- Added a lock file.

[rsync/rsync-patches.git] / backup-dir-dels.diff

This patches creates two new command line options as follows:
	--backup-dir-dels=DIR
	--suffix-dels=SUFFIX

The backup-dir-dels and suffix-dels options give the ability to store
backup of removed files on the receiver in different directories or with
different suffix than the backup of files that have been changed but that
are still on the source drive.  Both commands can be combined.

The default behaviour if one or both of the options are not specified
is the previous behaviour, both backups use the same directory or
suffix.

Marc St-Onge

To use this patch, run these commands for a successful build:

    patch -p1 <patches/backup-dir-dels.diff
    ./configure                                 (optional if already run)
    make

--- old/backup.c
+++ new/backup.c
@@ -23,10 +23,15 @@
 
 extern int verbose;
 extern int backup_dir_len;
+extern int backup_dir_dels_len;
 extern unsigned int backup_dir_remainder;
+extern unsigned int backup_dir_dels_remainder;
 extern char backup_dir_buf[MAXPATHLEN];
+extern char backup_dir_dels_buf[MAXPATHLEN];
 extern char *backup_suffix;
+extern char *backup_suffix_dels;
 extern char *backup_dir;
+extern char *backup_dir_dels;
 
 extern int am_root;
 extern int preserve_devices;
@@ -34,6 +39,8 @@ extern int preserve_specials;
 extern int preserve_links;
 extern int safe_symlinks;
 
+static int deleting;
+
 /* make a complete pathname for backup file */
 char *get_backup_name(const char *fname)
 {
@@ -51,11 +58,28 @@ char *get_backup_name(const char *fname)
 	return NULL;
 }
 
+static char *get_delete_name(const char *fname)
+{
+	if (backup_dir_dels) {
+		if (stringjoin(backup_dir_dels_buf + backup_dir_dels_len, backup_dir_dels_remainder,
+			       fname, backup_suffix_dels, NULL) < backup_dir_dels_remainder)
+			return backup_dir_dels_buf;
+	} else {
+		if (stringjoin(backup_dir_dels_buf, MAXPATHLEN,
+			       fname, backup_suffix_dels, NULL) < MAXPATHLEN)
+			return backup_dir_dels_buf;
+	}
+
+	rprintf(FERROR, "delete filename too long\n");
+	return NULL;
+}
+
 /* simple backup creates a backup with a suffix in the same directory */
 static int make_simple_backup(const char *fname)
 {
 	int rename_errno;
-	const char *fnamebak = get_backup_name(fname);
+	const char *fnamebak = deleting ? get_delete_name(fname)
+					: get_backup_name(fname);
 
 	if (!fnamebak)
 		return 0;
@@ -95,7 +119,8 @@ path
 static int make_bak_dir(char *fullpath)
 {
 	STRUCT_STAT st;
-	char *rel = fullpath + backup_dir_len;
+	int dir_len = deleting ? backup_dir_dels_len : backup_dir_len;
+	char *rel = fullpath + dir_len;
 	char *end = rel + strlen(rel);
 	char *p = end;
 
@@ -185,7 +210,8 @@ static int keep_backup(const char *fname
 	if (!(file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
 		return 1; /* the file could have disappeared */
 
-	if (!(buf = get_backup_name(fname)))
+	buf = deleting ? get_delete_name(fname) : get_backup_name(fname);
+	if (!buf)
 		return 0;
 
 	/* Check to see if this is a device file, or link */
@@ -280,3 +306,13 @@ int make_backup(const char *fname)
 		return keep_backup(fname);
 	return make_simple_backup(fname);
 }
+
+/* backup switch routine called only when backing-up removed file */
+int safe_delete(char *fname)
+{
+	int ret;
+	deleting = 1;
+	ret = make_backup(fname);
+	deleting = 0;
+	return ret;
+}
--- old/generator.c
+++ new/generator.c
@@ -90,6 +90,9 @@ extern dev_t filesystem_dev;
 extern char *backup_dir;
 extern char *backup_suffix;
 extern int backup_suffix_len;
+extern char *backup_dir_dels;
+extern char *backup_suffix_dels;
+extern int backup_suffix_dels_len;
 extern struct file_list *the_file_list;
 extern struct filter_list_struct server_filter_list;
 
@@ -115,10 +118,14 @@ enum delret {
 static enum delret delete_dir_contents(char *fname, int flags);
 
 
+/* Function now compares both backup_suffix and backup_suffix_dels. */
 static int is_backup_file(char *fn)
 {
 	int k = strlen(fn) - backup_suffix_len;
-	return k > 0 && strcmp(fn+k, backup_suffix) == 0;
+	if (k > 0 && strcmp(fn+k, backup_suffix) == 0)
+		return 1;
+	k += backup_suffix_len - backup_suffix_dels_len;
+	return k > 0 && strcmp(fn+k, backup_suffix_dels) == 0;
 }
 
 /* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
@@ -154,9 +161,9 @@ static enum delret delete_item(char *fbu
 	if (S_ISDIR(mode)) {
 		what = "rmdir";
 		ok = do_rmdir(fbuf) == 0;
-	} else if (make_backups && (backup_dir || !is_backup_file(fbuf))) {
+	} else if (make_backups && (backup_dir_dels || !is_backup_file(fbuf))) {
 		what = "make_backup";
-		ok = make_backup(fbuf);
+		ok = safe_delete(fbuf);
 	} else {
 		what = "unlink";
 		ok = robust_unlink(fbuf) == 0;
--- old/options.c
+++ new/options.c
@@ -138,10 +138,14 @@ int no_detach
 int write_batch = 0;
 int read_batch = 0;
 int backup_dir_len = 0;
+int backup_dir_dels_len = 0;	
 int backup_suffix_len;
+int backup_suffix_dels_len;
 unsigned int backup_dir_remainder;
+unsigned int backup_dir_dels_remainder;
 
 char *backup_suffix = NULL;
+char *backup_suffix_dels = NULL;
 char *tmpdir = NULL;
 char *partial_dir = NULL;
 char *basis_dir[MAX_BASIS_DIRS+1];
@@ -153,7 +157,9 @@ char *stdout_format = NULL;
 char *password_file = NULL;
 char *rsync_path = RSYNC_PATH;
 char *backup_dir = NULL;
+char *backup_dir_dels = NULL;
 char backup_dir_buf[MAXPATHLEN];
+char backup_dir_dels_buf[MAXPATHLEN];
 char *sockopts = NULL;
 int rsync_port = 0;
 int compare_dest = 0;
@@ -288,6 +294,8 @@ void usage(enum logcode F)
   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
+  rprintf(F,"     --backup-dir-dels       make backups of removed files into current dir\n");
+  rprintf(F,"     --suffix-dels=SUFFIX    set removed-files suffix (defaults to --suffix)\n");
   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
   rprintf(F,"     --append                append data onto shorter files\n");
@@ -516,7 +524,9 @@ static struct poptOption long_options[] 
   {"bwlimit",          0,  POPT_ARG_INT,    &bwlimit, 0, 0, 0 },
   {"backup",          'b', POPT_ARG_NONE,   &make_backups, 0, 0, 0 },
   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
+  {"backup-dir-dels",  0,  POPT_ARG_STRING, &backup_dir_dels, 0, 0, 0 },
   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
+  {"suffix-dels",      0,  POPT_ARG_STRING, &backup_suffix_dels, 0, 0, 0 },
   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
@@ -1230,6 +1240,8 @@ int parse_arguments(int *argc, const cha
 			tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, NULL);
 		if (backup_dir)
 			backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, NULL);
+		if (backup_dir_dels)
+			backup_dir_dels = sanitize_path(NULL, backup_dir_dels, NULL, 0, NULL);
 	}
 	if (server_filter_list.head && !am_sender) {
 		struct filter_list_struct *elp = &server_filter_list;
@@ -1247,6 +1259,14 @@ int parse_arguments(int *argc, const cha
 			if (check_filter(elp, backup_dir, 1) < 0)
 				goto options_rejected;
 		}
+		/* Clean backup_dir_dels same as for backup_dir */
+		if (backup_dir_dels) {
+			if (!*backup_dir_dels)
+				goto options_rejected;
+			clean_fname(backup_dir_dels, 1);
+			if (check_filter(elp, backup_dir_dels, 1) < 0)
+				goto options_rejected;
+		}
 	}
 
 	if (!backup_suffix)
@@ -1258,6 +1278,16 @@ int parse_arguments(int *argc, const cha
 			backup_suffix);
 		return 0;
 	}
+	/* if backup_suffix_dels not supplied, default to backup_suffix */
+	if (!backup_suffix_dels)
+		backup_suffix_dels = backup_dir_dels ? "" : backup_suffix;
+	backup_suffix_dels_len = strlen(backup_suffix_dels);
+	if (strchr(backup_suffix_dels, '/') != NULL) {
+		snprintf(err_buf, sizeof err_buf,
+			"--suffix-dels cannot contain slashes: %s\n",
+			backup_suffix_dels);	
+		return 0;
+	}
 	if (backup_dir) {
 		backup_dir_len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
 		backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
@@ -1281,6 +1311,31 @@ int parse_arguments(int *argc, const cha
 			"P *%s", backup_suffix);
 		parse_rule(&filter_list, backup_dir_buf, 0, 0);
 	}
+	/* If backup_dir_dels not supplied default to backup_dir if it has been supplied */
+	if (backup_dir && !backup_dir_dels) {
+		backup_dir_dels = backup_dir;
+		backup_dir_dels_len = backup_dir_len;
+		backup_dir_dels_remainder = backup_dir_remainder;
+		strlcpy(backup_dir_dels_buf, backup_dir_buf, sizeof backup_dir_buf);
+	} else if (backup_dir_dels) {
+		backup_dir_dels_len = strlcpy(backup_dir_dels_buf, backup_dir_dels, sizeof backup_dir_dels_buf);
+		backup_dir_dels_remainder = sizeof backup_dir_dels_buf - backup_dir_dels_len;
+		if (backup_dir_dels_remainder < 32) {
+			snprintf(err_buf, sizeof err_buf,
+				"the --backup-dir-dels path is WAY too long.\n");
+			return 0;
+		}
+		if (backup_dir_dels_buf[backup_dir_dels_len - 1] != '/') {
+			backup_dir_dels_buf[backup_dir_dels_len++] = '/';
+			backup_dir_dels_buf[backup_dir_dels_len] = '\0';
+		}
+		if (verbose > 1 && !am_sender)
+			rprintf(FINFO, "backup_dir_dels is %s\n", backup_dir_dels_buf);
+	} else if (!backup_suffix_dels_len && (!am_server || !am_sender)) {
+		snprintf(err_buf, sizeof err_buf,
+			"--suffix-dels cannot be a null string without --backup-dir-dels\n");
+		return 0;
+	}
 	if (make_backups && !backup_dir)
 		omit_dir_times = 1;
 
@@ -1645,6 +1700,10 @@ void server_options(char **args,int *arg
 		args[ac++] = "--backup-dir";
 		args[ac++] = backup_dir;
 	}
+	if (backup_dir_dels && backup_dir_dels != backup_dir) {
+		args[ac++] = "--backup-dir-dels";
+		args[ac++] = backup_dir_dels;
+	}
 
 	/* Only send --suffix if it specifies a non-default value. */
 	if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
@@ -1653,7 +1712,13 @@ void server_options(char **args,int *arg
 			goto oom;
 		args[ac++] = arg;
 	}
-
+	/* Only send --suffix-dels if it specifies a non-default value. */
+	if (strcmp(backup_suffix_dels, backup_dir_dels ? "" : BACKUP_SUFFIX) != 0) {
+		/* We use the following syntax to avoid weirdness with '~'. */
+		if (asprintf(&arg, "--suffix-dels=%s", backup_suffix_dels) < 0)
+			goto oom;
+		args[ac++] = arg;
+	}
 	if (am_sender) {
 		if (delete_excluded)
 			args[ac++] = "--delete-excluded";