/* 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;
if (!get_tmpname(fnametmp, fname))
return -1;
/* 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 [email protected] for pointing this out.) */
fd = do_mkstemp(fnametmp, file->mode & 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
&& create_directory_path(fnametmp) == 0) {
/* Get back to name with XXXXXX in it. */
get_tmpname(fnametmp, fname);
fd = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
}
#endif
if (fd == -1) {
rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
full_fname(fnametmp));
return -1;
}
return fd;
}
atf_error_t
atf_fs_mkstemp(atf_fs_path_t *p, int *fdout)
{
atf_error_t err;
char *buf;
int fd;
if (!check_umask(S_IRWXU, S_IRWXU)) {
err = invalid_umask_error(p, atf_fs_stat_reg_type, current_umask());
goto out;
}
err = copy_contents(p, &buf);
if (atf_is_error(err))
goto out;
err = do_mkstemp(buf, &fd);
if (atf_is_error(err))
goto out_buf;
replace_contents(p, buf);
*fdout = fd;
INV(!atf_is_error(err));
out_buf:
free(buf);
out:
return err;
}
/* 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))
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 [email protected] for pointing this out.) */
fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS, (char*)fname);
#if 0 /* was SUPPORT_ACLS */
/* 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
&& create_directory_path(fnametmp) == 0) {
/* Get back to name with XXXXXX in it. */
get_tmpname(fnametmp, fname);
fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS, fname);
}
#endif
if (fd == -1) {
rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
full_fname(fnametmp));
return -1;
}
return fd;
}
/**
* main routine for receiver process.
*
* Receiver process runs on the same host as the generator process. */
int recv_files(int f_in, struct file_list *flist, char *local_name)
{
int next_gen_i = -1;
int fd1,fd2;
STRUCT_STAT st;
int iflags, xlen;
char *fname, fbuf[MAXPATHLEN];
char xname[MAXPATHLEN];
char fnametmp[MAXPATHLEN];
char *fnamecmp, *partialptr, numbuf[4];
char fnamecmpbuf[MAXPATHLEN];
uchar fnamecmp_type;
struct file_struct *file;
struct stats initial_stats;
int save_make_backups = make_backups;
int itemizing = am_daemon ? daemon_log_format_has_i
: !am_server && log_format_has_i;
int max_phase = protocol_version >= 29 ? 2 : 1;
int i, recv_ok;
if (verbose > 2)
rprintf(FINFO,"recv_files(%d) starting\n",flist->count);
if (flist->hlink_pool) {
pool_destroy(flist->hlink_pool);
flist->hlink_pool = NULL;
}
if (delay_updates)
init_delayed_bits(flist->count);
while (1) {
cleanup_disable();
i = read_int(f_in);
if (i == -1) {
if (read_batch) {
get_next_gen_i(batch_gen_fd, next_gen_i,
flist->count);
next_gen_i = -1;
}
if (++phase > max_phase)
break;
csum_length = SUM_LENGTH;
if (verbose > 2)
rprintf(FINFO, "recv_files phase=%d\n", phase);
if (phase == 2 && delay_updates)
handle_delayed_updates(flist, local_name);
send_msg(MSG_DONE, "", 0);
if (keep_partial && !partial_dir)
make_backups = 0; /* prevents double backup */
continue;
}
iflags = read_item_attrs(f_in, -1, i, &fnamecmp_type,
xname, &xlen);
if (iflags == ITEM_IS_NEW) /* no-op packet */
continue;
file = flist->files[i];
fname = local_name ? local_name : f_name_to(file, fbuf);
if (verbose > 2)
rprintf(FINFO, "recv_files(%s)\n", safe_fname(fname));
if (!(iflags & ITEM_TRANSFER)) {
maybe_log_item(file, iflags, itemizing, xname);
continue;
}
if (phase == 2) {
rprintf(FERROR,
"got transfer request in phase 2 [%s]\n",
who_am_i());
exit_cleanup(RERR_PROTOCOL);
}
stats.current_file_index = i;
stats.num_transferred_files++;
stats.total_transferred_size += file->length;
cleanup_got_literal = 0;
if (server_filter_list.head
&& check_filter(&server_filter_list, fname, 0) < 0) {
rprintf(FERROR, "attempt to hack rsync failed.\n");
exit_cleanup(RERR_PROTOCOL);
}
if (!do_xfers) { /* log the transfer */
if (!am_server && log_format)
log_item(file, &stats, iflags, NULL);
if (read_batch)
discard_receive_data(f_in, file->length);
continue;
}
if (write_batch < 0) {
log_item(file, &stats, iflags, NULL);
if (!am_server)
discard_receive_data(f_in, file->length);
continue;
}
if (read_batch) {
next_gen_i = get_next_gen_i(batch_gen_fd, next_gen_i, i);
if (i < next_gen_i) {
rprintf(FINFO, "(Skipping batched update for \"%s\")\n",
safe_fname(fname));
discard_receive_data(f_in, file->length);
continue;
}
next_gen_i = -1;
}
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, MAXPATHLEN,
file->dirname, xname);
fnamecmp = fnamecmpbuf;
} else
fnamecmp = xname;
break;
default:
if (fnamecmp_type >= basis_dir_cnt) {
rprintf(FERROR,
"invalid basis_dir index: %d.\n",
fnamecmp_type);
exit_cleanup(RERR_PROTOCOL);
}
pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
basis_dir[fnamecmp_type], fname);
fnamecmp = fnamecmpbuf;
break;
}
if (!fnamecmp || (server_filter_list.head
&& check_filter(&server_filter_list, fname, 0) < 0))
fnamecmp = fname;
} else {
/* Reminder: --inplace && --partial-dir are never
* enabled at the same time. */
if (inplace && make_backups) {
if (!(fnamecmp = get_backup_name(fname)))
fnamecmp = fname;
} else if (partial_dir && partialptr)
fnamecmp = partialptr;
else
fnamecmp = fname;
}
initial_stats = stats;
/* open the file */
fd1 = do_open(fnamecmp, O_RDONLY, 0);
if (fd1 == -1 && protocol_version < 29) {
if (fnamecmp != fname) {
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;
fd1 = do_open(fnamecmp, O_RDONLY, 0);
}
}
if (fd1 != -1 && do_fstat(fd1,&st) != 0) {
rsyserr(FERROR, errno, "fstat %s failed",
full_fname(fnamecmp));
discard_receive_data(f_in, file->length);
close(fd1);
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,"recv_files: %s is a directory\n",
full_fname(fnamecmp));
discard_receive_data(f_in, file->length);
close(fd1);
continue;
}
if (fd1 != -1 && !S_ISREG(st.st_mode)) {
close(fd1);
fd1 = -1;
}
if (fd1 != -1 && !preserve_perms) {
/* if the file exists already and we aren't preserving
* permissions then act as though the remote end sent
* us the file permissions we already have */
file->mode = st.st_mode;
}
/* We now check to see if we are writing file "inplace" */
if (inplace) {
fd2 = do_open(fname, O_WRONLY|O_CREAT, 0);
if (fd2 == -1) {
rsyserr(FERROR, errno, "open %s failed",
full_fname(fname));
discard_receive_data(f_in, file->length);
if (fd1 != -1)
close(fd1);
continue;
}
} else {
if (!get_tmpname(fnametmp,fname)) {
discard_receive_data(f_in, file->length);
if (fd1 != -1)
close(fd1);
continue;
}
/* we initially set the perms without the
* setuid/setgid bits to ensure that there is no race
* condition. They are then correctly updated after
* the lchown. Thanks to [email protected] for pointing
* this out. We also set it initially without group
* access because of a similar race condition. */
fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
/* 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 (fd2 == -1 && relative_paths && errno == ENOENT
&& create_directory_path(fnametmp, orig_umask) == 0) {
/* Get back to name with XXXXXX in it. */
get_tmpname(fnametmp, fname);
fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
}
if (fd2 == -1) {
rsyserr(FERROR, errno, "mkstemp %s failed",
full_fname(fnametmp));
discard_receive_data(f_in, file->length);
if (fd1 != -1)
close(fd1);
continue;
}
if (partialptr)
cleanup_set(fnametmp, partialptr, file, fd1, fd2);
}
/* log the transfer */
if (log_before_transfer)
log_item(file, &initial_stats, iflags, NULL);
else if (!am_server && verbose && do_progress)
rprintf(FINFO, "%s\n", safe_fname(fname));
/* recv file data */
recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
fname, fd2, file->length);
if (!log_before_transfer)
log_item(file, &initial_stats, iflags, NULL);
if (fd1 != -1)
close(fd1);
if (close(fd2) < 0) {
rsyserr(FERROR, errno, "close failed on %s",
full_fname(fnametmp));
exit_cleanup(RERR_FILEIO);
}
if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
finish_transfer(fname, fnametmp, file, recv_ok, 1);
if (partialptr != fname && fnamecmp == partialptr) {
do_unlink(partialptr);
handle_partial_dir(partialptr, PDIR_DELETE);
}
} else if (keep_partial && partialptr
&& handle_partial_dir(partialptr, PDIR_CREATE)) {
finish_transfer(partialptr, fnametmp, file, recv_ok,
!partial_dir);
if (delay_updates && recv_ok) {
set_delayed_bit(i);
recv_ok = -1;
}
} else {
partialptr = NULL;
do_unlink(fnametmp);
}
cleanup_disable();
if (recv_ok > 0) {
if (remove_sent_files
|| (preserve_hard_links && file->link_u.links)) {
SIVAL(numbuf, 0, i);
send_msg(MSG_SUCCESS, numbuf, 4);
}
} else if (!recv_ok) {
int msgtype = phase || read_batch ? FERROR : FINFO;
if (msgtype == FERROR || verbose) {
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) {
errstr = "ERROR";
redostr = "";
} else {
errstr = "WARNING";
redostr = " (will try again)";
}
rprintf(msgtype,
"%s: %s failed verification -- update %s%s.\n",
errstr, safe_fname(fname),
keptstr, redostr);
}
if (!phase) {
SIVAL(numbuf, 0, i);
send_msg(MSG_REDO, numbuf, 4);
}
}
}
make_backups = save_make_backups;
if (phase == 2 && delay_updates) /* for protocol_version < 29 */
handle_delayed_updates(flist, local_name);
if (verbose > 2)
rprintf(FINFO,"recv_files finished\n");
return 0;
}
