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 /*
23 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26 #include "libuutil_common.h"
27
28 #include <assert.h>
29 #include <errno.h>
30 #include <libintl.h>
31 #include <pthread.h>
32 #include <stdarg.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <sys/debug.h>
37 #include <thread.h>
38 #include <unistd.h>
39 #include <ctype.h>
40
41 #if !defined(TEXT_DOMAIN)
42 #define TEXT_DOMAIN "SYS_TEST"
43 #endif
44
45 /*
46 * All of the old code under !defined(PTHREAD_ONCE_KEY_NP)
47 * is here to enable the building of a native version of
48 * libuutil.so when the build machine has not yet been upgraded
49 * to a version of libc that provides pthread_key_create_once_np().
50 * It should all be deleted when solaris_nevada ships.
51 * The code is not MT-safe in a relaxed memory model.
52 */
53
54 #if defined(PTHREAD_ONCE_KEY_NP)
55 static pthread_key_t uu_error_key = PTHREAD_ONCE_KEY_NP;
56 #else /* PTHREAD_ONCE_KEY_NP */
57 static pthread_key_t uu_error_key = 0;
58 static pthread_mutex_t uu_key_lock = PTHREAD_MUTEX_INITIALIZER;
59 #endif /* PTHREAD_ONCE_KEY_NP */
60
61 static int uu_error_key_setup = 0;
62
63 static pthread_mutex_t uu_panic_lock = PTHREAD_MUTEX_INITIALIZER;
64 /* LINTED static unused */
65 static const char *uu_panic_format;
66 /* LINTED static unused */
67 static va_list uu_panic_args;
68 static pthread_t uu_panic_thread;
69
70 static uint32_t _uu_main_error;
71
72 void
uu_set_error(uint_t code)73 uu_set_error(uint_t code)
74 {
75 if (thr_main() != 0) {
76 _uu_main_error = code;
77 return;
78 }
79 #if defined(PTHREAD_ONCE_KEY_NP)
80 if (pthread_key_create_once_np(&uu_error_key, NULL) != 0)
81 uu_error_key_setup = -1;
82 else
83 uu_error_key_setup = 1;
84 #else /* PTHREAD_ONCE_KEY_NP */
85 if (uu_error_key_setup == 0) {
86 (void) pthread_mutex_lock(&uu_key_lock);
87 if (uu_error_key_setup == 0) {
88 if (pthread_key_create(&uu_error_key, NULL) != 0)
89 uu_error_key_setup = -1;
90 else
91 uu_error_key_setup = 1;
92 }
93 (void) pthread_mutex_unlock(&uu_key_lock);
94 }
95 #endif /* PTHREAD_ONCE_KEY_NP */
96 if (uu_error_key_setup > 0)
97 (void) pthread_setspecific(uu_error_key,
98 (void *)(uintptr_t)code);
99 }
100
101 uint32_t
uu_error(void)102 uu_error(void)
103 {
104 if (thr_main() != 0)
105 return (_uu_main_error);
106
107 if (uu_error_key_setup < 0) /* can't happen? */
108 return (UU_ERROR_UNKNOWN);
109
110 /*
111 * Because UU_ERROR_NONE == 0, if uu_set_error() was
112 * never called, then this will return UU_ERROR_NONE:
113 */
114 return ((uint32_t)(uintptr_t)pthread_getspecific(uu_error_key));
115 }
116
117 const char *
uu_strerror(uint32_t code)118 uu_strerror(uint32_t code)
119 {
120 const char *str;
121
122 switch (code) {
123 case UU_ERROR_NONE:
124 str = dgettext(TEXT_DOMAIN, "No error");
125 break;
126
127 case UU_ERROR_INVALID_ARGUMENT:
128 str = dgettext(TEXT_DOMAIN, "Invalid argument");
129 break;
130
131 case UU_ERROR_UNKNOWN_FLAG:
132 str = dgettext(TEXT_DOMAIN, "Unknown flag passed");
133 break;
134
135 case UU_ERROR_NO_MEMORY:
136 str = dgettext(TEXT_DOMAIN, "Out of memory");
137 break;
138
139 case UU_ERROR_CALLBACK_FAILED:
140 str = dgettext(TEXT_DOMAIN, "Callback-initiated failure");
141 break;
142
143 case UU_ERROR_NOT_SUPPORTED:
144 str = dgettext(TEXT_DOMAIN, "Operation not supported");
145 break;
146
147 case UU_ERROR_EMPTY:
148 str = dgettext(TEXT_DOMAIN, "No value provided");
149 break;
150
151 case UU_ERROR_UNDERFLOW:
152 str = dgettext(TEXT_DOMAIN, "Value too small");
153 break;
154
155 case UU_ERROR_OVERFLOW:
156 str = dgettext(TEXT_DOMAIN, "Value too large");
157 break;
158
159 case UU_ERROR_INVALID_CHAR:
160 str = dgettext(TEXT_DOMAIN,
161 "Value contains unexpected character");
162 break;
163
164 case UU_ERROR_INVALID_DIGIT:
165 str = dgettext(TEXT_DOMAIN,
166 "Value contains digit not in base");
167 break;
168
169 case UU_ERROR_SYSTEM:
170 str = dgettext(TEXT_DOMAIN, "Underlying system error");
171 break;
172
173 case UU_ERROR_UNKNOWN:
174 str = dgettext(TEXT_DOMAIN, "Error status not known");
175 break;
176
177 default:
178 errno = ESRCH;
179 str = NULL;
180 break;
181 }
182 return (str);
183 }
184
185 void
uu_panic(const char * format,...)186 uu_panic(const char *format, ...)
187 {
188 va_list args;
189
190 va_start(args, format);
191
192 (void) pthread_mutex_lock(&uu_panic_lock);
193 if (uu_panic_thread == 0) {
194 uu_panic_thread = pthread_self();
195 uu_panic_format = format;
196 va_copy(uu_panic_args, args);
197 }
198 (void) pthread_mutex_unlock(&uu_panic_lock);
199
200 (void) vfprintf(stderr, format, args);
201
202 if (uu_panic_thread == pthread_self())
203 abort();
204 else
205 for (;;)
206 (void) pause();
207 }
208
209 int
assfail(const char * astring,const char * file,int line)210 assfail(const char *astring, const char *file, int line)
211 {
212 __assert(astring, file, line);
213 /*NOTREACHED*/
214 return (0);
215 }
216
217 static void
uu_lockup(void)218 uu_lockup(void)
219 {
220 (void) pthread_mutex_lock(&uu_panic_lock);
221 #if !defined(PTHREAD_ONCE_KEY_NP)
222 (void) pthread_mutex_lock(&uu_key_lock);
223 #endif
224 uu_avl_lockup();
225 uu_list_lockup();
226 }
227
228 static void
uu_release(void)229 uu_release(void)
230 {
231 (void) pthread_mutex_unlock(&uu_panic_lock);
232 #if !defined(PTHREAD_ONCE_KEY_NP)
233 (void) pthread_mutex_unlock(&uu_key_lock);
234 #endif
235 uu_avl_release();
236 uu_list_release();
237 }
238
239 static void
uu_release_child(void)240 uu_release_child(void)
241 {
242 uu_panic_format = NULL;
243 uu_panic_thread = 0;
244
245 uu_release();
246 }
247
248 #pragma init(uu_init)
249 static void
uu_init(void)250 uu_init(void)
251 {
252 (void) pthread_atfork(uu_lockup, uu_release, uu_release_child);
253 }
254
255 /*
256 * Dump a block of memory in hex+ascii, for debugging
257 */
258 void
uu_dump(FILE * out,const char * prefix,const void * buf,size_t len)259 uu_dump(FILE *out, const char *prefix, const void *buf, size_t len)
260 {
261 const unsigned char *p = buf;
262 int i;
263
264 for (i = 0; i < len; i += 16) {
265 int j;
266
267 (void) fprintf(out, "%s", prefix);
268 for (j = 0; j < 16 && i + j < len; j++) {
269 (void) fprintf(out, "%2.2x ", p[i + j]);
270 }
271 for (; j < 16; j++) {
272 (void) fprintf(out, " ");
273 }
274 for (j = 0; j < 16 && i + j < len; j++) {
275 (void) fprintf(out, "%c",
276 isprint(p[i + j]) ? p[i + j] : '.');
277 }
278 (void) fprintf(out, "\n");
279 }
280 }
281