[rsync/rsync.git] / receiver.c

/* -*- c-file-style: "linux" -*-

   Copyright (C) 1996-2000 by Andrew Tridgell
   Copyright (C) Paul Mackerras 1996

   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 2 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, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "rsync.h"

extern int verbose;
extern int recurse;
extern int delete_mode;
extern int delete_after;
extern int max_delete;
extern int csum_length;
extern struct stats stats;
extern int dry_run;
extern int read_batch;
extern int batch_gen_fd;
extern int am_server;
extern int relative_paths;
extern int keep_dirlinks;
extern int preserve_hard_links;
extern int preserve_perms;
extern int cvs_exclude;
extern int io_error;
extern char *tmpdir;
extern char *compare_dest;
extern int make_backups;
extern int do_progress;
extern char *backup_dir;
extern char *backup_suffix;
extern int backup_suffix_len;
extern int cleanup_got_literal;
extern int module_id;
extern int ignore_errors;
extern int orig_umask;
extern int keep_partial;
extern int checksum_seed;
extern int inplace;

extern struct exclude_list_struct server_exclude_list;


static void delete_one(char *fn, int is_dir)
{
	if (!is_dir) {
		if (robust_unlink(fn) != 0) {
			rsyserr(FERROR, errno, "delete_one: unlink %s failed",
				full_fname(fn));
		} else if (verbose)
			rprintf(FINFO, "deleting %s\n", fn);
	} else {
		if (do_rmdir(fn) != 0) {
			if (errno == ENOTDIR && keep_dirlinks) {
				delete_one(fn, 0);
				return;
			}
			if (errno != ENOTEMPTY && errno != EEXIST) {
				rsyserr(FERROR, errno,
					"delete_one: rmdir %s failed",
					full_fname(fn));
			}
		} else if (verbose)
			rprintf(FINFO, "deleting directory %s\n", fn);
	}
}


static int is_backup_file(char *fn)
{
	int k = strlen(fn) - backup_suffix_len;
	return k > 0 && strcmp(fn+k, backup_suffix) == 0;
}


/* This deletes any files on the receiving side that are not present
 * on the sending side. */
void delete_files(struct file_list *flist)
{
	struct file_list *local_file_list;
	int i, j;
	char *argv[1], fbuf[MAXPATHLEN];
	static int deletion_count;

	if (cvs_exclude)
		add_cvs_excludes();

	if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
		rprintf(FINFO,"IO error encountered - skipping file deletion\n");
		return;
	}

	for (j = 0; j < flist->count; j++) {
		if (!(flist->files[j]->flags & FLAG_TOP_DIR)
		    || !S_ISDIR(flist->files[j]->mode))
			continue;

		argv[0] = f_name_to(flist->files[j], fbuf);

		if (!(local_file_list = send_file_list(-1, 1, argv)))
			continue;

		if (verbose > 1)
			rprintf(FINFO, "deleting in %s\n", fbuf);

		for (i = local_file_list->count-1; i >= 0; i--) {
			if (max_delete && deletion_count > max_delete)
				break;
			if (!local_file_list->files[i]->basename)
				continue;
			if (flist_find(flist,local_file_list->files[i]) < 0) {
				char *f = f_name(local_file_list->files[i]);
				if (make_backups && (backup_dir || !is_backup_file(f))) {
					make_backup(f);
					if (verbose)
						rprintf(FINFO, "deleting %s\n", f);
				} else {
					int mode = local_file_list->files[i]->mode;
					delete_one(f, S_ISDIR(mode) != 0);
				}
				deletion_count++;
			}
		}
		flist_free(local_file_list);
	}
}


/*
 * 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).  Take care to not exceed
 *   either the MAXPATHLEN or NAME_MAX, esp. the last, as
 *   the basename basically becomes 8 chars longer. In that
 *   case, the original name is shortened sufficiently to
 *   make it all fit.
 *
 *   Of course, there's no real reason for the tmp name to
 *   look like the original, except to satisfy us humans.
 *   As long as it's unique, rsync will work.
 */

static int get_tmpname(char *fnametmp, char *fname)
{
	char *f;
	int     length = 0;
	int	maxname;

	if (tmpdir) {
		/* Note: this can't overflow, so the return value is safe */
		length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
		fnametmp[length++] = '/';
		fnametmp[length] = '\0';	/* always NULL terminated */
	}

	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;
	fnametmp[length++] = '.';
	fnametmp[length] = '\0';		/* always NULL terminated */

	maxname = MIN(MAXPATHLEN - 7 - length, NAME_MAX - 8);

	if (maxname < 1) {
		rprintf(FERROR, "temporary filename too long: %s\n", fname);
		fnametmp[0] = '\0';
		return 0;
	}

	strlcpy(fnametmp + length, f, maxname);
	strcat(fnametmp + length, ".XXXXXX");

	return 1;
}


static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
			char *fname, int fd, OFF_T total_size)
{
	static char file_sum1[MD4_SUM_LENGTH];
	static char file_sum2[MD4_SUM_LENGTH];
	struct map_struct *mapbuf;
	struct sum_struct sum;
	unsigned int len;
	OFF_T offset = 0;
	OFF_T offset2;
	char *data;
	int i;
	char *map = NULL;

	read_sum_head(f_in, &sum);

	if (fd_r >= 0 && size_r > 0) {
		mapbuf = map_file(fd_r, size_r, sum.blength);
		if (verbose > 2) {
			rprintf(FINFO, "recv mapped %s of size %.0f\n",
				fname_r, (double)size_r);
		}
	} else
		mapbuf = NULL;

	sum_init(checksum_seed);

	while ((i = recv_token(f_in, &data)) != 0) {
		if (do_progress)
			show_progress(offset, total_size);

		if (i > 0) {
			if (verbose > 3) {
				rprintf(FINFO,"data recv %d at %.0f\n",
					i,(double)offset);
			}

			stats.literal_data += i;
			cleanup_got_literal = 1;

			sum_update(data,i);

			if (fd != -1 && write_file(fd,data,i) != i) {
				rsyserr(FERROR, errno, "write failed on %s",
					full_fname(fname));
				exit_cleanup(RERR_FILEIO);
			}
			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 (verbose > 3)
			rprintf(FINFO,"chunk[%d] of size %d at %.0f offset=%.0f\n",
				i,len,(double)offset2,(double)offset);

		if (mapbuf) {
			map = map_ptr(mapbuf,offset2,len);

			see_token(map, len);
			sum_update(map,len);
		}

		if (!inplace || offset != offset2) {
			if (fd != -1 && write_file(fd, map, len) != (int)len) {
				rsyserr(FERROR, errno, "write failed on %s",
					full_fname(fname));
				exit_cleanup(RERR_FILEIO);
			}
		} else {
			flush_write_file(fd);
			if (do_lseek(fd,(OFF_T)len,SEEK_CUR) != offset+len) {
				rprintf(FERROR, "lseek failed on %s: %s, %lli, %lli, %i\n",
					full_fname(fname), strerror(errno),
					do_lseek(fd, 0, SEEK_CUR),
					offset + len, i);
				exit_cleanup(RERR_FILEIO);
			}
		}
		offset += len;
	}

	flush_write_file(fd);

#ifdef HAVE_FTRUNCATE
	if (inplace)
		ftruncate(fd, offset);
#endif

	if (do_progress)
		end_progress(total_size);

	if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
		rsyserr(FERROR, errno, "write failed on %s",
			full_fname(fname));
		exit_cleanup(RERR_FILEIO);
	}

	sum_end(file_sum1);

	if (mapbuf)
		unmap_file(mapbuf);

	read_buf(f_in,file_sum2,MD4_SUM_LENGTH);
	if (verbose > 2)
		rprintf(FINFO,"got file_sum\n");
	if (fd != -1 && memcmp(file_sum1, file_sum2, MD4_SUM_LENGTH) != 0)
		return 0;
	return 1;
}


static void discard_receive_data(int f_in, OFF_T length)
{
	receive_data(f_in, NULL, -1, 0, NULL, -1, length);
}


/**
 * 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;
	char *fname, fbuf[MAXPATHLEN];
	char template[MAXPATHLEN];
	char fnametmp[MAXPATHLEN];
	char *fnamecmp;
	char fnamecmpbuf[MAXPATHLEN];
	struct file_struct *file;
	struct stats initial_stats;
	int save_make_backups = make_backups;
	int i, recv_ok, phase = 0;

	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;
	}

	while (1) {
		cleanup_disable();

		i = read_int(f_in);
		if (i == -1) {
			if (read_batch) {
				if (next_gen_i != flist->count)
					while (read_int(batch_gen_fd) != -1) {}
				next_gen_i = -1;
			}

			if (phase)
				break;

			phase = 1;
			csum_length = SUM_LENGTH;
			if (verbose > 2)
				rprintf(FINFO, "recv_files phase=%d\n", phase);
			send_msg(MSG_DONE, "", 0);
			if (keep_partial)
				make_backups = 0; /* prevents double backup */
			continue;
		}

		if (i < 0 || i >= flist->count) {
			rprintf(FERROR,"Invalid file index %d in recv_files (count=%d)\n",
				i, flist->count);
			exit_cleanup(RERR_PROTOCOL);
		}

		file = flist->files[i];

		stats.current_file_index = i;
		stats.num_transferred_files++;
		stats.total_transferred_size += file->length;
		cleanup_got_literal = 0;

		if (local_name)
			fname = local_name;
		else
			fname = f_name_to(file, fbuf);

		if (dry_run) {
			if (!am_server && verbose)
				rprintf(FINFO, "%s\n", fname);
			continue;
		}

		initial_stats = stats;

		if (verbose > 2)
			rprintf(FINFO,"recv_files(%s)\n",fname);

		fnamecmp = fname;

		if (read_batch) {
			while (i > next_gen_i) {
				next_gen_i = read_int(batch_gen_fd);
				if (next_gen_i == -1)
					next_gen_i = flist->count;
			}
			if (i < next_gen_i) {
				rprintf(FINFO, "skipping update for \"%s\"\n",
					fname);
				discard_receive_data(f_in, file->length);
				continue;
			}
		}

		if (server_exclude_list.head
		    && check_exclude(&server_exclude_list, fname,
				     S_ISDIR(file->mode)) < 0) {
			if (verbose) {
				rprintf(FINFO,
					"skipping server-excluded update for \"%s\"\n",
					fname);
			}
			discard_receive_data(f_in, file->length);
			continue;
		}

		/* open the file */
		fd1 = do_open(fnamecmp, O_RDONLY, 0);

		if (fd1 == -1 && compare_dest != NULL) {
			/* try the file at compare_dest instead */
			pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
				 compare_dest, 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(fnamecmp, O_WRONLY|O_CREAT, 0);
			if (fd2 == -1) {
				rsyserr(FERROR, errno, "open %s failed",
					full_fname(fnamecmp));
				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;
			}

			strlcpy(template, fnametmp, sizeof template);

			/* 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 snabb@epipe.fi 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) {
				strlcpy(fnametmp, template, sizeof fnametmp);
				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;
			}

			cleanup_set(fnametmp, fname, file, fd1, fd2);
		}

		if (!am_server && verbose)
			rprintf(FINFO, "%s\n", fname);

		/* recv file data */
		recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
				       fname, fd2, file->length);

		log_recv(file, &initial_stats);

		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 || keep_partial)
			finish_transfer(fname, fnametmp, file, recv_ok);
		else
			do_unlink(fnametmp);

		cleanup_disable();

		if (!recv_ok) {
			int msgtype;
			char *redostr;
			if (csum_length != SUM_LENGTH) {
				char buf[4];
				SIVAL(buf, 0, i);
				send_msg(MSG_REDO, buf, 4);
				msgtype = read_batch ? FERROR : FINFO;
				redostr = read_batch ? " Redo doubtful."
						     : " Redo pending.";
			} else {
				msgtype = FERROR;
				redostr = "";
			}
			if (verbose || read_batch) {
				rprintf(msgtype,
					"%s: %s failed verification. Update %sed.%s\n",
					msgtype == FERROR ? "ERROR" : "WARNING",
					fname, keep_partial || inplace ?
					"retain" : "discard", redostr);
			}
		}
	}
	make_backups = save_make_backups;

	if (delete_after && recurse && !local_name && flist->count > 0)
		delete_files(flist);

	if (verbose > 2)
		rprintf(FINFO,"recv_files finished\n");

	return 0;
}
Commit	Line	Data
e327acec	1	/* -- c-file-style: "linux" --
17fadf7d	2
e327acec	3	Copyright (C) 1996-2000 by Andrew Tridgell
2f03f956	4	Copyright (C) Paul Mackerras 1996
17fadf7d	5
2f03f956 AT	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2 of the License, or
	9	(at your option) any later version.
17fadf7d	10
2f03f956 AT	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
17fadf7d	15
2f03f956 AT	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	19	*/
	20
	21	#include "rsync.h"
	22
	23	extern int verbose;
	24	extern int recurse;
	25	extern int delete_mode;
92b9eb97 WD	26	extern int delete_after;
92b9eb97 WD	27	extern int max_delete;
2f03f956 AT	28	extern int csum_length;
	29	extern struct stats stats;
	30	extern int dry_run;
16cc9ca2 WD	31	extern int read_batch;
16cc9ca2 WD	32	extern int batch_gen_fd;
2f03f956 AT	33	extern int am_server;
2f03f956 AT	34	extern int relative_paths;
566fce32	35	extern int keep_dirlinks;
2f03f956	36	extern int preserve_hard_links;
92b9eb97	37	extern int preserve_perms;
2f03f956 AT	38	extern int cvs_exclude;
	39	extern int io_error;
	40	extern char *tmpdir;
375a4556	41	extern char *compare_dest;
53dd3135	42	extern int make_backups;
16417f8b	43	extern int do_progress;
d74a2e3e	44	extern char *backup_dir;
53dd3135	45	extern char *backup_suffix;
d74a2e3e	46	extern int backup_suffix_len;
925c517f	47	extern int cleanup_got_literal;
92b9eb97 WD	48	extern int module_id;
	49	extern int ignore_errors;
	50	extern int orig_umask;
55e50d89	51	extern int keep_partial;
ba582f75	52	extern int checksum_seed;
a3221d2a	53	extern int inplace;
2f03f956	54
5ebab6c1 WD	55	extern struct exclude_list_struct server_exclude_list;
	56
	57
d74a2e3e	58	static void delete_one(char *fn, int is_dir)
2f03f956	59	{
d74a2e3e WD	60	if (!is_dir) {
d74a2e3e WD	61	if (robust_unlink(fn) != 0) {
d62bcc17 WD	62	rsyserr(FERROR, errno, "delete_one: unlink %s failed",
d62bcc17 WD	63	full_fname(fn));
d2a918b4	64	} else if (verbose)
d74a2e3e	65	rprintf(FINFO, "deleting %s\n", fn);
17fadf7d	66	} else {
d74a2e3e	67	if (do_rmdir(fn) != 0) {
eb84a83b WD	68	if (errno == ENOTDIR && keep_dirlinks) {
	69	delete_one(fn, 0);
	70	return;
	71	}
d74a2e3e	72	if (errno != ENOTEMPTY && errno != EEXIST) {
d62bcc17 WD	73	rsyserr(FERROR, errno,
	74	"delete_one: rmdir %s failed",
	75	full_fname(fn));
d74a2e3e	76	}
d2a918b4	77	} else if (verbose)
d74a2e3e	78	rprintf(FINFO, "deleting directory %s\n", fn);
2f03f956 AT	79	}
	80	}
	81
	82
d74a2e3e WD	83	static int is_backup_file(char *fn)
	84	{
	85	int k = strlen(fn) - backup_suffix_len;
	86	return k > 0 && strcmp(fn+k, backup_suffix) == 0;
	87	}
2f03f956 AT	88
2f03f956 AT	89
1e82e2ce WD	90	/* This deletes any files on the receiving side that are not present
1e82e2ce WD	91	* on the sending side. */
6957ae33	92	void delete_files(struct file_list *flist)
2f03f956 AT	93	{
	94	struct file_list *local_file_list;
	95	int i, j;
a24639bb	96	char *argv[1], fbuf[MAXPATHLEN];
0b73ca12	97	static int deletion_count;
2f03f956 AT	98
	99	if (cvs_exclude)
	100	add_cvs_excludes();
	101
ef55c686	102	if (io_error && !(lp_ignore_errors(module_id) \|\| ignore_errors)) {
2f03f956 AT	103	rprintf(FINFO,"IO error encountered - skipping file deletion\n");
	104	return;
	105	}
	106
1e82e2ce	107	for (j = 0; j < flist->count; j++) {
a5342644 WD	108	if (!(flist->files[j]->flags & FLAG_TOP_DIR)
	109	\|\| !S_ISDIR(flist->files[j]->mode))
	110	continue;
2f03f956	111
a24639bb	112	argv[0] = f_name_to(flist->files[j], fbuf);
2f03f956	113
a24639bb	114	if (!(local_file_list = send_file_list(-1, 1, argv)))
2f03f956	115	continue;
2f03f956 AT	116
2f03f956 AT	117	if (verbose > 1)
92b9eb97	118	rprintf(FINFO, "deleting in %s\n", fbuf);
2f03f956	119
446e239e	120	for (i = local_file_list->count-1; i >= 0; i--) {
92b9eb97 WD	121	if (max_delete && deletion_count > max_delete)
	122	break;
	123	if (!local_file_list->files[i]->basename)
	124	continue;
	125	if (flist_find(flist,local_file_list->files[i]) < 0) {
53dd3135	126	char *f = f_name(local_file_list->files[i]);
d74a2e3e	127	if (make_backups && (backup_dir \|\| !is_backup_file(f))) {
d2a918b4	128	make_backup(f);
d74a2e3e WD	129	if (verbose)
d74a2e3e WD	130	rprintf(FINFO, "deleting %s\n", f);
53dd3135	131	} else {
d74a2e3e WD	132	int mode = local_file_list->files[i]->mode;
d74a2e3e WD	133	delete_one(f, S_ISDIR(mode) != 0);
53dd3135	134	}
31f3b68a	135	deletion_count++;
53dd3135	136	}
2f03f956 AT	137	}
2f03f956 AT	138	flist_free(local_file_list);
2f03f956 AT	139	}
	140	}
	141
	142
52d3e106 S	143	/*
	144	* get_tmpname() - create a tmp filename for a given filename
	145	*
	146	* If a tmpdir is defined, use that as the directory to
	147	* put it in. Otherwise, the tmp filename is in the same
	148	* directory as the given name. Note that there may be no
	149	* directory at all in the given name!
17fadf7d	150	*
52d3e106 S	151	* The tmp filename is basically the given filename with a
	152	* dot prepended, and .XXXXXX appended (for mkstemp() to
	153	* put its unique gunk in). Take care to not exceed
	154	* either the MAXPATHLEN or NAME_MAX, esp. the last, as
	155	* the basename basically becomes 8 chars longer. In that
	156	* case, the original name is shortened sufficiently to
	157	* make it all fit.
17fadf7d	158	*
52d3e106 S	159	* Of course, there's no real reason for the tmp name to
	160	* look like the original, except to satisfy us humans.
	161	* As long as it's unique, rsync will work.
	162	*/
	163
2f03f956 AT	164	static int get_tmpname(char fnametmp, char fname)
	165	{
	166	char *f;
52d3e106 S	167	int length = 0;
52d3e106 S	168	int maxname;
2f03f956	169
2f03f956	170	if (tmpdir) {
a24639bb	171	/* Note: this can't overflow, so the return value is safe */
b7cee949	172	length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
52d3e106 S	173	fnametmp[length++] = '/';
52d3e106 S	174	fnametmp[length] = '\0'; /* always NULL terminated */
0c2ef5f4	175	}
52d3e106	176
0c2ef5f4	177	if ((f = strrchr(fname, '/')) != NULL) {
52d3e106 S	178	++f;
	179	if (!tmpdir) {
	180	length = f - fname;
0c2ef5f4	181	/* copy up to and including the slash */
52d3e106	182	strlcpy(fnametmp, fname, length + 1);
0c2ef5f4	183	}
446e239e	184	} else
52d3e106	185	f = fname;
52d3e106 S	186	fnametmp[length++] = '.';
52d3e106 S	187	fnametmp[length] = '\0'; /* always NULL terminated */
2f03f956	188
52d3e106	189	maxname = MIN(MAXPATHLEN - 7 - length, NAME_MAX - 8);
2f03f956	190
0c2ef5f4	191	if (maxname < 1) {
52d3e106 S	192	rprintf(FERROR, "temporary filename too long: %s\n", fname);
52d3e106 S	193	fnametmp[0] = '\0';
2f03f956 AT	194	return 0;
	195	}
	196
17fadf7d	197	strlcpy(fnametmp + length, f, maxname);
52d3e106	198	strcat(fnametmp + length, ".XXXXXX");
2f03f956 AT	199
	200	return 1;
	201	}
	202
	203
7e5fa372 WD	204	static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
7e5fa372 WD	205	char *fname, int fd, OFF_T total_size)
2f03f956	206	{
7e5fa372 WD	207	static char file_sum1[MD4_SUM_LENGTH];
	208	static char file_sum2[MD4_SUM_LENGTH];
	209	struct map_struct *mapbuf;
fc0257c9 S	210	struct sum_struct sum;
fc0257c9 S	211	unsigned int len;
2f03f956 AT	212	OFF_T offset = 0;
	213	OFF_T offset2;
	214	char *data;
7e5fa372	215	int i;
e1f67417	216	char *map = NULL;
17fadf7d	217
fc0257c9	218	read_sum_head(f_in, &sum);
17fadf7d	219
7e5fa372 WD	220	if (fd_r >= 0 && size_r > 0) {
	221	mapbuf = map_file(fd_r, size_r, sum.blength);
	222	if (verbose > 2) {
	223	rprintf(FINFO, "recv mapped %s of size %.0f\n",
	224	fname_r, (double)size_r);
	225	}
	226	} else
	227	mapbuf = NULL;
	228
ba582f75	229	sum_init(checksum_seed);
17fadf7d	230
3f55bd5d	231	while ((i = recv_token(f_in, &data)) != 0) {
16417f8b WD	232	if (do_progress)
16417f8b WD	233	show_progress(offset, total_size);
2f03f956 AT	234
2f03f956 AT	235	if (i > 0) {
2f03f956	236	if (verbose > 3) {
5f808dfb AT	237	rprintf(FINFO,"data recv %d at %.0f\n",
5f808dfb AT	238	i,(double)offset);
2f03f956 AT	239	}
	240
	241	stats.literal_data += i;
	242	cleanup_got_literal = 1;
17fadf7d	243
2f03f956 AT	244	sum_update(data,i);
	245
	246	if (fd != -1 && write_file(fd,data,i) != i) {
d62bcc17 WD	247	rsyserr(FERROR, errno, "write failed on %s",
d62bcc17 WD	248	full_fname(fname));
65417579	249	exit_cleanup(RERR_FILEIO);
2f03f956 AT	250	}
	251	offset += i;
	252	continue;
17fadf7d	253	}
2f03f956 AT	254
2f03f956 AT	255	i = -(i+1);
fc0257c9 S	256	offset2 = i*(OFF_T)sum.blength;
fc0257c9 S	257	len = sum.blength;
d2a918b4	258	if (i == (int)sum.count-1 && sum.remainder != 0)
fc0257c9	259	len = sum.remainder;
17fadf7d	260
2f03f956	261	stats.matched_data += len;
17fadf7d	262
2f03f956	263	if (verbose > 3)
5f808dfb AT	264	rprintf(FINFO,"chunk[%d] of size %d at %.0f offset=%.0f\n",
5f808dfb AT	265	i,len,(double)offset2,(double)offset);
17fadf7d	266
446e239e WD	267	if (mapbuf) {
446e239e WD	268	map = map_ptr(mapbuf,offset2,len);
17fadf7d	269
c55f7021 AT	270	see_token(map, len);
	271	sum_update(map,len);
	272	}
17fadf7d	273
a3221d2a WD	274	if (!inplace \|\| offset != offset2) {
	275	if (fd != -1 && write_file(fd, map, len) != (int)len) {
	276	rsyserr(FERROR, errno, "write failed on %s",
	277	full_fname(fname));
	278	exit_cleanup(RERR_FILEIO);
	279	}
	280	} else {
	281	flush_write_file(fd);
	282	if (do_lseek(fd,(OFF_T)len,SEEK_CUR) != offset+len) {
	283	rprintf(FERROR, "lseek failed on %s: %s, %lli, %lli, %i\n",
7e5fa372 WD	284	full_fname(fname), strerror(errno),
	285	do_lseek(fd, 0, SEEK_CUR),
	286	offset + len, i);
a3221d2a WD	287	exit_cleanup(RERR_FILEIO);
a3221d2a WD	288	}
2f03f956 AT	289	}
	290	offset += len;
	291	}
	292
76c21947 WD	293	flush_write_file(fd);
76c21947 WD	294
a3221d2a WD	295	#ifdef HAVE_FTRUNCATE
	296	if (inplace)
	297	ftruncate(fd, offset);
	298	#endif
	299
16417f8b WD	300	if (do_progress)
16417f8b WD	301	end_progress(total_size);
2f03f956 AT	302
2f03f956 AT	303	if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
d62bcc17 WD	304	rsyserr(FERROR, errno, "write failed on %s",
d62bcc17 WD	305	full_fname(fname));
65417579	306	exit_cleanup(RERR_FILEIO);
2f03f956 AT	307	}
	308
	309	sum_end(file_sum1);
	310
7e5fa372 WD	311	if (mapbuf)
	312	unmap_file(mapbuf);
	313
bc63ae3f	314	read_buf(f_in,file_sum2,MD4_SUM_LENGTH);
d2a918b4	315	if (verbose > 2)
bc63ae3f	316	rprintf(FINFO,"got file_sum\n");
d2a918b4	317	if (fd != -1 && memcmp(file_sum1, file_sum2, MD4_SUM_LENGTH) != 0)
bc63ae3f	318	return 0;
2f03f956 AT	319	return 1;
	320	}
	321
	322
8ed9d849 WD	323	static void discard_receive_data(int f_in, OFF_T length)
8ed9d849 WD	324	{
7e5fa372	325	receive_data(f_in, NULL, -1, 0, NULL, -1, length);
8ed9d849 WD	326	}
	327
	328
b35d0d8e MP	329	/**
	330	* main routine for receiver process.
	331	*
	332	* Receiver process runs on the same host as the generator process. */
d3979b02	333	int recv_files(int f_in, struct file_list flist, char local_name)
17fadf7d	334	{
16cc9ca2	335	int next_gen_i = -1;
2f03f956 AT	336	int fd1,fd2;
2f03f956 AT	337	STRUCT_STAT st;
446e239e	338	char *fname, fbuf[MAXPATHLEN];
f62c17e3	339	char template[MAXPATHLEN];
2f03f956	340	char fnametmp[MAXPATHLEN];
375a4556 DD	341	char *fnamecmp;
375a4556 DD	342	char fnamecmpbuf[MAXPATHLEN];
2f03f956	343	struct file_struct *file;
1b7c47cb	344	struct stats initial_stats;
4e834af1 WD	345	int save_make_backups = make_backups;
4e834af1 WD	346	int i, recv_ok, phase = 0;
11a5a3c7	347
d2a918b4	348	if (verbose > 2)
2f03f956	349	rprintf(FINFO,"recv_files(%d) starting\n",flist->count);
2f03f956	350
cb869c26	351	if (flist->hlink_pool) {
9935066b S	352	pool_destroy(flist->hlink_pool);
	353	flist->hlink_pool = NULL;
	354	}
	355
17fadf7d	356	while (1) {
2f03f956 AT	357	cleanup_disable();
	358
	359	i = read_int(f_in);
	360	if (i == -1) {
16cc9ca2 WD	361	if (read_batch) {
	362	if (next_gen_i != flist->count)
	363	while (read_int(batch_gen_fd) != -1) {}
	364	next_gen_i = -1;
	365	}
	366
4e834af1 WD	367	if (phase)
4e834af1 WD	368	break;
5ebab6c1	369
4e834af1 WD	370	phase = 1;
	371	csum_length = SUM_LENGTH;
	372	if (verbose > 2)
	373	rprintf(FINFO, "recv_files phase=%d\n", phase);
	374	send_msg(MSG_DONE, "", 0);
	375	if (keep_partial)
	376	make_backups = 0; /* prevents double backup */
	377	continue;
2f03f956 AT	378	}
	379
	380	if (i < 0 \|\| i >= flist->count) {
17fadf7d	381	rprintf(FERROR,"Invalid file index %d in recv_files (count=%d)\n",
2f03f956	382	i, flist->count);
65417579	383	exit_cleanup(RERR_PROTOCOL);
2f03f956 AT	384	}
	385
	386	file = flist->files[i];
2f03f956	387
97feb557	388	stats.current_file_index = i;
2f03f956 AT	389	stats.num_transferred_files++;
2f03f956 AT	390	stats.total_transferred_size += file->length;
925c517f	391	cleanup_got_literal = 0;
2f03f956 AT	392
	393	if (local_name)
	394	fname = local_name;
446e239e	395	else
3fef5364	396	fname = f_name_to(file, fbuf);
2f03f956 AT	397
2f03f956 AT	398	if (dry_run) {
d2a918b4	399	if (!am_server && verbose)
42d4edc0	400	rprintf(FINFO, "%s\n", fname);
2f03f956 AT	401	continue;
	402	}
	403
1b7c47cb AT	404	initial_stats = stats;
1b7c47cb AT	405
2f03f956 AT	406	if (verbose > 2)
	407	rprintf(FINFO,"recv_files(%s)\n",fname);
	408
375a4556 DD	409	fnamecmp = fname;
375a4556 DD	410
16cc9ca2 WD	411	if (read_batch) {
	412	while (i > next_gen_i) {
	413	next_gen_i = read_int(batch_gen_fd);
	414	if (next_gen_i == -1)
	415	next_gen_i = flist->count;
	416	}
	417	if (i < next_gen_i) {
	418	rprintf(FINFO, "skipping update for \"%s\"\n",
	419	fname);
	420	discard_receive_data(f_in, file->length);
	421	continue;
	422	}
	423	}
	424
5ebab6c1 WD	425	if (server_exclude_list.head
	426	&& check_exclude(&server_exclude_list, fname,
	427	S_ISDIR(file->mode)) < 0) {
	428	if (verbose) {
	429	rprintf(FINFO,
	430	"skipping server-excluded update for \"%s\"\n",
	431	fname);
	432	}
8ed9d849	433	discard_receive_data(f_in, file->length);
5ebab6c1 WD	434	continue;
	435	}
	436
17fadf7d	437	/* open the file */
8c9fd200	438	fd1 = do_open(fnamecmp, O_RDONLY, 0);
375a4556	439
c338460d	440	if (fd1 == -1 && compare_dest != NULL) {
375a4556	441	/* try the file at compare_dest instead */
f91e01d9 WD	442	pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
f91e01d9 WD	443	compare_dest, fname);
375a4556	444	fnamecmp = fnamecmpbuf;
8c9fd200	445	fd1 = do_open(fnamecmp, O_RDONLY, 0);
375a4556	446	}
2f03f956 AT	447
2f03f956 AT	448	if (fd1 != -1 && do_fstat(fd1,&st) != 0) {
d62bcc17 WD	449	rsyserr(FERROR, errno, "fstat %s failed",
d62bcc17 WD	450	full_fname(fnamecmp));
8ed9d849	451	discard_receive_data(f_in, file->length);
2f03f956 AT	452	close(fd1);
	453	continue;
	454	}
	455
350e4e4d S	456	if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
	457	/* this special handling for directories
	458	* wouldn't be necessary if robust_rename()
	459	* and the underlying robust_unlink could cope
	460	* with directories
	461	*/
ea42541f WD	462	rprintf(FERROR,"recv_files: %s is a directory\n",
ea42541f WD	463	full_fname(fnamecmp));
8ed9d849	464	discard_receive_data(f_in, file->length);
2f03f956 AT	465	close(fd1);
	466	continue;
	467	}
	468
350e4e4d S	469	if (fd1 != -1 && !S_ISREG(st.st_mode)) {
	470	close(fd1);
	471	fd1 = -1;
350e4e4d S	472	}
350e4e4d S	473
4df9f368	474	if (fd1 != -1 && !preserve_perms) {
85ed0aa3	475	/* if the file exists already and we aren't preserving
17fadf7d WD	476	* permissions then act as though the remote end sent
17fadf7d WD	477	* us the file permissions we already have */
4df9f368 AT	478	file->mode = st.st_mode;
	479	}
	480
a3221d2a WD	481	/* We now check to see if we are writing file "inplace" */
	482	if (inplace) {
	483	fd2 = do_open(fnamecmp, O_WRONLY\|O_CREAT, 0);
	484	if (fd2 == -1) {
	485	rsyserr(FERROR, errno, "open %s failed",
	486	full_fname(fnamecmp));
8ed9d849	487	discard_receive_data(f_in, file->length);
a3221d2a WD	488	if (fd1 != -1)
	489	close(fd1);
	490	continue;
	491	}
	492	} else {
	493	if (!get_tmpname(fnametmp,fname)) {
8ed9d849	494	discard_receive_data(f_in, file->length);
a3221d2a WD	495	if (fd1 != -1)
	496	close(fd1);
	497	continue;
	498	}
	499
	500	strlcpy(template, fnametmp, sizeof template);
2f03f956	501
a3221d2a WD	502	/* we initially set the perms without the
	503	* setuid/setgid bits to ensure that there is no race
	504	* condition. They are then correctly updated after
	505	* the lchown. Thanks to snabb@epipe.fi for pointing
	506	* this out. We also set it initially without group
	507	* access because of a similar race condition. */
f62c17e3	508	fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
17fadf7d	509
a3221d2a WD	510	/* in most cases parent directories will already exist
	511	* because their information should have been previously
	512	* transferred, but that may not be the case with -R */
	513	if (fd2 == -1 && relative_paths && errno == ENOENT
	514	&& create_directory_path(fnametmp, orig_umask) == 0) {
	515	strlcpy(fnametmp, template, sizeof fnametmp);
	516	fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
	517	}
	518	if (fd2 == -1) {
	519	rsyserr(FERROR, errno, "mkstemp %s failed",
	520	full_fname(fnametmp));
8ed9d849	521	discard_receive_data(f_in, file->length);
a3221d2a WD	522	if (fd1 != -1)
	523	close(fd1);
	524	continue;
	525	}
	526
7e5fa372	527	cleanup_set(fnametmp, fname, file, fd1, fd2);
a3221d2a	528	}
2f03f956	529
d2a918b4	530	if (!am_server && verbose)
42d4edc0	531	rprintf(FINFO, "%s\n", fname);
11a5a3c7	532
2f03f956	533	/* recv file data */
7e5fa372 WD	534	recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
7e5fa372 WD	535	fname, fd2, file->length);
1b7c47cb AT	536
1b7c47cb AT	537	log_recv(file, &initial_stats);
17fadf7d	538
d2a918b4	539	if (fd1 != -1)
2f03f956	540	close(fd1);
9f27cd8c	541	if (close(fd2) < 0) {
d62bcc17 WD	542	rsyserr(FERROR, errno, "close failed on %s",
d62bcc17 WD	543	full_fname(fnametmp));
9f27cd8c WD	544	exit_cleanup(RERR_FILEIO);
9f27cd8c WD	545	}
17fadf7d	546
55e50d89 WD	547	if (recv_ok \|\| keep_partial)
	548	finish_transfer(fname, fnametmp, file, recv_ok);
	549	else
	550	do_unlink(fnametmp);
c6b81a98	551
2f03f956	552	cleanup_disable();
554e0a8d	553
2f03f956	554	if (!recv_ok) {
e2bc4126 WD	555	int msgtype;
	556	char *redostr;
	557	if (csum_length != SUM_LENGTH) {
0569a133	558	char buf[4];
0569a133 WD	559	SIVAL(buf, 0, i);
0569a133 WD	560	send_msg(MSG_REDO, buf, 4);
e2bc4126 WD	561	msgtype = read_batch ? FERROR : FINFO;
	562	redostr = read_batch ? " Redo doubtful."
	563	: " Redo pending.";
	564	} else {
	565	msgtype = FERROR;
	566	redostr = "";
	567	}
	568	if (verbose \|\| read_batch) {
	569	rprintf(msgtype,
	570	"%s: %s failed verification. Update %sed.%s\n",
	571	msgtype == FERROR ? "ERROR" : "WARNING",
	572	fname, keep_partial \|\| inplace ?
	573	"retain" : "discard", redostr);
2f03f956 AT	574	}
	575	}
	576	}
4e834af1	577	make_backups = save_make_backups;
2f03f956	578
e76ca145	579	if (delete_after && recurse && !local_name && flist->count > 0)
3f55bd5d	580	delete_files(flist);
57df171b	581
2f03f956 AT	582	if (verbose > 2)
2f03f956 AT	583	rprintf(FINFO,"recv_files finished\n");
17fadf7d	584
2f03f956 AT	585	return 0;
2f03f956 AT	586	}