-Depends-On-Patch: acls.diff
+This patch adds basic support for extended attributes. It works, but there
+are some things that still needs to be improved (see TODO list below).
-After applying this patch, run these commands for a successful build:
+To use this patch, run these commands for a successful build:
+ patch -p1 <patches/acls.diff
+ patch -p1 <patches/xattrs.diff
./prepare-source
./configure --enable-acl-support --enable-xattr-support
make
-TODO:
+Alternately, if you don't want ACL support, configure it this way:
+
+ ./configure --enable-xattr-support
- - This patch needs to be rewritten to more efficiently handle large xattrs.
+TODO:
- - Extraneous xattr values need to be removed from files that are not being
- recreated.
+ - This patch needs to more efficiently handle large xattrs, especially when
+ they're unchanged.
- We need to affect the itemized output to know when xattrs are being updated.
@@ -28,13 +28,13 @@ VERSION=@VERSION@
HEADERS=byteorder.h config.h errcode.h proto.h rsync.h smb_acls.h lib/pool_alloc.h
- LIBOBJ=lib/wildmatch.o lib/compat.o lib/snprintf.o lib/mdfour.o \
+ LIBOBJ=lib/wildmatch.o lib/compat.o lib/snprintf.o lib/mdfour.o lib/md5.o \
- lib/permstring.o lib/pool_alloc.o lib/sysacls.o @LIBOBJS@
+ lib/permstring.o lib/pool_alloc.o lib/sysacls.o lib/sysxattr.o @LIBOBJS@
ZLIBOBJ=zlib/deflate.o zlib/inffast.o zlib/inflate.o zlib/inftrees.o \
zlib/trees.o zlib/zutil.o zlib/adler32.o zlib/compress.o zlib/crc32.o
- OBJS1=rsync.o generator.o receiver.o cleanup.o sender.o exclude.o util.o \
- main.o checksum.o match.o syscall.o log.o backup.o
- OBJS2=options.o flist.o io.o compat.o hlink.o token.o uidlist.o socket.o \
+ OBJS1=flist.o rsync.o generator.o receiver.o cleanup.o sender.o exclude.o \
+ util.o main.o checksum.o match.o syscall.o log.o backup.o
+ OBJS2=options.o io.o compat.o hlink.o token.o uidlist.o socket.o \
- fileio.o batch.o clientname.o chmod.o acls.o
+ fileio.o batch.o clientname.o chmod.o acls.o xattr.o
OBJS3=progress.o pipe.o
DAEMON_OBJ = params.o loadparm.o clientserver.o access.o connection.o authenticate.o
popt_OBJS=popt/findme.o popt/popt.o popt/poptconfig.o \
---- old/acls.c
-+++ new/acls.c
-@@ -29,6 +29,7 @@ extern int am_root;
- extern int dry_run;
- extern int orig_umask;
- extern int preserve_acls;
-+extern int preserve_xattrs;
- extern unsigned int file_struct_len;
-
- /* === ACL structures === */
-@@ -740,6 +741,10 @@ void receive_acl(struct file_struct *fil
- type = SMB_ACL_TYPE_ACCESS;
- racl_list = &access_acl_list;
- ndx_ptr = (char*)file + file_struct_len;
-+#ifdef SUPPORT_XATTRS
-+ if (preserve_xattrs)
-+ ndx_ptr += 4;
-+#endif
- do {
- char tag = read_byte(f);
- int ndx;
-@@ -799,6 +804,10 @@ void cache_acl(struct file_struct *file,
- racl = sxp->acc_acl;
- racl_list = &access_acl_list;
- ndx_ptr = (char*)file + file_struct_len;
-+#ifdef SUPPORT_XATTRS
-+ if (preserve_xattrs)
-+ ndx_ptr += 4;
-+#endif
- do {
- if (!racl)
- ndx = -1;
-@@ -914,6 +923,10 @@ int set_acl(const char *fname, const str
-
- type = SMB_ACL_TYPE_ACCESS;
- ndx_ptr = (char*)file + file_struct_len;
-+#ifdef SUPPORT_XATTRS
-+ if (preserve_xattrs)
-+ ndx_ptr += 4;
-+#endif
- do {
- acl_duo *duo_item;
- BOOL eq;
--- old/backup.c
+++ new/backup.c
-@@ -30,6 +30,7 @@ extern char *backup_dir;
-
+@@ -23,6 +23,7 @@
+ extern int verbose;
extern int am_root;
extern int preserve_acls;
+extern int preserve_xattrs;
extern int preserve_devices;
extern int preserve_specials;
extern int preserve_links;
-@@ -136,6 +137,9 @@ static int make_bak_dir(char *fullpath)
+@@ -134,6 +135,9 @@ static int make_bak_dir(char *fullpath)
#ifdef SUPPORT_ACLS
sx.acc_acl = sx.def_acl = NULL;
#endif
if (!(file = make_file(rel, NULL, NULL, 0, NO_FILTERS)))
continue;
#ifdef SUPPORT_ACLS
-@@ -144,6 +148,12 @@ static int make_bak_dir(char *fullpath)
- cache_acl(file, &sx);
+@@ -143,6 +147,12 @@ static int make_bak_dir(char *fullpath)
+ free_acl(&sx);
}
#endif
+#ifdef SUPPORT_XATTRS
set_file_attrs(fullpath, file, NULL, 0);
free(file);
}
-@@ -195,6 +205,9 @@ static int keep_backup(char *fname)
+@@ -194,6 +204,9 @@ static int keep_backup(const char *fname
#ifdef SUPPORT_ACLS
sx.acc_acl = sx.def_acl = NULL;
#endif
if (!(file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
return 1; /* the file could have disappeared */
-@@ -208,6 +221,12 @@ static int keep_backup(char *fname)
- cache_acl(file, &sx);
+@@ -210,6 +223,12 @@ static int keep_backup(const char *fname
+ free_acl(&sx);
}
#endif
+#ifdef SUPPORT_XATTRS
/* Check to see if this is a device file, or link */
if ((am_root && preserve_devices && IS_DEVICE(file->mode))
+--- old/compat.c
++++ new/compat.c
+@@ -65,6 +65,8 @@ void setup_protocol(int f_out,int f_in)
+ preserve_gid = ++file_extra_cnt;
+ if (preserve_acls && !am_sender)
+ preserve_acls = ++file_extra_cnt;
++ if (preserve_xattrs && !am_sender)
++ preserve_xattrs = ++file_extra_cnt;
+
+ if (remote_protocol == 0) {
+ if (!read_batch)
--- old/configure.in
+++ new/configure.in
-@@ -856,6 +856,35 @@ samba_cv_HAVE_ACL_GET_PERM_NP=yes,samba_
- AC_MSG_RESULT(no)
- )
+@@ -891,6 +891,40 @@ samba_cv_HAVE_ACL_GET_PERM_NP=yes,samba_
+ esac
+ fi
+AC_CHECK_HEADERS(attr/xattr.h)
+AC_CHECK_HEADERS(sys/xattr.h)
++AC_CHECK_HEADERS(sys/extattr.h)
+AC_MSG_CHECKING(whether to support extended attributes)
+AC_ARG_ENABLE(xattr-support,
+AC_HELP_STRING([--enable-xattr-support], [Include extended attribute support (default=no)]),
+ AC_MSG_RESULT(Using OS X xattrs)
+ AC_DEFINE(HAVE_OSX_XATTRS, 1, [True if you have Mac OS X xattrs])
+ ;;
++ freebsd*)
++ AC_MSG_RESULT(Using FreeBSD extattrs)
++ AC_DEFINE(HAVE_FREEBSD_XATTRS, 1, [True if you have FreeBSD xattrs])
++ ;;
+ *)
+ AC_MSG_RESULT(Xattrs requested but not Linux or OS X. Good luck...)
+ ;;
+ ;;
+ *)
+ AC_MSG_RESULT(no)
-+ AC_DEFINE(HAVE_NA_XATTRS, 1, [True if you don't have extended attributes])
++ AC_DEFINE(HAVE_NO_XATTRS, 1, [True if you don't have extended attributes])
+ esac ],
+ AC_MSG_RESULT(no)
-+ AC_DEFINE(HAVE_NO_XATTRL, 1, [True if you don't have extended attributes])
++ AC_DEFINE(HAVE_NO_XATTRS, 1, [True if you don't have extended attributes])
+)
+
AC_CONFIG_FILES([Makefile lib/dummy zlib/dummy popt/dummy shconfig])
--- old/flist.c
+++ new/flist.c
-@@ -41,6 +41,7 @@ extern int one_file_system;
+@@ -43,6 +43,7 @@ extern int one_file_system;
extern int copy_dirlinks;
extern int keep_dirlinks;
extern int preserve_acls;
extern int preserve_links;
extern int preserve_hard_links;
extern int preserve_devices;
-@@ -498,7 +499,7 @@ static struct file_struct *receive_file_
- char thisname[MAXPATHLEN];
- unsigned int l1 = 0, l2 = 0;
- int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
--#ifdef SUPPORT_ACLS
-+#if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
- int xtra_len;
- #endif
- OFF_T file_length;
-@@ -610,10 +611,16 @@ static struct file_struct *receive_file_
- xtra_len = (S_ISDIR(mode) ? 2 : 1) * 4;
- else
- xtra_len = 0;
-+#elif defined SUPPORT_XATTRS
-+ xtra_len = 0;
-+#endif
-+#ifdef SUPPORT_XATTRS
-+ if (preserve_xattrs)
-+ xtra_len += 4;
- #endif
-
- alloc_len = file_struct_len + dirname_len + basename_len
--#ifdef SUPPORT_ACLS
-+#if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
- + xtra_len
- #endif
- + linkname_len + sum_len;
-@@ -622,7 +629,7 @@ static struct file_struct *receive_file_
- file = (struct file_struct *)bp;
- memset(bp, 0, file_struct_len);
- bp += file_struct_len;
--#ifdef SUPPORT_ACLS
-+#if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
- bp += xtra_len;
- #endif
-
-@@ -723,6 +730,10 @@ static struct file_struct *receive_file_
- if (preserve_acls)
+@@ -888,6 +889,10 @@ static struct file_struct *recv_file_ent
+ if (preserve_acls && !S_ISLNK(mode))
receive_acl(file, f);
#endif
+#ifdef SUPPORT_XATTRS
+ receive_xattr(file, f );
+#endif
- return file;
- }
-@@ -974,7 +985,7 @@ static struct file_struct *send_file_nam
- unsigned short flags)
+ if (S_ISREG(mode) || S_ISLNK(mode))
+ stats.total_size += file_length;
+@@ -1160,7 +1165,7 @@ static struct file_struct *send_file_nam
+ int flags, int filter_flags)
{
struct file_struct *file;
-#ifdef SUPPORT_ACLS
statx sx;
#endif
-@@ -994,6 +1005,13 @@ static struct file_struct *send_file_nam
+@@ -1179,6 +1184,13 @@ static struct file_struct *send_file_nam
return NULL;
}
#endif
+#ifdef SUPPORT_XATTRS
-+ if (preserve_xattrs) {
++ if (preserve_xattrs && f >= 0) {
+ sx.xattr = NULL;
+ if (get_xattr(fname, &sx) < 0)
+ return NULL;
maybe_emit_filelist_progress(flist->count + flist_count_offset);
-@@ -1006,11 +1024,19 @@ static struct file_struct *send_file_nam
- if (preserve_acls)
- send_acl(&sx, f);
- #endif
-+#ifdef SUPPORT_XATTRS
-+ if (preserve_xattrs)
-+ send_xattr(&sx, f);
-+#endif
- } else {
- #ifdef SUPPORT_ACLS
- if (preserve_acls)
+@@ -1192,6 +1204,10 @@ static struct file_struct *send_file_nam
free_acl(&sx);
+ }
#endif
+#ifdef SUPPORT_XATTRS
+ if (preserve_xattrs)
-+ free_xattr(&sx);
++ send_xattr(&sx, f);
+#endif
}
return file;
}
--- old/lib/sysxattr.c
+++ new/lib/sysxattr.c
-@@ -0,0 +1,81 @@
+@@ -0,0 +1,135 @@
+/*
+ * Extended attribute support for rsync.
+ *
+#include "rsync.h"
+#include "sysxattr.h"
+
++#ifdef SUPPORT_XATTRS
++
+#if defined HAVE_LINUX_XATTRS
+
+ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size)
+
+ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size)
+{
-+ return lgetxattr(filedes, name, value, size);
++ return fgetxattr(filedes, name, value, size);
+}
+
-+int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size, int flags)
++int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size)
+{
-+ return lsetxattr(path, name, value, size, flags);
++ return lsetxattr(path, name, value, size, 0);
+}
+
+int sys_lremovexattr(const char *path, const char *name)
+
+ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size)
+{
-+ return getxattr(filedes, name, value, size, 0, XATTR_NOFOLLOW);
++ return fgetxattr(filedes, name, value, size, 0, 0);
+}
+
-+int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size, int flags)
++int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size)
+{
-+ return setxattr(path, name, value, size, 0, XATTR_NOFOLLOW | flags);
++ return setxattr(path, name, value, size, 0, XATTR_NOFOLLOW);
+}
+
+int sys_lremovexattr(const char *path, const char *name)
+ return listxattr(path, list, size, XATTR_NOFOLLOW);
+}
+
++#elif HAVE_FREEBSD_XATTRS
++
++ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size)
++{
++ return extattr_get_link(path, EXTATTR_NAMESPACE_USER, name, value, size);
++}
++
++ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size)
++{
++ return extattr_get_fd(filedes, EXTATTR_NAMESPACE_USER, name, value, size);
++}
++
++int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size)
++{
++ return extattr_set_link(path, EXTATTR_NAMESPACE_USER, name, value, size);
++}
++
++int sys_lremovexattr(const char *path, const char *name)
++{
++ return extattr_delete_link(path, EXTATTR_NAMESPACE_USER, name);
++}
++
++ssize_t sys_llistxattr(const char *path, char *list, size_t size)
++{
++ unsigned char keylen;
++ ssize_t off, len = extattr_list_link(path, EXTATTR_NAMESPACE_USER, list, size);
++
++ if (len <= 0 || (size_t)len > size)
++ return len;
++
++ /* FreeBSD puts a single-byte length before each string, with no '\0'
++ * terminator. We need to change this into a series of null-terminted
++ * strings. Since the size is the same, we can simply transform the
++ * output in place. */
++ for (off = 0; off < len; off += keylen + 1) {
++ keylen = ((unsigned char*)list)[off];
++ if (off + keylen >= len) {
++ /* Should be impossible, but kernel bugs happen! */
++ errno = EINVAL;
++ return -1;
++ }
++ memmove(list+off, list+off+1, keylen);
++ list[off+keylen] = '\0';
++ }
++
++ return len;
++}
++
+#else
+
-+#endif /* No xattrs */
++#error You need to create xattr compatibility functions.
++
++#endif
++
++#endif /* SUPPORT_XATTRS */
--- old/lib/sysxattr.h
+++ new/lib/sysxattr.h
@@ -0,0 +1,26 @@
+#ifdef SUPPORT_XATTRS
++
+#if defined HAVE_ATTR_XATTR_H
+#include <attr/xattr.h>
+#elif defined HAVE_SYS_XATTR_H
+#include <sys/xattr.h>
++#elif defined HAVE_SYS_EXTATTR_H
++#include <sys/extattr.h>
+#endif
-+#endif
-+
-+#if defined HAVE_LINUX_XATTRS || defined HAVE_OSX_XATTRS
+
+/* Linux 2.4 does not define this as a distinct errno value: */
+#ifndef ENOATTR
+
+ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size);
+ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size);
-+int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size, int flags);
++int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size);
+int sys_lremovexattr(const char *path, const char *name);
+ssize_t sys_llistxattr(const char *path, char *list, size_t size);
+
+#else
+
-+/* No xattrs */
++/* No xattrs available */
+
+#endif
--- old/options.c
+++ new/options.c
-@@ -48,6 +48,7 @@ int copy_links = 0;
+@@ -47,6 +47,7 @@ int copy_links = 0;
int preserve_links = 0;
int preserve_hard_links = 0;
int preserve_acls = 0;
#ifdef SUPPORT_LINKS
links = "";
#endif
-@@ -234,9 +238,9 @@ static void print_rsync_version(enum log
- rprintf(f, "Copyright (C) 1996-2006 by Andrew Tridgell, Wayne Davison, and others.\n");
- rprintf(f, "<http://rsync.samba.org/>\n");
- rprintf(f, "Capabilities: %d-bit files, %ssocketpairs, "
-- "%shard links, %sACLs, %ssymlinks, batchfiles,\n",
-+ "%shard links, %sACLs, %sxattrs, %ssymlinks, batchfiles,\n",
- (int) (sizeof (OFF_T) * 8),
-- got_socketpair, hardlinks, acls, links);
-+ got_socketpair, hardlinks, acls, xattrs, links);
+@@ -239,8 +243,8 @@ static void print_rsync_version(enum log
+ (int)(sizeof (int64) * 8));
+ rprintf(f, " %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n",
+ got_socketpair, hardlinks, links, ipv6, have_inplace);
+- rprintf(f, " %sappend, %sACLs\n",
+- have_inplace, acls);
++ rprintf(f, " %sappend, %sACLs, %sxattrs\n",
++ have_inplace, acls, xattrs);
- /* Note that this field may not have type ino_t. It depends
- * on the complicated interaction between largefile feature
-@@ -290,7 +294,7 @@ void usage(enum logcode F)
+ #ifdef MAINTAINER_MODE
+ rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
+@@ -286,7 +290,7 @@ void usage(enum logcode F)
rprintf(F," -q, --quiet suppress non-error messages\n");
rprintf(F," --no-motd suppress daemon-mode MOTD (see manpage caveat)\n");
rprintf(F," -c, --checksum skip based on checksum, not mod-time & size\n");
rprintf(F," --no-OPTION turn off an implied OPTION (e.g. --no-D)\n");
rprintf(F," -r, --recursive recurse into directories\n");
rprintf(F," -R, --relative use relative path names\n");
-@@ -315,6 +319,9 @@ void usage(enum logcode F)
+@@ -311,6 +315,9 @@ void usage(enum logcode F)
#ifdef SUPPORT_ACLS
rprintf(F," -A, --acls preserve ACLs (implies --perms)\n");
#endif
rprintf(F," -o, --owner preserve owner (super-user only)\n");
rprintf(F," -g, --group preserve group\n");
rprintf(F," --devices preserve device files (super-user only)\n");
-@@ -437,6 +444,9 @@ static struct poptOption long_options[]
+@@ -438,6 +445,9 @@ static struct poptOption long_options[]
{"acls", 'A', POPT_ARG_NONE, 0, 'A', 0, 0 },
{"no-acls", 0, POPT_ARG_VAL, &preserve_acls, 0, 0, 0 },
{"no-A", 0, POPT_ARG_VAL, &preserve_acls, 0, 0, 0 },
{"times", 't', POPT_ARG_VAL, &preserve_times, 1, 0, 0 },
{"no-times", 0, POPT_ARG_VAL, &preserve_times, 0, 0, 0 },
{"no-t", 0, POPT_ARG_VAL, &preserve_times, 0, 0, 0 },
-@@ -1118,6 +1128,17 @@ int parse_arguments(int *argc, const cha
+@@ -1126,6 +1136,17 @@ int parse_arguments(int *argc, const cha
return 0;
#endif
+ "extended attributes are not supported on this %s\n",
+ am_server ? "server" : "client");
+ return 0;
-+#endif /* SUPPORT_XATTRS */
++#endif
default:
/* A large opt value means that set_refuse_options()
-@@ -1564,6 +1585,10 @@ void server_options(char **args,int *arg
+@@ -1590,6 +1611,10 @@ void server_options(char **args,int *arg
if (preserve_acls)
argstr[x++] = 'A';
#endif
+ if (preserve_xattrs)
+ argstr[x++] = 'X';
+#endif
- if (preserve_uid)
- argstr[x++] = 'o';
- if (preserve_gid)
+ if (recurse)
+ argstr[x++] = 'r';
+ if (always_checksum)
--- old/rsync.c
+++ new/rsync.c
-@@ -33,6 +33,7 @@
+@@ -32,6 +32,7 @@
extern int verbose;
extern int dry_run;
extern int preserve_acls;
extern int preserve_perms;
extern int preserve_executability;
extern int preserve_times;
-@@ -219,6 +220,10 @@ int set_file_attrs(char *fname, struct f
+@@ -321,6 +322,10 @@ int set_file_attrs(char *fname, struct f
if (daemon_chmod_modes && !S_ISLNK(new_mode))
new_mode = tweak_mode(new_mode, daemon_chmod_modes);
* will enable owner-writability using chmod, if necessary.
--- old/rsync.h
+++ new/rsync.h
-@@ -501,6 +501,10 @@ struct idev {
+@@ -549,6 +549,10 @@ struct idev_node {
#define ACLS_NEED_MASK 1
#endif
-+#if defined HAVE_LINUX_XATTRS || defined HAVE_OSX_XATTRS
++#ifndef HAVE_NO_XATTRS
+#define SUPPORT_XATTRS 1
+#endif
+
#define GID_NONE ((gid_t)-1)
- #define HL_CHECK_MASTER 0
-@@ -695,6 +699,9 @@ typedef struct {
+ union file_extras {
+@@ -569,6 +573,7 @@ extern int file_extra_cnt;
+ extern int preserve_uid;
+ extern int preserve_gid;
+ extern int preserve_acls;
++extern int preserve_xattrs;
+
+ #define FILE_STRUCT_LEN (offsetof(struct file_struct, basename))
+ #define EXTRA_LEN (sizeof (union file_extras))
+@@ -602,6 +607,7 @@ extern int preserve_acls;
+ #define F_OWNER(f) REQ_EXTRA(f, preserve_uid)->unum
+ #define F_GROUP(f) REQ_EXTRA(f, preserve_gid)->unum
+ #define F_ACL(f) REQ_EXTRA(f, preserve_acls)->unum
++#define F_XATTR(f) REQ_EXTRA(f, preserve_xattrs)->unum
+
+ /* These items are per-entry optional and mutally exclusive: */
+ #define F_HL_GNUM(f) OPT_EXTRA(f, LEN64_BUMP(f))->num
+@@ -793,6 +799,9 @@ typedef struct {
struct rsync_acl *acc_acl; /* access ACL */
struct rsync_acl *def_acl; /* default ACL */
#endif
@@ -324,6 +324,7 @@ to the detailed description below for a
-E, --executability preserve executability
--chmod=CHMOD affect file and/or directory permissions
- -A, --acls preserve ACLs (implies -p) [non-standard]
-+ -X, --xattrs preserve extended attrs (implies -p) [n.s.]
+ -A, --acls preserve ACLs (implies -p)
++ -X, --xattrs preserve extended attrs (implies -p)
-o, --owner preserve owner (super-user only)
-g, --group preserve group
--devices preserve device files (super-user only)
-@@ -818,6 +819,11 @@ version makes it incompatible with sendi
- rsync unless you double the bf(--acls) option (e.g. bf(-AA)). This
- doubling is not needed when pulling files from an older rsync.
+@@ -831,6 +832,11 @@ dit(bf(-A, --acls)) This option causes r
+ ACLs to be the same as the source ACLs. This nonstandard option only
+ works if the remote rsync also supports it. bf(--acls) implies bf(--perms).
+dit(bf(-X, --xattrs)) This option causes rsync to update the remote
+extended attributes to be the same as the local ones. This will work
transfer. The resulting value is treated as though it was the permissions
--- old/xattr.c
+++ new/xattr.c
-@@ -0,0 +1,368 @@
+@@ -0,0 +1,459 @@
+/*
+ * Extended Attribute support for rsync.
+ * Written by Jay Fenlason, vaguely based on the ACLs patch.
+#ifdef SUPPORT_XATTRS
+
+extern int dry_run;
-+extern unsigned int file_struct_len;
++extern int am_root;
++extern int read_only;
++extern int list_only;
+
+#define RSYNC_XAL_INITIAL 5
+#define RSYNC_XAL_LIST_INITIAL 100
+
++#define HAS_PREFIX(str, prfx) (*(str) == *(prfx) \
++ && strncmp(str, prfx, sizeof (prfx) - 1) == 0)
++
++#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 *name;
-+ char *datum;
-+ size_t name_len;
-+ size_t datum_len;
++ char *datum, *name;
++ size_t datum_len, name_len;
+} rsync_xa;
+
+static size_t namebuf_len = 0;
+static item_list empty_xattr = EMPTY_ITEM_LIST;
+static item_list rsync_xal_l = EMPTY_ITEM_LIST;
+
-+#ifdef HAVE_OSX_XATTRS
-+static char unique_prefix[] = "user.0S%."; /* OSX */
-+static int upre_len = sizeof unique_prefix - 1;
-+#endif
-+
+/* ------------------------------------------------------------------------- */
+
+static void rsync_xal_free(item_list *xalp)
+ rsync_xa *rxas = xalp->items;
+
+ for (i = 0; i < xalp->count; i++) {
-+ free(rxas[i].name);
-+ /* free(rxas[i].value); */
++ free(rxas[i].datum);
++ /*free(rxas[i].name);*/
+ }
+ xalp->count = 0;
+}
+ return strcmp(xa1->name, xa2->name);
+}
+
-+static int rsync_xal_get(const char *fname, item_list *xalp)
++static ssize_t rsync_xal_list(const char *fname)
+{
-+ ssize_t name_size;
-+ ssize_t datum_size;
-+ ssize_t left;
-+ char *name;
-+ size_t len;
-+ char *ptr;
++ ssize_t list_len;
+
+ if (!namebuf) {
+ namebuf_len = 1024;
+ namebuf = new_array(char, namebuf_len);
+ if (!namebuf)
-+ out_of_memory("rsync_xal_get");
++ out_of_memory("rsync_xal_list");
+ }
+
+ /* The length returned includes all the '\0' terminators. */
-+ name_size = sys_llistxattr(fname, namebuf, namebuf_len);
-+ if (name_size > (ssize_t)namebuf_len) {
-+ name_size = -1;
++ list_len = sys_llistxattr(fname, namebuf, namebuf_len);
++ if (list_len > (ssize_t)namebuf_len) {
++ list_len = -1;
+ errno = ERANGE;
+ }
-+ if (name_size < 0) {
++ if (list_len < 0) {
+ if (errno == ENOTSUP)
+ return 0;
+ if (errno == ERANGE) {
-+ name_size = sys_llistxattr(fname, NULL, 0);
-+ if (name_size < 0) {
-+ rsyserr(FERROR, errno, "%s: rsync_xal_get: llistxattr",
++ list_len = sys_llistxattr(fname, NULL, 0);
++ if (list_len < 0) {
++ rsyserr(FERROR, errno,
++ "rsync_xal_list: llistxattr(\"%s\",0) failed",
+ fname);
+ return -1;
+ }
-+ namebuf = realloc_array(namebuf, char, name_size + 1024);
++ namebuf = realloc_array(namebuf, char, list_len + 1024);
+ if (!namebuf)
-+ out_of_memory("rsync_xal_get");
-+ namebuf_len = name_size + 1024;
-+ name_size = sys_llistxattr(fname, namebuf, namebuf_len);
-+ if (name_size < 0) {
++ out_of_memory("rsync_xal_list");
++ namebuf_len = list_len + 1024;
++ list_len = sys_llistxattr(fname, namebuf, namebuf_len);
++ if (list_len < 0) {
+ rsyserr(FERROR, errno,
-+ "%s: rsync_xal_get: re-llistxattr failed",
-+ fname);
++ "rsync_xal_list: llistxattr(\"%s\",%ld) failed",
++ fname, (long)namebuf_len);
+ return -1;
+ }
+ } else {
+ rsyserr(FERROR, errno,
-+ "%s: rsync_xal_get: llistxattr failed:",
-+ fname);
++ "rsync_xal_list: llistxattr(\"%s\",%ld) failed",
++ fname, (long)namebuf_len);
+ return -1;
+ }
+ }
-+ if (name_size == 0)
-+ return 0;
-+ for (left = name_size, name = namebuf; left > 0 ; left -= len, name += len) {
-+ rsync_xa *rxas = EXPAND_ITEM_LIST(xalp, rsync_xa, RSYNC_XAL_INITIAL);
-+
-+ len = strlen(name) + 1;
-+ datum_size = sys_lgetxattr(fname, name, NULL, 0);
-+ if (datum_size < 0) {
++
++ return list_len;
++}
++
++static int rsync_xal_get(const char *fname, item_list *xalp)
++{
++ ssize_t list_len, name_len, datum_len;
++ char *name, *ptr;
++
++ /* This puts the name list into the "namebuf" buffer. */
++ if ((list_len = rsync_xal_list(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 don't send the system namespace. */
++ if (HAS_PREFIX(name, SYSTEM_PREFIX))
++ continue;
++#endif
++
++ datum_len = sys_lgetxattr(fname, name, NULL, 0);
++ if (datum_len < 0) {
+ if (errno == ENOTSUP)
+ return -1;
+ rsyserr(FERROR, errno,
-+ "%s: rsync_xal_get: lgetxattr %s failed",
++ "rsync_xal_get: lgetxattr(\"%s\",\"%s\",0) failed",
+ fname, name);
+ return -1;
+ }
-+ ptr = new_array(char, len + datum_size);
++ ptr = new_array(char, name_len + datum_len);
+ if (!ptr)
+ out_of_memory("rsync_xal_get");
-+ memcpy(ptr, name, len);
-+ rxas->name_len = len;
-+ rxas->name = ptr;
-+ rxas->datum_len = datum_size;
-+ rxas->datum = ptr + len;
-+ if (datum_size) {
-+ ssize_t size = sys_lgetxattr(fname, name, rxas->datum, datum_size);
-+ if (size != datum_size) {
-+ if (size < 0) {
++ if (datum_len) {
++ ssize_t len = sys_lgetxattr(fname, name, ptr, datum_len);
++ if (len != datum_len) {
++ if (len < 0) {
+ rsyserr(FERROR, errno,
-+ "rsync_xal_get: lgetxattr(%s,%s)"
-+ " failed", fname, name);
++ "rsync_xal_get: lgetxattr(\"%s\",\"%s\",%ld)"
++ " failed", fname, name, (long)datum_len);
+ } else {
+ rprintf(FERROR,
-+ "rsync_xal_get: lgetxattr(%s,%s)"
-+ " returned %ld instead of %ld\n",
-+ fname, name,
-+ (long)size, (long)datum_size);
++ "rsync_xal_get: lgetxattr(\"%s\",\"%s\",%ld)"
++ " returned %ld\n", fname, name,
++ (long)datum_len, (long)len);
+ }
++ free(ptr);
+ return -1;
+ }
+ }
++ rxas = EXPAND_ITEM_LIST(xalp, rsync_xa, RSYNC_XAL_INITIAL);
++ rxas->name = ptr + datum_len;
++ rxas->datum = ptr;
++ rxas->name_len = name_len;
++ rxas->datum_len = datum_len;
++ memcpy(rxas->name, name, name_len);
+ }
+ if (xalp->count > 1)
+ qsort(xalp->items, xalp->count, sizeof (rsync_xa), rsync_xal_compare_names);
+ write_byte(f, 'X');
+ write_int(f, count);
+ for (rxa = sxp->xattr->items; count--; rxa++) {
-+#ifdef HAVE_OSX_XATTRS
-+ if (strncmp(rxa->name, "user.", 5) != 0
-+ && strncmp(rxa->name, "system.", 7) != 0) {
-+ write_int(f, rxa->name_len + upre_len);
++#ifdef HAVE_LINUX_XATTRS
++ write_int(f, rxa->name_len);
++ write_int(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_int(f, rxa->name_len - RPRE_LEN);
+ write_int(f, rxa->datum_len);
-+ write_buf(f, unique_prefix, upre_len);
-+ } else
-+#endif
-+ {
-+ write_int(f, rxa->name_len);
++ write_buf(f, rxa->name + RPRE_LEN, rxa->name_len - RPRE_LEN);
++ } else {
++ write_int(f, rxa->name_len + UPRE_LEN);
+ write_int(f, rxa->datum_len);
++ write_buf(f, USER_PREFIX, UPRE_LEN);
++ write_buf(f, rxa->name, rxa->name_len);
+ }
-+ write_buf(f, rxa->name, rxa->name_len);
++#endif
+ write_buf(f, rxa->datum, rxa->datum_len);
+ }
+ rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */
+void receive_xattr(struct file_struct *file, int f)
+{
+ static item_list temp_xattr = EMPTY_ITEM_LIST;
-+ int tag = read_byte(f);
-+ char *ndx_ptr = (char*)file + file_struct_len;
-+ int ndx;
++ int ndx, tag = read_byte(f);
+
+ if (tag == 'X') {
+ int i, count = read_int(f);
+ for (i = 0; i < count; i++) {
-+ char *ptr;
++ char *ptr, *name;
+ rsync_xa *rxa;
+ size_t name_len = read_int(f);
+ size_t datum_len = read_int(f);
-+ if (name_len + datum_len < name_len)
++#ifdef HAVE_LINUX_XATTRS
++ size_t extra_len = 0;
++#else
++ size_t extra_len = am_root ? RPRE_LEN : 0;
++ if (datum_len + extra_len < datum_len)
+ out_of_memory("receive_xattr"); /* overflow */
-+ rxa = EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, count);
-+ ptr = new_array(char, name_len + datum_len);
++#endif
++ if (name_len + datum_len + extra_len < name_len)
++ out_of_memory("receive_xattr"); /* overflow */
++ ptr = new_array(char, name_len + datum_len + extra_len);
+ if (!ptr)
+ out_of_memory("receive_xattr");
-+ read_buf(f, ptr, name_len);
-+ read_buf(f, ptr + name_len, datum_len);
-+ rxa->name_len = name_len;
-+ rxa->datum_len = datum_len;
-+ rxa->name = ptr;
-+ rxa->datum = ptr + name_len;
-+#ifdef HAVE_OSX_XATTRS
-+ if (strncmp(rxa->name, unique_prefix, upre_len) == 0) {
-+ rxa->name_len -= upre_len;
-+ memmove(rxa->name, rxa->name + upre_len, rxa->name_len);
++ name = ptr + datum_len + extra_len;
++ read_buf(f, name, name_len);
++ read_buf(f, ptr, datum_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, count);
++ 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 */
+ } else if (tag == 'x') {
+ ndx = read_int(f);
+ if (ndx < 0 || (size_t)ndx >= rsync_xal_l.count) {
-+ rprintf(FERROR, "%s: receive_xattr: xa index %d out of range\n",
-+ f_name(file, NULL), ndx);
++ rprintf(FERROR, "receive_xattr: xa index %d out of"
++ " range for %s\n", ndx, f_name(file, NULL));
+ exit_cleanup(RERR_STREAMIO);
+ }
+ } else {
-+ rprintf(FERROR,
-+ "%s: receive_xattr: unknown extended attribute type tag: %c\n",
-+ f_name(file, NULL), tag);
++ rprintf(FERROR, "receive_xattr: unknown extended attribute"
++ " type tag (%c) for %s\n", tag, f_name(file, NULL));
+ exit_cleanup(RERR_STREAMIO);
-+ ndx = 0; /* silence a compiler warning... */
+ }
+
-+ SIVAL(ndx_ptr, 0, ndx);
++ 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)
+{
-+ char *ndx_ptr = (char*)file + file_struct_len;
+ int ndx;
+
+ if (!sxp->xattr)
+ rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */
+ free_xattr(sxp);
+
-+ SIVAL(ndx_ptr, 0, ndx);
++ F_XATTR(file) = ndx;
+}
+
+static int rsync_xal_set(const char *fname, item_list *xalp)
+{
+ rsync_xa *rxas = xalp->items;
++ ssize_t list_len;
+ size_t i;
-+ int ret = 0;
++ char *name;
++ int name_len, ret = 0;
++
++ /* This puts the current name list into the "namebuf" buffer. */
++ if ((list_len = rsync_xal_list(fname)) < 0)
++ return -1;
+
+ for (i = 0; i < xalp->count; i++) {
-+ int status = sys_lsetxattr(fname, rxas[i].name, rxas[i].datum, rxas[i].datum_len, 0);
++ int status = sys_lsetxattr(fname, rxas[i].name, rxas[i].datum, rxas[i].datum_len);
+ if (status < 0) {
-+ rsyserr(FERROR, errno, "%s: rsync_xal_set: lsetxattr %s failed",
++ rsyserr(FERROR, errno,
++ "rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed",
+ fname, rxas[i].name);
+ ret = -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) {
++ int status = sys_lremovexattr(fname, name);
++ if (status < 0) {
++ rsyserr(FERROR, errno,
++ "rsync_xal_clear: lremovexattr(\"%s\",\"%s\") failed",
++ fname, name);
++ ret = -1;
++ }
++ }
++ }
++
+ return ret;
+}
+
+int set_xattr(const char *fname, const struct file_struct *file, UNUSED(statx *sxp))
+{
+ int ndx;
-+ char *ndx_ptr = (char*)file + file_struct_len;
+ item_list *lst = rsync_xal_l.items;
+
+ if (dry_run)
+ return 1; /* FIXME: --dry-run needs to compute this value */
+
-+ ndx = IVAL(ndx_ptr, 0);
++ if (read_only || list_only) {
++ errno = EROFS;
++ return -1;
++ }
++
++ ndx = F_XATTR(file);
+ return rsync_xal_set(fname, lst + ndx); /* TODO: This needs to return 1 if no xattrs changed! */
+}
+
git.samba.org / rsync-patches.git / blobdiff