diff options
Diffstat (limited to '')
| -rw-r--r-- | receiver.c | 980 |
1 files changed, 980 insertions, 0 deletions
diff --git a/receiver.c b/receiver.c new file mode 100644 index 0000000..c9d7e01 --- /dev/null +++ b/receiver.c @@ -0,0 +1,980 @@ +/* + * Routines only used by the receiving process. + * + * Copyright (C) 1996-2000 Andrew Tridgell + * Copyright (C) 1996 Paul Mackerras + * Copyright (C) 2003-2022 Wayne Davison + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, visit the http://fsf.org website. + */ + +#include "rsync.h" +#include "inums.h" + +extern int dry_run; +extern int do_xfers; +extern int am_root; +extern int am_server; +extern int inc_recurse; +extern int log_before_transfer; +extern int stdout_format_has_i; +extern int logfile_format_has_i; +extern int want_xattr_optim; +extern int csum_length; +extern int read_batch; +extern int write_batch; +extern int batch_gen_fd; +extern int protocol_version; +extern int relative_paths; +extern int preserve_hard_links; +extern int preserve_perms; +extern int write_devices; +extern int preserve_xattrs; +extern int do_fsync; +extern int basis_dir_cnt; +extern int make_backups; +extern int cleanup_got_literal; +extern int remove_source_files; +extern int append_mode; +extern int sparse_files; +extern int preallocate_files; +extern int keep_partial; +extern int checksum_seed; +extern int whole_file; +extern int inplace; +extern int inplace_partial; +extern int allowed_lull; +extern int delay_updates; +extern BOOL want_progress_now; +extern mode_t orig_umask; +extern struct stats stats; +extern char *tmpdir; +extern char *partial_dir; +extern char *basis_dir[MAX_BASIS_DIRS+1]; +extern char sender_file_sum[MAX_DIGEST_LEN]; +extern struct file_list *cur_flist, *first_flist, *dir_flist; +extern filter_rule_list daemon_filter_list; +extern OFF_T preallocated_len; + +extern struct name_num_item *xfer_sum_nni; +extern int xfer_sum_len; + +static struct bitbag *delayed_bits = NULL; +static int phase = 0, redoing = 0; +static flist_ndx_list batch_redo_list; +/* This is non-0 when we are updating the basis file or an identical copy: */ +static int updating_basis_or_equiv; + +#define TMPNAME_SUFFIX ".XXXXXX" +#define TMPNAME_SUFFIX_LEN ((int)sizeof TMPNAME_SUFFIX - 1) +#define MAX_UNIQUE_NUMBER 999999 +#define MAX_UNIQUE_LOOP 100 + +/* get_tmpname() - create a tmp filename for a given filename + * + * If a tmpdir is defined, use that as the directory to put it in. Otherwise, + * the tmp filename is in the same directory as the given name. Note that + * there may be no directory at all in the given name! + * + * The tmp filename is basically the given filename with a dot prepended, and + * .XXXXXX appended (for mkstemp() to put its unique gunk in). We take care + * to not exceed either the MAXPATHLEN or NAME_MAX, especially the last, as + * the basename basically becomes 8 characters longer. In such a case, the + * original name is shortened sufficiently to make it all fit. + * + * If the make_unique arg is True, the XXXXXX string is replaced with a unique + * string that doesn't exist at the time of the check. This is intended to be + * used for creating hard links, symlinks, devices, and special files, since + * normal files should be handled by mkstemp() for safety. + * + * Of course, the only reason the file is based on the original name is to + * make it easier to figure out what purpose a temp file is serving when a + * transfer is in progress. */ +int get_tmpname(char *fnametmp, const char *fname, BOOL make_unique) +{ + int maxname, length = 0; + const char *f; + char *suf; + + if (tmpdir) { + /* Note: this can't overflow, so the return value is safe */ + length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2); + fnametmp[length++] = '/'; + } + + if ((f = strrchr(fname, '/')) != NULL) { + ++f; + if (!tmpdir) { + length = f - fname; + /* copy up to and including the slash */ + strlcpy(fnametmp, fname, length + 1); + } + } else + f = fname; + + if (!tmpdir) { /* using a tmpdir avoids the leading dot on our temp names */ + if (*f == '.') /* avoid an extra leading dot for OS X's sake */ + f++; + fnametmp[length++] = '.'; + } + + /* The maxname value is bufsize, and includes space for the '\0'. + * NAME_MAX needs an extra -1 for the name's leading dot. */ + maxname = MIN(MAXPATHLEN - length - TMPNAME_SUFFIX_LEN, + NAME_MAX - 1 - TMPNAME_SUFFIX_LEN); + + if (maxname < 0) { + rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname); + fnametmp[0] = '\0'; + return 0; + } + + if (maxname) { + int added = strlcpy(fnametmp + length, f, maxname); + if (added >= maxname) + added = maxname - 1; + suf = fnametmp + length + added; + + /* Trim any dangling high-bit chars if the first-trimmed char (if any) is + * also a high-bit char, just in case we cut into a multi-byte sequence. + * We are guaranteed to stop because of the leading '.' we added. */ + if ((int)f[added] & 0x80) { + while ((int)suf[-1] & 0x80) + suf--; + } + /* trim one trailing dot before our suffix's dot */ + if (suf[-1] == '.') + suf--; + } else + suf = fnametmp + length - 1; /* overwrite the leading dot with suffix's dot */ + + if (make_unique) { + static unsigned counter_limit; + unsigned counter; + + if (!counter_limit) { + counter_limit = (unsigned)getpid() + MAX_UNIQUE_LOOP; + if (counter_limit > MAX_UNIQUE_NUMBER || counter_limit < MAX_UNIQUE_LOOP) + counter_limit = MAX_UNIQUE_LOOP; + } + counter = counter_limit - MAX_UNIQUE_LOOP; + + /* This doesn't have to be very good because we don't need + * to worry about someone trying to guess the values: all + * a conflict will do is cause a device, special file, hard + * link, or symlink to fail to be created. Also: avoid + * using mktemp() due to gcc's annoying warning. */ + while (1) { + snprintf(suf, TMPNAME_SUFFIX_LEN+1, ".%d", counter); + if (access(fnametmp, 0) < 0) + break; + if (++counter >= counter_limit) + return 0; + } + } else + memcpy(suf, TMPNAME_SUFFIX, TMPNAME_SUFFIX_LEN+1); + + return 1; +} + +/* Opens a temporary file for writing. + * Success: Writes name into fnametmp, returns fd. + * Failure: Clobbers fnametmp, returns -1. + * Calling cleanup_set() is the caller's job. */ +int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file) +{ + int fd; + mode_t added_perms; + + if (!get_tmpname(fnametmp, fname, False)) + return -1; + + if (am_root < 0) { + /* For --fake-super, the file must be useable by the copying + * user, just like it would be for root. */ + added_perms = S_IRUSR|S_IWUSR; + } else { + /* For a normal copy, we need to be able to tweak things like xattrs. */ + added_perms = S_IWUSR; + } + + /* We initially set the perms without the setuid/setgid bits or group + * access to ensure that there is no race condition. They will be + * correctly updated after the right owner and group info is set. + * (Thanks to snabb@epipe.fi for pointing this out.) */ + fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS); + +#if 0 + /* In most cases parent directories will already exist because their + * information should have been previously transferred, but that may + * not be the case with -R */ + if (fd == -1 && relative_paths && errno == ENOENT + && make_path(fnametmp, MKP_SKIP_SLASH | MKP_DROP_NAME) == 0) { + /* Get back to name with XXXXXX in it. */ + get_tmpname(fnametmp, fname, False); + fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS); + } +#endif + + if (fd == -1) { + rsyserr(FERROR_XFER, errno, "mkstemp %s failed", + full_fname(fnametmp)); + return -1; + } + + return fd; +} + +static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r, + const char *fname, int fd, struct file_struct *file, int inplace_sizing) +{ + static char file_sum1[MAX_DIGEST_LEN]; + struct map_struct *mapbuf; + struct sum_struct sum; + int32 len; + OFF_T total_size = F_LENGTH(file); + OFF_T offset = 0; + OFF_T offset2; + char *data; + int32 i; + char *map = NULL; + +#ifdef SUPPORT_PREALLOCATION + if (preallocate_files && fd != -1 && total_size > 0 && (!inplace_sizing || total_size > size_r)) { + /* Try to preallocate enough space for file's eventual length. Can + * reduce fragmentation on filesystems like ext4, xfs, and NTFS. */ + if ((preallocated_len = do_fallocate(fd, 0, total_size)) < 0) + rsyserr(FWARNING, errno, "do_fallocate %s", full_fname(fname)); + } else +#endif + if (inplace_sizing) { +#ifdef HAVE_FTRUNCATE + /* The most compatible way to create a sparse file is to start with no length. */ + if (sparse_files > 0 && whole_file && fd >= 0 && do_ftruncate(fd, 0) == 0) + preallocated_len = 0; + else +#endif + preallocated_len = size_r; + } else + preallocated_len = 0; + + read_sum_head(f_in, &sum); + + if (fd_r >= 0 && size_r > 0) { + int32 read_size = MAX(sum.blength * 2, 16*1024); + mapbuf = map_file(fd_r, size_r, read_size, sum.blength); + if (DEBUG_GTE(DELTASUM, 2)) { + rprintf(FINFO, "recv mapped %s of size %s\n", + fname_r, big_num(size_r)); + } + } else + mapbuf = NULL; + + sum_init(xfer_sum_nni, checksum_seed); + + if (append_mode > 0) { + OFF_T j; + sum.flength = (OFF_T)sum.count * sum.blength; + if (sum.remainder) + sum.flength -= sum.blength - sum.remainder; + if (append_mode == 2 && mapbuf) { + for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) { + if (INFO_GTE(PROGRESS, 1)) + show_progress(offset, total_size); + sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE), + CHUNK_SIZE); + offset = j; + } + if (offset < sum.flength) { + int32 len = (int32)(sum.flength - offset); + if (INFO_GTE(PROGRESS, 1)) + show_progress(offset, total_size); + sum_update(map_ptr(mapbuf, offset, len), len); + } + } + offset = sum.flength; + if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) { + rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s", + full_fname(fname), big_num(j), big_num(offset)); + exit_cleanup(RERR_FILEIO); + } + } + + while ((i = recv_token(f_in, &data)) != 0) { + if (INFO_GTE(PROGRESS, 1)) + show_progress(offset, total_size); + + if (allowed_lull) + maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH | MSK_ACTIVE_RECEIVER); + + if (i > 0) { + if (DEBUG_GTE(DELTASUM, 3)) { + rprintf(FINFO,"data recv %d at %s\n", + i, big_num(offset)); + } + + stats.literal_data += i; + cleanup_got_literal = 1; + + sum_update(data, i); + + if (fd != -1 && write_file(fd, 0, offset, data, i) != i) + goto report_write_error; + offset += i; + continue; + } + + i = -(i+1); + offset2 = i * (OFF_T)sum.blength; + len = sum.blength; + if (i == (int)sum.count-1 && sum.remainder != 0) + len = sum.remainder; + + stats.matched_data += len; + + if (DEBUG_GTE(DELTASUM, 3)) { + rprintf(FINFO, + "chunk[%d] of size %ld at %s offset=%s%s\n", + i, (long)len, big_num(offset2), big_num(offset), + updating_basis_or_equiv && offset == offset2 ? " (seek)" : ""); + } + + if (mapbuf) { + map = map_ptr(mapbuf,offset2,len); + + see_token(map, len); + sum_update(map, len); + } + + if (updating_basis_or_equiv) { + if (offset == offset2 && fd != -1) { + if (skip_matched(fd, offset, map, len) < 0) + goto report_write_error; + offset += len; + continue; + } + } + if (fd != -1 && map && write_file(fd, 0, offset, map, len) != (int)len) + goto report_write_error; + offset += len; + } + + if (fd != -1 && offset > 0) { + if (sparse_files > 0) { + if (sparse_end(fd, offset) != 0) + goto report_write_error; + } else if (flush_write_file(fd) < 0) { + report_write_error: + rsyserr(FERROR_XFER, errno, "write failed on %s", full_fname(fname)); + exit_cleanup(RERR_FILEIO); + } + } + +#ifdef HAVE_FTRUNCATE + /* inplace: New data could be shorter than old data. + * preallocate_files: total_size could have been an overestimate. + * Cut off any extra preallocated zeros from dest file. */ + if ((inplace_sizing || preallocated_len > offset) && fd != -1 && !IS_DEVICE(file->mode)) { + if (do_ftruncate(fd, offset) < 0) + rsyserr(FERROR_XFER, errno, "ftruncate failed on %s", full_fname(fname)); + } +#endif + + if (INFO_GTE(PROGRESS, 1)) + end_progress(total_size); + + sum_end(file_sum1); + + if (do_fsync && fd != -1 && fsync(fd) != 0) { + rsyserr(FERROR, errno, "fsync failed on %s", full_fname(fname)); + exit_cleanup(RERR_FILEIO); + } + + if (mapbuf) + unmap_file(mapbuf); + + read_buf(f_in, sender_file_sum, xfer_sum_len); + if (DEBUG_GTE(DELTASUM, 2)) + rprintf(FINFO,"got file_sum\n"); + if (fd != -1 && memcmp(file_sum1, sender_file_sum, xfer_sum_len) != 0) + return 0; + return 1; +} + + +static void discard_receive_data(int f_in, struct file_struct *file) +{ + receive_data(f_in, NULL, -1, 0, NULL, -1, file, 0); +} + +static void handle_delayed_updates(char *local_name) +{ + char *fname, *partialptr; + int ndx; + + for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) { + struct file_struct *file = cur_flist->files[ndx]; + fname = local_name ? local_name : f_name(file, NULL); + if ((partialptr = partial_dir_fname(fname)) != NULL) { + if (make_backups > 0 && !make_backup(fname, False)) + continue; + if (DEBUG_GTE(RECV, 1)) { + rprintf(FINFO, "renaming %s to %s\n", + partialptr, fname); + } + /* We don't use robust_rename() here because the + * partial-dir must be on the same drive. */ + if (do_rename(partialptr, fname) < 0) { + rsyserr(FERROR_XFER, errno, + "rename failed for %s (from %s)", + full_fname(fname), partialptr); + } else { + if (remove_source_files || (preserve_hard_links && F_IS_HLINKED(file))) + send_msg_success(fname, ndx); + handle_partial_dir(partialptr, PDIR_DELETE); + } + } + } +} + +static void no_batched_update(int ndx, BOOL is_redo) +{ + struct file_list *flist = flist_for_ndx(ndx, "no_batched_update"); + struct file_struct *file = flist->files[ndx - flist->ndx_start]; + + rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n", + is_redo ? " resend of" : "", f_name(file, NULL)); + + if (inc_recurse && !dry_run) + send_msg_int(MSG_NO_SEND, ndx); +} + +static int we_want_redo(int desired_ndx) +{ + static int redo_ndx = -1; + + while (redo_ndx < desired_ndx) { + if (redo_ndx >= 0) + no_batched_update(redo_ndx, True); + if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0) + return 0; + } + + if (redo_ndx == desired_ndx) { + redo_ndx = -1; + return 1; + } + + return 0; +} + +static int gen_wants_ndx(int desired_ndx, int flist_num) +{ + static int next_ndx = -1; + static int done_cnt = 0; + static BOOL got_eof = False; + + if (got_eof) + return 0; + + /* TODO: integrate gen-reading I/O into perform_io() so this is not needed? */ + io_flush(FULL_FLUSH); + + while (next_ndx < desired_ndx) { + if (inc_recurse && flist_num <= done_cnt) + return 0; + if (next_ndx >= 0) + no_batched_update(next_ndx, False); + if ((next_ndx = read_int(batch_gen_fd)) < 0) { + if (inc_recurse) { + done_cnt++; + continue; + } + got_eof = True; + return 0; + } + } + + if (next_ndx == desired_ndx) { + next_ndx = -1; + return 1; + } + + return 0; +} + +/** + * main routine for receiver process. + * + * Receiver process runs on the same host as the generator process. */ +int recv_files(int f_in, int f_out, char *local_name) +{ + int fd1,fd2; + STRUCT_STAT st; + int iflags, xlen; + char *fname, fbuf[MAXPATHLEN]; + char xname[MAXPATHLEN]; + char *fnametmp, fnametmpbuf[MAXPATHLEN]; + char *fnamecmp, *partialptr; + char fnamecmpbuf[MAXPATHLEN]; + uchar fnamecmp_type; + struct file_struct *file; + int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i; + enum logcode log_code = log_before_transfer ? FLOG : FINFO; + int max_phase = protocol_version >= 29 ? 2 : 1; + int dflt_perms = (ACCESSPERMS & ~orig_umask); +#ifdef SUPPORT_ACLS + const char *parent_dirname = ""; +#endif + int ndx, recv_ok, one_inplace; + + if (DEBUG_GTE(RECV, 1)) + rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used); + + if (delay_updates) + delayed_bits = bitbag_create(cur_flist->used + 1); + + if (whole_file < 0) + whole_file = 0; + + progress_init(); + + while (1) { + cleanup_disable(); + + /* This call also sets cur_flist. */ + ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, + xname, &xlen); + if (ndx == NDX_DONE) { + if (!am_server && cur_flist) { + set_current_file_index(NULL, 0); + if (INFO_GTE(PROGRESS, 2)) + end_progress(0); + } + if (inc_recurse && first_flist) { + if (read_batch) { + ndx = first_flist->used + first_flist->ndx_start; + gen_wants_ndx(ndx, first_flist->flist_num); + } + flist_free(first_flist); + if (first_flist) + continue; + } else if (read_batch && first_flist) { + ndx = first_flist->used; + gen_wants_ndx(ndx, first_flist->flist_num); + } + if (++phase > max_phase) + break; + if (DEBUG_GTE(RECV, 1)) + rprintf(FINFO, "recv_files phase=%d\n", phase); + if (phase == 2 && delay_updates) + handle_delayed_updates(local_name); + write_int(f_out, NDX_DONE); + continue; + } + + if (ndx - cur_flist->ndx_start >= 0) + file = cur_flist->files[ndx - cur_flist->ndx_start]; + else + file = dir_flist->files[cur_flist->parent_ndx]; + fname = local_name ? local_name : f_name(file, fbuf); + + if (DEBUG_GTE(RECV, 1)) + rprintf(FINFO, "recv_files(%s)\n", fname); + + if (daemon_filter_list.head && (*fname != '.' || fname[1] != '\0')) { + int filt_flags = S_ISDIR(file->mode) ? NAME_IS_DIR : NAME_IS_FILE; + if (check_filter(&daemon_filter_list, FLOG, fname, filt_flags) < 0) { + rprintf(FERROR, "ERROR: rejecting file transfer request for daemon excluded file: %s\n", + fname); + exit_cleanup(RERR_PROTOCOL); + } + } + +#ifdef SUPPORT_XATTRS + if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers + && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))) + recv_xattr_request(file, f_in); +#endif + + if (!(iflags & ITEM_TRANSFER)) { + maybe_log_item(file, iflags, itemizing, xname); +#ifdef SUPPORT_XATTRS + if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers + && !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)) + set_file_attrs(fname, file, NULL, fname, 0); +#endif + if (iflags & ITEM_IS_NEW) { + stats.created_files++; + if (S_ISREG(file->mode)) { + /* Nothing further to count. */ + } else if (S_ISDIR(file->mode)) + stats.created_dirs++; +#ifdef SUPPORT_LINKS + else if (S_ISLNK(file->mode)) + stats.created_symlinks++; +#endif + else if (IS_DEVICE(file->mode)) + stats.created_devices++; + else + stats.created_specials++; + } + continue; + } + if (phase == 2) { + rprintf(FERROR, + "got transfer request in phase 2 [%s]\n", + who_am_i()); + exit_cleanup(RERR_PROTOCOL); + } + + if (file->flags & FLAG_FILE_SENT) { + if (csum_length == SHORT_SUM_LENGTH) { + if (keep_partial && !partial_dir) + make_backups = -make_backups; /* prevents double backup */ + if (append_mode) + sparse_files = -sparse_files; + append_mode = -append_mode; + csum_length = SUM_LENGTH; + redoing = 1; + } + } else { + if (csum_length != SHORT_SUM_LENGTH) { + if (keep_partial && !partial_dir) + make_backups = -make_backups; + if (append_mode) + sparse_files = -sparse_files; + append_mode = -append_mode; + csum_length = SHORT_SUM_LENGTH; + redoing = 0; + } + if (iflags & ITEM_IS_NEW) + stats.created_files++; + } + + if (!am_server) + set_current_file_index(file, ndx); + stats.xferred_files++; + stats.total_transferred_size += F_LENGTH(file); + + cleanup_got_literal = 0; + + if (read_batch) { + int wanted = redoing + ? we_want_redo(ndx) + : gen_wants_ndx(ndx, cur_flist->flist_num); + if (!wanted) { + rprintf(FINFO, + "(Skipping batched update for%s \"%s\")\n", + redoing ? " resend of" : "", + fname); + discard_receive_data(f_in, file); + file->flags |= FLAG_FILE_SENT; + continue; + } + } + + remember_initial_stats(); + + if (!do_xfers) { /* log the transfer */ + log_item(FCLIENT, file, iflags, NULL); + if (read_batch) + discard_receive_data(f_in, file); + continue; + } + if (write_batch < 0) { + log_item(FCLIENT, file, iflags, NULL); + if (!am_server) + discard_receive_data(f_in, file); + if (inc_recurse) + send_msg_success(fname, ndx); + continue; + } + + partialptr = partial_dir ? partial_dir_fname(fname) : fname; + + if (protocol_version >= 29) { + switch (fnamecmp_type) { + case FNAMECMP_FNAME: + fnamecmp = fname; + break; + case FNAMECMP_PARTIAL_DIR: + fnamecmp = partialptr; + break; + case FNAMECMP_BACKUP: + fnamecmp = get_backup_name(fname); + break; + case FNAMECMP_FUZZY: + if (file->dirname) { + pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, file->dirname, xname); + fnamecmp = fnamecmpbuf; + } else + fnamecmp = xname; + break; + default: + if (fnamecmp_type > FNAMECMP_FUZZY && fnamecmp_type-FNAMECMP_FUZZY <= basis_dir_cnt) { + fnamecmp_type -= FNAMECMP_FUZZY + 1; + if (file->dirname) { + stringjoin(fnamecmpbuf, sizeof fnamecmpbuf, + basis_dir[fnamecmp_type], "/", file->dirname, "/", xname, NULL); + } else + pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], xname); + } else if (fnamecmp_type >= basis_dir_cnt) { + rprintf(FERROR, + "invalid basis_dir index: %d.\n", + fnamecmp_type); + exit_cleanup(RERR_PROTOCOL); + } else + pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], fname); + fnamecmp = fnamecmpbuf; + break; + } + if (!fnamecmp || (daemon_filter_list.head + && check_filter(&daemon_filter_list, FLOG, fnamecmp, 0) < 0)) { + fnamecmp = fname; + fnamecmp_type = FNAMECMP_FNAME; + } + } else { + /* Reminder: --inplace && --partial-dir are never + * enabled at the same time. */ + if (inplace && make_backups > 0) { + if (!(fnamecmp = get_backup_name(fname))) + fnamecmp = fname; + else + fnamecmp_type = FNAMECMP_BACKUP; + } else if (partial_dir && partialptr) + fnamecmp = partialptr; + else + fnamecmp = fname; + } + + /* open the file */ + fd1 = do_open(fnamecmp, O_RDONLY, 0); + + if (fd1 == -1 && protocol_version < 29) { + if (fnamecmp != fname) { + fnamecmp = fname; + fnamecmp_type = FNAMECMP_FNAME; + fd1 = do_open(fnamecmp, O_RDONLY, 0); + } + + if (fd1 == -1 && basis_dir[0]) { + /* pre-29 allowed only one alternate basis */ + pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, + basis_dir[0], fname); + fnamecmp = fnamecmpbuf; + fnamecmp_type = FNAMECMP_BASIS_DIR_LOW; + fd1 = do_open(fnamecmp, O_RDONLY, 0); + } + } + + one_inplace = inplace_partial && fnamecmp_type == FNAMECMP_PARTIAL_DIR; + updating_basis_or_equiv = one_inplace + || (inplace && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP)); + + if (fd1 == -1) { + st.st_mode = 0; + st.st_size = 0; + } else if (do_fstat(fd1,&st) != 0) { + rsyserr(FERROR_XFER, errno, "fstat %s failed", + full_fname(fnamecmp)); + discard_receive_data(f_in, file); + close(fd1); + if (inc_recurse) + send_msg_int(MSG_NO_SEND, ndx); + continue; + } + + if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) { + /* this special handling for directories + * wouldn't be necessary if robust_rename() + * and the underlying robust_unlink could cope + * with directories + */ + rprintf(FERROR_XFER, "recv_files: %s is a directory\n", + full_fname(fnamecmp)); + discard_receive_data(f_in, file); + close(fd1); + if (inc_recurse) + send_msg_int(MSG_NO_SEND, ndx); + continue; + } + + if (write_devices && IS_DEVICE(st.st_mode)) { + if (fd1 != -1 && st.st_size == 0) + st.st_size = get_device_size(fd1, fname); + /* Mark the file entry as a device so that we don't try to truncate it later on. */ + file->mode = S_IFBLK | (file->mode & ACCESSPERMS); + } else if (fd1 != -1 && !(S_ISREG(st.st_mode))) { + close(fd1); + fd1 = -1; + } + + /* If we're not preserving permissions, change the file-list's + * mode based on the local permissions and some heuristics. */ + if (!preserve_perms) { + int exists = fd1 != -1; +#ifdef SUPPORT_ACLS + const char *dn = file->dirname ? file->dirname : "."; + if (parent_dirname != dn + && strcmp(parent_dirname, dn) != 0) { + dflt_perms = default_perms_for_dir(dn); + parent_dirname = dn; + } +#endif + file->mode = dest_mode(file->mode, st.st_mode, dflt_perms, exists); + } + + /* We now check to see if we are writing the file "inplace" */ + if (inplace || one_inplace) { + fnametmp = one_inplace ? partialptr : fname; + fd2 = do_open(fnametmp, O_WRONLY|O_CREAT, 0600); +#ifdef linux + if (fd2 == -1 && errno == EACCES) { + /* Maybe the error was due to protected_regular setting? */ + fd2 = do_open(fname, O_WRONLY, 0600); + } +#endif + if (fd2 == -1) { + rsyserr(FERROR_XFER, errno, "open %s failed", + full_fname(fnametmp)); + } else if (updating_basis_or_equiv) + cleanup_set(NULL, NULL, file, fd1, fd2); + } else { + fnametmp = fnametmpbuf; + fd2 = open_tmpfile(fnametmp, fname, file); + if (fd2 != -1) + cleanup_set(fnametmp, partialptr, file, fd1, fd2); + } + + if (fd2 == -1) { + discard_receive_data(f_in, file); + if (fd1 != -1) + close(fd1); + if (inc_recurse) + send_msg_int(MSG_NO_SEND, ndx); + continue; + } + + /* log the transfer */ + if (log_before_transfer) + log_item(FCLIENT, file, iflags, NULL); + else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1)) + rprintf(FINFO, "%s\n", fname); + + /* recv file data */ + recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size, fname, fd2, file, inplace || one_inplace); + + log_item(log_code, file, iflags, NULL); + if (want_progress_now) + instant_progress(fname); + + if (fd1 != -1) + close(fd1); + if (close(fd2) < 0) { + rsyserr(FERROR, errno, "close failed on %s", + full_fname(fnametmp)); + exit_cleanup(RERR_FILEIO); + } + + if ((recv_ok && (!delay_updates || !partialptr)) || inplace) { + if (partialptr == fname) + partialptr = NULL; + if (!finish_transfer(fname, fnametmp, fnamecmp, partialptr, file, recv_ok, 1)) + recv_ok = -1; + else if (fnamecmp == partialptr) { + if (!one_inplace) + do_unlink(partialptr); + handle_partial_dir(partialptr, PDIR_DELETE); + } + } else if (keep_partial && partialptr && (!one_inplace || delay_updates)) { + if (!handle_partial_dir(partialptr, PDIR_CREATE)) { + rprintf(FERROR, + "Unable to create partial-dir for %s -- discarding %s.\n", + local_name ? local_name : f_name(file, NULL), + recv_ok ? "completed file" : "partial file"); + do_unlink(fnametmp); + recv_ok = -1; + } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL, + file, recv_ok, !partial_dir)) + recv_ok = -1; + else if (delay_updates && recv_ok) { + bitbag_set_bit(delayed_bits, ndx); + recv_ok = 2; + } else + partialptr = NULL; + } else if (!one_inplace) + do_unlink(fnametmp); + + cleanup_disable(); + + if (read_batch) + file->flags |= FLAG_FILE_SENT; + + switch (recv_ok) { + case 2: + break; + case 1: + if (remove_source_files || inc_recurse || (preserve_hard_links && F_IS_HLINKED(file))) + send_msg_success(fname, ndx); + break; + case 0: { + enum logcode msgtype = redoing ? FERROR_XFER : FWARNING; + if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1) || stdout_format_has_i) { + char *errstr, *redostr, *keptstr; + if (!(keep_partial && partialptr) && !inplace) + keptstr = "discarded"; + else if (partial_dir) + keptstr = "put into partial-dir"; + else + keptstr = "retained"; + if (msgtype == FERROR_XFER) { + errstr = "ERROR"; + redostr = ""; + } else { + errstr = "WARNING"; + redostr = read_batch ? " (may try again)" + : " (will try again)"; + } + rprintf(msgtype, + "%s: %s failed verification -- update %s%s.\n", + errstr, local_name ? f_name(file, NULL) : fname, + keptstr, redostr); + } + if (!redoing) { + if (read_batch) + flist_ndx_push(&batch_redo_list, ndx); + send_msg_int(MSG_REDO, ndx); + file->flags |= FLAG_FILE_SENT; + } else if (inc_recurse) + send_msg_int(MSG_NO_SEND, ndx); + break; + } + case -1: + if (inc_recurse) + send_msg_int(MSG_NO_SEND, ndx); + break; + } + } + if (make_backups < 0) + make_backups = -make_backups; + + if (phase == 2 && delay_updates) /* for protocol_version < 29 */ + handle_delayed_updates(local_name); + + if (DEBUG_GTE(RECV, 1)) + rprintf(FINFO,"recv_files finished\n"); + + return 0; +} |