Commit | Line | Data |
---|---|---|
c0c7984e WD |
1 | This patch implements a new --remote-option (-M) option that allows the |
2 | user to override certain settings on the remote system. For instance, it | |
3 | is now easier to pass -M--fake-super or "-M --log-file=/tmp/foo" instead of | |
4 | kluging up an --rsync-path setting. This also solves the case where we | |
5 | want local --one-file-system (-x) but not remote ("-x -M--no-x"), or visa | |
6 | versa ("-M-x"). | |
7 | ||
8 | To use this patch, run these commands for a successful build: | |
9 | ||
10 | patch -p1 <patches/remote-option.diff | |
11 | ./configure (optional if already run) | |
12 | make | |
13 | ||
14 | diff --git a/options.c b/options.c | |
15 | --- a/options.c | |
16 | +++ b/options.c | |
17 | @@ -174,6 +174,10 @@ int link_dest = 0; | |
18 | int basis_dir_cnt = 0; | |
19 | char *dest_option = NULL; | |
20 | ||
cbdf862c | 21 | +static int remote_option_alloc = 0; |
c0c7984e | 22 | +int remote_option_cnt = 0; |
cbdf862c | 23 | +const char **remote_options = NULL; |
c0c7984e WD |
24 | + |
25 | int verbose = 0; | |
26 | int quiet = 0; | |
27 | int output_motd = 1; | |
abd3adb8 | 28 | @@ -388,6 +392,7 @@ void usage(enum logcode F) |
c0c7984e WD |
29 | rprintf(F," --timeout=SECONDS set I/O timeout in seconds\n"); |
30 | rprintf(F," --contimeout=SECONDS set daemon connection timeout in seconds\n"); | |
31 | rprintf(F," -I, --ignore-times don't skip files that match in size and mod-time\n"); | |
32 | + rprintf(F," -M, --remote-option=OPTION send OPTION to the remote side only\n"); | |
33 | rprintf(F," --size-only skip files that match in size\n"); | |
34 | rprintf(F," --modify-window=NUM compare mod-times with reduced accuracy\n"); | |
35 | rprintf(F," -T, --temp-dir=DIR create temporary files in directory DIR\n"); | |
abd3adb8 | 36 | @@ -646,6 +651,7 @@ static struct poptOption long_options[] = { |
c0c7984e WD |
37 | {"password-file", 0, POPT_ARG_STRING, &password_file, 0, 0, 0 }, |
38 | {"blocking-io", 0, POPT_ARG_VAL, &blocking_io, 1, 0, 0 }, | |
39 | {"no-blocking-io", 0, POPT_ARG_VAL, &blocking_io, 0, 0, 0 }, | |
40 | + {"remote-option", 'M', POPT_ARG_STRING, 0, 'M', 0, 0 }, | |
41 | {"protocol", 0, POPT_ARG_INT, &protocol_version, 0, 0, 0 }, | |
42 | {"checksum-seed", 0, POPT_ARG_INT, &checksum_seed, 0, 0, 0 }, | |
43 | {"server", 0, POPT_ARG_NONE, 0, OPT_SERVER, 0, 0 }, | |
abd3adb8 | 44 | @@ -1141,6 +1147,26 @@ int parse_arguments(int *argc_p, const char ***argv_p) |
c0c7984e WD |
45 | } |
46 | break; | |
47 | ||
48 | + case 'M': | |
49 | + arg = poptGetOptArg(pc); | |
50 | + if (*arg != '-') { | |
51 | + snprintf(err_buf, sizeof err_buf, | |
52 | + "Remote option must start with a dash: %s\n", arg); | |
53 | + return 0; | |
54 | + } | |
e2e42a01 | 55 | + if (remote_option_cnt+2 >= remote_option_alloc) { |
cbdf862c WD |
56 | + remote_option_alloc += 16; |
57 | + remote_options = realloc_array(remote_options, | |
58 | + const char *, remote_option_alloc); | |
59 | + if (!remote_options) | |
60 | + out_of_memory("parse_arguments"); | |
61 | + if (!remote_option_cnt) | |
62 | + remote_options[0] = "ARG0"; | |
c0c7984e WD |
63 | + } |
64 | + remote_options[++remote_option_cnt] = arg; | |
cbdf862c | 65 | + remote_options[remote_option_cnt+1] = NULL; |
c0c7984e WD |
66 | + break; |
67 | + | |
68 | case OPT_WRITE_BATCH: | |
69 | /* batch_name is already set */ | |
70 | write_batch = 1; | |
abd3adb8 | 71 | @@ -2063,6 +2089,16 @@ void server_options(char **args, int *argc_p) |
c0c7984e WD |
72 | else if (remove_source_files) |
73 | args[ac++] = "--remove-sent-files"; | |
74 | ||
c0c7984e WD |
75 | + if (remote_option_cnt) { |
76 | + int j; | |
77 | + if (ac + remote_option_cnt > MAX_SERVER_ARGS) { | |
78 | + rprintf(FERROR, "too many remote options specified.\n"); | |
79 | + exit_cleanup(RERR_SYNTAX); | |
80 | + } | |
81 | + for (j = 1; j <= remote_option_cnt; j++) | |
82 | + args[ac++] = (char*)remote_options[j]; | |
83 | + } | |
84 | + | |
ae306a29 WD |
85 | if (ac > MAX_SERVER_ARGS) { /* Not possible... */ |
86 | rprintf(FERROR, "argc overflow in server_options().\n"); | |
87 | exit_cleanup(RERR_MALLOC); | |
c0c7984e WD |
88 | diff --git a/pipe.c b/pipe.c |
89 | --- a/pipe.c | |
90 | +++ b/pipe.c | |
cbdf862c | 91 | @@ -28,6 +28,8 @@ extern int blocking_io; |
c0c7984e WD |
92 | extern int filesfrom_fd; |
93 | extern mode_t orig_umask; | |
94 | extern char *logfile_name; | |
95 | +extern int remote_option_cnt; | |
cbdf862c | 96 | +extern const char **remote_options; |
c0c7984e WD |
97 | extern struct chmod_mode_struct *chmod_modes; |
98 | ||
99 | /** | |
cbdf862c | 100 | @@ -139,6 +141,15 @@ pid_t local_child(int argc, char **argv, int *f_in, int *f_out, |
c0c7984e WD |
101 | logfile_close(); |
102 | } | |
103 | ||
c0c7984e WD |
104 | + if (remote_option_cnt) { |
105 | + int rc = remote_option_cnt + 1; | |
106 | + const char **rv = remote_options; | |
107 | + if (!parse_arguments(&rc, &rv)) { | |
108 | + option_error(); | |
109 | + exit_cleanup(RERR_SYNTAX); | |
110 | + } | |
111 | + } | |
112 | + | |
113 | if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 || | |
114 | close(to_child_pipe[1]) < 0 || | |
115 | close(from_child_pipe[0]) < 0 || | |
116 | diff --git a/rsync.yo b/rsync.yo | |
117 | --- a/rsync.yo | |
118 | +++ b/rsync.yo | |
abd3adb8 | 119 | @@ -416,6 +416,7 @@ to the detailed description below for a complete description. verb( |
c0c7984e WD |
120 | --progress show progress during transfer |
121 | -P same as --partial --progress | |
122 | -i, --itemize-changes output a change-summary for all updates | |
123 | + -M, --remote-option=OPTION send OPTION to the remote side only | |
124 | --out-format=FORMAT output updates using the specified FORMAT | |
125 | --log-file=FILE log what we're doing to the specified FILE | |
126 | --log-file-format=FMT log updates using the specified FMT | |
abd3adb8 | 127 | @@ -1030,16 +1031,16 @@ This is a good way to backup data without using a super-user, and to store |
c0c7984e WD |
128 | ACLs from incompatible systems. |
129 | ||
130 | The bf(--fake-super) option only affects the side where the option is used. | |
131 | -To affect the remote side of a remote-shell connection, specify an rsync | |
132 | -path: | |
133 | +To affect the remote side of a remote-shell connection, use the | |
134 | +bf(--remote-option) (bf(-M)) option: | |
135 | ||
136 | -quote(tt( rsync -av --rsync-path="rsync --fake-super" /src/ host:/dest/)) | |
137 | +quote(tt( rsync -av -M--fake-super /src/ host:/dest/)) | |
138 | ||
139 | -Since there is only one "side" in a local copy, this option affects both | |
140 | -the sending and receiving of files. You'll need to specify a copy using | |
141 | -"localhost" if you need to avoid this, possibly using the "lsh" shell | |
142 | -script (from the support directory) as a substitute for an actual remote | |
143 | -shell (see bf(--rsh)). | |
cbdf862c WD |
144 | +For a local copy, this option affects both the source and the destination. |
145 | +If you wish a local copy to enable this option just for the destination | |
146 | +files, specify bf(-M--fake-super). If you wish a local copy to enable | |
147 | +this option just for the source files, combine bf(--fake-super) with | |
148 | +bf(-M--super). | |
c0c7984e WD |
149 | |
150 | This option is overridden by both bf(--super) and bf(--no-super). | |
151 | ||
abd3adb8 | 152 | @@ -1292,6 +1293,36 @@ machine for use with the bf(--relative) option. For instance: |
c0c7984e WD |
153 | |
154 | quote(tt( rsync -avR --rsync-path="cd /a/b && rsync" host:c/d /e/)) | |
155 | ||
156 | +dit(bf(-M, --remote-option=OPTION)) This option is used for more advanced | |
157 | +situations where you want certain effects to be limited to one side of the | |
158 | +transfer only. For instance, if you want to pass bf(--log-file=FILE) and | |
159 | +bf(--fake-super) to the remote system, specify it like this: | |
160 | + | |
161 | +quote(tt( rsync -av -M --log-file=foo -M--fake-super src/ dest/)) | |
162 | + | |
163 | +If you want to have an option affect only the local side of a transfer when | |
164 | +it normally affects both sides, send its negation to the remote side. Like | |
165 | +this: | |
166 | + | |
167 | +quote(tt( rsync -av -x -M--no-x src/ dest/)) | |
168 | + | |
169 | +Be cautious using this, as it is possible to toggle an option that will cause | |
170 | +rsync to have a different idea about what data to expect next over the socket, | |
171 | +and that will make it fail in a cryptic fashion. | |
172 | + | |
173 | +Note that it is best to use a separate bf(--remote-option) for each option you | |
cbdf862c | 174 | +want to pass. This makes your useage compatible with the bf(--protect-args) |
c0c7984e WD |
175 | +option. If that option is off, any spaces in your remote options will be split |
176 | +by the remote shell unless you take steps to protect them. | |
177 | + | |
178 | +When performing a local transfer, the "local" side is the sender and the | |
179 | +"remote" side is the receiver. | |
180 | + | |
181 | +Note some versions of the popt option-parsing library have a bug in them that | |
182 | +prevents you from using an adjacent arg with an equal in it next to a short | |
183 | +option letter (e.g. tt(-M--log-file=/tmp/foo). If this bug affects your | |
184 | +version of popt, you can use the version of popt that is included with rsync. | |
185 | + | |
186 | dit(bf(-C, --cvs-exclude)) This is a useful shorthand for excluding a | |
187 | broad range of files that you often don't want to transfer between | |
188 | systems. It uses a similar algorithm to CVS to determine if | |
abd3adb8 | 189 | @@ -1768,7 +1799,7 @@ option if you wish to override this. |
c0c7984e WD |
190 | Here's a example command that requests the remote side to log what is |
191 | happening: | |
192 | ||
193 | -verb( rsync -av --rsync-path="rsync --log-file=/tmp/rlog" src/ dest/) | |
194 | +verb( rsync -av --remote-option=--log-file=/tmp/rlog src/ dest/) | |
195 | ||
196 | This is very useful if you need to debug why a connection is closing | |
197 | unexpectedly. |