Mention recent changes.
[rsync/rsync.git] / sender.c
index a9c31bb..3c14ddf 100644 (file)
--- a/sender.c
+++ b/sender.c
@@ -25,6 +25,8 @@ extern struct stats stats;
 extern int io_error;
 extern int dry_run;
 extern int am_server;
+extern int am_daemon;
+extern int protocol_version;
 
 
 /**
@@ -34,18 +36,20 @@ extern int am_server;
  * and transmits them to the receiver.  The sender process runs on the
  * machine holding the source files.
  **/
-
-
 void read_sum_head(int f, struct sum_struct *sum)
 {
-       extern int protocol_version;
-
        sum->count = read_int(f);
        sum->blength = read_int(f);
-       if (protocol_version < 27)
+       if (protocol_version < 27) {
                sum->s2length = csum_length;
-       else
+       } else {
                sum->s2length = read_int(f);
+               if (sum->s2length > MD4_SUM_LENGTH) {
+                       rprintf(FERROR, "Invalid checksum length %ld\n",
+                           (long)sum->s2length);
+                       exit_cleanup(RERR_PROTOCOL);
+               }
+       }
        sum->remainder = read_int(f);
 }
 
@@ -65,10 +69,10 @@ static struct sum_struct *receive_sums(int f)
 
        s->sums = NULL;
 
-       if (verbose > 3)
-               rprintf(FINFO, "count=%ld n=%ld rem=%ld\n",
-                       (long) s->count, (long) s->blength,
-                       (long) s->remainder);
+       if (verbose > 3) {
+               rprintf(FINFO, "count=%ld n=%u rem=%u\n",
+                       (long)s->count, s->blength, s->remainder);
+       }
 
        if (s->count == 0)
                return(s);
@@ -106,7 +110,7 @@ void send_files(struct file_list *flist, int f_out, int f_in)
 {
        int fd = -1;
        struct sum_struct *s;
-       struct map_struct *buf = NULL;
+       struct map_struct *mbuf = NULL;
        STRUCT_STAT st;
        char fname[MAXPATHLEN];
        int i;
@@ -114,19 +118,19 @@ void send_files(struct file_list *flist, int f_out, int f_in)
        int phase = 0;
        extern struct stats stats;
        struct stats initial_stats;
-       extern int write_batch;   /* dw */
-       extern int read_batch;    /* dw */
-       int checksums_match;   /* dw */
-       int buff_len;  /* dw */
-       char buff[CHUNK_SIZE];    /* dw */
-       int j;   /* dw */
-       int done;   /* dw */
+       extern int write_batch;
+       extern int read_batch;
+       int checksums_match;
+       int buff_len;
+       char buff[CHUNK_SIZE];
+       int j;
+       int done;
 
        if (verbose > 2)
                rprintf(FINFO, "send_files starting\n");
 
        while (1) {
-               int offset = 0;
+               unsigned int offset;
 
                i = read_int(f_in);
                if (i == -1) {
@@ -149,28 +153,24 @@ void send_files(struct file_list *flist, int f_out, int f_in)
 
                file = flist->files[i];
 
+               stats.current_file_index = i;
                stats.num_transferred_files++;
                stats.total_transferred_size += file->length;
 
-               fname[0] = 0;
                if (file->basedir) {
-                       strlcpy(fname, file->basedir, MAXPATHLEN);
-                       if (strlen(fname) == MAXPATHLEN-1) {
-                               io_error = 1;
-                               rprintf(FERROR, "send_files failed on long-named directory %s\n",
-                                       full_fname(fname));
-                               return;
-                       }
-                       strlcat(fname, "/", MAXPATHLEN);
-                       offset = strlen(file->basedir)+1;
-               }
-               strlcat(fname, f_name(file), MAXPATHLEN);
+                       /* N.B. We're sure that this fits, so offset is OK. */
+                       offset = strlcpy(fname, file->basedir, sizeof fname);
+                       if (!offset || fname[offset-1] != '/')
+                               fname[offset++] = '/';
+               } else
+                       offset = 0;
+               f_name_to(file, fname + offset);
 
                if (verbose > 2)
                        rprintf(FINFO, "send_files(%d, %s)\n", i, fname);
 
                if (dry_run) {
-                       if (!am_server && verbose) {    /* log transfer */
+                       if (!am_server && verbose) {
                                rprintf(FINFO, "%s\n", fname+offset);
                        }
                        write_int(f_out, i);
@@ -181,47 +181,54 @@ void send_files(struct file_list *flist, int f_out, int f_in)
 
                s = receive_sums(f_in);
                if (!s) {
-                       io_error = 1;
+                       io_error |= IOERR_GENERAL;
                        rprintf(FERROR, "receive_sums failed\n");
                        return;
                }
 
                if (write_batch)
-                       write_batch_csum_info(&i, flist->count, s);
+                       write_batch_csum_info(&i, s);
 
                if (!read_batch) {
                        fd = do_open(fname, O_RDONLY, 0);
                        if (fd == -1) {
-                               io_error = 1;
-                               rprintf(FERROR, "send_files failed to open %s: %s\n",
-                                       full_fname(fname), strerror(errno));
+                               if (errno == ENOENT) {
+                                       enum logcode c = am_daemon
+                                           && protocol_version < 28 ? FERROR
+                                                                    : FINFO;
+                                       io_error |= IOERR_VANISHED;
+                                       rprintf(c, "file has vanished: %s\n",
+                                               full_fname(fname));
+                               } else {
+                                       io_error |= IOERR_GENERAL;
+                                       rsyserr(FERROR, errno,
+                                               "send_files failed to open %s",
+                                               full_fname(fname));
+                               }
                                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));
+                               io_error |= IOERR_GENERAL;
+                               rsyserr(FERROR, errno, "fstat failed");
                                free_sums(s);
                                close(fd);
                                return;
                        }
 
-                       if (st.st_size > 0) {
-                               buf = map_file(fd, st.st_size);
-                       } else {
-                               buf = NULL;
-                       }
+                       mbuf = st.st_size ? map_file(fd, st.st_size) : NULL;
 
-                       if (verbose > 2)
+                       if (verbose > 2) {
                                rprintf(FINFO, "send_files mapped %s of size %.0f\n",
                                        fname, (double)st.st_size);
+                       }
 
                        write_int(f_out, i);
 
                        if (write_batch)
-                               write_batch_delta_file((char *)&i, sizeof(i));
+                               write_batch_delta_file((char *)&i, sizeof i);
 
                        write_sum_head(f_out, s);
                }
@@ -229,17 +236,17 @@ void send_files(struct file_list *flist, int f_out, int f_in)
                if (verbose > 2 && !read_batch)
                        rprintf(FINFO, "calling match_sums %s\n", fname);
 
-               if (!am_server && verbose) {    /* log transfer */
+               if (!am_server && verbose) {
                        rprintf(FINFO, "%s\n", fname+offset);
                }
 
                set_compression(fname);
 
-               if (read_batch) { /* dw */
+               if (read_batch) {
                        /* read checksums originally computed on sender side */
                        read_batch_csum_info(i, s, &checksums_match);
                        if (checksums_match) {
-                               read_batch_delta_file( (char *) &j, sizeof(int) );
+                               read_batch_delta_file((char*)&j, sizeof (int));
                                if (j != i) {    /* if flist index entries don't match*/
                                        rprintf(FINFO, "index mismatch in send_files\n");
                                        rprintf(FINFO, "read index = %d flist ndx = %d\n", j, i);
@@ -251,7 +258,7 @@ void send_files(struct file_list *flist, int f_out, int f_in)
                                        write_sum_head(f_out, s);
                                        done = 0;
                                        while (!done) {
-                                               read_batch_delta_file( (char *) &buff_len, sizeof(int) );
+                                               read_batch_delta_file((char*)&buff_len, sizeof (int));
                                                write_int(f_out, buff_len);
                                                if (buff_len == 0) {
                                                        done = 1;
@@ -261,31 +268,29 @@ void send_files(struct file_list *flist, int f_out, int f_in)
                                                                write_buf(f_out, buff, buff_len);
                                                        }
                                                }
-                                       }  /* end while  */
-                                       read_batch_delta_file( buff, MD4_SUM_LENGTH);
+                                       }
+                                       read_batch_delta_file(buff, MD4_SUM_LENGTH);
                                        write_buf(f_out, buff, MD4_SUM_LENGTH);
 
-                               }  /* j=i */
+                               }
                        } else {  /* not checksum match */
                                rprintf (FINFO, "readbatch & checksums don't match\n");
                                rprintf (FINFO, "filename=%s is being skipped\n", fname);
                                continue;
                        }
-               } else  {
-                       match_sums(f_out, s, buf, st.st_size);
+               } else  { /* not read_batch */
+                       match_sums(f_out, s, mbuf, st.st_size);
                        log_send(file, &initial_stats);
                }
 
-               if (!read_batch) { /* dw */
-                       if (buf) {
-                               j = unmap_file(buf);
+               if (!read_batch) {
+                       if (mbuf) {
+                               j = unmap_file(mbuf);
                                if (j) {
-                                       io_error = 1;
-                                       rprintf(FERROR,
-                                           "read errors mapping %s: (%d) %s\n",
-                                           full_fname(fname),
-                                           j,
-                                           strerror(j));
+                                       io_error |= IOERR_GENERAL;
+                                       rsyserr(FERROR, j,
+                                               "read errors mapping %s",
+                                               full_fname(fname));
                                }
                        }
                        close(fd);
@@ -303,7 +308,7 @@ void send_files(struct file_list *flist, int f_out, int f_in)
        match_report();
 
        write_int(f_out, -1);
-       if (write_batch || read_batch) { /* dw */
+       if (write_batch || read_batch) {
                close_batch_csums_file();
                close_batch_delta_file();
        }