GETDEVMAJOR(3) BSD Library Functions Manual GETDEVMAJOR(3)
NAME
getdevmajor -- get block or character device major number
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdlib.h>
#include <sys/stat.h>
devmajor_t
getdevmajor(const char *name, mode_t type);
DESCRIPTION
The getdevmajor() function returns the major device number of the block or character device specified by name and a file type matching the
one encoded in type which must be one of S_IFBLK or S_IFCHR.
RETURN VALUES
If no device matches the specified values, no information is available, or an error occurs, NODEVMAJOR is returned and errno is set to indi-
cate the error.
EXAMPLES
To retrieve the major number for pty(4) slave devices (aka pts devices):
#include <stdlib.h>
#include <sys/stat.h>
devmajor_t pts;
pts = getdevmajor("pts", S_IFCHR);
To retrieve the major numbers for the block and character wd(4) devices:
#include <stdlib.h>
#include <sys/stat.h>
devmajor_t c, b;
c = getdevmajor("wd", S_IFCHR);
b = getdevmajor("wd", S_IFBLK);
ERRORS
The getdevmajor() function may fail and set errno for any of the errors specified for the library functions malloc(3) and sysctlbyname(3).
In addition, the following errors may be reported:
[EINVAL] The value of the type argument is not S_IFCHR or S_IFBLK.
[ENOENT] The named device is not found.
SEE ALSO
stat(2), devname(3), malloc(3), sysctlbyname(3)
HISTORY
The getdevmajor() function call appeared in NetBSD 3.0.
BSD
January 20, 2009 BSD
