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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2013 Gary Mills
23 *
24 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
25 * Use is subject to license terms.
26 *
27 * Portions Copyright 2009 Chad Mynhier
28 */
29
30 #include <procfs.h>
31 #include <unistd.h>
32 #include <stdlib.h>
33 #include <pwd.h>
34 #include <ctype.h>
35 #include <string.h>
36 #include <libintl.h>
37 #include <errno.h>
38 #include <zone.h>
39 #include <libzonecfg.h>
40
41 #include "prstat.h"
42 #include "prutil.h"
43 #include "prtable.h"
44
45 static plwp_t *plwp_tbl[PLWP_TBL_SZ];
46
47 void
48 lwpid_init()
49 {
50 (void) memset(&plwp_tbl, 0, sizeof (plwp_t *) * PLWP_TBL_SZ);
51 }
52
53 static uid_t
54 pwd_getid(char *name)
55 {
56 struct passwd *pwd;
57
58 if ((pwd = getpwnam(name)) == NULL)
59 Die(gettext("invalid user name: %s\n"), name);
60 return (pwd->pw_uid);
61 }
62
63 void
64 pwd_getname(uid_t uid, char *name, size_t length, int noresolve,
65 int termcap, size_t width)
66 {
67 struct passwd *pwd;
68 size_t n;
69
70 if (noresolve || (pwd = getpwuid(uid)) == NULL) {
71 (void) snprintf(name, length, "%u", uid);
72 } else {
73 n = strlen(pwd->pw_name);
74 if (termcap && n > width)
75 (void) snprintf(name, length, "%.*s%c",
76 width - 1, pwd->pw_name, '*');
77 else
78 (void) snprintf(name, length, "%s", pwd->pw_name);
79 }
80 }
81
82 void
83 add_uid(uidtbl_t *tbl, char *name)
84 {
85 uid_t *uid;
86
87 if (tbl->n_size == tbl->n_nent) { /* reallocation */
88 if ((tbl->n_size *= 2) == 0)
89 tbl->n_size = 4; /* first time */
90 tbl->n_list = Realloc(tbl->n_list, tbl->n_size*sizeof (uid_t));
91 }
92
93 uid = &tbl->n_list[tbl->n_nent++];
94
95 if (isdigit(name[0])) {
96 *uid = Atoi(name);
97 } else {
98 *uid = pwd_getid(name);
99 }
100 }
101
102 int
103 has_uid(uidtbl_t *tbl, uid_t uid)
104 {
105 size_t i;
106
107 if (tbl->n_nent) { /* do linear search if table is not empty */
108 for (i = 0; i < tbl->n_nent; i++)
109 if (tbl->n_list[i] == uid)
110 return (1);
111 } else {
112 return (1); /* if table is empty return true */
113 }
114
115 return (0); /* nothing has been found */
116 }
117
118 void
119 add_element(table_t *table, long element)
120 {
121 if (table->t_size == table->t_nent) {
122 if ((table->t_size *= 2) == 0)
123 table->t_size = 4;
124 table->t_list = Realloc(table->t_list,
125 table->t_size * sizeof (long));
126 }
127 table->t_list[table->t_nent++] = element;
128 }
129
130 int
131 has_element(table_t *table, long element)
132 {
133 size_t i;
134
135 if (table->t_nent) { /* do linear search if table is not empty */
136 for (i = 0; i < table->t_nent; i++)
137 if (table->t_list[i] == element)
138 return (1);
139 } else { /* if table is empty then */
140 return (1); /* pretend that element was found */
141 }
142
143 return (0); /* element was not found */
144 }
145
146 int
147 foreach_element(table_t *table, void *buf, void (*walker)(long, void *))
148 {
149 size_t i;
150
151 if (table->t_nent) {
152 for (i = 0; i < table->t_nent; i++)
153 walker(table->t_list[i], buf);
154 } else {
155 return (0);
156 }
157 return (1);
158 }
159
160 void
161 add_zone(zonetbl_t *tbl, char *str)
162 {
163 zonename_t *entp;
164 zoneid_t id;
165 char *cp;
166
167 /*
168 * str should be either the name of a configured zone, or the
169 * id of a running zone. If str is a zone name, store the name
170 * in the table; otherwise, just store the id.
171 */
172 if (zone_get_id(str, &id) != 0) {
173 Die(gettext("unknown zone -- %s\n"), str);
174 /*NOTREACHED*/
175 }
176
177 /* was zone specified by name or id? */
178 errno = 0;
179 if (id == (zoneid_t)strtol(str, &cp, 0) && errno == 0 && cp != str &&
180 *cp == '\0') {
181 /* found it by id, don't store the name */
182 str = NULL;
183 }
184
185 if (tbl->z_size == tbl->z_nent) { /* reallocation */
186 if ((tbl->z_size *= 2) == 0)
187 tbl->z_size = 4; /* first time */
188 tbl->z_list =
189 Realloc(tbl->z_list, tbl->z_size * sizeof (zonename_t));
190 }
191
192 entp = &tbl->z_list[tbl->z_nent++];
193 if (str)
194 (void) strlcpy(entp->z_name, str, ZONENAME_MAX);
195 else
196 entp->z_name[0] = '\0';
197 entp->z_id = id;
198 }
199
200 int
201 has_zone(zonetbl_t *tbl, zoneid_t id)
202 {
203 long i;
204
205 if (tbl->z_nent) { /* do linear search if table is not empty */
206 for (i = 0; i < tbl->z_nent; i++)
207 if (tbl->z_list[i].z_id == id)
208 return (1);
209 return (0); /* nothing has been found */
210 }
211
212 return (1); /* if table is empty return true */
213 }
214
215 /*
216 * Lookup ids for each zone name; this is done once each time /proc
217 * is scanned to avoid calling getzoneidbyname for each process.
218 */
219 void
220 convert_zone(zonetbl_t *tbl)
221 {
222 long i;
223 zoneid_t id;
224 char *name;
225
226 for (i = 0; i < tbl->z_nent; i++) {
227 name = tbl->z_list[i].z_name;
228 if (name != NULL) {
229 if ((id = getzoneidbyname(name)) != -1)
230 tbl->z_list[i].z_id = id;
231 }
232 }
233 }
234
235 void
236 lwpid_add(lwp_info_t *lwp, pid_t pid, id_t lwpid)
237 {
238 plwp_t *elm = Zalloc(sizeof (plwp_t));
239 int hash = pid % PLWP_TBL_SZ;
240
241 elm->l_pid = pid;
242 elm->l_lwpid = lwpid;
243 elm->l_lwp = lwp;
244 elm->l_next = plwp_tbl[hash]; /* add in front of chain */
245 plwp_tbl[hash] = elm;
246 }
247
248 void
249 lwpid_del(pid_t pid, id_t lwpid)
250 {
251 plwp_t *elm, *elm_prev;
252 int hash = pid % PLWP_TBL_SZ;
253
254 elm = plwp_tbl[hash];
255 elm_prev = NULL;
256
257 while (elm) {
258 if ((elm->l_pid == pid) && (elm->l_lwpid == lwpid)) {
259 if (!elm_prev) /* first chain element */
260 plwp_tbl[hash] = elm->l_next;
261 else
262 elm_prev->l_next = elm->l_next;
263 free(elm);
264 break;
265 } else {
266 elm_prev = elm;
267 elm = elm->l_next;
268 }
269 }
270 }
271
272 static plwp_t *
273 lwpid_getptr(pid_t pid, id_t lwpid)
274 {
275 plwp_t *elm = plwp_tbl[pid % PLWP_TBL_SZ];
276 while (elm) {
277 if ((elm->l_pid == pid) && (elm->l_lwpid == lwpid))
278 return (elm);
279 else
280 elm = elm->l_next;
281 }
282 return (NULL);
283 }
284
285 lwp_info_t *
286 lwpid_get(pid_t pid, id_t lwpid)
287 {
288 plwp_t *elm = lwpid_getptr(pid, lwpid);
289 if (elm)
290 return (elm->l_lwp);
291 else
292 return (NULL);
293 }
294
295 int
296 lwpid_pidcheck(pid_t pid)
297 {
298 plwp_t *elm;
299 elm = plwp_tbl[pid % PLWP_TBL_SZ];
300 while (elm) {
301 if (elm->l_pid == pid)
302 return (1);
303 else
304 elm = elm->l_next;
305 }
306 return (0);
307 }
308
309 int
310 lwpid_is_active(pid_t pid, id_t lwpid)
311 {
312 plwp_t *elm = lwpid_getptr(pid, lwpid);
313 if (elm)
314 return (elm->l_active);
315 else
316 return (0);
317 }
318
319 void
320 lwpid_set_active(pid_t pid, id_t lwpid)
321 {
322 plwp_t *elm = lwpid_getptr(pid, lwpid);
323 if (elm)
324 elm->l_active = LWP_ACTIVE;
325 }