[thirdparty/rsync.git] / backup.c

/*
 * Backup handling code.
 *
 * Copyright (C) 1999 Andrew Tridgell
 * Copyright (C) 2003-2022 Wayne Davison
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, visit the http://fsf.org website.
 */

#include "rsync.h"
#include "ifuncs.h"

extern int am_root;
extern int preserve_acls;
extern int preserve_xattrs;
extern int preserve_devices;
extern int preserve_specials;
extern int preserve_links;
extern int safe_symlinks;
extern int backup_dir_len;
extern unsigned int backup_dir_remainder;
extern char backup_dir_buf[MAXPATHLEN];
extern char *backup_suffix;
extern char *backup_dir;

/* Returns -1 on error, 0 on missing dir, and 1 on present dir. */
static int validate_backup_dir(void)
{
	STRUCT_STAT st;

	if (do_lstat(backup_dir_buf, &st) < 0) {
		if (errno == ENOENT)
			return 0;
		rsyserr(FERROR, errno, "backup lstat %s failed", backup_dir_buf);
		return -1;
	}
	if (!S_ISDIR(st.st_mode)) {
		int flags = get_del_for_flag(st.st_mode) | DEL_FOR_BACKUP | DEL_RECURSE;
		if (delete_item(backup_dir_buf, st.st_mode, flags) == 0)
			return 0;
		return -1;
	}
	return 1;
}

/* Create a backup path from the given fname, putting the result into
 * backup_dir_buf.  Any new directories (compared to the prior backup
 * path) are ensured to exist as directories, replacing anything else
 * that may be in the way (e.g. a symlink). */
static BOOL copy_valid_path(const char *fname)
{
	const char *f;
	int val;
	BOOL ret = True;
	stat_x sx;
	char *b, *rel = backup_dir_buf + backup_dir_len, *name = rel;

	for (f = fname, b = rel; *f && *f == *b; f++, b++) {
		if (*b == '/')
			name = b + 1;
	}

	if (stringjoin(rel, backup_dir_remainder, fname, backup_suffix, NULL) >= backup_dir_remainder) {
		rprintf(FERROR, "backup filename too long\n");
		*name = '\0';
		return False;
	}

	for ( ; ; name = b + 1) {
		if ((b = strchr(name, '/')) == NULL)
			return True;
		*b = '\0';

		val = validate_backup_dir();
		if (val == 0)
			break;
		if (val < 0) {
			*name = '\0';
			return False;
		}

		*b = '/';
	}

	init_stat_x(&sx);

	for ( ; b; name = b + 1, b = strchr(name, '/')) {
		*b = '\0';

		while (do_mkdir(backup_dir_buf, ACCESSPERMS) < 0) {
			if (errno == EEXIST) {
				val = validate_backup_dir();
				if (val > 0)
					break;
				if (val == 0)
					continue;
			} else
				rsyserr(FERROR, errno, "backup mkdir %s failed", backup_dir_buf);
			*name = '\0';
			ret = False;
			goto cleanup;
		}

		/* Try to transfer the directory settings of the actual dir
		 * that the files are coming from. */
		if (x_stat(rel, &sx.st, NULL) < 0)
			rsyserr(FERROR, errno, "backup stat %s failed", full_fname(rel));
		else {
			struct file_struct *file;
			if (!(file = make_file(rel, NULL, NULL, 0, NO_FILTERS)))
				continue;
#ifdef SUPPORT_ACLS
			if (preserve_acls && !S_ISLNK(file->mode)) {
				get_acl(rel, &sx);
				cache_tmp_acl(file, &sx);
				free_acl(&sx);
			}
#endif
#ifdef SUPPORT_XATTRS
			if (preserve_xattrs) {
				get_xattr(rel, &sx);
				cache_tmp_xattr(file, &sx);
				free_xattr(&sx);
			}
#endif
			set_file_attrs(backup_dir_buf, file, NULL, NULL, 0);
			unmake_file(file);
		}

		*b = '/';
	}

  cleanup:

#ifdef SUPPORT_ACLS
	uncache_tmp_acls();
#endif
#ifdef SUPPORT_XATTRS
	uncache_tmp_xattrs();
#endif

	return ret;
}

/* Make a complete pathname for backup file and verify any new path elements. */
char *get_backup_name(const char *fname)
{
	if (backup_dir) {
		static int initialized = 0;
		if (!initialized) {
			int ret;
			if (backup_dir_len > 1)
				backup_dir_buf[backup_dir_len-1] = '\0';
			ret = make_path(backup_dir_buf, 0);
			if (backup_dir_len > 1)
				backup_dir_buf[backup_dir_len-1] = '/';
			if (ret < 0)
				return NULL;
			initialized = 1;
		}
		/* copy fname into backup_dir_buf while validating the dirs. */
		if (copy_valid_path(fname))
			return backup_dir_buf;
		/* copy_valid_path() has printed an error message. */
		return NULL;
	}

	if (stringjoin(backup_dir_buf, MAXPATHLEN, fname, backup_suffix, NULL) < MAXPATHLEN)
		return backup_dir_buf;

	rprintf(FERROR, "backup filename too long\n");
	return NULL;
}

/* Has same return codes as make_backup(). */
static inline int link_or_rename(const char *from, const char *to,
				 BOOL prefer_rename, STRUCT_STAT *stp)
{
#ifdef SUPPORT_HARD_LINKS
	if (!prefer_rename) {
#ifndef CAN_HARDLINK_SYMLINK
		if (S_ISLNK(stp->st_mode))
			return 0; /* Use copy code. */
#endif
#ifndef CAN_HARDLINK_SPECIAL
		if (IS_SPECIAL(stp->st_mode) || IS_DEVICE(stp->st_mode))
			return 0; /* Use copy code. */
#endif
		if (do_link(from, to) == 0) {
			if (DEBUG_GTE(BACKUP, 1))
				rprintf(FINFO, "make_backup: HLINK %s successful.\n", from);
			return 2;
		}
		/* We prefer to rename a regular file rather than copy it. */
		if (!S_ISREG(stp->st_mode) || errno == EEXIST || errno == EISDIR)
			return 0;
	}
#endif
	if (do_rename(from, to) == 0) {
		if (stp->st_nlink > 1 && !S_ISDIR(stp->st_mode)) {
			/* If someone has hard-linked the file into the backup
			 * dir, rename() might return success but do nothing! */
			robust_unlink(from); /* Just in case... */
		}
		if (DEBUG_GTE(BACKUP, 1))
			rprintf(FINFO, "make_backup: RENAME %s successful.\n", from);
		return 1;
	}
	return 0;
}

/* Hard-link, rename, or copy an item to the backup name.  Returns 0 for
 * failure, 1 if item was moved, 2 if item was duplicated or hard linked
 * into backup area, or 3 if item doesn't exist or isn't a regular file. */
int make_backup(const char *fname, BOOL prefer_rename)
{
	stat_x sx;
	struct file_struct *file;
	int save_preserve_xattrs;
	char *buf;
	int ret = 0;

	init_stat_x(&sx);
	/* Return success if no file to keep. */
	if (x_lstat(fname, &sx.st, NULL) < 0)
		return 3;

	if (!(buf = get_backup_name(fname)))
		return 0;

	/* Try a hard-link or a rename first.  Using rename is not atomic, but
	 * is more efficient than forcing a copy for larger files when no hard-
	 * linking is possible. */
	if ((ret = link_or_rename(fname, buf, prefer_rename, &sx.st)) != 0)
		goto success;
	if (errno == EEXIST || errno == EISDIR) {
		STRUCT_STAT bakst;
		if (do_lstat(buf, &bakst) == 0) {
			int flags = get_del_for_flag(bakst.st_mode) | DEL_FOR_BACKUP | DEL_RECURSE;
			if (delete_item(buf, bakst.st_mode, flags) != 0)
				return 0;
		}
		if ((ret = link_or_rename(fname, buf, prefer_rename, &sx.st)) != 0)
			goto success;
	}

	/* Fall back to making a copy. */
	if (!(file = make_file(fname, NULL, &sx.st, 0, NO_FILTERS)))
		return 3; /* the file could have disappeared */

#ifdef SUPPORT_ACLS
	if (preserve_acls && !S_ISLNK(file->mode)) {
		get_acl(fname, &sx);
		cache_tmp_acl(file, &sx);
		free_acl(&sx);
	}
#endif
#ifdef SUPPORT_XATTRS
	if (preserve_xattrs) {
		get_xattr(fname, &sx);
		cache_tmp_xattr(file, &sx);
		free_xattr(&sx);
	}
#endif

	/* Check to see if this is a device file, or link */
	if ((am_root && preserve_devices && IS_DEVICE(file->mode))
	 || (preserve_specials && IS_SPECIAL(file->mode))) {
		if (do_mknod(buf, file->mode, sx.st.st_rdev) < 0)
			rsyserr(FERROR, errno, "mknod %s failed", full_fname(buf));
		else if (DEBUG_GTE(BACKUP, 1))
			rprintf(FINFO, "make_backup: DEVICE %s successful.\n", fname);
		ret = 2;
	}

#ifdef SUPPORT_LINKS
	if (!ret && preserve_links && S_ISLNK(file->mode)) {
		const char *sl = F_SYMLINK(file);
		if (safe_symlinks && unsafe_symlink(sl, fname)) {
			if (INFO_GTE(SYMSAFE, 1)) {
				rprintf(FINFO, "not backing up unsafe symlink \"%s\" -> \"%s\"\n",
					fname, sl);
			}
			ret = 2;
		} else {
			if (do_symlink(sl, buf) < 0)
				rsyserr(FERROR, errno, "link %s -> \"%s\"", full_fname(buf), sl);
			else if (DEBUG_GTE(BACKUP, 1))
				rprintf(FINFO, "make_backup: SYMLINK %s successful.\n", fname);
			ret = 2;
		}
	}
#endif

	if (!ret && !S_ISREG(file->mode)) {
		if (INFO_GTE(NONREG, 1))
			rprintf(FINFO, "make_bak: skipping non-regular file %s\n", fname);
		unmake_file(file);
#ifdef SUPPORT_ACLS
		uncache_tmp_acls();
#endif
#ifdef SUPPORT_XATTRS
		uncache_tmp_xattrs();
#endif
		return 3;
	}

	/* Copy to backup tree if a file. */
	if (!ret) {
		if (copy_file(fname, buf, -1, file->mode) < 0) {
			rsyserr(FERROR, errno, "keep_backup failed: %s -> \"%s\"",
				full_fname(fname), buf);
			unmake_file(file);
#ifdef SUPPORT_ACLS
			uncache_tmp_acls();
#endif
#ifdef SUPPORT_XATTRS
			uncache_tmp_xattrs();
#endif
			return 0;
		}
		if (DEBUG_GTE(BACKUP, 1))
			rprintf(FINFO, "make_backup: COPY %s successful.\n", fname);
		ret = 2;
	}

	save_preserve_xattrs = preserve_xattrs;
	preserve_xattrs = 0;
	set_file_attrs(buf, file, NULL, fname, ATTRS_ACCURATE_TIME);
	preserve_xattrs = save_preserve_xattrs;

	unmake_file(file);
#ifdef SUPPORT_ACLS
	uncache_tmp_acls();
#endif
#ifdef SUPPORT_XATTRS
	uncache_tmp_xattrs();
#endif

  success:
	if (INFO_GTE(BACKUP, 1))
		rprintf(FINFO, "backed up %s to %s\n", fname, buf);
	return ret;
}
Commit	Line	Data
addf0c4a	1	/*
0f78b815 WD	2	* Backup handling code.
	3	*
	4	* Copyright (C) 1999 Andrew Tridgell
c3b553a9	5	* Copyright (C) 2003-2022 Wayne Davison
0f78b815 WD	6	*
0f78b815 WD	7	* This program is free software; you can redistribute it and/or modify
8e41b68e WD	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 3 of the License, or
	10	* (at your option) any later version.
0f78b815 WD	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
e7c67065	17	* You should have received a copy of the GNU General Public License along
4fd842f9	18	* with this program; if not, visit the http://fsf.org website.
0f78b815	19	*/
3d19b4c8 AT	20
3d19b4c8 AT	21	#include "rsync.h"
09ca0d15	22	#include "ifuncs.h"
3d19b4c8	23
378a074c	24	extern int am_root;
1c3344a1	25	extern int preserve_acls;
16edf865	26	extern int preserve_xattrs;
378a074c	27	extern int preserve_devices;
b5c6a6ae	28	extern int preserve_specials;
378a074c	29	extern int preserve_links;
377dbd20	30	extern int safe_symlinks;
6b2a3d5d	31	extern int backup_dir_len;
82ad07c4 WD	32	extern unsigned int backup_dir_remainder;
	33	extern char backup_dir_buf[MAXPATHLEN];
	34	extern char *backup_suffix;
	35	extern char *backup_dir;
378a074c	36
9b594a53 WD	37	/* Returns -1 on error, 0 on missing dir, and 1 on present dir. */
	38	static int validate_backup_dir(void)
	39	{
	40	STRUCT_STAT st;
	41
	42	if (do_lstat(backup_dir_buf, &st) < 0) {
	43	if (errno == ENOENT)
	44	return 0;
	45	rsyserr(FERROR, errno, "backup lstat %s failed", backup_dir_buf);
	46	return -1;
	47	}
	48	if (!S_ISDIR(st.st_mode)) {
	49	int flags = get_del_for_flag(st.st_mode) \| DEL_FOR_BACKUP \| DEL_RECURSE;
	50	if (delete_item(backup_dir_buf, st.st_mode, flags) == 0)
	51	return 0;
	52	return -1;
	53	}
	54	return 1;
	55	}
	56
3696674b WD	57	/* Create a backup path from the given fname, putting the result into
	58	* backup_dir_buf. Any new directories (compared to the prior backup
	59	* path) are ensured to exist as directories, replacing anything else
	60	* that may be in the way (e.g. a symlink). */
	61	static BOOL copy_valid_path(const char *fname)
378a074c	62	{
3696674b	63	const char *f;
9b594a53	64	int val;
3696674b	65	BOOL ret = True;
13710874	66	stat_x sx;
3696674b	67	char b, rel = backup_dir_buf + backup_dir_len, *name = rel;
de0e2250	68
3696674b WD	69	for (f = fname, b = rel; f && f == *b; f++, b++) {
	70	if (*b == '/')
	71	name = b + 1;
e1ac7791 WD	72	}
e1ac7791 WD	73
3696674b WD	74	if (stringjoin(rel, backup_dir_remainder, fname, backup_suffix, NULL) >= backup_dir_remainder) {
	75	rprintf(FERROR, "backup filename too long\n");
	76	*name = '\0';
	77	return False;
	78	}
e1ac7791	79
3696674b WD	80	for ( ; ; name = b + 1) {
	81	if ((b = strchr(name, '/')) == NULL)
	82	return True;
	83	*b = '\0';
de0e2250	84
9b594a53 WD	85	val = validate_backup_dir();
	86	if (val == 0)
	87	break;
	88	if (val < 0) {
3696674b WD	89	*name = '\0';
3696674b WD	90	return False;
de0e2250	91	}
3696674b WD	92
3696674b WD	93	*b = '/';
47d6a60c	94	}
de0e2250	95
3696674b WD	96	init_stat_x(&sx);
	97
	98	for ( ; b; name = b + 1, b = strchr(name, '/')) {
	99	*b = '\0';
	100
9fbec6e4	101	while (do_mkdir(backup_dir_buf, ACCESSPERMS) < 0) {
9b594a53 WD	102	if (errno == EEXIST) {
	103	val = validate_backup_dir();
	104	if (val > 0)
	105	break;
	106	if (val == 0)
	107	continue;
	108	} else
	109	rsyserr(FERROR, errno, "backup mkdir %s failed", backup_dir_buf);
3696674b WD	110	*name = '\0';
3696674b WD	111	ret = False;
9b594a53	112	goto cleanup;
3696674b WD	113	}
	114
	115	/* Try to transfer the directory settings of the actual dir
	116	* that the files are coming from. */
	117	if (x_stat(rel, &sx.st, NULL) < 0)
	118	rsyserr(FERROR, errno, "backup stat %s failed", full_fname(rel));
	119	else {
	120	struct file_struct *file;
	121	if (!(file = make_file(rel, NULL, NULL, 0, NO_FILTERS)))
	122	continue;
1c3344a1	123	#ifdef SUPPORT_ACLS
3696674b WD	124	if (preserve_acls && !S_ISLNK(file->mode)) {
	125	get_acl(rel, &sx);
	126	cache_tmp_acl(file, &sx);
	127	free_acl(&sx);
	128	}
1e999f9f	129	#endif
16edf865	130	#ifdef SUPPORT_XATTRS
3696674b WD	131	if (preserve_xattrs) {
	132	get_xattr(rel, &sx);
	133	cache_tmp_xattr(file, &sx);
	134	free_xattr(&sx);
	135	}
16edf865	136	#endif
3696674b WD	137	set_file_attrs(backup_dir_buf, file, NULL, NULL, 0);
	138	unmake_file(file);
	139	}
	140
	141	*b = '/';
	142	}
	143
9b594a53 WD	144	cleanup:
9b594a53 WD	145
cb197514	146	#ifdef SUPPORT_ACLS
3696674b	147	uncache_tmp_acls();
cb197514 WD	148	#endif
cb197514 WD	149	#ifdef SUPPORT_XATTRS
3696674b	150	uncache_tmp_xattrs();
cb197514	151	#endif
3696674b WD	152
	153	return ret;
	154	}
	155
	156	/* Make a complete pathname for backup file and verify any new path elements. */
	157	char get_backup_name(const char fname)
	158	{
	159	if (backup_dir) {
abfb41e6 WD	160	static int initialized = 0;
	161	if (!initialized) {
	162	int ret;
	163	if (backup_dir_len > 1)
	164	backup_dir_buf[backup_dir_len-1] = '\0';
	165	ret = make_path(backup_dir_buf, 0);
	166	if (backup_dir_len > 1)
	167	backup_dir_buf[backup_dir_len-1] = '/';
	168	if (ret < 0)
	169	return NULL;
	170	initialized = 1;
	171	}
3696674b WD	172	/* copy fname into backup_dir_buf while validating the dirs. */
	173	if (copy_valid_path(fname))
	174	return backup_dir_buf;
0b8a9bd6	175	/* copy_valid_path() has printed an error message. */
3696674b	176	return NULL;
47d6a60c	177	}
de0e2250	178
0b8a9bd6 MM	179	if (stringjoin(backup_dir_buf, MAXPATHLEN, fname, backup_suffix, NULL) < MAXPATHLEN)
	180	return backup_dir_buf;
	181
3696674b WD	182	rprintf(FERROR, "backup filename too long\n");
3696674b WD	183	return NULL;
378a074c AT	184	}
378a074c AT	185
21cddef2 WD	186	/* Has same return codes as make_backup(). */
	187	static inline int link_or_rename(const char from, const char to,
	188	BOOL prefer_rename, STRUCT_STAT *stp)
66203a98	189	{
d735fe20 WD	190	#ifdef SUPPORT_HARD_LINKS
d735fe20 WD	191	if (!prefer_rename) {
21cddef2	192	#ifndef CAN_HARDLINK_SYMLINK
d735fe20 WD	193	if (S_ISLNK(stp->st_mode))
d735fe20 WD	194	return 0; /* Use copy code. */
21cddef2	195	#endif
21cddef2	196	#ifndef CAN_HARDLINK_SPECIAL
d735fe20 WD	197	if (IS_SPECIAL(stp->st_mode) \|\| IS_DEVICE(stp->st_mode))
d735fe20 WD	198	return 0; /* Use copy code. */
21cddef2	199	#endif
3696674b WD	200	if (do_link(from, to) == 0) {
	201	if (DEBUG_GTE(BACKUP, 1))
	202	rprintf(FINFO, "make_backup: HLINK %s successful.\n", from);
5e2d51ee	203	return 2;
3696674b	204	}
5e2d51ee WD	205	/* We prefer to rename a regular file rather than copy it. */
5e2d51ee WD	206	if (!S_ISREG(stp->st_mode) \|\| errno == EEXIST \|\| errno == EISDIR)
d735fe20	207	return 0;
21cddef2 WD	208	}
21cddef2 WD	209	#endif
21cddef2 WD	210	if (do_rename(from, to) == 0) {
	211	if (stp->st_nlink > 1 && !S_ISDIR(stp->st_mode)) {
	212	/* If someone has hard-linked the file into the backup
	213	* dir, rename() might return success but do nothing! */
5e2d51ee	214	robust_unlink(from); /* Just in case... */
f1ca7c44	215	}
3696674b WD	216	if (DEBUG_GTE(BACKUP, 1))
3696674b WD	217	rprintf(FINFO, "make_backup: RENAME %s successful.\n", from);
21cddef2	218	return 1;
f1ca7c44	219	}
62c9e6b3	220	return 0;
de0e2250	221	}
66203a98	222
81d1ca06 WD	223	/* Hard-link, rename, or copy an item to the backup name. Returns 0 for
	224	* failure, 1 if item was moved, 2 if item was duplicated or hard linked
	225	* into backup area, or 3 if item doesn't exist or isn't a regular file. */
21cddef2	226	int make_backup(const char *fname, BOOL prefer_rename)
66203a98	227	{
13710874	228	stat_x sx;
66203a98	229	struct file_struct *file;
21cddef2	230	int save_preserve_xattrs;
81d1ca06	231	char *buf;
21cddef2 WD	232	int ret = 0;
21cddef2 WD	233
09ca0d15 WD	234	init_stat_x(&sx);
09ca0d15 WD	235	/* Return success if no file to keep. */
9439c0cb	236	if (x_lstat(fname, &sx.st, NULL) < 0)
81d1ca06 WD	237	return 3;
	238
	239	if (!(buf = get_backup_name(fname)))
	240	return 0;
66203a98	241
21cddef2 WD	242	/* Try a hard-link or a rename first. Using rename is not atomic, but
	243	* is more efficient than forcing a copy for larger files when no hard-
	244	* linking is possible. */
	245	if ((ret = link_or_rename(fname, buf, prefer_rename, &sx.st)) != 0)
	246	goto success;
d735fe20	247	if (errno == EEXIST \|\| errno == EISDIR) {
21cddef2 WD	248	STRUCT_STAT bakst;
	249	if (do_lstat(buf, &bakst) == 0) {
	250	int flags = get_del_for_flag(bakst.st_mode) \| DEL_FOR_BACKUP \| DEL_RECURSE;
	251	if (delete_item(buf, bakst.st_mode, flags) != 0)
	252	return 0;
	253	}
	254	if ((ret = link_or_rename(fname, buf, prefer_rename, &sx.st)) != 0)
	255	goto success;
82ad07c4	256	}
378a074c	257
21cddef2 WD	258	/* Fall back to making a copy. */
21cddef2 WD	259	if (!(file = make_file(fname, NULL, &sx.st, 0, NO_FILTERS)))
81d1ca06	260	return 3; /* the file could have disappeared */
21cddef2	261
1c3344a1 WD	262	#ifdef SUPPORT_ACLS
	263	if (preserve_acls && !S_ISLNK(file->mode)) {
	264	get_acl(fname, &sx);
cb197514	265	cache_tmp_acl(file, &sx);
1c3344a1 WD	266	free_acl(&sx);
	267	}
	268	#endif
16edf865 WD	269	#ifdef SUPPORT_XATTRS
	270	if (preserve_xattrs) {
	271	get_xattr(fname, &sx);
cb197514	272	cache_tmp_xattr(file, &sx);
16edf865 WD	273	free_xattr(&sx);
	274	}
	275	#endif
1c3344a1	276
378a074c	277	/* Check to see if this is a device file, or link */
b5c6a6ae WD	278	if ((am_root && preserve_devices && IS_DEVICE(file->mode))
b5c6a6ae WD	279	\|\| (preserve_specials && IS_SPECIAL(file->mode))) {
3696674b WD	280	if (do_mknod(buf, file->mode, sx.st.st_rdev) < 0)
	281	rsyserr(FERROR, errno, "mknod %s failed", full_fname(buf));
	282	else if (DEBUG_GTE(BACKUP, 1))
	283	rprintf(FINFO, "make_backup: DEVICE %s successful.\n", fname);
21cddef2	284	ret = 2;
47d6a60c	285	}
378a074c	286
4f5b0756	287	#ifdef SUPPORT_LINKS
21cddef2	288	if (!ret && preserve_links && S_ISLNK(file->mode)) {
82ad07c4	289	const char *sl = F_SYMLINK(file);
e6f3a33c	290	if (safe_symlinks && unsafe_symlink(sl, fname)) {
951e826b	291	if (INFO_GTE(SYMSAFE, 1)) {
7a3ce973 MM	292	rprintf(FINFO, "not backing up unsafe symlink \"%s\" -> \"%s\"\n",
7a3ce973 MM	293	fname, sl);
47d6a60c	294	}
21cddef2	295	ret = 2;
93e28fbd	296	} else {
3696674b WD	297	if (do_symlink(sl, buf) < 0)
	298	rsyserr(FERROR, errno, "link %s -> \"%s\"", full_fname(buf), sl);
	299	else if (DEBUG_GTE(BACKUP, 1))
	300	rprintf(FINFO, "make_backup: SYMLINK %s successful.\n", fname);
21cddef2	301	ret = 2;
47d6a60c	302	}
47d6a60c	303	}
378a074c	304	#endif
378a074c	305
21cddef2	306	if (!ret && !S_ISREG(file->mode)) {
e4669b81 WD	307	if (INFO_GTE(NONREG, 1))
e4669b81 WD	308	rprintf(FINFO, "make_bak: skipping non-regular file %s\n", fname);
82ad07c4	309	unmake_file(file);
cb197514 WD	310	#ifdef SUPPORT_ACLS
	311	uncache_tmp_acls();
	312	#endif
	313	#ifdef SUPPORT_XATTRS
	314	uncache_tmp_xattrs();
	315	#endif
81d1ca06	316	return 3;
47d6a60c	317	}
66203a98	318
21cddef2 WD	319	/* Copy to backup tree if a file. */
21cddef2 WD	320	if (!ret) {
3696674b	321	if (copy_file(fname, buf, -1, file->mode) < 0) {
d62bcc17	322	rsyserr(FERROR, errno, "keep_backup failed: %s -> \"%s\"",
45c49b52	323	full_fname(fname), buf);
21cddef2	324	unmake_file(file);
cb197514 WD	325	#ifdef SUPPORT_ACLS
	326	uncache_tmp_acls();
	327	#endif
	328	#ifdef SUPPORT_XATTRS
	329	uncache_tmp_xattrs();
	330	#endif
21cddef2	331	return 0;
47d6a60c	332	}
3696674b WD	333	if (DEBUG_GTE(BACKUP, 1))
3696674b WD	334	rprintf(FINFO, "make_backup: COPY %s successful.\n", fname);
21cddef2	335	ret = 2;
47d6a60c	336	}
21cddef2 WD	337
21cddef2 WD	338	save_preserve_xattrs = preserve_xattrs;
e9489cd6	339	preserve_xattrs = 0;
d3269612	340	set_file_attrs(buf, file, NULL, fname, ATTRS_ACCURATE_TIME);
e9489cd6	341	preserve_xattrs = save_preserve_xattrs;
21cddef2	342
82ad07c4	343	unmake_file(file);
cb197514 WD	344	#ifdef SUPPORT_ACLS
	345	uncache_tmp_acls();
	346	#endif
	347	#ifdef SUPPORT_XATTRS
	348	uncache_tmp_xattrs();
	349	#endif
378a074c	350
21cddef2	351	success:
3696674b WD	352	if (INFO_GTE(BACKUP, 1))
3696674b WD	353	rprintf(FINFO, "backed up %s to %s\n", fname, buf);
21cddef2	354	return ret;
66203a98	355	}