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generator.c
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generator.c
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/*
* 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) 2003-2023 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[MAX_DIGEST_LEN];
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,