Apply case insensitive patch

config.h

@@ -0,0 +1,23 @@
+/* See LICENSE file for copyright and license details. */
+/* Default settings; can be overriden by command line. */
+
+static int topbar = 1;                      /* -b  option; if 0, dmenu appears at bottom     */
+/* -fn option overrides fonts[0]; default X11 font or font set */
+static const char *fonts[] = {
+	"monospace:size=10"
+};
+static const char *prompt      = NULL;      /* -p  option; prompt to the left of input field */
+static const char *colors[SchemeLast][2] = {
+	/*     fg         bg       */
+	[SchemeNorm] = { "#bbbbbb", "#222222" },
+	[SchemeSel] = { "#eeeeee", "#005577" },
+	[SchemeOut] = { "#000000", "#00ffff" },
+};
+/* -l option; if nonzero, dmenu uses vertical list with given number of lines */
+static unsigned int lines      = 0;
+
+/*
+ * Characters not considered part of a word while deleting words
+ * for example: " /?\"&[]"
+ */
+static const char worddelimiters[] = " ";

dmenu.c

@@ -55,8 +55,9 @@ static Clr *scheme[SchemeLast];
 
 #include "config.h"
 
-static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
-static char *(*fstrstr)(const char *, const char *) = strstr;
+static char * cistrstr(const char *s, const char *sub);
+static int (*fstrncmp)(const char *, const char *, size_t) = strncasecmp;
+static char *(*fstrstr)(const char *, const char *) = cistrstr;
 
 static void
 appenditem(struct item *item, struct item **list, struct item **last)
@@ -709,9 +710,9 @@ main(int argc, char *argv[])
 			topbar = 0;
 		else if (!strcmp(argv[i], "-f"))   /* grabs keyboard before reading stdin */
 			fast = 1;
-		else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
-			fstrncmp = strncasecmp;
-			fstrstr = cistrstr;
+		else if (!strcmp(argv[i], "-s")) { /* case-sensitive item matching */
+			fstrncmp = strncmp;
+			fstrstr = strstr;
 		} else if (i + 1 == argc)
 			usage();
 		/* these options take one argument */

patches/dmenu-caseinsensitive-20200523-db6093f.diff

@@ -0,0 +1,42 @@
+From 54acbdf72083a5eae5783eed42e162424ab2cec2 Mon Sep 17 00:00:00 2001
+From: Kim Torgersen <kim@torgersen.se>
+Date: Sat, 23 May 2020 14:48:28 +0200
+Subject: [PATCH] case-insensitive item matching default, case-sensitive option
+ (-s)
+
+---
+ dmenu.c | 11 ++++++-----
+ 1 file changed, 6 insertions(+), 5 deletions(-)
+
+diff --git a/dmenu.c b/dmenu.c
+index 65f25ce..855df59 100644
+--- a/dmenu.c
++++ b/dmenu.c
+@@ -55,8 +55,9 @@ static Clr *scheme[SchemeLast];
+ 
+ #include "config.h"
+ 
+-static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
+-static char *(*fstrstr)(const char *, const char *) = strstr;
++static char * cistrstr(const char *s, const char *sub);
++static int (*fstrncmp)(const char *, const char *, size_t) = strncasecmp;
++static char *(*fstrstr)(const char *, const char *) = cistrstr;
+ 
+ static void
+ appenditem(struct item *item, struct item **list, struct item **last)
+@@ -709,9 +710,9 @@ main(int argc, char *argv[])
+ 			topbar = 0;
+ 		else if (!strcmp(argv[i], "-f"))   /* grabs keyboard before reading stdin */
+ 			fast = 1;
+-		else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
+-			fstrncmp = strncasecmp;
+-			fstrstr = cistrstr;
++		else if (!strcmp(argv[i], "-s")) { /* case-sensitive item matching */
++			fstrncmp = strncmp;
++			fstrstr = strstr;
+ 		} else if (i + 1 == argc)
+ 			usage();
+ 		/* these options take one argument */
+-- 
+2.26.2
+