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.
3:
4: To use this patch, run these commands for a successful build:
5:
6: patch -p1 <patches/copy-devices.diff
7: ./prepare-source
8: ./configure (optional if already run)
9: make
10:
11: based-on: e94bad1c156fc3910f24e2b3b71a81b0b0bdeb70
12: diff --git a/generator.c b/generator.c
13: --- a/generator.c
14: +++ 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 write_devices;
21: extern int preserve_specials;
22: extern int preserve_hard_links;
23: @@ -1679,7 +1680,7 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
24: goto cleanup;
25: }
26:
27: - if (!S_ISREG(file->mode)) {
28: + if (!(S_ISREG(file->mode) || (copy_devices && IS_DEVICE(file->mode)))) {
29: if (solo_file)
30: fname = f_name(file, NULL);
31: rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
32: @@ -1900,6 +1901,9 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
33: fnamecmp_type = FNAMECMP_BACKUP;
34: }
35:
36: + if (IS_DEVICE(sx.st.st_mode) && sx.st.st_size == 0)
37: + sx.st.st_size = get_device_size(fd, fnamecmp);
38: +
39: if (DEBUG_GTE(DELTASUM, 3)) {
40: rprintf(FINFO, "gen mapped %s of size %s\n",
41: fnamecmp, big_num(sx.st.st_size));
42: diff --git a/options.c b/options.c
43: --- a/options.c
44: +++ b/options.c
45: @@ -47,6 +47,7 @@ int append_mode = 0;
46: int keep_dirlinks = 0;
47: int copy_dirlinks = 0;
48: int copy_links = 0;
49: +int copy_devices = 0;
50: int write_devices = 0;
51: int preserve_links = 0;
52: int preserve_hard_links = 0;
53: @@ -652,6 +653,7 @@ static struct poptOption long_options[] = {
54: {"no-D", 0, POPT_ARG_NONE, 0, OPT_NO_D, 0, 0 },
55: {"devices", 0, POPT_ARG_VAL, &preserve_devices, 1, 0, 0 },
56: {"no-devices", 0, POPT_ARG_VAL, &preserve_devices, 0, 0, 0 },
57: + {"copy-devices", 0, POPT_ARG_NONE, ©_devices, 0, 0, 0 },
58: {"write-devices", 0, POPT_ARG_VAL, &write_devices, 1, 0, 0 },
59: {"no-write-devices", 0, POPT_ARG_VAL, &write_devices, 0, 0, 0 },
60: {"specials", 0, POPT_ARG_VAL, &preserve_specials, 1, 0, 0 },
61: @@ -942,6 +944,7 @@ static void set_refuse_options(void)
62: || strcmp("iconv", longName) == 0
63: || strcmp("no-iconv", longName) == 0
64: || strcmp("checksum-seed", longName) == 0
65: + || strcmp("copy-devices", longName) == 0 /* disable wild-match (it gets refused below) */
66: || strcmp("write-devices", longName) == 0 /* disable wild-match (it gets refused below) */
67: || strcmp("log-format", longName) == 0 /* aka out-format (NOT log-file-format) */
68: || strcmp("sender", longName) == 0
69: @@ -953,6 +956,7 @@ static void set_refuse_options(void)
70: assert(list_end != NULL);
71:
72: if (am_daemon) { /* Refused by default, but can be accepted via a negated exact match. */
73: + parse_one_refuse_match(0, "copy-devices", list_end);
74: parse_one_refuse_match(0, "write-devices", list_end);
75: }
76:
77: @@ -2895,6 +2899,9 @@ void server_options(char **args, int *argc_p)
78: else if (remove_source_files)
79: args[ac++] = "--remove-sent-files";
80:
81: + if (copy_devices)
82: + args[ac++] = "--copy-devices";
83: +
84: if (preallocate_files && am_sender)
85: args[ac++] = "--preallocate";
86:
87: diff --git a/rsync.1.md b/rsync.1.md
88: --- a/rsync.1.md
89: +++ b/rsync.1.md
90: @@ -368,6 +368,7 @@ detailed description below for a complete description.
91: --owner, -o preserve owner (super-user only)
92: --group, -g preserve group
93: --devices preserve device files (super-user only)
94: +--copy-devices copy device contents as regular file
95: --specials preserve special files
96: -D same as --devices --specials
97: --times, -t preserve modification times
98: diff --git a/rsync.c b/rsync.c
99: --- a/rsync.c
100: +++ b/rsync.c
101: @@ -33,6 +33,7 @@ extern int preserve_xattrs;
102: extern int preserve_perms;
103: extern int preserve_executability;
104: extern int preserve_times;
105: +extern int copy_devices;
106: extern int am_root;
107: extern int am_server;
108: extern int am_daemon;
109: @@ -419,7 +420,8 @@ int read_ndx_and_attrs(int f_in, int f_out, int *iflag_ptr, uchar *type_ptr, cha
110:
111: if (iflags & ITEM_TRANSFER) {
112: int i = ndx - cur_flist->ndx_start;
113: - if (i < 0 || !S_ISREG(cur_flist->files[i]->mode)) {
114: + struct file_struct *file = cur_flist->files[i];
115: + if (i < 0 || !(S_ISREG(file->mode) || (copy_devices && IS_DEVICE(file->mode)))) {
116: rprintf(FERROR,
117: "received request to transfer non-regular file: %d [%s]\n",
118: ndx, who_am_i());
119: diff --git a/rsyncd.conf.5.md b/rsyncd.conf.5.md
120: --- a/rsyncd.conf.5.md
121: +++ b/rsyncd.conf.5.md
122: @@ -930,9 +930,10 @@ the values of parameters. See the GLOBAL PARAMETERS section for more details.
123: If you are un-refusing the compress option, you probably want to match
124: "`!compress*`" so that you also accept the `--compress-level` option.
125:
126: - Note that the "write-devices" option is refused by default, but can be
127: - explicitly accepted with "`!write-devices`". The options "log-file" and
128: - "log-file-format" are forcibly refused and cannot be accepted.
129: + Note that the "copy-devices" & "write-devices" options are refused by
130: + default, but they can be explicitly accepted with "`!copy-devices`" and/or
131: + "`!write-devices`". The options "log-file" and "log-file-format" are
132: + forcibly refused and cannot be accepted.
133:
134: Here are all the options that are not matched by wild-cards:
135:
136: diff --git a/sender.c b/sender.c
137: --- a/sender.c
138: +++ b/sender.c
139: @@ -362,6 +362,9 @@ void send_files(int f_in, int f_out)
140: exit_cleanup(RERR_FILEIO);
141: }
142:
143: + if (IS_DEVICE(st.st_mode) && st.st_size == 0)
144: + st.st_size = get_device_size(fd, fname);
145: +
146: if (st.st_size) {
147: int32 read_size = MAX(s->blength * 3, MAX_MAP_SIZE);
148: mbuf = map_file(fd, st.st_size, read_size, s->blength);
149: diff -Nurp a/rsync.1 b/rsync.1
150: --- a/rsync.1
151: +++ b/rsync.1
152: @@ -444,6 +444,7 @@ detailed description below for a complet
153: --owner, -o preserve owner (super-user only)
154: --group, -g preserve group
155: --devices preserve device files (super-user only)
156: +--copy-devices copy device contents as regular file
157: --specials preserve special files
158: -D same as --devices --specials
159: --times, -t preserve modification times
160: diff -Nurp a/rsync.1.html b/rsync.1.html
161: --- a/rsync.1.html
162: +++ b/rsync.1.html
163: @@ -359,6 +359,7 @@ detailed description below for a complet
164: --owner, -o preserve owner (super-user only)
165: --group, -g preserve group
166: --devices preserve device files (super-user only)
167: +--copy-devices copy device contents as regular file
168: --specials preserve special files
169: -D same as --devices --specials
170: --times, -t preserve modification times
171: diff -Nurp a/rsyncd.conf.5 b/rsyncd.conf.5
172: --- a/rsyncd.conf.5
173: +++ b/rsyncd.conf.5
174: @@ -918,9 +918,10 @@ option.
175: If you are un-refusing the compress option, you probably want to match
176: "\fB!compress*\fP" so that you also accept the \fB\-\-compress-level\fP option.
177: .IP
178: -Note that the "write-devices" option is refused by default, but can be
179: -explicitly accepted with "\fB!write-devices\fP". The options "log-file" and
180: -"log-file-format" are forcibly refused and cannot be accepted.
181: +Note that the "copy-devices" & "write-devices" options are refused by
182: +default, but they can be explicitly accepted with "\fB!copy-devices\fP" and/or
183: +"\fB!write-devices\fP". The options "log-file" and "log-file-format" are
184: +forcibly refused and cannot be accepted.
185: .IP
186: Here are all the options that are not matched by wild-cards:
187: .IP
188: diff -Nurp a/rsyncd.conf.5.html b/rsyncd.conf.5.html
189: --- a/rsyncd.conf.5.html
190: +++ b/rsyncd.conf.5.html
191: @@ -895,9 +895,10 @@ instead of returning an error that force
192: option.</p>
193: <p>If you are un-refusing the compress option, you probably want to match
194: "<code>!compress*</code>" so that you also accept the <code>--compress-level</code> option.</p>
195: -<p>Note that the "write-devices" option is refused by default, but can be
196: -explicitly accepted with "<code>!write-devices</code>". The options "log-file" and
197: -"log-file-format" are forcibly refused and cannot be accepted.</p>
198: +<p>Note that the "copy-devices" & "write-devices" options are refused by
199: +default, but they can be explicitly accepted with "<code>!copy-devices</code>" and/or
200: +"<code>!write-devices</code>". The options "log-file" and "log-file-format" are
201: +forcibly refused and cannot be accepted.</p>
202: <p>Here are all the options that are not matched by wild-cards:</p>
203: <ul>
204: <li><code>--server</code>: Required for rsync to even work.</li>
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