01-31-2018
Quote:
So whilst there's no doubt that Linux is the de facto winner of the UNIX-a-like OS wars, and ultimately almost all new deployments taking place will be on Linux and not the BSDs or any proprietary UNIX, the other survivors will continue to do quite nicely in their own little niches for a long time to come, I think.
little niches, thats the point. OK Solaris will run some legacy code for a while, and I guess some managers still remember the happy days at a VAX running encumbered BSD. However they are already old and all the BSD heroes like McKusick, Bostic, etc.. are even older too. BSD without them?
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IOCTL(2) BSD System Calls Manual IOCTL(2)
NAME
ioctl -- control device
SYNOPSIS
#include <sys/ioctl.h>
int
ioctl(int fildes, unsigned long request, ...);
DESCRIPTION
The ioctl() function manipulates the underlying device parameters of special files. In particular, many operating characteristics of charac-
ter special files (e.g. terminals) may be controlled with ioctl() requests. The argument fildes must be an open file descriptor.
An ioctl request has encoded in it whether the argument is an ``in'' parameter or ``out'' parameter, and the size of the argument argp in
bytes. Macros and defines used in specifying an ioctl request are located in the file <sys/ioctl.h>.
RETURN VALUES
If an error has occurred, a value of -1 is returned and errno is set to indicate the error.
ERRORS
ioctl() will fail if:
[EBADF] fildes is not a valid descriptor.
[EINVAL] Request or argp is not valid.
[ENOTTY] fildes is not associated with a character special device.
[ENOTTY] The specified request does not apply to the kind of object that the descriptor fildes references.
SEE ALSO
cdio(1), chio(1), mt(1), execve(2), fcntl(2), intro(4), tty(4)
HISTORY
An ioctl() function call appeared in Version 7 AT&T UNIX.
4th Berkeley Distribution December 11, 1993 4th Berkeley Distribution