library functions | Unix Manual Pages | :man

NAME

devname - "get device name"

CONTENTS

Library
Synopsis
Description
Examples
See Also
History

LIBRARY


.Lb libc

SYNOPSIS


.In sys/stat.h
.In 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 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));

SEE ALSO

stat(2)

HISTORY


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