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3946 ::gcore
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
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--- old/usr/src/lib/libproc/common/Putil.c
+++ new/usr/src/lib/libproc/common/Putil.c
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License, Version 1.0 only
6 6 * (the "License"). You may not use this file except in compliance
7 7 * with the License.
8 8 *
9 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 10 * or http://www.opensolaris.org/os/licensing.
11 11 * See the License for the specific language governing permissions
12 12 * and limitations under the License.
13 13 *
14 14 * When distributing Covered Code, include this CDDL HEADER in each
15 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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16 16 * If applicable, add the following below this CDDL HEADER, with the
17 17 * fields enclosed by brackets "[]" replaced with your own identifying
18 18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 19 *
20 20 * CDDL HEADER END
21 21 */
22 22 /*
23 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 24 * Use is subject to license terms.
25 25 */
26 +/*
27 + * Copyright (c) 2013 by Delphix. All rights reserved.
28 + */
26 29
27 -#pragma ident "%Z%%M% %I% %E% SMI"
28 -
29 30 #include <limits.h>
30 31 #include <string.h>
31 32 #include <stdarg.h>
32 33 #include <stdio.h>
33 34 #include <errno.h>
34 35
35 36 #include "Pcontrol.h"
36 37 #include "Putil.h"
37 38
38 39 /*
39 40 * Place the new element on the list prior to the existing element.
40 41 */
41 42 void
42 43 list_link(void *new, void *existing)
43 44 {
44 45 plist_t *p = new;
45 46 plist_t *q = existing;
46 47
47 48 if (q) {
48 49 p->list_forw = q;
49 50 p->list_back = q->list_back;
50 51 q->list_back->list_forw = p;
51 52 q->list_back = p;
52 53 } else {
53 54 p->list_forw = p->list_back = p;
54 55 }
55 56 }
56 57
57 58 /*
58 59 * Unchain the specified element from a list.
59 60 */
60 61 void
61 62 list_unlink(void *old)
62 63 {
63 64 plist_t *p = old;
64 65
65 66 if (p->list_forw != p) {
66 67 p->list_back->list_forw = p->list_forw;
67 68 p->list_forw->list_back = p->list_back;
68 69 }
69 70 p->list_forw = p->list_back = p;
70 71 }
71 72
72 73 /*
73 74 * Routines to manipulate sigset_t, fltset_t, or sysset_t. These routines
74 75 * are provided as equivalents for the <sys/procfs.h> macros prfillset,
75 76 * premptyset, praddset, and prdelset. These functions are preferable
76 77 * because they are not macros which rely on using sizeof (*sp), and thus
77 78 * can be used to create common code to manipulate event sets. The set
78 79 * size must be passed explicitly, e.g. : prset_fill(&set, sizeof (set));
79 80 */
80 81 void
81 82 prset_fill(void *sp, size_t size)
82 83 {
83 84 size_t i = size / sizeof (uint32_t);
84 85
85 86 while (i != 0)
86 87 ((uint32_t *)sp)[--i] = (uint32_t)0xFFFFFFFF;
87 88 }
88 89
89 90 void
90 91 prset_empty(void *sp, size_t size)
91 92 {
92 93 size_t i = size / sizeof (uint32_t);
93 94
94 95 while (i != 0)
95 96 ((uint32_t *)sp)[--i] = (uint32_t)0;
96 97 }
97 98
98 99 void
99 100 prset_add(void *sp, size_t size, uint_t flag)
100 101 {
101 102 if (flag - 1 < 32 * size / sizeof (uint32_t))
102 103 ((uint32_t *)sp)[(flag - 1) / 32] |= 1U << ((flag - 1) % 32);
103 104 }
104 105
105 106 void
106 107 prset_del(void *sp, size_t size, uint_t flag)
107 108 {
108 109 if (flag - 1 < 32 * size / sizeof (uint32_t))
109 110 ((uint32_t *)sp)[(flag - 1) / 32] &= ~(1U << ((flag - 1) % 32));
110 111 }
111 112
112 113 int
113 114 prset_ismember(void *sp, size_t size, uint_t flag)
114 115 {
115 116 return ((flag - 1 < 32 * size / sizeof (uint32_t)) &&
116 117 (((uint32_t *)sp)[(flag - 1) / 32] & (1U << ((flag - 1) % 32))));
117 118 }
118 119
119 120 /*
120 121 * If _libproc_debug is set, printf the debug message to stderr
121 122 * with an appropriate prefix.
122 123 */
123 124 /*PRINTFLIKE1*/
124 125 void
125 126 dprintf(const char *format, ...)
126 127 {
127 128 if (_libproc_debug) {
128 129 va_list alist;
129 130
130 131 va_start(alist, format);
131 132 (void) fputs("libproc DEBUG: ", stderr);
132 133 (void) vfprintf(stderr, format, alist);
133 134 va_end(alist);
134 135 }
135 136 }
136 137
137 138 /*
138 139 * Printf-style error reporting function. This is used to supplement the error
139 140 * return codes from various libproc functions with additional text. Since we
140 141 * are a library, and should not be spewing messages to stderr, we provide a
141 142 * default version of this function that does nothing, but by calling this
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142 143 * function we allow the client program to define its own version of the
143 144 * function that will interpose on our empty default. This may be useful for
144 145 * clients that wish to display such messages to the user.
145 146 */
146 147 /*ARGSUSED*/
147 148 /*PRINTFLIKE2*/
148 149 void
149 150 Perror_printf(struct ps_prochandle *P, const char *format, ...)
150 151 {
151 152 /* nothing to do here */
153 +}
154 +
155 +/*
156 + * Default operations.
157 + */
158 +static ssize_t
159 +Pdefault_ssizet()
160 +{
161 + return (-1);
162 +}
163 +
164 +static int
165 +Pdefault_int()
166 +{
167 + return (-1);
168 +}
169 +
170 +static void
171 +Pdefault_void()
172 +{
173 +}
174 +
175 +static void *
176 +Pdefault_voidp()
177 +{
178 + return (NULL);
179 +}
180 +
181 +static const ps_ops_t P_default_ops = {
182 + .pop_pread = (pop_pread_t)Pdefault_ssizet,
183 + .pop_pwrite = (pop_pwrite_t)Pdefault_ssizet,
184 + .pop_read_maps = (pop_read_maps_t)Pdefault_int,
185 + .pop_read_aux = (pop_read_aux_t)Pdefault_void,
186 + .pop_cred = (pop_cred_t)Pdefault_int,
187 + .pop_priv = (pop_priv_t)Pdefault_int,
188 + .pop_psinfo = (pop_psinfo_t)Pdefault_voidp,
189 + .pop_status = (pop_status_t)Pdefault_void,
190 + .pop_lstatus = (pop_lstatus_t)Pdefault_voidp,
191 + .pop_lpsinfo = (pop_lpsinfo_t)Pdefault_voidp,
192 + .pop_fini = (pop_fini_t)Pdefault_void,
193 + .pop_platform = (pop_platform_t)Pdefault_voidp,
194 + .pop_uname = (pop_uname_t)Pdefault_int,
195 + .pop_zonename = (pop_zonename_t)Pdefault_voidp,
196 + .pop_execname = (pop_execname_t)Pdefault_voidp,
197 +#if defined(__i386) || defined(__amd64)
198 + .pop_ldt = (pop_ldt_t)Pdefault_int
199 +#endif
200 +};
201 +
202 +/*
203 + * Initialize the destination ops vector with functions from the source.
204 + * Functions which are NULL in the source ops vector are set to corresponding
205 + * default function in the destination vector.
206 + */
207 +void
208 +Pinit_ops(ps_ops_t *dst, const ps_ops_t *src)
209 +{
210 + *dst = P_default_ops;
211 +
212 + if (src->pop_pread != NULL)
213 + dst->pop_pread = src->pop_pread;
214 + if (src->pop_pwrite != NULL)
215 + dst->pop_pwrite = src->pop_pwrite;
216 + if (src->pop_read_maps != NULL)
217 + dst->pop_read_maps = src->pop_read_maps;
218 + if (src->pop_read_aux != NULL)
219 + dst->pop_read_aux = src->pop_read_aux;
220 + if (src->pop_cred != NULL)
221 + dst->pop_cred = src->pop_cred;
222 + if (src->pop_priv != NULL)
223 + dst->pop_priv = src->pop_priv;
224 + if (src->pop_psinfo != NULL)
225 + dst->pop_psinfo = src->pop_psinfo;
226 + if (src->pop_status != NULL)
227 + dst->pop_status = src->pop_status;
228 + if (src->pop_lstatus != NULL)
229 + dst->pop_lstatus = src->pop_lstatus;
230 + if (src->pop_lpsinfo != NULL)
231 + dst->pop_lpsinfo = src->pop_lpsinfo;
232 + if (src->pop_fini != NULL)
233 + dst->pop_fini = src->pop_fini;
234 + if (src->pop_platform != NULL)
235 + dst->pop_platform = src->pop_platform;
236 + if (src->pop_uname != NULL)
237 + dst->pop_uname = src->pop_uname;
238 + if (src->pop_zonename != NULL)
239 + dst->pop_zonename = src->pop_zonename;
240 + if (src->pop_execname != NULL)
241 + dst->pop_execname = src->pop_execname;
242 +#if defined(__i386) || defined(__amd64)
243 + if (src->pop_ldt != NULL)
244 + dst->pop_ldt = src->pop_ldt;
245 +#endif
152 246 }
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