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 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 /* 27 * Copyright (c) 2013 by Delphix. All rights reserved. 28 */ 29 30 #include <limits.h> 31 #include <string.h> 32 #include <stdarg.h> 33 #include <stdio.h> 34 #include <errno.h> 35 36 #include "Pcontrol.h" 37 #include "Putil.h" 38 39 /* 40 * Routines to manipulate sigset_t, fltset_t, or sysset_t. These routines 41 * are provided as equivalents for the <sys/procfs.h> macros prfillset, 42 * premptyset, praddset, and prdelset. These functions are preferable 43 * because they are not macros which rely on using sizeof (*sp), and thus 44 * can be used to create common code to manipulate event sets. The set 45 * size must be passed explicitly, e.g. : prset_fill(&set, sizeof (set)); 46 */ 47 void 48 prset_fill(void *sp, size_t size) 49 { 50 size_t i = size / sizeof (uint32_t); 51 52 while (i != 0) 53 ((uint32_t *)sp)[--i] = (uint32_t)0xFFFFFFFF; 54 } 55 56 void 57 prset_empty(void *sp, size_t size) 58 { 59 size_t i = size / sizeof (uint32_t); 60 61 while (i != 0) 62 ((uint32_t *)sp)[--i] = (uint32_t)0; 63 } 64 65 void 66 prset_add(void *sp, size_t size, uint_t flag) 67 { 68 if (flag - 1 < 32 * size / sizeof (uint32_t)) 69 ((uint32_t *)sp)[(flag - 1) / 32] |= 1U << ((flag - 1) % 32); 70 } 71 72 void 73 prset_del(void *sp, size_t size, uint_t flag) 74 { 75 if (flag - 1 < 32 * size / sizeof (uint32_t)) 76 ((uint32_t *)sp)[(flag - 1) / 32] &= ~(1U << ((flag - 1) % 32)); 77 } 78 79 int 80 prset_ismember(void *sp, size_t size, uint_t flag) 81 { 82 return ((flag - 1 < 32 * size / sizeof (uint32_t)) && 83 (((uint32_t *)sp)[(flag - 1) / 32] & (1U << ((flag - 1) % 32)))); 84 } 85 86 /* 87 * If _libproc_debug is set, printf the debug message to stderr 88 * with an appropriate prefix. 89 */ 90 /*PRINTFLIKE1*/ 91 void 92 dprintf(const char *format, ...) 93 { 94 if (_libproc_debug) { 95 va_list alist; 96 97 va_start(alist, format); 98 (void) fputs("libproc DEBUG: ", stderr); 99 (void) vfprintf(stderr, format, alist); 100 va_end(alist); 101 } 102 } 103 104 /* 105 * Printf-style error reporting function. This is used to supplement the error 106 * return codes from various libproc functions with additional text. Since we 107 * are a library, and should not be spewing messages to stderr, we provide a 108 * default version of this function that does nothing, but by calling this 109 * function we allow the client program to define its own version of the 110 * function that will interpose on our empty default. This may be useful for 111 * clients that wish to display such messages to the user. 112 */ 113 /*ARGSUSED*/ 114 /*PRINTFLIKE2*/ 115 void 116 Perror_printf(struct ps_prochandle *P, const char *format, ...) 117 { 118 /* nothing to do here */ 119 } 120 121 /* 122 * Default operations. 123 */ 124 static ssize_t 125 Pdefault_ssizet() 126 { 127 errno = ENOTSUP; 128 return (-1); 129 } 130 131 static int 132 Pdefault_int() 133 { 134 errno = ENOTSUP; 135 return (-1); 136 } 137 138 static void 139 Pdefault_void() 140 { 141 } 142 143 static void * 144 Pdefault_voidp() 145 { 146 errno = ENOTSUP; 147 return (NULL); 148 } 149 150 static const ps_ops_t P_default_ops = { 151 .pop_pread = (pop_pread_t)Pdefault_ssizet, 152 .pop_pwrite = (pop_pwrite_t)Pdefault_ssizet, 153 .pop_read_maps = (pop_read_maps_t)Pdefault_int, 154 .pop_read_aux = (pop_read_aux_t)Pdefault_void, 155 .pop_cred = (pop_cred_t)Pdefault_int, 156 .pop_priv = (pop_priv_t)Pdefault_int, 157 .pop_psinfo = (pop_psinfo_t)Pdefault_voidp, 158 .pop_status = (pop_status_t)Pdefault_void, 159 .pop_lstatus = (pop_lstatus_t)Pdefault_voidp, 160 .pop_lpsinfo = (pop_lpsinfo_t)Pdefault_voidp, 161 .pop_fini = (pop_fini_t)Pdefault_void, 162 .pop_platform = (pop_platform_t)Pdefault_voidp, 163 .pop_uname = (pop_uname_t)Pdefault_int, 164 .pop_zonename = (pop_zonename_t)Pdefault_voidp, 165 .pop_execname = (pop_execname_t)Pdefault_voidp, 166 .pop_secflags = (pop_secflags_t)Pdefault_int, 167 .pop_cwd = (pop_cwd_t)Pdefault_int, 168 #if defined(__i386) || defined(__amd64) 169 .pop_ldt = (pop_ldt_t)Pdefault_int 170 #endif 171 }; 172 173 /* 174 * Initialize the destination ops vector with functions from the source. 175 * Functions which are NULL in the source ops vector are set to corresponding 176 * default function in the destination vector. 177 */ 178 void 179 Pinit_ops(ps_ops_t *dst, const ps_ops_t *src) 180 { 181 *dst = P_default_ops; 182 183 if (src->pop_pread != NULL) 184 dst->pop_pread = src->pop_pread; 185 if (src->pop_pwrite != NULL) 186 dst->pop_pwrite = src->pop_pwrite; 187 if (src->pop_read_maps != NULL) 188 dst->pop_read_maps = src->pop_read_maps; 189 if (src->pop_read_aux != NULL) 190 dst->pop_read_aux = src->pop_read_aux; 191 if (src->pop_cred != NULL) 192 dst->pop_cred = src->pop_cred; 193 if (src->pop_priv != NULL) 194 dst->pop_priv = src->pop_priv; 195 if (src->pop_psinfo != NULL) 196 dst->pop_psinfo = src->pop_psinfo; 197 if (src->pop_status != NULL) 198 dst->pop_status = src->pop_status; 199 if (src->pop_lstatus != NULL) 200 dst->pop_lstatus = src->pop_lstatus; 201 if (src->pop_lpsinfo != NULL) 202 dst->pop_lpsinfo = src->pop_lpsinfo; 203 if (src->pop_fini != NULL) 204 dst->pop_fini = src->pop_fini; 205 if (src->pop_platform != NULL) 206 dst->pop_platform = src->pop_platform; 207 if (src->pop_uname != NULL) 208 dst->pop_uname = src->pop_uname; 209 if (src->pop_zonename != NULL) 210 dst->pop_zonename = src->pop_zonename; 211 if (src->pop_execname != NULL) 212 dst->pop_execname = src->pop_execname; 213 if (src->pop_secflags != NULL) 214 dst->pop_secflags = src->pop_secflags; 215 if (src->pop_cwd != NULL) 216 dst->pop_cwd = src->pop_cwd; 217 #if defined(__i386) || defined(__amd64) 218 if (src->pop_ldt != NULL) 219 dst->pop_ldt = src->pop_ldt; 220 #endif 221 } 222