X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/13710874ce907cd9405f83814cbebbe73f884e2e..e107b6b122812d88d531f3826e1a510abe916006:/xattrs.c

diff --git a/xattrs.c b/xattrs.c
index 50748b49..5e808297 100644
--- a/xattrs.c
+++ b/xattrs.c
@@ -64,6 +64,8 @@ extern int checksum_seed;
 #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;
@@ -130,7 +132,7 @@ static ssize_t get_xattr_names(const char *fname)
 	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;
@@ -146,7 +148,7 @@ static ssize_t get_xattr_names(const char *fname)
 			return list_len;
 	}
 
-	rsyserr(FERROR, errno,
+	rsyserr(FERROR_XFER, errno,
 		"get_xattr_names: llistxattr(\"%s\",%ld) failed",
 		fname, (long)namebuf_len);
 	return -1;
@@ -159,32 +161,35 @@ 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);
+	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);
@@ -225,7 +230,7 @@ static int rsync_xal_get(const char *fname, item_list *xalp)
 #endif
 
 		/* No rsync.%FOO attributes are copied w/o 2 -X options. */
-		if (preserve_xattrs < 2 && name_len > RPRE_LEN
+		if (am_sender && preserve_xattrs < 2 && name_len > RPRE_LEN
 		 && name[RPRE_LEN] == '%' && HAS_PREFIX(name, RSYNC_PREFIX))
 			continue;
 
@@ -518,12 +523,12 @@ void xattr_clear_locals(struct file_struct *file)
  * 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, got_xattr_data = 0;
 
 	if (F_XATTR(file) < 0) {
 		rprintf(FERROR, "recv_xattr_request: internal data error!\n");
@@ -561,7 +566,10 @@ void recv_xattr_request(struct file_struct *file, int f_in)
 		rxa->name = name;
 		free(old_datum);
 		read_buf(f_in, rxa->datum, rxa->datum_len);
+		got_xattr_data = 1;
 	}
+
+	return got_xattr_data;
 }
 
 /* ------------------------------------------------------------------------- */
@@ -717,7 +725,7 @@ static int rsync_xal_set(const char *fname, item_list *xalp,
 			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;
@@ -740,7 +748,7 @@ static int rsync_xal_set(const char *fname, item_list *xalp,
 		}
 
 		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;
@@ -760,6 +768,9 @@ static int rsync_xal_set(const char *fname, item_list *xalp,
 			    : !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)
@@ -767,7 +778,7 @@ static int rsync_xal_set(const char *fname, item_list *xalp,
 		}
 		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;
@@ -798,6 +809,32 @@ int set_xattr(const char *fname, const struct file_struct *file,
 	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;
@@ -829,7 +866,7 @@ int get_stat_xattr(const char *fname, int fd, STRUCT_STAT *fst, STRUCT_STAT *xst
 			xst->st_gid = 0;
 			return 0;
 		}
-		rsyserr(FERROR, errno, "failed to read xattr %s for %s",
+		rsyserr(FERROR_XFER, errno, "failed to read xattr %s for %s",
 			XSTAT_ATTR, full_fname(fname));
 		return -1;
 	}
@@ -850,7 +887,7 @@ int get_stat_xattr(const char *fname, int fd, STRUCT_STAT *fst, STRUCT_STAT *xst
 	return 0;
 }
 
-int set_stat_xattr(const char *fname, struct file_struct *file)
+int set_stat_xattr(const char *fname, struct file_struct *file, mode_t new_mode)
 {
 	STRUCT_STAT fst, xst;
 	dev_t rdev;
@@ -860,19 +897,19 @@ int set_stat_xattr(const char *fname, struct file_struct *file)
 		return 0;
 
 	if (read_only || list_only) {
-		rsyserr(FERROR, EROFS, "failed to write xattr %s for %s",
+		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, errno, "failed to re-stat %s",
+		rsyserr(FERROR_XFER, errno, "failed to re-stat %s",
 			full_fname(fname));
 		return -1;
 	}
 
 	fst.st_mode &= (_S_IFMT | CHMOD_BITS);
-	fmode = file->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);
@@ -892,7 +929,7 @@ int set_stat_xattr(const char *fname, struct file_struct *file)
 	 && 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, errno,
+			rsyserr(FERROR_XFER, errno,
 				"delete of stat xattr failed for %s",
 				full_fname(fname));
 			return -1;
@@ -910,7 +947,7 @@ int set_stat_xattr(const char *fname, struct file_struct *file)
 		if (sys_lsetxattr(fname, XSTAT_ATTR, buf, len) < 0) {
 			if (errno == EPERM && S_ISLNK(fst.st_mode))
 				return 0;
-			rsyserr(FERROR, errno,
+			rsyserr(FERROR_XFER, errno,
 				"failed to write xattr %s for %s",
 				XSTAT_ATTR, full_fname(fname));
 			return -1;