1This adds the --ignore-case option, which makes rsync compare filenames
2in a case-insensitive manner.
3
4To use this patch, run these commands for a successful build:
5
6    patch -p1 <patches/ignore-case.diff
7    ./configure                            (optional if already run)
8    make
9
10--- old/flist.c
11+++ new/flist.c
12@@ -32,6 +32,7 @@ extern int am_sender;
13 extern int do_progress;
14 extern int always_checksum;
15 extern int module_id;
16+extern int ignore_case;
17 extern int ignore_errors;
18 extern int numeric_ids;
19 extern int recurse;
20@@ -1783,7 +1784,7 @@ int f_name_cmp(struct file_struct *f1, s
21 	if (type1 != type2)
22 		return type1 == t_PATH ? 1 : -1;
23 
24-	do {
25+	while (1) {
26 		if (!*c1) {
27 			switch (state1) {
28 			case s_DIR:
29@@ -1846,7 +1847,16 @@ int f_name_cmp(struct file_struct *f1, s
30 			if (type1 != type2)
31 				return type1 == t_PATH ? 1 : -1;
32 		}
33-	} while ((dif = (int)*c1++ - (int)*c2++) == 0);
34+		if (ignore_case) {
35+			uchar ch1, ch2;
36+			ch1 = islower(*c1) ? toupper(*c1) : *c1;
37+			ch2 = islower(*c2) ? toupper(*c2) : *c2;
38+			c1++, c2++;
39+			if ((dif = (int)ch1 - (int)ch2) != 0)
40+				break;
41+		} else if ((dif = (int)*c1++ - (int)*c2++) != 0)
42+			break;
43+	}
44 
45 	return dif;
46 }
47--- old/lib/wildmatch.c
48+++ new/lib/wildmatch.c
49@@ -53,6 +53,8 @@
50 #define ISUPPER(c) (ISASCII(c) && isupper(c))
51 #define ISXDIGIT(c) (ISASCII(c) && isxdigit(c))
52 
53+extern int ignore_case;
54+
55 #ifdef WILD_TEST_ITERATIONS
56 int wildmatch_iteration_count;
57 #endif
58@@ -72,6 +74,8 @@ static int dowild(const uchar *p, const 
59     for ( ; (p_ch = *p) != '\0'; text++, p++) {
60 	int matched, special;
61 	uchar t_ch, prev_ch;
62+	if (ignore_case && ISUPPER(p_ch))
63+	    p_ch = tolower(p_ch);
64 	while ((t_ch = *text) == '\0') {
65 	    if (*a == NULL) {
66 		if (p_ch != '*')
67@@ -288,10 +292,14 @@ static const uchar *trailing_N_elements(
68 int wildmatch(const char *pattern, const char *text)
69 {
70     static const uchar *nomore[1]; /* A NULL pointer. */
71+    int ret;
72 #ifdef WILD_TEST_ITERATIONS
73     wildmatch_iteration_count = 0;
74 #endif
75-    return dowild((const uchar*)pattern, (const uchar*)text, nomore) == TRUE;
76+    force_lower_case = ignore_case;
77+    ret = dowild((const uchar*)pattern, (const uchar*)text, nomore) == TRUE;
78+    force_lower_case = 0;
79+    return ret;
80 }
81 
82 /* Match the "pattern" against the forced-to-lower-case "text" string. */
83--- old/options.c
84+++ new/options.c
85@@ -111,6 +111,7 @@ OFF_T max_size = 0;
86 OFF_T min_size = 0;
87 int ignore_errors = 0;
88 int modify_window = 0;
89+int ignore_case = 0;
90 int blocking_io = -1;
91 int checksum_seed = 0;
92 int inplace = 0;
93@@ -361,6 +362,7 @@ void usage(enum logcode F)
94   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
95   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
96   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
97+  rprintf(F,"     --ignore-case           ignore case when comparing filenames\n");
98   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
99   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
100   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
101@@ -525,6 +527,7 @@ static struct poptOption long_options[] 
102   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
103   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
104   {"from0",           '0', POPT_ARG_NONE,   &eol_nulls, 0, 0, 0},
105+  {"ignore-case",      0,  POPT_ARG_NONE,   &ignore_case, 0, 0, 0 },
106   {"numeric-ids",      0,  POPT_ARG_NONE,   &numeric_ids, 0, 0, 0 },
107   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
108   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
109@@ -1688,6 +1691,9 @@ void server_options(char **args,int *arg
110 		args[ac++] = arg;
111 	}
112 
113+	if (ignore_case)
114+		args[ac++] = "--ignore-case";
115+
116 	if (partial_dir && am_sender) {
117 		if (partial_dir != tmp_partialdir) {
118 			args[ac++] = "--partial-dir";
119--- old/wildtest.c
120+++ new/wildtest.c
121@@ -32,6 +32,7 @@ int fnmatch_errors = 0;
122 #endif
123 
124 int wildmatch_errors = 0;
125+int ignore_case = 0;
126 
127 typedef char bool;
128 
129