Use write_ndx() and read_ndx().
[rsync/rsync.git] / rsync.c
diff --git a/rsync.c b/rsync.c
index 178d9dd..9849180 100644 (file)
--- a/rsync.c
+++ b/rsync.c
@@ -42,13 +42,17 @@ extern int am_sender;
 extern int am_generator;
 extern int am_starting_up;
 extern int allow_8bit_chars;
+extern int protocol_version;
 extern int preserve_uid;
 extern int preserve_gid;
+extern int incremental;
 extern int inplace;
+extern int flist_eof;
 extern int keep_dirlinks;
 extern int make_backups;
 extern mode_t orig_umask;
 extern struct stats stats;
+extern struct file_list *cur_flist, *first_flist, *dir_flist;
 extern struct chmod_mode_struct *daemon_chmod_modes;
 
 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
@@ -91,26 +95,72 @@ void setup_iconv()
 
 /* This is used by sender.c with a valid f_out, and by receive.c with
  * f_out = -1. */
-int read_item_attrs(int f_in, int f_out, int ndx, uchar *type_ptr,
-                   char *buf, int *len_ptr)
+int read_ndx_and_attrs(int f_in, int f_out, int *iflag_ptr,
+                      uchar *type_ptr, char *buf, int *len_ptr)
 {
-       int len;
+       int len, iflags = 0;
+       struct file_list *flist;
        uchar fnamecmp_type = FNAMECMP_FNAME;
-       int iflags = protocol_version >= 29 ? read_shortint(f_in)
+       int verbose_save, ndx;
+
+  read_loop:
+       while (1) {
+               ndx = read_ndx(f_in);
+
+               if (ndx >= 0)
+                       break;
+               if (ndx == NDX_DONE)
+                       return ndx;
+               if (!incremental || am_sender)
+                       goto invalid_ndx;
+               if (ndx == NDX_FLIST_EOF) {
+                       flist_eof = 1;
+                       send_msg(MSG_FLIST_EOF, "", 0);
+                       continue;
+               }
+               ndx = NDX_FLIST_OFFSET - ndx;
+               if (ndx < 0 || ndx >= dir_flist->count) {
+                       ndx = NDX_FLIST_OFFSET - ndx;
+                       rprintf(FERROR,
+                               "Invalid dir index: %d (%d - %d)\n",
+                               ndx, NDX_FLIST_OFFSET,
+                               NDX_FLIST_OFFSET - dir_flist->count);
+                       exit_cleanup(RERR_PROTOCOL);
+               }
+               verbose_save = verbose;
+               verbose = 0; /* TODO allow verbose messages? */
+
+               /* Send everything read from f_in to msg_fd_out. */
+               send_msg_int(MSG_FLIST, ndx);
+               start_flist_forward(f_in);
+               flist = recv_file_list(f_in);
+               flist->parent_ndx = ndx;
+               stop_flist_forward();
+
+               verbose = verbose_save;
+       }
+
+       iflags = protocol_version >= 29 ? read_shortint(f_in)
                   : ITEM_TRANSFER | ITEM_MISSING_DATA;
 
-       /* Handle the new keep-alive (no-op) packet. */
-       if (ndx == the_file_list->count && iflags == ITEM_IS_NEW)
-               ;
-       else if (ndx < 0 || ndx >= the_file_list->count) {
-               rprintf(FERROR, "Invalid file index: %d (count=%d) [%s]\n",
-                       ndx, the_file_list->count, who_am_i());
-               exit_cleanup(RERR_PROTOCOL);
-       } else if (iflags == ITEM_IS_NEW) {
-               rprintf(FERROR, "Invalid itemized flag word: %x [%s]\n",
-                       iflags, who_am_i());
+       /* Honor the old-style keep-alive indicator. */
+       if (protocol_version < 30
+        && ndx == cur_flist->count && iflags == ITEM_IS_NEW) {
+               if (am_sender)
+                       maybe_send_keepalive();
+               goto read_loop;
+       }
+
+       if (!(flist = flist_for_ndx(ndx))) {
+         invalid_ndx:
+               rprintf(FERROR,
+                       "Invalid file index: %d (%d - %d) with iflags %x [%s]\n",
+                       ndx, first_flist->ndx_start + first_flist->ndx_start,
+                       first_flist->prev->ndx_start + first_flist->ndx_start
+                       + first_flist->prev->count - 1, iflags, who_am_i());
                exit_cleanup(RERR_PROTOCOL);
        }
+       cur_flist = flist;
 
        if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
                fnamecmp_type = read_byte(f_in);
@@ -126,7 +176,8 @@ int read_item_attrs(int f_in, int f_out, int ndx, uchar *type_ptr,
        *len_ptr = len;
 
        if (iflags & ITEM_TRANSFER) {
-               if (!S_ISREG(the_file_list->files[ndx]->mode)) {
+               int i = ndx - cur_flist->ndx_start;
+               if (!S_ISREG(cur_flist->files[i]->mode)) {
                        rprintf(FERROR,
                                "received request to transfer non-regular file: %d [%s]\n",
                                ndx, who_am_i());
@@ -137,7 +188,8 @@ int read_item_attrs(int f_in, int f_out, int ndx, uchar *type_ptr,
                                    fnamecmp_type, buf, len);
        }
 
-       return iflags;
+       *iflag_ptr = iflags;
+       return ndx;
 }
 
 /*
@@ -213,9 +265,9 @@ int set_file_attrs(char *fname, struct file_struct *file, STRUCT_STAT *st,
                        updated = 1;
        }
 
-       change_uid = am_root && preserve_uid && st->st_uid != file->uid;
-       change_gid = preserve_gid && file->gid != GID_NONE
-               && st->st_gid != file->gid;
+       change_uid = am_root && preserve_uid && st->st_uid != F_UID(file);
+       change_gid = preserve_gid && F_GID(file) != GID_NONE
+               && st->st_gid != F_GID(file);
 #if !defined HAVE_LCHOWN && !defined CHOWN_MODIFIES_SYMLINK
        if (S_ISLNK(st->st_mode))
                ;
@@ -227,18 +279,18 @@ int set_file_attrs(char *fname, struct file_struct *file, STRUCT_STAT *st,
                                rprintf(FINFO,
                                        "set uid of %s from %ld to %ld\n",
                                        fname,
-                                       (long)st->st_uid, (long)file->uid);
+                                       (long)st->st_uid, (long)F_UID(file));
                        }
                        if (change_gid) {
                                rprintf(FINFO,
                                        "set gid of %s from %ld to %ld\n",
                                        fname,
-                                       (long)st->st_gid, (long)file->gid);
+                                       (long)st->st_gid, (long)F_GID(file));
                        }
                }
                if (do_lchown(fname,
-                   change_uid ? file->uid : st->st_uid,
-                   change_gid ? file->gid : st->st_gid) != 0) {
+                   change_uid ? F_UID(file) : st->st_uid,
+                   change_gid ? F_GID(file) : st->st_gid) != 0) {
                        /* shouldn't have attempted to change uid or gid
                         * unless have the privilege */
                        rsyserr(FERROR, errno, "%s %s failed",
@@ -259,7 +311,7 @@ int set_file_attrs(char *fname, struct file_struct *file, STRUCT_STAT *st,
        if (daemon_chmod_modes && !S_ISLNK(new_mode))
                new_mode = tweak_mode(new_mode, daemon_chmod_modes);
 #ifdef HAVE_CHMOD
-       if ((st->st_mode & CHMOD_BITS) != (new_mode & CHMOD_BITS)) {
+       if (!BITS_EQUAL(st->st_mode, new_mode, CHMOD_BITS)) {
                int ret = do_chmod(fname, new_mode);
                if (ret < 0) {
                        rsyserr(FERROR, errno,
@@ -312,7 +364,7 @@ void finish_transfer(char *fname, char *fnametmp, char *partialptr,
                goto do_set_file_attrs;
        }
 
-       if (make_backups && overwriting_basis && !make_backup(fname))
+       if (make_backups > 0 && overwriting_basis && !make_backup(fname))
                return;
 
        /* Change permissions before putting the file into place. */
@@ -352,6 +404,25 @@ void finish_transfer(char *fname, char *fnametmp, char *partialptr,
        }
 }
 
+struct file_list *flist_for_ndx(int ndx)
+{
+       struct file_list *flist = cur_flist;
+
+       if (!flist)
+               return NULL;
+
+       while (ndx < flist->ndx_start) {
+               if (flist == first_flist)
+                       return NULL;
+               flist = flist->prev;
+       }
+       while (ndx >= flist->ndx_start + flist->count) {
+               if (!(flist = flist->next))
+                       return NULL;
+       }
+       return flist;
+}
+
 const char *who_am_i(void)
 {
        if (am_starting_up)