| 1 | /* |
| 2 | * Routines common to more than one of the rsync processes. |
| 3 | * |
| 4 | * Copyright (C) 1996 Andrew Tridgell |
| 5 | * Copyright (C) 1996 Paul Mackerras |
| 6 | * Copyright (C) 2003-2009 Wayne Davison |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 3 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along |
| 19 | * with this program; if not, visit the http://fsf.org website. |
| 20 | */ |
| 21 | |
| 22 | #include "rsync.h" |
| 23 | #include "ifuncs.h" |
| 24 | #if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET |
| 25 | #include <libcharset.h> |
| 26 | #elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO |
| 27 | #include <langinfo.h> |
| 28 | #endif |
| 29 | |
| 30 | extern int dry_run; |
| 31 | extern int preserve_acls; |
| 32 | extern int preserve_xattrs; |
| 33 | extern int preserve_perms; |
| 34 | extern int preserve_executability; |
| 35 | extern int preserve_times; |
| 36 | extern int am_root; |
| 37 | extern int am_server; |
| 38 | extern int am_sender; |
| 39 | extern int am_receiver; |
| 40 | extern int am_generator; |
| 41 | extern int am_starting_up; |
| 42 | extern int allow_8bit_chars; |
| 43 | extern int protocol_version; |
| 44 | extern int uid_ndx; |
| 45 | extern int gid_ndx; |
| 46 | extern int inc_recurse; |
| 47 | extern int inplace; |
| 48 | extern int flist_eof; |
| 49 | extern int file_old_total; |
| 50 | extern int keep_dirlinks; |
| 51 | extern int make_backups; |
| 52 | extern struct file_list *cur_flist, *first_flist, *dir_flist; |
| 53 | extern struct chmod_mode_struct *daemon_chmod_modes; |
| 54 | #ifdef ICONV_OPTION |
| 55 | extern char *iconv_opt; |
| 56 | #endif |
| 57 | |
| 58 | #ifdef ICONV_CONST |
| 59 | iconv_t ic_chck = (iconv_t)-1; |
| 60 | # ifdef ICONV_OPTION |
| 61 | iconv_t ic_send = (iconv_t)-1, ic_recv = (iconv_t)-1; |
| 62 | # endif |
| 63 | |
| 64 | static const char *default_charset(void) |
| 65 | { |
| 66 | # if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET |
| 67 | return locale_charset(); |
| 68 | # elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO |
| 69 | return nl_langinfo(CODESET); |
| 70 | # else |
| 71 | return ""; /* Works with (at the very least) gnu iconv... */ |
| 72 | # endif |
| 73 | } |
| 74 | |
| 75 | void setup_iconv(void) |
| 76 | { |
| 77 | const char *defset = default_charset(); |
| 78 | # ifdef ICONV_OPTION |
| 79 | const char *charset; |
| 80 | char *cp; |
| 81 | # endif |
| 82 | |
| 83 | if (!am_server && !allow_8bit_chars) { |
| 84 | /* It's OK if this fails... */ |
| 85 | ic_chck = iconv_open(defset, defset); |
| 86 | |
| 87 | if (DEBUG_GTE(ICONV, 2)) { |
| 88 | if (ic_chck == (iconv_t)-1) { |
| 89 | rprintf(FINFO, |
| 90 | "msg checking via isprint()" |
| 91 | " (iconv_open(\"%s\", \"%s\") errno: %d)\n", |
| 92 | defset, defset, errno); |
| 93 | } else { |
| 94 | rprintf(FINFO, |
| 95 | "msg checking charset: %s\n", |
| 96 | defset); |
| 97 | } |
| 98 | } |
| 99 | } else |
| 100 | ic_chck = (iconv_t)-1; |
| 101 | |
| 102 | # ifdef ICONV_OPTION |
| 103 | if (!iconv_opt) |
| 104 | return; |
| 105 | |
| 106 | if ((cp = strchr(iconv_opt, ',')) != NULL) { |
| 107 | if (am_server) /* A local transfer needs this. */ |
| 108 | iconv_opt = cp + 1; |
| 109 | else |
| 110 | *cp = '\0'; |
| 111 | } |
| 112 | |
| 113 | if (!*iconv_opt || (*iconv_opt == '.' && iconv_opt[1] == '\0')) |
| 114 | charset = defset; |
| 115 | else |
| 116 | charset = iconv_opt; |
| 117 | |
| 118 | if ((ic_send = iconv_open(UTF8_CHARSET, charset)) == (iconv_t)-1) { |
| 119 | rprintf(FERROR, "iconv_open(\"%s\", \"%s\") failed\n", |
| 120 | UTF8_CHARSET, charset); |
| 121 | exit_cleanup(RERR_UNSUPPORTED); |
| 122 | } |
| 123 | |
| 124 | if ((ic_recv = iconv_open(charset, UTF8_CHARSET)) == (iconv_t)-1) { |
| 125 | rprintf(FERROR, "iconv_open(\"%s\", \"%s\") failed\n", |
| 126 | charset, UTF8_CHARSET); |
| 127 | exit_cleanup(RERR_UNSUPPORTED); |
| 128 | } |
| 129 | |
| 130 | if (DEBUG_GTE(ICONV, 1)) { |
| 131 | rprintf(FINFO, "[%s] charset: %s\n", |
| 132 | who_am_i(), *charset ? charset : "[LOCALE]"); |
| 133 | } |
| 134 | # endif |
| 135 | } |
| 136 | |
| 137 | /* This function converts the chars in the "in" xbuf into characters in the |
| 138 | * "out" xbuf. The ".len" chars of the "in" xbuf is used starting from its |
| 139 | * ".pos". The ".size" of the "out" xbuf restricts how many characters can |
| 140 | * be stored, starting at its ".pos+.len" position. Note that the last byte |
| 141 | * of the "out" xbuf is not used, which reserves space for a trailing '\0' |
| 142 | * (though it is up to the caller to store a trailing '\0', as needed). |
| 143 | * |
| 144 | * We return a 0 on success or a -1 on error. An error also sets errno to |
| 145 | * E2BIG, EILSEQ, or EINVAL (see below); otherwise errno will be set to 0. |
| 146 | * The "in" xbuf is altered to update ".pos" and ".len". The "out" xbuf has |
| 147 | * data appended, and its ".len" incremented (see below for a ".size" note). |
| 148 | * |
| 149 | * If ICB_CIRCULAR_OUT is set in "flags", the chars going into the "out" xbuf |
| 150 | * can wrap around to the start, and the xbuf may have its ".size" reduced |
| 151 | * (presumably by 1 byte) if the iconv code doesn't have space to store a |
| 152 | * multi-byte character at the physical end of the ".buf" (though no reducing |
| 153 | * happens if ".pos" is <= 1, since there is no room to wrap around). |
| 154 | * |
| 155 | * If ICB_EXPAND_OUT is set in "flags", the "out" xbuf will be allocated if |
| 156 | * empty, and (as long as ICB_CIRCULAR_OUT is not set) expanded if too small. |
| 157 | * This prevents the return of E2BIG (except for a circular xbuf). |
| 158 | * |
| 159 | * If ICB_INCLUDE_BAD is set in "flags", any badly-encoded chars are included |
| 160 | * verbatim in the "out" xbuf, so EILSEQ will not be returned. |
| 161 | * |
| 162 | * If ICB_INCLUDE_INCOMPLETE is set in "flags", any incomplete multi-byte |
| 163 | * chars are included, which ensures that EINVAL is not returned. |
| 164 | * |
| 165 | * If ICB_INIT is set, the iconv() conversion state is initialized prior to |
| 166 | * processing the characters. */ |
| 167 | int iconvbufs(iconv_t ic, xbuf *in, xbuf *out, int flags) |
| 168 | { |
| 169 | ICONV_CONST char *ibuf; |
| 170 | size_t icnt, ocnt, opos; |
| 171 | char *obuf; |
| 172 | |
| 173 | if (!out->size && flags & ICB_EXPAND_OUT) { |
| 174 | size_t siz = ROUND_UP_1024(in->len * 2); |
| 175 | alloc_xbuf(out, siz); |
| 176 | } else if (out->len+1 >= out->size) { |
| 177 | /* There is no room to even start storing data. */ |
| 178 | if (!(flags & ICB_EXPAND_OUT) || flags & ICB_CIRCULAR_OUT) { |
| 179 | errno = E2BIG; |
| 180 | return -1; |
| 181 | } |
| 182 | realloc_xbuf(out, out->size + ROUND_UP_1024(in->len * 2)); |
| 183 | } |
| 184 | |
| 185 | if (flags & ICB_INIT) |
| 186 | iconv(ic, NULL, 0, NULL, 0); |
| 187 | |
| 188 | ibuf = in->buf + in->pos; |
| 189 | icnt = in->len; |
| 190 | |
| 191 | opos = out->pos + out->len; |
| 192 | if (flags & ICB_CIRCULAR_OUT) { |
| 193 | if (opos >= out->size) { |
| 194 | opos -= out->size; |
| 195 | /* We know that out->pos is not 0 due to the "no room" check |
| 196 | * above, so this can't go "negative". */ |
| 197 | ocnt = out->pos - opos - 1; |
| 198 | } else { |
| 199 | /* Allow the use of all bytes to the physical end of the buffer |
| 200 | * unless pos is 0, in which case we reserve our trailing '\0'. */ |
| 201 | ocnt = out->size - opos - (out->pos ? 0 : 1); |
| 202 | } |
| 203 | } else |
| 204 | ocnt = out->size - opos - 1; |
| 205 | obuf = out->buf + opos; |
| 206 | |
| 207 | while (icnt) { |
| 208 | while (iconv(ic, &ibuf, &icnt, &obuf, &ocnt) == (size_t)-1) { |
| 209 | if (errno == EINTR) |
| 210 | continue; |
| 211 | if (errno == EINVAL) { |
| 212 | if (!(flags & ICB_INCLUDE_INCOMPLETE)) |
| 213 | goto finish; |
| 214 | } else if (errno == EILSEQ) { |
| 215 | if (!(flags & ICB_INCLUDE_BAD)) |
| 216 | goto finish; |
| 217 | } else if (errno == E2BIG) { |
| 218 | size_t siz; |
| 219 | opos = obuf - out->buf; |
| 220 | if (flags & ICB_CIRCULAR_OUT && out->pos > 1 && opos > out->pos) { |
| 221 | /* We are in a divided circular buffer at the physical |
| 222 | * end with room to wrap to the start. If iconv() refused |
| 223 | * to use one or more trailing bytes in the buffer, we |
| 224 | * set the size to ignore the unused bytes. */ |
| 225 | if (opos < out->size) |
| 226 | reduce_iobuf_size(out, opos); |
| 227 | obuf = out->buf; |
| 228 | ocnt = out->pos - 1; |
| 229 | continue; |
| 230 | } |
| 231 | if (!(flags & ICB_EXPAND_OUT) || flags & ICB_CIRCULAR_OUT) { |
| 232 | errno = E2BIG; |
| 233 | goto finish; |
| 234 | } |
| 235 | siz = ROUND_UP_1024(in->len * 2); |
| 236 | realloc_xbuf(out, out->size + siz); |
| 237 | obuf = out->buf + opos; |
| 238 | ocnt += siz; |
| 239 | continue; |
| 240 | } else { |
| 241 | rsyserr(FERROR, errno, "unexpected error from iconv()"); |
| 242 | exit_cleanup(RERR_UNSUPPORTED); |
| 243 | } |
| 244 | *obuf++ = *ibuf++; |
| 245 | ocnt--, icnt--; |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | errno = 0; |
| 250 | |
| 251 | finish: |
| 252 | opos = obuf - out->buf; |
| 253 | if (flags & ICB_CIRCULAR_OUT && opos < out->pos) |
| 254 | opos += out->size; |
| 255 | out->len = opos - out->pos; |
| 256 | |
| 257 | in->len = icnt; |
| 258 | in->pos = ibuf - in->buf; |
| 259 | |
| 260 | return errno ? -1 : 0; |
| 261 | } |
| 262 | #endif |
| 263 | |
| 264 | void send_protected_args(int fd, char *args[]) |
| 265 | { |
| 266 | int i; |
| 267 | #ifdef ICONV_OPTION |
| 268 | int convert = ic_send != (iconv_t)-1; |
| 269 | xbuf outbuf, inbuf; |
| 270 | |
| 271 | if (convert) |
| 272 | alloc_xbuf(&outbuf, 1024); |
| 273 | #endif |
| 274 | |
| 275 | for (i = 0; args[i]; i++) {} /* find first NULL */ |
| 276 | args[i] = "rsync"; /* set a new arg0 */ |
| 277 | if (DEBUG_GTE(CMD, 1)) |
| 278 | print_child_argv("protected args:", args + i + 1); |
| 279 | do { |
| 280 | if (!args[i][0]) |
| 281 | write_buf(fd, ".", 2); |
| 282 | #ifdef ICONV_OPTION |
| 283 | else if (convert) { |
| 284 | INIT_XBUF_STRLEN(inbuf, args[i]); |
| 285 | iconvbufs(ic_send, &inbuf, &outbuf, |
| 286 | ICB_EXPAND_OUT | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE | ICB_INIT); |
| 287 | outbuf.buf[outbuf.len] = '\0'; |
| 288 | write_buf(fd, outbuf.buf, outbuf.len + 1); |
| 289 | outbuf.len = 0; |
| 290 | } |
| 291 | #endif |
| 292 | else |
| 293 | write_buf(fd, args[i], strlen(args[i]) + 1); |
| 294 | } while (args[++i]); |
| 295 | write_byte(fd, 0); |
| 296 | |
| 297 | #ifdef ICONV_OPTION |
| 298 | if (convert) |
| 299 | free(outbuf.buf); |
| 300 | #endif |
| 301 | } |
| 302 | |
| 303 | int read_ndx_and_attrs(int f_in, int f_out, int *iflag_ptr, uchar *type_ptr, |
| 304 | char *buf, int *len_ptr) |
| 305 | { |
| 306 | int len, iflags = 0; |
| 307 | struct file_list *flist; |
| 308 | uchar fnamecmp_type = FNAMECMP_FNAME; |
| 309 | int ndx; |
| 310 | |
| 311 | read_loop: |
| 312 | while (1) { |
| 313 | ndx = read_ndx(f_in); |
| 314 | |
| 315 | if (ndx >= 0) |
| 316 | break; |
| 317 | if (ndx == NDX_DONE) |
| 318 | return ndx; |
| 319 | if (ndx == NDX_DEL_STATS) { |
| 320 | read_del_stats(f_in); |
| 321 | if (am_sender && am_server) |
| 322 | write_del_stats(f_out); |
| 323 | continue; |
| 324 | } |
| 325 | if (!inc_recurse || am_sender) { |
| 326 | int last; |
| 327 | if (first_flist) |
| 328 | last = first_flist->prev->ndx_start + first_flist->prev->used - 1; |
| 329 | else |
| 330 | last = -1; |
| 331 | rprintf(FERROR, |
| 332 | "Invalid file index: %d (%d - %d) [%s]\n", |
| 333 | ndx, NDX_DONE, last, who_am_i()); |
| 334 | exit_cleanup(RERR_PROTOCOL); |
| 335 | } |
| 336 | if (ndx == NDX_FLIST_EOF) { |
| 337 | flist_eof = 1; |
| 338 | if (DEBUG_GTE(FLIST, 3)) |
| 339 | rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i()); |
| 340 | write_int(f_out, NDX_FLIST_EOF); |
| 341 | continue; |
| 342 | } |
| 343 | ndx = NDX_FLIST_OFFSET - ndx; |
| 344 | if (ndx < 0 || ndx >= dir_flist->used) { |
| 345 | ndx = NDX_FLIST_OFFSET - ndx; |
| 346 | rprintf(FERROR, |
| 347 | "Invalid dir index: %d (%d - %d) [%s]\n", |
| 348 | ndx, NDX_FLIST_OFFSET, |
| 349 | NDX_FLIST_OFFSET - dir_flist->used + 1, |
| 350 | who_am_i()); |
| 351 | exit_cleanup(RERR_PROTOCOL); |
| 352 | } |
| 353 | |
| 354 | if (DEBUG_GTE(FLIST, 2)) { |
| 355 | rprintf(FINFO, "[%s] receiving flist for dir %d\n", |
| 356 | who_am_i(), ndx); |
| 357 | } |
| 358 | /* Send all the data we read for this flist to the generator. */ |
| 359 | start_flist_forward(ndx); |
| 360 | flist = recv_file_list(f_in); |
| 361 | flist->parent_ndx = ndx; |
| 362 | stop_flist_forward(); |
| 363 | } |
| 364 | |
| 365 | iflags = protocol_version >= 29 ? read_shortint(f_in) |
| 366 | : ITEM_TRANSFER | ITEM_MISSING_DATA; |
| 367 | |
| 368 | /* Support the protocol-29 keep-alive style. */ |
| 369 | if (protocol_version < 30 && ndx == cur_flist->used && iflags == ITEM_IS_NEW) { |
| 370 | if (am_sender) |
| 371 | maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH); |
| 372 | goto read_loop; |
| 373 | } |
| 374 | |
| 375 | flist = flist_for_ndx(ndx, "read_ndx_and_attrs"); |
| 376 | if (flist != cur_flist) { |
| 377 | cur_flist = flist; |
| 378 | if (am_sender) { |
| 379 | file_old_total = cur_flist->used; |
| 380 | for (flist = first_flist; flist != cur_flist; flist = flist->next) |
| 381 | file_old_total += flist->used; |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | if (iflags & ITEM_BASIS_TYPE_FOLLOWS) |
| 386 | fnamecmp_type = read_byte(f_in); |
| 387 | *type_ptr = fnamecmp_type; |
| 388 | |
| 389 | if (iflags & ITEM_XNAME_FOLLOWS) { |
| 390 | if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0) |
| 391 | exit_cleanup(RERR_PROTOCOL); |
| 392 | } else { |
| 393 | *buf = '\0'; |
| 394 | len = -1; |
| 395 | } |
| 396 | *len_ptr = len; |
| 397 | |
| 398 | if (iflags & ITEM_TRANSFER) { |
| 399 | int i = ndx - cur_flist->ndx_start; |
| 400 | if (i < 0 || !S_ISREG(cur_flist->files[i]->mode)) { |
| 401 | rprintf(FERROR, |
| 402 | "received request to transfer non-regular file: %d [%s]\n", |
| 403 | ndx, who_am_i()); |
| 404 | exit_cleanup(RERR_PROTOCOL); |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | *iflag_ptr = iflags; |
| 409 | return ndx; |
| 410 | } |
| 411 | |
| 412 | /* |
| 413 | free a sums struct |
| 414 | */ |
| 415 | void free_sums(struct sum_struct *s) |
| 416 | { |
| 417 | if (s->sums) free(s->sums); |
| 418 | free(s); |
| 419 | } |
| 420 | |
| 421 | /* This is only called when we aren't preserving permissions. Figure out what |
| 422 | * the permissions should be and return them merged back into the mode. */ |
| 423 | mode_t dest_mode(mode_t flist_mode, mode_t stat_mode, int dflt_perms, |
| 424 | int exists) |
| 425 | { |
| 426 | int new_mode; |
| 427 | /* If the file already exists, we'll return the local permissions, |
| 428 | * possibly tweaked by the --executability option. */ |
| 429 | if (exists) { |
| 430 | new_mode = (flist_mode & ~CHMOD_BITS) | (stat_mode & CHMOD_BITS); |
| 431 | if (preserve_executability && S_ISREG(flist_mode)) { |
| 432 | /* If the source file is executable, grant execute |
| 433 | * rights to everyone who can read, but ONLY if the |
| 434 | * file isn't already executable. */ |
| 435 | if (!(flist_mode & 0111)) |
| 436 | new_mode &= ~0111; |
| 437 | else if (!(stat_mode & 0111)) |
| 438 | new_mode |= (new_mode & 0444) >> 2; |
| 439 | } |
| 440 | } else { |
| 441 | /* Apply destination default permissions and turn |
| 442 | * off special permissions. */ |
| 443 | new_mode = flist_mode & (~CHMOD_BITS | dflt_perms); |
| 444 | } |
| 445 | return new_mode; |
| 446 | } |
| 447 | |
| 448 | int set_file_attrs(const char *fname, struct file_struct *file, stat_x *sxp, |
| 449 | const char *fnamecmp, int flags) |
| 450 | { |
| 451 | int updated = 0; |
| 452 | stat_x sx2; |
| 453 | int change_uid, change_gid; |
| 454 | mode_t new_mode = file->mode; |
| 455 | int inherit; |
| 456 | |
| 457 | if (!sxp) { |
| 458 | if (dry_run) |
| 459 | return 1; |
| 460 | if (link_stat(fname, &sx2.st, 0) < 0) { |
| 461 | rsyserr(FERROR_XFER, errno, "stat %s failed", |
| 462 | full_fname(fname)); |
| 463 | return 0; |
| 464 | } |
| 465 | init_stat_x(&sx2); |
| 466 | sxp = &sx2; |
| 467 | inherit = !preserve_perms; |
| 468 | } else |
| 469 | inherit = !preserve_perms && file->flags & FLAG_DIR_CREATED; |
| 470 | |
| 471 | if (inherit && S_ISDIR(new_mode) && sxp->st.st_mode & S_ISGID) { |
| 472 | /* We just created this directory and its setgid |
| 473 | * bit is on, so make sure it stays on. */ |
| 474 | new_mode |= S_ISGID; |
| 475 | } |
| 476 | |
| 477 | if (daemon_chmod_modes && !S_ISLNK(new_mode)) |
| 478 | new_mode = tweak_mode(new_mode, daemon_chmod_modes); |
| 479 | |
| 480 | #ifdef SUPPORT_ACLS |
| 481 | if (preserve_acls && !S_ISLNK(file->mode) && !ACL_READY(*sxp)) |
| 482 | get_acl(fname, sxp); |
| 483 | #endif |
| 484 | |
| 485 | #ifdef SUPPORT_XATTRS |
| 486 | if (am_root < 0) |
| 487 | set_stat_xattr(fname, file, new_mode); |
| 488 | if (preserve_xattrs && fnamecmp) |
| 489 | set_xattr(fname, file, fnamecmp, sxp); |
| 490 | #endif |
| 491 | |
| 492 | if (!preserve_times || (S_ISDIR(sxp->st.st_mode) && preserve_times == 1)) |
| 493 | flags |= ATTRS_SKIP_MTIME; |
| 494 | if (!(flags & ATTRS_SKIP_MTIME) |
| 495 | && cmp_time(sxp->st.st_mtime, file->modtime) != 0) { |
| 496 | int ret = set_modtime(fname, file->modtime, F_MOD_NSEC(file), sxp->st.st_mode); |
| 497 | if (ret < 0) { |
| 498 | rsyserr(FERROR_XFER, errno, "failed to set times on %s", |
| 499 | full_fname(fname)); |
| 500 | goto cleanup; |
| 501 | } |
| 502 | if (ret == 0) /* ret == 1 if symlink could not be set */ |
| 503 | updated = 1; |
| 504 | else |
| 505 | file->flags |= FLAG_TIME_FAILED; |
| 506 | } |
| 507 | |
| 508 | change_uid = am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file); |
| 509 | change_gid = gid_ndx && !(file->flags & FLAG_SKIP_GROUP) |
| 510 | && sxp->st.st_gid != (gid_t)F_GROUP(file); |
| 511 | #if !defined HAVE_LCHOWN && !defined CHOWN_MODIFIES_SYMLINK |
| 512 | if (S_ISLNK(sxp->st.st_mode)) { |
| 513 | ; |
| 514 | } else |
| 515 | #endif |
| 516 | if (change_uid || change_gid) { |
| 517 | if (DEBUG_GTE(OWN, 1)) { |
| 518 | if (change_uid) { |
| 519 | rprintf(FINFO, |
| 520 | "set uid of %s from %u to %u\n", |
| 521 | fname, (unsigned)sxp->st.st_uid, F_OWNER(file)); |
| 522 | } |
| 523 | if (change_gid) { |
| 524 | rprintf(FINFO, |
| 525 | "set gid of %s from %u to %u\n", |
| 526 | fname, (unsigned)sxp->st.st_gid, F_GROUP(file)); |
| 527 | } |
| 528 | } |
| 529 | if (am_root >= 0) { |
| 530 | if (do_lchown(fname, |
| 531 | change_uid ? (uid_t)F_OWNER(file) : sxp->st.st_uid, |
| 532 | change_gid ? (gid_t)F_GROUP(file) : sxp->st.st_gid) != 0) { |
| 533 | /* We shouldn't have attempted to change uid |
| 534 | * or gid unless have the privilege. */ |
| 535 | rsyserr(FERROR_XFER, errno, "%s %s failed", |
| 536 | change_uid ? "chown" : "chgrp", |
| 537 | full_fname(fname)); |
| 538 | goto cleanup; |
| 539 | } |
| 540 | /* A lchown had been done, so we need to re-stat if |
| 541 | * the destination had the setuid or setgid bits set |
| 542 | * (due to the side effect of the chown call). */ |
| 543 | if (sxp->st.st_mode & (S_ISUID | S_ISGID)) { |
| 544 | link_stat(fname, &sxp->st, |
| 545 | keep_dirlinks && S_ISDIR(sxp->st.st_mode)); |
| 546 | } |
| 547 | } |
| 548 | updated = 1; |
| 549 | } |
| 550 | |
| 551 | #ifdef SUPPORT_ACLS |
| 552 | /* It's OK to call set_acl() now, even for a dir, as the generator |
| 553 | * will enable owner-writability using chmod, if necessary. |
| 554 | * |
| 555 | * If set_acl() changes permission bits in the process of setting |
| 556 | * an access ACL, it changes sxp->st.st_mode so we know whether we |
| 557 | * need to chmod(). */ |
| 558 | if (preserve_acls && !S_ISLNK(new_mode)) { |
| 559 | if (set_acl(fname, file, sxp, new_mode) > 0) |
| 560 | updated = 1; |
| 561 | } |
| 562 | #endif |
| 563 | |
| 564 | #ifdef HAVE_CHMOD |
| 565 | if (!BITS_EQUAL(sxp->st.st_mode, new_mode, CHMOD_BITS)) { |
| 566 | int ret = am_root < 0 ? 0 : do_chmod(fname, new_mode); |
| 567 | if (ret < 0) { |
| 568 | rsyserr(FERROR_XFER, errno, |
| 569 | "failed to set permissions on %s", |
| 570 | full_fname(fname)); |
| 571 | goto cleanup; |
| 572 | } |
| 573 | if (ret == 0) /* ret == 1 if symlink could not be set */ |
| 574 | updated = 1; |
| 575 | } |
| 576 | #endif |
| 577 | |
| 578 | if (INFO_GTE(NAME, 2) && flags & ATTRS_REPORT) { |
| 579 | if (updated) |
| 580 | rprintf(FCLIENT, "%s\n", fname); |
| 581 | else |
| 582 | rprintf(FCLIENT, "%s is uptodate\n", fname); |
| 583 | } |
| 584 | cleanup: |
| 585 | if (sxp == &sx2) { |
| 586 | #ifdef SUPPORT_ACLS |
| 587 | if (preserve_acls) |
| 588 | free_acl(&sx2); |
| 589 | #endif |
| 590 | #ifdef SUPPORT_XATTRS |
| 591 | if (preserve_xattrs) |
| 592 | free_xattr(&sx2); |
| 593 | #endif |
| 594 | } |
| 595 | return updated; |
| 596 | } |
| 597 | |
| 598 | RETSIGTYPE sig_int(UNUSED(int val)) |
| 599 | { |
| 600 | /* KLUGE: if the user hits Ctrl-C while ssh is prompting |
| 601 | * for a password, then our cleanup's sending of a SIGUSR1 |
| 602 | * signal to all our children may kill ssh before it has a |
| 603 | * chance to restore the tty settings (i.e. turn echo back |
| 604 | * on). By sleeping for a short time, ssh gets a bigger |
| 605 | * chance to do the right thing. If child processes are |
| 606 | * not ssh waiting for a password, then this tiny delay |
| 607 | * shouldn't hurt anything. */ |
| 608 | msleep(400); |
| 609 | exit_cleanup(RERR_SIGNAL); |
| 610 | } |
| 611 | |
| 612 | /* Finish off a file transfer: renaming the file and setting the file's |
| 613 | * attributes (e.g. permissions, ownership, etc.). If the robust_rename() |
| 614 | * call is forced to copy the temp file and partialptr is both non-NULL and |
| 615 | * not an absolute path, we stage the file into the partial-dir and then |
| 616 | * rename it into place. This returns 1 on succcess or 0 on failure. */ |
| 617 | int finish_transfer(const char *fname, const char *fnametmp, |
| 618 | const char *fnamecmp, const char *partialptr, |
| 619 | struct file_struct *file, int ok_to_set_time, |
| 620 | int overwriting_basis) |
| 621 | { |
| 622 | int ret; |
| 623 | const char *temp_copy_name = partialptr && *partialptr != '/' ? partialptr : NULL; |
| 624 | |
| 625 | if (inplace) { |
| 626 | if (DEBUG_GTE(RECV, 1)) |
| 627 | rprintf(FINFO, "finishing %s\n", fname); |
| 628 | fnametmp = fname; |
| 629 | goto do_set_file_attrs; |
| 630 | } |
| 631 | |
| 632 | if (make_backups > 0 && overwriting_basis) { |
| 633 | int ok = make_backup(fname, False); |
| 634 | if (!ok) |
| 635 | return 1; |
| 636 | if (ok == 1 && fnamecmp == fname) |
| 637 | fnamecmp = get_backup_name(fname); |
| 638 | } |
| 639 | |
| 640 | /* Change permissions before putting the file into place. */ |
| 641 | set_file_attrs(fnametmp, file, NULL, fnamecmp, |
| 642 | ok_to_set_time ? 0 : ATTRS_SKIP_MTIME); |
| 643 | |
| 644 | /* move tmp file over real file */ |
| 645 | if (DEBUG_GTE(RECV, 1)) |
| 646 | rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname); |
| 647 | ret = robust_rename(fnametmp, fname, temp_copy_name, |
| 648 | file->mode & INITACCESSPERMS); |
| 649 | if (ret < 0) { |
| 650 | rsyserr(FERROR_XFER, errno, "%s %s -> \"%s\"", |
| 651 | ret == -2 ? "copy" : "rename", |
| 652 | full_fname(fnametmp), fname); |
| 653 | if (!partialptr || (ret == -2 && temp_copy_name) |
| 654 | || robust_rename(fnametmp, partialptr, NULL, |
| 655 | file->mode & INITACCESSPERMS) < 0) |
| 656 | do_unlink(fnametmp); |
| 657 | return 0; |
| 658 | } |
| 659 | if (ret == 0) { |
| 660 | /* The file was moved into place (not copied), so it's done. */ |
| 661 | return 1; |
| 662 | } |
| 663 | /* The file was copied, so tweak the perms of the copied file. If it |
| 664 | * was copied to partialptr, move it into its final destination. */ |
| 665 | fnametmp = temp_copy_name ? temp_copy_name : fname; |
| 666 | |
| 667 | do_set_file_attrs: |
| 668 | set_file_attrs(fnametmp, file, NULL, fnamecmp, |
| 669 | ok_to_set_time ? 0 : ATTRS_SKIP_MTIME); |
| 670 | |
| 671 | if (temp_copy_name) { |
| 672 | if (do_rename(fnametmp, fname) < 0) { |
| 673 | rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\"", |
| 674 | full_fname(fnametmp), fname); |
| 675 | return 0; |
| 676 | } |
| 677 | handle_partial_dir(temp_copy_name, PDIR_DELETE); |
| 678 | } |
| 679 | return 1; |
| 680 | } |
| 681 | |
| 682 | struct file_list *flist_for_ndx(int ndx, const char *fatal_error_loc) |
| 683 | { |
| 684 | struct file_list *flist = cur_flist; |
| 685 | |
| 686 | if (!flist && !(flist = first_flist)) |
| 687 | goto not_found; |
| 688 | |
| 689 | while (ndx < flist->ndx_start-1) { |
| 690 | if (flist == first_flist) |
| 691 | goto not_found; |
| 692 | flist = flist->prev; |
| 693 | } |
| 694 | while (ndx >= flist->ndx_start + flist->used) { |
| 695 | if (!(flist = flist->next)) |
| 696 | goto not_found; |
| 697 | } |
| 698 | return flist; |
| 699 | |
| 700 | not_found: |
| 701 | if (fatal_error_loc) { |
| 702 | int first, last; |
| 703 | if (first_flist) { |
| 704 | first = first_flist->ndx_start - 1; |
| 705 | last = first_flist->prev->ndx_start + first_flist->prev->used - 1; |
| 706 | } else { |
| 707 | first = 0; |
| 708 | last = -1; |
| 709 | } |
| 710 | rprintf(FERROR, |
| 711 | "File-list index %d not in %d - %d (%s) [%s]\n", |
| 712 | ndx, first, last, fatal_error_loc, who_am_i()); |
| 713 | exit_cleanup(RERR_PROTOCOL); |
| 714 | } |
| 715 | return NULL; |
| 716 | } |
| 717 | |
| 718 | const char *who_am_i(void) |
| 719 | { |
| 720 | if (am_starting_up) |
| 721 | return am_server ? "server" : "client"; |
| 722 | return am_sender ? "sender" |
| 723 | : am_generator ? "generator" |
| 724 | : am_receiver ? "receiver" |
| 725 | : "Receiver"; /* pre-forked receiver */ |
| 726 | } |