X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/7ed6bc53b90ddfe262b9df467b147750a0e822e0..3f0211b63a6cdc4a2cecfd2a0dffeba172c86a47:/xattrs.c

diff --git a/xattrs.c b/xattrs.c
index e65f652a..21e30499 100644
--- a/xattrs.c
+++ b/xattrs.c
@@ -132,7 +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;
@@ -148,7 +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;
@@ -161,32 +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);
@@ -719,7 +722,7 @@ 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;
@@ -742,7 +745,7 @@ 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;
@@ -769,7 +772,7 @@ 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;
@@ -804,6 +807,7 @@ int set_xattr(const char *fname, const struct file_struct *file,
 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);
 }
 
@@ -811,7 +815,7 @@ int set_xattr_acl(const char *fname, int is_access_acl, const char *buf, size_t
 {
 	const char *name = is_access_acl ? XACC_ACL_ATTR : XDEF_ACL_ATTR;
 	if (sys_lsetxattr(fname, name, buf, buf_len) < 0) {
-		rsyserr(FERROR, errno,
+		rsyserr(FERROR_XFER, errno,
 			"set_xattr_acl: lsetxattr(\"%s\",\"%s\") failed",
 			fname, name);
 		return -1;
@@ -856,7 +860,7 @@ 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;
 	}
@@ -887,13 +891,13 @@ 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;
 	}
@@ -919,7 +923,7 @@ 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;
@@ -937,7 +941,7 @@ 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;