summaryrefslogtreecommitdiffstats
path: root/usr.sbin/xntpd/include/sys/clkdefs.h
blob: afbc77a8f1ac4321ef0cd0acf06e46e24dc4dc41 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
/*
 * Defines for the "clk" timestamping STREAMS module
 */

#if defined(sun)
#include <sys/ioccom.h>
#else
#include <sys/ioctl.h>
#endif

/*
 * First, we need to define the maximum size of the set of
 * characters to timestamp. 32 is MORE than enough.
 */

#define CLK_MAXSTRSIZE 32
struct clk_tstamp_charset {		/* XXX to use _IOW not _IOWN */
	char	val[CLK_MAXSTRSIZE];
};

/*
 * ioctl(fd, CLK_SETSTR, (char*)c );
 *
 * will tell the driver that any char in the null-terminated
 * string c should be timestamped. It is possible, though
 * unlikely that this ioctl number could collide with an
 * existing one on your system. If so, change the 'K'
 * to some other letter. However, once you've compiled
 * the kernel with this include file, you should NOT
 * change this file.
 */

#if defined(__STDC__)			/* XXX avoid __STDC__=0 on SOLARIS */
#define CLK_SETSTR _IOW('K', 01, struct clk_tstamp_charset)
#else
#define CLK_SETSTR _IOW(K, 01, struct clk_tstamp_charset)
#endif

OpenPOWER on IntegriCloud