| 1 | /* |
| 2 | Copyright (C) 2014 by Ronnie Sahlberg <ronniesahlberg@gmail.com> |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 3 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | |
| 18 | #define _GNU_SOURCE |
| 19 | |
| 20 | #include <sys/types.h> |
| 21 | #include <sys/stat.h> |
| 22 | #include <unistd.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | #include <errno.h> |
| 26 | #include <stdio.h> |
| 27 | #include <asm/fcntl.h> |
| 28 | |
| 29 | #include <nfsc/libnfs.h> |
| 30 | |
| 31 | #include <sys/syscall.h> |
| 32 | #include <dlfcn.h> |
| 33 | |
| 34 | #define NFS_MAX_FD 255 |
| 35 | |
| 36 | static int debug = 0; |
| 37 | |
| 38 | #ifndef discard_const |
| 39 | #define discard_const(ptr) ((void *)((intptr_t)(ptr))) |
| 40 | #endif |
| 41 | |
| 42 | #define LD_NFS_DPRINTF(level, fmt, args...) \ |
| 43 | do { \ |
| 44 | if ((debug) >= level) { \ |
| 45 | fprintf(stderr,"ld_nfs: "); \ |
| 46 | fprintf(stderr, (fmt), ##args); \ |
| 47 | fprintf(stderr,"\n"); \ |
| 48 | } \ |
| 49 | } while (0); |
| 50 | |
| 51 | struct nfs_fd_list { |
| 52 | int is_nfs; |
| 53 | struct nfs_context *nfs; |
| 54 | struct nfsfh *fh; |
| 55 | |
| 56 | /* so we can reopen and emulate dup2() */ |
| 57 | const char *path; |
| 58 | int flags; |
| 59 | mode_t mode; |
| 60 | }; |
| 61 | |
| 62 | static struct nfs_fd_list nfs_fd_list[NFS_MAX_FD]; |
| 63 | |
| 64 | int (*real_open)(__const char *path, int flags, mode_t mode); |
| 65 | |
| 66 | int open(const char *path, int flags, mode_t mode) |
| 67 | { |
| 68 | if (!strncmp(path, "nfs:", 4)) { |
| 69 | struct nfs_context *nfs; |
| 70 | struct nfs_url *url; |
| 71 | struct nfsfh *fh = NULL; |
| 72 | int ret, fd; |
| 73 | |
| 74 | LD_NFS_DPRINTF(9, "open(%s, %x, %o)", path, flags, mode); |
| 75 | nfs = nfs_init_context(); |
| 76 | if (nfs == NULL) { |
| 77 | LD_NFS_DPRINTF(1, "Failed to create context"); |
| 78 | errno = ENOMEM; |
| 79 | return -1; |
| 80 | } |
| 81 | |
| 82 | url = nfs_parse_url_full(nfs, path); |
| 83 | if (url == NULL) { |
| 84 | LD_NFS_DPRINTF(1, "Failed to parse URL: %s\n", |
| 85 | nfs_get_error(nfs)); |
| 86 | nfs_destroy_context(nfs); |
| 87 | errno = EINVAL; |
| 88 | return -1; |
| 89 | } |
| 90 | |
| 91 | if (nfs_mount(nfs, url->server, url->path) != 0) { |
| 92 | LD_NFS_DPRINTF(1, "Failed to mount nfs share : %s\n", |
| 93 | nfs_get_error(nfs)); |
| 94 | nfs_destroy_url(url); |
| 95 | nfs_destroy_context(nfs); |
| 96 | errno = EINVAL; |
| 97 | return -1; |
| 98 | } |
| 99 | |
| 100 | if (flags & O_CREAT) { |
| 101 | if ((ret = nfs_creat(nfs, url->file, mode, &fh)) != 0) { |
| 102 | LD_NFS_DPRINTF(1, "Failed to creat nfs file : " |
| 103 | "%s\n", nfs_get_error(nfs)); |
| 104 | nfs_destroy_url(url); |
| 105 | nfs_destroy_context(nfs); |
| 106 | errno = -ret; |
| 107 | return -1; |
| 108 | } |
| 109 | } else { |
| 110 | if ((ret = nfs_open(nfs, url->file, flags, &fh)) != 0) { |
| 111 | LD_NFS_DPRINTF(1, "Failed to open nfs file : " |
| 112 | "%s\n", nfs_get_error(nfs)); |
| 113 | nfs_destroy_url(url); |
| 114 | nfs_destroy_context(nfs); |
| 115 | errno = -ret; |
| 116 | return -1; |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | fd = nfs_get_fd(nfs); |
| 121 | if (fd >= NFS_MAX_FD) { |
| 122 | LD_NFS_DPRINTF(1, "Too many files open"); |
| 123 | nfs_destroy_url(url); |
| 124 | nfs_destroy_context(nfs); |
| 125 | errno = ENFILE; |
| 126 | return -1; |
| 127 | } |
| 128 | |
| 129 | nfs_fd_list[fd].is_nfs = 1; |
| 130 | nfs_fd_list[fd].nfs = nfs; |
| 131 | nfs_fd_list[fd].fh = fh; |
| 132 | nfs_fd_list[fd].path = strdup(path); |
| 133 | nfs_fd_list[fd].flags = flags; |
| 134 | nfs_fd_list[fd].mode = mode; |
| 135 | |
| 136 | nfs_destroy_url(url); |
| 137 | |
| 138 | LD_NFS_DPRINTF(9, "open(%s) == %d", path, fd); |
| 139 | return fd; |
| 140 | } |
| 141 | |
| 142 | return real_open(path, flags, mode); |
| 143 | } |
| 144 | |
| 145 | int open64(const char *path, int flags, mode_t mode) |
| 146 | { |
| 147 | return open(path, flags | O_LARGEFILE, mode); |
| 148 | } |
| 149 | |
| 150 | int (*real_close)(int fd); |
| 151 | |
| 152 | int close(int fd) |
| 153 | { |
| 154 | if (nfs_fd_list[fd].is_nfs == 1) { |
| 155 | int i; |
| 156 | |
| 157 | LD_NFS_DPRINTF(9, "close(%d)", fd); |
| 158 | |
| 159 | nfs_fd_list[fd].is_nfs = 0; |
| 160 | |
| 161 | nfs_close(nfs_fd_list[fd].nfs, nfs_fd_list[fd].fh); |
| 162 | nfs_fd_list[fd].fh = NULL; |
| 163 | |
| 164 | nfs_destroy_context(nfs_fd_list[fd].nfs); |
| 165 | nfs_fd_list[fd].nfs = NULL; |
| 166 | |
| 167 | free(discard_const(nfs_fd_list[fd].path)); |
| 168 | nfs_fd_list[fd].path = NULL; |
| 169 | |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | return real_close(fd); |
| 174 | } |
| 175 | |
| 176 | ssize_t (*real_read)(int fd, void *buf, size_t count); |
| 177 | |
| 178 | ssize_t read(int fd, void *buf, size_t count) |
| 179 | { |
| 180 | if (nfs_fd_list[fd].is_nfs == 1) { |
| 181 | int ret; |
| 182 | |
| 183 | LD_NFS_DPRINTF(9, "read(fd:%d count:%d)", fd, (int)count); |
| 184 | if ((ret = nfs_read(nfs_fd_list[fd].nfs, nfs_fd_list[fd].fh, |
| 185 | count, buf)) < 0) { |
| 186 | errno = -ret; |
| 187 | return -1; |
| 188 | } |
| 189 | return ret; |
| 190 | } |
| 191 | return real_read(fd, buf, count); |
| 192 | } |
| 193 | |
| 194 | ssize_t (*real_pread)(int fd, void *buf, size_t count, off_t offset); |
| 195 | ssize_t pread(int fd, void *buf, size_t count, off_t offset) { |
| 196 | if (nfs_fd_list[fd].is_nfs == 1) { |
| 197 | int ret; |
| 198 | |
| 199 | LD_NFS_DPRINTF(9, "pread(fd:%d offset:%d count:%d)", fd, |
| 200 | (int)offset, (int)count); |
| 201 | if ((ret = nfs_pread(nfs_fd_list[fd].nfs, nfs_fd_list[fd].fh, |
| 202 | offset, count, buf)) < 0) { |
| 203 | errno = -ret; |
| 204 | return -1; |
| 205 | } |
| 206 | return ret; |
| 207 | } |
| 208 | return real_pread(fd, buf, count, offset); |
| 209 | } |
| 210 | |
| 211 | ssize_t (*real_write)(int fd, const void *buf, size_t count); |
| 212 | |
| 213 | ssize_t write(int fd, const void *buf, size_t count) |
| 214 | { |
| 215 | if (nfs_fd_list[fd].is_nfs == 1) { |
| 216 | int ret; |
| 217 | |
| 218 | LD_NFS_DPRINTF(9, "write(fd:%d count:%d)", fd, (int)count); |
| 219 | if ((ret = nfs_write(nfs_fd_list[fd].nfs, nfs_fd_list[fd].fh, |
| 220 | count, |
| 221 | (char *)discard_const(buf))) < 0) { |
| 222 | errno = -ret; |
| 223 | return -1; |
| 224 | } |
| 225 | return ret; |
| 226 | } |
| 227 | return real_write(fd, buf, count); |
| 228 | } |
| 229 | |
| 230 | ssize_t (*real_pwrite)(int fd, const void *buf, size_t count, off_t offset); |
| 231 | ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset) { |
| 232 | if (nfs_fd_list[fd].is_nfs == 1) { |
| 233 | int ret; |
| 234 | |
| 235 | LD_NFS_DPRINTF(9, "pwrite(fd:%d offset:%d count:%d)", fd, |
| 236 | (int)offset, (int)count); |
| 237 | if ((ret = nfs_pwrite(nfs_fd_list[fd].nfs, nfs_fd_list[fd].fh, |
| 238 | offset, count, |
| 239 | (char *)discard_const(buf))) < 0) { |
| 240 | errno = -ret; |
| 241 | return -1; |
| 242 | } |
| 243 | return ret; |
| 244 | } |
| 245 | return real_pwrite(fd, buf, count, offset); |
| 246 | } |
| 247 | |
| 248 | int (*real_dup2)(int oldfd, int newfd); |
| 249 | |
| 250 | int dup2(int oldfd, int newfd) |
| 251 | { |
| 252 | close(newfd); |
| 253 | |
| 254 | if (nfs_fd_list[oldfd].is_nfs == 1) { |
| 255 | struct nfs_context *nfs; |
| 256 | struct nfs_url *url; |
| 257 | struct nfsfh *fh = NULL; |
| 258 | int ret, fd; |
| 259 | |
| 260 | LD_NFS_DPRINTF(9, "dup2(%s:%d, %d)", nfs_fd_list[oldfd].path, |
| 261 | oldfd, newfd); |
| 262 | nfs = nfs_init_context(); |
| 263 | if (nfs == NULL) { |
| 264 | LD_NFS_DPRINTF(1, "Failed to create context"); |
| 265 | errno = ENOMEM; |
| 266 | return -1; |
| 267 | } |
| 268 | |
| 269 | url = nfs_parse_url_full(nfs, nfs_fd_list[oldfd].path); |
| 270 | if (url == NULL) { |
| 271 | LD_NFS_DPRINTF(1, "Failed to parse URL: %s\n", |
| 272 | nfs_get_error(nfs)); |
| 273 | nfs_destroy_context(nfs); |
| 274 | errno = EINVAL; |
| 275 | return -1; |
| 276 | } |
| 277 | |
| 278 | if (nfs_mount(nfs, url->server, url->path) != 0) { |
| 279 | LD_NFS_DPRINTF(1, "Failed to mount nfs share : %s\n", |
| 280 | nfs_get_error(nfs)); |
| 281 | nfs_destroy_url(url); |
| 282 | nfs_destroy_context(nfs); |
| 283 | errno = EINVAL; |
| 284 | return -1; |
| 285 | } |
| 286 | |
| 287 | if ((ret = nfs_open(nfs, url->file, nfs_fd_list[oldfd].mode, |
| 288 | &fh)) != 0) { |
| 289 | LD_NFS_DPRINTF(1, "Failed to open nfs file : %s\n", |
| 290 | nfs_get_error(nfs)); |
| 291 | nfs_destroy_url(url); |
| 292 | nfs_destroy_context(nfs); |
| 293 | errno = -ret; |
| 294 | return -1; |
| 295 | } |
| 296 | |
| 297 | /* We could actually end on the right descriptor by chance */ |
| 298 | if (nfs_get_fd(nfs) != newfd) { |
| 299 | if (real_dup2(nfs_get_fd(nfs), newfd) < 0) { |
| 300 | LD_NFS_DPRINTF(1, "Failed to dup2 file : %d", |
| 301 | errno); |
| 302 | return -1; |
| 303 | } |
| 304 | |
| 305 | close(rpc_get_fd(nfs_get_rpc_context(nfs))); |
| 306 | rpc_set_fd(nfs_get_rpc_context(nfs), newfd); |
| 307 | } |
| 308 | |
| 309 | fd = nfs_get_fd(nfs); |
| 310 | if (fd >= NFS_MAX_FD) { |
| 311 | LD_NFS_DPRINTF(1, "Too many files open"); |
| 312 | nfs_destroy_url(url); |
| 313 | nfs_destroy_context(nfs); |
| 314 | errno = ENFILE; |
| 315 | return -1; |
| 316 | } |
| 317 | |
| 318 | nfs_fd_list[fd].is_nfs = 1; |
| 319 | nfs_fd_list[fd].nfs = nfs; |
| 320 | nfs_fd_list[fd].fh = fh; |
| 321 | nfs_fd_list[fd].path = strdup(nfs_fd_list[oldfd].path); |
| 322 | nfs_fd_list[fd].flags = nfs_fd_list[oldfd].flags; |
| 323 | nfs_fd_list[fd].mode = nfs_fd_list[oldfd].mode; |
| 324 | |
| 325 | nfs_destroy_url(url); |
| 326 | |
| 327 | LD_NFS_DPRINTF(9, "dup2(%s) successful", |
| 328 | nfs_fd_list[oldfd].path); |
| 329 | return fd; |
| 330 | } |
| 331 | |
| 332 | return real_dup2(oldfd, newfd); |
| 333 | } |
| 334 | |
| 335 | int (*real_xstat)(int ver, __const char *path, struct stat *buf); |
| 336 | |
| 337 | int __xstat(int ver, const char *path, struct stat *buf) |
| 338 | { |
| 339 | if (!strncmp(path, "nfs:", 4)) { |
| 340 | int fd, ret; |
| 341 | |
| 342 | LD_NFS_DPRINTF(9, "__xstat(%s)", path); |
| 343 | fd = open(path, 0, 0); |
| 344 | if (fd == -1) { |
| 345 | return fd; |
| 346 | } |
| 347 | |
| 348 | ret = __fxstat(ver, fd, buf); |
| 349 | close(fd); |
| 350 | return ret; |
| 351 | } |
| 352 | |
| 353 | return real_xstat(ver, path, buf); |
| 354 | } |
| 355 | |
| 356 | int (*real_xstat64)(int ver, __const char *path, struct stat64 *buf); |
| 357 | |
| 358 | int __xstat64(int ver, const char *path, struct stat64 *buf) |
| 359 | { |
| 360 | if (!strncmp(path, "nfs:", 4)) { |
| 361 | int fd, ret; |
| 362 | |
| 363 | LD_NFS_DPRINTF(9, "__xstat64(%s)", path); |
| 364 | fd = open(path, 0, 0); |
| 365 | if (fd == -1) { |
| 366 | return fd; |
| 367 | } |
| 368 | |
| 369 | ret = __fxstat64(ver, fd, buf); |
| 370 | close(fd); |
| 371 | return ret; |
| 372 | } |
| 373 | |
| 374 | return real_xstat64(ver, path, buf); |
| 375 | } |
| 376 | |
| 377 | int (*real_lxstat)(int ver, __const char *path, struct stat *buf); |
| 378 | |
| 379 | int __lxstat(int ver, const char *path, struct stat *buf) |
| 380 | { |
| 381 | if (!strncmp(path, "nfs:", 4)) { |
| 382 | int fd, ret; |
| 383 | |
| 384 | LD_NFS_DPRINTF(9, "__lxstat(%s)", path); |
| 385 | fd = open(path, 0, 0); |
| 386 | if (fd == -1) { |
| 387 | return fd; |
| 388 | } |
| 389 | |
| 390 | ret = __fxstat(ver, fd, buf); |
| 391 | close(fd); |
| 392 | return ret; |
| 393 | } |
| 394 | |
| 395 | return real_lxstat(ver, path, buf); |
| 396 | } |
| 397 | |
| 398 | int (*real_lxstat64)(int ver, __const char *path, struct stat64 *buf); |
| 399 | |
| 400 | int __lxstat64(int ver, const char *path, struct stat64 *buf) |
| 401 | { |
| 402 | if (!strncmp(path, "nfs:", 4)) { |
| 403 | int fd, ret; |
| 404 | |
| 405 | LD_NFS_DPRINTF(9, "__lxstat64(%s)", path); |
| 406 | fd = open(path, 0, 0); |
| 407 | if (fd == -1) { |
| 408 | return fd; |
| 409 | } |
| 410 | |
| 411 | ret = __fxstat64(ver, fd, buf); |
| 412 | close(fd); |
| 413 | return ret; |
| 414 | } |
| 415 | |
| 416 | return real_lxstat64(ver, path, buf); |
| 417 | } |
| 418 | |
| 419 | int (*real_fxstat)(int ver, int fd, struct stat *buf); |
| 420 | |
| 421 | int __fxstat(int ver, int fd, struct stat *buf) |
| 422 | { |
| 423 | if (nfs_fd_list[fd].is_nfs == 1) { |
| 424 | int ret; |
| 425 | struct stat64 st64; |
| 426 | |
| 427 | LD_NFS_DPRINTF(9, "__fxstat(%d)", fd); |
| 428 | if ((ret = nfs_fstat(nfs_fd_list[fd].nfs, nfs_fd_list[fd].fh, |
| 429 | (void *)&st64)) < 0) { |
| 430 | errno = -ret; |
| 431 | return -1; |
| 432 | } |
| 433 | |
| 434 | buf->st_dev = st64.st_dev; |
| 435 | buf->st_ino = st64.st_ino; |
| 436 | buf->st_mode = st64.st_mode; |
| 437 | buf->st_nlink = st64.st_nlink; |
| 438 | buf->st_uid = st64.st_uid; |
| 439 | buf->st_gid = st64.st_gid; |
| 440 | buf->st_rdev = st64.st_rdev; |
| 441 | buf->st_size = st64.st_size; |
| 442 | buf->st_blksize = st64.st_blksize; |
| 443 | buf->st_blocks = st64.st_blocks; |
| 444 | buf->st_atime = st64.st_atime; |
| 445 | buf->st_mtime = st64.st_mtime; |
| 446 | buf->st_ctime = st64.st_ctime; |
| 447 | |
| 448 | LD_NFS_DPRINTF(9, "__fxstat(%d) success", fd); |
| 449 | return ret; |
| 450 | } |
| 451 | |
| 452 | return real_fxstat(ver, fd, buf); |
| 453 | } |
| 454 | |
| 455 | int (*real_fxstat64)(int ver, int fd, struct stat64 *buf); |
| 456 | |
| 457 | int __fxstat64(int ver, int fd, struct stat64 *buf) |
| 458 | { |
| 459 | if (nfs_fd_list[fd].is_nfs == 1) { |
| 460 | int ret; |
| 461 | struct stat64 st64; |
| 462 | |
| 463 | LD_NFS_DPRINTF(9, "__fxstat64(%d)", fd); |
| 464 | if ((ret = nfs_fstat(nfs_fd_list[fd].nfs, nfs_fd_list[fd].fh, |
| 465 | (void *)&st64)) < 0) { |
| 466 | errno = -ret; |
| 467 | return -1; |
| 468 | } |
| 469 | |
| 470 | buf->st_dev = st64.st_dev; |
| 471 | buf->st_ino = st64.st_ino; |
| 472 | buf->st_mode = st64.st_mode; |
| 473 | buf->st_nlink = st64.st_nlink; |
| 474 | buf->st_uid = st64.st_uid; |
| 475 | buf->st_gid = st64.st_gid; |
| 476 | buf->st_rdev = st64.st_rdev; |
| 477 | buf->st_size = st64.st_size; |
| 478 | buf->st_blksize = st64.st_blksize; |
| 479 | buf->st_blocks = st64.st_blocks; |
| 480 | buf->st_atime = st64.st_atime; |
| 481 | buf->st_mtime = st64.st_mtime; |
| 482 | buf->st_ctime = st64.st_ctime; |
| 483 | |
| 484 | LD_NFS_DPRINTF(9, "__fxstat64(%d) success", fd); |
| 485 | return ret; |
| 486 | } |
| 487 | |
| 488 | return real_fxstat64(ver, fd, buf); |
| 489 | } |
| 490 | |
| 491 | int (*real_fallocate)(int fd, int mode, off_t offset, off_t len); |
| 492 | |
| 493 | int fallocate(int fd, int mode, off_t offset, off_t len) |
| 494 | { |
| 495 | if (nfs_fd_list[fd].is_nfs == 1) { |
| 496 | LD_NFS_DPRINTF(9, "fallocate(%d)", fd); |
| 497 | errno = EOPNOTSUPP; |
| 498 | return -1; |
| 499 | } |
| 500 | |
| 501 | return real_fallocate(fd, mode, offset, len); |
| 502 | } |
| 503 | |
| 504 | int (*real_ftruncate)(int fd, off_t len); |
| 505 | |
| 506 | int ftruncate(int fd, off_t len) |
| 507 | { |
| 508 | if (nfs_fd_list[fd].is_nfs == 1) { |
| 509 | int ret; |
| 510 | |
| 511 | LD_NFS_DPRINTF(9, "ftruncate(%d, %d)", fd, (int)len); |
| 512 | if ((ret = nfs_ftruncate(nfs_fd_list[fd].nfs, |
| 513 | nfs_fd_list[fd].fh, |
| 514 | len)) < 0) { |
| 515 | errno = -ret; |
| 516 | return -1; |
| 517 | } |
| 518 | return 0; |
| 519 | } |
| 520 | |
| 521 | return real_ftruncate(fd, len); |
| 522 | } |
| 523 | |
| 524 | int (*real_truncate)(const char *path, off_t len); |
| 525 | |
| 526 | int truncate(const char *path, off_t len) |
| 527 | { |
| 528 | if (!strncmp(path, "nfs:", 4)) { |
| 529 | int fd, ret; |
| 530 | |
| 531 | LD_NFS_DPRINTF(9, "truncate(%s, %d)", path, (int)len); |
| 532 | fd = open(path, 0, 0); |
| 533 | if (fd == -1) { |
| 534 | return fd; |
| 535 | } |
| 536 | |
| 537 | ret = ftruncate(fd, len); |
| 538 | close(fd); |
| 539 | return ret; |
| 540 | } |
| 541 | |
| 542 | return real_truncate(path, len); |
| 543 | } |
| 544 | |
| 545 | int (*real_fchmod)(int fd, mode_t mode); |
| 546 | |
| 547 | int fchmod(int fd, mode_t mode) |
| 548 | { |
| 549 | if (nfs_fd_list[fd].is_nfs == 1) { |
| 550 | int ret; |
| 551 | |
| 552 | LD_NFS_DPRINTF(9, "fchmod(%d, %o)", fd, (int)mode); |
| 553 | if ((ret = nfs_fchmod(nfs_fd_list[fd].nfs, |
| 554 | nfs_fd_list[fd].fh, |
| 555 | mode)) < 0) { |
| 556 | errno = -ret; |
| 557 | return -1; |
| 558 | } |
| 559 | return 0; |
| 560 | } |
| 561 | |
| 562 | return real_fchmod(fd, mode); |
| 563 | } |
| 564 | |
| 565 | int (*real_chmod)(const char *path, mode_t mode); |
| 566 | |
| 567 | int chmod(const char *path, mode_t mode) |
| 568 | { |
| 569 | if (!strncmp(path, "nfs:", 4)) { |
| 570 | int fd, ret; |
| 571 | |
| 572 | LD_NFS_DPRINTF(9, "chmod(%s, %o)", path, (int)mode); |
| 573 | fd = open(path, 0, 0); |
| 574 | if (fd == -1) { |
| 575 | return fd; |
| 576 | } |
| 577 | |
| 578 | ret = fchmod(fd, mode); |
| 579 | close(fd); |
| 580 | return ret; |
| 581 | } |
| 582 | |
| 583 | return real_chmod(path, mode); |
| 584 | } |
| 585 | |
| 586 | static void __attribute__((constructor)) _init(void) |
| 587 | { |
| 588 | int i; |
| 589 | |
| 590 | if (getenv("LD_NFS_DEBUG") != NULL) { |
| 591 | debug = atoi(getenv("LD_NFS_DEBUG")); |
| 592 | } |
| 593 | |
| 594 | real_open = dlsym(RTLD_NEXT, "open"); |
| 595 | if (real_open == NULL) { |
| 596 | LD_NFS_DPRINTF(0, "Failed to dlsym(open)"); |
| 597 | exit(10); |
| 598 | } |
| 599 | |
| 600 | real_close = dlsym(RTLD_NEXT, "close"); |
| 601 | if (real_close == NULL) { |
| 602 | LD_NFS_DPRINTF(0, "Failed to dlsym(close)"); |
| 603 | exit(10); |
| 604 | } |
| 605 | |
| 606 | real_read = dlsym(RTLD_NEXT, "read"); |
| 607 | if (real_read == NULL) { |
| 608 | LD_NFS_DPRINTF(0, "Failed to dlsym(read)"); |
| 609 | exit(10); |
| 610 | } |
| 611 | |
| 612 | real_pread = dlsym(RTLD_NEXT, "pread"); |
| 613 | if (real_pread == NULL) { |
| 614 | LD_NFS_DPRINTF(0, "Failed to dlsym(pread)"); |
| 615 | exit(10); |
| 616 | } |
| 617 | |
| 618 | real_write = dlsym(RTLD_NEXT, "write"); |
| 619 | if (real_write == NULL) { |
| 620 | LD_NFS_DPRINTF(0, "Failed to dlsym(write)"); |
| 621 | exit(10); |
| 622 | } |
| 623 | |
| 624 | real_pwrite = dlsym(RTLD_NEXT, "pwrite"); |
| 625 | if (real_pwrite == NULL) { |
| 626 | LD_NFS_DPRINTF(0, "Failed to dlsym(pwrite)"); |
| 627 | exit(10); |
| 628 | } |
| 629 | |
| 630 | real_xstat = dlsym(RTLD_NEXT, "__xstat"); |
| 631 | if (real_xstat == NULL) { |
| 632 | LD_NFS_DPRINTF(0, "Failed to dlsym(__xstat)"); |
| 633 | exit(10); |
| 634 | } |
| 635 | |
| 636 | real_xstat64 = dlsym(RTLD_NEXT, "__xstat64"); |
| 637 | if (real_xstat64 == NULL) { |
| 638 | LD_NFS_DPRINTF(0, "Failed to dlsym(__xstat64)"); |
| 639 | } |
| 640 | |
| 641 | real_lxstat = dlsym(RTLD_NEXT, "__lxstat"); |
| 642 | if (real_lxstat == NULL) { |
| 643 | LD_NFS_DPRINTF(0, "Failed to dlsym(__lxstat)"); |
| 644 | exit(10); |
| 645 | } |
| 646 | |
| 647 | real_lxstat64 = dlsym(RTLD_NEXT, "__lxstat64"); |
| 648 | if (real_lxstat64 == NULL) { |
| 649 | LD_NFS_DPRINTF(0, "Failed to dlsym(_lxstat64)"); |
| 650 | exit(10); |
| 651 | } |
| 652 | |
| 653 | real_fxstat = dlsym(RTLD_NEXT, "__fxstat"); |
| 654 | if (real_fxstat == NULL) { |
| 655 | LD_NFS_DPRINTF(0, "Failed to dlsym(__fxstat)"); |
| 656 | exit(10); |
| 657 | } |
| 658 | |
| 659 | real_fxstat64 = dlsym(RTLD_NEXT, "__fxstat64"); |
| 660 | if (real_fxstat64 == NULL) { |
| 661 | LD_NFS_DPRINTF(0, "Failed to dlsym(__fxstat64)"); |
| 662 | exit(10); |
| 663 | } |
| 664 | |
| 665 | real_fallocate = dlsym(RTLD_NEXT, "fallocate"); |
| 666 | if (real_fallocate == NULL) { |
| 667 | LD_NFS_DPRINTF(0, "Failed to dlsym(fallocate)"); |
| 668 | exit(10); |
| 669 | } |
| 670 | |
| 671 | real_dup2 = dlsym(RTLD_NEXT, "dup2"); |
| 672 | if (real_dup2 == NULL) { |
| 673 | LD_NFS_DPRINTF(0, "Failed to dlsym(dup2)"); |
| 674 | exit(10); |
| 675 | } |
| 676 | |
| 677 | real_truncate = dlsym(RTLD_NEXT, "truncate"); |
| 678 | if (real_truncate == NULL) { |
| 679 | LD_NFS_DPRINTF(0, "Failed to dlsym(truncate)"); |
| 680 | exit(10); |
| 681 | } |
| 682 | |
| 683 | real_ftruncate = dlsym(RTLD_NEXT, "ftruncate"); |
| 684 | if (real_ftruncate == NULL) { |
| 685 | LD_NFS_DPRINTF(0, "Failed to dlsym(ftruncate)"); |
| 686 | exit(10); |
| 687 | } |
| 688 | |
| 689 | real_chmod = dlsym(RTLD_NEXT, "chmod"); |
| 690 | if (real_chmod == NULL) { |
| 691 | LD_NFS_DPRINTF(0, "Failed to dlsym(chmod)"); |
| 692 | exit(10); |
| 693 | } |
| 694 | |
| 695 | real_fchmod = dlsym(RTLD_NEXT, "fchmod"); |
| 696 | if (real_fchmod == NULL) { |
| 697 | LD_NFS_DPRINTF(0, "Failed to dlsym(fchmod)"); |
| 698 | exit(10); |
| 699 | } |
| 700 | } |