X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/4fe159a81d1f0c39aaa7f05dbb33b36d231e7c80..e1b3d5c4be46ee0b17a98aa48cb7cb152c4a008b:/rsync.c

diff --git a/rsync.c b/rsync.c
index 570dfef0..beb3d37f 100644
--- a/rsync.c
+++ b/rsync.c
@@ -19,17 +19,24 @@
 
 #include "rsync.h"
 
+extern int csum_length;
+
 extern int verbose;
 extern int am_server;
 extern int always_checksum;
 extern time_t starttime;
 
+extern int remote_version;
+
 extern char *backup_suffix;
+extern char *tmpdir;
 
+extern int whole_file;
 extern int block_size;
 extern int update_only;
 extern int make_backups;
 extern int preserve_links;
+extern int preserve_hard_links;
 extern int preserve_perms;
 extern int preserve_devices;
 extern int preserve_uid;
@@ -40,6 +47,11 @@ extern int ignore_times;
 extern int recurse;
 extern int delete_mode;
 extern int cvs_exclude;
+extern int am_root;
+extern int relative_paths;
+extern int io_timeout;
+extern int io_error;
+extern struct stats stats;
 
 /*
   free a sums struct
@@ -51,6 +63,75 @@ static void free_sums(struct sum_struct *s)
 }
 
 
+/*
+ * delete a file or directory. If force_delet is set then delete 
+ * recursively 
+ */
+static int delete_file(char *fname)
+{
+	DIR *d;
+	struct dirent *di;
+	char buf[MAXPATHLEN];
+	extern int force_delete;
+	STRUCT_STAT st;
+	int ret;
+	extern int recurse;
+
+	if (do_unlink(fname) == 0 || errno == ENOENT) return 0;
+
+#if SUPPORT_LINKS
+	ret = do_lstat(fname, &st);
+#else
+	ret = do_stat(fname, &st);
+#endif
+	if (ret) {
+		rprintf(FERROR,"stat(%s) : %s\n", fname, strerror(errno));
+		return -1;
+	}
+
+	if (!S_ISDIR(st.st_mode)) {
+		rprintf(FERROR,"unlink(%s) : %s\n", fname, strerror(errno));
+		return -1;
+	}
+
+	if (do_rmdir(fname) == 0 || errno == ENOENT) return 0;
+	if (!force_delete || !recurse || 
+	    (errno != ENOTEMPTY && errno != EEXIST)) {
+		rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno));
+		return -1;
+	}
+
+	/* now we do a recsursive delete on the directory ... */
+	d = opendir(fname);
+	if (!d) {
+		rprintf(FERROR,"opendir(%s): %s\n",
+			fname,strerror(errno));
+		return -1;
+	}
+
+	for (di=readdir(d); di; di=readdir(d)) {
+		char *dname = d_name(di);
+		if (strcmp(dname,".")==0 ||
+		    strcmp(dname,"..")==0)
+			continue;
+		slprintf(buf, sizeof(buf)-1, "%s/%s", fname, dname);
+		if (verbose > 0)
+			rprintf(FINFO,"deleting %s\n", buf);
+		if (delete_file(buf) != 0) {
+			closedir(d);
+			return -1;
+		}
+	}	
+
+	closedir(d);
+	
+	if (do_rmdir(fname) != 0) {
+		rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno));
+		return -1;
+	}
+
+	return 0;
+}
 
 /*
   send a sums struct down a fd
@@ -67,9 +148,8 @@ static void send_sums(struct sum_struct *s,int f_out)
   if (s)
     for (i=0;i<s->count;i++) {
       write_int(f_out,s->sums[i].sum1);
-      write_buf(f_out,s->sums[i].sum2,SUM_LENGTH);
+      write_buf(f_out,s->sums[i].sum2,csum_length);
     }
-  write_flush(f_out);
 }
 
 
@@ -78,14 +158,14 @@ static void send_sums(struct sum_struct *s,int f_out)
 
   generate approximately one checksum every n bytes
   */
-static struct sum_struct *generate_sums(char *buf,off_t len,int n)
+static struct sum_struct *generate_sums(struct map_struct *buf,OFF_T len,int n)
 {
   int i;
   struct sum_struct *s;
   int count;
   int block_len = n;
   int remainder = (len%block_len);
-  off_t offset = 0;
+  OFF_T offset = 0;
 
   count = (len+(block_len-1))/block_len;
 
@@ -103,7 +183,7 @@ static struct sum_struct *generate_sums(char *buf,off_t len,int n)
   }
 
   if (verbose > 3)
-    fprintf(stderr,"count=%d rem=%d n=%d flength=%d\n",
+    rprintf(FINFO,"count=%d rem=%d n=%d flength=%d\n",
 	    s->count,s->remainder,s->n,(int)s->flength);
 
   s->sums = (struct sum_buf *)malloc(sizeof(s->sums[0])*s->count);
@@ -121,7 +201,7 @@ static struct sum_struct *generate_sums(char *buf,off_t len,int n)
     s->sums[i].i = i;
 
     if (verbose > 3)
-      fprintf(stderr,"chunk[%d] offset=%d len=%d sum1=%08x\n",
+      rprintf(FINFO,"chunk[%d] offset=%d len=%d sum1=%08x\n",
 	      i,(int)s->sums[i].offset,s->sums[i].len,s->sums[i].sum1);
 
     len -= n1;
@@ -139,8 +219,7 @@ static struct sum_struct *receive_sums(int f)
 {
   struct sum_struct *s;
   int i;
-  off_t offset = 0;
-  int block_len;
+  OFF_T offset = 0;
 
   s = (struct sum_struct *)malloc(sizeof(*s));
   if (!s) out_of_memory("receive_sums");
@@ -151,11 +230,9 @@ static struct sum_struct *receive_sums(int f)
   s->sums = NULL;
 
   if (verbose > 3)
-    fprintf(stderr,"count=%d n=%d rem=%d\n",
+    rprintf(FINFO,"count=%d n=%d rem=%d\n",
 	    s->count,s->n,s->remainder);
 
-  block_len = s->n;
-
   if (s->count == 0) 
     return(s);
 
@@ -164,7 +241,7 @@ static struct sum_struct *receive_sums(int f)
 
   for (i=0;i<s->count;i++) {
     s->sums[i].sum1 = read_int(f);
-    read_buf(f,s->sums[i].sum2,SUM_LENGTH);
+    read_buf(f,s->sums[i].sum2,csum_length);
 
     s->sums[i].offset = offset;
     s->sums[i].i = i;
@@ -177,7 +254,7 @@ static struct sum_struct *receive_sums(int f)
     offset += s->sums[i].len;
 
     if (verbose > 3)
-      fprintf(stderr,"chunk[%d] len=%d offset=%d sum1=%08x\n",
+      rprintf(FINFO,"chunk[%d] len=%d offset=%d sum1=%08x\n",
 	      i,s->sums[i].len,(int)s->sums[i].offset,s->sums[i].sum1);
   }
 
@@ -187,130 +264,204 @@ static struct sum_struct *receive_sums(int f)
 }
 
 
-static void set_perms(char *fname,struct file_struct *file,struct stat *st,
-		      int report)
+static int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
+		     int report)
 {
   int updated = 0;
-  struct stat st2;
+  STRUCT_STAT st2;
+  extern int am_daemon;
 
-  if (dry_run) return;
+  if (dry_run) return 0;
 
   if (!st) {
-    if (stat(fname,&st2) != 0) {
-      fprintf(stderr,"stat %s : %s\n",fname,strerror(errno));
-      return;
+    if (link_stat(fname,&st2) != 0) {
+      rprintf(FERROR,"stat %s : %s\n",fname,strerror(errno));
+      return 0;
     }
     st = &st2;
   }
 
-  if (preserve_times && st->st_mtime != file->modtime) {
+  if (preserve_times && !S_ISLNK(st->st_mode) &&
+      st->st_mtime != file->modtime) {
     updated = 1;
     if (set_modtime(fname,file->modtime) != 0) {
-      fprintf(stderr,"failed to set times on %s : %s\n",
+      rprintf(FERROR,"failed to set times on %s : %s\n",
 	      fname,strerror(errno));
-      return;
+      return 0;
     }
   }
 
 #ifdef HAVE_CHMOD
-  if (preserve_perms && st->st_mode != file->mode) {
+  if (preserve_perms && !S_ISLNK(st->st_mode) &&
+      st->st_mode != file->mode) {
     updated = 1;
-    if (chmod(fname,file->mode) != 0) {
-      fprintf(stderr,"failed to set permissions on %s : %s\n",
+    if (do_chmod(fname,file->mode) != 0) {
+      rprintf(FERROR,"failed to set permissions on %s : %s\n",
 	      fname,strerror(errno));
-      return;
+      return 0;
     }
   }
 #endif
 
-  if ((preserve_uid && st->st_uid != file->uid) || 
-      (preserve_gid && st->st_gid != file->gid)) {
-    updated = 1;
-    if (chown(fname,
-	      preserve_uid?file->uid:-1,
-	      preserve_gid?file->gid:-1) != 0) {
-      if (verbose>1 || preserve_uid)
-	fprintf(stderr,"chown %s : %s\n",fname,strerror(errno));
-      return;
-    }
+  if ((am_root || !am_daemon) &&
+      ((am_root && preserve_uid && st->st_uid != file->uid) || 
+       (preserve_gid && st->st_gid != file->gid))) {
+	  if (do_lchown(fname,
+			(am_root&&preserve_uid)?file->uid:-1,
+			preserve_gid?file->gid:-1) != 0) {
+		  if (preserve_uid && st->st_uid != file->uid)
+			  updated = 1;
+		  if (verbose>1 || preserve_uid)
+			  rprintf(FERROR,"chown %s : %s\n",
+				  fname,strerror(errno));
+		  return updated;
+	  }
+	  updated = 1;
   }
     
   if (verbose > 1 && report) {
-    if (updated)
-      fprintf(am_server?stderr:stdout,"%s\n",fname);
-    else
-      fprintf(am_server?stderr:stdout,"%s is uptodate\n",fname);
+	  if (updated)
+		  rprintf(FINFO,"%s\n",fname);
+	  else
+		  rprintf(FINFO,"%s is uptodate\n",fname);
   }
+  return updated;
+}
+
+
+/* choose whether to skip a particular file */
+static int skip_file(char *fname,
+		     struct file_struct *file, STRUCT_STAT *st)
+{
+	if (st->st_size != file->length) {
+		return 0;
+	}
+	
+	/* if always checksum is set then we use the checksum instead 
+	   of the file time to determine whether to sync */
+	if (always_checksum && S_ISREG(st->st_mode)) {
+		char sum[MD4_SUM_LENGTH];
+		file_checksum(fname,sum,st->st_size);
+		return (memcmp(sum,file->sum,csum_length) == 0);
+	}
+
+	if (ignore_times) {
+		return 0;
+	}
+
+	return (st->st_mtime == file->modtime);
 }
 
 
+/* use a larger block size for really big files */
+int adapt_block_size(struct file_struct *file, int bsize)
+{
+	int ret;
+
+	if (bsize != BLOCK_SIZE) return bsize;
+
+	ret = file->length / (10000); /* rough heuristic */
+	ret = ret & ~15; /* multiple of 16 */
+	if (ret < bsize) ret = bsize;
+	if (ret > CHUNK_SIZE/2) ret = CHUNK_SIZE/2;
+	return ret;
+}
+
 void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
 {  
   int fd;
-  struct stat st;
-  char *buf;
+  STRUCT_STAT st;
+  struct map_struct *buf;
   struct sum_struct *s;
-  char sum[SUM_LENGTH];
   int statret;
+  struct file_struct *file = flist->files[i];
 
   if (verbose > 2)
-    fprintf(stderr,"recv_generator(%s)\n",fname);
+    rprintf(FINFO,"recv_generator(%s,%d)\n",fname,i);
+
+  statret = link_stat(fname,&st);
 
-  statret = lstat(fname,&st);
+  if (S_ISDIR(file->mode)) {
+    if (dry_run) return;
+    if (statret == 0 && !S_ISDIR(st.st_mode)) {
+      if (do_unlink(fname) != 0) {
+	rprintf(FERROR,"unlink %s : %s\n",fname,strerror(errno));
+	return;
+      }
+      statret = -1;
+    }
+    if (statret != 0 && do_mkdir(fname,file->mode) != 0 && errno != EEXIST) {
+	    if (!(relative_paths && errno==ENOENT && 
+		  create_directory_path(fname)==0 && 
+		  do_mkdir(fname,file->mode)==0)) {
+		    rprintf(FERROR,"mkdir %s : %s (2)\n",
+			    fname,strerror(errno));
+	    }
+    }
+    if (set_perms(fname,file,NULL,0) && verbose) 
+      rprintf(FINFO,"%s/\n",fname);
+    return;
+  }
 
+  if (preserve_links && S_ISLNK(file->mode)) {
 #if SUPPORT_LINKS
-  if (preserve_links && S_ISLNK(flist->files[i].mode)) {
     char lnk[MAXPATHLEN];
     int l;
     if (statret == 0) {
       l = readlink(fname,lnk,MAXPATHLEN-1);
       if (l > 0) {
 	lnk[l] = 0;
-	if (strcmp(lnk,flist->files[i].link) == 0) {
-	  if (verbose > 1) 
-	    fprintf(am_server?stderr:stdout,"%s is uptodate\n",fname);
+	if (strcmp(lnk,file->link) == 0) {
+	  set_perms(fname,file,&st,1);
 	  return;
 	}
       }
     }
-    if (!dry_run) unlink(fname);
-    if (!dry_run && symlink(flist->files[i].link,fname) != 0) {
-      fprintf(stderr,"link %s -> %s : %s\n",
-	      fname,flist->files[i].link,strerror(errno));
+    delete_file(fname);
+    if (do_symlink(file->link,fname) != 0) {
+      rprintf(FERROR,"link %s -> %s : %s\n",
+	      fname,file->link,strerror(errno));
     } else {
+      set_perms(fname,file,NULL,0);
       if (verbose) 
-	fprintf(am_server?stderr:stdout,"%s -> %s\n",fname,flist->files[i].link);
+	rprintf(FINFO,"%s -> %s\n",
+		fname,file->link);
     }
+#endif
     return;
   }
-#endif
 
 #ifdef HAVE_MKNOD
-  if (preserve_devices && IS_DEVICE(flist->files[i].mode)) {
+  if (am_root && preserve_devices && IS_DEVICE(file->mode)) {
     if (statret != 0 || 
-	st.st_mode != flist->files[i].mode ||
-	st.st_rdev != flist->files[i].dev) {	
-      if (!dry_run) unlink(fname);
+	st.st_mode != file->mode ||
+	st.st_rdev != file->rdev) {	
+      delete_file(fname);
       if (verbose > 2)
-	fprintf(stderr,"mknod(%s,0%o,0x%x)\n",
-		fname,(int)flist->files[i].mode,(int)flist->files[i].dev);
-      if (!dry_run && 
-	  mknod(fname,flist->files[i].mode,flist->files[i].dev) != 0) {
-	fprintf(stderr,"mknod %s : %s\n",fname,strerror(errno));
+	rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
+		fname,(int)file->mode,(int)file->rdev);
+      if (do_mknod(fname,file->mode,file->rdev) != 0) {
+	rprintf(FERROR,"mknod %s : %s\n",fname,strerror(errno));
       } else {
-	set_perms(fname,&flist->files[i],NULL,0);
+	set_perms(fname,file,NULL,0);
 	if (verbose)
-	  fprintf(am_server?stderr:stdout,"%s\n",fname);
+	  rprintf(FINFO,"%s\n",fname);
       }
     } else {
-      set_perms(fname,&flist->files[i],&st,1);
+      set_perms(fname,file,&st,1);
     }
     return;
   }
 #endif
 
-  if (!S_ISREG(flist->files[i].mode)) {
-    fprintf(stderr,"skipping non-regular file %s\n",fname);
+  if (preserve_hard_links && check_hard_link(file)) {
+    if (verbose > 1)
+      rprintf(FINFO,"%s is a hard link\n",f_name(file));
+    return;
+  }
+
+  if (!S_ISREG(file->mode)) {
+    rprintf(FINFO,"skipping non-regular file %s\n",fname);
     return;
   }
 
@@ -320,36 +471,41 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
       if (!dry_run) send_sums(NULL,f_out);
     } else {
       if (verbose > 1)
-	fprintf(stderr,"recv_generator failed to open %s\n",fname);
+	rprintf(FERROR,"recv_generator failed to open %s\n",fname);
     }
     return;
   }
 
   if (!S_ISREG(st.st_mode)) {
-    fprintf(stderr,"%s : not a regular file\n",fname);
+    if (delete_file(fname) != 0) {
+      return;
+    }
+
+    /* now pretend the file didn't exist */
+    write_int(f_out,i);
+    if (!dry_run) send_sums(NULL,f_out);    
     return;
   }
 
-  if (update_only && st.st_mtime >= flist->files[i].modtime) {
+  if (update_only && st.st_mtime > file->modtime) {
     if (verbose > 1)
-      fprintf(stderr,"%s is newer\n",fname);
+      rprintf(FINFO,"%s is newer\n",fname);
     return;
   }
 
-  if (always_checksum && S_ISREG(st.st_mode)) {
-    file_checksum(fname,sum,st.st_size);
+  if (skip_file(fname, file, &st)) {
+    set_perms(fname,file,&st,1);
+    return;
   }
 
-  if (st.st_size == flist->files[i].length &&
-      ((!ignore_times && st.st_mtime == flist->files[i].modtime) ||
-       (always_checksum && S_ISREG(st.st_mode) && 	  
-	memcmp(sum,flist->files[i].sum,SUM_LENGTH) == 0))) {
-    set_perms(fname,&flist->files[i],&st,1);
+  if (dry_run) {
+    write_int(f_out,i);
     return;
   }
 
-  if (dry_run) {
+  if (whole_file) {
     write_int(f_out,i);
+    send_sums(NULL,f_out);    
     return;
   }
 
@@ -357,7 +513,8 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
   fd = open(fname,O_RDONLY);
 
   if (fd == -1) {
-    fprintf(stderr,"failed to open %s : %s\n",fname,strerror(errno));
+    rprintf(FERROR,"failed to open %s : %s\n",fname,strerror(errno));
+    rprintf(FERROR,"skipping %s\n",fname);
     return;
   }
 
@@ -368,40 +525,51 @@ void recv_generator(char *fname,struct file_list *flist,int i,int f_out)
   }
 
   if (verbose > 3)
-    fprintf(stderr,"mapped %s of size %d\n",fname,(int)st.st_size);
+    rprintf(FINFO,"gen mapped %s of size %d\n",fname,(int)st.st_size);
 
-  s = generate_sums(buf,st.st_size,block_size);
+  s = generate_sums(buf,st.st_size,adapt_block_size(file, block_size));
+
+  if (verbose > 2)
+    rprintf(FINFO,"sending sums for %d\n",i);
 
   write_int(f_out,i);
   send_sums(s,f_out);
-  write_flush(f_out);
 
   close(fd);
-  unmap_file(buf,st.st_size);
+  if (buf) unmap_file(buf);
 
   free_sums(s);
 }
 
 
 
-static void receive_data(int f_in,char *buf,int fd,char *fname)
+static int receive_data(int f_in,struct map_struct *buf,int fd,char *fname)
 {
   int i,n,remainder,len,count;
-  off_t offset = 0;
-  off_t offset2;
+  OFF_T offset = 0;
+  OFF_T offset2;
+  char *data;
+  static char file_sum1[MD4_SUM_LENGTH];
+  static char file_sum2[MD4_SUM_LENGTH];
+  char *map=NULL;
 
   count = read_int(f_in);
   n = read_int(f_in);
   remainder = read_int(f_in);
 
-  for (i=read_int(f_in); i != 0; i=read_int(f_in)) {
+  sum_init();
+
+  for (i=recv_token(f_in,&data); i != 0; i=recv_token(f_in,&data)) {
     if (i > 0) {
       if (verbose > 3)
-	fprintf(stderr,"data recv %d at %d\n",i,(int)offset);
+	rprintf(FINFO,"data recv %d at %d\n",i,(int)offset);
+
+      stats.literal_data += i;
+      sum_update(data,i);
 
-      if (read_write(f_in,fd,i) != i) {
-	fprintf(stderr,"write failed on %s : %s\n",fname,strerror(errno));
-	exit(1);
+      if (fd != -1 && write_file(fd,data,i) != i) {
+	rprintf(FERROR,"write failed on %s : %s\n",fname,strerror(errno));
+	exit_cleanup(1);
       }
       offset += i;
     } else {
@@ -411,312 +579,599 @@ static void receive_data(int f_in,char *buf,int fd,char *fname)
       if (i == count-1 && remainder != 0)
 	len = remainder;
 
+      stats.matched_data += len;
+
       if (verbose > 3)
-	fprintf(stderr,"chunk[%d] of size %d at %d offset=%d\n",
+	rprintf(FINFO,"chunk[%d] of size %d at %d offset=%d\n",
 		i,len,(int)offset2,(int)offset);
 
-      if (write(fd,map_ptr(buf,offset2,len),len) != len) {
-	fprintf(stderr,"write failed on %s : %s\n",fname,strerror(errno));
-	exit(1);
+      map = map_ptr(buf,offset2,len);
+
+      see_token(map, len);
+      sum_update(map,len);
+
+      if (fd != -1 && write_file(fd,map,len) != len) {
+	rprintf(FERROR,"write failed on %s : %s\n",fname,strerror(errno));
+	exit_cleanup(1);
       }
       offset += len;
     }
   }
+
+  if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
+    rprintf(FERROR,"write failed on %s : %s\n",fname,strerror(errno));
+    exit_cleanup(1);
+  }
+
+  sum_end(file_sum1);
+
+  if (remote_version >= 14) {
+    read_buf(f_in,file_sum2,MD4_SUM_LENGTH);
+    if (verbose > 2)
+      rprintf(FINFO,"got file_sum\n");
+    if (fd != -1 && memcmp(file_sum1,file_sum2,MD4_SUM_LENGTH) != 0)
+      return 0;
+  }
+  return 1;
 }
 
 
 static void delete_one(struct file_struct *f)
 {
   if (!S_ISDIR(f->mode)) {
-    if (!dry_run && unlink(f->name) != 0) {
-      fprintf(stderr,"unlink %s : %s\n",f->name,strerror(errno));
+    if (do_unlink(f_name(f)) != 0) {
+      rprintf(FERROR,"unlink %s : %s\n",f_name(f),strerror(errno));
     } else if (verbose) {
-      fprintf(stderr,"deleting %s\n",f->name);
+      rprintf(FINFO,"deleting %s\n",f_name(f));
     }
   } else {    
-    if (!dry_run && rmdir(f->name) != 0) {
-      if (errno != ENOTEMPTY)
-	fprintf(stderr,"rmdir %s : %s\n",f->name,strerror(errno));
+    if (do_rmdir(f_name(f)) != 0) {
+      if (errno != ENOTEMPTY && errno != EEXIST)
+	rprintf(FERROR,"rmdir %s : %s\n",f_name(f),strerror(errno));
     } else if (verbose) {
-      fprintf(stderr,"deleting directory %s\n",f->name);      
+      rprintf(FINFO,"deleting directory %s\n",f_name(f));      
     }
   }
 }
 
 
-static void delete_files(struct file_list *flist)
-{
-  struct file_list *local_file_list;
-  char *dot=".";
-  int i;
 
-  if (cvs_exclude)
-    add_cvs_excludes();
+static struct delete_list {
+	dev_t dev;
+	ino_t inode;
+} *delete_list;
+static int dlist_len, dlist_alloc_len;
 
-  if (!(local_file_list = send_file_list(-1,recurse,1,&dot)))
-    return;
+static void add_delete_entry(struct file_struct *file)
+{
+	if (dlist_len == dlist_alloc_len) {
+		dlist_alloc_len += 1024;
+		delete_list = (struct delete_list *)Realloc(delete_list, sizeof(delete_list[0])*dlist_alloc_len);
+		if (!delete_list) out_of_memory("add_delete_entry");
+	}
 
-  for (i=local_file_list->count;i>=0;i--) {
-    if (!local_file_list->files[i].name) continue;
-    if (-1 == flist_find(flist,&local_file_list->files[i])) {
-      delete_one(&local_file_list->files[i]);
-    }    
-  }
-}
+	delete_list[dlist_len].dev = file->dev;
+	delete_list[dlist_len].inode = file->inode;
+	dlist_len++;
 
-static char *cleanup_fname = NULL;
+	if (verbose > 3)
+		rprintf(FINFO,"added %s to delete list\n", f_name(file));
+}
 
-void sig_int(void)
+/* yuck! This function wouldn't have been necessary if I had the sorting
+   algorithm right. Unfortunately fixing the sorting algorithm would introduce
+   a backward incompatibility as file list indexes are sent over the link.
+*/
+static int delete_already_done(struct file_list *flist,int j)
 {
-  if (cleanup_fname)
-    unlink(cleanup_fname);
-  exit(1);
-}
+	int i;
+	STRUCT_STAT st;
 
+	if (link_stat(f_name(flist->files[j]), &st)) return 1;
 
-int recv_files(int f_in,struct file_list *flist,char *local_name)
-{  
-  int fd1,fd2;
-  struct stat st;
-  char *fname;
-  char fnametmp[MAXPATHLEN];
-  char *buf;
-  int i;
+	for (i=0;i<dlist_len;i++) {
+		if (st.st_ino == delete_list[i].inode &&
+		    st.st_dev == delete_list[i].dev)
+			return 1;
+	}
 
-  if (verbose > 2) {
-    fprintf(stderr,"recv_files(%d) starting\n",flist->count);
-  }
+	return 0;
+}
 
-  if (recurse && delete_mode && !local_name && flist->count>0) {
-    delete_files(flist);
-  }
 
-  while (1) 
-    {
-      i = read_int(f_in);
-      if (i == -1) break;
+/* this deletes any files on the receiving side that are not present
+   on the sending side. For version 1.6.4 I have changed the behaviour
+   to match more closely what most people seem to expect of this option */
+static void delete_files(struct file_list *flist)
+{
+	struct file_list *local_file_list;
+	int i, j;
+	char *name;
 
-      fname = flist->files[i].name;
+	if (cvs_exclude)
+		add_cvs_excludes();
 
-      if (local_name)
-	fname = local_name;
+	if (io_error) {
+		rprintf(FINFO,"IO error encountered - skipping file deletion\n");
+		return;
+	}
 
-      if (dry_run) {
-	if (!am_server && verbose)
-	  printf("%s\n",fname);
-	continue;
-      }
+	for (j=0;j<flist->count;j++) {
+		if (!S_ISDIR(flist->files[j]->mode) || 
+		    !(flist->files[j]->flags & FLAG_DELETE)) continue;
+
+		if (remote_version < 19 &&
+		    delete_already_done(flist, j)) continue;
+
+		name = strdup(f_name(flist->files[j]));
+
+		if (!(local_file_list = send_file_list(-1,1,&name))) {
+			free(name);
+			continue;
+		}
+
+		if (verbose > 1)
+			rprintf(FINFO,"deleting in %s\n", name);
+
+		for (i=local_file_list->count-1;i>=0;i--) {
+			if (!local_file_list->files[i]->basename) continue;
+			if (remote_version < 19 &&
+			    S_ISDIR(local_file_list->files[i]->mode))
+				add_delete_entry(local_file_list->files[i]);
+			if (-1 == flist_find(flist,local_file_list->files[i])) {
+				delete_one(local_file_list->files[i]);
+			}    
+		}
+		flist_free(local_file_list);
+		free(name);
+	}
+}
 
-      if (verbose > 2)
-	fprintf(stderr,"recv_files(%s)\n",fname);
+static char *cleanup_fname;
 
-      /* open the file */  
-      fd1 = open(fname,O_RDONLY);
+void exit_cleanup(int code)
+{
+	io_flush();
+	if (cleanup_fname)
+		do_unlink(cleanup_fname);
+	signal(SIGUSR1, SIG_IGN);
+	if (code) {
+		kill_all(SIGUSR1);
+	}
+	exit(code);
+}
 
-      if (fd1 != -1 && fstat(fd1,&st) != 0) {
-	fprintf(stderr,"fstat %s : %s\n",fname,strerror(errno));
-	close(fd1);
-	return -1;
-      }
+void sig_int(void)
+{
+  exit_cleanup(1);
+}
 
-      if (fd1 != -1 && !S_ISREG(st.st_mode)) {
-	fprintf(stderr,"%s : not a regular file\n",fname);
-	close(fd1);
-	return -1;
-      }
 
-      if (fd1 != -1 && st.st_size > 0) {
-	buf = map_file(fd1,st.st_size);
-      } else {
-	buf = NULL;
-      }
 
-      if (verbose > 2)
-	fprintf(stderr,"mapped %s of size %d\n",fname,(int)st.st_size);
 
-      /* open tmp file */
-      sprintf(fnametmp,"%s.XXXXXX",fname);
-      if (NULL == mktemp(fnametmp)) {
-	fprintf(stderr,"mktemp %s failed\n",fnametmp);
-	return -1;
-      }
-      fd2 = open(fnametmp,O_WRONLY|O_CREAT,flist->files[i].mode);
-      if (fd2 == -1) {
-	fprintf(stderr,"open %s : %s\n",fnametmp,strerror(errno));
-	return -1;
-      }
-      
-      cleanup_fname = fnametmp;
+static int get_tmpname(char *fnametmp, char *fname)
+{
+	char *f;
+
+	/* open tmp file */
+	if (tmpdir) {
+		f = strrchr(fname,'/');
+		if (f == NULL) 
+			f = fname;
+		else 
+			f++;
+		if (strlen(tmpdir)+strlen(f)+10 > MAXPATHLEN) {
+			rprintf(FERROR,"filename too long\n");
+			return 0;
+		}
+		slprintf(fnametmp,MAXPATHLEN-1, "%s/.%s.XXXXXX",tmpdir,f);
+		return 1;
+	} 
+
+	f = strrchr(fname,'/');
+
+	if (strlen(fname)+9 > MAXPATHLEN) {
+		rprintf(FERROR,"filename too long\n");
+		return 0;
+	}
 
-      if (!am_server && verbose)
-	printf("%s\n",fname);
+	if (f) {
+		*f = 0;
+		slprintf(fnametmp,MAXPATHLEN-1,"%s/.%s.XXXXXX",
+			 fname,f+1);
+		*f = '/';
+	} else {
+		slprintf(fnametmp,MAXPATHLEN-1,".%s.XXXXXX",fname);
+	}
 
-      /* recv file data */
-      receive_data(f_in,buf,fd2,fname);
+	return 1;
+}
 
-      if (fd1 != -1) {
-	unmap_file(buf,st.st_size);
-	close(fd1);
-      }
-      close(fd2);
+int recv_files(int f_in,struct file_list *flist,char *local_name,int f_gen)
+{  
+	int fd1,fd2;
+	STRUCT_STAT st;
+	char *fname;
+	char fnametmp[MAXPATHLEN];
+	struct map_struct *buf;
+	int i;
+	struct file_struct *file;
+	int phase=0;
+	int recv_ok;
+	
+	if (verbose > 2) {
+		rprintf(FINFO,"recv_files(%d) starting\n",flist->count);
+	}
 
-      if (verbose > 2)
-	fprintf(stderr,"renaming %s to %s\n",fnametmp,fname);
-
-      if (make_backups) {
-	char fnamebak[MAXPATHLEN];
-	sprintf(fnamebak,"%s%s",fname,backup_suffix);
-	if (rename(fname,fnamebak) != 0 && errno != ENOENT) {
-	  fprintf(stderr,"rename %s %s : %s\n",fname,fnamebak,strerror(errno));
-	  exit(1);
+	if (recurse && delete_mode && !local_name && flist->count>0) {
+		delete_files(flist);
 	}
-      }
 
-      /* move tmp file over real file */
-      if (rename(fnametmp,fname) != 0) {
-	fprintf(stderr,"rename %s -> %s : %s\n",
-		fnametmp,fname,strerror(errno));
-      }
+	while (1) {      
+		i = read_int(f_in);
+		if (i == -1) {
+			if (phase==0 && remote_version >= 13) {
+				phase++;
+				csum_length = SUM_LENGTH;
+				if (verbose > 2)
+					rprintf(FINFO,"recv_files phase=%d\n",phase);
+				write_int(f_gen,-1);
+				continue;
+			}
+			break;
+		}
+
+		if (i < 0 || i >= flist->count) {
+			rprintf(FERROR,"Invalid file index %d in recv_files (count=%d)\n", 
+				i, flist->count);
+			exit_cleanup(1);
+		}
+
+		file = flist->files[i];
+		fname = f_name(file);
+
+		stats.num_transferred_files++;
+		stats.total_transferred_size += file->length;
+
+		if (local_name)
+			fname = local_name;
+
+		if (dry_run) {
+			if (!am_server && verbose)
+				printf("%s\n",fname);
+			continue;
+		}
+
+		if (verbose > 2)
+			rprintf(FINFO,"recv_files(%s)\n",fname);
+
+		/* open the file */  
+		fd1 = open(fname,O_RDONLY);
+
+		if (fd1 != -1 && do_fstat(fd1,&st) != 0) {
+			rprintf(FERROR,"fstat %s : %s\n",fname,strerror(errno));
+			receive_data(f_in,NULL,-1,NULL);
+			close(fd1);
+			continue;
+		}
+
+		if (fd1 != -1 && !S_ISREG(st.st_mode)) {
+			rprintf(FERROR,"%s : not a regular file (recv_files)\n",fname);
+			receive_data(f_in,NULL,-1,NULL);
+			close(fd1);
+			continue;
+		}
+
+		if (fd1 != -1 && st.st_size > 0) {
+			buf = map_file(fd1,st.st_size);
+			if (verbose > 2)
+				rprintf(FINFO,"recv mapped %s of size %d\n",fname,(int)st.st_size);
+		} else {
+			buf = NULL;
+		}
+
+		if (!get_tmpname(fnametmp,fname)) {
+			if (buf) unmap_file(buf);
+			close(fd1);
+			continue;
+		}
+
+		if (NULL == do_mktemp(fnametmp)) {
+			rprintf(FERROR,"mktemp %s failed\n",fnametmp);
+			receive_data(f_in,buf,-1,NULL);
+			if (buf) unmap_file(buf);
+			close(fd1);
+			continue;
+		}
+
+		fd2 = do_open(fnametmp,O_WRONLY|O_CREAT|O_EXCL,file->mode);
+		if (fd2 == -1 && relative_paths && errno == ENOENT && 
+		    create_directory_path(fnametmp) == 0) {
+			fd2 = do_open(fnametmp,O_WRONLY|O_CREAT|O_EXCL,file->mode);
+		}
+		if (fd2 == -1) {
+			rprintf(FERROR,"open %s : %s\n",fnametmp,strerror(errno));
+			receive_data(f_in,buf,-1,NULL);
+			if (buf) unmap_file(buf);
+			close(fd1);
+			continue;
+		}
+      
+		cleanup_fname = fnametmp;
+
+		if (!am_server && verbose)
+			printf("%s\n",fname);
+		
+		/* recv file data */
+		recv_ok = receive_data(f_in,buf,fd2,fname);
+		
+		if (buf) unmap_file(buf);
+		if (fd1 != -1) {
+			close(fd1);
+		}
+		close(fd2);
+		
+		if (verbose > 2)
+			rprintf(FINFO,"renaming %s to %s\n",fnametmp,fname);
+		
+		if (make_backups) {
+			char fnamebak[MAXPATHLEN];
+			if (strlen(fname) + strlen(backup_suffix) > (MAXPATHLEN-1)) {
+				rprintf(FERROR,"backup filename too long\n");
+				continue;
+			}
+			slprintf(fnamebak,sizeof(fnamebak)-1,"%s%s",fname,backup_suffix);
+			if (do_rename(fname,fnamebak) != 0 && errno != ENOENT) {
+				rprintf(FERROR,"rename %s %s : %s\n",fname,fnamebak,strerror(errno));
+				continue;
+			}
+		}
+
+		/* move tmp file over real file */
+		if (do_rename(fnametmp,fname) != 0) {
+			if (errno == EXDEV) {
+				/* rename failed on cross-filesystem link.  
+				   Copy the file instead. */
+				if (copy_file(fnametmp,fname, file->mode)) {
+					rprintf(FERROR,"copy %s -> %s : %s\n",
+						fnametmp,fname,strerror(errno));
+				} else {
+					set_perms(fname,file,NULL,0);
+				}
+				do_unlink(fnametmp);
+			} else {
+				rprintf(FERROR,"rename %s -> %s : %s\n",
+					fnametmp,fname,strerror(errno));
+				do_unlink(fnametmp);
+			}
+		} else {
+			set_perms(fname,file,NULL,0);
+		}
+
+		cleanup_fname = NULL;
+
+		
+		if (!recv_ok) {
+			if (csum_length == SUM_LENGTH) {
+				rprintf(FERROR,"ERROR: file corruption in %s. File changed during transfer?\n",
+					fname);
+			} else {
+				if (verbose > 1)
+					rprintf(FINFO,"redoing %s(%d)\n",fname,i);
+				write_int(f_gen,i);
+			}
+		}
+	}
 
-      cleanup_fname = NULL;
+	if (preserve_hard_links)
+		do_hard_links(flist);
 
-      set_perms(fname,&flist->files[i],NULL,0);
-    }
+	/* now we need to fix any directory permissions that were 
+	   modified during the transfer */
+	for (i = 0; i < flist->count; i++) {
+		file = flist->files[i];
+		if (!file->basename || !S_ISDIR(file->mode)) continue;
+		recv_generator(f_name(file),flist,i,-1);
+	}
 
-  if (verbose > 2)
-    fprintf(stderr,"recv_files finished\n");
-  
-  return 0;
+	if (verbose > 2)
+		rprintf(FINFO,"recv_files finished\n");
+	
+	return 0;
 }
 
 
 
-off_t send_files(struct file_list *flist,int f_out,int f_in)
+void send_files(struct file_list *flist,int f_out,int f_in)
 { 
   int fd;
   struct sum_struct *s;
-  char *buf;
-  struct stat st;
+  struct map_struct *buf;
+  STRUCT_STAT st;
   char fname[MAXPATHLEN];  
-  off_t total=0;
   int i;
+  struct file_struct *file;
+  int phase = 0;
 
   if (verbose > 2)
-    fprintf(stderr,"send_files starting\n");
-
-  setup_nonblocking(f_in,f_out);
-
-  while (1) 
-    {
-      i = read_int(f_in);
-      if (i == -1) break;
-
-      fname[0] = 0;
-      if (flist->files[i].dir) {
-	strcpy(fname,flist->files[i].dir);
-	strcat(fname,"/");
-      }
-      strcat(fname,flist->files[i].name);
-
-      if (verbose > 2) 
-	fprintf(stderr,"send_files(%d,%s)\n",i,fname);
-
-      if (dry_run) {	
-	if (!am_server && verbose)
-	  printf("%s\n",fname);
-	write_int(f_out,i);
-	continue;
-      }
-
-      s = receive_sums(f_in);
-      if (!s) {
-	fprintf(stderr,"receive_sums failed\n");
-	return -1;
-      }
-
-      fd = open(fname,O_RDONLY);
-      if (fd == -1) {
-	fprintf(stderr,"send_files failed to open %s: %s\n",
-		fname,strerror(errno));
-	continue;
-      }
-  
-      /* map the local file */
-      if (fstat(fd,&st) != 0) {
-	fprintf(stderr,"fstat failed : %s\n",strerror(errno));
-	return -1;
-      }
-      
-      if (st.st_size > 0) {
-	buf = map_file(fd,st.st_size);
-      } else {
-	buf = NULL;
-      }
-
-      if (verbose > 2)
-	fprintf(stderr,"send_files mapped %s of size %d\n",
-		fname,(int)st.st_size);
-
-      write_int(f_out,i);
-
-      write_int(f_out,s->count);
-      write_int(f_out,s->n);
-      write_int(f_out,s->remainder);
-
-      if (verbose > 2)
-	fprintf(stderr,"calling match_sums %s\n",fname);
-
-      if (!am_server && verbose)
-	printf("%s\n",fname);
-      
-      match_sums(f_out,s,buf,st.st_size);
-      write_flush(f_out);
-      
-      unmap_file(buf,st.st_size);
-      close(fd);
-
-      free_sums(s);
-
-      if (verbose > 2)
-	fprintf(stderr,"sender finished %s\n",fname);
+    rprintf(FINFO,"send_files starting\n");
+
+  setup_readbuffer(f_in);
+
+  while (1) {
+	  int offset=0;
+
+	  i = read_int(f_in);
+	  if (i == -1) {
+		  if (phase==0 && remote_version >= 13) {
+			  phase++;
+			  csum_length = SUM_LENGTH;
+			  write_int(f_out,-1);
+			  if (verbose > 2)
+				  rprintf(FINFO,"send_files phase=%d\n",phase);
+			  continue;
+		  }
+		  break;
+	  }
+
+	  if (i < 0 || i >= flist->count) {
+		  rprintf(FERROR,"Invalid file index %d (count=%d)\n", 
+			  i, flist->count);
+		  exit_cleanup(1);
+	  }
+
+	  file = flist->files[i];
+
+	  stats.num_transferred_files++;
+	  stats.total_transferred_size += file->length;
+
+	  fname[0] = 0;
+	  if (file->basedir) {
+		  strlcpy(fname,file->basedir,MAXPATHLEN-1);
+		  if (strlen(fname) == MAXPATHLEN-1) {
+			  io_error = 1;
+			  rprintf(FERROR, "send_files failed on long-named directory %s\n",
+				  fname);
+			  return;
+		  }
+		  strlcat(fname,"/",MAXPATHLEN-1);
+		  offset = strlen(file->basedir)+1;
+	  }
+	  strlcat(fname,f_name(file),MAXPATHLEN-strlen(fname));
+	  
+	  if (verbose > 2) 
+		  rprintf(FINFO,"send_files(%d,%s)\n",i,fname);
+	  
+	  if (dry_run) {	
+		  if (!am_server && verbose)
+			  printf("%s\n",fname);
+		  write_int(f_out,i);
+		  continue;
+	  }
+
+	  s = receive_sums(f_in);
+	  if (!s) {
+		  io_error = 1;
+		  rprintf(FERROR,"receive_sums failed\n");
+		  return;
+	  }
+	  
+	  fd = open(fname,O_RDONLY);
+	  if (fd == -1) {
+		  io_error = 1;
+		  rprintf(FERROR,"send_files failed to open %s: %s\n",
+			  fname,strerror(errno));
+		  free_sums(s);
+		  continue;
+	  }
+	  
+	  /* map the local file */
+	  if (do_fstat(fd,&st) != 0) {
+		  io_error = 1;
+		  rprintf(FERROR,"fstat failed : %s\n",strerror(errno));
+		  free_sums(s);
+		  close(fd);
+		  return;
+	  }
+	  
+	  if (st.st_size > 0) {
+		  buf = map_file(fd,st.st_size);
+	  } else {
+		  buf = NULL;
+	  }
+	  
+	  if (verbose > 2)
+		  rprintf(FINFO,"send_files mapped %s of size %d\n",
+			  fname,(int)st.st_size);
+	  
+	  write_int(f_out,i);
+	  
+	  write_int(f_out,s->count);
+	  write_int(f_out,s->n);
+	  write_int(f_out,s->remainder);
+	  
+	  if (verbose > 2)
+		  rprintf(FINFO,"calling match_sums %s\n",fname);
+	  
+	  if (!am_server && verbose)
+		  printf("%s\n",fname+offset);
+	  
+	  match_sums(f_out,s,buf,st.st_size);
+	  
+	  if (buf) unmap_file(buf);
+	  close(fd);
+	  
+	  free_sums(s);
+	  
+	  if (verbose > 2)
+		  rprintf(FINFO,"sender finished %s\n",fname);
+  }
 
-      total += st.st_size;
-    }
+  if (verbose > 2)
+	  rprintf(FINFO,"send files finished\n");
 
   match_report();
 
   write_int(f_out,-1);
-  write_flush(f_out);
-
-  return total;
 }
 
 
 
-void generate_files(int f,struct file_list *flist,char *local_name)
+void generate_files(int f,struct file_list *flist,char *local_name,int f_recv)
 {
   int i;
+  int phase=0;
 
   if (verbose > 2)
-    fprintf(stderr,"generator starting pid=%d count=%d\n",
+    rprintf(FINFO,"generator starting pid=%d count=%d\n",
 	    (int)getpid(),flist->count);
 
   for (i = 0; i < flist->count; i++) {
-    if (!flist->files[i].name) continue;
-    if (S_ISDIR(flist->files[i].mode)) {
-      if (dry_run) continue;
-      if (mkdir(flist->files[i].name,flist->files[i].mode) != 0 &&
-	  errno != EEXIST) {
-	fprintf(stderr,"mkdir %s : %s\n",
-		flist->files[i].name,strerror(errno));
-      }
-      continue;
+    struct file_struct *file = flist->files[i];
+    mode_t saved_mode = file->mode;
+    if (!file->basename) continue;
+
+    /* we need to ensure that any directories we create have writeable
+       permissions initially so that we can create the files within
+       them. This is then fixed after the files are transferred */
+    if (!am_root && S_ISDIR(file->mode)) {
+      file->mode |= S_IWUSR; /* user write */
     }
-    recv_generator(local_name?local_name:flist->files[i].name,
+
+    recv_generator(local_name?local_name:f_name(file),
 		   flist,i,f);
+
+    file->mode = saved_mode;
   }
-  write_int(f,-1);
-  write_flush(f);
+
+  phase++;
+  csum_length = SUM_LENGTH;
+  ignore_times=1;
+
   if (verbose > 2)
-    fprintf(stderr,"generator wrote %d\n",write_total());
+    rprintf(FINFO,"generate_files phase=%d\n",phase);
+
+  write_int(f,-1);
+
+  /* we expect to just sit around now, so don't exit on a timeout. If we
+     really get a timeout then the other process should exit */
+  io_timeout = 0;
+
+  if (remote_version >= 13) {
+    /* in newer versions of the protocol the files can cycle through
+       the system more than once to catch initial checksum errors */
+    for (i=read_int(f_recv); i != -1; i=read_int(f_recv)) {
+      struct file_struct *file = flist->files[i];
+      recv_generator(local_name?local_name:f_name(file),
+		     flist,i,f);    
+    }
+
+    phase++;
+    if (verbose > 2)
+      rprintf(FINFO,"generate_files phase=%d\n",phase);
+
+    write_int(f,-1);
+  }
 }
+
+