xref: /freebsd/usr.bin/ktrace/subr.c (revision c601ad8eebac3f9bc517d75ecab772aae70aeec6)
1 /*-
2  * Copyright (c) 1988, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 4. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29 
30 #if 0
31 #ifndef lint
32 static char sccsid[] = "@(#)subr.c	8.1 (Berkeley) 6/6/93";
33 #endif /* not lint */
34 #endif
35 
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
38 
39 #include <sys/param.h>
40 #include <sys/file.h>
41 #include <sys/proc.h>
42 #include <sys/time.h>
43 #include <sys/uio.h>
44 #include <sys/ktrace.h>
45 
46 #include <stdio.h>
47 
48 #include "ktrace.h"
49 
50 void timevaladd(struct timeval *, struct timeval *);
51 void timevalsub(struct timeval *, struct timeval *);
52 void timevalfix(struct timeval *);
53 
54 int
55 getpoints(char *s)
56 {
57 	int facs = 0;
58 
59 	while (*s) {
60 		switch(*s) {
61 		case 'c':
62 			facs |= KTRFAC_SYSCALL | KTRFAC_SYSRET;
63 			break;
64 		case 'i':
65 			facs |= KTRFAC_GENIO;
66 			break;
67 		case 'n':
68 			facs |= KTRFAC_NAMEI;
69 			break;
70 		case 'p':
71 			facs |= KTRFAC_CAPFAIL;
72 			break;
73 		case 's':
74 			facs |= KTRFAC_PSIG;
75 			break;
76 		case 't':
77 			facs |= KTRFAC_STRUCT;
78 			break;
79 		case 'u':
80 			facs |= KTRFAC_USER;
81 			break;
82 		case 'w':
83 			facs |= KTRFAC_CSW;
84 			break;
85 		case 'y':
86 			facs |= KTRFAC_SYSCTL;
87 			break;
88 		case '+':
89 			facs |= DEF_POINTS;
90 			break;
91 		default:
92 			return (-1);
93 		}
94 		s++;
95 	}
96 	return (facs);
97 }
98 
99 void
100 timevaladd(struct timeval *t1, struct timeval *t2)
101 {
102 	t1->tv_sec += t2->tv_sec;
103 	t1->tv_usec += t2->tv_usec;
104 	timevalfix(t1);
105 }
106 
107 void
108 timevalsub(struct timeval *t1, struct timeval *t2)
109 {
110 	t1->tv_sec -= t2->tv_sec;
111 	t1->tv_usec -= t2->tv_usec;
112 	timevalfix(t1);
113 }
114 
115 void
116 timevalfix(struct timeval *t1)
117 {
118 	if (t1->tv_usec < 0) {
119 		t1->tv_sec--;
120 		t1->tv_usec += 1000000;
121 	}
122 	if (t1->tv_usec >= 1000000) {
123 		t1->tv_sec++;
124 		t1->tv_usec -= 1000000;
125 	}
126 }
127