1/* $NetBSD: time.c,v 1.21 2017/07/15 14:35:55 christos 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 1.21 2017/07/15 14:35:55 christos 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 *, 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, r0, r1, e, b);
142}
143#endif
144
145void
146prusage1(FILE *fp, const char *cp, struct rusage *r0, struct rusage *r1,
147 struct timespec *e, struct timespec *b)
148{
149 long i;
150 time_t t;
151 time_t ms;
152
153 ms = (e->tv_sec - b->tv_sec) * 100 + (e->tv_nsec - b->tv_nsec) / 10000000;
154 t = (r1->ru_utime.tv_sec - r0->ru_utime.tv_sec) * 100 +
155 (r1->ru_utime.tv_usec - r0->ru_utime.tv_usec) / 10000 +
156 (r1->ru_stime.tv_sec - r0->ru_stime.tv_sec) * 100 +
157 (r1->ru_stime.tv_usec - r0->ru_stime.tv_usec) / 10000;
158
159 for (; *cp; cp++)
160 if (*cp != '%')
161 (void) fputc(*cp, fp);
162 else if (cp[1])
163 switch (*++cp) {
164 case 'D': /* (average) unshared data size */
165 (void)fprintf(fp, "%ld", t == 0 ? 0L :
166 (long)((r1->ru_idrss + r1->ru_isrss -
167 (r0->ru_idrss + r0->ru_isrss)) / t));
168 break;
169 case 'E': /* elapsed (wall-clock) time */
170 pcsecs(fp, (long) ms);
171 break;
172 case 'F': /* page faults */
173 (void)fprintf(fp, "%ld", r1->ru_majflt - r0->ru_majflt);
174 break;
175 case 'I': /* FS blocks in */
176 (void)fprintf(fp, "%ld", r1->ru_inblock - r0->ru_inblock);
177 break;
178 case 'K': /* (average) total data memory used */
179 (void)fprintf(fp, "%ld", t == 0 ? 0L :
180 (long)(((r1->ru_ixrss + r1->ru_isrss + r1->ru_idrss) -
181 (r0->ru_ixrss + r0->ru_idrss + r0->ru_isrss)) / t));
182 break;
183 case 'M': /* max. Resident Set Size */
184 (void)fprintf(fp, "%ld", r1->ru_maxrss / 2L);
185 break;
186 case 'O': /* FS blocks out */
187 (void)fprintf(fp, "%ld", r1->ru_oublock - r0->ru_oublock);
188 break;
189 case 'P': /* percent time spent running */
190 /* check if it did not run at all */
191 if (ms == 0) {
192 (void)fputs("0.0%", fp);
193 } else {
194 char pb[32];
195 (void)fputs(strpct(pb, sizeof(pb),
196 (uintmax_t)t, (uintmax_t)ms, 1), fp);
197 (void)fputc('%', fp);
198 }
199 break;
200 case 'R': /* page reclaims */
201 (void)fprintf(fp, "%ld", r1->ru_minflt - r0->ru_minflt);
202 break;
203 case 'S': /* system CPU time used */
204 pdeltat(fp, &r1->ru_stime, &r0->ru_stime);
205 break;
206 case 'U': /* user CPU time used */
207 pdeltat(fp, &r1->ru_utime, &r0->ru_utime);
208 break;
209 case 'W': /* number of swaps */
210 i = r1->ru_nswap - r0->ru_nswap;
211 (void)fprintf(fp, "%ld", i);
212 break;
213 case 'X': /* (average) shared text size */
214 (void)fprintf(fp, "%ld", t == 0 ? 0L :
215 (long)((r1->ru_ixrss - r0->ru_ixrss) / t));
216 break;
217 case 'c': /* num. involuntary context switches */
218 (void)fprintf(fp, "%ld", r1->ru_nivcsw - r0->ru_nivcsw);
219 break;
220 case 'k': /* number of signals received */
221 (void)fprintf(fp, "%ld", r1->ru_nsignals-r0->ru_nsignals);
222 break;
223 case 'r': /* socket messages received */
224 (void)fprintf(fp, "%ld", r1->ru_msgrcv - r0->ru_msgrcv);
225 break;
226 case 's': /* socket messages sent */
227 (void)fprintf(fp, "%ld", r1->ru_msgsnd - r0->ru_msgsnd);
228 break;
229 case 'w': /* num. voluntary context switches (waits) */
230 (void)fprintf(fp, "%ld", r1->ru_nvcsw - r0->ru_nvcsw);
231 break;
232 }
233 (void)fputc('\n', fp);
234}
235
236static void
237pdeltat(FILE *fp, struct timeval *t1, struct timeval *t0)
238{
239 struct timeval td;
240
241 timersub(t1, t0, &td);
242 (void)fprintf(fp, "%ld.%01ld", (long)td.tv_sec,
243 (long)(td.tv_usec / 100000));
244}
245
246#define P2DIG(fp, i) (void)fprintf(fp, "%ld%ld", (i) / 10, (i) % 10)
247
248#ifndef NOT_CSH
249void
250psecs(long l)
251{
252 long i;
253
254 i = l / 3600;
255 if (i) {
256 (void)fprintf(cshout, "%ld:", i);
257 i = l % 3600;
258 P2DIG(cshout, i / 60);
259 goto minsec;
260 }
261 i = l;
262 (void)fprintf(cshout, "%ld", i / 60);
263minsec:
264 i %= 60;
265 (void)fputc(':', cshout);
266 P2DIG(cshout, i);
267}
268#endif
269
270static void
271pcsecs(FILE *fp, long l) /* PWP: print mm:ss.dd, l is in sec*100 */
272{
273 long i;
274
275 i = l / 360000;
276 if (i) {
277 (void)fprintf(fp, "%ld:", i);
278 i = (l % 360000) / 100;
279 P2DIG(fp, i / 60);
280 goto minsec;
281 }
282 i = l / 100;
283 (void)fprintf(fp, "%ld", i / 60);
284minsec:
285 i %= 60;
286 (void)fputc(':', fp);
287 P2DIG(fp, i);
288 (void)fputc('.', fp);
289 P2DIG(fp, (l % 100));
290}
291