From a73313e8ff269a47af6e24d28045fc264581fa10 Mon Sep 17 00:00:00 2001
From: James Jones <atari@theinnocuous.com>
Date: Wed, 26 Aug 2020 22:46:16 -0700
Subject: [PATCH] Treat ':' as a path separator on non-Windows platforms

In addition to ';', allow the use of ':' as a path
separator in RMACPATH, the -i parameter, and any
other uses of nthpath. This makes rmac more
consistent with standard Unix tool behavior on
Unix-like systems.
---
 rmac.c | 15 +++++++++++++--
 rmac.h |  3 +++
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/rmac.c b/rmac.c
index b21c1ed..26cb78e 100644
--- a/rmac.c
+++ b/rmac.c
@@ -101,6 +101,17 @@ char * fext(char * name, char * extension, int stripp)
 	return name;
 }
 
+static int is_sep(char c)
+{
+    const char *seps = PATH_SEPS;
+
+    for (seps = PATH_SEPS; *seps; seps++) {
+        if (*seps == c)
+            return 1;
+    }
+
+    return 0;
+}
 
 //
 // Return 'item'nth element of semicolon-seperated pathnames specified in the
@@ -120,13 +131,13 @@ int nthpath(char * env_var, int itemno, char * buf)
 		return 0;
 
 	while (itemno--)
-		while (*s != EOS && *s++ != ';')
+		while (*s != EOS && !is_sep(*s++))
 			;
 
 	if (*s == EOS)
 		return 0;
 
-	while (*s != EOS && *s != ';')
+	while (*s != EOS && !is_sep(*s))
 		*buf++ = *s++;
 
 	*buf++ = EOS;
diff --git a/rmac.h b/rmac.h
index 357d70e..85043b7 100644
--- a/rmac.h
+++ b/rmac.h
@@ -27,6 +27,7 @@
 	#define _OPEN_FLAGS     _O_TRUNC|_O_CREAT|_O_BINARY|_O_RDWR
 	#define _OPEN_INC       _O_RDONLY|_O_BINARY
 	#define _PERM_MODE      _S_IREAD|_S_IWRITE
+    #define PATH_SEPS       ";"
 
 	#ifdef _MSC_VER
 		#if _MSC_VER > 1000
@@ -64,6 +65,7 @@
 	#define _OPEN_FLAGS     O_TRUNC|O_CREAT|O_RDWR
 	#define _OPEN_INC       O_RDONLY
 	#define _PERM_MODE      S_IRUSR|S_IWUSR
+    #define PATH_SEPS       ";:"
 
 	#ifdef __MINGW32__
 	#define off64_t long
@@ -86,6 +88,7 @@
 	#define _OPEN_FLAGS     O_TRUNC|O_CREAT|O_RDWR
 	#define _OPEN_INC       O_RDONLY
 	#define _PERM_MODE      S_IREAD|S_IWRITE
+    #define PATH_SEPS       ":;"
 	// Defined here, even though the platform may not support it...
 	#define DO_PRAGMA(x) _Pragma (#x)
 	#define WARNING(desc) DO_PRAGMA(message (#desc))
-- 
2.26.2