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 /* 24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 #pragma ident "%Z%%M% %I% %E% SMI" 29 30 #include <ctype.h> 31 #include <errno.h> 32 #include <stdarg.h> 33 34 #include <fmd_alloc.h> 35 #include <fmd_subr.h> 36 #include <fmd_error.h> 37 #include <fmd_string.h> 38 #include <fmd_scheme.h> 39 #include <fmd_fmri.h> 40 #include <fmd.h> 41 42 /* 43 * Interfaces to be used by the plugins 44 */ 45 46 void * 47 fmd_fmri_alloc(size_t size) 48 { 49 return (fmd_alloc(size, FMD_SLEEP)); 50 } 51 52 void * 53 fmd_fmri_zalloc(size_t size) 54 { 55 return (fmd_zalloc(size, FMD_SLEEP)); 56 } 57 58 void 59 fmd_fmri_free(void *data, size_t size) 60 { 61 fmd_free(data, size); 62 } 63 64 int 65 fmd_fmri_set_errno(int err) 66 { 67 errno = err; 68 return (-1); 69 } 70 71 void 72 fmd_fmri_warn(const char *format, ...) 73 { 74 va_list ap; 75 76 va_start(ap, format); 77 fmd_verror(EFMD_FMRI_SCHEME, format, ap); 78 va_end(ap); 79 } 80 81 /* 82 * Convert an input string to a URI escaped string and return the new string. 83 * RFC2396 Section 2.4 says that data must be escaped if it does not have a 84 * representation using an unreserved character, where an unreserved character 85 * is one that is either alphanumberic or one of the marks defined in S2.3. 86 */ 87 static size_t 88 fmd_fmri_uriescape(const char *s, const char *xmark, char *buf, size_t len) 89 { 90 static const char rfc2396_mark[] = "-_.!~*'()"; 91 static const char hex_digits[] = "0123456789ABCDEF"; 92 static const char empty_str[] = ""; 93 94 const char *p; 95 char c, *q; 96 size_t n = 0; 97 98 if (s == NULL) 99 s = empty_str; 100 101 if (xmark == NULL) 102 xmark = empty_str; 103 104 for (p = s; (c = *p) != '\0'; p++) { 105 if (isalnum(c) || strchr(rfc2396_mark, c) || strchr(xmark, c)) 106 n++; /* represent c as itself */ 107 else 108 n += 3; /* represent c as escape */ 109 } 110 111 if (buf == NULL) 112 return (n); 113 114 for (p = s, q = buf; (c = *p) != '\0' && q < buf + len; p++) { 115 if (isalnum(c) || strchr(rfc2396_mark, c) || strchr(xmark, c)) { 116 *q++ = c; 117 } else { 118 *q++ = '%'; 119 *q++ = hex_digits[((uchar_t)c & 0xf0) >> 4]; 120 *q++ = hex_digits[(uchar_t)c & 0xf]; 121 } 122 } 123 124 if (q == buf + len) 125 q--; /* len is too small: truncate output string */ 126 127 *q = '\0'; 128 return (n); 129 } 130 131 /* 132 * Convert a name-value pair list representing an FMRI authority into the 133 * corresponding RFC2396 string representation and return the new string. 134 */ 135 char * 136 fmd_fmri_auth2str(nvlist_t *nvl) 137 { 138 nvpair_t *nvp; 139 char *s, *p, *v; 140 size_t n = 0; 141 142 for (nvp = nvlist_next_nvpair(nvl, NULL); 143 nvp != NULL; nvp = nvlist_next_nvpair(nvl, nvp)) { 144 145 if (nvpair_type(nvp) != DATA_TYPE_STRING) 146 continue; /* do not format non-string elements */ 147 148 n += fmd_fmri_uriescape(nvpair_name(nvp), NULL, NULL, 0) + 1; 149 (void) nvpair_value_string(nvp, &v); 150 n += fmd_fmri_uriescape(v, ":", NULL, 0) + 1; 151 } 152 153 p = s = fmd_alloc(n, FMD_SLEEP); 154 155 for (nvp = nvlist_next_nvpair(nvl, NULL); 156 nvp != NULL; nvp = nvlist_next_nvpair(nvl, nvp)) { 157 158 if (nvpair_type(nvp) != DATA_TYPE_STRING) 159 continue; /* do not format non-string elements */ 160 161 if (p != s) 162 *p++ = ','; 163 164 p += fmd_fmri_uriescape(nvpair_name(nvp), NULL, p, n); 165 *p++ = '='; 166 (void) nvpair_value_string(nvp, &v); 167 p += fmd_fmri_uriescape(v, ":", p, n); 168 } 169 170 return (s); 171 } 172 173 /* 174 * Convert an input string to a URI escaped string and return the new string. 175 * We amend the unreserved character list to include commas and colons, 176 * as both are needed to make FMRIs readable without escaping. We also permit 177 * "/" to pass through unescaped as any path delimiters used by the event 178 * creator are presumably intended to appear in the final path. 179 */ 180 char * 181 fmd_fmri_strescape(const char *s) 182 { 183 char *s2; 184 size_t n; 185 186 if (s == NULL) 187 return (NULL); 188 189 n = fmd_fmri_uriescape(s, ":,/", NULL, 0); 190 s2 = fmd_alloc(n + 1, FMD_SLEEP); 191 (void) fmd_fmri_uriescape(s, ":,/", s2, n + 1); 192 193 return (s2); 194 } 195 196 char * 197 fmd_fmri_strdup(const char *s) 198 { 199 return (fmd_strdup(s, FMD_SLEEP)); 200 } 201 202 void 203 fmd_fmri_strfree(char *s) 204 { 205 fmd_strfree(s); 206 } 207 208 const char * 209 fmd_fmri_get_rootdir(void) 210 { 211 return (fmd.d_rootdir); 212 } 213 214 const char * 215 fmd_fmri_get_platform(void) 216 { 217 return (fmd.d_platform); 218 } 219 220 uint64_t 221 fmd_fmri_get_drgen(void) 222 { 223 uint64_t gen; 224 225 (void) pthread_mutex_lock(&fmd.d_stats_lock); 226 gen = fmd.d_stats->ds_dr_gen.fmds_value.ui64; 227 (void) pthread_mutex_unlock(&fmd.d_stats_lock); 228 229 return (gen); 230 } 231 232 /* 233 * Interfaces for users of the plugins 234 */ 235 236 static fmd_scheme_t * 237 nvl2scheme(nvlist_t *nvl) 238 { 239 char *name; 240 241 if (nvlist_lookup_string(nvl, FM_FMRI_SCHEME, &name) != 0) { 242 (void) fmd_set_errno(EFMD_FMRI_INVAL); 243 return (NULL); 244 } 245 246 return (fmd_scheme_hash_lookup(fmd.d_schemes, name)); 247 } 248 249 ssize_t 250 fmd_fmri_nvl2str(nvlist_t *nvl, char *buf, size_t buflen) 251 { 252 fmd_scheme_t *sp; 253 char c; 254 ssize_t rv; 255 256 if (buf == NULL && buflen == 0) { 257 buf = &c; 258 buflen = sizeof (c); 259 } 260 261 if ((sp = nvl2scheme(nvl)) == NULL) 262 return (-1); /* errno is set for us */ 263 264 (void) pthread_mutex_lock(&sp->sch_opslock); 265 ASSERT(buf != NULL || buflen == 0); 266 rv = sp->sch_ops.sop_nvl2str(nvl, buf, buflen); 267 (void) pthread_mutex_unlock(&sp->sch_opslock); 268 269 fmd_scheme_hash_release(fmd.d_schemes, sp); 270 return (rv); 271 } 272 273 int 274 fmd_fmri_expand(nvlist_t *nvl) 275 { 276 fmd_scheme_t *sp; 277 int rv; 278 279 if ((sp = nvl2scheme(nvl)) == NULL) 280 return (-1); /* errno is set for us */ 281 282 (void) pthread_mutex_lock(&sp->sch_opslock); 283 rv = sp->sch_ops.sop_expand(nvl); 284 (void) pthread_mutex_unlock(&sp->sch_opslock); 285 286 fmd_scheme_hash_release(fmd.d_schemes, sp); 287 return (rv); 288 } 289 290 int 291 fmd_fmri_present(nvlist_t *nvl) 292 { 293 fmd_scheme_t *sp; 294 int rv; 295 296 if ((sp = nvl2scheme(nvl)) == NULL) 297 return (-1); /* errno is set for us */ 298 299 (void) pthread_mutex_lock(&sp->sch_opslock); 300 rv = sp->sch_ops.sop_present(nvl); 301 (void) pthread_mutex_unlock(&sp->sch_opslock); 302 303 fmd_scheme_hash_release(fmd.d_schemes, sp); 304 return (rv); 305 } 306 307 int 308 fmd_fmri_unusable(nvlist_t *nvl) 309 { 310 fmd_scheme_t *sp; 311 int rv; 312 313 if ((sp = nvl2scheme(nvl)) == NULL) 314 return (-1); /* errno is set for us */ 315 316 (void) pthread_mutex_lock(&sp->sch_opslock); 317 rv = sp->sch_ops.sop_unusable(nvl); 318 (void) pthread_mutex_unlock(&sp->sch_opslock); 319 320 fmd_scheme_hash_release(fmd.d_schemes, sp); 321 return (rv); 322 } 323 324 int 325 fmd_fmri_contains(nvlist_t *er, nvlist_t *ee) 326 { 327 fmd_scheme_t *sp; 328 char *ername, *eename; 329 int rv; 330 331 if (nvlist_lookup_string(er, FM_FMRI_SCHEME, &ername) != 0 || 332 nvlist_lookup_string(ee, FM_FMRI_SCHEME, &eename) != 0 || 333 strcmp(ername, eename) != 0) 334 return (fmd_set_errno(EFMD_FMRI_INVAL)); 335 336 if ((sp = fmd_scheme_hash_lookup(fmd.d_schemes, ername)) == NULL) 337 return (-1); /* errno is set for us */ 338 339 (void) pthread_mutex_lock(&sp->sch_opslock); 340 rv = sp->sch_ops.sop_contains(er, ee); 341 (void) pthread_mutex_unlock(&sp->sch_opslock); 342 343 fmd_scheme_hash_release(fmd.d_schemes, sp); 344 return (rv); 345 } 346 347 nvlist_t * 348 fmd_fmri_translate(nvlist_t *fmri, nvlist_t *auth) 349 { 350 fmd_scheme_t *sp; 351 nvlist_t *nvl; 352 353 if ((sp = nvl2scheme(fmri)) == NULL) 354 return (NULL); /* errno is set for us */ 355 356 (void) pthread_mutex_lock(&sp->sch_opslock); 357 nvl = sp->sch_ops.sop_translate(fmri, auth); 358 (void) pthread_mutex_unlock(&sp->sch_opslock); 359 360 fmd_scheme_hash_release(fmd.d_schemes, sp); 361 return (nvl); 362 } 363