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
35 static 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 */
52 static void pdeltat(FILE *, int, struct timeval *, struct timeval *);
53 static void pcsecs(FILE *, long);
54
55 #ifndef NOT_CSH
56 void
settimes(void)57 settimes(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 */
71 void
72 /*ARGSUSED*/
dotime(Char ** v,struct command * t)73 dotime(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 */
88 void
89 /*ARGSUSED*/
donice(Char ** v,struct command * t)90 donice(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
105 void
ruadd(struct rusage * ru,struct rusage * ru2)106 ruadd(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
128 void
prusage(FILE * fp,struct rusage * r0,struct rusage * r1,struct timespec * e,struct timespec * b)129 prusage(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
145 void
prusage1(FILE * fp,const char * cp,int prec,struct rusage * r0,struct rusage * r1,struct timespec * e,struct timespec * b)146 prusage1(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
237 static void
pdeltat(FILE * fp,int prec,struct timeval * t1,struct timeval * t0)238 pdeltat(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
250 void
psecs(long l)251 psecs(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);
264 minsec:
265 i %= 60;
266 (void)fputc(':', cshout);
267 P2DIG(cshout, i);
268 }
269 #endif
270
271 static void
pcsecs(FILE * fp,long l)272 pcsecs(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);
285 minsec:
286 i %= 60;
287 (void)fputc(':', fp);
288 P2DIG(fp, i);
289 (void)fputc('.', fp);
290 P2DIG(fp, (l % 100));
291 }
292