rsync.c

   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 inc_recurse;
  45 extern int inplace;
  46 extern int flist_eof;
  47 extern int file_old_total;
  48 extern int keep_dirlinks;
  49 extern int make_backups;
  50 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  51 extern struct chmod_mode_struct *daemon_chmod_modes;
  52 #ifdef ICONV_OPTION
  53 extern char *iconv_opt;
  54 #endif
  55
  56 #ifdef ICONV_CONST
  57 iconv_t ic_chck = (iconv_t)-1;
  58 # ifdef ICONV_OPTION
  59 iconv_t ic_send = (iconv_t)-1, ic_recv = (iconv_t)-1;
  60 # endif
  61
  62 static const char *default_charset(void)
  63 {
  64 # if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET
  65         return locale_charset();
  66 # elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO
  67         return nl_langinfo(CODESET);
  68 # else
  69         return ""; /* Works with (at the very least) gnu iconv... */
  70 # endif
  71 }
  72
  73 void setup_iconv(void)
  74 {
  75         const char *defset = default_charset();
  76 # ifdef ICONV_OPTION
  77         const char *charset;
  78         char *cp;
  79 # endif
  80
  81         if (!am_server && !allow_8bit_chars) {
  82                 /* It's OK if this fails... */
  83                 ic_chck = iconv_open(defset, defset);
  84
  85                 if (DEBUG_GTE(ICONV, 2)) {
  86                         if (ic_chck == (iconv_t)-1) {
  87                                 rprintf(FINFO,
  88                                         "msg checking via isprint()"
  89                                         " (iconv_open(\"%s\", \"%s\") errno: %d)\n",
  90                                         defset, defset, errno);
  91                         } else {
  92                                 rprintf(FINFO,
  93                                         "msg checking charset: %s\n",
  94                                         defset);
  95                         }
  96                 }
  97         } else
  98                 ic_chck = (iconv_t)-1;
  99
 100 # ifdef ICONV_OPTION
 101         if (!iconv_opt)
 102                 return;
 103
 104         if ((cp = strchr(iconv_opt, ',')) != NULL) {
 105                 if (am_server) /* A local transfer needs this. */
 106                         iconv_opt = cp + 1;
 107                 else
 108                         *cp = '\0';
 109         }
 110
 111         if (!*iconv_opt || (*iconv_opt == '.' && iconv_opt[1] == '\0'))
 112                 charset = defset;
 113         else
 114                 charset = iconv_opt;
 115
 116         if ((ic_send = iconv_open(UTF8_CHARSET, charset)) == (iconv_t)-1) {
 117                 rprintf(FERROR, "iconv_open(\"%s\", \"%s\") failed\n",
 118                         UTF8_CHARSET, charset);
 119                 exit_cleanup(RERR_UNSUPPORTED);
 120         }
 121
 122         if ((ic_recv = iconv_open(charset, UTF8_CHARSET)) == (iconv_t)-1) {
 123                 rprintf(FERROR, "iconv_open(\"%s\", \"%s\") failed\n",
 124                         charset, UTF8_CHARSET);
 125                 exit_cleanup(RERR_UNSUPPORTED);
 126         }
 127
 128         if (DEBUG_GTE(ICONV, 1)) {
 129                 rprintf(FINFO, "[%s] charset: %s\n",
 130                         who_am_i(), *charset ? charset : "[LOCALE]");
 131         }
 132 # endif
 133 }
 134
 135 /* This function converts the chars in the "in" xbuf into characters in the
 136  * "out" xbuf.  The ".len" chars of the "in" xbuf is used starting from its
 137  * ".pos".  The ".size" of the "out" xbuf restricts how many characters can
 138  * be stored, starting at its ".pos+.len" position.  Note that the last byte
 139  * of the "out" xbuf is not used, which reserves space for a trailing '\0'
 140  * (though it is up to the caller to store a trailing '\0', as needed).
 141  *
 142  * We return a 0 on success or a -1 on error.  An error also sets errno to
 143  * E2BIG, EILSEQ, or EINVAL (see below); otherwise errno will be set to 0.
 144  * The "in" xbuf is altered to update ".pos" and ".len".  The "out" xbuf has
 145  * data appended, and its ".len" incremented (see below for a ".size" note).
 146  *
 147  * If ICB_CIRCULAR_OUT is set in "flags", the chars going into the "out" xbuf
 148  * can wrap around to the start, and the xbuf may have its ".size" reduced
 149  * (presumably by 1 byte) if the iconv code doesn't have space to store a
 150  * multi-byte character at the physical end of the ".buf" (though no reducing
 151  * happens if ".pos" is <= 1, since there is no room to wrap around).
 152  *
 153  * If ICB_EXPAND_OUT is set in "flags", the "out" xbuf will be allocated if
 154  * empty, and (as long as ICB_CIRCULAR_OUT is not set) expanded if too small.
 155  * This prevents the return of E2BIG (except for a circular xbuf).
 156  *
 157  * If ICB_INCLUDE_BAD is set in "flags", any badly-encoded chars are included
 158  * verbatim in the "out" xbuf, so EILSEQ will not be returned.
 159  *
 160  * If ICB_INCLUDE_INCOMPLETE is set in "flags", any incomplete multi-byte
 161  * chars are included, which ensures that EINVAL is not returned.
 162  *
 163  * If ICB_INIT is set, the iconv() conversion state is initialized prior to
 164  * processing the characters. */
 165 int iconvbufs(iconv_t ic, xbuf *in, xbuf *out, int flags)
 166 {
 167         ICONV_CONST char *ibuf;
 168         size_t icnt, ocnt, opos;
 169         char *obuf;
 170
 171         if (!out->size && flags & ICB_EXPAND_OUT) {
 172                 size_t siz = ROUND_UP_1024(in->len * 2);
 173                 alloc_xbuf(out, siz);
 174         } else if (out->len+1 >= out->size) {
 175                 /* There is no room to even start storing data. */
 176                 if (!(flags & ICB_EXPAND_OUT) || flags & ICB_CIRCULAR_OUT) {
 177                         errno = E2BIG;
 178                         return -1;
 179                 }
 180                 realloc_xbuf(out, out->size + ROUND_UP_1024(in->len * 2));
 181         }
 182
 183         if (flags & ICB_INIT)
 184                 iconv(ic, NULL, 0, NULL, 0);
 185
 186         ibuf = in->buf + in->pos;
 187         icnt = in->len;
 188
 189         opos = out->pos + out->len;
 190         if (flags & ICB_CIRCULAR_OUT) {
 191                 if (opos >= out->size) {
 192                         opos -= out->size;
 193                         /* We know that out->pos is not 0 due to the "no room" check
 194                          * above, so this can't go "negative". */
 195                         ocnt = out->pos - opos - 1;
 196                 } else {
 197                         /* Allow the use of all bytes to the physical end of the buffer
 198                          * unless pos is 0, in which case we reserve our trailing '\0'. */
 199                         ocnt = out->size - opos - (out->pos ? 0 : 1);
 200                 }
 201         } else
 202                 ocnt = out->size - opos - 1;
 203         obuf = out->buf + opos;
 204
 205         while (icnt) {
 206                 while (iconv(ic, &ibuf, &icnt, &obuf, &ocnt) == (size_t)-1) {
 207                         if (errno == EINTR)
 208                                 continue;
 209                         if (errno == EINVAL) {
 210                                 if (!(flags & ICB_INCLUDE_INCOMPLETE))
 211                                         goto finish;
 212                         } else if (errno == EILSEQ) {
 213                                 if (!(flags & ICB_INCLUDE_BAD))
 214                                         goto finish;
 215                         } else if (errno == E2BIG) {
 216                                 size_t siz;
 217                                 opos = obuf - out->buf;
 218                                 if (flags & ICB_CIRCULAR_OUT && out->pos > 1 && opos > out->pos) {
 219                                         /* We are in a divided circular buffer at the physical
 220                                          * end with room to wrap to the start.  If iconv() refused
 221                                          * to use one or more trailing bytes in the buffer, we
 222                                          * set the size to ignore the unused bytes. */
 223                                         if (opos < out->size)
 224                                                 reduce_iobuf_size(out, opos);
 225                                         obuf = out->buf;
 226                                         ocnt = out->pos - 1;
 227                                         continue;
 228                                 }
 229                                 if (!(flags & ICB_EXPAND_OUT) || flags & ICB_CIRCULAR_OUT) {
 230                                         errno = E2BIG;
 231                                         goto finish;
 232                                 }
 233                                 siz = ROUND_UP_1024(in->len * 2);
 234                                 realloc_xbuf(out, out->size + siz);
 235                                 obuf = out->buf + opos;
 236                                 ocnt += siz;
 237                                 continue;
 238                         } else {
 239                                 rsyserr(FERROR, errno, "unexpected error from iconv()");
 240                                 exit_cleanup(RERR_UNSUPPORTED);
 241                         }
 242                         *obuf++ = *ibuf++;
 243                         ocnt--, icnt--;
 244                 }
 245         }
 246
 247         errno = 0;
 248
 249   finish:
 250         opos = obuf - out->buf;
 251         if (flags & ICB_CIRCULAR_OUT && opos < out->pos)
 252                 opos += out->size;
 253         out->len = opos - out->pos;
 254
 255         in->len = icnt;
 256         in->pos = ibuf - in->buf;
 257
 258         return errno ? -1 : 0;
 259 }
 260 #endif
 261
 262 void send_protected_args(int fd, char *args[])
 263 {
 264         int i;
 265 #ifdef ICONV_OPTION
 266         int convert = ic_send != (iconv_t)-1;
 267         xbuf outbuf, inbuf;
 268
 269         if (convert)
 270                 alloc_xbuf(&outbuf, 1024);
 271 #endif
 272
 273         for (i = 0; args[i]; i++) {} /* find first NULL */
 274         args[i] = "rsync"; /* set a new arg0 */
 275         if (DEBUG_GTE(CMD, 1))
 276                 print_child_argv("protected args:", args + i + 1);
 277         do {
 278                 if (!args[i][0])
 279                         write_buf(fd, ".", 2);
 280 #ifdef ICONV_OPTION
 281                 else if (convert) {
 282                         INIT_XBUF_STRLEN(inbuf, args[i]);
 283                         iconvbufs(ic_send, &inbuf, &outbuf,
 284                                   ICB_EXPAND_OUT | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE | ICB_INIT);
 285                         outbuf.buf[outbuf.len] = '\0';
 286                         write_buf(fd, outbuf.buf, outbuf.len + 1);
 287                         outbuf.len = 0;
 288                 }
 289 #endif
 290                 else
 291                         write_buf(fd, args[i], strlen(args[i]) + 1);
 292         } while (args[++i]);
 293         write_byte(fd, 0);
 294
 295 #ifdef ICONV_OPTION
 296         if (convert)
 297                 free(outbuf.buf);
 298 #endif
 299 }
 300
 301 int read_ndx_and_attrs(int f_in, int f_out, int *iflag_ptr, uchar *type_ptr,
 302                        char *buf, int *len_ptr)
 303 {
 304         int len, iflags = 0;
 305         struct file_list *flist;
 306         uchar fnamecmp_type = FNAMECMP_FNAME;
 307         int ndx;
 308
 309   read_loop:
 310         while (1) {
 311                 ndx = read_ndx(f_in);
 312
 313                 if (ndx >= 0)
 314                         break;
 315                 if (ndx == NDX_DONE)
 316                         return ndx;
 317                 if (ndx == NDX_DEL_STATS) {
 318                         read_del_stats(f_in);
 319                         if (am_sender && am_server)
 320                                 write_del_stats(f_out);
 321                         continue;
 322                 }
 323                 if (!inc_recurse || am_sender) {
 324                         int last;
 325                         if (first_flist)
 326                                 last = first_flist->prev->ndx_start + first_flist->prev->used - 1;
 327                         else
 328                                 last = -1;
 329                         rprintf(FERROR,
 330                                 "Invalid file index: %d (%d - %d) [%s]\n",
 331                                 ndx, NDX_DONE, last, who_am_i());
 332                         exit_cleanup(RERR_PROTOCOL);
 333                 }
 334                 if (ndx == NDX_FLIST_EOF) {
 335                         flist_eof = 1;
 336                         if (DEBUG_GTE(FLIST, 3))
 337                                 rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
 338                         write_int(f_out, NDX_FLIST_EOF);
 339                         continue;
 340                 }
 341                 ndx = NDX_FLIST_OFFSET - ndx;
 342                 if (ndx < 0 || ndx >= dir_flist->used) {
 343                         ndx = NDX_FLIST_OFFSET - ndx;
 344                         rprintf(FERROR,
 345                                 "Invalid dir index: %d (%d - %d) [%s]\n",
 346                                 ndx, NDX_FLIST_OFFSET,
 347                                 NDX_FLIST_OFFSET - dir_flist->used + 1,
 348                                 who_am_i());
 349                         exit_cleanup(RERR_PROTOCOL);
 350                 }
 351
 352                 if (DEBUG_GTE(FLIST, 2)) {
 353                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
 354                                 who_am_i(), ndx);
 355                 }
 356                 /* Send all the data we read for this flist to the generator. */
 357                 start_flist_forward(ndx);
 358                 flist = recv_file_list(f_in);
 359                 flist->parent_ndx = ndx;
 360                 stop_flist_forward();
 361         }
 362
 363         iflags = protocol_version >= 29 ? read_shortint(f_in)
 364                    : ITEM_TRANSFER | ITEM_MISSING_DATA;
 365
 366         /* Support the protocol-29 keep-alive style. */
 367         if (protocol_version < 30 && ndx == cur_flist->used && iflags == ITEM_IS_NEW) {
 368                 if (am_sender)
 369                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
 370                 goto read_loop;
 371         }
 372
 373         flist = flist_for_ndx(ndx, "read_ndx_and_attrs");
 374         if (flist != cur_flist) {
 375                 cur_flist = flist;
 376                 if (am_sender) {
 377                         file_old_total = cur_flist->used;
 378                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
 379                                 file_old_total += flist->used;
 380                 }
 381         }
 382
 383         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 384                 fnamecmp_type = read_byte(f_in);
 385         *type_ptr = fnamecmp_type;
 386
 387         if (iflags & ITEM_XNAME_FOLLOWS) {
 388                 if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0)
 389                         exit_cleanup(RERR_PROTOCOL);
 390         } else {
 391                 *buf = '\0';
 392                 len = -1;
 393         }
 394         *len_ptr = len;
 395
 396         if (iflags & ITEM_TRANSFER) {
 397                 int i = ndx - cur_flist->ndx_start;
 398                 if (i < 0 || !S_ISREG(cur_flist->files[i]->mode)) {
 399                         rprintf(FERROR,
 400                                 "received request to transfer non-regular file: %d [%s]\n",
 401                                 ndx, who_am_i());
 402                         exit_cleanup(RERR_PROTOCOL);
 403                 }
 404         }
 405
 406         *iflag_ptr = iflags;
 407         return ndx;
 408 }
 409
 410 /*
 411   free a sums struct
 412   */
 413 void free_sums(struct sum_struct *s)
 414 {
 415         if (s->sums) free(s->sums);
 416         free(s);
 417 }
 418
 419 /* This is only called when we aren't preserving permissions.  Figure out what
 420  * the permissions should be and return them merged back into the mode. */
 421 mode_t dest_mode(mode_t flist_mode, mode_t stat_mode, int dflt_perms,
 422                  int exists)
 423 {
 424         int new_mode;
 425         /* If the file already exists, we'll return the local permissions,
 426          * possibly tweaked by the --executability option. */
 427         if (exists) {
 428                 new_mode = (flist_mode & ~CHMOD_BITS) | (stat_mode & CHMOD_BITS);
 429                 if (preserve_executability && S_ISREG(flist_mode)) {
 430                         /* If the source file is executable, grant execute
 431                          * rights to everyone who can read, but ONLY if the
 432                          * file isn't already executable. */
 433                         if (!(flist_mode & 0111))
 434                                 new_mode &= ~0111;
 435                         else if (!(stat_mode & 0111))
 436                                 new_mode |= (new_mode & 0444) >> 2;
 437                 }
 438         } else {
 439                 /* Apply destination default permissions and turn
 440                  * off special permissions. */
 441                 new_mode = flist_mode & (~CHMOD_BITS | dflt_perms);
 442         }
 443         return new_mode;
 444 }
 445
 446 int set_file_attrs(const char *fname, struct file_struct *file, stat_x *sxp,
 447                    const char *fnamecmp, int flags)
 448 {
 449         int updated = 0;
 450         stat_x sx2;
 451         int change_uid, change_gid;
 452         mode_t new_mode = file->mode;
 453         int inherit;
 454
 455         if (!sxp) {
 456                 if (dry_run)
 457                         return 1;
 458                 if (link_stat(fname, &sx2.st, 0) < 0) {
 459                         rsyserr(FERROR_XFER, errno, "stat %s failed",
 460                                 full_fname(fname));
 461                         return 0;
 462                 }
 463                 init_stat_x(&sx2);
 464                 sxp = &sx2;
 465                 inherit = !preserve_perms;
 466         } else
 467                 inherit = !preserve_perms && file->flags & FLAG_DIR_CREATED;
 468
 469         if (inherit && S_ISDIR(new_mode) && sxp->st.st_mode & S_ISGID) {
 470                 /* We just created this directory and its setgid
 471                  * bit is on, so make sure it stays on. */
 472                 new_mode |= S_ISGID;
 473         }
 474
 475         if (daemon_chmod_modes && !S_ISLNK(new_mode))
 476                 new_mode = tweak_mode(new_mode, daemon_chmod_modes);
 477
 478 #ifdef SUPPORT_ACLS
 479         if (preserve_acls && !S_ISLNK(file->mode) && !ACL_READY(*sxp))
 480                 get_acl(fname, sxp);
 481 #endif
 482
 483 #ifdef SUPPORT_XATTRS
 484         if (am_root < 0)
 485                 set_stat_xattr(fname, file, new_mode);
 486         if (preserve_xattrs && fnamecmp)
 487                 set_xattr(fname, file, fnamecmp, sxp);
 488 #endif
 489
 490         if (!preserve_times
 491          || (!(preserve_times & PRESERVE_DIR_TIMES) && S_ISDIR(sxp->st.st_mode))
 492          || (!(preserve_times & PRESERVE_LINK_TIMES) && S_ISLNK(sxp->st.st_mode)))
 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 #ifndef CAN_CHOWN_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                         uid_t uid = change_uid ? (uid_t)F_OWNER(file) : sxp->st.st_uid;
 531                         gid_t gid = change_gid ? (gid_t)F_GROUP(file) : sxp->st.st_gid;
 532                         if (do_lchown(fname, uid, 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                         if (uid == (uid_t)-1 && sxp->st.st_uid != (uid_t)-1)
 541                                 rprintf(FERROR_XFER, "uid 4294967295 (-1) is impossible to set on %s\n", full_fname(fname));
 542                         if (gid == (gid_t)-1 && sxp->st.st_gid != (gid_t)-1)
 543                                 rprintf(FERROR_XFER, "gid 4294967295 (-1) is impossible to set on %s\n", full_fname(fname));
 544                         /* A lchown had been done, so we need to re-stat if
 545                          * the destination had the setuid or setgid bits set
 546                          * (due to the side effect of the chown call). */
 547                         if (sxp->st.st_mode & (S_ISUID | S_ISGID)) {
 548                                 link_stat(fname, &sxp->st,
 549                                           keep_dirlinks && S_ISDIR(sxp->st.st_mode));
 550                         }
 551                 }
 552                 updated = 1;
 553         }
 554
 555 #ifdef SUPPORT_ACLS
 556         /* It's OK to call set_acl() now, even for a dir, as the generator
 557          * will enable owner-writability using chmod, if necessary.
 558          *
 559          * If set_acl() changes permission bits in the process of setting
 560          * an access ACL, it changes sxp->st.st_mode so we know whether we
 561          * need to chmod(). */
 562         if (preserve_acls && !S_ISLNK(new_mode)) {
 563                 if (set_acl(fname, file, sxp, new_mode) > 0)
 564                         updated = 1;
 565         }
 566 #endif
 567
 568 #ifdef HAVE_CHMOD
 569         if (!BITS_EQUAL(sxp->st.st_mode, new_mode, CHMOD_BITS)) {
 570                 int ret = am_root < 0 ? 0 : do_chmod(fname, new_mode);
 571                 if (ret < 0) {
 572                         rsyserr(FERROR_XFER, errno,
 573                                 "failed to set permissions on %s",
 574                                 full_fname(fname));
 575                         goto cleanup;
 576                 }
 577                 if (ret == 0) /* ret == 1 if symlink could not be set */
 578                         updated = 1;
 579         }
 580 #endif
 581
 582         if (INFO_GTE(NAME, 2) && flags & ATTRS_REPORT) {
 583                 if (updated)
 584                         rprintf(FCLIENT, "%s\n", fname);
 585                 else
 586                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 587         }
 588   cleanup:
 589         if (sxp == &sx2) {
 590 #ifdef SUPPORT_ACLS
 591                 if (preserve_acls)
 592                         free_acl(&sx2);
 593 #endif
 594 #ifdef SUPPORT_XATTRS
 595                 if (preserve_xattrs)
 596                         free_xattr(&sx2);
 597 #endif
 598         }
 599         return updated;
 600 }
 601
 602 RETSIGTYPE sig_int(UNUSED(int val))
 603 {
 604         /* KLUGE: if the user hits Ctrl-C while ssh is prompting
 605          * for a password, then our cleanup's sending of a SIGUSR1
 606          * signal to all our children may kill ssh before it has a
 607          * chance to restore the tty settings (i.e. turn echo back
 608          * on).  By sleeping for a short time, ssh gets a bigger
 609          * chance to do the right thing.  If child processes are
 610          * not ssh waiting for a password, then this tiny delay
 611          * shouldn't hurt anything. */
 612         msleep(400);
 613         exit_cleanup(RERR_SIGNAL);
 614 }
 615
 616 /* Finish off a file transfer: renaming the file and setting the file's
 617  * attributes (e.g. permissions, ownership, etc.).  If the robust_rename()
 618  * call is forced to copy the temp file and partialptr is both non-NULL and
 619  * not an absolute path, we stage the file into the partial-dir and then
 620  * rename it into place.  This returns 1 on succcess or 0 on failure. */
 621 int finish_transfer(const char *fname, const char *fnametmp,
 622                     const char *fnamecmp, const char *partialptr,
 623                     struct file_struct *file, int ok_to_set_time,
 624                     int overwriting_basis)
 625 {
 626         int ret;
 627         const char *temp_copy_name = partialptr && *partialptr != '/' ? partialptr : NULL;
 628
 629         if (inplace) {
 630                 if (DEBUG_GTE(RECV, 1))
 631                         rprintf(FINFO, "finishing %s\n", fname);
 632                 fnametmp = fname;
 633                 goto do_set_file_attrs;
 634         }
 635
 636         if (make_backups > 0 && overwriting_basis) {
 637                 int ok = make_backup(fname, False);
 638                 if (!ok)
 639                         return 1;
 640                 if (ok == 1 && fnamecmp == fname)
 641                         fnamecmp = get_backup_name(fname);
 642         }
 643
 644         /* Change permissions before putting the file into place. */
 645         set_file_attrs(fnametmp, file, NULL, fnamecmp,
 646                        ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
 647
 648         /* move tmp file over real file */
 649         if (DEBUG_GTE(RECV, 1))
 650                 rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname);
 651         ret = robust_rename(fnametmp, fname, temp_copy_name, file->mode);
 652         if (ret < 0) {
 653                 rsyserr(FERROR_XFER, errno, "%s %s -> \"%s\"",
 654                         ret == -2 ? "copy" : "rename",
 655                         full_fname(fnametmp), fname);
 656                 if (!partialptr || (ret == -2 && temp_copy_name)
 657                  || robust_rename(fnametmp, partialptr, NULL, file->mode) < 0)
 658                         do_unlink(fnametmp);
 659                 return 0;
 660         }
 661         if (ret == 0) {
 662                 /* The file was moved into place (not copied), so it's done. */
 663                 return 1;
 664         }
 665         /* The file was copied, so tweak the perms of the copied file.  If it
 666          * was copied to partialptr, move it into its final destination. */
 667         fnametmp = temp_copy_name ? temp_copy_name : fname;
 668
 669   do_set_file_attrs:
 670         set_file_attrs(fnametmp, file, NULL, fnamecmp,
 671                        ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
 672
 673         if (temp_copy_name) {
 674                 if (do_rename(fnametmp, fname) < 0) {
 675                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\"",
 676                                 full_fname(fnametmp), fname);
 677                         return 0;
 678                 }
 679                 handle_partial_dir(temp_copy_name, PDIR_DELETE);
 680         }
 681         return 1;
 682 }
 683
 684 struct file_list *flist_for_ndx(int ndx, const char *fatal_error_loc)
 685 {
 686         struct file_list *flist = cur_flist;
 687
 688         if (!flist && !(flist = first_flist))
 689                 goto not_found;
 690
 691         while (ndx < flist->ndx_start-1) {
 692                 if (flist == first_flist)
 693                         goto not_found;
 694                 flist = flist->prev;
 695         }
 696         while (ndx >= flist->ndx_start + flist->used) {
 697                 if (!(flist = flist->next))
 698                         goto not_found;
 699         }
 700         return flist;
 701
 702   not_found:
 703         if (fatal_error_loc) {
 704                 int first, last;
 705                 if (first_flist) {
 706                         first = first_flist->ndx_start - 1;
 707                         last = first_flist->prev->ndx_start + first_flist->prev->used - 1;
 708                 } else {
 709                         first = 0;
 710                         last = -1;
 711                 }
 712                 rprintf(FERROR,
 713                         "File-list index %d not in %d - %d (%s) [%s]\n",
 714                         ndx, first, last, fatal_error_loc, who_am_i());
 715                 exit_cleanup(RERR_PROTOCOL);
 716         }
 717         return NULL;
 718 }
 719
 720 const char *who_am_i(void)
 721 {
 722         if (am_starting_up)
 723                 return am_server ? "server" : "client";
 724         return am_sender ? "sender"
 725              : am_generator ? "generator"
 726              : am_receiver ? "receiver"
 727              : "Receiver"; /* pre-forked receiver */
 728 }