1/* $NetBSD: time.c,v 1.23 2020/10/17 08:46:02 mlelstv Exp $ */
2
3/*-
4 * Copyright (c) 1980, 1991, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34#if 0
35static char sccsid[] = "@(#)time.c	8.1 (Berkeley) 5/31/93";
36#else
37__RCSID("$NetBSD: time.c,v 1.23 2020/10/17 08:46:02 mlelstv Exp $");
38#endif
39#endif /* not lint */
40
41#ifndef NOT_CSH
42#include <sys/types.h>
43#include <stdarg.h>
44#include "csh.h"
45#include "extern.h"
46#endif
47#include <util.h>
48
49/*
50 * C Shell - routines handling process timing and niceing
51 */
52static void pdeltat(FILE *, int, struct timeval *, struct timeval *);
53static void pcsecs(FILE *, long);
54
55#ifndef NOT_CSH
56void
57settimes(void)
58{
59    struct rusage ruch;
60
61    (void)clock_gettime(CLOCK_MONOTONIC, &time0);
62    (void)getrusage(RUSAGE_SELF, &ru0);
63    (void)getrusage(RUSAGE_CHILDREN, &ruch);
64    ruadd(&ru0, &ruch);
65}
66
67/*
68 * dotime is only called if it is truly a builtin function and not a
69 * prefix to another command
70 */
71void
72/*ARGSUSED*/
73dotime(Char **v, struct command *t)
74{
75    struct rusage ru1, ruch;
76    struct timespec timedol;
77
78    (void)getrusage(RUSAGE_SELF, &ru1);
79    (void)getrusage(RUSAGE_CHILDREN, &ruch);
80    ruadd(&ru1, &ruch);
81    (void)clock_gettime(CLOCK_MONOTONIC, &timedol);
82    prusage(cshout, &ru0, &ru1, &timedol, &time0);
83}
84
85/*
86 * donice is only called when it on the line by itself or with a +- value
87 */
88void
89/*ARGSUSED*/
90donice(Char **v, struct command *t)
91{
92    Char *cp;
93    int nval;
94
95    nval = 0;
96    v++;
97    cp = *v++;
98    if (cp == 0)
99	nval = 4;
100    else if (*v == 0 && any("+-", cp[0]))
101	nval = getn(cp);
102    (void)setpriority(PRIO_PROCESS, 0, nval);
103}
104
105void
106ruadd(struct rusage *ru, struct rusage *ru2)
107{
108    timeradd(&ru->ru_utime, &ru2->ru_utime, &ru->ru_utime);
109    timeradd(&ru->ru_stime, &ru2->ru_stime, &ru->ru_stime);
110    if (ru2->ru_maxrss > ru->ru_maxrss)
111	ru->ru_maxrss = ru2->ru_maxrss;
112
113    ru->ru_ixrss += ru2->ru_ixrss;
114    ru->ru_idrss += ru2->ru_idrss;
115    ru->ru_isrss += ru2->ru_isrss;
116    ru->ru_minflt += ru2->ru_minflt;
117    ru->ru_majflt += ru2->ru_majflt;
118    ru->ru_nswap += ru2->ru_nswap;
119    ru->ru_inblock += ru2->ru_inblock;
120    ru->ru_oublock += ru2->ru_oublock;
121    ru->ru_msgsnd += ru2->ru_msgsnd;
122    ru->ru_msgrcv += ru2->ru_msgrcv;
123    ru->ru_nsignals += ru2->ru_nsignals;
124    ru->ru_nvcsw += ru2->ru_nvcsw;
125    ru->ru_nivcsw += ru2->ru_nivcsw;
126}
127
128void
129prusage(FILE *fp, struct rusage *r0, struct rusage *r1, struct timespec *e,
130        struct timespec *b)
131{
132    struct varent *vp;
133    const char *cp;
134
135    vp = adrof(STRtime);
136
137    if (vp && vp->vec[0] && vp->vec[1])
138	cp = short2str(vp->vec[1]);
139    else
140	cp = "%Uu %Ss %E %P %X+%Dk %I+%Oio %Fpf+%Ww";
141    prusage1(fp, cp, 1, r0, r1, e, b);
142}
143#endif
144
145void
146prusage1(FILE *fp, const char *cp, int prec,
147    struct rusage *r0, struct rusage *r1,
148    struct timespec *e, struct timespec *b)
149{
150    long i;
151    time_t t;
152    time_t ms;
153
154    ms = (e->tv_sec - b->tv_sec) * 100 + (e->tv_nsec - b->tv_nsec) / 10000000;
155    t = (r1->ru_utime.tv_sec - r0->ru_utime.tv_sec) * 100 +
156        (r1->ru_utime.tv_usec - r0->ru_utime.tv_usec) / 10000 +
157        (r1->ru_stime.tv_sec - r0->ru_stime.tv_sec) * 100 +
158        (r1->ru_stime.tv_usec - r0->ru_stime.tv_usec) / 10000;
159
160    for (; *cp; cp++)
161	if (*cp != '%')
162	    (void) fputc(*cp, fp);
163	else if (cp[1])
164	    switch (*++cp) {
165	    case 'D':		/* (average) unshared data size */
166		(void)fprintf(fp, "%ld", t == 0 ? 0L :
167			(long)((r1->ru_idrss + r1->ru_isrss -
168			 (r0->ru_idrss + r0->ru_isrss)) / t));
169		break;
170	    case 'E':		/* elapsed (wall-clock) time */
171		pcsecs(fp, (long) ms);
172		break;
173	    case 'F':		/* page faults */
174		(void)fprintf(fp, "%ld", r1->ru_majflt - r0->ru_majflt);
175		break;
176	    case 'I':		/* FS blocks in */
177		(void)fprintf(fp, "%ld", r1->ru_inblock - r0->ru_inblock);
178		break;
179	    case 'K':		/* (average) total data memory used  */
180		(void)fprintf(fp, "%ld", t == 0 ? 0L :
181			(long)(((r1->ru_ixrss + r1->ru_isrss + r1->ru_idrss) -
182			 (r0->ru_ixrss + r0->ru_idrss + r0->ru_isrss)) / t));
183		break;
184	    case 'M':		/* max. Resident Set Size */
185		(void)fprintf(fp, "%ld", r1->ru_maxrss);
186		break;
187	    case 'O':		/* FS blocks out */
188		(void)fprintf(fp, "%ld", r1->ru_oublock - r0->ru_oublock);
189		break;
190	    case 'P':		/* percent time spent running */
191		/* check if it did not run at all */
192		if (ms == 0) {
193			(void)fputs("0.0%", fp);
194		} else {
195			char pb[32];
196			(void)fputs(strpct(pb, sizeof(pb),
197			    (uintmax_t)t, (uintmax_t)ms, 1), fp);
198			(void)fputc('%', fp);
199		}
200		break;
201	    case 'R':		/* page reclaims */
202		(void)fprintf(fp, "%ld", r1->ru_minflt - r0->ru_minflt);
203		break;
204	    case 'S':		/* system CPU time used */
205		pdeltat(fp, prec, &r1->ru_stime, &r0->ru_stime);
206		break;
207	    case 'U':		/* user CPU time used */
208		pdeltat(fp, prec, &r1->ru_utime, &r0->ru_utime);
209		break;
210	    case 'W':		/* number of swaps */
211		i = r1->ru_nswap - r0->ru_nswap;
212		(void)fprintf(fp, "%ld", i);
213		break;
214	    case 'X':		/* (average) shared text size */
215		(void)fprintf(fp, "%ld", t == 0 ? 0L :
216			       (long)((r1->ru_ixrss - r0->ru_ixrss) / t));
217		break;
218	    case 'c':		/* num. involuntary context switches */
219		(void)fprintf(fp, "%ld", r1->ru_nivcsw - r0->ru_nivcsw);
220		break;
221	    case 'k':		/* number of signals received */
222		(void)fprintf(fp, "%ld", r1->ru_nsignals-r0->ru_nsignals);
223		break;
224	    case 'r':		/* socket messages received */
225		(void)fprintf(fp, "%ld", r1->ru_msgrcv - r0->ru_msgrcv);
226		break;
227	    case 's':		/* socket messages sent */
228		(void)fprintf(fp, "%ld", r1->ru_msgsnd - r0->ru_msgsnd);
229		break;
230	    case 'w':		/* num. voluntary context switches (waits) */
231		(void)fprintf(fp, "%ld", r1->ru_nvcsw - r0->ru_nvcsw);
232		break;
233	    }
234    (void)fputc('\n', fp);
235}
236
237static void
238pdeltat(FILE *fp, int prec, struct timeval *t1, struct timeval *t0)
239{
240    struct timeval td;
241
242    timersub(t1, t0, &td);
243    (void)fprintf(fp, "%ld.%0*ld", (long)td.tv_sec,
244	prec, (long)(td.tv_usec / 100000));
245}
246
247#define  P2DIG(fp, i) (void)fprintf(fp, "%ld%ld", (i) / 10, (i) % 10)
248
249#ifndef NOT_CSH
250void
251psecs(long l)
252{
253    long i;
254
255    i = l / 3600;
256    if (i) {
257	(void)fprintf(cshout, "%ld:", i);
258	i = l % 3600;
259	P2DIG(cshout, i / 60);
260	goto minsec;
261    }
262    i = l;
263    (void)fprintf(cshout, "%ld", i / 60);
264minsec:
265    i %= 60;
266    (void)fputc(':', cshout);
267    P2DIG(cshout, i);
268}
269#endif
270
271static void
272pcsecs(FILE *fp, long l)	/* PWP: print mm:ss.dd, l is in sec*100 */
273{
274    long i;
275
276    i = l / 360000;
277    if (i) {
278	(void)fprintf(fp, "%ld:", i);
279	i = (l % 360000) / 100;
280	P2DIG(fp, i / 60);
281	goto minsec;
282    }
283    i = l / 100;
284    (void)fprintf(fp, "%ld", i / 60);
285minsec:
286    i %= 60;
287    (void)fputc(':', fp);
288    P2DIG(fp, i);
289    (void)fputc('.', fp);
290    P2DIG(fp, (l % 100));
291}
292