1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright (c) 1995-1997, by Sun Microsystems, Inc. 24*0Sstevel@tonic-gate * All rights reserved. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28*0Sstevel@tonic-gate /* All Rights Reserved */ 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate /* Portions Copyright(c) 1988, Sun Microsystems Inc. */ 32*0Sstevel@tonic-gate /* All Rights Reserved */ 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.1 */ 35*0Sstevel@tonic-gate 36*0Sstevel@tonic-gate /*LINTLIBRARY*/ 37*0Sstevel@tonic-gate 38*0Sstevel@tonic-gate /* 39*0Sstevel@tonic-gate * Compatibility lib for SunOS's wait4(). 40*0Sstevel@tonic-gate */ 41*0Sstevel@tonic-gate 42*0Sstevel@tonic-gate #include <sys/types.h> 43*0Sstevel@tonic-gate #include <sys/time.h> 44*0Sstevel@tonic-gate #include <sys/times.h> 45*0Sstevel@tonic-gate #include <sys/wait.h> 46*0Sstevel@tonic-gate #include <sys/siginfo.h> 47*0Sstevel@tonic-gate #include <sys/procset.h> 48*0Sstevel@tonic-gate #include <sys/param.h> 49*0Sstevel@tonic-gate #include <sys/resource.h> 50*0Sstevel@tonic-gate #include <unistd.h> 51*0Sstevel@tonic-gate #include <string.h> 52*0Sstevel@tonic-gate #include <errno.h> 53*0Sstevel@tonic-gate 54*0Sstevel@tonic-gate /* 55*0Sstevel@tonic-gate * Since sysV does not support rusage as in BSD, an approximate approach 56*0Sstevel@tonic-gate * is: 57*0Sstevel@tonic-gate * ... 58*0Sstevel@tonic-gate * call times 59*0Sstevel@tonic-gate * call waitid 60*0Sstevel@tonic-gate * if ( a child is found ) 61*0Sstevel@tonic-gate * call times again 62*0Sstevel@tonic-gate * rusage ~= diff in the 2 times call 63*0Sstevel@tonic-gate * ... 64*0Sstevel@tonic-gate */ 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate /* 67*0Sstevel@tonic-gate * forward declaration 68*0Sstevel@tonic-gate */ 69*0Sstevel@tonic-gate static int wstat(int, int); 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate pid_t 72*0Sstevel@tonic-gate wait4(pid_t pid, int *status, int options, struct rusage *rp) 73*0Sstevel@tonic-gate { 74*0Sstevel@tonic-gate struct tms before_tms; 75*0Sstevel@tonic-gate struct tms after_tms; 76*0Sstevel@tonic-gate siginfo_t info; 77*0Sstevel@tonic-gate int error; 78*0Sstevel@tonic-gate int noptions; 79*0Sstevel@tonic-gate idtype_t idtype; 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate if ((long)status == -1L || (long)rp == -1L) { 82*0Sstevel@tonic-gate errno = EFAULT; 83*0Sstevel@tonic-gate return (-1); 84*0Sstevel@tonic-gate } 85*0Sstevel@tonic-gate 86*0Sstevel@tonic-gate if (rp) 87*0Sstevel@tonic-gate (void) memset(rp, 0, sizeof (struct rusage)); 88*0Sstevel@tonic-gate (void) memset(&info, 0, sizeof (siginfo_t)); 89*0Sstevel@tonic-gate if (times(&before_tms) < 0) 90*0Sstevel@tonic-gate return (-1); /* errno is set by times() */ 91*0Sstevel@tonic-gate 92*0Sstevel@tonic-gate /* 93*0Sstevel@tonic-gate * SunOS's wait4() only supports WNOHANG & WUNTRACED 94*0Sstevel@tonic-gate */ 95*0Sstevel@tonic-gate if (options & ~(WNOHANG|WUNTRACED)) 96*0Sstevel@tonic-gate return (EINVAL); /* used to be done by the kernel */ 97*0Sstevel@tonic-gate noptions = options | WEXITED | WTRAPPED; 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate /* 100*0Sstevel@tonic-gate * Emulate undocumented 4.x semantics for 1186845 101*0Sstevel@tonic-gate */ 102*0Sstevel@tonic-gate if (pid < 0) { 103*0Sstevel@tonic-gate pid = -pid; 104*0Sstevel@tonic-gate idtype = P_PGID; 105*0Sstevel@tonic-gate } else if (pid == 0) 106*0Sstevel@tonic-gate idtype = P_ALL; 107*0Sstevel@tonic-gate else 108*0Sstevel@tonic-gate idtype = P_PID; 109*0Sstevel@tonic-gate 110*0Sstevel@tonic-gate error = waitid(idtype, pid, &info, noptions); 111*0Sstevel@tonic-gate if (error == 0) { 112*0Sstevel@tonic-gate clock_t diffu; /* difference in usertime (ticks) */ 113*0Sstevel@tonic-gate clock_t diffs; /* difference in systemtime (ticks) */ 114*0Sstevel@tonic-gate 115*0Sstevel@tonic-gate if ((options & WNOHANG) && (info.si_pid == 0)) 116*0Sstevel@tonic-gate return (0); /* no child found */ 117*0Sstevel@tonic-gate 118*0Sstevel@tonic-gate if (rp) { 119*0Sstevel@tonic-gate if (times(&after_tms) < 0) 120*0Sstevel@tonic-gate return (-1); /* errno set by times() */ 121*0Sstevel@tonic-gate /* 122*0Sstevel@tonic-gate * The system/user time is an approximation only !!! 123*0Sstevel@tonic-gate */ 124*0Sstevel@tonic-gate diffu = after_tms.tms_cutime - before_tms.tms_cutime; 125*0Sstevel@tonic-gate diffs = after_tms.tms_cstime - before_tms.tms_cstime; 126*0Sstevel@tonic-gate rp->ru_utime.tv_sec = diffu / HZ; 127*0Sstevel@tonic-gate rp->ru_utime.tv_usec = (diffu % HZ) * (1000000 / HZ); 128*0Sstevel@tonic-gate rp->ru_stime.tv_sec = diffs/ HZ; 129*0Sstevel@tonic-gate rp->ru_stime.tv_usec = (diffs % HZ) * (1000000 / HZ); 130*0Sstevel@tonic-gate } 131*0Sstevel@tonic-gate if (status) 132*0Sstevel@tonic-gate *status = wstat(info.si_code, info.si_status); 133*0Sstevel@tonic-gate return (info.si_pid); 134*0Sstevel@tonic-gate } else { 135*0Sstevel@tonic-gate return (-1); /* error number is set by waitid() */ 136*0Sstevel@tonic-gate } 137*0Sstevel@tonic-gate } 138*0Sstevel@tonic-gate 139*0Sstevel@tonic-gate /* 140*0Sstevel@tonic-gate * Convert the status code to old style wait status 141*0Sstevel@tonic-gate */ 142*0Sstevel@tonic-gate static int 143*0Sstevel@tonic-gate wstat(int code, int status) 144*0Sstevel@tonic-gate { 145*0Sstevel@tonic-gate int stat = (status & 0377); 146*0Sstevel@tonic-gate 147*0Sstevel@tonic-gate switch (code) { 148*0Sstevel@tonic-gate case CLD_EXITED: 149*0Sstevel@tonic-gate stat <<= 8; 150*0Sstevel@tonic-gate break; 151*0Sstevel@tonic-gate case CLD_DUMPED: 152*0Sstevel@tonic-gate stat |= WCOREFLG; 153*0Sstevel@tonic-gate break; 154*0Sstevel@tonic-gate case CLD_KILLED: 155*0Sstevel@tonic-gate break; 156*0Sstevel@tonic-gate case CLD_TRAPPED: 157*0Sstevel@tonic-gate case CLD_STOPPED: 158*0Sstevel@tonic-gate stat <<= 8; 159*0Sstevel@tonic-gate stat |= WSTOPFLG; 160*0Sstevel@tonic-gate break; 161*0Sstevel@tonic-gate case CLD_CONTINUED: 162*0Sstevel@tonic-gate stat = WCONTFLG; 163*0Sstevel@tonic-gate break; 164*0Sstevel@tonic-gate } 165*0Sstevel@tonic-gate return (stat); 166*0Sstevel@tonic-gate } 167