/* * Routines that are exclusive to the generator process. * * Copyright (C) 1996-2000 Andrew Tridgell * Copyright (C) 1996 Paul Mackerras * Copyright (C) 2002 Martin Pool * Copyright (C) 2003-2008 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" extern int dry_run; extern int do_xfers; extern int stdout_format_has_i; extern int logfile_format_has_i; extern int am_root; extern int am_server; extern int am_daemon; extern int inc_recurse; extern int relative_paths; extern int implied_dirs; extern int keep_dirlinks; extern int preserve_acls; extern int preserve_xattrs; extern int preserve_links; extern int preserve_devices; extern int preserve_specials; extern int preserve_hard_links; extern int preserve_executability; extern int preserve_perms; extern int preserve_times; extern int uid_ndx; extern int gid_ndx; extern int delete_mode; extern int delete_before; extern int delete_during; extern int delete_after; extern int msgdone_cnt; extern int ignore_errors; extern int remove_source_files; extern int delay_updates; extern int update_only; extern int ignore_existing; extern int ignore_non_existing; extern int inplace; extern int append_mode; extern int make_backups; extern int csum_length; extern int ignore_times; extern int size_only; extern OFF_T max_size; extern OFF_T min_size; extern int io_error; extern int flist_eof; extern int allowed_lull; extern int sock_f_out; extern int ignore_timeout; extern int protocol_version; extern int file_total; extern int fuzzy_basis; extern int always_checksum; extern int checksum_len; extern char *partial_dir; extern int compare_dest; extern int copy_dest; extern int link_dest; extern int whole_file; extern int list_only; extern int read_batch; extern int safe_symlinks; extern long block_size; /* "long" because popt can't set an int32. */ extern int unsort_ndx; extern int max_delete; extern int force_delete; extern int one_file_system; extern int check_for_io_err; extern struct stats stats; extern dev_t filesystem_dev; extern mode_t orig_umask; extern uid_t our_uid; extern char *backup_dir; extern char *backup_suffix; extern int backup_suffix_len; extern char *basis_dir[MAX_BASIS_DIRS+1]; extern struct file_list *cur_flist, *first_flist, *dir_flist; extern struct filter_list_struct daemon_filter_list; int ignore_perishable = 0; int non_perishable_cnt = 0; int maybe_ATTRS_REPORT = 0; static dev_t dev_zero; static int deletion_count = 0; /* used to implement --max-delete */ static int deldelay_size = 0, deldelay_cnt = 0; static char *deldelay_buf = NULL; static int deldelay_fd = -1; static int loopchk_limit; static int dir_tweaking; static int symlink_timeset_failed_flags; static int need_retouch_dir_times; static int need_retouch_dir_perms; static const char *solo_file = NULL; /* For calling delete_item() and delete_dir_contents(). */ #define DEL_NO_UID_WRITE (1<<0) /* file/dir has our uid w/o write perm */ #define DEL_RECURSE (1<<1) /* if dir, delete all contents */ #define DEL_DIR_IS_EMPTY (1<<2) /* internal delete_FUNCTIONS use only */ #define DEL_FOR_FILE (1<<3) /* making room for a replacement file */ #define DEL_FOR_DIR (1<<4) /* making room for a replacement dir */ #define DEL_FOR_SYMLINK (1<<5) /* making room for a replacement symlink */ #define DEL_FOR_DEVICE (1<<6) /* making room for a replacement device */ #define DEL_FOR_SPECIAL (1<<7) /* making room for a replacement special */ #define DEL_MAKE_ROOM (DEL_FOR_FILE|DEL_FOR_DIR|DEL_FOR_SYMLINK|DEL_FOR_DEVICE|DEL_FOR_SPECIAL) enum nonregtype { TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK }; enum delret { DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY }; /* Forward declarations. */ static enum delret delete_dir_contents(char *fname, uint16 flags); #ifdef SUPPORT_HARD_LINKS static void handle_skipped_hlink(struct file_struct *file, int itemizing, enum logcode code, int f_out); #endif static int is_backup_file(char *fn) { int k = strlen(fn) - backup_suffix_len; return k > 0 && strcmp(fn+k, backup_suffix) == 0; } /* Delete a file or directory. If DEL_RECURSE is set in the flags, this will * delete recursively. * * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's * a directory! (The buffer is used for recursion, but returned unchanged.) */ static enum delret delete_item(char *fbuf, uint16 mode, uint16 flags) { enum delret ret; char *what; int ok; if (DEBUG_GTE(DEL, 2)) { rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n", fbuf, (int)mode, (int)flags); } if (flags & DEL_NO_UID_WRITE) do_chmod(fbuf, mode | S_IWUSR); if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) { int save_uid_ndx = uid_ndx; /* This only happens on the first call to delete_item() since * delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */ if (!uid_ndx) uid_ndx = ++file_extra_cnt; ignore_perishable = 1; /* If DEL_RECURSE is not set, this just reports emptiness. */ ret = delete_dir_contents(fbuf, flags); ignore_perishable = 0; if (!save_uid_ndx) { --file_extra_cnt; uid_ndx = 0; } if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT) goto check_ret; /* OK: try to delete the directory. */ } if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && ++deletion_count > max_delete) return DR_AT_LIMIT; if (S_ISDIR(mode)) { what = "rmdir"; ok = do_rmdir(fbuf) == 0; } else if (make_backups > 0 && (backup_dir || !is_backup_file(fbuf))) { what = "make_backup"; ok = make_backup(fbuf); } else { what = "unlink"; ok = robust_unlink(fbuf) == 0; } if (ok) { if (!(flags & DEL_MAKE_ROOM)) log_delete(fbuf, mode); ret = DR_SUCCESS; } else { if (S_ISDIR(mode) && errno == ENOTEMPTY) { rprintf(FINFO, "cannot delete non-empty directory: %s\n", fbuf); ret = DR_NOT_EMPTY; } else if (errno != ENOENT) { rsyserr(FERROR, errno, "delete_file: %s(%s) failed", what, fbuf); ret = DR_FAILURE; } else { deletion_count--; ret = DR_SUCCESS; } } check_ret: if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) { const char *desc; switch (flags & DEL_MAKE_ROOM) { case DEL_FOR_FILE: desc = "regular file"; break; case DEL_FOR_DIR: desc = "directory"; break; case DEL_FOR_SYMLINK: desc = "symlink"; break; case DEL_FOR_DEVICE: desc = "device file"; break; case DEL_FOR_SPECIAL: desc = "special file"; break; default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */ } rprintf(FERROR_XFER, "could not make way for new %s: %s\n", desc, fbuf); } return ret; } /* The directory is about to be deleted: if DEL_RECURSE is given, delete all * its contents, otherwise just checks for content. Returns DR_SUCCESS or * DR_NOT_EMPTY. Note that fname must point to a MAXPATHLEN buffer! (The * buffer is used for recursion, but returned unchanged.) */ static enum delret delete_dir_contents(char *fname, uint16 flags) { struct file_list *dirlist; enum delret ret; unsigned remainder; void *save_filters; int j, dlen; char *p; if (DEBUG_GTE(DEL, 3)) { rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n", fname, flags); } dlen = strlen(fname); save_filters = push_local_filters(fname, dlen); non_perishable_cnt = 0; dirlist = get_dirlist(fname, dlen, 0); ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS; if (!dirlist->used) goto done; if (!(flags & DEL_RECURSE)) { ret = DR_NOT_EMPTY; goto done; } p = fname + dlen; if (dlen != 1 || *fname != '/') *p++ = '/'; remainder = MAXPATHLEN - (p - fname); /* We do our own recursion, so make delete_item() non-recursive. */ flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM|DEL_NO_UID_WRITE)) | DEL_DIR_IS_EMPTY; for (j = dirlist->used; j--; ) { struct file_struct *fp = dirlist->files[j]; if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) { if (DEBUG_GTE(DEL, 1)) { rprintf(FINFO, "mount point, %s, pins parent directory\n", f_name(fp, NULL)); } ret = DR_NOT_EMPTY; continue; } strlcpy(p, fp->basename, remainder); if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid) do_chmod(fname, fp->mode | S_IWUSR); /* Save stack by recursing to ourself directly. */ if (S_ISDIR(fp->mode)) { if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS) ret = DR_NOT_EMPTY; } if (delete_item(fname, fp->mode, flags) != DR_SUCCESS) ret = DR_NOT_EMPTY; } fname[dlen] = '\0'; done: flist_free(dirlist); pop_local_filters(save_filters); if (ret == DR_NOT_EMPTY) { rprintf(FINFO, "cannot delete non-empty directory: %s\n", fname); } return ret; } static int start_delete_delay_temp(void) { char fnametmp[MAXPATHLEN]; int save_dry_run = dry_run; dry_run = 0; if (!get_tmpname(fnametmp, "deldelay") || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) { rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n", inc_recurse ? "" : " -- switching to --delete-after"); delete_during = 0; delete_after = !inc_recurse; dry_run = save_dry_run; return 0; } unlink(fnametmp); dry_run = save_dry_run; return 1; } static int flush_delete_delay(void) { if (deldelay_fd < 0 && !start_delete_delay_temp()) return 0; if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) { rsyserr(FERROR, errno, "flush of delete-delay buffer"); delete_during = 0; delete_after = !inc_recurse; close(deldelay_fd); return 0; } deldelay_cnt = 0; return 1; } static int remember_delete(struct file_struct *file, const char *fname, int flags) { int len; if (deldelay_cnt == deldelay_size && !flush_delete_delay()) return 0; if (flags & DEL_NO_UID_WRITE) deldelay_buf[deldelay_cnt++] = '!'; while (1) { len = snprintf(deldelay_buf + deldelay_cnt, deldelay_size - deldelay_cnt, "%x %s%c", (int)file->mode, fname, '\0'); if ((deldelay_cnt += len) <= deldelay_size) break; deldelay_cnt -= len; if (!flush_delete_delay()) return 0; } return 1; } static int read_delay_line(char *buf, int *flags_p) { static int read_pos = 0; int j, len, mode; char *bp, *past_space; while (1) { for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {} if (j < deldelay_cnt) break; if (deldelay_fd < 0) { if (j > read_pos) goto invalid_data; return -1; } deldelay_cnt -= read_pos; if (deldelay_cnt == deldelay_size) goto invalid_data; if (deldelay_cnt && read_pos) { memmove(deldelay_buf, deldelay_buf + read_pos, deldelay_cnt); } len = read(deldelay_fd, deldelay_buf + deldelay_cnt, deldelay_size - deldelay_cnt); if (len == 0) { if (deldelay_cnt) { rprintf(FERROR, "ERROR: unexpected EOF in delete-delay file.\n"); } return -1; } if (len < 0) { rsyserr(FERROR, errno, "reading delete-delay file"); return -1; } deldelay_cnt += len; read_pos = 0; } bp = deldelay_buf + read_pos; if (*bp == '!') { bp++; *flags_p = DEL_NO_UID_WRITE; } else *flags_p = 0; if (sscanf(bp, "%x ", &mode) != 1) { invalid_data: rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n"); return -1; } past_space = strchr(bp, ' ') + 1; len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */ read_pos = j + 1; if (len > MAXPATHLEN) { rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n"); return -1; } /* The caller needs the name in a MAXPATHLEN buffer, so we copy it * instead of returning a pointer to our buffer. */ memcpy(buf, past_space, len); return mode; } static void do_delayed_deletions(char *delbuf) { int mode, flags; if (deldelay_fd >= 0) { if (deldelay_cnt && !flush_delete_delay()) return; lseek(deldelay_fd, 0, 0); } while ((mode = read_delay_line(delbuf, &flags)) >= 0) delete_item(delbuf, mode, flags | DEL_RECURSE); if (deldelay_fd >= 0) close(deldelay_fd); } /* This function is used to implement per-directory deletion, and is used by * all the --delete-WHEN options. Note that the fbuf pointer must point to a * MAXPATHLEN buffer with the name of the directory in it (the functions we * call will append names onto the end, but the old dir value will be restored * on exit). */ static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev) { static int already_warned = 0; struct file_list *dirlist; char delbuf[MAXPATHLEN]; int dlen, i; int save_uid_ndx = uid_ndx; if (!fbuf) { change_local_filter_dir(NULL, 0, 0); return; } if (DEBUG_GTE(DEL, 2)) rprintf(FINFO, "delete_in_dir(%s)\n", fbuf); if (allowed_lull) maybe_send_keepalive(); if (io_error && !ignore_errors) { if (already_warned) return; rprintf(FINFO, "IO error encountered -- skipping file deletion\n"); already_warned = 1; return; } dlen = strlen(fbuf); change_local_filter_dir(fbuf, dlen, F_DEPTH(file)); if (one_file_system) { if (file->flags & FLAG_TOP_DIR) filesystem_dev = *fs_dev; else if (filesystem_dev != *fs_dev) return; } if (!uid_ndx) uid_ndx = ++file_extra_cnt; dirlist = get_dirlist(fbuf, dlen, 0); /* If an item in dirlist is not found in flist, delete it * from the filesystem. */ for (i = dirlist->used; i--; ) { struct file_struct *fp = dirlist->files[i]; if (!F_IS_ACTIVE(fp)) continue; if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) { if (INFO_GTE(MOUNT, 1)) rprintf(FINFO, "cannot delete mount point: %s\n", f_name(fp, NULL)); continue; } if (flist_find(cur_flist, fp) < 0) { int flags = DEL_RECURSE; if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid) flags |= DEL_NO_UID_WRITE; f_name(fp, delbuf); if (delete_during == 2) { if (!remember_delete(fp, delbuf, flags)) break; } else delete_item(delbuf, fp->mode, flags); } } flist_free(dirlist); if (!save_uid_ndx) { --file_extra_cnt; uid_ndx = 0; } } /* This deletes any files on the receiving side that are not present on the * sending side. This is used by --delete-before and --delete-after. */ static void do_delete_pass(void) { char fbuf[MAXPATHLEN]; STRUCT_STAT st; int j; /* dry_run is incremented when the destination doesn't exist yet. */ if (dry_run > 1 || list_only) return; for (j = 0; j < cur_flist->used; j++) { struct file_struct *file = cur_flist->sorted[j]; f_name(file, fbuf); if (!(file->flags & FLAG_CONTENT_DIR)) { change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file)); continue; } if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR) rprintf(FINFO, "deleting in %s\n", fbuf); if (link_stat(fbuf, &st, keep_dirlinks) < 0 || !S_ISDIR(st.st_mode)) continue; delete_in_dir(fbuf, file, &st.st_dev); } delete_in_dir(NULL, NULL, &dev_zero); if (INFO_GTE(FLIST, 2) && !am_server) rprintf(FINFO, " \r"); } int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp) { #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES if (S_ISLNK(file->mode)) { ; } else #endif if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0) return 0; if (preserve_perms) { if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS)) return 0; } else if (preserve_executability && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0))) return 0; if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file)) return 0; if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file)) return 0; #ifdef SUPPORT_ACLS if (preserve_acls && !S_ISLNK(file->mode)) { if (!ACL_READY(*sxp)) get_acl(fname, sxp); if (set_acl(NULL, file, sxp) == 0) return 0; } #endif #ifdef SUPPORT_XATTRS if (preserve_xattrs) { if (!XATTR_READY(*sxp)) get_xattr(fname, sxp); if (xattr_diff(file, sxp, 0)) return 0; } #endif return 1; } void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret, stat_x *sxp, int32 iflags, uchar fnamecmp_type, const char *xname) { if (statret >= 0) { /* A from-dest-dir statret can == 1! */ int keep_time = !preserve_times ? 0 : S_ISDIR(file->mode) ? preserve_times > 1 : #if defined HAVE_LUTIMES && defined HAVE_UTIMES 1; #else !S_ISLNK(file->mode); #endif if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size) iflags |= ITEM_REPORT_SIZE; if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */ if (iflags & ITEM_LOCAL_CHANGE) iflags |= symlink_timeset_failed_flags; } else if (keep_time ? cmp_time(file->modtime, sxp->st.st_mtime) != 0 : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED) && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname)) iflags |= ITEM_REPORT_TIME; #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST if (S_ISLNK(file->mode)) { ; } else #endif if (preserve_perms) { if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS)) iflags |= ITEM_REPORT_PERMS; } else if (preserve_executability && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0))) iflags |= ITEM_REPORT_PERMS; if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid) iflags |= ITEM_REPORT_OWNER; if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file)) iflags |= ITEM_REPORT_GROUP; #ifdef SUPPORT_ACLS if (preserve_acls && !S_ISLNK(file->mode)) { if (!ACL_READY(*sxp)) get_acl(fnamecmp, sxp); if (set_acl(NULL, file, sxp) == 0) iflags |= ITEM_REPORT_ACL; } #endif #ifdef SUPPORT_XATTRS if (preserve_xattrs) { if (!XATTR_READY(*sxp)) get_xattr(fnamecmp, sxp); if (xattr_diff(file, sxp, 1)) iflags |= ITEM_REPORT_XATTR; } #endif } else { #ifdef SUPPORT_XATTRS if (preserve_xattrs && xattr_diff(file, NULL, 1)) iflags |= ITEM_REPORT_XATTR; #endif iflags |= ITEM_IS_NEW; } iflags &= 0xffff; if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2) || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) { if (protocol_version >= 29) { if (ndx >= 0) write_ndx(sock_f_out, ndx); write_shortint(sock_f_out, iflags); if (iflags & ITEM_BASIS_TYPE_FOLLOWS) write_byte(sock_f_out, fnamecmp_type); if (iflags & ITEM_XNAME_FOLLOWS) write_vstring(sock_f_out, xname, strlen(xname)); #ifdef SUPPORT_XATTRS if (preserve_xattrs && !dry_run && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) { send_xattr_request(NULL, file, iflags & ITEM_REPORT_XATTR ? sock_f_out : -1); } #endif } else if (ndx >= 0) { enum logcode code = logfile_format_has_i ? FINFO : FCLIENT; log_item(code, file, &stats, iflags, xname); } } } /* Perform our quick-check heuristic for determining if a file is unchanged. */ int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st) { if (st->st_size != F_LENGTH(file)) return 0; /* if always checksum is set then we use the checksum instead of the file time to determine whether to sync */ if (always_checksum > 0 && S_ISREG(st->st_mode)) { char sum[MAX_DIGEST_LEN]; file_checksum(fn, sum, st->st_size); return memcmp(sum, F_SUM(file), checksum_len) == 0; } if (size_only > 0) return 1; if (ignore_times) return 0; return cmp_time(st->st_mtime, file->modtime) == 0; } /* * set (initialize) the size entries in the per-file sum_struct * calculating dynamic block and checksum sizes. * * This is only called from generate_and_send_sums() but is a separate * function to encapsulate the logic. * * The block size is a rounded square root of file length. * * The checksum size is determined according to: * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len) * provided by Donovan Baarda which gives a probability of rsync * algorithm corrupting data and falling back using the whole md4 * checksums. * * This might be made one of several selectable heuristics. */ static void sum_sizes_sqroot(struct sum_struct *sum, int64 len) { int32 blength; int s2length; int64 l; if (block_size) blength = block_size; else if (len <= BLOCK_SIZE * BLOCK_SIZE) blength = BLOCK_SIZE; else { int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE; int32 c; int cnt; for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {} if (c < 0 || c >= max_blength) blength = max_blength; else { blength = 0; do { blength |= c; if (len < (int64)blength * blength) blength &= ~c; c >>= 1; } while (c >= 8); /* round to multiple of 8 */ blength = MAX(blength, BLOCK_SIZE); } } if (protocol_version < 27) { s2length = csum_length; } else if (csum_length == SUM_LENGTH) { s2length = SUM_LENGTH; } else { int32 c; int b = BLOCKSUM_BIAS; for (l = len; l >>= 1; b += 2) {} for (c = blength; (c >>= 1) && b; b--) {} /* add a bit, subtract rollsum, round up. */ s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */ s2length = MAX(s2length, csum_length); s2length = MIN(s2length, SUM_LENGTH); } sum->flength = len; sum->blength = blength; sum->s2length = s2length; sum->remainder = (int32)(len % blength); sum->count = (int32)(l = (len / blength) + (sum->remainder != 0)); if ((int64)sum->count != l) sum->count = -1; if (sum->count && DEBUG_GTE(DELTASUM, 2)) { rprintf(FINFO, "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n", big_num(sum->count, 0), (long)sum->remainder, (long)sum->blength, sum->s2length, big_num(sum->flength, 0)); } } /* * Generate and send a stream of signatures/checksums that describe a buffer * * Generate approximately one checksum every block_len bytes. */ static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy) { int32 i; struct map_struct *mapbuf; struct sum_struct sum; OFF_T offset = 0; sum_sizes_sqroot(&sum, len); if (sum.count < 0) return -1; write_sum_head(f_out, &sum); if (append_mode > 0 && f_copy < 0) return 0; if (len > 0) mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength); else mapbuf = NULL; for (i = 0; i < sum.count; i++) { int32 n1 = (int32)MIN(len, (OFF_T)sum.blength); char *map = map_ptr(mapbuf, offset, n1); char sum2[SUM_LENGTH]; uint32 sum1; len -= n1; offset += n1; if (f_copy >= 0) { full_write(f_copy, map, n1); if (append_mode > 0) continue; } sum1 = get_checksum1(map, n1); get_checksum2(map, n1, sum2); if (DEBUG_GTE(DELTASUM, 3)) { rprintf(FINFO, "chunk[%s] offset=%s len=%ld sum1=%08lx\n", big_num(i, 0), big_num(offset - n1, 0), (long)n1, (unsigned long)sum1); } write_int(f_out, sum1); write_buf(f_out, sum2, sum.s2length); } if (mapbuf) unmap_file(mapbuf); return 0; } /* Try to find a filename in the same dir as "fname" with a similar name. */ static int find_fuzzy(struct file_struct *file, struct file_list *dirlist) { int fname_len, fname_suf_len; const char *fname_suf, *fname = file->basename; uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */ int j, lowest_j = -1; fname_len = strlen(fname); fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len); for (j = 0; j < dirlist->used; j++) { struct file_struct *fp = dirlist->files[j]; const char *suf, *name; int len, suf_len; uint32 dist; if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT) continue; name = fp->basename; if (F_LENGTH(fp) == F_LENGTH(file) && cmp_time(fp->modtime, file->modtime) == 0) { if (DEBUG_GTE(FUZZY, 2)) { rprintf(FINFO, "fuzzy size/modtime match for %s\n", name); } return j; } len = strlen(name); suf = find_filename_suffix(name, len, &suf_len); dist = fuzzy_distance(name, len, fname, fname_len); /* Add some extra weight to how well the suffixes match. */ dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10; if (DEBUG_GTE(FUZZY, 2)) { rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n", name, (int)(dist>>16), (int)(dist&0xFFFF)); } if (dist <= lowest_dist) { lowest_dist = dist; lowest_j = j; } } return lowest_j; } /* Copy a file found in our --copy-dest handling. */ static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file) { char buf[MAXPATHLEN]; const char *copy_to, *partialptr; int save_preserve_xattrs = preserve_xattrs; int ok, fd_w; if (inplace) { /* Let copy_file open the destination in place. */ fd_w = -1; copy_to = dest; } else { fd_w = open_tmpfile(buf, dest, file); if (fd_w < 0) return -1; copy_to = buf; } cleanup_set(copy_to, NULL, NULL, -1, -1); if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) { if (INFO_GTE(COPY, 1)) { rsyserr(FINFO, errno, "copy_file %s => %s", full_fname(src), copy_to); } /* Try to clean up. */ unlink(copy_to); cleanup_disable(); return -1; } partialptr = partial_dir ? partial_dir_fname(dest) : NULL; preserve_xattrs = 0; /* xattrs were copied with file */ ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0); preserve_xattrs = save_preserve_xattrs; cleanup_disable(); return ok ? 0 : -1; } /* This is only called for regular files. We return -2 if we've finished * handling the file, -1 if no dest-linking occurred, or a non-negative * value if we found an alternate basis file. */ static int try_dests_reg(struct file_struct *file, char *fname, int ndx, char *cmpbuf, stat_x *sxp, int itemizing, enum logcode code) { int best_match = -1; int match_level = 0; int j = 0; do { pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname); if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode)) continue; switch (match_level) { case 0: best_match = j; match_level = 1; /* FALL THROUGH */ case 1: if (!unchanged_file(cmpbuf, file, &sxp->st)) continue; best_match = j; match_level = 2; /* FALL THROUGH */ case 2: if (!unchanged_attrs(cmpbuf, file, sxp)) continue; best_match = j; match_level = 3; break; } break; } while (basis_dir[++j] != NULL); if (!match_level) return -1; if (j != best_match) { j = best_match; pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname); if (link_stat(cmpbuf, &sxp->st, 0) < 0) return -1; } if (match_level == 3 && !copy_dest) { #ifdef SUPPORT_HARD_LINKS if (link_dest) { if (!hard_link_one(file, fname, cmpbuf, 1)) goto try_a_copy; if (preserve_hard_links && F_IS_HLINKED(file)) finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j); if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) { itemize(cmpbuf, file, ndx, 1, sxp, ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS, 0, ""); } } else #endif if (itemizing) itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL); if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) rprintf(FCLIENT, "%s is uptodate\n", fname); return -2; } if (match_level >= 2) { #ifdef SUPPORT_HARD_LINKS try_a_copy: /* Copy the file locally. */ #endif if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) return -1; if (itemizing) itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL); if (maybe_ATTRS_REPORT && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2) || (INFO_GTE(NAME, 2) && match_level == 3))) { code = match_level == 3 ? FCLIENT : FINFO; rprintf(code, "%s%s\n", fname, match_level == 3 ? " is uptodate" : ""); } #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && F_IS_HLINKED(file)) finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1); #endif return -2; } return FNAMECMP_BASIS_DIR_LOW + j; } /* This is only called for non-regular files. We return -2 if we've finished * handling the file, or -1 if no dest-linking occurred, or a non-negative * value if we found an alternate basis file. */ static int try_dests_non(struct file_struct *file, char *fname, int ndx, char *cmpbuf, stat_x *sxp, int itemizing, enum logcode code) { char lnk[MAXPATHLEN]; int best_match = -1; int match_level = 0; enum nonregtype type; uint32 *devp; int len, j = 0; #ifndef SUPPORT_LINKS if (S_ISLNK(file->mode)) return -1; #endif if (S_ISDIR(file->mode)) { type = TYPE_DIR; } else if (IS_SPECIAL(file->mode)) type = TYPE_SPECIAL; else if (IS_DEVICE(file->mode)) type = TYPE_DEVICE; #ifdef SUPPORT_LINKS else if (S_ISLNK(file->mode)) type = TYPE_SYMLINK; #endif else { rprintf(FERROR, "internal: try_dests_non() called with invalid mode (%o)\n", (int)file->mode); exit_cleanup(RERR_UNSUPPORTED); } do { pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname); if (link_stat(cmpbuf, &sxp->st, 0) < 0) continue; switch (type) { case TYPE_DIR: if (!S_ISDIR(sxp->st.st_mode)) continue; break; case TYPE_SPECIAL: if (!IS_SPECIAL(sxp->st.st_mode)) continue; break; case TYPE_DEVICE: if (!IS_DEVICE(sxp->st.st_mode)) continue; break; #ifdef SUPPORT_LINKS case TYPE_SYMLINK: if (!S_ISLNK(sxp->st.st_mode)) continue; break; #endif } if (match_level < 1) { match_level = 1; best_match = j; } switch (type) { case TYPE_DIR: break; case TYPE_SPECIAL: case TYPE_DEVICE: devp = F_RDEV_P(file); if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp))) continue; break; #ifdef SUPPORT_LINKS case TYPE_SYMLINK: if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0) continue; lnk[len] = '\0'; if (strcmp(lnk, F_SYMLINK(file)) != 0) continue; break; #endif } if (match_level < 2) { match_level = 2; best_match = j; } if (unchanged_attrs(cmpbuf, file, sxp)) { match_level = 3; best_match = j; break; } } while (basis_dir[++j] != NULL); if (!match_level) return -1; if (j != best_match) { j = best_match; pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname); if (link_stat(cmpbuf, &sxp->st, 0) < 0) return -1; } if (match_level == 3) { #ifdef SUPPORT_HARD_LINKS if (link_dest #ifndef CAN_HARDLINK_SYMLINK && !S_ISLNK(file->mode) #endif #ifndef CAN_HARDLINK_SPECIAL && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode) #endif && !S_ISDIR(file->mode)) { if (do_link(cmpbuf, fname) < 0) { rsyserr(FERROR_XFER, errno, "failed to hard-link %s with %s", cmpbuf, fname); return j; } if (preserve_hard_links && F_IS_HLINKED(file)) finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1); } else #endif match_level = 2; if (itemizing && stdout_format_has_i && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) { int chg = compare_dest && type != TYPE_DIR ? 0 : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0); char *lp = match_level == 3 ? "" : NULL; itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp); } if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) { rprintf(FCLIENT, "%s%s is uptodate\n", fname, type == TYPE_DIR ? "/" : ""); } return -2; } return j; } static void list_file_entry(struct file_struct *f) { char permbuf[PERMSTRING_SIZE]; int64 len; if (!F_IS_ACTIVE(f)) { /* this can happen if duplicate names were removed */ return; } permstring(permbuf, f->mode); len = F_LENGTH(f); /* TODO: indicate '+' if the entry has an ACL. */ #ifdef SUPPORT_LINKS if (preserve_links && S_ISLNK(f->mode)) { rprintf(FINFO, "%s %11s %s %s -> %s\n", permbuf, big_num(len, 0), timestring(f->modtime), f_name(f, NULL), F_SYMLINK(f)); } else #endif { rprintf(FINFO, "%s %11s %s %s\n", permbuf, big_num(len, 0), timestring(f->modtime), f_name(f, NULL)); } } static int phase = 0; static int dflt_perms; static int implied_dirs_are_missing; /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */ static BOOL is_below(struct file_struct *file, struct file_struct *subtree) { return F_DEPTH(file) > F_DEPTH(subtree) && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree)); } /* Acts on the indicated item in cur_flist whose name is fname. If a dir, * make sure it exists, and has the right permissions/timestamp info. For * all other non-regular files (symlinks, etc.) we create them here. For * regular files that have changed, we try to find a basis file and then * start sending checksums. The ndx is the file's unique index value. * * The fname parameter must point to a MAXPATHLEN buffer! (e.g it gets * passed to delete_item(), which can use it during a recursive delete.) * * Note that f_out is set to -1 when doing final directory-permission and * modification-time repair. */ static void recv_generator(char *fname, struct file_struct *file, int ndx, int itemizing, enum logcode code, int f_out) { static const char *parent_dirname = ""; /* Missing dir not created due to --dry-run; will still be scanned. */ static struct file_struct *dry_missing_dir = NULL; /* Missing dir whose contents are skipped altogether due to * --ignore-non-existing, daemon exclude, or mkdir failure. */ static struct file_struct *skip_dir = NULL; static struct file_list *fuzzy_dirlist = NULL; static int need_fuzzy_dirlist = 0; struct file_struct *fuzzy_file = NULL; int fd = -1, f_copy = -1; stat_x sx, real_sx; STRUCT_STAT partial_st; struct file_struct *back_file = NULL; int statret, real_ret, stat_errno; char *fnamecmp, *partialptr, *backupptr = NULL; char fnamecmpbuf[MAXPATHLEN]; uchar fnamecmp_type; int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0; int is_dir = !S_ISDIR(file->mode) ? 0 : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1 : 1; if (DEBUG_GTE(GENR, 1)) rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx); if (list_only) { if (is_dir < 0 || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR)) return; list_file_entry(file); return; } if (skip_dir) { if (is_below(file, skip_dir)) { if (is_dir) file->flags |= FLAG_MISSING_DIR; #ifdef SUPPORT_HARD_LINKS else if (F_IS_HLINKED(file)) handle_skipped_hlink(file, itemizing, code, f_out); #endif return; } skip_dir = NULL; } if (daemon_filter_list.head && (*fname != '.' || fname[1])) { if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) { if (is_dir < 0) return; #ifdef SUPPORT_HARD_LINKS if (F_IS_HLINKED(file)) handle_skipped_hlink(file, itemizing, code, f_out); #endif rprintf(FERROR_XFER, "skipping daemon-excluded %s \"%s\"\n", is_dir ? "directory" : "file", fname); if (is_dir) goto skipping_dir_contents; return; } } #ifdef SUPPORT_ACLS sx.acc_acl = sx.def_acl = NULL; #endif #ifdef SUPPORT_XATTRS sx.xattr = NULL; #endif if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) { parent_is_dry_missing: if (fuzzy_dirlist) { flist_free(fuzzy_dirlist); fuzzy_dirlist = NULL; } parent_dirname = ""; statret = -1; stat_errno = ENOENT; } else { const char *dn = file->dirname ? file->dirname : "."; dry_missing_dir = NULL; if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) { if (relative_paths && !implied_dirs && do_stat(dn, &sx.st) < 0) { if (dry_run) goto parent_is_dry_missing; if (create_directory_path(fname) < 0) { rsyserr(FERROR_XFER, errno, "recv_generator: mkdir %s failed", full_fname(dn)); } } if (fuzzy_dirlist) { flist_free(fuzzy_dirlist); fuzzy_dirlist = NULL; } if (fuzzy_basis) need_fuzzy_dirlist = 1; #ifdef SUPPORT_ACLS if (!preserve_perms) dflt_perms = default_perms_for_dir(dn); #endif } parent_dirname = dn; if (need_fuzzy_dirlist && S_ISREG(file->mode)) { strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf); fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1); need_fuzzy_dirlist = 0; } statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir); stat_errno = errno; } if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) { if (is_dir) { if (is_dir < 0) return; skip_dir = file; file->flags |= FLAG_MISSING_DIR; } #ifdef SUPPORT_HARD_LINKS else if (F_IS_HLINKED(file)) handle_skipped_hlink(file, itemizing, code, f_out); #endif if (INFO_GTE(SKIP, 1)) { rprintf(FINFO, "not creating new %s \"%s\"\n", is_dir ? "directory" : "file", fname); } return; } if (statret == 0 && !(sx.st.st_mode & S_IWUSR) && !am_root && sx.st.st_uid == our_uid) del_opts |= DEL_NO_UID_WRITE; if (ignore_existing > 0 && statret == 0 && (!is_dir || !S_ISDIR(sx.st.st_mode))) { if (INFO_GTE(SKIP, 1) && is_dir >= 0) rprintf(FINFO, "%s exists\n", fname); #ifdef SUPPORT_HARD_LINKS if (F_IS_HLINKED(file)) handle_skipped_hlink(file, itemizing, code, f_out); #endif goto cleanup; } if (is_dir) { if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR) goto cleanup; if (is_dir < 0) { /* In inc_recurse mode we want to make sure any missing * directories get created while we're still processing * the parent dir (which allows us to touch the parent * dir's mtime right away). We will handle the dir in * full later (right before we handle its contents). */ if (statret == 0 && (S_ISDIR(sx.st.st_mode) || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)) goto cleanup; /* Any errors get reported later. */ if (do_mkdir(fname, file->mode & 0700) == 0) file->flags |= FLAG_DIR_CREATED; goto cleanup; } /* The file to be received is a directory, so we need * to prepare appropriately. If there is already a * file of that name and it is *not* a directory, then * we need to delete it. If it doesn't exist, then * (perhaps recursively) create it. */ if (statret == 0 && !S_ISDIR(sx.st.st_mode)) { if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0) goto skipping_dir_contents; statret = -1; } if (dry_run && statret != 0) { if (!dry_missing_dir) dry_missing_dir = file; file->flags |= FLAG_MISSING_DIR; } real_ret = statret; real_sx = sx; if (file->flags & FLAG_DIR_CREATED) statret = -1; if (!preserve_perms) { /* See comment in non-dir code below. */ file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms, statret == 0); } if (statret != 0 && basis_dir[0] != NULL) { int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code); if (j == -2) { itemizing = 0; code = FNONE; statret = 1; } else if (j >= 0) statret = 1; } if (itemizing && f_out != -1) { itemize(fname, file, ndx, statret, &sx, statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL); } if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) { if (!relative_paths || errno != ENOENT || create_directory_path(fname) < 0 || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) { rsyserr(FERROR_XFER, errno, "recv_generator: mkdir %s failed", full_fname(fname)); skipping_dir_contents: rprintf(FERROR, "*** Skipping any contents from this failed directory ***\n"); skip_dir = file; file->flags |= FLAG_MISSING_DIR; goto cleanup; } } #ifdef SUPPORT_XATTRS if (preserve_xattrs && statret == 1) copy_xattrs(fnamecmpbuf, fname); #endif if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0) && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1) rprintf(code, "%s/\n", fname); /* We need to ensure that the dirs in the transfer have writable * permissions during the time we are putting files within them. * This is then fixed after the transfer is done. */ #ifdef HAVE_CHMOD if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) { mode_t mode = file->mode | S_IWUSR; if (do_chmod(fname, mode) < 0) { rsyserr(FERROR_XFER, errno, "failed to modify permissions on %s", full_fname(fname)); } need_retouch_dir_perms = 1; } #endif if (real_ret != 0 && one_file_system) real_sx.st.st_dev = filesystem_dev; if (inc_recurse) { if (one_file_system) { uint32 *devp = F_DIR_DEV_P(file); DEV_MAJOR(devp) = major(real_sx.st.st_dev); DEV_MINOR(devp) = minor(real_sx.st.st_dev); } } else if (delete_during && f_out != -1 && !phase && !(file->flags & FLAG_MISSING_DIR)) { if (file->flags & FLAG_CONTENT_DIR) delete_in_dir(fname, file, &real_sx.st.st_dev); else change_local_filter_dir(fname, strlen(fname), F_DEPTH(file)); } goto cleanup; } /* 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 = statret == 0 && !S_ISDIR(sx.st.st_mode); file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms, exists); } #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && F_HLINK_NOT_FIRST(file) && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code)) goto cleanup; #endif if (preserve_links && S_ISLNK(file->mode)) { #ifdef SUPPORT_LINKS const char *sl = F_SYMLINK(file); if (safe_symlinks && unsafe_symlink(sl, fname)) { if (INFO_GTE(NAME, 1)) { if (solo_file) fname = f_name(file, NULL); rprintf(FINFO, "ignoring unsafe symlink %s -> \"%s\"\n", full_fname(fname), sl); } return; } if (statret == 0) { char lnk[MAXPATHLEN]; int len; if (!S_ISLNK(sx.st.st_mode)) statret = -1; else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0 && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') { /* The link is pointing to the right place. */ set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT); if (itemizing) itemize(fname, file, ndx, 0, &sx, 0, 0, NULL); #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK if (preserve_hard_links && F_IS_HLINKED(file)) finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1); #endif if (remove_source_files == 1) goto return_with_success; goto cleanup; } /* Not the right symlink (or not a symlink), so * delete it. */ if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0) goto cleanup; } else if (basis_dir[0] != NULL) { int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code); if (j == -2) { #ifndef CAN_HARDLINK_SYMLINK if (link_dest) { /* Resort to --copy-dest behavior. */ } else #endif if (!copy_dest) goto cleanup; itemizing = 0; code = FNONE; } else if (j >= 0) statret = 1; } #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && F_HLINK_NOT_LAST(file)) { cur_flist->in_progress++; goto cleanup; } #endif if (do_symlink(sl, fname) != 0) { rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed", full_fname(fname), sl); } else { set_file_attrs(fname, file, NULL, NULL, 0); if (itemizing) { itemize(fname, file, ndx, statret, &sx, ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL); } if (code != FNONE && INFO_GTE(NAME, 1)) rprintf(code, "%s -> %s\n", fname, sl); #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && F_IS_HLINKED(file)) finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1); #endif /* This does not check remove_source_files == 1 * because this is one of the items that the old * --remove-sent-files option would remove. */ if (remove_source_files) goto return_with_success; } #endif goto cleanup; } if ((am_root && preserve_devices && IS_DEVICE(file->mode)) || (preserve_specials && IS_SPECIAL(file->mode))) { uint32 *devp = F_RDEV_P(file); dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)); if (statret == 0) { int del_for_flag; if (IS_DEVICE(file->mode)) { if (!IS_DEVICE(sx.st.st_mode)) statret = -1; del_for_flag = DEL_FOR_DEVICE; } else { if (!IS_SPECIAL(sx.st.st_mode)) statret = -1; del_for_flag = DEL_FOR_SPECIAL; } if (statret == 0 && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT) && sx.st.st_rdev == rdev) { /* The device or special file is identical. */ set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT); if (itemizing) itemize(fname, file, ndx, 0, &sx, 0, 0, NULL); #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && F_IS_HLINKED(file)) finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1); #endif if (remove_source_files == 1) goto return_with_success; goto cleanup; } if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0) goto cleanup; } else if (basis_dir[0] != NULL) { int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code); if (j == -2) { #ifndef CAN_HARDLINK_SPECIAL if (link_dest) { /* Resort to --copy-dest behavior. */ } else #endif if (!copy_dest) goto cleanup; itemizing = 0; code = FNONE; } else if (j >= 0) statret = 1; } #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && F_HLINK_NOT_LAST(file)) { cur_flist->in_progress++; goto cleanup; } #endif if (DEBUG_GTE(GENR, 1)) { rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n", fname, (int)file->mode, (long)major(rdev), (long)minor(rdev)); } if (do_mknod(fname, file->mode, rdev) < 0) { rsyserr(FERROR_XFER, errno, "mknod %s failed", full_fname(fname)); } else { set_file_attrs(fname, file, NULL, NULL, 0); if (itemizing) { itemize(fname, file, ndx, statret, &sx, ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL); } if (code != FNONE && INFO_GTE(NAME, 1)) rprintf(code, "%s\n", fname); #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && F_IS_HLINKED(file)) finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1); #endif if (remove_source_files == 1) goto return_with_success; } goto cleanup; } if (!S_ISREG(file->mode)) { if (solo_file) fname = f_name(file, NULL); rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname); goto cleanup; } if (max_size > 0 && F_LENGTH(file) > max_size) { if (INFO_GTE(SKIP, 1)) { if (solo_file) fname = f_name(file, NULL); rprintf(FINFO, "%s is over max-size\n", fname); } goto cleanup; } if (min_size > 0 && F_LENGTH(file) < min_size) { if (INFO_GTE(SKIP, 1)) { if (solo_file) fname = f_name(file, NULL); rprintf(FINFO, "%s is under min-size\n", fname); } goto cleanup; } if (update_only > 0 && statret == 0 && cmp_time(sx.st.st_mtime, file->modtime) > 0) { if (INFO_GTE(SKIP, 1)) rprintf(FINFO, "%s is newer\n", fname); #ifdef SUPPORT_HARD_LINKS if (F_IS_HLINKED(file)) handle_skipped_hlink(file, itemizing, code, f_out); #endif goto cleanup; } fnamecmp = fname; fnamecmp_type = FNAMECMP_FNAME; if (statret == 0 && !S_ISREG(sx.st.st_mode)) { if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0) goto cleanup; statret = -1; stat_errno = ENOENT; } if (statret != 0 && basis_dir[0] != NULL) { int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code); if (j == -2) { if (remove_source_files == 1) goto return_with_success; goto cleanup; } if (j >= 0) { fnamecmp = fnamecmpbuf; fnamecmp_type = j; statret = 0; } } real_ret = statret; real_sx = sx; if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL && link_stat(partialptr, &partial_st, 0) == 0 && S_ISREG(partial_st.st_mode)) { if (statret != 0) goto prepare_to_open; } else partialptr = NULL; if (statret != 0 && fuzzy_dirlist) { int j = find_fuzzy(file, fuzzy_dirlist); if (j >= 0) { fuzzy_file = fuzzy_dirlist->files[j]; f_name(fuzzy_file, fnamecmpbuf); if (DEBUG_GTE(FUZZY, 1)) { rprintf(FINFO, "fuzzy basis selected for %s: %s\n", fname, fnamecmpbuf); } sx.st.st_size = F_LENGTH(fuzzy_file); statret = 0; fnamecmp = fnamecmpbuf; fnamecmp_type = FNAMECMP_FUZZY; } } if (statret != 0) { #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && F_HLINK_NOT_LAST(file)) { cur_flist->in_progress++; goto cleanup; } #endif if (stat_errno == ENOENT) goto notify_others; rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s", full_fname(fname)); goto cleanup; } if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH) ; else if (fnamecmp_type == FNAMECMP_FUZZY) ; else if (unchanged_file(fnamecmp, file, &sx.st)) { if (partialptr) { do_unlink(partialptr); handle_partial_dir(partialptr, PDIR_DELETE); } set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT); if (itemizing) itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL); #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && F_IS_HLINKED(file)) finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1); #endif if (remove_source_files != 1) goto cleanup; return_with_success: if (!dry_run) send_msg_int(MSG_SUCCESS, ndx); goto cleanup; } if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) { #ifdef SUPPORT_HARD_LINKS if (F_IS_HLINKED(file)) handle_skipped_hlink(file, itemizing, code, f_out); #endif goto cleanup; } prepare_to_open: if (partialptr) { sx.st = partial_st; fnamecmp = partialptr; fnamecmp_type = FNAMECMP_PARTIAL_DIR; statret = 0; } if (!do_xfers) goto notify_others; if (read_batch || whole_file) { if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) { if (!(backupptr = get_backup_name(fname))) goto cleanup; if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) goto pretend_missing; if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) { unmake_file(back_file); back_file = NULL; goto cleanup; } } goto notify_others; } if (fuzzy_dirlist) { int j = flist_find(fuzzy_dirlist, file); if (j >= 0) /* don't use changing file as future fuzzy basis */ fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT; } /* open the file */ if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) { rsyserr(FERROR, errno, "failed to open %s, continuing", full_fname(fnamecmp)); pretend_missing: /* pretend the file didn't exist */ #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && F_HLINK_NOT_LAST(file)) { cur_flist->in_progress++; goto cleanup; } #endif statret = real_ret = -1; goto notify_others; } if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) { if (!(backupptr = get_backup_name(fname))) { close(fd); goto cleanup; } if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) { close(fd); goto pretend_missing; } if (robust_unlink(backupptr) && errno != ENOENT) { rsyserr(FERROR_XFER, errno, "unlink %s", full_fname(backupptr)); unmake_file(back_file); back_file = NULL; close(fd); goto cleanup; } if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) { int save_errno = errno ? errno : EINVAL; /* 0 paranoia */ if (errno == ENOENT && make_bak_dir(backupptr) == 0) { if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) save_errno = errno ? errno : save_errno; else save_errno = 0; } if (save_errno) { rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(backupptr)); unmake_file(back_file); back_file = NULL; close(fd); goto cleanup; } } fnamecmp_type = FNAMECMP_BACKUP; } if (DEBUG_GTE(DELTASUM, 3)) { rprintf(FINFO, "gen mapped %s of size %s\n", fnamecmp, big_num(sx.st.st_size, 0)); } if (DEBUG_GTE(DELTASUM, 2)) rprintf(FINFO, "generating and sending sums for %d\n", ndx); notify_others: if (remove_source_files && !delay_updates && !phase && !dry_run) increment_active_files(ndx, itemizing, code); if (inc_recurse && !dry_run) cur_flist->in_progress++; #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && F_IS_HLINKED(file)) file->flags |= FLAG_FILE_SENT; #endif write_ndx(f_out, ndx); if (itemizing) { int iflags = ITEM_TRANSFER; if (always_checksum > 0) iflags |= ITEM_REPORT_CHANGE; if (fnamecmp_type != FNAMECMP_FNAME) iflags |= ITEM_BASIS_TYPE_FOLLOWS; if (fnamecmp_type == FNAMECMP_FUZZY) iflags |= ITEM_XNAME_FOLLOWS; itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type, fuzzy_file ? fuzzy_file->basename : NULL); #ifdef SUPPORT_ACLS if (preserve_acls) free_acl(&real_sx); #endif #ifdef SUPPORT_XATTRS if (preserve_xattrs) free_xattr(&real_sx); #endif } if (!do_xfers) { #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && F_IS_HLINKED(file)) finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1); #endif goto cleanup; } if (read_batch) goto cleanup; if (statret != 0 || whole_file) write_sum_head(f_out, NULL); else if (sx.st.st_size <= 0) { write_sum_head(f_out, NULL); close(fd); } else { if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) { rprintf(FWARNING, "WARNING: file is too large for checksum sending: %s\n", fnamecmp); write_sum_head(f_out, NULL); } close(fd); } cleanup: if (back_file) { int save_preserve_xattrs = preserve_xattrs; if (f_copy >= 0) close(f_copy); #ifdef SUPPORT_XATTRS if (preserve_xattrs) { copy_xattrs(fname, backupptr); preserve_xattrs = 0; } #endif set_file_attrs(backupptr, back_file, NULL, NULL, 0); preserve_xattrs = save_preserve_xattrs; if (INFO_GTE(BACKUP, 1)) { rprintf(FINFO, "backed up %s to %s\n", fname, backupptr); } unmake_file(back_file); } #ifdef SUPPORT_ACLS if (preserve_acls) free_acl(&sx); #endif #ifdef SUPPORT_XATTRS if (preserve_xattrs) free_xattr(&sx); #endif return; } #ifdef SUPPORT_HARD_LINKS static void handle_skipped_hlink(struct file_struct *file, int itemizing, enum logcode code, int f_out) { char fbuf[MAXPATHLEN]; int new_last_ndx; struct file_list *save_flist = cur_flist; /* If we skip the last item in a chain of links and there was a * prior non-skipped hard-link waiting to finish, finish it now. */ if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0) return; file = cur_flist->files[new_last_ndx - cur_flist->ndx_start]; cur_flist->in_progress--; /* undo prior increment */ f_name(file, fbuf); recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out); cur_flist = save_flist; } #endif static void touch_up_dirs(struct file_list *flist, int ndx) { static int counter = 0; struct file_struct *file; char *fname; int i, start, end; if (ndx < 0) { start = 0; end = flist->used - 1; } else start = end = ndx; /* Fix any directory permissions that were modified during the * transfer and/or re-set any tweaked modified-time values. */ for (i = start; i <= end; i++, counter++) { file = flist->files[i]; if (!S_ISDIR(file->mode) || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)) continue; if (DEBUG_GTE(TIME, 2)) { fname = f_name(file, NULL); rprintf(FINFO, "touch_up_dirs: %s (%d)\n", NS(fname), i); } if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR || (!need_retouch_dir_times && file->mode & S_IWUSR)) continue; fname = f_name(file, NULL); if (!(file->mode & S_IWUSR)) do_chmod(fname, file->mode); if (need_retouch_dir_times) { STRUCT_STAT st; if (link_stat(fname, &st, 0) == 0 && cmp_time(st.st_mtime, file->modtime) != 0) set_modtime(fname, file->modtime, file->mode); } if (counter >= loopchk_limit) { if (allowed_lull) maybe_send_keepalive(); else maybe_flush_socket(0); counter = 0; } } } void check_for_finished_files(int itemizing, enum logcode code, int check_redo) { struct file_struct *file; struct file_list *flist; char fbuf[MAXPATHLEN]; int ndx; while (1) { #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && (ndx = get_hlink_num()) != -1) { flist = flist_for_ndx(ndx, "check_for_finished_files.1"); file = flist->files[ndx - flist->ndx_start]; assert(file->flags & FLAG_HLINKED); finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1); flist->in_progress--; continue; } #endif if (check_redo && (ndx = get_redo_num()) != -1) { csum_length = SUM_LENGTH; max_size = -max_size; min_size = -min_size; ignore_existing = -ignore_existing; ignore_non_existing = -ignore_non_existing; update_only = -update_only; always_checksum = -always_checksum; size_only = -size_only; append_mode = -append_mode; make_backups = -make_backups; /* avoid dup backup w/inplace */ ignore_times++; flist = cur_flist; cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2"); file = cur_flist->files[ndx - cur_flist->ndx_start]; if (solo_file) strlcpy(fbuf, solo_file, sizeof fbuf); else f_name(file, fbuf); recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out); cur_flist->to_redo--; cur_flist = flist; csum_length = SHORT_SUM_LENGTH; max_size = -max_size; min_size = -min_size; ignore_existing = -ignore_existing; ignore_non_existing = -ignore_non_existing; update_only = -update_only; always_checksum = -always_checksum; size_only = -size_only; append_mode = -append_mode; make_backups = -make_backups; ignore_times--; continue; } if (cur_flist == first_flist) break; /* We only get here if inc_recurse is enabled. */ if (first_flist->in_progress || first_flist->to_redo) break; if (!read_batch) { write_ndx(sock_f_out, NDX_DONE); maybe_flush_socket(1); } if (delete_during == 2 || !dir_tweaking) { /* Skip directory touch-up. */ } else if (first_flist->parent_ndx >= 0) touch_up_dirs(dir_flist, first_flist->parent_ndx); flist_free(first_flist); /* updates first_flist */ } } void generate_files(int f_out, const char *local_name) { int i, ndx, next_loopchk = 0; char fbuf[MAXPATHLEN]; int itemizing; enum logcode code; int save_info_flist = info_levels[INFO_FLIST]; int save_info_progress = info_levels[INFO_PROGRESS]; if (protocol_version >= 29) { itemizing = 1; maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT; code = logfile_format_has_i ? FNONE : FLOG; } else if (am_daemon) { itemizing = logfile_format_has_i && do_xfers; maybe_ATTRS_REPORT = ATTRS_REPORT; code = itemizing || !do_xfers ? FCLIENT : FINFO; } else if (!am_server) { itemizing = stdout_format_has_i; maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT; code = itemizing ? FNONE : FINFO; } else { itemizing = 0; maybe_ATTRS_REPORT = ATTRS_REPORT; code = FINFO; } solo_file = local_name; dir_tweaking = !(list_only || solo_file || dry_run); need_retouch_dir_times = preserve_times > 1; loopchk_limit = allowed_lull ? allowed_lull * 5 : 200; symlink_timeset_failed_flags = ITEM_REPORT_TIME | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0); implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30; if (DEBUG_GTE(GENR, 1)) rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid()); if (delete_before && !solo_file && cur_flist->used > 0) do_delete_pass(); if (delete_during == 2) { deldelay_size = BIGPATHBUFLEN * 4; deldelay_buf = new_array(char, deldelay_size); if (!deldelay_buf) out_of_memory("delete-delay"); } info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0; if (append_mode > 0 || whole_file < 0) whole_file = 0; if (DEBUG_GTE(FLIST, 1)) { rprintf(FINFO, "delta-transmission %s\n", whole_file ? "disabled for local transfer or --whole-file" : "enabled"); } /* Since we often fill up the outgoing socket and then just sit around * waiting for the other 2 processes to do their thing, we don't want * to exit on a timeout. If the data stops flowing, the receiver will * notice that and let us know via the redo pipe (or its closing). */ ignore_timeout = 1; dflt_perms = (ACCESSPERMS & ~orig_umask); do { #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && inc_recurse) { while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2) wait_for_receiver(); } #endif if (inc_recurse && cur_flist->parent_ndx >= 0) { struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx]; if (solo_file) strlcpy(fbuf, solo_file, sizeof fbuf); else f_name(fp, fbuf); ndx = cur_flist->ndx_start - 1; recv_generator(fbuf, fp, ndx, itemizing, code, f_out); if (delete_during && dry_run < 2 && !list_only && !(fp->flags & FLAG_MISSING_DIR)) { if (fp->flags & FLAG_CONTENT_DIR) { dev_t dirdev; if (one_file_system) { uint32 *devp = F_DIR_DEV_P(fp); dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)); } else dirdev = MAKEDEV(0, 0); /* We must be sure we've had a chance to receive an I/O * error for this directory before we delete in it. */ while (check_for_io_err && !cur_flist->next && !flist_eof) wait_for_receiver(); delete_in_dir(fbuf, fp, &dirdev); } else change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp)); } } for (i = cur_flist->low; i <= cur_flist->high; i++) { struct file_struct *file = cur_flist->sorted[i]; if (!F_IS_ACTIVE(file)) continue; if (unsort_ndx) ndx = F_NDX(file); else ndx = i + cur_flist->ndx_start; if (solo_file) strlcpy(fbuf, solo_file, sizeof fbuf); else f_name(file, fbuf); recv_generator(fbuf, file, ndx, itemizing, code, f_out); check_for_finished_files(itemizing, code, 0); if (i + cur_flist->ndx_start >= next_loopchk) { if (allowed_lull) maybe_send_keepalive(); else maybe_flush_socket(0); next_loopchk += loopchk_limit; } } if (!inc_recurse) { write_ndx(f_out, NDX_DONE); break; } while (1) { check_for_finished_files(itemizing, code, 1); if (cur_flist->next || flist_eof) break; wait_for_receiver(); } } while ((cur_flist = cur_flist->next) != NULL); if (delete_during) delete_in_dir(NULL, NULL, &dev_zero); phase++; if (DEBUG_GTE(GENR, 1)) rprintf(FINFO, "generate_files phase=%d\n", phase); while (1) { check_for_finished_files(itemizing, code, 1); if (msgdone_cnt) break; wait_for_receiver(); } phase++; if (DEBUG_GTE(GENR, 1)) rprintf(FINFO, "generate_files phase=%d\n", phase); write_ndx(f_out, NDX_DONE); /* Reduce round-trip lag-time for a useless delay-updates phase. */ if (protocol_version >= 29 && !delay_updates) write_ndx(f_out, NDX_DONE); /* Read MSG_DONE for the redo phase (and any prior messages). */ while (1) { check_for_finished_files(itemizing, code, 0); if (msgdone_cnt > 1) break; wait_for_receiver(); } if (protocol_version >= 29) { phase++; if (DEBUG_GTE(GENR, 1)) rprintf(FINFO, "generate_files phase=%d\n", phase); if (delay_updates) write_ndx(f_out, NDX_DONE); /* Read MSG_DONE for delay-updates phase & prior messages. */ while (msgdone_cnt == 2) wait_for_receiver(); } info_levels[INFO_FLIST] = save_info_flist; info_levels[INFO_PROGRESS] = save_info_progress; if (delete_during == 2) do_delayed_deletions(fbuf); if (delete_after && !solo_file && file_total > 0) do_delete_pass(); if ((need_retouch_dir_perms || need_retouch_dir_times) && dir_tweaking && (!inc_recurse || delete_during == 2)) touch_up_dirs(dir_flist, -1); if (max_delete >= 0 && deletion_count > max_delete) { rprintf(FWARNING, "Deletions stopped due to --max-delete limit (%d skipped)\n", deletion_count - max_delete); io_error |= IOERR_DEL_LIMIT; } if (DEBUG_GTE(GENR, 1)) rprintf(FINFO, "generate_files finished\n"); }