xref: /illumos-gate/usr/src/cmd/csh/sh.time.c (revision 258f91c6)
1 /*
2  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
3  * Use is subject to license terms.
4  */
5 
6 /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
7 /*	  All Rights Reserved  	*/
8 
9 /*
10  * Copyright (c) 1980 Regents of the University of California.
11  * All rights reserved. The Berkeley Software License Agreement
12  * specifies the terms and conditions for redistribution.
13  */
14 
15 #include "sh.h"
16 #include "sh.tconst.h"
17 
18 struct timeval	time0;
19 static struct rusage ru0;
20 
21 void ruadd(struct rusage *ru, struct rusage *ru2);
22 void prusage(struct rusage *r0, struct rusage *r1, struct timeval *e,
23 	struct timeval *b);
24 void pdeltat(struct timeval *t1, struct timeval *t0);
25 void tvadd(struct timeval *tsum, struct timeval *t0);
26 void tvsub(struct timeval *tdiff, struct timeval *t1, struct timeval *t0);
27 
28 /*
29  * C Shell - routines handling process timing and niceing
30  */
31 
32 void
settimes(void)33 settimes(void)
34 {
35 	struct rusage ruch;
36 
37 #ifdef TRACE
38 	tprintf("TRACE- settimes()\n");
39 #endif
40 	(void) gettimeofday(&time0, (struct timezone *)0);
41 	(void) getrusage(RUSAGE_SELF, &ru0);
42 	(void) getrusage(RUSAGE_CHILDREN, &ruch);
43 	ruadd(&ru0, &ruch);
44 }
45 
46 /*
47  * dotime is only called if it is truly a builtin function and not a
48  * prefix to another command
49  */
50 void
dotime(void)51 dotime(void)
52 {
53 	struct timeval timedol;
54 	struct rusage ru1, ruch;
55 
56 #ifdef TRACE
57 	tprintf("TRACE- dotime()\n");
58 #endif
59 	(void) getrusage(RUSAGE_SELF, &ru1);
60 	(void) getrusage(RUSAGE_CHILDREN, &ruch);
61 	ruadd(&ru1, &ruch);
62 	(void) gettimeofday(&timedol, (struct timezone *)0);
63 	prusage(&ru0, &ru1, &timedol, &time0);
64 }
65 
66 /*
67  * donice is only called when it's on the line by itself or with a +- value
68  */
69 void
donice(tchar ** v)70 donice(tchar **v)
71 {
72 	tchar *cp;
73 	int nval;
74 
75 #ifdef TRACE
76 	tprintf("TRACE- donice()\n");
77 #endif
78 	v++;
79 	cp = *v++;
80 	if (cp == 0) {
81 		nval = 4;
82 	} else if (*v == 0 && (cp[0] == '+' || cp[0] == '-')) {
83 		nval = getn(cp);
84 	}
85 	(void) setpriority(PRIO_PROCESS, 0, nval);
86 }
87 
88 void
ruadd(struct rusage * ru,struct rusage * ru2)89 ruadd(struct rusage *ru, struct rusage *ru2)
90 {
91 	long *lp, *lp2;
92 	int cnt;
93 	/*
94 	 * The SunOS 4.x <sys/rusage.h> has ru_first and ru_last #defines
95 	 * as below.
96 	 * The SVR4/POSIX <sys/resource.h> does not have these defined for
97 	 * struct rusage
98 	 * The #defines below are here so that the original csh logic
99 	 * for ruadd remains clear now that there is no longer a private copy
100 	 * of the old <sys/resource.h>
101 	 */
102 #define	ru_first ru_ixrss
103 #define	ru_last ru_nivcsw
104 
105 #ifdef TRACE
106 	tprintf("TRACE- ruadd()\n");
107 #endif
108 	tvadd(&ru->ru_utime, &ru2->ru_utime);
109 	tvadd(&ru->ru_stime, &ru2->ru_stime);
110 	if (ru2->ru_maxrss > ru->ru_maxrss) {
111 		ru->ru_maxrss = ru2->ru_maxrss;
112 	}
113 	cnt = &ru->ru_last - &ru->ru_first + 1;
114 	lp = &ru->ru_first;
115 	lp2 = &ru2->ru_first;
116 	do {
117 		*lp++ += *lp2++;
118 	} while (--cnt > 0);
119 }
120 
121 void
prusage(struct rusage * r0,struct rusage * r1,struct timeval * e,struct timeval * b)122 prusage(struct rusage *r0, struct rusage *r1, struct timeval *e,
123 	struct timeval *b)
124 {
125 #define	pgtok(p)	((p * pgsize) / 1024)
126 	static int	pgsize;
127 
128 	time_t t =
129 	    (r1->ru_utime.tv_sec - r0->ru_utime.tv_sec) * 100 +
130 	    (r1->ru_utime.tv_usec - r0->ru_utime.tv_usec) / 10000 +
131 	    (r1->ru_stime.tv_sec - r0->ru_stime.tv_sec) * 100 +
132 	    (r1->ru_stime.tv_usec - r0->ru_stime.tv_usec) / 10000;
133 	tchar *cp;
134 	int i;
135 	struct varent *vp = adrof(S_time);
136 	int ms =
137 	    (e->tv_sec - b->tv_sec) * 100 + (e->tv_usec - b->tv_usec) / 10000;
138 
139 #ifdef TRACE
140 	tprintf("TRACE- prusage()\n");
141 #endif
142 	if (pgsize == 0) {
143 		pgsize = getpagesize();
144 	}
145 
146 	cp = S_USAGEFORMAT;	/* "%Uu %Ss %E %P %X+%Dk %I+%Oio %Fpf+%Ww" */
147 	if (vp && vp->vec[0] && vp->vec[1]) {
148 		cp = vp->vec[1];
149 	}
150 	for (; *cp; cp++) {
151 		if (*cp != '%') {
152 			Putchar(*cp);
153 		} else if (cp[1]) {
154 			switch (*++cp) {
155 
156 			case 'U':
157 				pdeltat(&r1->ru_utime, &r0->ru_utime);
158 				break;
159 
160 			case 'S':
161 				pdeltat(&r1->ru_stime, &r0->ru_stime);
162 				break;
163 
164 			case 'E':
165 				psecs_int(ms / 100);
166 				break;
167 
168 			case 'P':
169 				printf("%d%%", (int)(t * 100 /
170 				    ((ms ? ms : 1))));
171 				break;
172 
173 			case 'W':
174 				i = r1->ru_nswap - r0->ru_nswap;
175 				printf("%d", i);
176 				break;
177 
178 			case 'X':
179 				printf("%d", t == 0 ? 0 :
180 				    pgtok((r1->ru_ixrss - r0->ru_ixrss) / t));
181 				break;
182 
183 			case 'D':
184 				printf("%d", t == 0 ? 0 :
185 				    pgtok((r1->ru_idrss + r1->ru_isrss-
186 				    (r0->ru_idrss + r0->ru_isrss)) / t));
187 				break;
188 
189 			case 'K':
190 				printf("%d", t == 0 ? 0 :
191 				    pgtok(((r1->ru_ixrss + r1->ru_isrss +
192 				    r1->ru_idrss) - (r0->ru_ixrss +
193 				    r0->ru_idrss + r0->ru_isrss)) / t));
194 				break;
195 
196 			case 'M':
197 				printf("%d", r1->ru_maxrss / 2);
198 				break;
199 
200 			case 'F':
201 				printf("%d", r1->ru_majflt - r0->ru_majflt);
202 				break;
203 
204 			case 'R':
205 				printf("%d", r1->ru_minflt - r0->ru_minflt);
206 				break;
207 
208 			case 'I':
209 				printf("%d", r1->ru_inblock - r0->ru_inblock);
210 				break;
211 
212 			case 'O':
213 				printf("%d", r1->ru_oublock - r0->ru_oublock);
214 				break;
215 			}
216 		}
217 	}
218 	Putchar('\n');
219 #undef	pgtok
220 }
221 
222 void
pdeltat(struct timeval * t1,struct timeval * t0)223 pdeltat(struct timeval *t1, struct timeval *t0)
224 {
225 	struct timeval td;
226 
227 #ifdef TRACE
228 	tprintf("TRACE- pdeltat()\n");
229 #endif
230 	tvsub(&td, t1, t0);
231 	/* change printf formats */
232 	printf("%d.%01d", td.tv_sec, td.tv_usec / 100000);
233 }
234 
235 void
tvadd(struct timeval * tsum,struct timeval * t0)236 tvadd(struct timeval *tsum, struct timeval *t0)
237 {
238 
239 #ifdef TRACE
240 	tprintf("TRACE- tvadd()\n");
241 #endif
242 	tsum->tv_sec += t0->tv_sec;
243 	tsum->tv_usec += t0->tv_usec;
244 	if (tsum->tv_usec > 1000000) {
245 		tsum->tv_sec++;
246 		tsum->tv_usec -= 1000000;
247 	}
248 }
249 
250 void
tvsub(struct timeval * tdiff,struct timeval * t1,struct timeval * t0)251 tvsub(struct timeval *tdiff, struct timeval *t1, struct timeval *t0)
252 {
253 
254 #ifdef TRACE
255 	tprintf("TRACE- tvsub()\n");
256 #endif
257 	tdiff->tv_sec = t1->tv_sec - t0->tv_sec;
258 	tdiff->tv_usec = t1->tv_usec - t0->tv_usec;
259 	if (tdiff->tv_usec < 0) {
260 		tdiff->tv_sec--;
261 		tdiff->tv_usec += 1000000;
262 	}
263 }
264