/*
* Routines only used by the receiving process.
*
* Copyright (C) 1996-2000 Andrew Tridgell
* Copyright (C) 1996 Paul Mackerras
* Copyright (C) 2003-2020 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, visit the http://fsf.org website.
*/
#include "rsync.h"
#include "inums.h"
extern int dry_run;
extern int do_xfers;
extern int use_db;
extern int db_lax;
extern int am_root;
extern int am_server;
extern int inc_recurse;
extern int log_before_transfer;
extern int stdout_format_has_i;
extern int logfile_format_has_i;
extern int want_xattr_optim;
extern int csum_length;
extern int read_batch;
extern int write_batch;
extern int batch_gen_fd;
extern int protocol_version;
extern int relative_paths;
extern int preserve_hard_links;
extern int preserve_perms;
extern int write_devices;
extern int preserve_xattrs;
extern int do_fsync;
extern int basis_dir_cnt;
extern int make_backups;
extern int cleanup_got_literal;
extern int remove_source_files;
extern int append_mode;
extern int sparse_files;
extern int preallocate_files;
extern int keep_partial;
extern int checksum_seed;
extern int checksum_files;
extern int whole_file;
extern int inplace;
extern int inplace_partial;
extern int allowed_lull;
extern int delay_updates;
extern int xfersum_type;
extern BOOL want_progress_now;
extern mode_t orig_umask;
extern struct stats stats;
extern char *tmpdir;
extern char *dest_filter;
extern char *partial_dir;
extern char *basis_dir[MAX_BASIS_DIRS+1];
extern char sender_file_sum[MAX_DIGEST_LEN];
extern struct file_list *cur_flist, *first_flist, *dir_flist;
extern filter_rule_list daemon_filter_list;
extern OFF_T preallocated_len;
static struct bitbag *delayed_bits = NULL;
static int phase = 0, redoing = 0;
static flist_ndx_list batch_redo_list;
/* This is non-0 when we are updating the basis file or an identical copy: */
static int updating_basis_or_equiv;
#define TMPNAME_SUFFIX ".XXXXXX"
#define TMPNAME_SUFFIX_LEN ((int)sizeof TMPNAME_SUFFIX - 1)
#define MAX_UNIQUE_NUMBER 999999
#define MAX_UNIQUE_LOOP 100
/* get_tmpname() - create a tmp filename for a given filename
*
* If a tmpdir is defined, use that as the directory to put it in. Otherwise,
* the tmp filename is in the same directory as the given name. Note that
* there may be no directory at all in the given name!
*
* The tmp filename is basically the given filename with a dot prepended, and
* .XXXXXX appended (for mkstemp() to put its unique gunk in). We take care
* to not exceed either the MAXPATHLEN or NAME_MAX, especially the last, as
* the basename basically becomes 8 characters longer. In such a case, the
* original name is shortened sufficiently to make it all fit.
*
* If the make_unique arg is True, the XXXXXX string is replaced with a unique
* string that doesn't exist at the time of the check. This is intended to be
* used for creating hard links, symlinks, devices, and special files, since
* normal files should be handled by mkstemp() for safety.
*
* Of course, the only reason the file is based on the original name is to
* make it easier to figure out what purpose a temp file is serving when a
* transfer is in progress. */
int get_tmpname(char *fnametmp, const char *fname, BOOL make_unique)
{
int maxname, length = 0;
const char *f;
char *suf;
if (tmpdir) {
/* Note: this can't overflow, so the return value is safe */
length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
fnametmp[length++] = '/';
}
if ((f = strrchr(fname, '/')) != NULL) {
++f;
if (!tmpdir) {
length = f - fname;
/* copy up to and including the slash */
strlcpy(fnametmp, fname, length + 1);
}
} else
f = fname;
if (!tmpdir) { /* using a tmpdir avoids the leading dot on our temp names */
if (*f == '.') /* avoid an extra leading dot for OS X's sake */
f++;
fnametmp[length++] = '.';
}
/* The maxname value is bufsize, and includes space for the '\0'.
* NAME_MAX needs an extra -1 for the name's leading dot. */
maxname = MIN(MAXPATHLEN - length - TMPNAME_SUFFIX_LEN,
NAME_MAX - 1 - TMPNAME_SUFFIX_LEN);
if (maxname < 0) {
rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname);
fnametmp[0] = '\0';
return 0;
}
if (maxname) {
int added = strlcpy(fnametmp + length, f, maxname);
if (added >= maxname)
added = maxname - 1;
suf = fnametmp + length + added;
/* Trim any dangling high-bit chars if the first-trimmed char (if any) is
* also a high-bit char, just in case we cut into a multi-byte sequence.
* We are guaranteed to stop because of the leading '.' we added. */
if ((int)f[added] & 0x80) {
while ((int)suf[-1] & 0x80)
suf--;
}
/* trim one trailing dot before our suffix's dot */
if (suf[-1] == '.')
suf--;
} else
suf = fnametmp + length - 1; /* overwrite the leading dot with suffix's dot */
if (make_unique) {
static unsigned counter_limit;
unsigned counter;
if (!counter_limit) {
counter_limit = (unsigned)getpid() + MAX_UNIQUE_LOOP;
if (counter_limit > MAX_UNIQUE_NUMBER || counter_limit < MAX_UNIQUE_LOOP)
counter_limit = MAX_UNIQUE_LOOP;
}
counter = counter_limit - MAX_UNIQUE_LOOP;
/* This doesn't have to be very good because we don't need
* to worry about someone trying to guess the values: all
* a conflict will do is cause a device, special file, hard
* link, or symlink to fail to be created. Also: avoid
* using mktemp() due to gcc's annoying warning. */
while (1) {
snprintf(suf, TMPNAME_SUFFIX_LEN+1, ".%d", counter);
if (access(fnametmp, 0) < 0)
break;
if (++counter >= counter_limit)
return 0;
}
} else
memcpy(suf, TMPNAME_SUFFIX, TMPNAME_SUFFIX_LEN+1);
return 1;
}
/* Opens a temporary file for writing.
* Success: Writes name into fnametmp, returns fd.
* Failure: Clobbers fnametmp, returns -1.
* Calling cleanup_set() is the caller's job. */
int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file)
{
int fd;
mode_t added_perms;
if (!get_tmpname(fnametmp, fname, False))
return -1;
if (am_root < 0) {
/* For --fake-super, the file must be useable by the copying
* user, just like it would be for root. */
added_perms = S_IRUSR|S_IWUSR;
} else {
/* For a normal copy, we need to be able to tweak things like xattrs. */
added_perms = S_IWUSR;
}
/* We initially set the perms without the setuid/setgid bits or group
* access to ensure that there is no race condition. They will be
* correctly updated after the right owner and group info is set.
* (Thanks to snabb@epipe.fi for pointing this out.) */
fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
#if 0
/* In most cases parent directories will already exist because their
* information should have been previously transferred, but that may
* not be the case with -R */
if (fd == -1 && relative_paths && errno == ENOENT
&& make_path(fnametmp, ACCESSPERMS, MKP_SKIP_SLASH | MKP_DROP_NAME) == 0) {
/* Get back to name with XXXXXX in it. */
get_tmpname(fnametmp, fname, False);
fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
}
#endif
if (fd == -1) {
rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
full_fname(fnametmp));
return -1;
}
return fd;
}
static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
const char *fname, int fd, struct file_struct *file, int inplace_sizing)
{
static char file_sum1[MAX_DIGEST_LEN];
struct map_struct *mapbuf;
struct sum_struct sum;
int sum_len;
int32 len;
OFF_T total_size = F_LENGTH(file);
OFF_T offset = 0;
OFF_T offset2;
char *data;
int32 i;
char *map = NULL;
#ifdef SUPPORT_PREALLOCATION
if (preallocate_files && fd != -1 && total_size > 0 && (!inplace_sizing || total_size > size_r)) {
/* Try to preallocate enough space for file's eventual length. Can
* reduce fragmentation on filesystems like ext4, xfs, and NTFS. */
if ((preallocated_len = do_fallocate(fd, 0, total_size)) < 0)
rsyserr(FWARNING, errno, "do_fallocate %s", full_fname(fname));
} else
#endif
if (inplace_sizing) {
#ifdef HAVE_FTRUNCATE
/* The most compatible way to create a sparse file is to start with no length. */
if (sparse_files > 0 && whole_file && fd >= 0 && do_ftruncate(fd, 0) == 0)
preallocated_len = 0;
else
#endif
preallocated_len = size_r;
} else
preallocated_len = 0;
read_sum_head(f_in, &sum);
if (fd_r >= 0 && size_r > 0) {
int32 read_size = MAX(sum.blength * 2, 16*1024);
mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
if (DEBUG_GTE(DELTASUM, 2)) {
rprintf(FINFO, "recv mapped %s of size %s\n",
fname_r, big_num(size_r));
}
} else
mapbuf = NULL;
sum_init(xfersum_type, checksum_seed);
if (append_mode > 0) {
OFF_T j;
sum.flength = (OFF_T)sum.count * sum.blength;
if (sum.remainder)
sum.flength -= sum.blength - sum.remainder;
if (append_mode == 2 && mapbuf) {
for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
if (INFO_GTE(PROGRESS, 1))
show_progress(offset, total_size);
sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
CHUNK_SIZE);
offset = j;
}
if (offset < sum.flength) {
int32 len = (int32)(sum.flength - offset);
if (INFO_GTE(PROGRESS, 1))
show_progress(offset, total_size);
sum_update(map_ptr(mapbuf, offset, len), len);
}
}
offset = sum.flength;
if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s",
full_fname(fname), big_num(j), big_num(offset));
exit_cleanup(RERR_FILEIO);
}
}
while ((i = recv_token(f_in, &data)) != 0) {
if (INFO_GTE(PROGRESS, 1))
show_progress(offset, total_size);
if (allowed_lull)
maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH | MSK_ACTIVE_RECEIVER);
if (i > 0) {
if (DEBUG_GTE(DELTASUM, 3)) {
rprintf(FINFO,"data recv %d at %s\n",
i, big_num(offset));
}
stats.literal_data += i;
cleanup_got_literal = 1;
sum_update(data, i);
if (fd != -1 && write_file(fd, 0, offset, data, i) != i)
goto report_write_error;
offset += i;
continue;
}
i = -(i+1);
offset2 = i * (OFF_T)sum.blength;
len = sum.blength;
if (i == (int)sum.count-1 && sum.remainder != 0)
len = sum.remainder;
stats.matched_data += len;
if (DEBUG_GTE(DELTASUM, 3)) {
rprintf(FINFO,
"chunk[%d] of size %ld at %s offset=%s%s\n",
i, (long)len, big_num(offset2), big_num(offset),
updating_basis_or_equiv && offset == offset2 ? " (seek)" : "");
}
if (mapbuf) {
map = map_ptr(mapbuf,offset2,len);
see_token(map, len);
sum_update(map, len);
}
if (updating_basis_or_equiv) {
if (offset == offset2 && fd != -1) {
if (skip_matched(fd, offset, map, len) < 0)
goto report_write_error;
offset += len;
continue;
}
}
if (fd != -1 && map && write_file(fd, 0, offset, map, len) != (int)len)
goto report_write_error;
offset += len;
}
if (fd != -1 && offset > 0) {
if (sparse_files > 0) {
if (sparse_end(fd, offset) != 0)
goto report_write_error;
} else if (flush_write_file(fd) < 0) {
report_write_error:
rsyserr(FERROR_XFER, errno, "write failed on %s", full_fname(fname));
exit_cleanup(RERR_FILEIO);
}
}
#ifdef HAVE_FTRUNCATE
/* inplace: New data could be shorter than old data.
* preallocate_files: total_size could have been an overestimate.
* Cut off any extra preallocated zeros from dest file. */
if ((inplace_sizing || preallocated_len > offset) && fd != -1 && !IS_DEVICE(file->mode)) {
if (do_ftruncate(fd, offset) < 0)
rsyserr(FERROR_XFER, errno, "ftruncate failed on %s", full_fname(fname));
}
#endif
if (INFO_GTE(PROGRESS, 1))
end_progress(total_size);
sum_len = sum_end(file_sum1);
if (do_fsync && fd != -1 && fsync(fd) != 0) {
rsyserr(FERROR, errno, "fsync failed on %s",
full_fname(fname));
exit_cleanup(RERR_FILEIO);
}
if (mapbuf)
unmap_file(mapbuf);
read_buf(f_in, sender_file_sum, sum_len);
if (DEBUG_GTE(DELTASUM, 2))
rprintf(FINFO,"got file_sum\n");
if (fd != -1 && memcmp(file_sum1, sender_file_sum, sum_len) != 0)
return 0;
return 1;
}
static void discard_receive_data(int f_in, struct file_struct *file)
{
receive_data(f_in, NULL, -1, 0, NULL, -1, file, 0);
}
static void handle_delayed_updates(char *local_name)
{
char *fname, *partialptr;
int ndx;
for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
struct file_struct *file = cur_flist->files[ndx];
fname = local_name ? local_name : f_name(file, NULL);
if ((partialptr = partial_dir_fname(fname)) != NULL) {
if (make_backups > 1 && !make_backup(fname, False))
continue;
if (DEBUG_GTE(RECV, 1)) {
rprintf(FINFO, "renaming %s to %s\n",
partialptr, fname);
}
/* We don't use robust_rename() here because the
* partial-dir must be on the same drive. */
if (do_rename(partialptr, fname) < 0) {
rsyserr(FERROR_XFER, errno,
"rename failed for %s (from %s)",
full_fname(fname), partialptr);
} else {
if (remove_source_files || checksum_files & CSF_UPDATE
|| (preserve_hard_links && F_IS_HLINKED(file)))
send_msg_int(MSG_SUCCESS, ndx);
handle_partial_dir(partialptr, PDIR_DELETE);
}
}
}
}
static void no_batched_update(int ndx, BOOL is_redo)
{
struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
struct file_struct *file = flist->files[ndx - flist->ndx_start];
rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
is_redo ? " resend of" : "", f_name(file, NULL));
if (inc_recurse && !dry_run)
send_msg_int(MSG_NO_SEND, ndx);
}
static int we_want_redo(int desired_ndx)
{
static int redo_ndx = -1;
while (redo_ndx < desired_ndx) {
if (redo_ndx >= 0)
no_batched_update(redo_ndx, True);
if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
return 0;
}
if (redo_ndx == desired_ndx) {
redo_ndx = -1;
return 1;
}
return 0;
}
static int gen_wants_ndx(int desired_ndx, int flist_num)
{
static int next_ndx = -1;
static int done_cnt = 0;
static BOOL got_eof = False;
if (got_eof)
return 0;
/* TODO: integrate gen-reading I/O into perform_io() so this is not needed? */
io_flush(FULL_FLUSH);
while (next_ndx < desired_ndx) {
if (inc_recurse && flist_num <= done_cnt)
return 0;
if (next_ndx >= 0)
no_batched_update(next_ndx, False);
if ((next_ndx = read_int(batch_gen_fd)) < 0) {
if (inc_recurse) {
done_cnt++;
continue;
}
got_eof = True;
return 0;
}
}
if (next_ndx == desired_ndx) {
next_ndx = -1;
return 1;
}
return 0;
}
/**
* main routine for receiver process.
*
* Receiver process runs on the same host as the generator process. */
int recv_files(int f_in, int f_out, char *local_name)
{
int fd1,fd2;
STRUCT_STAT st;
int iflags, xlen;
char *fname, fbuf[MAXPATHLEN];
char xname[MAXPATHLEN];
char *fnametmp, fnametmpbuf[MAXPATHLEN];
char *fnamecmp, *partialptr;
char fnamecmpbuf[MAXPATHLEN];
char *filter_argv[MAX_FILTER_ARGS + 1];
uchar fnamecmp_type;
struct file_struct *file;
int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
enum logcode log_code = log_before_transfer ? FLOG : FINFO;
int max_phase = protocol_version >= 29 ? 2 : 1;
int dflt_perms = (ACCESSPERMS & ~orig_umask);
#ifdef SUPPORT_ACLS
const char *parent_dirname = "";
#endif
int ndx, recv_ok, one_inplace;
pid_t pid = 0;
if (DEBUG_GTE(RECV, 1))
rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
if (delay_updates)
delayed_bits = bitbag_create(cur_flist->used + 1);
if (use_db && (append_mode == 1 || protocol_version < 30))
use_db = 0; /* We can't note finished md5 values */
if (dest_filter) {
char *p;
char *sep = " \t";
int i;
for (p = strtok(dest_filter, sep), i = 0;
p && i < MAX_FILTER_ARGS;
p = strtok(0, sep))
filter_argv[i++] = p;
filter_argv[i] = NULL;
if (p) {
rprintf(FERROR,
"Too many arguments to dest-filter (> %d)\n",
MAX_FILTER_ARGS);
exit_cleanup(RERR_SYNTAX);
}
}
progress_init();
while (1) {
cleanup_disable();
/* This call also sets cur_flist. */
ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
xname, &xlen);
if (ndx == NDX_DONE) {
if (!am_server && cur_flist) {
set_current_file_index(NULL, 0);
if (INFO_GTE(PROGRESS, 2))
end_progress(0);
}
if (inc_recurse && first_flist) {
if (read_batch) {
ndx = first_flist->used + first_flist->ndx_start;
gen_wants_ndx(ndx, first_flist->flist_num);
}
flist_free(first_flist);
if (first_flist)
continue;
} else if (read_batch && first_flist) {
ndx = first_flist->used;
gen_wants_ndx(ndx, first_flist->flist_num);
}
if (++phase > max_phase)
break;
if (DEBUG_GTE(RECV, 1))
rprintf(FINFO, "recv_files phase=%d\n", phase);
if (phase == 2 && delay_updates)
handle_delayed_updates(local_name);
write_int(f_out, NDX_DONE);
continue;
}
if (ndx - cur_flist->ndx_start >= 0)
file = cur_flist->files[ndx - cur_flist->ndx_start];
else
file = dir_flist->files[cur_flist->parent_ndx];
fname = local_name ? local_name : f_name(file, fbuf);
if (DEBUG_GTE(RECV, 1))
rprintf(FINFO, "recv_files(%s)\n", fname);
if (daemon_filter_list.head && (*fname != '.' || fname[1] != '\0')
&& check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
rprintf(FERROR, "attempt to hack rsync failed.\n");
exit_cleanup(RERR_PROTOCOL);
}
#ifdef SUPPORT_XATTRS
if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
&& !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
recv_xattr_request(file, f_in);
#endif
if (!(iflags & ITEM_TRANSFER)) {
maybe_log_item(file, iflags, itemizing, xname);
#ifdef SUPPORT_XATTRS
if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
&& !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
set_file_attrs(fname, file, NULL, fname, 0);
#endif
if (iflags & ITEM_IS_NEW) {
stats.created_files++;
if (S_ISREG(file->mode)) {
/* Nothing further to count. */
} else if (S_ISDIR(file->mode))
stats.created_dirs++;
#ifdef SUPPORT_LINKS
else if (S_ISLNK(file->mode))
stats.created_symlinks++;
#endif
else if (IS_DEVICE(file->mode))
stats.created_devices++;
else
stats.created_specials++;
}
continue;
}
if (phase == 2) {
rprintf(FERROR,
"got transfer request in phase 2 [%s]\n",
who_am_i());
exit_cleanup(RERR_PROTOCOL);
}
if (file->flags & FLAG_FILE_SENT) {
if (csum_length == SHORT_SUM_LENGTH) {
if (keep_partial && !partial_dir)
make_backups = -make_backups; /* prevents double backup */
if (append_mode)
sparse_files = -sparse_files;
append_mode = -append_mode;
csum_length = SUM_LENGTH;
redoing = 1;
}
} else {
if (csum_length != SHORT_SUM_LENGTH) {
if (keep_partial && !partial_dir)
make_backups = -make_backups;
if (append_mode)
sparse_files = -sparse_files;
append_mode = -append_mode;
csum_length = SHORT_SUM_LENGTH;
redoing = 0;
}
if (iflags & ITEM_IS_NEW)
stats.created_files++;
}
if (!am_server)
set_current_file_index(file, ndx);
stats.xferred_files++;
stats.total_transferred_size += F_LENGTH(file);
cleanup_got_literal = 0;
if (read_batch) {
int wanted = redoing
? we_want_redo(ndx)
: gen_wants_ndx(ndx, cur_flist->flist_num);
if (!wanted) {
rprintf(FINFO,
"(Skipping batched update for%s \"%s\")\n",
redoing ? " resend of" : "",
fname);
discard_receive_data(f_in, file);
file->flags |= FLAG_FILE_SENT;
continue;
}
}
remember_initial_stats();
if (!do_xfers) { /* log the transfer */
log_item(FCLIENT, file, iflags, NULL);
if (read_batch)
discard_receive_data(f_in, file);
continue;
}
if (write_batch < 0) {
log_item(FCLIENT, file, iflags, NULL);
if (!am_server)
discard_receive_data(f_in, file);
if (inc_recurse)
send_msg_int(MSG_SUCCESS, ndx);
continue;
}
partialptr = partial_dir ? partial_dir_fname(fname) : fname;
if (protocol_version >= 29) {
switch (fnamecmp_type) {
case FNAMECMP_FNAME:
fnamecmp = fname;
break;
case FNAMECMP_PARTIAL_DIR:
fnamecmp = partialptr;
break;
case FNAMECMP_BACKUP:
fnamecmp = get_backup_name(fname);
break;
case FNAMECMP_FUZZY:
if (file->dirname) {
pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, file->dirname, xname);
fnamecmp = fnamecmpbuf;
} else
fnamecmp = xname;
break;
default:
if (fnamecmp_type > FNAMECMP_FUZZY && fnamecmp_type-FNAMECMP_FUZZY <= basis_dir_cnt) {
fnamecmp_type -= FNAMECMP_FUZZY + 1;
if (file->dirname) {
stringjoin(fnamecmpbuf, sizeof fnamecmpbuf,
basis_dir[fnamecmp_type], "/", file->dirname, "/", xname, NULL);
} else
pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], xname);
} else if (fnamecmp_type >= basis_dir_cnt) {
rprintf(FERROR,
"invalid basis_dir index: %d.\n",
fnamecmp_type);
exit_cleanup(RERR_PROTOCOL);
} else
pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], fname);
fnamecmp = fnamecmpbuf;
break;
}
if (!fnamecmp || (daemon_filter_list.head
&& check_filter(&daemon_filter_list, FLOG, fnamecmp, 0) < 0)) {
fnamecmp = fname;
fnamecmp_type = FNAMECMP_FNAME;
}
} else {
/* Reminder: --inplace && --partial-dir are never
* enabled at the same time. */
if (inplace && make_backups > 1) {
if (!(fnamecmp = get_backup_name(fname)))
fnamecmp = fname;
else
fnamecmp_type = FNAMECMP_BACKUP;
} else if (partial_dir && partialptr)
fnamecmp = partialptr;
else
fnamecmp = fname;
}
/* open the file */
fd1 = do_open(fnamecmp, O_RDONLY, 0);
if (fd1 == -1 && protocol_version < 29) {
if (fnamecmp != fname) {
fnamecmp = fname;
fnamecmp_type = FNAMECMP_FNAME;
fd1 = do_open(fnamecmp, O_RDONLY, 0);
}
if (fd1 == -1 && basis_dir[0]) {
/* pre-29 allowed only one alternate basis */
pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
basis_dir[0], fname);
fnamecmp = fnamecmpbuf;
fnamecmp_type = FNAMECMP_BASIS_DIR_LOW;
fd1 = do_open(fnamecmp, O_RDONLY, 0);
}
}
one_inplace = inplace_partial && fnamecmp_type == FNAMECMP_PARTIAL_DIR;
updating_basis_or_equiv = one_inplace
|| (inplace && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP));
if (fd1 == -1) {
st.st_mode = 0;
st.st_size = 0;
} else if (do_fstat(fd1,&st) != 0) {
rsyserr(FERROR_XFER, errno, "fstat %s failed",
full_fname(fnamecmp));
discard_receive_data(f_in, file);
close(fd1);
if (inc_recurse)
send_msg_int(MSG_NO_SEND, ndx);
continue;
}
if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
/* this special handling for directories
* wouldn't be necessary if robust_rename()
* and the underlying robust_unlink could cope
* with directories
*/
rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
full_fname(fnamecmp));
discard_receive_data(f_in, file);
close(fd1);
if (inc_recurse)
send_msg_int(MSG_NO_SEND, ndx);
continue;
}
if (fd1 != -1 && !(S_ISREG(st.st_mode) || (write_devices && IS_DEVICE(st.st_mode)))) {
close(fd1);
fd1 = -1;
}
if (fd1 != -1 && IS_DEVICE(st.st_mode) && st.st_size == 0)
st.st_size = get_device_size(fd1, fname);
/* If we're not preserving permissions, change the file-list's
* mode based on the local permissions and some heuristics. */
if (!preserve_perms) {
int exists = fd1 != -1;
#ifdef SUPPORT_ACLS
const char *dn = file->dirname ? file->dirname : ".";
if (parent_dirname != dn
&& strcmp(parent_dirname, dn) != 0) {
dflt_perms = default_perms_for_dir(dn);
parent_dirname = dn;
}
#endif
file->mode = dest_mode(file->mode, st.st_mode, dflt_perms, exists);
}
/* We now check to see if we are writing the file "inplace" */
if (inplace || one_inplace) {
fnametmp = one_inplace ? partialptr : fname;
fd2 = do_open(fnametmp, O_WRONLY|O_CREAT, 0600);
if (fd2 == -1) {
rsyserr(FERROR_XFER, errno, "open %s failed",
full_fname(fnametmp));
} else if (updating_basis_or_equiv)
cleanup_set(NULL, NULL, file, fd1, fd2);
} else {
fnametmp = fnametmpbuf;
fd2 = open_tmpfile(fnametmp, fname, file);
if (fd2 != -1)
cleanup_set(fnametmp, partialptr, file, fd1, fd2);
}
if (fd2 == -1) {
discard_receive_data(f_in, file);
if (fd1 != -1)
close(fd1);
if (inc_recurse)
send_msg_int(MSG_NO_SEND, ndx);
continue;
}
/* log the transfer */
if (log_before_transfer)
log_item(FCLIENT, file, iflags, NULL);
else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
rprintf(FINFO, "%s\n", fname);
if (dest_filter)
pid = run_filter(filter_argv, fd2, &fd2);
/* recv file data */
recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size, fname, fd2, file, inplace || one_inplace);
log_item(log_code, file, iflags, NULL);
if (want_progress_now)
instant_progress(fname);
if (fd1 != -1)
close(fd1);
if (close(fd2) < 0) {
rsyserr(FERROR, errno, "close failed on %s",
full_fname(fnametmp));
exit_cleanup(RERR_FILEIO);
}
if (dest_filter) {
int status;
wait_process_with_flush(pid, &status);
if (status != 0) {
rprintf(FERROR, "filter %s exited code: %d\n",
dest_filter, status);
continue;
}
}
if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
if (partialptr == fname)
partialptr = NULL;
if (!finish_transfer(fname, fnametmp, fnamecmp, partialptr, file, recv_ok, 1))
recv_ok = -1;
else if (fnamecmp == partialptr) {
if (!one_inplace)
do_unlink(partialptr);
handle_partial_dir(partialptr, PDIR_DELETE);
}
if (use_db && do_lstat(fname, &st) == 0)
db_set_checksum(5, &st, sender_file_sum);
} else if (keep_partial && partialptr && !one_inplace) {
if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
rprintf(FERROR,
"Unable to create partial-dir for %s -- discarding %s.\n",
local_name ? local_name : f_name(file, NULL),
recv_ok ? "completed file" : "partial file");
do_unlink(fnametmp);
recv_ok = -1;
} else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
file, recv_ok, !partial_dir))
recv_ok = -1;
else if (delay_updates && recv_ok) {
bitbag_set_bit(delayed_bits, ndx);
if (use_db && do_lstat(partialptr, &st) == 0)
db_set_checksum(5, &st, sender_file_sum);
recv_ok = 2;
} else
partialptr = NULL;
} else if (!one_inplace)
do_unlink(fnametmp);
cleanup_disable();
if (read_batch)
file->flags |= FLAG_FILE_SENT;
switch (recv_ok) {
case 2:
break;
case 1:
if (remove_source_files || inc_recurse || checksum_files & CSF_UPDATE
|| (preserve_hard_links && F_IS_HLINKED(file)))
send_msg_int(MSG_SUCCESS, ndx);
break;
case 0: {
enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1)) {
char *errstr, *redostr, *keptstr;
if (!(keep_partial && partialptr) && !inplace)
keptstr = "discarded";
else if (partial_dir)
keptstr = "put into partial-dir";
else
keptstr = "retained";
if (msgtype == FERROR_XFER) {
errstr = "ERROR";
redostr = "";
} else {
errstr = "WARNING";
redostr = read_batch ? " (may try again)"
: " (will try again)";
}
rprintf(msgtype,
"%s: %s failed verification -- update %s%s.\n",
errstr, local_name ? f_name(file, NULL) : fname,
keptstr, redostr);
}
if (!redoing) {
if (read_batch)
flist_ndx_push(&batch_redo_list, ndx);
send_msg_int(MSG_REDO, ndx);
file->flags |= FLAG_FILE_SENT;
} else if (inc_recurse)
send_msg_int(MSG_NO_SEND, ndx);
break;
}
case -1:
if (inc_recurse)
send_msg_int(MSG_NO_SEND, ndx);
break;
}
}
if (make_backups < 0)
make_backups = -make_backups;
if (phase == 2 && delay_updates) /* for protocol_version < 29 */
handle_delayed_updates(local_name);
if (DEBUG_GTE(RECV, 1))
rprintf(FINFO,"recv_files finished\n");
return 0;
}
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