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