+/*
+ * Extended Attribute support for rsync.
+ * Written by Jay Fenlason, vaguely based on the ACLs patch.
+ *
+ * Copyright (C) 2004 Red Hat, Inc.
+ * 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.
+ *
+ * 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.,
+ * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "rsync.h"
+#include "lib/sysxattrs.h"
+
+#ifdef SUPPORT_XATTRS
+
+extern int dry_run;
+extern int am_root;
+extern int am_sender;
+extern int am_generator;
+extern int read_only;
+extern int list_only;
+extern int checksum_seed;
+
+#define RSYNC_XAL_INITIAL 5
+#define RSYNC_XAL_LIST_INITIAL 100
+
+#define MAX_FULL_DATUM 32
+
+#define HAS_PREFIX(str, prfx) (*(str) == *(prfx) \
+ && strncmp(str, prfx, sizeof (prfx) - 1) == 0)
+
+#define XATTR_ABBREV(x) ((size_t)((x).name - (x).datum) < (x).datum_len)
+
+#define XSTATE_ABBREV 0
+#define XSTATE_DONE 1
+#define XSTATE_TODO 2
+#define XSTATE_LOCAL 3
+
+#define USER_PREFIX "user."
+#define UPRE_LEN ((int)sizeof USER_PREFIX - 1)
+#define SYSTEM_PREFIX "system."
+#define SPRE_LEN ((int)sizeof SYSTEM_PREFIX - 1)
+
+#ifdef HAVE_LINUX_XATTRS
+#define RPRE_LEN 0
+#else
+#define RSYNC_PREFIX "rsync."
+#define RPRE_LEN ((int)sizeof RSYNC_PREFIX - 1)
+#endif
+
+typedef struct {
+ char *datum, *name;
+ size_t datum_len, name_len;
+} rsync_xa;
+
+static size_t namebuf_len = 0;
+static char *namebuf = NULL;
+
+static item_list empty_xattr = EMPTY_ITEM_LIST;
+static item_list rsync_xal_l = EMPTY_ITEM_LIST;
+
+/* ------------------------------------------------------------------------- */
+
+static void rsync_xal_free(item_list *xalp)
+{
+ size_t i;
+ rsync_xa *rxas = xalp->items;
+
+ for (i = 0; i < xalp->count; i++) {
+ free(rxas[i].datum);
+ /*free(rxas[i].name);*/
+ }
+ xalp->count = 0;
+}
+
+void free_xattr(statx *sxp)
+{
+ if (!sxp->xattr)
+ return;
+ rsync_xal_free(sxp->xattr);
+ free(sxp->xattr);
+ sxp->xattr = NULL;
+}
+
+static int rsync_xal_compare_names(const void *x1, const void *x2)
+{
+ const rsync_xa *xa1 = x1;
+ const rsync_xa *xa2 = x2;
+ return strcmp(xa1->name, xa2->name);
+}
+
+static ssize_t get_xattr_names(const char *fname)
+{
+ ssize_t list_len;
+
+ if (!namebuf) {
+ namebuf_len = 1024;
+ namebuf = new_array(char, namebuf_len);
+ if (!namebuf)
+ out_of_memory("get_xattr_names");
+ }
+
+ /* The length returned includes all the '\0' terminators. */
+ list_len = sys_llistxattr(fname, namebuf, namebuf_len);
+ if (list_len > (ssize_t)namebuf_len) {
+ list_len = -1;
+ errno = ERANGE;
+ }
+ if (list_len >= 0)
+ return list_len;
+ if (errno == ENOTSUP)
+ return 0;
+ if (errno == ERANGE) {
+ list_len = sys_llistxattr(fname, NULL, 0);
+ if (list_len < 0) {
+ rsyserr(FERROR, errno,
+ "get_xattr_names: llistxattr(\"%s\",0) failed",
+ fname);
+ return -1;
+ }
+ if (namebuf_len)
+ free(namebuf);
+ namebuf_len = list_len + 1024;
+ namebuf = new_array(char, namebuf_len);
+ if (!namebuf)
+ out_of_memory("get_xattr_names");
+ list_len = sys_llistxattr(fname, namebuf, namebuf_len);
+ if (list_len >= 0)
+ return list_len;
+ }
+
+ rsyserr(FERROR, errno,
+ "get_xattr_names: llistxattr(\"%s\",%ld) failed",
+ fname, (long)namebuf_len);
+ return -1;
+}
+
+/* On entry, the *len_ptr parameter contains the size of the extra space we
+ * should allocate when we create a buffer for the data. On exit, it contains
+ * the length of the datum. */
+static char *get_xattr_data(const char *fname, const char *name, size_t *len_ptr,
+ int no_missing_error)
+{
+ size_t datum_len = sys_lgetxattr(fname, name, NULL, 0);
+ char *ptr;
+
+ if (datum_len == (size_t)-1) {
+ if (errno == ENOTSUP || no_missing_error)
+ return NULL;
+ rsyserr(FERROR, 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)))
+ 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,
+ "get_xattr_data: lgetxattr(\"%s\",\"%s\",%ld)"
+ " failed", fname, name, (long)datum_len);
+ } else {
+ rprintf(FERROR,
+ "get_xattr_data: lgetxattr(\"%s\",\"%s\",%ld)"
+ " returned %ld\n", fname, name,
+ (long)datum_len, (long)len);
+ }
+ free(ptr);
+ return NULL;
+ }
+ }
+
+ return ptr;
+}
+
+static int rsync_xal_get(const char *fname, item_list *xalp)
+{
+ ssize_t list_len, name_len;
+ size_t datum_len, name_offset;
+ char *name, *ptr;
+#ifdef HAVE_LINUX_XATTRS
+ int user_only = am_sender ? 0 : !am_root;
+#endif
+
+ /* 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;
+
+#ifdef HAVE_LINUX_XATTRS
+ /* We always ignore the system namespace, and non-root
+ * ignores everything but the user namespace. */
+ if (user_only ? !HAS_PREFIX(name, USER_PREFIX)
+ : HAS_PREFIX(name, SYSTEM_PREFIX))
+ continue;
+#endif
+
+ datum_len = name_len; /* Pass extra size to get_xattr_data() */
+ if (!(ptr = get_xattr_data(fname, name, &datum_len, 0)))
+ return -1;
+
+ if (datum_len > MAX_FULL_DATUM) {
+ /* For large datums, we store a flag and a checksum. */
+ name_offset = 1 + MAX_DIGEST_LEN;
+ sum_init(checksum_seed);
+ sum_update(ptr, datum_len);
+ free(ptr);
+
+ if (!(ptr = new_array(char, name_offset + name_len)))
+ out_of_memory("rsync_xal_get");
+ *ptr = XSTATE_ABBREV;
+ sum_end(ptr + 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;
+ }
+ if (xalp->count > 1)
+ qsort(xalp->items, xalp->count, sizeof (rsync_xa), rsync_xal_compare_names);
+ return 0;
+}
+
+/* Read the xattr(s) for this filename. */
+int get_xattr(const char *fname, statx *sxp)
+{
+ sxp->xattr = new(item_list);
+ *sxp->xattr = empty_xattr;
+ if (rsync_xal_get(fname, sxp->xattr) < 0) {
+ free_xattr(sxp);
+ return -1;
+ }
+ return 0;
+}
+
+static int find_matching_xattr(item_list *xalp)
+{
+ size_t i, j;
+ item_list *lst = rsync_xal_l.items;
+
+ for (i = 0; i < rsync_xal_l.count; i++) {
+ rsync_xa *rxas1 = lst[i].items;
+ rsync_xa *rxas2 = xalp->items;
+
+ /* Wrong number of elements? */
+ if (lst[i].count != xalp->count)
+ continue;
+ /* any elements different? */
+ for (j = 0; j < xalp->count; j++) {
+ if (rxas1[j].name_len != rxas2[j].name_len
+ || rxas1[j].datum_len != rxas2[j].datum_len
+ || strcmp(rxas1[j].name, rxas2[j].name))
+ break;
+ if (rxas1[j].datum_len > MAX_FULL_DATUM) {
+ if (memcmp(rxas1[j].datum + 1,
+ rxas2[j].datum + 1,
+ MAX_DIGEST_LEN) != 0)
+ break;
+ } else {
+ if (memcmp(rxas1[j].datum, rxas2[j].datum,
+ rxas2[j].datum_len))
+ break;
+ }
+ }
+ /* no differences found. This is The One! */
+ if (j == xalp->count)
+ return i;
+ }
+
+ return -1;
+}
+
+/* Store *xalp on the end of rsync_xal_l */
+static void rsync_xal_store(item_list *xalp)
+{
+ item_list *new_lst = EXPAND_ITEM_LIST(&rsync_xal_l, item_list, RSYNC_XAL_LIST_INITIAL);
+ /* Since the following call starts a new list, we know it will hold the
+ * entire initial-count, not just enough space for one new item. */
+ *new_lst = empty_xattr;
+ (void)EXPAND_ITEM_LIST(new_lst, rsync_xa, xalp->count);
+ memcpy(new_lst->items, xalp->items, xalp->count * sizeof (rsync_xa));
+ new_lst->count = xalp->count;
+ xalp->count = 0;
+}
+
+/* Send the make_xattr()-generated xattr list for this flist entry. */
+int send_xattr(statx *sxp, int f)
+{
+ int ndx = find_matching_xattr(sxp->xattr);
+
+ /* Send 0 (-1 + 1) to indicate that literal xattr data follows. */
+ write_abbrevint(f, ndx + 1);
+
+ if (ndx < 0) {
+ rsync_xa *rxa;
+ int count = sxp->xattr->count;
+ write_abbrevint(f, count);
+ for (rxa = sxp->xattr->items; count--; rxa++) {
+#ifdef HAVE_LINUX_XATTRS
+ write_abbrevint(f, rxa->name_len);
+ write_abbrevint(f, rxa->datum_len);
+ write_buf(f, rxa->name, rxa->name_len);
+#else
+ /* We strip the rsync prefix from disguised namespaces
+ * and put everything else in the user namespace. */
+ if (HAS_PREFIX(rxa->name, RSYNC_PREFIX)
+ && rxa->name[RPRE_LEN] != '%') {
+ write_abbrevint(f, rxa->name_len - RPRE_LEN);
+ write_abbrevint(f, rxa->datum_len);
+ write_buf(f, rxa->name + RPRE_LEN, rxa->name_len - RPRE_LEN);
+ } else {
+ write_abbrevint(f, rxa->name_len + UPRE_LEN);
+ write_abbrevint(f, rxa->datum_len);
+ write_buf(f, USER_PREFIX, UPRE_LEN);
+ write_buf(f, rxa->name, rxa->name_len);
+ }
+#endif
+ if (rxa->datum_len > MAX_FULL_DATUM)
+ write_buf(f, rxa->datum + 1, MAX_DIGEST_LEN);
+ else
+ write_buf(f, rxa->datum, rxa->datum_len);
+ }
+ ndx = rsync_xal_l.count; /* pre-incremented count */
+ rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */
+ }
+
+ return ndx;
+}
+
+/* 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)
+{
+ item_list *lst = rsync_xal_l.items;
+ rsync_xa *snd_rxa, *rec_rxa;
+ int snd_cnt, rec_cnt;
+ int cmp, same, xattrs_equal = 1;
+
+ if (sxp && XATTR_READY(*sxp)) {
+ rec_rxa = sxp->xattr->items;
+ rec_cnt = sxp->xattr->count;
+ } else {
+ rec_rxa = NULL;
+ rec_cnt = 0;
+ }
+
+ if (F_XATTR(file) >= 0)
+ lst += F_XATTR(file);
+ else
+ lst = &empty_xattr;
+
+ snd_rxa = lst->items;
+ snd_cnt = lst->count;
+
+ /* If the count of the sender's xattrs is different from our
+ * (receiver's) xattrs, the lists are not the same. */
+ if (snd_cnt != rec_cnt) {
+ if (!find_all)
+ return 1;
+ xattrs_equal = 0;
+ }
+
+ while (snd_cnt) {
+ cmp = rec_cnt ? strcmp(snd_rxa->name, rec_rxa->name) : -1;
+ if (cmp > 0)
+ same = 0;
+ else if (snd_rxa->datum_len > MAX_FULL_DATUM) {
+ same = cmp == 0 && snd_rxa->datum_len == rec_rxa->datum_len
+ && memcmp(snd_rxa->datum + 1, rec_rxa->datum + 1,
+ MAX_DIGEST_LEN) == 0;
+ /* Flag unrequested items that we need. */
+ if (!same && find_all && snd_rxa->datum[0] == XSTATE_ABBREV)
+ snd_rxa->datum[0] = XSTATE_TODO;
+ } else {
+ same = cmp == 0 && snd_rxa->datum_len == rec_rxa->datum_len
+ && memcmp(snd_rxa->datum, rec_rxa->datum,
+ snd_rxa->datum_len) == 0;
+ }
+ if (!same) {
+ if (!find_all)
+ return 1;
+ xattrs_equal = 0;
+ }
+
+ if (cmp <= 0) {
+ snd_rxa++;
+ snd_cnt--;
+ }
+ if (cmp >= 0) {
+ rec_rxa++;
+ rec_cnt--;
+ }
+ }
+
+ if (rec_cnt)
+ xattrs_equal = 0;
+
+ return !xattrs_equal;
+}
+
+/* When called by the generator with a NULL fname, this tells the sender
+ * which abbreviated xattr values we need. When called by the sender
+ * (with a non-NULL fname), we send all the extra xattr data it needs. */
+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;
+ rsync_xa *rxa;
+
+ lst += F_XATTR(file);
+ cnt = lst->count;
+ for (rxa = lst->items, j = 0; j < cnt; rxa++, j++) {
+ if (rxa->datum_len <= MAX_FULL_DATUM)
+ continue;
+ switch (rxa->datum[0]) {
+ case XSTATE_LOCAL:
+ /* Items set locally will get cached by receiver. */
+ rxa->datum[0] = XSTATE_DONE;
+ continue;
+ case XSTATE_TODO:
+ break;
+ default:
+ continue;
+ }
+
+ /* Flag that we handled this abbreviated item. */
+ rxa->datum[0] = XSTATE_DONE;
+
+ write_abbrevint(f_out, j - prior_req);
+ prior_req = j;
+
+ if (fname) {
+ size_t len = 0;
+ char *ptr;
+
+ /* Re-read the long datum. */
+ if (!(ptr = get_xattr_data(fname, rxa->name, &len, 0)))
+ continue;
+
+ write_abbrevint(f_out, len); /* length might have changed! */
+ write_buf(f_out, ptr, len);
+ free(ptr);
+ }
+ }
+
+ write_byte(f_out, 0); /* end the list */
+}
+
+/* Any items set locally by the generator that the receiver doesn't
+ * get told about get changed back to XSTATE_ABBREV. */
+void xattr_clear_locals(struct file_struct *file)
+{
+ item_list *lst = rsync_xal_l.items;
+ rsync_xa *rxa;
+ int cnt;
+
+ if (F_XATTR(file) < 0)
+ return;
+
+ lst += F_XATTR(file);
+ cnt = lst->count;
+ for (rxa = lst->items; cnt--; rxa++) {
+ if (rxa->datum_len <= MAX_FULL_DATUM)
+ continue;
+ if (rxa->datum[0] == XSTATE_LOCAL)
+ rxa->datum[0] = XSTATE_ABBREV;
+ }
+}
+
+/* When called by the sender, read the request from the generator and mark
+ * 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)
+{
+ item_list *lst = rsync_xal_l.items;
+ char *old_datum, *name;
+ rsync_xa *rxa;
+ int rel_pos, cnt;
+
+ if (F_XATTR(file) < 0) {
+ rprintf(FERROR, "recv_xattr_request: internal data error!\n");
+ exit_cleanup(RERR_STREAMIO);
+ }
+ lst += F_XATTR(file);
+
+ cnt = lst->count;
+ rxa = lst->items;
+ rxa -= 1;
+ while ((rel_pos = read_abbrevint(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");
+ exit_cleanup(RERR_STREAMIO);
+ }
+
+ if (am_sender) {
+ rxa->datum[0] = XSTATE_TODO;
+ continue;
+ }
+
+ old_datum = rxa->datum;
+ rxa->datum_len = read_abbrevint(f_in);
+
+ if (rxa->name_len + rxa->datum_len < rxa->name_len)
+ out_of_memory("recv_xattr_request"); /* overflow */
+ rxa->datum = new_array(char, rxa->datum_len + rxa->name_len);
+ if (!rxa->datum)
+ out_of_memory("recv_xattr_request");
+ name = rxa->datum + rxa->datum_len;
+ memcpy(name, rxa->name, rxa->name_len);
+ rxa->name = name;
+ free(old_datum);
+ read_buf(f_in, rxa->datum, rxa->datum_len);
+ }
+}
+
+/* ------------------------------------------------------------------------- */
+
+/* receive and build the rsync_xattr_lists */
+void receive_xattr(struct file_struct *file, int f)
+{
+ static item_list temp_xattr = EMPTY_ITEM_LIST;
+ int count;
+ int ndx = read_abbrevint(f);
+
+ if (ndx < 0 || (size_t)ndx > rsync_xal_l.count) {
+ rprintf(FERROR, "receive_xattr: xa index %d out of"
+ " range for %s\n", ndx, f_name(file, NULL));
+ exit_cleanup(RERR_STREAMIO);
+ }
+
+ if (ndx != 0) {
+ F_XATTR(file) = ndx - 1;
+ return;
+ }
+
+ if ((count = read_abbrevint(f)) != 0) {
+ (void)EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, count);
+ temp_xattr.count = 0;
+ }
+
+ while (count--) {
+ char *ptr, *name;
+ rsync_xa *rxa;
+ size_t name_len = read_abbrevint(f);
+ size_t datum_len = read_abbrevint(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;
+ 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);
+ if (!ptr)
+ out_of_memory("receive_xattr");
+ name = ptr + dget_len + extra_len;
+ read_buf(f, name, name_len);
+ if (dget_len == datum_len)
+ read_buf(f, ptr, dget_len);
+ else {
+ *ptr = XSTATE_ABBREV;
+ read_buf(f, ptr + 1, MAX_DIGEST_LEN);
+ }
+#ifdef HAVE_LINUX_XATTRS
+ /* Non-root can only save the user namespace. */
+ if (!am_root && !HAS_PREFIX(name, USER_PREFIX)) {
+ free(ptr);
+ continue;
+ }
+#else
+ /* This OS only has a user namespace, so we either
+ * strip the user prefix, or we put a non-user
+ * namespace inside our rsync hierarchy. */
+ if (HAS_PREFIX(name, USER_PREFIX)) {
+ name += UPRE_LEN;
+ name_len -= UPRE_LEN;
+ } else if (am_root) {
+ name -= RPRE_LEN;
+ name_len += RPRE_LEN;
+ memcpy(name, RSYNC_PREFIX, RPRE_LEN);
+ } else {
+ free(ptr);
+ continue;
+ }
+#endif
+ 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;
+ }
+
+ ndx = rsync_xal_l.count; /* pre-incremented count */
+ rsync_xal_store(&temp_xattr); /* adds item to rsync_xal_l */
+
+ F_XATTR(file) = ndx;
+}
+
+/* Turn the xattr data in statx into cached xattr data, setting the index
+ * values in the file struct. */
+void cache_xattr(struct file_struct *file, statx *sxp)
+{
+ int ndx;
+
+ if (!sxp->xattr)
+ return;
+
+ ndx = find_matching_xattr(sxp->xattr);
+ if (ndx < 0)
+ rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */
+
+ F_XATTR(file) = ndx;
+}
+
+static int rsync_xal_set(const char *fname, item_list *xalp,
+ const char *fnamecmp, statx *sxp)
+{
+ rsync_xa *rxas = xalp->items;
+ ssize_t list_len;
+ size_t i, len;
+ char *name, *ptr, sum[MAX_DIGEST_LEN];
+ int name_len, ret = 0;
+
+ /* This puts the current name list into the "namebuf" buffer. */
+ if ((list_len = get_xattr_names(fname)) < 0)
+ return -1;
+
+ for (i = 0; i < xalp->count; i++) {
+ name = rxas[i].name;
+
+ if (XATTR_ABBREV(rxas[i])) {
+ /* See if the fnamecmp version is identical. */
+ len = name_len = rxas[i].name_len;
+ if ((ptr = get_xattr_data(fnamecmp, name, &len, 1)) == NULL) {
+ still_abbrev:
+ if (am_generator)
+ continue;
+ rprintf(FERROR, "Missing abbreviated xattr value, %s, for %s\n",
+ rxas[i].name, full_fname(fname));
+ ret = -1;
+ continue;
+ }
+ if (len != rxas[i].datum_len) {
+ free(ptr);
+ goto still_abbrev;
+ }
+
+ sum_init(checksum_seed);
+ sum_update(ptr, len);
+ sum_end(sum);
+ if (memcmp(sum, rxas[i].datum + 1, MAX_DIGEST_LEN) != 0) {
+ free(ptr);
+ goto still_abbrev;
+ }
+
+ if (fname == fnamecmp)
+ ; /* Value is already set when identical */
+ else if (sys_lsetxattr(fname, name, ptr, len) < 0) {
+ rsyserr(FERROR, errno,
+ "rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed",
+ fname, name);
+ ret = -1;
+ } else /* make sure caller sets mtime */
+ sxp->st.st_mtime = (time_t)-1;
+
+ if (am_generator) { /* generator items stay abbreviated */
+ if (rxas[i].datum[0] == XSTATE_ABBREV)
+ rxas[i].datum[0] = XSTATE_LOCAL;
+ free(ptr);
+ continue;
+ }
+
+ memcpy(ptr + len, name, name_len);
+ free(rxas[i].datum);
+
+ rxas[i].name = name = ptr + len;
+ rxas[i].datum = ptr;
+ continue;
+ }
+
+ if (sys_lsetxattr(fname, name, rxas[i].datum, rxas[i].datum_len) < 0) {
+ rsyserr(FERROR, errno,
+ "rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed",
+ fname, name);
+ ret = -1;
+ } else /* make sure caller sets mtime */
+ sxp->st.st_mtime = (time_t)-1;
+ }
+
+ /* Remove any extraneous names. */
+ for (name = namebuf; list_len > 0; name += name_len) {
+ name_len = strlen(name) + 1;
+ list_len -= name_len;
+
+#ifdef HAVE_LINUX_XATTRS
+ /* We always ignore the system namespace, and non-root
+ * ignores everything but the user namespace. */
+ if (am_root ? HAS_PREFIX(name, SYSTEM_PREFIX)
+ : !HAS_PREFIX(name, USER_PREFIX))
+ continue;
+#endif
+
+ for (i = 0; i < xalp->count; i++) {
+ if (strcmp(name, rxas[i].name) == 0)
+ break;
+ }
+ if (i == xalp->count) {
+ if (sys_lremovexattr(fname, name) < 0) {
+ rsyserr(FERROR, errno,
+ "rsync_xal_clear: lremovexattr(\"%s\",\"%s\") failed",
+ fname, name);
+ ret = -1;
+ } else /* make sure caller sets mtime */
+ sxp->st.st_mtime = (time_t)-1;
+ }
+ }
+
+ return ret;
+}
+
+/* Set extended attributes on indicated filename. */
+int set_xattr(const char *fname, const struct file_struct *file,
+ const char *fnamecmp, statx *sxp)
+{
+ int ndx;
+ item_list *lst = rsync_xal_l.items;
+
+ if (dry_run)
+ return 1; /* FIXME: --dry-run needs to compute this value */
+
+ if (read_only || list_only) {
+ errno = EROFS;
+ return -1;
+ }
+
+ ndx = F_XATTR(file);
+ return rsync_xal_set(fname, lst + ndx, fnamecmp, sxp);
+}
+
+#endif /* SUPPORT_XATTRS */
Matt McCutchen's Web Site / rsync / rsync.git / commitdiff