[PATCH] --link-dest option
jw schultz
jw at pegasys.ws
Fri Mar 22 10:41:52 EST 2002
Please CC me. I'm not subscribed.
Attached is a patch against 2.5.4pre1 CVS current to add the
--link-dest option so rsync will create hardlinks for
unchanged regular files to a directory on the destination.
This is like --compare-dest except that the result is not a
sparse tree.
Also included is extension to --(ex|in)clude-from to allow -
for stdin.
Could one of the maintainers please add this to the
mainline?
Thanks to Dave Dykstra for feedback on this.
--
________________________________________________________________
J.W. Schultz Pegasystems Technologies
email address: jw at pegasys.ws
Remember Cernan and Schmitt
-------------- next part --------------
? options-merge.c
Index: exclude.c
===================================================================
RCS file: /cvsroot/rsync/exclude.c,v
retrieving revision 1.42
diff -u -r1.42 exclude.c
--- exclude.c 18 Feb 2002 19:10:28 -0000 1.42
+++ exclude.c 21 Mar 2002 23:31:25 -0000
@@ -219,8 +219,14 @@
int fatal, int include)
{
struct exclude_struct **list=list1;
- FILE *f = fopen(fname,"r");
+ FILE *f;
char line[MAXPATHLEN];
+
+ if (strcmp(fname, "-")) {
+ f = fopen(fname,"r");
+ } else {
+ f = fdopen(0, "r");
+ }
if (!f) {
if (fatal) {
rsyserr(FERROR, errno,
Index: generator.c
===================================================================
RCS file: /cvsroot/rsync/generator.c,v
retrieving revision 1.37
diff -u -r1.37 generator.c
--- generator.c 19 Mar 2002 20:16:42 -0000 1.37
+++ generator.c 21 Mar 2002 23:31:26 -0000
@@ -41,6 +41,7 @@
extern int always_checksum;
extern int modify_window;
extern char *compare_dest;
+extern int link_dest;
/* choose whether to skip a particular file */
@@ -50,6 +51,15 @@
if (st->st_size != file->length) {
return 0;
}
+ if (link_dest) {
+ if((st->st_mode & ~_S_IFMT) != (file->mode & ~_S_IFMT)) {
+ return 0;
+ }
+ if (st->st_uid != file->uid || st->st_gid != file->gid) {
+ return 0;
+ }
+ }
+
/* if always checksum is set then we use the checksum instead
of the file time to determine whether to sync */
@@ -382,6 +392,17 @@
statret = -1;
if (statret == -1)
errno = saveerrno;
+#if HAVE_LINK
+ else if (link_dest)
+ if (do_link(fnamecmpbuf, fname) != 0) {
+ if (verbose > 0)
+ rprintf(FINFO,"link %s => %s : %s\n",
+ fnamecmpbuf,
+ fname,
+ strerror(errno));
+ fnamecmp = fnamecmpbuf;
+ }
+#endif
else
fnamecmp = fnamecmpbuf;
}
Index: options.c
===================================================================
RCS file: /cvsroot/rsync/options.c,v
retrieving revision 1.89
diff -u -r1.89 options.c
--- options.c 19 Mar 2002 20:16:42 -0000 1.89
+++ options.c 21 Mar 2002 23:31:27 -0000
@@ -113,6 +113,7 @@
char *rsync_path = RSYNC_PATH;
char *backup_dir = NULL;
int rsync_port = RSYNC_PORT;
+int link_dest = 0;
int verbose = 0;
int quiet = 0;
@@ -282,7 +283,7 @@
OPT_EXCLUDE_FROM, OPT_DELETE, OPT_DELETE_EXCLUDED, OPT_NUMERIC_IDS,
OPT_RSYNC_PATH, OPT_FORCE, OPT_TIMEOUT, OPT_DAEMON, OPT_CONFIG, OPT_PORT,
OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_STATS, OPT_PARTIAL, OPT_PROGRESS,
- OPT_COPY_UNSAFE_LINKS, OPT_SAFE_LINKS, OPT_COMPARE_DEST,
+ OPT_COPY_UNSAFE_LINKS, OPT_SAFE_LINKS, OPT_COMPARE_DEST, OPT_LINK_DEST,
OPT_LOG_FORMAT, OPT_PASSWORD_FILE, OPT_SIZE_ONLY, OPT_ADDRESS,
OPT_DELETE_AFTER, OPT_EXISTING, OPT_MAX_DELETE, OPT_BACKUP_DIR,
OPT_IGNORE_ERRORS, OPT_BWLIMIT, OPT_BLOCKING_IO,
@@ -341,6 +342,7 @@
{"timeout", 0, POPT_ARG_INT, &io_timeout , 0, 0, 0 },
{"temp-dir", 'T', POPT_ARG_STRING, &tmpdir , 0, 0, 0 },
{"compare-dest", 0, POPT_ARG_STRING, &compare_dest , 0, 0, 0 },
+ {"link-dest", 0, POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
/* TODO: Should this take an optional int giving the compression level? */
{"compress", 'z', POPT_ARG_NONE, &do_compression , 0, 0, 0 },
{"daemon", 0, POPT_ARG_NONE, &am_daemon , 0, 0, 0 },
@@ -562,6 +564,19 @@
/* popt stores the filename in batch_prefix for us */
read_batch = 1;
break;
+ case OPT_LINK_DEST:
+#if HAVE_LINK
+ compare_dest = poptGetOptArg(pc);
+ link_dest = 1;
+ break;
+#else
+ snprintf(err_buf,sizeof(err_buf),
+ "hard links are not supported on this %s\n",
+ am_server ? "server" : "client");
+ rprintf(FERROR,"ERROR: hard links not supported on this platform\n");
+ return 0;
+#endif
+
default:
/* FIXME: If --daemon is specified, then errors for later
@@ -785,7 +800,7 @@
* and it may be an older version that doesn't know this
* option, so don't send it if client is the sender.
*/
- args[ac++] = "--compare-dest";
+ args[ac++] = link_dest ? "--link-dest" : "--compare-dest";
args[ac++] = compare_dest;
}
Index: rsync.yo
===================================================================
RCS file: /cvsroot/rsync/rsync.yo,v
retrieving revision 1.95
diff -u -r1.95 rsync.yo
--- rsync.yo 6 Feb 2002 21:20:49 -0000 1.95
+++ rsync.yo 21 Mar 2002 23:31:28 -0000
@@ -261,6 +261,7 @@
--modify-window=NUM Timestamp window (seconds) for file match (default=0)
-T --temp-dir=DIR create temporary files in directory DIR
--compare-dest=DIR also compare destination files relative to DIR
+ --link-dest=DIR create hardlinks to DIR for unchanged files
-P equivalent to --partial --progress
-z, --compress compress file data
--exclude=PATTERN exclude files matching PATTERN
@@ -531,6 +532,7 @@
option, but instead it adds all exclude patterns listed in the file
FILE to the exclude list. Blank lines in FILE and lines starting with
';' or '#' are ignored.
+If \fIFILE\fP is \fB-\fP the list will be read from standard input.
dit(bf(--include=PATTERN)) This option tells rsync to not exclude the
specified pattern of filenames. This is useful as it allows you to
@@ -541,6 +543,7 @@
dit(bf(--include-from=FILE)) This specifies a list of include patterns
from a file.
+If \fIFILE\fP is \fB-\fP the list will be read from standard input.
dit(bf(-C, --cvs-exclude)) This is a useful shorthand for excluding a
broad range of files that you often don't want to transfer between
@@ -595,6 +598,11 @@
--partial because partially transferred files will remain in the new
temporary destination until they have a chance to be completed. If DIR is
a relative path, it is relative to the destination directory.
+
+dit(bf(--link-dest=DIR)) This option behaves like \fB--compare-dest\fP but
+also will create hard links from \fIDIR\fP to the destination directory for
+unchanged files. Files with changed ownership or permissions will not be
+linked.
dit(bf(-z, --compress)) With this option, rsync compresses any data from
the files that it sends to the destination machine. This
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