sender.c

   1 /*
   2    Copyright (C) Andrew Tridgell 1996
   3    Copyright (C) Paul Mackerras 1996
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18 */
  19
  20 #include "rsync.h"
  21
  22 extern int verbose;
  23 extern int remote_version;
  24 extern int csum_length;
  25 extern struct stats stats;
  26 extern int io_error;
  27 extern int dry_run;
  28 extern int am_server;
  29
  30
  31 /*
  32   receive the checksums for a buffer
  33   */
  34 static struct sum_struct *receive_sums(int f)
  35 {
  36         struct sum_struct *s;
  37         int i;
  38         OFF_T offset = 0;
  39
  40         s = (struct sum_struct *)malloc(sizeof(*s));
  41         if (!s) out_of_memory("receive_sums");
  42
  43         s->count = read_int(f);
  44         s->n = read_int(f);
  45         s->remainder = read_int(f);
  46         s->sums = NULL;
  47
  48         if (verbose > 3)
  49                 rprintf(FINFO,"count=%d n=%d rem=%d\n",
  50                         s->count,s->n,s->remainder);
  51
  52         if (s->count == 0)
  53                 return(s);
  54
  55         s->sums = (struct sum_buf *)malloc(sizeof(s->sums[0])*s->count);
  56         if (!s->sums) out_of_memory("receive_sums");
  57
  58         for (i=0;i<s->count;i++) {
  59                 s->sums[i].sum1 = read_int(f);
  60                 read_buf(f,s->sums[i].sum2,csum_length);
  61
  62                 s->sums[i].offset = offset;
  63                 s->sums[i].i = i;
  64
  65                 if (i == s->count-1 && s->remainder != 0) {
  66                         s->sums[i].len = s->remainder;
  67                 } else {
  68                         s->sums[i].len = s->n;
  69                 }
  70                 offset += s->sums[i].len;
  71
  72                 if (verbose > 3)
  73                         rprintf(FINFO,"chunk[%d] len=%d offset=%d sum1=%08x\n",
  74                                 i,s->sums[i].len,(int)s->sums[i].offset,s->sums[i].sum1);
  75         }
  76
  77         s->flength = offset;
  78
  79         return s;
  80 }
  81
  82
  83
  84 void send_files(struct file_list *flist,int f_out,int f_in)
  85 {
  86         int fd;
  87         struct sum_struct *s;
  88         struct map_struct *buf;
  89         STRUCT_STAT st;
  90         char fname[MAXPATHLEN];
  91         int i;
  92         struct file_struct *file;
  93         int phase = 0;
  94
  95         if (verbose > 2)
  96                 rprintf(FINFO,"send_files starting\n");
  97
  98         setup_readbuffer(f_in);
  99
 100         while (1) {
 101                 int offset=0;
 102
 103                 i = read_int(f_in);
 104                 if (i == -1) {
 105                         if (phase==0 && remote_version >= 13) {
 106                                 phase++;
 107                                 csum_length = SUM_LENGTH;
 108                                 write_int(f_out,-1);
 109                                 if (verbose > 2)
 110                                         rprintf(FINFO,"send_files phase=%d\n",phase);
 111                                 continue;
 112                         }
 113                         break;
 114                 }
 115
 116                 if (i < 0 || i >= flist->count) {
 117                         rprintf(FERROR,"Invalid file index %d (count=%d)\n",
 118                                 i, flist->count);
 119                         exit_cleanup(1);
 120                 }
 121
 122                 file = flist->files[i];
 123
 124                 stats.num_transferred_files++;
 125                 stats.total_transferred_size += file->length;
 126
 127                 fname[0] = 0;
 128                 if (file->basedir) {
 129                         strlcpy(fname,file->basedir,MAXPATHLEN-1);
 130                         if (strlen(fname) == MAXPATHLEN-1) {
 131                                 io_error = 1;
 132                                 rprintf(FERROR, "send_files failed on long-named directory %s\n",
 133                                         fname);
 134                                 return;
 135                         }
 136                         strlcat(fname,"/",MAXPATHLEN-1);
 137                         offset = strlen(file->basedir)+1;
 138                 }
 139                 strlcat(fname,f_name(file),MAXPATHLEN-strlen(fname));
 140
 141                 if (verbose > 2)
 142                         rprintf(FINFO,"send_files(%d,%s)\n",i,fname);
 143
 144                 if (dry_run) {
 145                         if (!am_server && verbose)
 146                                 rprintf(FINFO,"%s\n",fname);
 147                         write_int(f_out,i);
 148                         continue;
 149                 }
 150
 151                 s = receive_sums(f_in);
 152                 if (!s) {
 153                         io_error = 1;
 154                         rprintf(FERROR,"receive_sums failed\n");
 155                         return;
 156                 }
 157
 158                 fd = open(fname,O_RDONLY);
 159                 if (fd == -1) {
 160                         io_error = 1;
 161                         rprintf(FERROR,"send_files failed to open %s: %s\n",
 162                                 fname,strerror(errno));
 163                         free_sums(s);
 164                         continue;
 165                 }
 166
 167                 /* map the local file */
 168                 if (do_fstat(fd,&st) != 0) {
 169                         io_error = 1;
 170                         rprintf(FERROR,"fstat failed : %s\n",strerror(errno));
 171                         free_sums(s);
 172                         close(fd);
 173                         return;
 174                 }
 175
 176                 if (st.st_size > 0) {
 177                         buf = map_file(fd,st.st_size);
 178                 } else {
 179                         buf = NULL;
 180                 }
 181
 182                 if (verbose > 2)
 183                         rprintf(FINFO,"send_files mapped %s of size %d\n",
 184                                 fname,(int)st.st_size);
 185
 186                 write_int(f_out,i);
 187
 188                 write_int(f_out,s->count);
 189                 write_int(f_out,s->n);
 190                 write_int(f_out,s->remainder);
 191
 192                 if (verbose > 2)
 193                         rprintf(FINFO,"calling match_sums %s\n",fname);
 194
 195                 if (!am_server && verbose)
 196                         rprintf(FINFO,"%s\n",fname+offset);
 197
 198                 match_sums(f_out,s,buf,st.st_size);
 199
 200                 if (buf) unmap_file(buf);
 201                 close(fd);
 202
 203                 free_sums(s);
 204
 205                 if (verbose > 2)
 206                         rprintf(FINFO,"sender finished %s\n",fname);
 207         }
 208
 209         if (verbose > 2)
 210                 rprintf(FINFO,"send files finished\n");
 211
 212         match_report();
 213
 214         write_int(f_out,-1);
 215 }
 216
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 218
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 220