'\" te
.\"  Copyright 1989 AT&T
.TH makedev 3C "29 Dec 1996" "SunOS 5.11" "Standard C Library Functions"
.SH NAME
makedev, major, minor \- manage a device number
.SH SYNOPSIS
.LP
.nf
#include <sys/types.h>
#include <sys/mkdev.h>

\fBdev_t\fR \fBmakedev\fR(\fBmajor_t\fR \fImaj\fR, \fBminor_t\fR \fImin\fR);
.fi

.LP
.nf
\fBmajor_t\fR \fBmajor\fR(\fBdev_t\fR \fIdevice\fR);
.fi

.LP
.nf
\fBminor_t\fR \fBminor\fR(\fBdev_t\fR \fIdevice\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBmakedev()\fR function returns a formatted device number on success and \fBNODEV\fR on failure.  The \fImaj\fR argument is the major number.  The \fImin\fR argument is the minor number.  The \fBmakedev()\fR function can be used to create a device number for input to \fBmknod\fR(2).
.sp
.LP
The \fBmajor()\fR function returns the major number component from \fIdevice\fR.
.sp
.LP
The \fBminor()\fR function returns the minor number component  from \fIdevice\fR.
.SH RETURN VALUES
.sp
.LP
Upon successful completion, \fBmakedev()\fR returns a formatted device number. Otherwise, \fBNODEV\fR is returned and \fBerrno\fR is set to indicate the error.
.SH ERRORS
.sp
.LP
The \fBmakedev()\fR function will fail if:
.sp
.ne 2
.mk
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 10n
.rt  
One or both of the arguments \fImaj\fR and \fImin\fR is too large, or the \fIdevice\fR number created from \fImaj\fR and \fImin\fR is \fBNODEV\fR.
.RE

.sp
.LP
The \fBmajor()\fR function will fail if:
.sp
.ne 2
.mk
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 10n
.rt  
The \fIdevice\fR argument is \fBNODEV\fR, or the major number component of \fIdevice\fR is too large.
.RE

.sp
.LP
The \fBminor()\fR function will fail if:
.sp
.ne 2
.mk
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 10n
.rt  
The \fIdevice\fR argument is \fBNODEV\fR.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
MT-LevelMT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBmknod\fR(2), \fBstat\fR(2), \fBattributes\fR(5)