From: David Bolen <db3l@fitlinxx.com>
To: Peter Tattam <peter@jazz-1.trumpet.com.au>
Cc: rsync@lists.samba.org
Subject: RE: mixed case file systems.
Date: Thu, 18 Apr 2002 23:04:06 -0400

Peter Tattam [peter@jazz-1.trumpet.com.au] writes:

> I believe a suitable workaround would be to ignore case for file names
> when the rsync process is undertaken.  Is this facility available or
> planned in the near future?

I've attached a context diff for some changes I made to our local copy
a while back to add an "--ignore-case" option just for this purpose.
In our case it came up in the context of disting between NTFS and FAT
remote systems.  I think we ended up not needing it, but it does make
rsync match filenames in a case insensitive manner, so it might at
least be worth trying to see if it resolves your issue. [NOTE: patch
updated for latest CVS source way Wayne Davison, but UNTESTED!]

A few caveats - both ends have to support the option - I couldn't make
it backwards compatible because both ends exchange information about a
sorted file list that has to sort the same way on either side (which
very subtly bit me when I first did this).  I also didn't bump the
protocol in this patch (wasn't quite sure it was appropriate just for an
incompatible command line option) since since it was for local use.

The patch is based on a 2.4.x series rsync, but if it doesn't apply
cleanly to 2.5.x, it's should be simple enough to just apply manually.

-- David

/-----------------------------------------------------------------------\
 \               David Bolen            \   E-mail: db3l@fitlinxx.com  /
  |             FitLinxx, Inc.            \  Phone: (203) 708-5192    |
 /  860 Canal Street, Stamford, CT  06902   \  Fax: (203) 316-5150     \
\-----------------------------------------------------------------------/

	  - - - - - - - - - - - - - - - - - - - - - - - - -

Index: options.c
--- options.c	22 Feb 2004 08:56:43 -0000	1.139
+++ options.c	23 Feb 2004 19:25:19 -0000
@@ -87,6 +87,7 @@ int opt_ignore_existing = 0;
 int max_delete = 0;
 int ignore_errors = 0;
 int modify_window = 0;
+int ignore_case = 0;
 int blocking_io = -1;
 int checksum_seed = 0;
 unsigned int block_size = 0;
@@ -273,6 +274,7 @@ void usage(enum logcode F)
   rprintf(F,"     --include-from=FILE     don't exclude patterns listed in FILE\n");
   rprintf(F,"     --files-from=FILE       read FILE for list of source-file names\n");
   rprintf(F," -0  --from0                 all *-from file lists are delimited by nulls\n");
+  rprintf(F,"     --ignore-case           ignore case when comparing filenames\n");
   rprintf(F,"     --version               print version number\n");
   rprintf(F,"     --daemon                run as an rsync daemon\n");
   rprintf(F,"     --no-detach             do not detach from the parent\n");
@@ -327,6 +329,7 @@ static struct poptOption long_options[] 
   {"include",          0,  POPT_ARG_STRING, 0,              OPT_INCLUDE, 0, 0 },
   {"exclude-from",     0,  POPT_ARG_STRING, 0,              OPT_EXCLUDE_FROM, 0, 0 },
   {"include-from",     0,  POPT_ARG_STRING, 0,              OPT_INCLUDE_FROM, 0, 0 },
+  {"ignore-case",      0,  POPT_ARG_NONE,   &ignore_case, 0, 0, 0 },
   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
   {"help",            'h', POPT_ARG_NONE,   0,              'h', 0, 0 },
   {"backup",          'b', POPT_ARG_NONE,   &make_backups, 0, 0, 0 },
@@ -892,6 +895,9 @@ void server_options(char **args,int *arg
 			goto oom;
 		args[ac++] = arg;
 	}
+
+	if (ignore_case)
+		args[ac++] = "--ignore-case";
 
 	if (keep_partial)
 		args[ac++] = "--partial";
Index: util.c
--- util.c	17 Feb 2004 23:13:10 -0000	1.132
+++ util.c	23 Feb 2004 19:25:20 -0000
@@ -890,6 +890,19 @@ int u_strcmp(const char *cs1, const char
 {
 	const uchar *s1 = (const uchar *)cs1;
 	const uchar *s2 = (const uchar *)cs2;
+	extern int ignore_case;
+ 	
+	if (ignore_case) {
+		while (*s1 && *s2) {
+			uchar c1 = islower(*s1) ? toupper(*s1) : *s1;
+			uchar c2 = islower(*s2) ? toupper(*s2) : *s2;
+			if (c1 != c2)
+				return c1 - c2;
+			s1++; s2++;
+		}
+
+		return (int)*s1 - (int)*s2;
+	}
 
 	while (*s1 && *s2 && (*s1 == *s2)) {
 		s1++; s2++;
Index: lib/wildmatch.c
--- lib/wildmatch.c	14 Jul 2003 15:12:59 -0000	1.12
+++ lib/wildmatch.c	23 Feb 2004 19:25:20 -0000
@@ -76,8 +76,20 @@ static int domatch(const unsigned char *
 	    ch = *++p;
 	    /* FALLTHROUGH */
 	  default:
-	    if (*text != ch)
+	    if (*text != ch) {
+		extern int ignore_case;
+		if (ignore_case) {
+		    if (ISUPPER(*text)) {
+			if (tolower(*text) == ch)
+			    continue;
+		    }
+		    else if (ISUPPER(ch)) {
+			if (*text == tolower(ch))
+			    continue;
+		    }
+		}
 		return FALSE;
+	    }
 	    continue;
 	  case '?':
 	    /* Match anything but '/'. */