-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
+Alternately, if you don't want ACL support, configure it this way:
+
+ ./configure --enable-xattr-support
+
TODO:
- - This patch needs to be rewritten to more efficiently handle large xattrs.
+ - This patch needs to more efficiently handle large xattrs, especially when
+ they're unchanged.
+
+ - Extraneous xattr values need to be removed from files that are not being
+ recreated.
- We need to affect the itemized output to know when xattrs are being updated.
--- old/Makefile.in
+++ new/Makefile.in
-@@ -27,13 +27,13 @@ VERSION=@VERSION@
+@@ -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 \
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;
+@@ -30,6 +30,7 @@ extern int read_only;
+ extern int list_only;
extern int orig_umask;
extern int preserve_acls;
+extern int preserve_xattrs;
extern unsigned int file_struct_len;
/* === ACL structures === */
-@@ -743,6 +744,10 @@ void receive_acl(struct file_struct *fil
+@@ -741,6 +742,10 @@ void receive_acl(struct file_struct *fil
type = SMB_ACL_TYPE_ACCESS;
racl_list = &access_acl_list;
ndx_ptr = (char*)file + file_struct_len;
do {
char tag = read_byte(f);
int ndx;
-@@ -801,6 +806,10 @@ void cache_acl(struct file_struct *file,
+@@ -800,6 +805,10 @@ void cache_acl(struct file_struct *file,
racl = sxp->acc_acl;
racl_list = &access_acl_list;
ndx_ptr = (char*)file + file_struct_len;
do {
if (!racl)
ndx = -1;
-@@ -916,6 +925,10 @@ int set_acl(const char *fname, const str
+@@ -920,6 +929,10 @@ int set_acl(const char *fname, const str
type = SMB_ACL_TYPE_ACCESS;
ndx_ptr = (char*)file + file_struct_len;
if ((am_root && preserve_devices && IS_DEVICE(file->mode))
--- old/configure.in
+++ new/configure.in
-@@ -823,6 +823,30 @@ samba_cv_HAVE_ACL_GET_PERM_NP=yes,samba_
+@@ -856,6 +856,40 @@ samba_cv_HAVE_ACL_GET_PERM_NP=yes,samba_
AC_MSG_RESULT(no)
)
+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 Linux xattrs)
+ AC_DEFINE(HAVE_LINUX_XATTRS, 1, [True if you have Linux xattrs])
+ ;;
++ darwin*)
++ 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. Good luck)
++ AC_MSG_RESULT(Xattrs requested but not Linux or OS X. Good luck...)
+ ;;
+ esac
+ ;;
+ *)
+ 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])
extern int preserve_links;
extern int preserve_hard_links;
extern int preserve_devices;
-@@ -494,7 +495,7 @@ static struct file_struct *receive_file_
+@@ -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;
int xtra_len;
#endif
OFF_T file_length;
-@@ -606,10 +607,16 @@ static struct file_struct *receive_file_
+@@ -610,10 +611,16 @@ static struct file_struct *receive_file_
xtra_len = (S_ISDIR(mode) ? 2 : 1) * 4;
else
xtra_len = 0;
+ xtra_len
#endif
+ linkname_len + sum_len;
-@@ -618,7 +625,7 @@ static struct file_struct *receive_file_
+@@ -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;
bp += xtra_len;
#endif
-@@ -717,6 +724,10 @@ static struct file_struct *receive_file_
+@@ -723,6 +730,10 @@ static struct file_struct *receive_file_
if (preserve_acls)
receive_acl(file, f);
#endif
return file;
}
-@@ -987,6 +998,13 @@ static struct file_struct *send_file_nam
+@@ -974,7 +985,7 @@ static struct file_struct *send_file_nam
+ unsigned short flags)
+ {
+ struct file_struct *file;
+-#ifdef SUPPORT_ACLS
++#if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
+ statx sx;
+ #endif
+
+@@ -994,6 +1005,13 @@ static struct file_struct *send_file_nam
return NULL;
}
#endif
maybe_emit_filelist_progress(flist->count + flist_count_offset);
-@@ -999,11 +1017,19 @@ static struct file_struct *send_file_nam
+@@ -1006,11 +1024,19 @@ static struct file_struct *send_file_nam
if (preserve_acls)
send_acl(&sx, f);
#endif
}
--- old/lib/sysxattr.c
+++ new/lib/sysxattr.c
-@@ -0,0 +1,44 @@
+@@ -0,0 +1,136 @@
+/*
+ * 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)
+ return lgetxattr(path, name, value, size);
+}
+
-+int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size, int flags)
++ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size)
+{
-+ return lsetxattr(path, name, value, size, flags);
++ return fgetxattr(filedes, name, value, size);
++}
++
++int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size)
++{
++ return lsetxattr(path, name, value, size, 0);
++}
++
++int sys_lremovexattr(const char *path, const char *name)
++{
++ return lremovexattr(path, name);
+}
+
+ssize_t sys_llistxattr(const char *path, char *list, size_t size)
+ return llistxattr(path, list, size);
+}
+
++#elif HAVE_OSX_XATTRS
++
++ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size)
++{
++ return getxattr(path, name, value, size, 0, XATTR_NOFOLLOW);
++}
++
++ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size)
++{
++ return fgetxattr(filedes, name, value, size, 0, 0);
++}
++
++int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size)
++{
++ return setxattr(path, name, value, size, 0, XATTR_NOFOLLOW);
++}
++
++int sys_lremovexattr(const char *path, const char *name)
++{
++ return removexattr(path, name, XATTR_NOFOLLOW);
++}
++
++ssize_t sys_llistxattr(const char *path, char *list, size_t size)
++{
++ 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; ) {
++ 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);
++ off += keylen;
++ list[off++] = '\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 +1,13 @@
-+#if defined SUPPORT_XATTRS && defined HAVE_ATTR_XATTR_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
+
-+#if defined HAVE_LINUX_XATTRS
++/* Linux 2.4 does not define this as a distinct errno value: */
++#ifndef ENOATTR
++#define ENOATTR ENODATA
++#endif
+
+ssize_t sys_lgetxattr(const char *path, 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);
++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 sys_lremovexattr(const char *path, const char *name);
+ssize_t sys_llistxattr(const char *path, char *list, size_t size);
+
+#else
+
-+#endif /* No xattrs */
++/* No xattrs available */
++
++#endif
--- old/options.c
+++ new/options.c
@@ -48,6 +48,7 @@ int copy_links = 0;
int preserve_perms = 0;
int preserve_executability = 0;
int preserve_devices = 0;
-@@ -200,6 +201,7 @@ static void print_rsync_version(enum log
+@@ -201,6 +202,7 @@ static void print_rsync_version(enum log
char const *have_inplace = "no ";
char const *hardlinks = "no ";
char const *acls = "no ";
char const *links = "no ";
char const *ipv6 = "no ";
STRUCT_STAT *dumstat;
-@@ -219,7 +221,9 @@ static void print_rsync_version(enum log
+@@ -220,7 +222,9 @@ static void print_rsync_version(enum log
#ifdef SUPPORT_ACLS
acls = "";
#endif
#ifdef SUPPORT_LINKS
links = "";
#endif
-@@ -233,9 +237,9 @@ 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);
+@@ -236,8 +240,8 @@ static void print_rsync_version(enum log
+ rprintf(f, "Capabilities: %d-bit files, %ssocketpairs, %shard links, %ssymlinks,\n",
+ (int) (sizeof (OFF_T) * 8), got_socketpair, hardlinks, links);
+
+- rprintf(f, " batchfiles, %sinplace, %sIPv6, %sACLs,\n",
+- have_inplace, ipv6, acls);
++ rprintf(f, " batchfiles, %sinplace, %sIPv6, %sACLs, %sxattrs,\n",
++ have_inplace, ipv6, acls, xattrs);
/* Note that this field may not have type ino_t. It depends
* on the complicated interaction between largefile feature
-@@ -308,6 +312,9 @@ void usage(enum logcode F)
+@@ -289,7 +293,7 @@ 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," -a, --archive archive mode; same as -rlptgoD (no -H, -A)\n");
++ rprintf(F," -a, --archive archive mode; equals -rlptgoD (no -H,-A,-X)\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");
+@@ -314,6 +318,9 @@ void usage(enum logcode F)
#ifdef SUPPORT_ACLS
rprintf(F," -A, --acls preserve ACLs (implies --perms)\n");
#endif
+#ifdef SUPPORT_XATTRS
+ rprintf(F," -X, --xattrs preserve extended attributes (implies --perms)\n");
+#endif
- rprintf(F," --chmod=CHMOD change destination permissions\n");
rprintf(F," -o, --owner preserve owner (super-user only)\n");
rprintf(F," -g, --group preserve group\n");
-@@ -427,6 +434,9 @@ static struct poptOption long_options[]
+ rprintf(F," --devices preserve device files (super-user only)\n");
+@@ -436,6 +443,9 @@ 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 },
-@@ -1109,6 +1119,17 @@ int parse_arguments(int *argc, const cha
+@@ -1117,6 +1127,17 @@ 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()
-@@ -1560,6 +1581,10 @@ void server_options(char **args,int *arg
+@@ -1563,6 +1584,10 @@ void server_options(char **args,int *arg
if (preserve_acls)
argstr[x++] = 'A';
#endif
if (preserve_gid)
--- old/rsync.c
+++ new/rsync.c
-@@ -34,6 +34,7 @@ extern int verbose;
+@@ -33,6 +33,7 @@
+ extern int verbose;
extern int dry_run;
- extern int logfile_format_has_i;
extern int preserve_acls;
+extern int preserve_xattrs;
extern int preserve_perms;
extern int preserve_executability;
extern int preserve_times;
-@@ -223,6 +224,10 @@ int set_file_attrs(char *fname, struct f
- if (preserve_acls && set_acl(fname, file, sxp) == 0)
- updated = 1;
- #endif
+@@ -218,6 +219,10 @@ 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);
+
+#ifdef SUPPORT_XATTRS
+ if (preserve_xattrs && set_xattr(fname, file, sxp) == 0)
+ updated = 1;
+#endif
-
- #ifdef HAVE_CHMOD
- if ((sxp->st.st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) {
+ #ifdef SUPPORT_ACLS
+ /* It's OK to call set_acl() now, even for a dir, as the generator
+ * will enable owner-writability using chmod, if necessary.
--- old/rsync.h
+++ new/rsync.h
-@@ -495,6 +495,10 @@ struct idev {
+@@ -500,6 +500,10 @@ struct idev {
#define ACLS_NEED_MASK 1
#endif
-+#ifdef HAVE_LINUX_XATTRS
++#ifndef HAVE_NO_XATTRS
+#define SUPPORT_XATTRS 1
+#endif
+
#define GID_NONE ((gid_t)-1)
#define HL_CHECK_MASTER 0
-@@ -687,6 +691,9 @@ typedef struct {
+@@ -694,6 +698,9 @@ typedef struct {
struct rsync_acl *acc_acl; /* access ACL */
struct rsync_acl *def_acl; /* default ACL */
#endif
#define ACL_READY(sx) ((sx).acc_acl != NULL)
--- old/rsync.yo
+++ new/rsync.yo
-@@ -322,6 +322,7 @@ to the detailed description below for a
- -p, --perms preserve permissions
+@@ -301,7 +301,7 @@ to the detailed description below for a
+ -q, --quiet suppress non-error messages
+ --no-motd suppress daemon-mode MOTD (see caveat)
+ -c, --checksum skip based on checksum, not mod-time & size
+- -a, --archive archive mode; same as -rlptgoD (no -H, -A)
++ -a, --archive archive mode; equals -rlptgoD (no -H,-A,-X)
+ --no-OPTION turn off an implied OPTION (e.g. --no-D)
+ -r, --recursive recurse into directories
+ -R, --relative use relative path names
+@@ -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.]
- --chmod=CHMOD change destination permissions
-o, --owner preserve owner (super-user only)
-g, --group preserve group
-@@ -809,6 +810,11 @@ version makes it incompatible with sendi
+ --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.
transfer. The resulting value is treated as though it was the permissions
--- old/xattr.c
+++ new/xattr.c
-@@ -0,0 +1,358 @@
+@@ -0,0 +1,406 @@
+/*
+ * Extended Attribute support for rsync.
+ * Written by Jay Fenlason, vaguely based on the ACLs patch.
+#ifdef SUPPORT_XATTRS
+
+extern int dry_run;
++extern int am_root;
++extern int read_only;
++extern int list_only;
+extern unsigned int file_struct_len;
+
+#define RSYNC_XAL_INITIAL 5
+#define RSYNC_XAL_LIST_INITIAL 100
+
++#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 char *namebuf = NULL;
+
-+static size_t datumbuf_len = 0;
-+static char *datumbuf = NULL;
-+
+static item_list empty_xattr = EMPTY_ITEM_LIST;
+static item_list rsync_xal_l = EMPTY_ITEM_LIST;
+
+ 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;
+}
+
+static int rsync_xal_get(const char *fname, item_list *xalp)
+{
-+ ssize_t name_size;
-+ ssize_t datum_size;
-+ ssize_t left;
-+ char *name;
-+ size_t len;
-+ char *ptr;
++ ssize_t list_len, name_len, datum_len;
++ char *name, *ptr;
+
+ if (!namebuf) {
-+ namebuf_len = 100;
++ namebuf_len = 1024;
+ namebuf = new_array(char, namebuf_len);
-+ datumbuf_len = 100;
-+ datumbuf = new_array(char, datumbuf_len);
-+ if (!namebuf || !datumbuf)
++ if (!namebuf)
+ out_of_memory("rsync_xal_get");
+ }
+
-+ name_size = sys_llistxattr(fname, namebuf, namebuf_len);
-+ if (name_size > (ssize_t)namebuf_len) {
-+ name_size = -1;
++ /* 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 (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) {
++ list_len = sys_llistxattr(fname, NULL, 0);
++ if (list_len < 0) {
+ rsyserr(FERROR, errno, "%s: rsync_xal_get: llistxattr",
+ fname);
+ return -1;
+ }
-+ namebuf = realloc_array(namebuf, char, name_size + 1);
++ namebuf = realloc_array(namebuf, char, list_len + 1024);
+ if (!namebuf)
+ out_of_memory("rsync_xal_get");
-+ namebuf_len = name_size;
-+ name_size = sys_llistxattr(fname, namebuf, namebuf_len);
-+ if (name_size < 0) {
++ 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);
+ 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, datumbuf, datumbuf_len);
-+ if (datum_size > (ssize_t)datumbuf_len) {
-+ datum_size = -1;
-+ errno = ERANGE;
-+ }
-+ if (datum_size < 0) {
++
++ for (name = namebuf; list_len > 0 ; list_len -= name_len, name += name_len) {
++ rsync_xa *rxas;
++
++ name_len = strlen(name) + 1;
++
++#ifdef HAVE_LINUX_XATTRS
++ /* We don't send the system namespace. */
++ if (strncmp(name, SYSTEM_PREFIX, SPRE_LEN) == 0)
++ continue;
++#endif
++
++ datum_len = sys_lgetxattr(fname, name, NULL, 0);
++ if (datum_len < 0) {
+ if (errno == ENOTSUP)
+ return -1;
-+ if (errno == ERANGE) {
-+ datum_size = sys_lgetxattr(fname, name, NULL, 0);
-+ if (datum_size < 0) {
-+ rsyserr(FERROR, errno,
-+ "%s: rsync_xal_get: lgetxattr %s failed",
-+ fname, name);
-+ return -1;
-+ }
-+ datumbuf = realloc_array(datumbuf, char, datum_size + 1);
-+ if (!datumbuf)
-+ out_of_memory("rsync_xal_get");
-+ datumbuf_len = datum_size;
-+ datum_size = sys_lgetxattr(fname, name, datumbuf, datumbuf_len);
-+ if (datum_size < 0) {
++ rsyserr(FERROR, errno,
++ "%s: rsync_xal_get: lgetxattr %s failed",
++ fname, name);
++ return -1;
++ }
++ ptr = new_array(char, name_len + datum_len);
++ if (!ptr)
++ out_of_memory("rsync_xal_get");
++ if (datum_len) {
++ ssize_t len = sys_lgetxattr(fname, name, ptr, datum_len);
++ if (len != datum_len) {
++ if (len < 0) {
+ rsyserr(FERROR, errno,
-+ "%s: rsync_xal_get: re-lgetxattr of %s failed",
-+ name, fname);
-+ return -1;
++ "rsync_xal_get: lgetxattr(%s,%s)"
++ " failed", fname, name);
++ } else {
++ rprintf(FERROR,
++ "rsync_xal_get: lgetxattr(%s,%s)"
++ " returned %ld instead of %ld\n",
++ fname, name,
++ (long)len, (long)datum_len);
+ }
-+ } else {
-+ rsyserr(FERROR, errno,
-+ "%s: rsync_xal_get: lgetxattr %s failed",
-+ fname, name);
++ free(ptr);
+ return -1;
+ }
+ }
-+ ptr = new_array(char, len + datum_size);
-+ if (!ptr)
-+ out_of_memory("rsync_xal_get");
-+ memcpy(ptr, name, len);
-+ if (datum_size)
-+ memcpy(ptr + len, datumbuf, datum_size);
-+ rxas->name_len = len;
-+ rxas->name = ptr;
-+ rxas->datum_len = datum_size;
-+ rxas->datum = ptr + len;
++ rxas = EXPAND_ITEM_LIST(xalp, rsync_xa, RSYNC_XAL_INITIAL);
++ rxas->name = ptr + datum_len;
++ memcpy(rxas->name, name, name_len);
++ rxas->name_len = name_len;
++ rxas->datum_len = datum_len;
++ rxas->datum = ptr;
+ }
+ if (xalp->count > 1)
+ qsort(xalp->items, xalp->count, sizeof (rsync_xa), rsync_xal_compare_names);
+static void rsync_xal_store(item_list *xalp)
+{
+ item_list *new_lst = EXPAND_ITEM_LIST(&rsync_xal_l, item_list, RSYNC_XAL_LIST_INITIAL);
-+ EXPAND_ITEM_LIST(new_lst, item_list, xalp->count);
-+ memcpy(new_lst->items, xalp->items, xalp->count * sizeof (item_list));
++ /* 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;
+}
+ write_byte(f, 'X');
+ write_int(f, count);
+ for (rxa = sxp->xattr->items; count--; rxa++) {
++#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 (strncmp(rxa->name, RSYNC_PREFIX, RPRE_LEN) == 0) {
++ write_int(f, rxa->name_len - RPRE_LEN);
++ write_int(f, rxa->datum_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);
++ }
++#endif
+ write_buf(f, rxa->datum, rxa->datum_len);
+ }
-+ rsync_xal_store(sxp->xattr);
++ rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */
+ }
+ free_xattr(sxp);
+}
+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)
+ out_of_memory("receive_xattr"); /* overflow */
-+ rxa = EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, count);
-+ ptr = new_array(char, name_len + datum_len);
++#ifndef HAVE_LINUX_XATTRS
++ if (name_len + datum_len + RPRE_LEN < RPRE_LEN)
++ out_of_memory("receive_xattr"); /* overflow */
++#endif
++ ptr = new_array(char, name_len + datum_len + RPRE_LEN);
+ if (!ptr)
+ out_of_memory("receive_xattr");
-+ read_buf(f, ptr, name_len);
-+ read_buf(f, ptr + name_len, datum_len);
++ name = ptr + datum_len + RPRE_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 && strncmp(name, USER_PREFIX, UPRE_LEN) != 0) {
++ 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 (strncmp(name, USER_PREFIX, UPRE_LEN) == 0) {
++ name += UPRE_LEN;
++ name_len -= UPRE_LEN;
++ } else {
++ name -= RPRE_LEN;
++ memcpy(name, RSYNC_PREFIX, RPRE_LEN);
++ }
++#endif
++ rxa = EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, count);
++ rxa->name = name;
+ rxa->name_len = name_len;
++ rxa->datum = ptr;
+ rxa->datum_len = datum_len;
-+ rxa->name = ptr;
-+ rxa->datum = ptr + name_len;
+ }
-+ ndx = rsync_xal_l.count;
-+ rsync_xal_store(&temp_xattr);
++ 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) {
+
+ ndx = find_matching_xattr(sxp->xattr);
+ if (ndx == -1)
-+ rsync_xal_store(sxp->xattr);
++ rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */
+ free_xattr(sxp);
+
+ SIVAL(ndx_ptr, 0, ndx);
+ int ret = 0;
+
+ 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",
+ fname, rxas[i].name);
+ if (dry_run)
+ return 1; /* FIXME: --dry-run needs to compute this value */
+
++ if (read_only || list_only) {
++ errno = EROFS;
++ return -1;
++ }
++
+ ndx = IVAL(ndx_ptr, 0);
+ return rsync_xal_set(fname, lst + ndx); /* TODO: This needs to return 1 if no xattrs changed! */
+}
Matt McCutchen's Web Site / rsync / rsync-patches.git / blobdiff