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-rw-r--r--generator.c2434
1 files changed, 2434 insertions, 0 deletions
diff --git a/generator.c b/generator.c
new file mode 100644
index 0000000..21c4a59
--- /dev/null
+++ b/generator.c
@@ -0,0 +1,2434 @@
+/*
+ * Routines that are exclusive to the generator process.
+ *
+ * Copyright (C) 1996-2000 Andrew Tridgell
+ * Copyright (C) 1996 Paul Mackerras
+ * Copyright (C) 2002 Martin Pool <mbp@samba.org>
+ * 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"
+#include "ifuncs.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 write_devices;
+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_mtimes;
+extern int omit_dir_times;
+extern int omit_link_times;
+extern int delete_mode;
+extern int delete_before;
+extern int delete_during;
+extern int delete_after;
+extern int missing_args;
+extern int msgdone_cnt;
+extern int ignore_errors;
+extern int remove_source_files;
+extern int delay_updates;
+extern int update_only;
+extern int human_readable;
+extern int ignore_existing;
+extern int ignore_non_existing;
+extern int want_xattr_optim;
+extern int modify_window;
+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 protocol_version;
+extern int file_total;
+extern int fuzzy_basis;
+extern int always_checksum;
+extern int flist_csum_len;
+extern char *partial_dir;
+extern int alt_dest_type;
+extern int whole_file;
+extern int list_only;
+extern int read_batch;
+extern int write_batch;
+extern int safe_symlinks;
+extern int32 block_size;
+extern int unsort_ndx;
+extern int max_delete;
+extern int force_delete;
+extern int one_file_system;
+extern int skipped_deletes;
+extern dev_t filesystem_dev;
+extern mode_t orig_umask;
+extern uid_t our_uid;
+extern char *tmpdir;
+extern char *basis_dir[MAX_BASIS_DIRS+1];
+extern struct file_list *cur_flist, *first_flist, *dir_flist;
+extern filter_rule_list filter_list, daemon_filter_list;
+
+int maybe_ATTRS_REPORT = 0;
+int maybe_ATTRS_ACCURATE_TIME = 0;
+
+static dev_t dev_zero;
+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;
+
+/* Forward declarations. */
+#ifdef SUPPORT_HARD_LINKS
+static void handle_skipped_hlink(struct file_struct *file, int itemizing,
+ enum logcode code, int f_out);
+#endif
+
+#define EARLY_DELAY_DONE_MSG() (!delay_updates)
+#define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
+
+static int start_delete_delay_temp(void)
+{
+ char fnametmp[MAXPATHLEN];
+ int save_dry_run = dry_run;
+
+ dry_run = 0;
+ if (!get_tmpname(fnametmp, "deldelay", False)
+ || (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;
+ unsigned int mode;
+ int j, len;
+ 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;
+ static struct hashtable *dev_tbl;
+ struct file_list *dirlist;
+ char delbuf[MAXPATHLEN];
+ int dlen, i;
+
+ 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(time(NULL), MSK_ALLOW_FLUSH);
+
+ if (io_error & IOERR_GENERAL && !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 (!dev_tbl)
+ dev_tbl = hashtable_create(16, HT_KEY64);
+ if (file->flags & FLAG_TOP_DIR) {
+ hashtable_find(dev_tbl, fs_dev+1, "");
+ filesystem_dev = fs_dev;
+ } else if (filesystem_dev != fs_dev) {
+ if (!hashtable_find(dev_tbl, fs_dev+1, NULL))
+ return;
+ filesystem_dev = fs_dev; /* it's a prior top-dir dev */
+ }
+ }
+
+ 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;
+ }
+ /* Here we want to match regardless of file type. Replacement
+ * of a file with one of another type is handled separately by
+ * a delete_item call with a DEL_MAKE_ROOM flag. */
+ if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
+ int flags = DEL_RECURSE;
+ if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
+ 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);
+}
+
+/* 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];
+
+ if (!F_IS_ACTIVE(file))
+ continue;
+
+ 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");
+}
+
+static inline int mtime_differs(STRUCT_STAT *stp, struct file_struct *file)
+{
+#ifdef ST_MTIME_NSEC
+ return !same_time(stp->st_mtime, stp->ST_MTIME_NSEC, file->modtime, F_MOD_NSEC_or_0(file));
+#else
+ return !same_time(stp->st_mtime, 0, file->modtime, 0);
+#endif
+}
+
+static inline int any_time_differs(stat_x *sxp, struct file_struct *file, UNUSED(const char *fname))
+{
+ int differs = mtime_differs(&sxp->st, file);
+#ifdef SUPPORT_CRTIMES
+ if (!differs && crtimes_ndx) {
+ if (sxp->crtime == 0)
+ sxp->crtime = get_create_time(fname, &sxp->st);
+ differs = !same_time(sxp->crtime, 0, F_CRTIME(file), 0);
+ }
+#endif
+ return differs;
+}
+
+static inline int perms_differ(struct file_struct *file, stat_x *sxp)
+{
+ if (preserve_perms)
+ return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
+
+ if (preserve_executability)
+ return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
+
+ return 0;
+}
+
+static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
+{
+ if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
+ return 1;
+
+ if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
+ return 1;
+
+ return 0;
+}
+
+#ifdef SUPPORT_ACLS
+static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
+{
+ if (preserve_acls) {
+ if (!ACL_READY(*sxp))
+ get_acl(fname, sxp);
+ if (set_acl(NULL, file, sxp, file->mode))
+ return 1;
+ }
+
+ return 0;
+}
+#endif
+
+#ifdef SUPPORT_XATTRS
+static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
+{
+ if (preserve_xattrs) {
+ if (!XATTR_READY(*sxp))
+ get_xattr(fname, sxp);
+ if (xattr_diff(file, sxp, 0))
+ return 1;
+ }
+
+ return 0;
+}
+#endif
+
+int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
+{
+ if (S_ISLNK(file->mode)) {
+#ifdef CAN_SET_SYMLINK_TIMES
+ if (preserve_mtimes && !omit_link_times && any_time_differs(sxp, file, fname))
+ return 0;
+#endif
+#ifdef CAN_CHMOD_SYMLINK
+ if (perms_differ(file, sxp))
+ return 0;
+#endif
+#ifdef CAN_CHOWN_SYMLINK
+ if (ownership_differs(file, sxp))
+ return 0;
+#endif
+#if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
+ if (acls_differ(fname, file, sxp))
+ return 0;
+#endif
+#if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
+ if (xattrs_differ(fname, file, sxp))
+ return 0;
+#endif
+ } else {
+ if (preserve_mtimes && any_time_differs(sxp, file, fname))
+ return 0;
+ if (perms_differ(file, sxp))
+ return 0;
+ if (ownership_differs(file, sxp))
+ return 0;
+#ifdef SUPPORT_ACLS
+ if (acls_differ(fname, file, sxp))
+ return 0;
+#endif
+#ifdef SUPPORT_XATTRS
+ if (xattrs_differ(fname, file, sxp))
+ 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_mtimes ? 0
+ : S_ISDIR(file->mode) ? !omit_dir_times
+ : S_ISLNK(file->mode) ? !omit_link_times
+ : 1;
+
+ 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
+ ? mtime_differs(&sxp->st, file)
+ : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
+ && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
+ iflags |= ITEM_REPORT_TIME;
+ if (atimes_ndx && !S_ISDIR(file->mode) && !S_ISLNK(file->mode)
+ && !same_time(F_ATIME(file), 0, sxp->st.st_atime, 0))
+ iflags |= ITEM_REPORT_ATIME;
+#ifdef SUPPORT_CRTIMES
+ if (crtimes_ndx) {
+ if (sxp->crtime == 0)
+ sxp->crtime = get_create_time(fnamecmp, &sxp->st);
+ if (!same_time(sxp->crtime, 0, F_CRTIME(file), 0))
+ iflags |= ITEM_REPORT_CRTIME;
+ }
+#endif
+#ifndef CAN_CHMOD_SYMLINK
+ 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, file->mode))
+ 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 && do_xfers
+ && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
+ int fd = iflags & ITEM_REPORT_XATTR
+ && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
+ ? sock_f_out : -1;
+ send_xattr_request(NULL, file, fd);
+ }
+#endif
+ } else if (ndx >= 0) {
+ enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
+ log_item(code, file, iflags, xname);
+ }
+ }
+}
+
+static enum filetype get_file_type(mode_t mode)
+{
+ if (S_ISREG(mode))
+ return FT_REG;
+ if (S_ISLNK(mode))
+ return FT_SYMLINK;
+ if (S_ISDIR(mode))
+ return FT_DIR;
+ if (IS_SPECIAL(mode))
+ return FT_SPECIAL;
+ if (IS_DEVICE(mode))
+ return FT_DEVICE;
+ return FT_UNSUPPORTED;
+}
+
+/* Perform our quick-check heuristic for determining if a file is unchanged. */
+int quick_check_ok(enum filetype ftype, const char *fn, struct file_struct *file, STRUCT_STAT *st)
+{
+ switch (ftype) {
+ case FT_REG:
+ if (st->st_size != F_LENGTH(file))
+ return 0;
+
+ /* If always_checksum is set then we use the checksum instead
+ * of the file mtime to determine whether to sync. */
+ if (always_checksum > 0) {
+ char sum[MAX_DIGEST_LEN];
+ file_checksum(fn, st, sum);
+ return memcmp(sum, F_SUM(file), flist_csum_len) == 0;
+ }
+
+ if (size_only > 0)
+ return 1;
+
+ if (ignore_times)
+ return 0;
+
+ if (mtime_differs(st, file))
+ return 0;
+ break;
+ case FT_DIR:
+ break;
+ case FT_SYMLINK: {
+#ifdef SUPPORT_LINKS
+ char lnk[MAXPATHLEN];
+ int len = do_readlink(fn, lnk, MAXPATHLEN-1);
+ if (len <= 0)
+ return 0;
+ lnk[len] = '\0';
+ if (strcmp(lnk, F_SYMLINK(file)) != 0)
+ return 0;
+ break;
+#else
+ return -1;
+#endif
+ }
+ case FT_SPECIAL:
+ if (!BITS_EQUAL(file->mode, st->st_mode, _S_IFMT))
+ return 0;
+ break;
+ case FT_DEVICE: {
+ uint32 *devp = F_RDEV_P(file);
+ if (st->st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
+ return 0;
+ break;
+ }
+ case FT_UNSUPPORTED:
+ return -1;
+ }
+ return 1;
+}
+
+/*
+ * 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 (len < 0) {
+ /* The file length overflowed our int64 var, so we can't process this file. */
+ sum->count = -1; /* indicate overflow error */
+ return;
+ }
+
+ 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), (long)sum->remainder, (long)sum->blength,
+ sum->s2length, big_num(sum->flength));
+ }
+}
+
+
+/*
+ * 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), big_num(offset - n1), (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 struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
+{
+ 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 i, j;
+ struct file_struct *lowest_fp = NULL;
+
+ fname_len = strlen(fname);
+ fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
+
+ /* Try to find an exact size+mtime match first. */
+ for (i = 0; i < fuzzy_basis; i++) {
+ struct file_list *dirlist = dirlist_array[i];
+
+ if (!dirlist)
+ continue;
+
+ for (j = 0; j < dirlist->used; j++) {
+ struct file_struct *fp = dirlist->files[j];
+
+ if (!F_IS_ACTIVE(fp))
+ continue;
+
+ if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
+ continue;
+
+ if (F_LENGTH(fp) == F_LENGTH(file) && same_time(fp->modtime, 0, file->modtime, 0)) {
+ if (DEBUG_GTE(FUZZY, 2))
+ rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
+ *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
+ return fp;
+ }
+
+ }
+ }
+
+ for (i = 0; i < fuzzy_basis; i++) {
+ struct file_list *dirlist = dirlist_array[i];
+
+ if (!dirlist)
+ continue;
+
+ 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 (!F_IS_ACTIVE(fp))
+ continue;
+
+ if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
+ continue;
+
+ name = fp->basename;
+ len = strlen(name);
+ suf = find_filename_suffix(name, len, &suf_len);
+
+ dist = fuzzy_distance(name, len, fname, fname_len, lowest_dist);
+ /* Add some extra weight to how well the suffixes match unless we've already disqualified
+ * this file based on a heuristic. */
+ if (dist < 0xFFFF0000U) {
+ dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len, 0xFFFF0000U) * 10;
+ }
+ if (DEBUG_GTE(FUZZY, 2)) {
+ rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
+ f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
+ }
+ if (dist <= lowest_dist) {
+ lowest_dist = dist;
+ lowest_fp = fp;
+ *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
+ }
+ }
+ }
+
+ return lowest_fp;
+}
+
+/* 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) {
+ 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. If we're called with the
+ * find_exact_for_existing flag, the destination file already exists, so
+ * we only try to find an exact alt-dest match. In this case, the returns
+ * are only -2 & -1 (both as above). */
+static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
+ char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
+ int itemizing, enum logcode code)
+{
+ STRUCT_STAT real_st = sxp->st;
+ 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;
+ if (match_level == 0) {
+ best_match = j;
+ match_level = 1;
+ }
+ if (!quick_check_ok(FT_REG, cmpbuf, file, &sxp->st))
+ continue;
+ if (match_level == 1) {
+ best_match = j;
+ match_level = 2;
+ }
+ if (unchanged_attrs(cmpbuf, file, sxp)) {
+ best_match = j;
+ match_level = 3;
+ break;
+ }
+ free_stat_x(sxp);
+ } while (basis_dir[++j] != NULL);
+
+ if (!match_level)
+ goto got_nothing_for_ya;
+
+ if (j != best_match) {
+ j = best_match;
+ pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
+ if (link_stat(cmpbuf, &sxp->st, 0) < 0)
+ goto got_nothing_for_ya;
+ }
+
+ if (match_level == 3 && alt_dest_type != COPY_DEST) {
+ if (find_exact_for_existing) {
+ if (alt_dest_type == LINK_DEST && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
+ return -1;
+ if (do_unlink(fname) < 0 && errno != ENOENT)
+ goto got_nothing_for_ya;
+ }
+#ifdef SUPPORT_HARD_LINKS
+ if (alt_dest_type == LINK_DEST) {
+ if (!hard_link_one(file, fname, cmpbuf, 1))
+ goto try_a_copy;
+ if (atimes_ndx)
+ set_file_attrs(fname, file, sxp, NULL, 0);
+ 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 (find_exact_for_existing)
+ goto got_nothing_for_ya;
+
+ 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) {
+ if (find_exact_for_existing) /* Can get here via hard-link failure */
+ goto got_nothing_for_ya;
+ 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;
+
+got_nothing_for_ya:
+ sxp->st = real_st;
+ return -1;
+}
+
+/* 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)
+{
+ int best_match = -1;
+ int match_level = 0;
+ enum filetype ftype = get_file_type(file->mode);
+ int j = 0;
+
+#ifndef SUPPORT_LINKS
+ if (ftype == FT_SYMLINK)
+ return -1;
+#endif
+ if (ftype == FT_REG || ftype == FT_UNSUPPORTED) {
+ 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;
+ if (ftype != get_file_type(sxp->st.st_mode))
+ continue;
+ if (match_level < 1) {
+ match_level = 1;
+ best_match = j;
+ }
+ if (!quick_check_ok(ftype, cmpbuf, file, &sxp->st))
+ continue;
+ 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 (alt_dest_type == 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 = alt_dest_type == COMPARE_DEST && ftype != FT_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, ftype == FT_DIR ? "/" : "");
+ }
+ return -2;
+ }
+
+ return j;
+}
+
+static void list_file_entry(struct file_struct *f)
+{
+ char permbuf[PERMSTRING_SIZE];
+ const char *mtime_str = timestring(f->modtime);
+ int size_width = human_readable ? 14 : 11;
+ int mtime_width = 1 + strlen(mtime_str);
+ int atime_width = atimes_ndx ? mtime_width : 0;
+ int crtime_width = crtimes_ndx ? mtime_width : 0;
+
+ if (!F_IS_ACTIVE(f)) {
+ /* this can happen if duplicate names were removed */
+ return;
+ }
+
+ /* TODO: indicate '+' if the entry has an ACL. */
+
+ if (missing_args == 2 && f->mode == 0) {
+ rprintf(FINFO, "%-*s %s\n",
+ 10 + 1 + size_width + mtime_width + atime_width + crtime_width, "*missing",
+ f_name(f, NULL));
+ } else {
+ const char *atime_str = atimes_ndx && !S_ISDIR(f->mode) ? timestring(F_ATIME(f)) : "";
+ const char *crtime_str = crtimes_ndx ? timestring(F_CRTIME(f)) : "";
+ const char *arrow, *lnk;
+
+ permstring(permbuf, f->mode);
+
+#ifdef SUPPORT_LINKS
+ if (preserve_links && S_ISLNK(f->mode)) {
+ arrow = " -> ";
+ lnk = F_SYMLINK(f);
+ } else
+#endif
+ arrow = lnk = "";
+
+ rprintf(FINFO, "%s %*s %s%*s%*s %s%s%s\n",
+ permbuf, size_width, human_num(F_LENGTH(f)),
+ timestring(f->modtime), atime_width, atime_str, crtime_width, crtime_str,
+ f_name(f, NULL), arrow, lnk);
+ }
+}
+
+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 = "";
+ static struct file_struct *prior_dir_file = NULL;
+ /* 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[MAX_BASIS_DIRS+1];
+ 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;
+ enum filetype stype, ftype = get_file_type(file->mode);
+ int is_dir = ftype != FT_DIR ? 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;
+ }
+
+ maybe_ATTRS_ACCURATE_TIME = always_checksum ? ATTRS_ACCURATE_TIME : 0;
+
+ 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;
+ }
+
+ init_stat_x(&sx);
+ 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,
+ "ERROR: daemon refused to receive %s \"%s\"\n",
+ is_dir ? "directory" : "file", fname);
+ if (is_dir)
+ goto skipping_dir_contents;
+ return;
+ }
+ }
+
+ if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
+ int i;
+ parent_is_dry_missing:
+ for (i = 0; i < fuzzy_basis; i++) {
+ if (fuzzy_dirlist[i]) {
+ flist_free(fuzzy_dirlist[i]);
+ fuzzy_dirlist[i] = 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) {
+ /* Each parent dir must be in the file list or the flist data is bad.
+ * Optimization: most of the time the parent dir will be the last dir
+ * this function was asked to process in the file list. */
+ if (!inc_recurse
+ && (*dn != '.' || dn[1]) /* Avoid an issue with --relative and the "." dir. */
+ && (!prior_dir_file || strcmp(dn, f_name(prior_dir_file, NULL)) != 0)) {
+ int ok = 0, j = flist_find_name(cur_flist, dn, -1);
+ if (j >= 0) {
+ struct file_struct *f = cur_flist->sorted[j];
+ if (S_ISDIR(f->mode) || (missing_args == 2 && !file->mode && !f->mode))
+ ok = 1;
+ }
+ /* The --delete-missing-args option can actually put invalid entries into
+ * the file list, so if that option was specified, we'll just complain about
+ * it and allow it. */
+ if (!ok && missing_args == 2 && file->mode == 0 && j < 0)
+ rprintf(FERROR, "WARNING: parent dir is absent in the file list: %s\n", dn);
+ else if (!ok) {
+ rprintf(FERROR, "ABORTING due to invalid path from sender: %s/%s\n",
+ dn, file->basename);
+ exit_cleanup(RERR_PROTOCOL);
+ }
+ }
+ if (relative_paths && !implied_dirs && file->mode != 0
+ && do_stat(dn, &sx.st) < 0) {
+ if (dry_run)
+ goto parent_is_dry_missing;
+ if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
+ rsyserr(FERROR_XFER, errno,
+ "recv_generator: mkdir %s failed",
+ full_fname(dn));
+ }
+ }
+ if (fuzzy_basis) {
+ int i;
+ for (i = 0; i < fuzzy_basis; i++) {
+ if (fuzzy_dirlist[i]) {
+ flist_free(fuzzy_dirlist[i]);
+ fuzzy_dirlist[i] = NULL;
+ }
+ }
+ need_fuzzy_dirlist = 1;
+ }
+#ifdef SUPPORT_ACLS
+ if (!preserve_perms)
+ dflt_perms = default_perms_for_dir(dn);
+#endif
+ }
+ parent_dirname = dn;
+
+ statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
+ stat_errno = errno;
+ }
+
+ if (missing_args == 2 && file->mode == 0) {
+ if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
+ return;
+ if (statret == 0)
+ delete_item(fname, sx.st.st_mode, del_opts);
+ return;
+ }
+
+ 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 (statret == 0)
+ stype = get_file_type(sx.st.st_mode);
+ else
+ stype = FT_UNSUPPORTED;
+
+ if (ignore_existing > 0 && statret == 0
+ && (!is_dir || stype != FT_DIR)) {
+ if (INFO_GTE(SKIP, 1) && is_dir >= 0) {
+ const char *suf = "";
+ if (INFO_GTE(SKIP, 2)) {
+ if (ftype != stype)
+ suf = " (type change)";
+ else if (!quick_check_ok(ftype, fname, file, &sx.st))
+ suf = always_checksum ? " (sum change)" : " (file change)";
+ else if (!unchanged_attrs(fname, file, &sx))
+ suf = " (attr change)";
+ else
+ suf = " (uptodate)";
+ }
+ rprintf(FINFO, "%s exists%s\n", fname, suf);
+ }
+#ifdef SUPPORT_HARD_LINKS
+ if (F_IS_HLINKED(file))
+ handle_skipped_hlink(file, itemizing, code, f_out);
+#endif
+ goto cleanup;
+ }
+
+ fnamecmp = fname;
+
+ if (is_dir) {
+ mode_t added_perms;
+ if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
+ goto cleanup;
+ if (am_root < 0) {
+ /* For --fake-super, the dir must be useable by the copying
+ * user, just like it would be for root. */
+ added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
+ } else
+ added_perms = 0;
+ if (is_dir < 0) {
+ if (!preserve_mtimes || omit_dir_times)
+ goto cleanup;
+ /* 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
+ && (stype == FT_DIR
+ || 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|added_perms) & 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 && stype != FT_DIR) {
+ 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;
+ }
+ init_stat_x(&real_sx);
+ real_sx.st = sx.st;
+ real_ret = statret;
+ 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;
+ fnamecmp = fnamecmpbuf;
+ }
+ }
+ if (itemizing && f_out != -1) {
+ itemize(fnamecmp, file, ndx, statret, &sx,
+ statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
+ }
+ if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
+ if (!relative_paths || errno != ENOENT
+ || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
+ || (do_mkdir(fname, file->mode|added_perms) < 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 both
+ * readable and writable permissions during the time we are
+ * putting files within them. This is then restored to the
+ * former permissions after the transfer is done. */
+#ifdef HAVE_CHMOD
+ if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
+ mode_t mode = file->mode | S_IRWXU;
+ 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));
+ }
+ prior_dir_file = 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 && stype != FT_DIR;
+ 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 && ftype == FT_SYMLINK) {
+#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 contains the destination path, but we
+ * want to report the source path. */
+ fname = f_name(file, NULL);
+ }
+ rprintf(FINFO,
+ "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
+ fname, sl);
+ }
+ goto cleanup;
+ }
+ if (statret == 0) {
+ if (stype == FT_SYMLINK && quick_check_ok(stype, fname, file, &sx.st)) {
+ /* 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);
+#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;
+ }
+ } 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 (alt_dest_type == LINK_DEST) {
+ /* Resort to --copy-dest behavior. */
+ } else
+#endif
+ if (alt_dest_type != COPY_DEST)
+ goto cleanup;
+ itemizing = 0;
+ code = FNONE;
+ } else if (j >= 0) {
+ statret = 1;
+ fnamecmp = fnamecmpbuf;
+ }
+ }
+ if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
+ set_file_attrs(fname, file, NULL, NULL, 0);
+ if (itemizing) {
+ if (statret == 0 && stype != FT_SYMLINK)
+ statret = -1;
+ itemize(fnamecmp, 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 && ftype == FT_DEVICE)
+ || (preserve_specials && ftype == FT_SPECIAL)) {
+ dev_t rdev;
+ int del_for_flag;
+ if (ftype == FT_DEVICE) {
+ uint32 *devp = F_RDEV_P(file);
+ rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
+ del_for_flag = DEL_FOR_DEVICE;
+ } else {
+ rdev = 0;
+ del_for_flag = DEL_FOR_SPECIAL;
+ }
+ if (statret == 0) {
+ if (ftype != stype)
+ statret = -1;
+ else if (quick_check_ok(ftype, fname, file, &sx.st)) {
+ /* 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;
+ }
+ } 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 (alt_dest_type == LINK_DEST) {
+ /* Resort to --copy-dest behavior. */
+ } else
+#endif
+ if (alt_dest_type != COPY_DEST)
+ goto cleanup;
+ itemizing = 0;
+ code = FNONE;
+ } else if (j >= 0) {
+ statret = 1;
+ fnamecmp = fnamecmpbuf;
+ }
+ }
+ 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 (atomic_create(file, fname, NULL, NULL, rdev, &sx, del_for_flag)) {
+ set_file_attrs(fname, file, NULL, NULL, 0);
+ if (itemizing) {
+ itemize(fnamecmp, 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 (ftype != FT_REG) {
+ if (INFO_GTE(NONREG, 1)) {
+ 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 && file->modtime - sx.st.st_mtime < modify_window) {
+ 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_type = FNAMECMP_FNAME;
+
+ if (statret == 0 && !(stype == FT_REG || (write_devices && stype == FT_DEVICE))) {
+ if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
+ goto cleanup;
+ statret = -1;
+ stat_errno = ENOENT;
+ }
+
+ if (basis_dir[0] != NULL && (statret != 0 || alt_dest_type != COPY_DEST)) {
+ int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx, statret == 0, 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;
+ }
+ }
+
+ init_stat_x(&real_sx);
+ real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
+ real_ret = statret;
+
+ 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_basis) {
+ if (need_fuzzy_dirlist) {
+ const char *dn = file->dirname ? file->dirname : ".";
+ int i;
+ strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
+ for (i = 0; i < fuzzy_basis; i++) {
+ if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
+ continue;
+ fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES | GDL_PERHAPS_DIR);
+ if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
+ flist_free(fuzzy_dirlist[i]);
+ fuzzy_dirlist[i] = NULL;
+ }
+ }
+ need_fuzzy_dirlist = 0;
+ }
+
+ /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
+ fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
+ if (fuzzy_file) {
+ 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;
+ }
+ }
+
+ 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 (write_devices && IS_DEVICE(sx.st.st_mode) && sx.st.st_size == 0) {
+ /* This early open into fd skips the regular open below. */
+ if ((fd = do_open(fnamecmp, O_RDONLY, 0)) >= 0)
+ real_sx.st.st_size = sx.st.st_size = get_device_size(fd, fnamecmp);
+ }
+
+ if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
+ ;
+ else if (fnamecmp_type >= FNAMECMP_FUZZY)
+ ;
+ else if (quick_check_ok(FT_REG, 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 | maybe_ATTRS_ACCURATE_TIME);
+ 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_success(fname, 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) < 0) {
+ unmake_file(back_file);
+ back_file = NULL;
+ goto cleanup;
+ }
+ }
+ goto notify_others;
+ }
+
+ if (fuzzy_dirlist[0]) {
+ int j = flist_find(fuzzy_dirlist[0], file);
+ if (j >= 0) /* don't use changing file as future fuzzy basis */
+ fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
+ }
+
+ /* open the file */
+ if (fd < 0 && (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))) {
+ goto cleanup;
+ }
+ if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
+ 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;
+ goto cleanup;
+ }
+ if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
+ rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
+ unmake_file(back_file);
+ back_file = NULL;
+ 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));
+ }
+
+ 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 || write_batch < 0))
+ 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);
+ free_stat_x(&real_sx);
+ }
+
+ 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);
+ } 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);
+ }
+ }
+
+ cleanup:
+ if (fd >= 0)
+ close(fd);
+ 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);
+ }
+
+ free_stat_x(&sx);
+}
+
+/* If we are replacing an existing hard link, symlink, device, or special file,
+ * create a temp-name item and rename it into place. A symlimk specifies slnk,
+ * a hard link specifies hlnk, otherwise we create a device based on rdev.
+ * Specify 0 for the del_for_flag if there is not a file to replace. This
+ * returns 1 on success and 0 on failure. */
+int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
+ dev_t rdev, stat_x *sxp, int del_for_flag)
+{
+ char tmpname[MAXPATHLEN];
+ const char *create_name;
+ int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
+
+ if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
+ skip_atomic = 1;
+ else
+ skip_atomic = 0;
+
+ if (del_for_flag) {
+ if (make_backups > 0 && !dir_in_the_way) {
+ if (!make_backup(fname, skip_atomic))
+ return 0;
+ } else if (skip_atomic) {
+ int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
+ if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
+ return 0;
+ }
+ }
+
+ create_name = skip_atomic ? fname : tmpname;
+
+ if (slnk) {
+#ifdef SUPPORT_LINKS
+ if (do_symlink(slnk, create_name) < 0) {
+ rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
+ full_fname(create_name), slnk);
+ return 0;
+ }
+#else
+ return 0;
+#endif
+ } else if (hlnk) {
+#ifdef SUPPORT_HARD_LINKS
+ if (!hard_link_one(file, create_name, hlnk, 0))
+ return 0;
+#else
+ return 0;
+#endif
+ } else {
+ if (do_mknod(create_name, file->mode, rdev) < 0) {
+ rsyserr(FERROR_XFER, errno, "mknod %s failed",
+ full_fname(create_name));
+ return 0;
+ }
+ }
+
+ if (!skip_atomic) {
+ if (do_rename(tmpname, fname) < 0) {
+ rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
+ full_fname(tmpname), full_fname(fname));
+ do_unlink(tmpname);
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+#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;
+ BOOL fix_dir_perms;
+ 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 (!F_IS_ACTIVE(file))
+ continue;
+ 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);
+ }
+ /* Be sure not to retouch permissions with --fake-super. */
+ fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
+ if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
+ continue;
+ fname = f_name(file, NULL);
+ if (fix_dir_perms)
+ do_chmod(fname, file->mode);
+ if (need_retouch_dir_times) {
+ STRUCT_STAT st;
+ if (link_stat(fname, &st, 0) == 0 && mtime_differs(&st, file)) {
+ st.st_mtime = file->modtime;
+#ifdef ST_MTIME_NSEC
+ st.ST_MTIME_NSEC = F_MOD_NSEC_or_0(file);
+#endif
+ set_times(fname, &st);
+ }
+ }
+ if (counter >= loopchk_limit) {
+ if (allowed_lull)
+ maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
+ 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) {
+ int send_failed = (ndx == -2);
+ if (send_failed)
+ ndx = get_hlink_num();
+ flist = flist_for_ndx(ndx, "check_for_finished_files.1");
+ file = flist->files[ndx - flist->ndx_start];
+ assert(file->flags & FLAG_HLINKED);
+ if (send_failed)
+ handle_skipped_hlink(file, itemizing, code, sock_f_out);
+ else
+ 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) {
+ OFF_T save_max_size = max_size;
+ OFF_T save_min_size = min_size;
+ csum_length = SUM_LENGTH;
+ max_size = -1;
+ min_size = -1;
+ 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 = save_max_size;
+ min_size = save_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;
+
+ write_ndx(sock_f_out, NDX_DONE);
+ if (!read_batch && !flist_eof) {
+ int old_total = 0;
+ for (flist = first_flist; flist != cur_flist; flist = flist->next)
+ old_total += flist->used;
+ maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
+ }
+
+ 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_mtimes && !omit_dir_times;
+ 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=%d\n", (int)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);
+ }
+ 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");
+ }
+
+ dflt_perms = (ACCESSPERMS & ~orig_umask);
+
+ do {
+#ifdef SUPPORT_HARD_LINKS
+ if (preserve_hard_links && inc_recurse) {
+ while (!flist_eof && file_total < MIN_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);
+ 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(time(NULL), MSK_ALLOW_FLUSH);
+ 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 && EARLY_DELAY_DONE_MSG())
+ write_ndx(f_out, NDX_DONE);
+
+ if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
+ if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
+ write_del_stats(f_out);
+ if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
+ 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 (!EARLY_DELAY_DONE_MSG()) {
+ write_ndx(f_out, NDX_DONE);
+ if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
+ 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 (max_delete >= 0 && skipped_deletes) {
+ rprintf(FWARNING,
+ "Deletions stopped due to --max-delete limit (%d skipped)\n",
+ skipped_deletes);
+ io_error |= IOERR_DEL_LIMIT;
+ }
+
+ if (protocol_version >= 31) {
+ if (!EARLY_DELETE_DONE_MSG()) {
+ if (INFO_GTE(STATS, 2) || read_batch)
+ write_del_stats(f_out);
+ write_ndx(f_out, NDX_DONE);
+ }
+
+ /* Read MSG_DONE for late-delete phase & prior messages. */
+ while (msgdone_cnt == 3)
+ wait_for_receiver();
+ }
+
+ if ((need_retouch_dir_perms || need_retouch_dir_times)
+ && dir_tweaking && (!inc_recurse || delete_during == 2))
+ touch_up_dirs(dir_flist, -1);
+
+ if (DEBUG_GTE(GENR, 1))
+ rprintf(FINFO, "generate_files finished\n");
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-17 04:28:52 +0000