* Copyright (C) 2006, 2007 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
+ * 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
* 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.,
- * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+ * with this program; if not, visit the http://fsf.org website.
*/
#include "rsync.h"
+#include "ifuncs.h"
#include "lib/sysxattrs.h"
#ifdef SUPPORT_XATTRS
extern int am_generator;
extern int read_only;
extern int list_only;
+extern int preserve_xattrs;
extern int checksum_seed;
#define RSYNC_XAL_INITIAL 5
#define SPRE_LEN ((int)sizeof SYSTEM_PREFIX - 1)
#ifdef HAVE_LINUX_XATTRS
-#define RPRE_LEN 0
+#define MIGHT_NEED_RPRE (am_root < 0)
+#define RSYNC_PREFIX USER_PREFIX "rsync."
#else
+#define MIGHT_NEED_RPRE am_root
#define RSYNC_PREFIX "rsync."
-#define RPRE_LEN ((int)sizeof RSYNC_PREFIX - 1)
#endif
+#define RPRE_LEN ((int)sizeof RSYNC_PREFIX - 1)
+
+#define XSTAT_ATTR RSYNC_PREFIX "%stat"
+#define XACC_ACL_ATTR RSYNC_PREFIX "%aacl"
+#define XDEF_ACL_ATTR RSYNC_PREFIX "%dacl"
typedef struct {
char *datum, *name;
size_t datum_len, name_len;
+ int num;
} rsync_xa;
static size_t namebuf_len = 0;
xalp->count = 0;
}
-void free_xattr(statx *sxp)
+void free_xattr(stat_x *sxp)
{
if (!sxp->xattr)
return;
if (errno == ERANGE) {
list_len = sys_llistxattr(fname, NULL, 0);
if (list_len < 0) {
- rsyserr(FERROR, errno,
+ rsyserr(FERROR_XFER, errno,
"get_xattr_names: llistxattr(\"%s\",0) failed",
fname);
return -1;
return list_len;
}
- rsyserr(FERROR, errno,
+ rsyserr(FERROR_XFER, errno,
"get_xattr_names: llistxattr(\"%s\",%ld) failed",
fname, (long)namebuf_len);
return -1;
int no_missing_error)
{
size_t datum_len = sys_lgetxattr(fname, name, NULL, 0);
+ size_t extra_len = *len_ptr;
char *ptr;
+ *len_ptr = datum_len;
+
if (datum_len == (size_t)-1) {
if (errno == ENOTSUP || no_missing_error)
return NULL;
- rsyserr(FERROR, errno,
+ rsyserr(FERROR_XFER, errno,
"get_xattr_data: lgetxattr(\"%s\",\"%s\",0) failed",
fname, name);
return NULL;
}
- if (datum_len + *len_ptr < datum_len /* checks for overflow */
- || !(ptr = new_array(char, datum_len + *len_ptr)))
+ if (!datum_len && !extra_len)
+ extra_len = 1; /* request non-zero amount of memory */
+ if (datum_len + extra_len < datum_len /* checks for overflow */
+ || !(ptr = new_array(char, datum_len + extra_len)))
out_of_memory("get_xattr_data");
- *len_ptr = datum_len;
-
if (datum_len) {
size_t len = sys_lgetxattr(fname, name, ptr, datum_len);
if (len != datum_len) {
if (len == (size_t)-1) {
- rsyserr(FERROR, errno,
+ rsyserr(FERROR_XFER, errno,
"get_xattr_data: lgetxattr(\"%s\",\"%s\",%ld)"
" failed", fname, name, (long)datum_len);
} else {
- rprintf(FERROR,
+ rprintf(FERROR_XFER,
"get_xattr_data: lgetxattr(\"%s\",\"%s\",%ld)"
" returned %ld\n", fname, name,
(long)datum_len, (long)len);
#ifdef HAVE_LINUX_XATTRS
int user_only = am_sender ? 0 : !am_root;
#endif
+ rsync_xa *rxa;
+ int count;
/* This puts the name list into the "namebuf" buffer. */
if ((list_len = get_xattr_names(fname)) < 0)
return -1;
for (name = namebuf; list_len > 0; name += name_len) {
- rsync_xa *rxas;
-
name_len = strlen(name) + 1;
list_len -= name_len;
continue;
#endif
+ /* No rsync.%FOO attributes are copied w/o 2 -X options. */
+ if (name_len > RPRE_LEN && name[RPRE_LEN] == '%'
+ && HAS_PREFIX(name, RSYNC_PREFIX)) {
+ if ((am_sender && preserve_xattrs < 2)
+ || (am_root < 0 && strcmp(name, XSTAT_ATTR) == 0))
+ continue;
+ }
+
datum_len = name_len; /* Pass extra size to get_xattr_data() */
if (!(ptr = get_xattr_data(fname, name, &datum_len, 0)))
return -1;
} else
name_offset = datum_len;
- rxas = EXPAND_ITEM_LIST(xalp, rsync_xa, RSYNC_XAL_INITIAL);
- rxas->name = ptr + name_offset;
- memcpy(rxas->name, name, name_len);
- rxas->datum = ptr;
- rxas->name_len = name_len;
- rxas->datum_len = datum_len;
+#ifdef HAVE_LINUX_XATTRS
+ if (am_root < 0 && name_len > RPRE_LEN && name[RPRE_LEN] != '%'
+ && HAS_PREFIX(name, RSYNC_PREFIX)) {
+ name += RPRE_LEN;
+ name_len -= RPRE_LEN;
+ }
+#endif
+
+ rxa = EXPAND_ITEM_LIST(xalp, rsync_xa, RSYNC_XAL_INITIAL);
+ rxa->name = ptr + name_offset;
+ memcpy(rxa->name, name, name_len);
+ rxa->datum = ptr;
+ rxa->name_len = name_len;
+ rxa->datum_len = datum_len;
}
- if (xalp->count > 1)
- qsort(xalp->items, xalp->count, sizeof (rsync_xa), rsync_xal_compare_names);
+ count = xalp->count;
+ rxa = xalp->items;
+ if (count > 1)
+ qsort(rxa, count, sizeof (rsync_xa), rsync_xal_compare_names);
+ for (rxa += count-1; count; count--, rxa--)
+ rxa->num = count;
return 0;
}
/* Read the xattr(s) for this filename. */
-int get_xattr(const char *fname, statx *sxp)
+int get_xattr(const char *fname, stat_x *sxp)
{
sxp->xattr = new(item_list);
*sxp->xattr = empty_xattr;
}
/* Send the make_xattr()-generated xattr list for this flist entry. */
-int send_xattr(statx *sxp, int f)
+int send_xattr(stat_x *sxp, int f)
{
int ndx = find_matching_xattr(sxp->xattr);
/* Return a flag indicating if we need to change a file's xattrs. If
* "find_all" is specified, also mark any abbreviated xattrs that we
* need so that send_xattr_request() can tell the sender about them. */
-int xattr_diff(struct file_struct *file, statx *sxp, int find_all)
+int xattr_diff(struct file_struct *file, stat_x *sxp, int find_all)
{
item_list *lst = rsync_xal_l.items;
rsync_xa *snd_rxa, *rec_rxa;
void send_xattr_request(const char *fname, struct file_struct *file, int f_out)
{
item_list *lst = rsync_xal_l.items;
- int j, cnt, prior_req = -1;
+ int cnt, prior_req = 0;
rsync_xa *rxa;
lst += F_XATTR(file);
- cnt = lst->count;
- for (rxa = lst->items, j = 0; j < cnt; rxa++, j++) {
+ for (rxa = lst->items, cnt = lst->count; cnt--; rxa++) {
if (rxa->datum_len <= MAX_FULL_DATUM)
continue;
switch (rxa->datum[0]) {
/* Flag that we handled this abbreviated item. */
rxa->datum[0] = XSTATE_DONE;
- write_varint(f_out, j - prior_req);
- prior_req = j;
+ write_varint(f_out, rxa->num - prior_req);
+ prior_req = rxa->num;
if (fname) {
size_t len = 0;
char *ptr;
/* Re-read the long datum. */
- if (!(ptr = get_xattr_data(fname, rxa->name, &len, 0)))
+ if (!(ptr = get_xattr_data(fname, rxa->name, &len, 0))) {
+ rprintf(FERROR_XFER, "failed to re-read xattr %s for %s\n", rxa->name, fname);
+ write_varint(f_out, 0);
continue;
+ }
write_varint(f_out, len); /* length might have changed! */
write_buf(f_out, ptr, len);
* any needed xattrs with a flag that lets us know they need to be sent to
* the receiver. When called by the receiver, reads the sent data and
* stores it in place of its checksum. */
-void recv_xattr_request(struct file_struct *file, int f_in)
+int recv_xattr_request(struct file_struct *file, int f_in)
{
item_list *lst = rsync_xal_l.items;
char *old_datum, *name;
rsync_xa *rxa;
- int rel_pos, cnt;
+ int rel_pos, cnt, num, got_xattr_data = 0;
if (F_XATTR(file) < 0) {
rprintf(FERROR, "recv_xattr_request: internal data error!\n");
cnt = lst->count;
rxa = lst->items;
- rxa -= 1;
+ num = 0;
while ((rel_pos = read_varint(f_in)) != 0) {
- rxa += rel_pos;
- cnt -= rel_pos;
- if (cnt < 0 || rxa->datum_len <= MAX_FULL_DATUM
- || rxa->datum[0] != XSTATE_ABBREV) {
- rprintf(FERROR, "recv_xattr_request: internal abbrev error!\n");
+ num += rel_pos;
+ while (cnt && rxa->num < num) {
+ rxa++;
+ cnt--;
+ }
+ if (!cnt || rxa->num != num) {
+ rprintf(FERROR, "[%s] could not find xattr #%d for %s\n",
+ who_am_i(), num, f_name(file, NULL));
+ exit_cleanup(RERR_STREAMIO);
+ }
+ if (rxa->datum_len <= MAX_FULL_DATUM || rxa->datum[0] != XSTATE_ABBREV) {
+ rprintf(FERROR, "[%s] internal abbrev error!\n", who_am_i());
exit_cleanup(RERR_STREAMIO);
}
rxa->name = name;
free(old_datum);
read_buf(f_in, rxa->datum, rxa->datum_len);
+ got_xattr_data = 1;
}
+
+ return got_xattr_data;
}
/* ------------------------------------------------------------------------- */
void receive_xattr(struct file_struct *file, int f)
{
static item_list temp_xattr = EMPTY_ITEM_LIST;
- int count;
+ int count, num;
int ndx = read_varint(f);
if (ndx < 0 || (size_t)ndx > rsync_xal_l.count) {
temp_xattr.count = 0;
}
- while (count--) {
+ for (num = 1; num <= count; num++) {
char *ptr, *name;
rsync_xa *rxa;
size_t name_len = read_varint(f);
size_t datum_len = read_varint(f);
size_t dget_len = datum_len > MAX_FULL_DATUM ? 1 + MAX_DIGEST_LEN : datum_len;
-#ifdef HAVE_LINUX_XATTRS
- size_t extra_len = 0;
-#else
- size_t extra_len = am_root ? RPRE_LEN : 0;
+ size_t extra_len = MIGHT_NEED_RPRE ? RPRE_LEN : 0;
if (dget_len + extra_len < dget_len)
out_of_memory("receive_xattr"); /* overflow */
-#endif
if (dget_len + extra_len + name_len < dget_len)
out_of_memory("receive_xattr"); /* overflow */
ptr = new_array(char, dget_len + extra_len + name_len);
}
#ifdef HAVE_LINUX_XATTRS
/* Non-root can only save the user namespace. */
- if (!am_root && !HAS_PREFIX(name, USER_PREFIX)) {
- free(ptr);
- continue;
+ if (am_root <= 0 && !HAS_PREFIX(name, USER_PREFIX)) {
+ if (!am_root) {
+ free(ptr);
+ continue;
+ }
+ name -= RPRE_LEN;
+ name_len += RPRE_LEN;
+ memcpy(name, RSYNC_PREFIX, RPRE_LEN);
}
#else
/* This OS only has a user namespace, so we either
continue;
}
#endif
+ /* No rsync.%FOO attributes are copied w/o 2 -X options. */
+ if (preserve_xattrs < 2 && name_len > RPRE_LEN
+ && name[RPRE_LEN] == '%' && HAS_PREFIX(name, RSYNC_PREFIX)) {
+ free(ptr);
+ continue;
+ }
rxa = EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, 1);
rxa->name = name;
rxa->datum = ptr;
rxa->name_len = name_len;
rxa->datum_len = datum_len;
+ rxa->num = num;
}
ndx = rsync_xal_l.count; /* pre-incremented count */
F_XATTR(file) = ndx;
}
-/* Turn the xattr data in statx into cached xattr data, setting the index
+/* Turn the xattr data in stat_x into cached xattr data, setting the index
* values in the file struct. */
-void cache_xattr(struct file_struct *file, statx *sxp)
+void cache_xattr(struct file_struct *file, stat_x *sxp)
{
int ndx;
}
static int rsync_xal_set(const char *fname, item_list *xalp,
- const char *fnamecmp, statx *sxp)
+ const char *fnamecmp, stat_x *sxp)
{
rsync_xa *rxas = xalp->items;
ssize_t list_len;
if (fname == fnamecmp)
; /* Value is already set when identical */
else if (sys_lsetxattr(fname, name, ptr, len) < 0) {
- rsyserr(FERROR, errno,
+ rsyserr(FERROR_XFER, errno,
"rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed",
fname, name);
ret = -1;
}
if (sys_lsetxattr(fname, name, rxas[i].datum, rxas[i].datum_len) < 0) {
- rsyserr(FERROR, errno,
+ rsyserr(FERROR_XFER, errno,
"rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed",
fname, name);
ret = -1;
: !HAS_PREFIX(name, USER_PREFIX))
continue;
#endif
+ if (am_root < 0 && name_len > RPRE_LEN
+ && name[RPRE_LEN] == '%' && strcmp(name, XSTAT_ATTR) == 0)
+ continue;
for (i = 0; i < xalp->count; i++) {
if (strcmp(name, rxas[i].name) == 0)
}
if (i == xalp->count) {
if (sys_lremovexattr(fname, name) < 0) {
- rsyserr(FERROR, errno,
+ rsyserr(FERROR_XFER, errno,
"rsync_xal_clear: lremovexattr(\"%s\",\"%s\") failed",
fname, name);
ret = -1;
/* Set extended attributes on indicated filename. */
int set_xattr(const char *fname, const struct file_struct *file,
- const char *fnamecmp, statx *sxp)
+ const char *fnamecmp, stat_x *sxp)
{
int ndx;
item_list *lst = rsync_xal_l.items;
return rsync_xal_set(fname, lst + ndx, fnamecmp, sxp);
}
+#ifdef SUPPORT_ACLS
+char *get_xattr_acl(const char *fname, int is_access_acl, size_t *len_p)
+{
+ const char *name = is_access_acl ? XACC_ACL_ATTR : XDEF_ACL_ATTR;
+ *len_p = 0; /* no extra data alloc needed from get_xattr_data() */
+ return get_xattr_data(fname, name, len_p, 1);
+}
+
+int set_xattr_acl(const char *fname, int is_access_acl, const char *buf, size_t buf_len)
+{
+ const char *name = is_access_acl ? XACC_ACL_ATTR : XDEF_ACL_ATTR;
+ if (sys_lsetxattr(fname, name, buf, buf_len) < 0) {
+ rsyserr(FERROR_XFER, errno,
+ "set_xattr_acl: lsetxattr(\"%s\",\"%s\") failed",
+ fname, name);
+ return -1;
+ }
+ return 0;
+}
+
+int del_def_xattr_acl(const char *fname)
+{
+ return sys_lremovexattr(fname, XDEF_ACL_ATTR);
+}
+#endif
+
+int get_stat_xattr(const char *fname, int fd, STRUCT_STAT *fst, STRUCT_STAT *xst)
+{
+ int mode, rdev_major, rdev_minor, uid, gid, len;
+ char buf[256];
+
+ if (am_root >= 0 || IS_DEVICE(fst->st_mode) || IS_SPECIAL(fst->st_mode))
+ return -1;
+
+ if (xst)
+ *xst = *fst;
+ else
+ xst = fst;
+ if (fname) {
+ fd = -1;
+ len = sys_lgetxattr(fname, XSTAT_ATTR, buf, sizeof buf - 1);
+ } else {
+ fname = "fd";
+ len = sys_fgetxattr(fd, XSTAT_ATTR, buf, sizeof buf - 1);
+ }
+ if (len >= (int)sizeof buf) {
+ len = -1;
+ errno = ERANGE;
+ }
+ if (len < 0) {
+ if (errno == ENOTSUP || errno == ENOATTR)
+ return -1;
+ if (errno == EPERM && S_ISLNK(fst->st_mode)) {
+ xst->st_uid = 0;
+ xst->st_gid = 0;
+ return 0;
+ }
+ rsyserr(FERROR_XFER, errno, "failed to read xattr %s for %s",
+ XSTAT_ATTR, full_fname(fname));
+ return -1;
+ }
+ buf[len] = '\0';
+
+ if (sscanf(buf, "%o %d,%d %d:%d",
+ &mode, &rdev_major, &rdev_minor, &uid, &gid) != 5) {
+ rprintf(FERROR, "Corrupt %s xattr attached to %s: \"%s\"\n",
+ XSTAT_ATTR, full_fname(fname), buf);
+ exit_cleanup(RERR_FILEIO);
+ }
+
+ xst->st_mode = from_wire_mode(mode);
+ xst->st_rdev = MAKEDEV(rdev_major, rdev_minor);
+ xst->st_uid = uid;
+ xst->st_gid = gid;
+
+ return 0;
+}
+
+int set_stat_xattr(const char *fname, struct file_struct *file, mode_t new_mode)
+{
+ STRUCT_STAT fst, xst;
+ dev_t rdev;
+ mode_t mode, fmode;
+
+ if (dry_run)
+ return 0;
+
+ if (read_only || list_only) {
+ rsyserr(FERROR_XFER, EROFS, "failed to write xattr %s for %s",
+ XSTAT_ATTR, full_fname(fname));
+ return -1;
+ }
+
+ if (x_lstat(fname, &fst, &xst) < 0) {
+ rsyserr(FERROR_XFER, errno, "failed to re-stat %s",
+ full_fname(fname));
+ return -1;
+ }
+
+ fst.st_mode &= (_S_IFMT | CHMOD_BITS);
+ fmode = new_mode & (_S_IFMT | CHMOD_BITS);
+
+ if (IS_DEVICE(fmode) || IS_SPECIAL(fmode)) {
+ uint32 *devp = F_RDEV_P(file);
+ rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
+ } else
+ rdev = 0;
+
+ /* Dump the special permissions and enable full owner access. */
+ mode = (fst.st_mode & _S_IFMT) | (fmode & ACCESSPERMS)
+ | (S_ISDIR(fst.st_mode) ? 0700 : 0600);
+ if (fst.st_mode != mode)
+ do_chmod(fname, mode);
+ if (!IS_DEVICE(fst.st_mode) && !IS_SPECIAL(fst.st_mode))
+ fst.st_rdev = 0; /* just in case */
+
+ if (mode == fmode && fst.st_rdev == rdev
+ && fst.st_uid == F_OWNER(file) && fst.st_gid == F_GROUP(file)) {
+ /* xst.st_mode will be 0 if there's no current stat xattr */
+ if (xst.st_mode && sys_lremovexattr(fname, XSTAT_ATTR) < 0) {
+ rsyserr(FERROR_XFER, errno,
+ "delete of stat xattr failed for %s",
+ full_fname(fname));
+ return -1;
+ }
+ return 0;
+ }
+
+ if (xst.st_mode != fmode || xst.st_rdev != rdev
+ || xst.st_uid != F_OWNER(file) || xst.st_gid != F_GROUP(file)) {
+ char buf[256];
+ int len = snprintf(buf, sizeof buf, "%o %u,%u %u:%u",
+ to_wire_mode(fmode),
+ (int)major(rdev), (int)minor(rdev),
+ F_OWNER(file), F_GROUP(file));
+ if (sys_lsetxattr(fname, XSTAT_ATTR, buf, len) < 0) {
+ if (errno == EPERM && S_ISLNK(fst.st_mode))
+ return 0;
+ rsyserr(FERROR_XFER, errno,
+ "failed to write xattr %s for %s",
+ XSTAT_ATTR, full_fname(fname));
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+int x_stat(const char *fname, STRUCT_STAT *fst, STRUCT_STAT *xst)
+{
+ int ret = do_stat(fname, fst);
+ if ((ret < 0 || get_stat_xattr(fname, -1, fst, xst) < 0) && xst)
+ xst->st_mode = 0;
+ return ret;
+}
+
+int x_lstat(const char *fname, STRUCT_STAT *fst, STRUCT_STAT *xst)
+{
+ int ret = do_lstat(fname, fst);
+ if ((ret < 0 || get_stat_xattr(fname, -1, fst, xst) < 0) && xst)
+ xst->st_mode = 0;
+ return ret;
+}
+
+int x_fstat(int fd, STRUCT_STAT *fst, STRUCT_STAT *xst)
+{
+ int ret = do_fstat(fd, fst);
+ if ((ret < 0 || get_stat_xattr(NULL, fd, fst, xst) < 0) && xst)
+ xst->st_mode = 0;
+ return ret;
+}
+
#endif /* SUPPORT_XATTRS */
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