1 This patch adds the --copy-devices option, which will try to copy
2 the data inside a device instead of duplicating the device node.
4 To use this patch, run these commands for a successful build:
6 patch -p1 <patches/copy-devices.diff
8 ./configure (optional if already run)
11 based-on: 181c9faf928faad08ef095f4667afe460ec3bef6
12 diff --git a/generator.c b/generator.c
15 @@ -39,6 +39,7 @@ extern int preserve_acls;
16 extern int preserve_xattrs;
17 extern int preserve_links;
18 extern int preserve_devices;
19 +extern int copy_devices;
20 extern int preserve_specials;
21 extern int preserve_hard_links;
22 extern int preserve_executability;
23 @@ -1511,7 +1512,7 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
27 - if (!S_ISREG(file->mode)) {
28 + if (!(S_ISREG(file->mode) || (copy_devices && IS_DEVICE(file->mode)))) {
30 fname = f_name(file, NULL);
31 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
32 diff --git a/options.c b/options.c
35 @@ -48,6 +48,7 @@ int append_mode = 0;
36 int keep_dirlinks = 0;
37 int copy_dirlinks = 0;
39 +int copy_devices = 0;
40 int preserve_links = 0;
41 int preserve_hard_links = 0;
42 int preserve_acls = 0;
43 @@ -694,6 +695,7 @@ void usage(enum logcode F)
44 rprintf(F," -o, --owner preserve owner (super-user only)\n");
45 rprintf(F," -g, --group preserve group\n");
46 rprintf(F," --devices preserve device files (super-user only)\n");
47 + rprintf(F," --copy-devices copy device contents as regular file\n");
48 rprintf(F," --specials preserve special files\n");
49 rprintf(F," -D same as --devices --specials\n");
50 rprintf(F," -t, --times preserve modification times\n");
51 @@ -862,6 +864,7 @@ static struct poptOption long_options[] = {
52 {"no-D", 0, POPT_ARG_NONE, 0, OPT_NO_D, 0, 0 },
53 {"devices", 0, POPT_ARG_VAL, &preserve_devices, 1, 0, 0 },
54 {"no-devices", 0, POPT_ARG_VAL, &preserve_devices, 0, 0, 0 },
55 + {"copy-devices", 0, POPT_ARG_NONE, ©_devices, 0, 0, 0 },
56 {"specials", 0, POPT_ARG_VAL, &preserve_specials, 1, 0, 0 },
57 {"no-specials", 0, POPT_ARG_VAL, &preserve_specials, 0, 0, 0 },
58 {"links", 'l', POPT_ARG_VAL, &preserve_links, 1, 0, 0 },
59 @@ -2626,6 +2629,9 @@ void server_options(char **args, int *argc_p)
60 else if (remove_source_files)
61 args[ac++] = "--remove-sent-files";
64 + args[ac++] = "--copy-devices";
66 if (ac > MAX_SERVER_ARGS) { /* Not possible... */
67 rprintf(FERROR, "argc overflow in server_options().\n");
68 exit_cleanup(RERR_MALLOC);
69 diff --git a/rsync.c b/rsync.c
72 @@ -33,6 +33,7 @@ extern int preserve_xattrs;
73 extern int preserve_perms;
74 extern int preserve_executability;
75 extern int preserve_times;
76 +extern int copy_devices;
80 @@ -330,7 +331,8 @@ int read_ndx_and_attrs(int f_in, int *iflag_ptr, uchar *type_ptr,
82 if (iflags & ITEM_TRANSFER) {
83 int i = ndx - cur_flist->ndx_start;
84 - if (i < 0 || !S_ISREG(cur_flist->files[i]->mode)) {
85 + struct file_struct *file = cur_flist->files[i];
86 + if (i < 0 || !(S_ISREG(file->mode) || (copy_devices && IS_DEVICE(file->mode)))) {
88 "received request to transfer non-regular file: %d [%s]\n",
90 diff --git a/sender.c b/sender.c
93 @@ -328,6 +328,20 @@ void send_files(int f_in, int f_out)
94 exit_cleanup(RERR_PROTOCOL);
97 + /* On Matt's computer, st_size is falsely 0 for most devices.
98 + * If this happens, try harder to determine the actual device size. */
99 + if (IS_DEVICE(st.st_mode) && st.st_size == 0) {
100 + OFF_T off = lseek(fd, 0, SEEK_END);
101 + if (off == (OFF_T) -1)
102 + rsyserr(FERROR, errno, "failed to seek to end of %s to determine size", fname);
105 + off = lseek(fd, 0, SEEK_SET);
107 + rsyserr(FERROR, errno, "failed to seek back to beginning of %s to read it", fname);
112 int32 read_size = MAX(s->blength * 3, MAX_MAP_SIZE);
113 mbuf = map_file(fd, st.st_size, read_size, s->blength);