1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1998-2001 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <limits.h> 30 #include <string.h> 31 #include <stdarg.h> 32 #include <stdio.h> 33 #include <errno.h> 34 35 #include "Pcontrol.h" 36 #include "Putil.h" 37 38 /* 39 * Place the new element on the list prior to the existing element. 40 */ 41 void 42 list_link(void *new, void *existing) 43 { 44 list_t *p = new; 45 list_t *q = existing; 46 47 if (q) { 48 p->list_forw = q; 49 p->list_back = q->list_back; 50 q->list_back->list_forw = p; 51 q->list_back = p; 52 } else { 53 p->list_forw = p->list_back = p; 54 } 55 } 56 57 /* 58 * Unchain the specified element from a list. 59 */ 60 void 61 list_unlink(void *old) 62 { 63 list_t *p = old; 64 65 if (p->list_forw != p) { 66 p->list_back->list_forw = p->list_forw; 67 p->list_forw->list_back = p->list_back; 68 } 69 p->list_forw = p->list_back = p; 70 } 71 72 /* 73 * Routines to manipulate sigset_t, fltset_t, or sysset_t. These routines 74 * are provided as equivalents for the <sys/procfs.h> macros prfillset, 75 * premptyset, praddset, and prdelset. These functions are preferable 76 * because they are not macros which rely on using sizeof (*sp), and thus 77 * can be used to create common code to manipulate event sets. The set 78 * size must be passed explicitly, e.g. : prset_fill(&set, sizeof (set)); 79 */ 80 void 81 prset_fill(void *sp, size_t size) 82 { 83 size_t i = size / sizeof (uint32_t); 84 85 while (i != 0) 86 ((uint32_t *)sp)[--i] = (uint32_t)0xFFFFFFFF; 87 } 88 89 void 90 prset_empty(void *sp, size_t size) 91 { 92 size_t i = size / sizeof (uint32_t); 93 94 while (i != 0) 95 ((uint32_t *)sp)[--i] = (uint32_t)0; 96 } 97 98 void 99 prset_add(void *sp, size_t size, uint_t flag) 100 { 101 if (flag - 1 < 32 * size / sizeof (uint32_t)) 102 ((uint32_t *)sp)[(flag - 1) / 32] |= 1U << ((flag - 1) % 32); 103 } 104 105 void 106 prset_del(void *sp, size_t size, uint_t flag) 107 { 108 if (flag - 1 < 32 * size / sizeof (uint32_t)) 109 ((uint32_t *)sp)[(flag - 1) / 32] &= ~(1U << ((flag - 1) % 32)); 110 } 111 112 int 113 prset_ismember(void *sp, size_t size, uint_t flag) 114 { 115 return ((flag - 1 < 32 * size / sizeof (uint32_t)) && 116 (((uint32_t *)sp)[(flag - 1) / 32] & (1U << ((flag - 1) % 32)))); 117 } 118 119 /* 120 * If _libproc_debug is set, printf the debug message to stderr 121 * with an appropriate prefix. 122 */ 123 /*PRINTFLIKE1*/ 124 void 125 dprintf(const char *format, ...) 126 { 127 if (_libproc_debug) { 128 va_list alist; 129 130 va_start(alist, format); 131 (void) fputs("libproc DEBUG: ", stderr); 132 (void) vfprintf(stderr, format, alist); 133 va_end(alist); 134 } 135 } 136 137 /* 138 * Printf-style error reporting function. This is used to supplement the error 139 * return codes from various libproc functions with additional text. Since we 140 * are a library, and should not be spewing messages to stderr, we provide a 141 * default version of this function that does nothing, but by calling this 142 * function we allow the client program to define its own version of the 143 * function that will interpose on our empty default. This may be useful for 144 * clients that wish to display such messages to the user. 145 */ 146 /*ARGSUSED*/ 147 /*PRINTFLIKE2*/ 148 void 149 Perror_printf(struct ps_prochandle *P, const char *format, ...) 150 { 151 /* nothing to do here */ 152 } 153