Tweaking the license text a bit more.
[rsync/rsync.git] / sender.c
index adfe7d5..e9c48da 100644 (file)
--- a/sender.c
+++ b/sender.c
@@ -1,43 +1,50 @@
 /*
-   Copyright (C) Andrew Tridgell 1996
-   Copyright (C) Paul Mackerras 1996
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
+ * Routines only used by the sending process.
+ *
+ * Copyright (C) 1996 Andrew Tridgell
+ * Copyright (C) 1996 Paul Mackerras
+ * Copyright (C) 2003-2007 Wayne Davison
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, visit the http://fsf.org website.
+ */
 
 #include "rsync.h"
 
 extern int verbose;
 extern int dry_run;
+extern int do_xfers;
 extern int am_server;
 extern int am_daemon;
+extern int inc_recurse;
 extern int log_before_transfer;
-extern int log_format_has_i;
-extern int daemon_log_format_has_i;
+extern int stdout_format_has_i;
+extern int logfile_format_has_i;
 extern int csum_length;
+extern int append_mode;
 extern int io_error;
+extern int allowed_lull;
+extern int preserve_xattrs;
 extern int protocol_version;
-extern int remove_sent_files;
+extern int remove_source_files;
 extern int updating_basis_file;
 extern int make_backups;
 extern int do_progress;
 extern int inplace;
+extern int batch_fd;
+extern int write_batch;
 extern struct stats stats;
-extern struct file_list *the_file_list;
-extern char *log_format;
-
+extern struct file_list *cur_flist, *first_flist, *dir_flist;
 
 /**
  * @file
@@ -54,6 +61,7 @@ static struct sum_struct *receive_sums(int f)
 {
        struct sum_struct *s;
        int32 i;
+       int lull_mod = allowed_lull * 5;
        OFF_T offset = 0;
 
        if (!(s = new(struct sum_struct)))
@@ -68,6 +76,13 @@ static struct sum_struct *receive_sums(int f)
                        (double)s->count, (long)s->blength, (long)s->remainder);
        }
 
+       if (append_mode > 0) {
+               s->flength = (OFF_T)s->count * s->blength;
+               if (s->remainder)
+                       s->flength -= s->blength - s->remainder;
+               return s;
+       }
+
        if (s->count == 0)
                return(s);
 
@@ -87,6 +102,9 @@ static struct sum_struct *receive_sums(int f)
                        s->sums[i].len = s->blength;
                offset += s->sums[i].len;
 
+               if (allowed_lull && !(i % lull_mod))
+                       maybe_send_keepalive();
+
                if (verbose > 3) {
                        rprintf(FINFO,
                                "chunk[%d] len=%d offset=%.0f sum1=%08x\n",
@@ -104,176 +122,157 @@ void successful_send(int ndx)
 {
        char fname[MAXPATHLEN];
        struct file_struct *file;
-       unsigned int offset;
+       struct file_list *flist;
 
-       if (ndx < 0 || ndx >= the_file_list->count)
+       if (!remove_source_files)
                return;
 
-       file = the_file_list->files[ndx];
-       /* The generator might tell us about symlinks we didn't send. */
-       if (!(file->flags & FLAG_SENT) && !S_ISLNK(file->mode))
+       if (!(flist = flist_for_ndx(ndx))) {
+               rprintf(FERROR,
+                       "INTERNAL ERROR: unable to find flist for item %d\n",
+                       ndx);
                return;
-       if (file->dir.root) {
-               offset = stringjoin(fname, sizeof fname,
-                                   file->dir.root, "/", NULL);
-       } else
-               offset = 0;
-       f_name_to(file, fname + offset);
-       if (remove_sent_files && do_unlink(fname) == 0 && verbose > 1) {
-               rprintf(FINFO, "sender removed %s\n",
-                       safe_fname(fname + offset));
        }
+
+       file = flist->files[ndx - flist->ndx_start];
+       if (!push_pathname(F_PATHNAME(file), -1))
+               return;
+       f_name(file, fname);
+
+       if (do_unlink(fname) == 0) {
+               if (verbose > 1)
+                       rprintf(FINFO, "sender removed %s\n", fname);
+       } else
+               rsyserr(FERROR, errno, "sender failed to remove %s", fname);
 }
 
-static void write_item_attrs(int f_out, int ndx, int iflags,
-                            uchar fnamecmp_type, char *buf, int len)
+static void write_ndx_and_attrs(int f_out, int ndx, int iflags,
+                               const char *fname, struct file_struct *file,
+                               uchar fnamecmp_type, char *buf, int len)
 {
-       write_int(f_out, ndx);
+       write_ndx(f_out, ndx);
        if (protocol_version < 29)
                return;
        write_shortint(f_out, iflags);
        if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
                write_byte(f_out, fnamecmp_type);
-       if (iflags & ITEM_XNAME_FOLLOWS) {
-               if (len < 0)
-                       len = strlen(buf);
+       if (iflags & ITEM_XNAME_FOLLOWS)
                write_vstring(f_out, buf, len);
-       }
-}
-
-/* This is also used 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 len;
-       uchar fnamecmp_type = FNAMECMP_FNAME;
-       int iflags = protocol_version >= 29 ? read_shortint(f_in)
-                  : ITEM_TRANSFER | ITEM_MISSING_DATA;
-       int isave = iflags; /* XXX remove soon */
-
-       /* 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 [%s]\n",
-                       who_am_i());
-               exit_cleanup(RERR_PROTOCOL);
-       }
-
-       if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
-               fnamecmp_type = read_byte(f_in);
-       *type_ptr = fnamecmp_type;
-
-       if (iflags & ITEM_XNAME_FOLLOWS) {
-               if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0)
-                       exit_cleanup(RERR_PROTOCOL);
-       } else {
-               *buf = '\0';
-               len = -1;
-       }
-       *len_ptr = len;
-
-       /* XXX Temporary backward compatibility when talking to 2.6.4pre[12] */
-       if (protocol_version >= 29 && iflags & ITEM_TRANSFER
-           && !S_ISREG(the_file_list->files[ndx]->mode)) {
-               iflags &= ~ITEM_TRANSFER;
-               iflags |= ITEM_LOCAL_CHANGE;
-       }
-
-       if (iflags & ITEM_TRANSFER) {
-               if (!S_ISREG(the_file_list->files[ndx]->mode)) {
-                       rprintf(FERROR,
-                               "received index of non-regular file: %d [%s]\n",
-                               ndx, who_am_i());
-                       exit_cleanup(RERR_PROTOCOL);
-               }
-       } else if (f_out >= 0) {
-               write_item_attrs(f_out, ndx, isave /*XXX iflags */,
-                                fnamecmp_type, buf, len);
-       }
-
-       return iflags;
+#ifdef SUPPORT_XATTRS
+       if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && !dry_run)
+               send_xattr_request(fname, file, f_out);
+#endif
 }
 
-void send_files(struct file_list *flist, int f_out, int f_in)
+void send_files(int f_in, int f_out)
 {
        int fd = -1;
        struct sum_struct *s;
        struct map_struct *mbuf = NULL;
        STRUCT_STAT st;
-       char *fname2, fname[MAXPATHLEN];
-       char xname[MAXPATHLEN];
+       char fname[MAXPATHLEN], xname[MAXPATHLEN];
+       const char *path, *slash;
        uchar fnamecmp_type;
        int iflags, xlen;
        struct file_struct *file;
-       int phase = 0;
+       int phase = 0, max_phase = protocol_version >= 29 ? 2 : 1;
        struct stats initial_stats;
-       int save_make_backups = make_backups;
-       int itemizing = am_daemon ? daemon_log_format_has_i
-                     : !am_server && log_format_has_i;
-       int i, j;
+       int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
+       enum logcode log_code = log_before_transfer ? FLOG : FINFO;
+       int f_xfer = write_batch < 0 ? batch_fd : f_out;
+       int ndx, j;
 
        if (verbose > 2)
                rprintf(FINFO, "send_files starting\n");
 
        while (1) {
-               unsigned int offset;
+               if (inc_recurse)
+                       send_extra_file_list(f_out, FILECNT_LOOKAHEAD);
 
-               i = read_int(f_in);
-               if (i == -1) {
-                       if (phase == 0) {
-                               phase++;
-                               csum_length = SUM_LENGTH;
-                               write_int(f_out, -1);
-                               if (verbose > 2)
-                                       rprintf(FINFO, "send_files phase=%d\n", phase);
-                               /* For inplace: redo phase turns off the backup
-                                * flag so that we do a regular inplace send. */
-                               make_backups = 0;
-                               continue;
+               /* This call also sets cur_flist. */
+               ndx = read_ndx_and_attrs(f_in, &iflags, &fnamecmp_type,
+                                        xname, &xlen);
+               if (ndx == NDX_DONE) {
+                       if (inc_recurse && first_flist) {
+                               flist_free(first_flist);
+                               if (first_flist) {
+                                       write_ndx(f_out, NDX_DONE);
+                                       continue;
+                               }
                        }
-                       break;
+                       if (++phase > max_phase)
+                               break;
+                       if (verbose > 2)
+                               rprintf(FINFO, "send_files phase=%d\n", phase);
+                       write_ndx(f_out, NDX_DONE);
+                       continue;
                }
 
-               iflags = read_item_attrs(f_in, f_out, i, &fnamecmp_type,
-                                        xname, &xlen);
-               if (iflags == ITEM_IS_NEW) /* no-op packet */
-                       continue;
+               if (inc_recurse)
+                       send_extra_file_list(f_out, FILECNT_LOOKAHEAD);
 
-               file = flist->files[i];
-               if (file->dir.root) {
-                       /* N.B. We're sure that this fits, so offset is OK. */
-                       offset = strlcpy(fname, file->dir.root, sizeof fname);
-                       if (!offset || fname[offset-1] != '/')
-                               fname[offset++] = '/';
-               } else
-                       offset = 0;
-               fname2 = f_name_to(file, fname + offset);
+               if (ndx - cur_flist->ndx_start >= 0)
+                       file = cur_flist->files[ndx - cur_flist->ndx_start];
+               else
+                       file = dir_flist->files[cur_flist->parent_ndx];
+               if (F_PATHNAME(file)) {
+                       path = F_PATHNAME(file);
+                       slash = "/";
+               } else {
+                       path = slash = "";
+               }
+               if (!push_pathname(F_PATHNAME(file), -1))
+                       continue;
+               f_name(file, fname);
 
                if (verbose > 2)
-                       rprintf(FINFO, "send_files(%d, %s)\n", i, fname);
+                       rprintf(FINFO, "send_files(%d, %s%s%s)\n", ndx, path,slash,fname);
+
+#ifdef SUPPORT_XATTRS
+               if (preserve_xattrs && iflags & ITEM_REPORT_XATTR)
+                       recv_xattr_request(file, f_in);
+#endif
 
                if (!(iflags & ITEM_TRANSFER)) {
                        maybe_log_item(file, iflags, itemizing, xname);
+                       write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
+                                           fnamecmp_type, xname, xlen);
                        continue;
                }
+               if (phase == 2) {
+                       rprintf(FERROR,
+                               "got transfer request in phase 2 [%s]\n",
+                               who_am_i());
+                       exit_cleanup(RERR_PROTOCOL);
+               }
+
+               if (file->flags & FLAG_FILE_SENT) {
+                       if (csum_length == SHORT_SUM_LENGTH) {
+                               /* For inplace: redo phase turns off the backup
+                                * flag so that we do a regular inplace send. */
+                               make_backups = -make_backups;
+                               append_mode = -append_mode;
+                               csum_length = SUM_LENGTH;
+                       }
+               } else {
+                       if (csum_length != SHORT_SUM_LENGTH) {
+                               make_backups = -make_backups;
+                               append_mode = -append_mode;
+                               csum_length = SHORT_SUM_LENGTH;
+                       }
+               }
 
                updating_basis_file = inplace && (protocol_version >= 29
-                       ? fnamecmp_type == FNAMECMP_FNAME : !make_backups);
+                       ? fnamecmp_type == FNAMECMP_FNAME : make_backups <= 0);
 
-               stats.current_file_index = i;
+               stats.current_file_index = ndx;
                stats.num_transferred_files++;
-               stats.total_transferred_size += file->length;
+               stats.total_transferred_size += F_LENGTH(file);
 
-               if (dry_run) { /* log the transfer */
-                       if (!am_server && log_format)
-                               log_item(file, &stats, iflags, NULL);
-                       write_item_attrs(f_out, i, iflags, fnamecmp_type,
-                                        xname, xlen);
+               if (!do_xfers) { /* log the transfer */
+                       log_item(FCLIENT, file, &stats, iflags, NULL);
+                       write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
+                                           fnamecmp_type, xname, xlen);
                        continue;
                }
 
@@ -282,7 +281,7 @@ void send_files(struct file_list *flist, int f_out, int f_in)
                if (!(s = receive_sums(f_in))) {
                        io_error |= IOERR_GENERAL;
                        rprintf(FERROR, "receive_sums failed\n");
-                       return;
+                       exit_cleanup(RERR_PROTOCOL);
                }
 
                fd = do_open(fname, O_RDONLY, 0);
@@ -301,6 +300,8 @@ void send_files(struct file_list *flist, int f_out, int f_in)
                                        full_fname(fname));
                        }
                        free_sums(s);
+                       if (protocol_version >= 30)
+                               send_msg_int(MSG_NO_SEND, ndx);
                        continue;
                }
 
@@ -310,7 +311,7 @@ void send_files(struct file_list *flist, int f_out, int f_in)
                        rsyserr(FERROR, errno, "fstat failed");
                        free_sums(s);
                        close(fd);
-                       return;
+                       exit_cleanup(RERR_PROTOCOL);
                }
 
                if (st.st_size) {
@@ -320,31 +321,29 @@ void send_files(struct file_list *flist, int f_out, int f_in)
                        mbuf = NULL;
 
                if (verbose > 2) {
-                       rprintf(FINFO, "send_files mapped %s of size %.0f\n",
-                               safe_fname(fname), (double)st.st_size);
+                       rprintf(FINFO, "send_files mapped %s%s%s of size %.0f\n",
+                               path,slash,fname, (double)st.st_size);
                }
 
-               write_item_attrs(f_out, i, iflags, fnamecmp_type, xname, xlen);
-               write_sum_head(f_out, s);
+               write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
+                                   fnamecmp_type, xname, xlen);
+               write_sum_head(f_xfer, s);
 
-               if (verbose > 2) {
-                       rprintf(FINFO, "calling match_sums %s\n",
-                               safe_fname(fname));
-               }
+               if (verbose > 2)
+                       rprintf(FINFO, "calling match_sums %s%s%s\n", path,slash,fname);
 
                if (log_before_transfer)
-                       log_item(file, &initial_stats, iflags, NULL);
+                       log_item(FCLIENT, file, &initial_stats, iflags, NULL);
                else if (!am_server && verbose && do_progress)
-                       rprintf(FINFO, "%s\n", safe_fname(fname2));
+                       rprintf(FCLIENT, "%s\n", fname);
 
                set_compression(fname);
 
-               match_sums(f_out, s, mbuf, st.st_size);
+               match_sums(f_xfer, s, mbuf, st.st_size);
                if (do_progress)
                        end_progress(st.st_size);
 
-               if (!log_before_transfer)
-                       log_item(file, &initial_stats, iflags, NULL);
+               log_item(log_code, file, &initial_stats, iflags, NULL);
 
                if (mbuf) {
                        j = unmap_file(mbuf);
@@ -359,20 +358,19 @@ void send_files(struct file_list *flist, int f_out, int f_in)
 
                free_sums(s);
 
-               if (verbose > 2) {
-                       rprintf(FINFO, "sender finished %s\n",
-                               safe_fname(fname));
-               }
+               if (verbose > 2)
+                       rprintf(FINFO, "sender finished %s%s%s\n", path,slash,fname);
 
                /* Flag that we actually sent this entry. */
-               file->flags |= FLAG_SENT;
+               file->flags |= FLAG_FILE_SENT;
        }
-       make_backups = save_make_backups;
+       if (make_backups < 0)
+               make_backups = -make_backups;
 
        if (verbose > 2)
                rprintf(FINFO, "send files finished\n");
 
        match_report();
 
-       write_int(f_out, -1);
+       write_ndx(f_out, NDX_DONE);
 }