| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * Native-code portions of the project |
| 4 | * |
| 5 | * (c) 2018 Straylight/Edgeware |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 9 | * |
| 10 | * This file is part of the Trivial IP Encryption (TrIPE) Android app. |
| 11 | * |
| 12 | * TrIPE is free software: you can redistribute it and/or modify it under |
| 13 | * the terms of the GNU General Public License as published by the Free |
| 14 | * Software Foundation; either version 3 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | * |
| 17 | * TrIPE is distributed in the hope that it will be useful, but WITHOUT |
| 18 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 20 | * for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with TrIPE. If not, see <https://www.gnu.org/licenses/>. |
| 24 | */ |
| 25 | |
| 26 | /*----- Header files ------------------------------------------------------*/ |
| 27 | |
| 28 | #define _FILE_OFFSET_BITS 64 |
| 29 | |
| 30 | #include <assert.h> |
| 31 | #include <ctype.h> |
| 32 | #include <errno.h> |
| 33 | #include <inttypes.h> |
| 34 | #include <stdarg.h> |
| 35 | #include <stdio.h> |
| 36 | #include <stdlib.h> |
| 37 | #include <string.h> |
| 38 | |
| 39 | #include <jni.h> |
| 40 | |
| 41 | #include <sys/types.h> |
| 42 | #include <sys/socket.h> |
| 43 | #include <sys/stat.h> |
| 44 | #include <sys/sysmacros.h> |
| 45 | #include <sys/un.h> |
| 46 | #include <fcntl.h> |
| 47 | #include <unistd.h> |
| 48 | #include <dirent.h> |
| 49 | |
| 50 | #include <mLib/align.h> |
| 51 | #include <mLib/bits.h> |
| 52 | #include <mLib/dstr.h> |
| 53 | #include <mLib/macros.h> |
| 54 | |
| 55 | #include <catacomb/ghash.h> |
| 56 | |
| 57 | #undef sun |
| 58 | |
| 59 | /*----- Magic class names and similar -------------------------------------*/ |
| 60 | |
| 61 | /* The name decoration is horrific. Hide it. */ |
| 62 | #define JNIFUNC(f) Java_uk_org_distorted_tripe_sys_package_00024_##f |
| 63 | |
| 64 | /* The little class for bundling up error codes. */ |
| 65 | #define ERRENTRY "uk/org/distorted/tripe/sys/package$ErrorEntry" |
| 66 | |
| 67 | /* The `stat' class. */ |
| 68 | #define STAT "uk/org/distorted/tripe/sys/package$FileInfo" |
| 69 | |
| 70 | /* Exception class names. */ |
| 71 | #define NULLERR "java/lang/NullPointerException" |
| 72 | #define TYPEERR "uk/org/distorted/tripe/sys/package$NativeObjectTypeException" |
| 73 | #define SYSERR "uk/org/distorted/tripe/sys/package$SystemError" |
| 74 | #define ARGERR "java/lang/IllegalArgumentException" |
| 75 | #define BOUNDSERR "java/lang/IndexOutOfBoundsException" |
| 76 | |
| 77 | /*----- Miscellaneous utilities -------------------------------------------*/ |
| 78 | |
| 79 | static void put_cstring(JNIEnv *jni, jbyteArray v, const char *p) |
| 80 | { if (p) (*jni)->ReleaseByteArrayElements(jni, v, (jbyte *)p, JNI_ABORT); } |
| 81 | |
| 82 | static void vexcept(JNIEnv *jni, const char *clsname, |
| 83 | const char *msg, va_list *ap) |
| 84 | { |
| 85 | jclass cls; |
| 86 | int rc; |
| 87 | dstr d = DSTR_INIT; |
| 88 | |
| 89 | cls = (*jni)->FindClass(jni, clsname); assert(cls); |
| 90 | if (!msg) |
| 91 | rc = (*jni)->ThrowNew(jni, cls, 0); |
| 92 | else { |
| 93 | dstr_vputf(&d, msg, ap); |
| 94 | rc = (*jni)->ThrowNew(jni, cls, d.buf); |
| 95 | assert(!rc); |
| 96 | dstr_destroy(&d); |
| 97 | } |
| 98 | assert(!rc); |
| 99 | } |
| 100 | |
| 101 | static void except(JNIEnv *jni, const char *clsname, const char *msg, ...) |
| 102 | { |
| 103 | va_list ap; |
| 104 | |
| 105 | va_start(ap, msg); |
| 106 | vexcept(jni, clsname, msg, &ap); |
| 107 | va_end(ap); |
| 108 | } |
| 109 | |
| 110 | #ifdef DEBUG |
| 111 | static void dump_bytes(const void *p, size_t n, size_t o) |
| 112 | { |
| 113 | const unsigned char *q = p; |
| 114 | size_t i; |
| 115 | |
| 116 | if (!n) return; |
| 117 | for (;;) { |
| 118 | fprintf(stderr, ";; %08zx\n", o); |
| 119 | for (i = 0; i < 8; i++) |
| 120 | if (i < n) fprintf(stderr, "%02x ", q[i]); |
| 121 | else fprintf(stderr, "** "); |
| 122 | fprintf(stderr, ": "); |
| 123 | for (i = 0; i < 8; i++) |
| 124 | fputc(i >= n ? '*' : isprint(q[i]) ? q[i] : '.', stderr); |
| 125 | fputc('\n', stderr); |
| 126 | if (n <= 8) break; |
| 127 | q += 8; n -= 8; |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | static void dump_byte_array(JNIEnv *jni, const char *what, jbyteArray v) |
| 132 | { |
| 133 | jsize n; |
| 134 | jbyte *p; |
| 135 | |
| 136 | fprintf(stderr, ";; %s\n", what); |
| 137 | if (!v) { fprintf(stderr, ";; <null>\n"); return; } |
| 138 | n = (*jni)->GetArrayLength(jni, v); |
| 139 | p = (*jni)->GetByteArrayElements(jni, v, 0); |
| 140 | dump_bytes(p, n, 0); |
| 141 | (*jni)->ReleaseByteArrayElements(jni, v, p, JNI_ABORT); |
| 142 | } |
| 143 | #endif |
| 144 | |
| 145 | static jbyteArray wrap_cstring(JNIEnv *jni, const char *p) |
| 146 | { |
| 147 | size_t n; |
| 148 | jbyteArray v; |
| 149 | jbyte *q; |
| 150 | |
| 151 | if (!p) return (0); |
| 152 | n = strlen(p) + 1; |
| 153 | v = (*jni)->NewByteArray(jni, n); if (!v) return (0); |
| 154 | q = (*jni)->GetByteArrayElements(jni, v, 0); if (!q) return (0); |
| 155 | memcpy(q, p, n); |
| 156 | (*jni)->ReleaseByteArrayElements(jni, v, q, 0); |
| 157 | return (v); |
| 158 | } |
| 159 | |
| 160 | static const char *get_cstring(JNIEnv *jni, jbyteArray v) |
| 161 | { |
| 162 | if (!v) { except(jni, NULLERR, 0); return (0); } |
| 163 | return ((const char *)(*jni)->GetByteArrayElements(jni, v, 0)); |
| 164 | } |
| 165 | |
| 166 | static void vexcept_syserror(JNIEnv *jni, const char *clsname, |
| 167 | int err, const char *msg, va_list *ap) |
| 168 | { |
| 169 | jclass cls; |
| 170 | int rc; |
| 171 | dstr d = DSTR_INIT; |
| 172 | jbyteArray msgstr; |
| 173 | jthrowable e; |
| 174 | jmethodID init; |
| 175 | |
| 176 | cls = (*jni)->FindClass(jni, clsname); assert(cls); |
| 177 | init = (*jni)->GetMethodID(jni, cls, "<init>", "(I[B)V"); assert(init); |
| 178 | dstr_vputf(&d, msg, ap); |
| 179 | msgstr = wrap_cstring(jni, d.buf); assert(msgstr); |
| 180 | dstr_destroy(&d); |
| 181 | e = (*jni)->NewObject(jni, cls, init, err, msgstr); assert(e); |
| 182 | rc = (*jni)->Throw(jni, e); assert(!rc); |
| 183 | } |
| 184 | |
| 185 | static void except_syserror(JNIEnv *jni, const char *clsname, |
| 186 | int err, const char *msg, ...) |
| 187 | { |
| 188 | va_list ap; |
| 189 | |
| 190 | va_start(ap, msg); |
| 191 | vexcept_syserror(jni, clsname, err, msg, &ap); |
| 192 | va_end(ap); |
| 193 | } |
| 194 | |
| 195 | /*----- Wrapping native types ---------------------------------------------*/ |
| 196 | |
| 197 | /* There's no way defined in the JNI to stash a C pointer in a Java object. |
| 198 | * It seems that the usual approach is to cast to `jlong', but this is |
| 199 | * clearly unsatisfactory. Instead, we store structures as Java byte arrays, |
| 200 | * with a 32-bit tag on the front. |
| 201 | */ |
| 202 | |
| 203 | struct native_type { |
| 204 | const char *name; |
| 205 | size_t sz; |
| 206 | uint32 tag; |
| 207 | }; |
| 208 | |
| 209 | typedef jbyteArray wrapper; |
| 210 | |
| 211 | struct native_base { |
| 212 | uint32 tag; |
| 213 | }; |
| 214 | |
| 215 | static int unwrap(JNIEnv *jni, void *p, |
| 216 | const struct native_type *ty, wrapper w) |
| 217 | { |
| 218 | jbyte *q; |
| 219 | jclass cls; |
| 220 | struct native_base *b = p; |
| 221 | jsize n; |
| 222 | |
| 223 | if (!w) { except(jni, NULLERR, 0); return (-1); } |
| 224 | cls = (*jni)->FindClass(jni, "[B"); assert(cls); |
| 225 | if (!(*jni)->IsInstanceOf(jni, w, cls)) { |
| 226 | except(jni, TYPEERR, |
| 227 | "corrupted native object wrapper: expected a byte array"); |
| 228 | return (-1); |
| 229 | } |
| 230 | n = (*jni)->GetArrayLength(jni, w); |
| 231 | if (n != ty->sz) { |
| 232 | except(jni, TYPEERR, |
| 233 | "corrupted native object wrapper: wrong size for `%s'", |
| 234 | ty->name); |
| 235 | return (-1); |
| 236 | } |
| 237 | q = (*jni)->GetByteArrayElements(jni, w, 0); if (!q) return (-1); |
| 238 | memcpy(b, q, ty->sz); |
| 239 | (*jni)->ReleaseByteArrayElements(jni, w, q, JNI_ABORT); |
| 240 | if (b->tag != ty->tag) { |
| 241 | except(jni, TYPEERR, |
| 242 | "corrupted native object wrapper: expected tag for `%s'", |
| 243 | ty->name); |
| 244 | return (-1); |
| 245 | } |
| 246 | return (0); |
| 247 | } |
| 248 | |
| 249 | static int update_wrapper(JNIEnv *jni, const struct native_type *ty, |
| 250 | wrapper w, const void *p) |
| 251 | { |
| 252 | jbyte *q; |
| 253 | |
| 254 | q = (*jni)->GetByteArrayElements(jni, w, 0); if (!q) return (-1); |
| 255 | memcpy(q, p, ty->sz); |
| 256 | (*jni)->ReleaseByteArrayElements(jni, w, q, 0); |
| 257 | return (0); |
| 258 | } |
| 259 | |
| 260 | static wrapper wrap(JNIEnv *jni, const struct native_type *ty, const void *p) |
| 261 | { |
| 262 | wrapper w; |
| 263 | |
| 264 | w = (*jni)->NewByteArray(jni, ty->sz); if (!w) return (0); |
| 265 | if (update_wrapper(jni, ty, w, p)) return (0); |
| 266 | return (w); |
| 267 | } |
| 268 | |
| 269 | #define INIT_NATIVE(type, p) do (p)->_base.tag = type##_type.tag; while (0) |
| 270 | |
| 271 | /*----- Crypto information ------------------------------------------------*/ |
| 272 | |
| 273 | JNIEXPORT jint JNICALL JNIFUNC(hashsz)(JNIEnv *jni, jobject cls, |
| 274 | jstring hnamestr) |
| 275 | { |
| 276 | jint rc = -1; |
| 277 | const char *hname; |
| 278 | const gchash *hc; |
| 279 | |
| 280 | hname = (*jni)->GetStringUTFChars(jni, hnamestr, 0); |
| 281 | if (!hname) goto end; |
| 282 | hc = ghash_byname(hname); if (!hc) goto end; |
| 283 | rc = hc->hashsz; |
| 284 | |
| 285 | end: |
| 286 | if (hname) (*jni)->ReleaseStringUTFChars(jni, hnamestr, hname); |
| 287 | return (rc); |
| 288 | } |
| 289 | |
| 290 | /*----- System errors -----------------------------------------------------*/ |
| 291 | |
| 292 | static const struct errtab { const char *tag; int err; } errtab[] = { |
| 293 | /* |
| 294 | ;;; The errno name table is very boring to type. To make life less |
| 295 | ;;; awful, put the errno names in this list and evaluate the code to |
| 296 | ;;; get Emacs to regenerate it. |
| 297 | |
| 298 | (let ((errors '(EPERM ENOENT ESRCH EINTR EIO ENXIO E2BIG ENOEXEC EBADF |
| 299 | ECHILD EAGAIN ENOMEM EACCES EFAULT ENOTBLK EBUSY EEXIST |
| 300 | EXDEV ENODEV ENOTDIR EISDIR EINVAL ENFILE EMFILE ENOTTY |
| 301 | ETXTBSY EFBIG ENOSPC ESPIPE EROFS EMLINK EPIPE EDOM |
| 302 | ERANGE |
| 303 | |
| 304 | EDEADLK ENAMETOOLONG ENOLCK ENOSYS ENOTEMPTY ELOOP |
| 305 | EWOULDBLOCK ENOMSG EIDRM ECHRNG EL2NSYNC EL3HLT EL3RST |
| 306 | ELNRNG EUNATCH ENOCSI EL2HLT EBADE EBADR EXFULL ENOANO |
| 307 | EBADRQC EBADSLT EDEADLOCK EBFONT ENOSTR ENODATA ETIME |
| 308 | ENOSR ENONET ENOPKG EREMOTE ENOLINK EADV ESRMNT ECOMM |
| 309 | EPROTO EMULTIHOP EDOTDOT EBADMSG EOVERFLOW ENOTUNIQ |
| 310 | EBADFD EREMCHG ELIBACC ELIBBAD ELIBSCN ELIBMAX ELIBEXEC |
| 311 | EILSEQ ERESTART ESTRPIPE EUSERS ENOTSOCK EDESTADDRREQ |
| 312 | EMSGSIZE EPROTOTYPE ENOPROTOOPT EPROTONOSUPPORT |
| 313 | ESOCKTNOSUPPORT EOPNOTSUPP EPFNOSUPPORT EAFNOSUPPORT |
| 314 | EADDRINUSE EADDRNOTAVAIL ENETDOWN ENETUNREACH ENETRESET |
| 315 | ECONNABORTED ECONNRESET ENOBUFS EISCONN ENOTCONN |
| 316 | ESHUTDOWN ETOOMANYREFS ETIMEDOUT ECONNREFUSED EHOSTDOWN |
| 317 | EHOSTUNREACH EALREADY EINPROGRESS ESTALE EUCLEAN ENOTNAM |
| 318 | ENAVAIL EISNAM EREMOTEIO EDQUOT ENOMEDIUM EMEDIUMTYPE |
| 319 | ECANCELED ENOKEY EKEYEXPIRED EKEYREVOKED EKEYREJECTED |
| 320 | EOWNERDEAD ENOTRECOVERABLE ERFKILL EHWPOISON))) |
| 321 | (save-excursion |
| 322 | (goto-char (point-min)) |
| 323 | (search-forward (concat "***" "BEGIN errtab" "***")) |
| 324 | (beginning-of-line 2) |
| 325 | (delete-region (point) |
| 326 | (progn |
| 327 | (search-forward "***END***") |
| 328 | (beginning-of-line) |
| 329 | (point))) |
| 330 | (dolist (err errors) |
| 331 | (insert (format "#ifdef %s\n { \"%s\", %s },\n#endif\n" |
| 332 | err err err))))) |
| 333 | */ |
| 334 | /***BEGIN errtab***/ |
| 335 | #ifdef EPERM |
| 336 | { "EPERM", EPERM }, |
| 337 | #endif |
| 338 | #ifdef ENOENT |
| 339 | { "ENOENT", ENOENT }, |
| 340 | #endif |
| 341 | #ifdef ESRCH |
| 342 | { "ESRCH", ESRCH }, |
| 343 | #endif |
| 344 | #ifdef EINTR |
| 345 | { "EINTR", EINTR }, |
| 346 | #endif |
| 347 | #ifdef EIO |
| 348 | { "EIO", EIO }, |
| 349 | #endif |
| 350 | #ifdef ENXIO |
| 351 | { "ENXIO", ENXIO }, |
| 352 | #endif |
| 353 | #ifdef E2BIG |
| 354 | { "E2BIG", E2BIG }, |
| 355 | #endif |
| 356 | #ifdef ENOEXEC |
| 357 | { "ENOEXEC", ENOEXEC }, |
| 358 | #endif |
| 359 | #ifdef EBADF |
| 360 | { "EBADF", EBADF }, |
| 361 | #endif |
| 362 | #ifdef ECHILD |
| 363 | { "ECHILD", ECHILD }, |
| 364 | #endif |
| 365 | #ifdef EAGAIN |
| 366 | { "EAGAIN", EAGAIN }, |
| 367 | #endif |
| 368 | #ifdef ENOMEM |
| 369 | { "ENOMEM", ENOMEM }, |
| 370 | #endif |
| 371 | #ifdef EACCES |
| 372 | { "EACCES", EACCES }, |
| 373 | #endif |
| 374 | #ifdef EFAULT |
| 375 | { "EFAULT", EFAULT }, |
| 376 | #endif |
| 377 | #ifdef ENOTBLK |
| 378 | { "ENOTBLK", ENOTBLK }, |
| 379 | #endif |
| 380 | #ifdef EBUSY |
| 381 | { "EBUSY", EBUSY }, |
| 382 | #endif |
| 383 | #ifdef EEXIST |
| 384 | { "EEXIST", EEXIST }, |
| 385 | #endif |
| 386 | #ifdef EXDEV |
| 387 | { "EXDEV", EXDEV }, |
| 388 | #endif |
| 389 | #ifdef ENODEV |
| 390 | { "ENODEV", ENODEV }, |
| 391 | #endif |
| 392 | #ifdef ENOTDIR |
| 393 | { "ENOTDIR", ENOTDIR }, |
| 394 | #endif |
| 395 | #ifdef EISDIR |
| 396 | { "EISDIR", EISDIR }, |
| 397 | #endif |
| 398 | #ifdef EINVAL |
| 399 | { "EINVAL", EINVAL }, |
| 400 | #endif |
| 401 | #ifdef ENFILE |
| 402 | { "ENFILE", ENFILE }, |
| 403 | #endif |
| 404 | #ifdef EMFILE |
| 405 | { "EMFILE", EMFILE }, |
| 406 | #endif |
| 407 | #ifdef ENOTTY |
| 408 | { "ENOTTY", ENOTTY }, |
| 409 | #endif |
| 410 | #ifdef ETXTBSY |
| 411 | { "ETXTBSY", ETXTBSY }, |
| 412 | #endif |
| 413 | #ifdef EFBIG |
| 414 | { "EFBIG", EFBIG }, |
| 415 | #endif |
| 416 | #ifdef ENOSPC |
| 417 | { "ENOSPC", ENOSPC }, |
| 418 | #endif |
| 419 | #ifdef ESPIPE |
| 420 | { "ESPIPE", ESPIPE }, |
| 421 | #endif |
| 422 | #ifdef EROFS |
| 423 | { "EROFS", EROFS }, |
| 424 | #endif |
| 425 | #ifdef EMLINK |
| 426 | { "EMLINK", EMLINK }, |
| 427 | #endif |
| 428 | #ifdef EPIPE |
| 429 | { "EPIPE", EPIPE }, |
| 430 | #endif |
| 431 | #ifdef EDOM |
| 432 | { "EDOM", EDOM }, |
| 433 | #endif |
| 434 | #ifdef ERANGE |
| 435 | { "ERANGE", ERANGE }, |
| 436 | #endif |
| 437 | #ifdef EDEADLK |
| 438 | { "EDEADLK", EDEADLK }, |
| 439 | #endif |
| 440 | #ifdef ENAMETOOLONG |
| 441 | { "ENAMETOOLONG", ENAMETOOLONG }, |
| 442 | #endif |
| 443 | #ifdef ENOLCK |
| 444 | { "ENOLCK", ENOLCK }, |
| 445 | #endif |
| 446 | #ifdef ENOSYS |
| 447 | { "ENOSYS", ENOSYS }, |
| 448 | #endif |
| 449 | #ifdef ENOTEMPTY |
| 450 | { "ENOTEMPTY", ENOTEMPTY }, |
| 451 | #endif |
| 452 | #ifdef ELOOP |
| 453 | { "ELOOP", ELOOP }, |
| 454 | #endif |
| 455 | #ifdef EWOULDBLOCK |
| 456 | { "EWOULDBLOCK", EWOULDBLOCK }, |
| 457 | #endif |
| 458 | #ifdef ENOMSG |
| 459 | { "ENOMSG", ENOMSG }, |
| 460 | #endif |
| 461 | #ifdef EIDRM |
| 462 | { "EIDRM", EIDRM }, |
| 463 | #endif |
| 464 | #ifdef ECHRNG |
| 465 | { "ECHRNG", ECHRNG }, |
| 466 | #endif |
| 467 | #ifdef EL2NSYNC |
| 468 | { "EL2NSYNC", EL2NSYNC }, |
| 469 | #endif |
| 470 | #ifdef EL3HLT |
| 471 | { "EL3HLT", EL3HLT }, |
| 472 | #endif |
| 473 | #ifdef EL3RST |
| 474 | { "EL3RST", EL3RST }, |
| 475 | #endif |
| 476 | #ifdef ELNRNG |
| 477 | { "ELNRNG", ELNRNG }, |
| 478 | #endif |
| 479 | #ifdef EUNATCH |
| 480 | { "EUNATCH", EUNATCH }, |
| 481 | #endif |
| 482 | #ifdef ENOCSI |
| 483 | { "ENOCSI", ENOCSI }, |
| 484 | #endif |
| 485 | #ifdef EL2HLT |
| 486 | { "EL2HLT", EL2HLT }, |
| 487 | #endif |
| 488 | #ifdef EBADE |
| 489 | { "EBADE", EBADE }, |
| 490 | #endif |
| 491 | #ifdef EBADR |
| 492 | { "EBADR", EBADR }, |
| 493 | #endif |
| 494 | #ifdef EXFULL |
| 495 | { "EXFULL", EXFULL }, |
| 496 | #endif |
| 497 | #ifdef ENOANO |
| 498 | { "ENOANO", ENOANO }, |
| 499 | #endif |
| 500 | #ifdef EBADRQC |
| 501 | { "EBADRQC", EBADRQC }, |
| 502 | #endif |
| 503 | #ifdef EBADSLT |
| 504 | { "EBADSLT", EBADSLT }, |
| 505 | #endif |
| 506 | #ifdef EDEADLOCK |
| 507 | { "EDEADLOCK", EDEADLOCK }, |
| 508 | #endif |
| 509 | #ifdef EBFONT |
| 510 | { "EBFONT", EBFONT }, |
| 511 | #endif |
| 512 | #ifdef ENOSTR |
| 513 | { "ENOSTR", ENOSTR }, |
| 514 | #endif |
| 515 | #ifdef ENODATA |
| 516 | { "ENODATA", ENODATA }, |
| 517 | #endif |
| 518 | #ifdef ETIME |
| 519 | { "ETIME", ETIME }, |
| 520 | #endif |
| 521 | #ifdef ENOSR |
| 522 | { "ENOSR", ENOSR }, |
| 523 | #endif |
| 524 | #ifdef ENONET |
| 525 | { "ENONET", ENONET }, |
| 526 | #endif |
| 527 | #ifdef ENOPKG |
| 528 | { "ENOPKG", ENOPKG }, |
| 529 | #endif |
| 530 | #ifdef EREMOTE |
| 531 | { "EREMOTE", EREMOTE }, |
| 532 | #endif |
| 533 | #ifdef ENOLINK |
| 534 | { "ENOLINK", ENOLINK }, |
| 535 | #endif |
| 536 | #ifdef EADV |
| 537 | { "EADV", EADV }, |
| 538 | #endif |
| 539 | #ifdef ESRMNT |
| 540 | { "ESRMNT", ESRMNT }, |
| 541 | #endif |
| 542 | #ifdef ECOMM |
| 543 | { "ECOMM", ECOMM }, |
| 544 | #endif |
| 545 | #ifdef EPROTO |
| 546 | { "EPROTO", EPROTO }, |
| 547 | #endif |
| 548 | #ifdef EMULTIHOP |
| 549 | { "EMULTIHOP", EMULTIHOP }, |
| 550 | #endif |
| 551 | #ifdef EDOTDOT |
| 552 | { "EDOTDOT", EDOTDOT }, |
| 553 | #endif |
| 554 | #ifdef EBADMSG |
| 555 | { "EBADMSG", EBADMSG }, |
| 556 | #endif |
| 557 | #ifdef EOVERFLOW |
| 558 | { "EOVERFLOW", EOVERFLOW }, |
| 559 | #endif |
| 560 | #ifdef ENOTUNIQ |
| 561 | { "ENOTUNIQ", ENOTUNIQ }, |
| 562 | #endif |
| 563 | #ifdef EBADFD |
| 564 | { "EBADFD", EBADFD }, |
| 565 | #endif |
| 566 | #ifdef EREMCHG |
| 567 | { "EREMCHG", EREMCHG }, |
| 568 | #endif |
| 569 | #ifdef ELIBACC |
| 570 | { "ELIBACC", ELIBACC }, |
| 571 | #endif |
| 572 | #ifdef ELIBBAD |
| 573 | { "ELIBBAD", ELIBBAD }, |
| 574 | #endif |
| 575 | #ifdef ELIBSCN |
| 576 | { "ELIBSCN", ELIBSCN }, |
| 577 | #endif |
| 578 | #ifdef ELIBMAX |
| 579 | { "ELIBMAX", ELIBMAX }, |
| 580 | #endif |
| 581 | #ifdef ELIBEXEC |
| 582 | { "ELIBEXEC", ELIBEXEC }, |
| 583 | #endif |
| 584 | #ifdef EILSEQ |
| 585 | { "EILSEQ", EILSEQ }, |
| 586 | #endif |
| 587 | #ifdef ERESTART |
| 588 | { "ERESTART", ERESTART }, |
| 589 | #endif |
| 590 | #ifdef ESTRPIPE |
| 591 | { "ESTRPIPE", ESTRPIPE }, |
| 592 | #endif |
| 593 | #ifdef EUSERS |
| 594 | { "EUSERS", EUSERS }, |
| 595 | #endif |
| 596 | #ifdef ENOTSOCK |
| 597 | { "ENOTSOCK", ENOTSOCK }, |
| 598 | #endif |
| 599 | #ifdef EDESTADDRREQ |
| 600 | { "EDESTADDRREQ", EDESTADDRREQ }, |
| 601 | #endif |
| 602 | #ifdef EMSGSIZE |
| 603 | { "EMSGSIZE", EMSGSIZE }, |
| 604 | #endif |
| 605 | #ifdef EPROTOTYPE |
| 606 | { "EPROTOTYPE", EPROTOTYPE }, |
| 607 | #endif |
| 608 | #ifdef ENOPROTOOPT |
| 609 | { "ENOPROTOOPT", ENOPROTOOPT }, |
| 610 | #endif |
| 611 | #ifdef EPROTONOSUPPORT |
| 612 | { "EPROTONOSUPPORT", EPROTONOSUPPORT }, |
| 613 | #endif |
| 614 | #ifdef ESOCKTNOSUPPORT |
| 615 | { "ESOCKTNOSUPPORT", ESOCKTNOSUPPORT }, |
| 616 | #endif |
| 617 | #ifdef EOPNOTSUPP |
| 618 | { "EOPNOTSUPP", EOPNOTSUPP }, |
| 619 | #endif |
| 620 | #ifdef EPFNOSUPPORT |
| 621 | { "EPFNOSUPPORT", EPFNOSUPPORT }, |
| 622 | #endif |
| 623 | #ifdef EAFNOSUPPORT |
| 624 | { "EAFNOSUPPORT", EAFNOSUPPORT }, |
| 625 | #endif |
| 626 | #ifdef EADDRINUSE |
| 627 | { "EADDRINUSE", EADDRINUSE }, |
| 628 | #endif |
| 629 | #ifdef EADDRNOTAVAIL |
| 630 | { "EADDRNOTAVAIL", EADDRNOTAVAIL }, |
| 631 | #endif |
| 632 | #ifdef ENETDOWN |
| 633 | { "ENETDOWN", ENETDOWN }, |
| 634 | #endif |
| 635 | #ifdef ENETUNREACH |
| 636 | { "ENETUNREACH", ENETUNREACH }, |
| 637 | #endif |
| 638 | #ifdef ENETRESET |
| 639 | { "ENETRESET", ENETRESET }, |
| 640 | #endif |
| 641 | #ifdef ECONNABORTED |
| 642 | { "ECONNABORTED", ECONNABORTED }, |
| 643 | #endif |
| 644 | #ifdef ECONNRESET |
| 645 | { "ECONNRESET", ECONNRESET }, |
| 646 | #endif |
| 647 | #ifdef ENOBUFS |
| 648 | { "ENOBUFS", ENOBUFS }, |
| 649 | #endif |
| 650 | #ifdef EISCONN |
| 651 | { "EISCONN", EISCONN }, |
| 652 | #endif |
| 653 | #ifdef ENOTCONN |
| 654 | { "ENOTCONN", ENOTCONN }, |
| 655 | #endif |
| 656 | #ifdef ESHUTDOWN |
| 657 | { "ESHUTDOWN", ESHUTDOWN }, |
| 658 | #endif |
| 659 | #ifdef ETOOMANYREFS |
| 660 | { "ETOOMANYREFS", ETOOMANYREFS }, |
| 661 | #endif |
| 662 | #ifdef ETIMEDOUT |
| 663 | { "ETIMEDOUT", ETIMEDOUT }, |
| 664 | #endif |
| 665 | #ifdef ECONNREFUSED |
| 666 | { "ECONNREFUSED", ECONNREFUSED }, |
| 667 | #endif |
| 668 | #ifdef EHOSTDOWN |
| 669 | { "EHOSTDOWN", EHOSTDOWN }, |
| 670 | #endif |
| 671 | #ifdef EHOSTUNREACH |
| 672 | { "EHOSTUNREACH", EHOSTUNREACH }, |
| 673 | #endif |
| 674 | #ifdef EALREADY |
| 675 | { "EALREADY", EALREADY }, |
| 676 | #endif |
| 677 | #ifdef EINPROGRESS |
| 678 | { "EINPROGRESS", EINPROGRESS }, |
| 679 | #endif |
| 680 | #ifdef ESTALE |
| 681 | { "ESTALE", ESTALE }, |
| 682 | #endif |
| 683 | #ifdef EUCLEAN |
| 684 | { "EUCLEAN", EUCLEAN }, |
| 685 | #endif |
| 686 | #ifdef ENOTNAM |
| 687 | { "ENOTNAM", ENOTNAM }, |
| 688 | #endif |
| 689 | #ifdef ENAVAIL |
| 690 | { "ENAVAIL", ENAVAIL }, |
| 691 | #endif |
| 692 | #ifdef EISNAM |
| 693 | { "EISNAM", EISNAM }, |
| 694 | #endif |
| 695 | #ifdef EREMOTEIO |
| 696 | { "EREMOTEIO", EREMOTEIO }, |
| 697 | #endif |
| 698 | #ifdef EDQUOT |
| 699 | { "EDQUOT", EDQUOT }, |
| 700 | #endif |
| 701 | #ifdef ENOMEDIUM |
| 702 | { "ENOMEDIUM", ENOMEDIUM }, |
| 703 | #endif |
| 704 | #ifdef EMEDIUMTYPE |
| 705 | { "EMEDIUMTYPE", EMEDIUMTYPE }, |
| 706 | #endif |
| 707 | #ifdef ECANCELED |
| 708 | { "ECANCELED", ECANCELED }, |
| 709 | #endif |
| 710 | #ifdef ENOKEY |
| 711 | { "ENOKEY", ENOKEY }, |
| 712 | #endif |
| 713 | #ifdef EKEYEXPIRED |
| 714 | { "EKEYEXPIRED", EKEYEXPIRED }, |
| 715 | #endif |
| 716 | #ifdef EKEYREVOKED |
| 717 | { "EKEYREVOKED", EKEYREVOKED }, |
| 718 | #endif |
| 719 | #ifdef EKEYREJECTED |
| 720 | { "EKEYREJECTED", EKEYREJECTED }, |
| 721 | #endif |
| 722 | #ifdef EOWNERDEAD |
| 723 | { "EOWNERDEAD", EOWNERDEAD }, |
| 724 | #endif |
| 725 | #ifdef ENOTRECOVERABLE |
| 726 | { "ENOTRECOVERABLE", ENOTRECOVERABLE }, |
| 727 | #endif |
| 728 | #ifdef ERFKILL |
| 729 | { "ERFKILL", ERFKILL }, |
| 730 | #endif |
| 731 | #ifdef EHWPOISON |
| 732 | { "EHWPOISON", EHWPOISON }, |
| 733 | #endif |
| 734 | /***END***/ |
| 735 | }; |
| 736 | |
| 737 | JNIEXPORT jobject JNIFUNC(errtab)(JNIEnv *jni, jobject cls) |
| 738 | { |
| 739 | size_t i; |
| 740 | jclass eltcls; |
| 741 | jarray v; |
| 742 | jmethodID init; |
| 743 | jobject e; |
| 744 | |
| 745 | eltcls = |
| 746 | (*jni)->FindClass(jni, ERRENTRY); |
| 747 | assert(eltcls); |
| 748 | v = (*jni)->NewObjectArray(jni, N(errtab), eltcls, 0); if (!v) return (0); |
| 749 | init = (*jni)->GetMethodID(jni, eltcls, "<init>", |
| 750 | "(Ljava/lang/String;I)V"); |
| 751 | assert(init); |
| 752 | |
| 753 | for (i = 0; i < N(errtab); i++) { |
| 754 | e = (*jni)->NewObject(jni, eltcls, init, |
| 755 | (*jni)->NewStringUTF(jni, errtab[i].tag), |
| 756 | errtab[i].err); |
| 757 | (*jni)->SetObjectArrayElement(jni, v, i, e); |
| 758 | } |
| 759 | return (v); |
| 760 | } |
| 761 | |
| 762 | JNIEXPORT jobject JNIFUNC(strerror)(JNIEnv *jni, jobject cls, jint err) |
| 763 | { return (wrap_cstring(jni, strerror(err))); } |
| 764 | |
| 765 | /*----- Messing with file descriptors -------------------------------------*/ |
| 766 | |
| 767 | static void fdguts(JNIEnv *jni, jclass *cls, jfieldID *fid) |
| 768 | { |
| 769 | *cls = (*jni)->FindClass(jni, "java/io/FileDescriptor"); assert(cls); |
| 770 | *fid = (*jni)->GetFieldID(jni, *cls, "fd", "I"); // OpenJDK |
| 771 | if (!*fid) *fid = (*jni)->GetFieldID(jni, *cls, "descriptor", "I"); // Android |
| 772 | assert(*fid); |
| 773 | } |
| 774 | |
| 775 | static int fdint(JNIEnv *jni, jobject jfd) |
| 776 | { |
| 777 | jclass cls; |
| 778 | jfieldID fid; |
| 779 | |
| 780 | fdguts(jni, &cls, &fid); |
| 781 | return ((*jni)->GetIntField(jni, jfd, fid)); |
| 782 | } |
| 783 | |
| 784 | static jobject newfd(JNIEnv *jni, int fd) |
| 785 | { |
| 786 | jobject jfd; |
| 787 | jclass cls; |
| 788 | jmethodID init; |
| 789 | jfieldID fid; |
| 790 | |
| 791 | fdguts(jni, &cls, &fid); |
| 792 | init = (*jni)->GetMethodID(jni, cls, "<init>", "()V"); assert(init); |
| 793 | jfd = (*jni)->NewObject(jni, cls, init); |
| 794 | (*jni)->SetIntField(jni, jfd, fid, fd); |
| 795 | return (jfd); |
| 796 | } |
| 797 | |
| 798 | JNIEXPORT jint JNIFUNC(fdint)(JNIEnv *jni, jobject cls, jobject jfd) |
| 799 | { return (fdint(jni, jfd)); } |
| 800 | |
| 801 | JNIEXPORT jobject JNIFUNC(newfd)(JNIEnv *jni, jobject cls, jint fd) |
| 802 | { return (newfd(jni, fd)); } |
| 803 | |
| 804 | JNIEXPORT jboolean JNIFUNC(isatty)(JNIEnv *jni, jobject cls, jobject jfd) |
| 805 | { return (isatty(fdint(jni, jfd))); } |
| 806 | |
| 807 | /*----- Low-level file operations -----------------------------------------*/ |
| 808 | |
| 809 | /* Java has these already, as methods on `java.io.File' objects. Alas, these |
| 810 | * methods are useless at reporting errors: they tend to return a `boolean' |
| 811 | * success/ fail indicator, and throw away any more detailed information. |
| 812 | * There's better functionality in `java.nio.file.Files', but that only turns |
| 813 | * up in Android API 26 (in 7.0 Nougat). There's `android.system.Os', which |
| 814 | * has a bunch of POSIX-shaped functions -- but they're only in Android API |
| 815 | * 21 (in 5.0 Lollipop), and there's nothing in the support library to help. |
| 816 | * |
| 817 | * So the other option is to implement them ourselves. |
| 818 | */ |
| 819 | |
| 820 | JNIEXPORT void JNIFUNC(unlink)(JNIEnv *jni, jobject cls, jobject path) |
| 821 | { |
| 822 | const char *pathstr = 0; |
| 823 | |
| 824 | pathstr = get_cstring(jni, path); if (!pathstr) goto end; |
| 825 | if (unlink(pathstr)) { |
| 826 | except_syserror(jni, SYSERR, errno, |
| 827 | "failed to delete file `%s'", pathstr); |
| 828 | goto end; |
| 829 | } |
| 830 | end: |
| 831 | put_cstring(jni, path, pathstr); |
| 832 | } |
| 833 | |
| 834 | JNIEXPORT void JNIFUNC(rmdir)(JNIEnv *jni, jobject cls, jobject path) |
| 835 | { |
| 836 | const char *pathstr = 0; |
| 837 | |
| 838 | pathstr = get_cstring(jni, path); if (!pathstr) goto end; |
| 839 | if (rmdir(pathstr)) { |
| 840 | except_syserror(jni, SYSERR, errno, |
| 841 | "failed to delete directory `%s'", pathstr); |
| 842 | goto end; |
| 843 | } |
| 844 | end: |
| 845 | put_cstring(jni, path, pathstr); |
| 846 | } |
| 847 | |
| 848 | JNIEXPORT void JNIFUNC(mkdir)(JNIEnv *jni, jobject cls, |
| 849 | jobject path, jint mode) |
| 850 | { |
| 851 | const char *pathstr = 0; |
| 852 | |
| 853 | pathstr = get_cstring(jni, path); if (!pathstr) goto end; |
| 854 | if (mkdir(pathstr, mode)) { |
| 855 | except_syserror(jni, SYSERR, errno, |
| 856 | "failed to create directory `%s'", pathstr); |
| 857 | goto end; |
| 858 | } |
| 859 | end: |
| 860 | put_cstring(jni, path, pathstr); |
| 861 | } |
| 862 | |
| 863 | JNIEXPORT void JNIFUNC(mkfile)(JNIEnv *jni, jobject cls, |
| 864 | jobject path, jint mode) |
| 865 | { |
| 866 | const char *pathstr = 0; |
| 867 | int fd = -1; |
| 868 | |
| 869 | pathstr = get_cstring(jni, path); if (!pathstr) goto end; |
| 870 | fd = open(pathstr, O_WRONLY | O_CREAT | O_EXCL, mode); |
| 871 | if (fd < 0) { |
| 872 | except_syserror(jni, SYSERR, errno, |
| 873 | "failed to create fresh file `%s'", pathstr); |
| 874 | goto end; |
| 875 | } |
| 876 | end: |
| 877 | if (fd != -1) close(fd); |
| 878 | put_cstring(jni, path, pathstr); |
| 879 | } |
| 880 | |
| 881 | JNIEXPORT void JNIFUNC(rename)(JNIEnv *jni, jobject cls, |
| 882 | jobject from, jobject to) |
| 883 | { |
| 884 | const char *fromstr = 0, *tostr = 0; |
| 885 | |
| 886 | fromstr = get_cstring(jni, from); if (!fromstr) goto end; |
| 887 | tostr = get_cstring(jni, to); if (!tostr) goto end; |
| 888 | if (rename(fromstr, tostr)) { |
| 889 | except_syserror(jni, SYSERR, errno, |
| 890 | "failed to rename `%s' as `%s'", fromstr, tostr); |
| 891 | goto end; |
| 892 | } |
| 893 | end: |
| 894 | put_cstring(jni, from, fromstr); |
| 895 | put_cstring(jni, to, tostr); |
| 896 | } |
| 897 | |
| 898 | #define LKF_EXCL 0x1000u |
| 899 | #define LKF_WAIT 0x2000u |
| 900 | struct lockf { |
| 901 | struct native_base _base; |
| 902 | int fd; |
| 903 | }; |
| 904 | static struct native_type lockf_type = |
| 905 | { "lock", sizeof(struct lockf), 0xb2648926}; |
| 906 | JNIEXPORT wrapper JNIFUNC(lock)(JNIEnv *jni, jobject cls, |
| 907 | jobject path, jint flags) |
| 908 | { |
| 909 | const char *pathstr = 0; |
| 910 | int fd = -1; |
| 911 | struct flock l; |
| 912 | struct lockf lk; |
| 913 | struct stat st0, st1; |
| 914 | int f; |
| 915 | wrapper r = 0; |
| 916 | |
| 917 | pathstr = get_cstring(jni, path); if (!pathstr) goto end; |
| 918 | |
| 919 | again: |
| 920 | fd = open(pathstr, O_RDWR | O_CREAT, flags&07777); if (fd < 0) goto err; |
| 921 | if (fstat(fd, &st0)) goto err; |
| 922 | f = fcntl(fd, F_GETFD); if (f < 0) goto err; |
| 923 | if (fcntl(fd, F_SETFD, f | FD_CLOEXEC)) goto err; |
| 924 | l.l_type = (flags&LKF_EXCL) ? F_WRLCK : F_RDLCK; |
| 925 | l.l_whence = SEEK_SET; |
| 926 | l.l_start = 0; |
| 927 | l.l_len = 0; |
| 928 | if (fcntl(fd, (flags&LKF_WAIT) ? F_SETLKW : F_SETLK, &l)) goto err; |
| 929 | if (stat(pathstr, &st1)) |
| 930 | { if (errno == ENOENT) goto again; else goto err; } |
| 931 | if (st0.st_dev != st1.st_dev || st0.st_ino != st1.st_ino) |
| 932 | { close(fd); fd = -1; goto again; } |
| 933 | |
| 934 | INIT_NATIVE(lockf, &lk); lk.fd = fd; fd = -1; |
| 935 | r = wrap(jni, &lockf_type, &lk); |
| 936 | goto end; |
| 937 | |
| 938 | err: |
| 939 | except_syserror(jni, SYSERR, errno, "failed to lock file `%s'", pathstr); |
| 940 | end: |
| 941 | if (fd != -1) close(fd); |
| 942 | put_cstring(jni, path, pathstr); |
| 943 | return (r); |
| 944 | } |
| 945 | |
| 946 | JNIEXPORT void JNIFUNC(unlock)(JNIEnv *jni, jobject cls, wrapper wlk) |
| 947 | { |
| 948 | struct lockf lk; |
| 949 | struct flock l; |
| 950 | int rc; |
| 951 | |
| 952 | if (unwrap(jni, &lk, &lockf_type, wlk)) goto end; |
| 953 | if (lk.fd == -1) goto end; |
| 954 | l.l_type = F_UNLCK; |
| 955 | l.l_whence = SEEK_SET; |
| 956 | l.l_start = 0; |
| 957 | l.l_len = 0; |
| 958 | if (fcntl(lk.fd, F_SETLK, &l)) goto end; |
| 959 | close(lk.fd); lk.fd = -1; |
| 960 | rc = update_wrapper(jni, &lockf_type, wlk, &lk); assert(!rc); |
| 961 | end:; |
| 962 | } |
| 963 | |
| 964 | static jlong xlttimespec(const struct timespec *ts) |
| 965 | { return (1000*(jlong)ts->tv_sec + ts->tv_nsec/1000000); } |
| 966 | |
| 967 | static jobject xltstat(JNIEnv *jni, const struct stat *st) |
| 968 | { |
| 969 | jclass cls; |
| 970 | jmethodID init; |
| 971 | jint modehack; |
| 972 | |
| 973 | modehack = st->st_mode&07777; |
| 974 | if (S_ISFIFO(st->st_mode)) modehack |= 0010000; |
| 975 | else if (S_ISCHR(st->st_mode)) modehack |= 0020000; |
| 976 | else if (S_ISDIR(st->st_mode)) modehack |= 0040000; |
| 977 | else if (S_ISBLK(st->st_mode)) modehack |= 0060000; |
| 978 | else if (S_ISREG(st->st_mode)) modehack |= 0100000; |
| 979 | else if (S_ISLNK(st->st_mode)) modehack |= 0120000; |
| 980 | else if (S_ISSOCK(st->st_mode)) modehack |= 0140000; |
| 981 | |
| 982 | cls = (*jni)->FindClass(jni, STAT); assert(cls); |
| 983 | init = (*jni)->GetMethodID(jni, cls, "<init>", "(IIJIIIIIIJIJJJJ)V"); |
| 984 | assert(init); |
| 985 | return ((*jni)->NewObject(jni, cls, init, |
| 986 | (jint)major(st->st_dev), (jint)minor(st->st_dev), |
| 987 | (jlong)st->st_ino, |
| 988 | modehack, |
| 989 | (jint)st->st_nlink, |
| 990 | (jint)st->st_uid, (jint)st->st_gid, |
| 991 | (jint)major(st->st_rdev), (jint)minor(st->st_rdev), |
| 992 | (jlong)st->st_size, |
| 993 | (jint)st->st_blksize, (jlong)st->st_blocks, |
| 994 | xlttimespec(&st->st_atim), |
| 995 | xlttimespec(&st->st_mtim), |
| 996 | xlttimespec(&st->st_ctim))); |
| 997 | } |
| 998 | |
| 999 | JNIEXPORT jobject JNIFUNC(stat)(JNIEnv *jni, jobject cls, jobject path) |
| 1000 | { |
| 1001 | jobject r = 0; |
| 1002 | const char *pathstr = 0; |
| 1003 | struct stat st; |
| 1004 | |
| 1005 | pathstr = get_cstring(jni, path); if (!pathstr) goto end; |
| 1006 | if (stat(pathstr, &st)) { |
| 1007 | except_syserror(jni, SYSERR, errno, |
| 1008 | "failed to read information about `%s'", pathstr); |
| 1009 | goto end; |
| 1010 | } |
| 1011 | r = xltstat(jni, &st); |
| 1012 | end: |
| 1013 | put_cstring(jni, path, pathstr); |
| 1014 | return (r); |
| 1015 | } |
| 1016 | |
| 1017 | JNIEXPORT jobject JNIFUNC(lstat)(JNIEnv *jni, jobject cls, jobject path) |
| 1018 | { |
| 1019 | jobject r = 0; |
| 1020 | const char *pathstr = 0; |
| 1021 | struct stat st; |
| 1022 | |
| 1023 | pathstr = get_cstring(jni, path); if (!pathstr) goto end; |
| 1024 | if (lstat(pathstr, &st)) { |
| 1025 | except_syserror(jni, SYSERR, errno, |
| 1026 | "failed to read information about `%s'", pathstr); |
| 1027 | goto end; |
| 1028 | } |
| 1029 | r = xltstat(jni, &st); |
| 1030 | end: |
| 1031 | put_cstring(jni, path, pathstr); |
| 1032 | return (r); |
| 1033 | } |
| 1034 | |
| 1035 | struct dir { |
| 1036 | struct native_base _base; |
| 1037 | DIR *d; |
| 1038 | }; |
| 1039 | static const struct native_type dir_type = |
| 1040 | { "dir", sizeof(struct dir), 0x0f5ca477 }; |
| 1041 | |
| 1042 | JNIEXPORT jobject JNIFUNC(opendir)(JNIEnv *jni, jobject cls, jobject path) |
| 1043 | { |
| 1044 | const char *pathstr = 0; |
| 1045 | struct dir dir; |
| 1046 | wrapper r = 0; |
| 1047 | |
| 1048 | pathstr = get_cstring(jni, path); if (!pathstr) goto end; |
| 1049 | INIT_NATIVE(dir, &dir); |
| 1050 | dir.d = opendir(pathstr); |
| 1051 | if (!dir.d) { |
| 1052 | except_syserror(jni, SYSERR, errno, |
| 1053 | "failed to open directory `%s'", pathstr); |
| 1054 | goto end; |
| 1055 | } |
| 1056 | r = wrap(jni, &dir_type, &dir); |
| 1057 | end: |
| 1058 | put_cstring(jni, path, pathstr); |
| 1059 | return (r); |
| 1060 | } |
| 1061 | |
| 1062 | JNIEXPORT jbyteArray JNIFUNC(readdir)(JNIEnv *jni, jobject cls, |
| 1063 | jobject path, jobject wdir) |
| 1064 | { |
| 1065 | const char *pathstr = 0; |
| 1066 | struct dir dir; |
| 1067 | struct dirent *d; |
| 1068 | jbyteArray r = 0; |
| 1069 | |
| 1070 | if (unwrap(jni, &dir, &dir_type, wdir)) goto end; |
| 1071 | if (!dir.d) { except(jni, ARGERR, "directory has been closed"); goto end; } |
| 1072 | errno = 0; d = readdir(dir.d); |
| 1073 | if (errno) { |
| 1074 | pathstr = get_cstring(jni, path); if (!pathstr) goto end; |
| 1075 | except_syserror(jni, SYSERR, errno, |
| 1076 | "failed to read directory `%s'", pathstr); |
| 1077 | goto end; |
| 1078 | } |
| 1079 | if (d) r = wrap_cstring(jni, d->d_name); |
| 1080 | end: |
| 1081 | put_cstring(jni, path, pathstr); |
| 1082 | return (r); |
| 1083 | } |
| 1084 | |
| 1085 | JNIEXPORT void JNIFUNC(closedir)(JNIEnv *jni, jobject cls, |
| 1086 | jobject path, jobject wdir) |
| 1087 | { |
| 1088 | const char *pathstr = 0; |
| 1089 | struct dir dir; |
| 1090 | |
| 1091 | if (unwrap(jni, &dir, &dir_type, wdir)) goto end; |
| 1092 | if (!dir.d) goto end; |
| 1093 | if (closedir(dir.d)) { |
| 1094 | pathstr = get_cstring(jni, path); if (!pathstr) goto end; |
| 1095 | except_syserror(jni, SYSERR, errno, |
| 1096 | "failed to close directory `%s'", pathstr); |
| 1097 | goto end; |
| 1098 | } |
| 1099 | dir.d = 0; |
| 1100 | if (update_wrapper(jni, &dir_type, wdir, &dir)) goto end; |
| 1101 | end: |
| 1102 | put_cstring(jni, path, pathstr); |
| 1103 | } |
| 1104 | |
| 1105 | /*----- A server connection, using a Unix-domain socket -------------------*/ |
| 1106 | |
| 1107 | struct conn { |
| 1108 | struct native_base _base; |
| 1109 | int fd; |
| 1110 | unsigned f; |
| 1111 | #define CF_CLOSERD 1u |
| 1112 | #define CF_CLOSEWR 2u |
| 1113 | #define CF_CLOSEMASK (CF_CLOSERD | CF_CLOSEWR) |
| 1114 | }; |
| 1115 | static const struct native_type conn_type = |
| 1116 | { "conn", sizeof(struct conn), 0xed030167 }; |
| 1117 | |
| 1118 | JNIEXPORT wrapper JNICALL JNIFUNC(connect)(JNIEnv *jni, jobject cls, |
| 1119 | jobject path) |
| 1120 | { |
| 1121 | struct conn conn; |
| 1122 | struct sockaddr_un sun; |
| 1123 | const char *pathstr = 0; |
| 1124 | jobject ret = 0; |
| 1125 | int fd = -1; |
| 1126 | |
| 1127 | pathstr = get_cstring(jni, path); if (!pathstr) goto end; |
| 1128 | if (strlen(pathstr) >= sizeof(sun.sun_path)) { |
| 1129 | except(jni, ARGERR, |
| 1130 | "Unix-domain socket path `%s' too long", pathstr); |
| 1131 | goto end; |
| 1132 | } |
| 1133 | |
| 1134 | INIT_NATIVE(conn, &conn); |
| 1135 | fd = socket(SOCK_STREAM, PF_UNIX, 0); if (fd < 0) goto err; |
| 1136 | |
| 1137 | sun.sun_family = AF_UNIX; |
| 1138 | strcpy(sun.sun_path, (char *)pathstr); |
| 1139 | if (connect(fd, (struct sockaddr *)&sun, sizeof(sun))) goto err; |
| 1140 | |
| 1141 | conn.fd = fd; fd = -1; |
| 1142 | conn.f = 0; |
| 1143 | ret = wrap(jni, &conn_type, &conn); |
| 1144 | goto end; |
| 1145 | |
| 1146 | err: |
| 1147 | except_syserror(jni, SYSERR, errno, |
| 1148 | "failed to connect to Unix-domain socket `%s'", pathstr); |
| 1149 | end: |
| 1150 | if (fd == -1) close(fd); |
| 1151 | put_cstring(jni, path, pathstr); |
| 1152 | return (ret); |
| 1153 | } |
| 1154 | |
| 1155 | static int check_buffer_bounds(JNIEnv *jni, const char *what, |
| 1156 | jbyteArray buf, jint start, jint len) |
| 1157 | { |
| 1158 | jsize bufsz; |
| 1159 | jclass cls; |
| 1160 | |
| 1161 | cls = (*jni)->FindClass(jni, "[B"); assert(cls); |
| 1162 | if (!(*jni)->IsInstanceOf(jni, buf, cls)) { |
| 1163 | except(jni, ARGERR, |
| 1164 | "expected a byte array"); |
| 1165 | return (-1); |
| 1166 | } |
| 1167 | bufsz = (*jni)->GetArrayLength(jni, buf); |
| 1168 | if (start > bufsz) { |
| 1169 | except(jni, BOUNDSERR, |
| 1170 | "bad %s buffer bounds: start %d > buffer size %d", start, bufsz); |
| 1171 | return (-1); |
| 1172 | } |
| 1173 | if (len > bufsz - start) { |
| 1174 | except(jni, BOUNDSERR, |
| 1175 | "bad %s buffer bounds: length %d > remaining buffer size %d", |
| 1176 | len, bufsz - start); |
| 1177 | return (-1); |
| 1178 | } |
| 1179 | return (0); |
| 1180 | } |
| 1181 | |
| 1182 | JNIEXPORT void JNICALL JNIFUNC(send)(JNIEnv *jni, jobject cls, |
| 1183 | wrapper wconn, jbyteArray buf, |
| 1184 | jint start, jint len) |
| 1185 | { |
| 1186 | struct conn conn; |
| 1187 | ssize_t n; |
| 1188 | jbyte *p = 0; |
| 1189 | |
| 1190 | if (unwrap(jni, &conn, &conn_type, wconn)) goto end; |
| 1191 | if (check_buffer_bounds(jni, "send", buf, start, len)) goto end; |
| 1192 | |
| 1193 | p = (*jni)->GetByteArrayElements(jni, buf, 0); |
| 1194 | if (!p) goto end; |
| 1195 | |
| 1196 | while (len) { |
| 1197 | n = send(conn.fd, p + start, len, 0); |
| 1198 | if (n < 0) { |
| 1199 | except_syserror(jni, SYSERR, |
| 1200 | errno, "failed to send on connection"); |
| 1201 | goto end; |
| 1202 | } |
| 1203 | start += n; len -= n; |
| 1204 | } |
| 1205 | |
| 1206 | end: |
| 1207 | if (p) (*jni)->ReleaseByteArrayElements(jni, buf, p, JNI_ABORT); |
| 1208 | return; |
| 1209 | } |
| 1210 | |
| 1211 | JNIEXPORT jint JNICALL JNIFUNC(recv)(JNIEnv *jni, jobject cls, |
| 1212 | wrapper wconn, jbyteArray buf, |
| 1213 | jint start, jint len) |
| 1214 | { |
| 1215 | struct conn conn; |
| 1216 | jbyte *p = 0; |
| 1217 | jint rc = -1; |
| 1218 | |
| 1219 | if (unwrap(jni, &conn, &conn_type, wconn)) goto end; |
| 1220 | if (check_buffer_bounds(jni, "send", buf, start, len)) goto end; |
| 1221 | |
| 1222 | p = (*jni)->GetByteArrayElements(jni, buf, 0); |
| 1223 | if (!p) goto end; |
| 1224 | |
| 1225 | rc = recv(conn.fd, p + start, len, 0); |
| 1226 | if (rc < 0) { |
| 1227 | except_syserror(jni, SYSERR, |
| 1228 | errno, "failed to read from connection"); |
| 1229 | goto end; |
| 1230 | } |
| 1231 | if (!rc) rc = -1; |
| 1232 | |
| 1233 | end: |
| 1234 | if (p) (*jni)->ReleaseByteArrayElements(jni, buf, p, 0); |
| 1235 | return (rc); |
| 1236 | } |
| 1237 | |
| 1238 | JNIEXPORT void JNICALL JNIFUNC(closeconn)(JNIEnv *jni, jobject cls, |
| 1239 | wrapper wconn, jint how) |
| 1240 | { |
| 1241 | struct conn conn; |
| 1242 | int rc; |
| 1243 | |
| 1244 | if (unwrap(jni, &conn, &conn_type, wconn)) goto end; |
| 1245 | if (conn.fd == -1) goto end; |
| 1246 | |
| 1247 | how &= CF_CLOSEMASK&~conn.f; |
| 1248 | conn.f |= how; |
| 1249 | if ((conn.f&CF_CLOSEMASK) == CF_CLOSEMASK) { |
| 1250 | close(conn.fd); |
| 1251 | conn.fd = -1; |
| 1252 | } else { |
| 1253 | if (how&CF_CLOSERD) shutdown(conn.fd, SHUT_RD); |
| 1254 | if (how&CF_CLOSEWR) shutdown(conn.fd, SHUT_WR); |
| 1255 | } |
| 1256 | rc = update_wrapper(jni, &conn_type, wconn, &conn); assert(!rc); |
| 1257 | |
| 1258 | end: |
| 1259 | return; |
| 1260 | } |
| 1261 | |
| 1262 | /*----- That's all, folks -------------------------------------------------*/ |