1makedev(3C)              Standard C Library Functions              makedev(3C)
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NAME

6       makedev, major, minor - manage a device number
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SYNOPSIS

9       #include <sys/types.h>
10       #include <sys/mkdev.h>
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12       dev_t makedev(major_t maj, minor_t min);
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15       major_t major(dev_t device);
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18       minor_t minor(dev_t device);
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DESCRIPTION

22       The makedev() function returns a formatted device number on success and
23       NODEV on failure.  The maj argument is the major number.  The min argu‐
24       ment is the minor number.  The makedev() function can be used to create
25       a device number for input to mknod(2).
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28       The major() function returns the major number component from device.
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31       The minor() function returns the minor number component  from device.
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RETURN VALUES

34       Upon successful completion, makedev() returns a formatted  device  num‐
35       ber.  Otherwise,  NODEV  is  returned  and errno is set to indicate the
36       error.
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ERRORS

39       The makedev() function will fail if:
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41       EINVAL    One or both of the arguments maj and min is too large, or the
42                 device number created from maj and min is NODEV.
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46       The major() function will fail if:
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48       EINVAL    The  device  argument is NODEV, or the major number component
49                 of device is too large.
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53       The minor() function will fail if:
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55       EINVAL    The device argument is NODEV.
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ATTRIBUTES

59       See attributes(5) for descriptions of the following attributes:
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64       ┌─────────────────────────────┬─────────────────────────────┐
65       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
66       ├─────────────────────────────┼─────────────────────────────┤
67       │MT-Level                     │MT-Safe                      │
68       └─────────────────────────────┴─────────────────────────────┘
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SEE ALSO

71       mknod(2), stat(2), attributes(5)
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75SunOS 5.11                        29 Dec 1996                      makedev(3C)
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