From 0ad5165cf249826f13330c69e205f9a5dcc23933 Mon Sep 17 00:00:00 2001
From: insofaras <iaminsofaras@gmail.com>
Date: Thu, 1 Sep 2016 20:30:09 +0100
Subject: [PATCH 1/2] linux manual impl of get_canonical to handle non-existent
 paths

---
 linux_4ed.cpp | 49 ++++++++++++++++++++++++++++++++++---------------
 1 file changed, 34 insertions(+), 15 deletions(-)

diff --git a/linux_4ed.cpp b/linux_4ed.cpp
index fe608308..89a3c594 100644
--- a/linux_4ed.cpp
+++ b/linux_4ed.cpp
@@ -499,26 +499,45 @@ Sys_Set_File_List_Sig(system_set_file_list){
 
 internal
 Sys_Get_Canonical_Sig(system_get_canonical){
-    int32_t result = 0;
+    char* path = (char*) alloca(len + 1);
+    char* write_p = path;
+    const char* read_p = filename;
 
-    char* path = realpath(strndupa(filename, len), NULL);
-    if(path){
-        size_t path_len = strlen(path);
-        if(max >= path_len){
-            memcpy(buffer, path, path_len);
-            result = path_len;
+    while(read_p < filename + len){
+        if(read_p == filename || read_p[0] == '/'){
+			if(read_p[1] == '/'){
+				++read_p;
+			} else if(read_p[1] == '.'){
+				if(read_p[2] == '/' || !read_p[2]){
+					read_p += 2;
+				} else if(read_p[2] == '.' && (read_p[3] == '/' || !read_p[3])){
+					while(write_p > path && *--write_p != '/');
+					read_p += 3;
+				} else {
+					*write_p++ = *read_p++;
+				}
+			} else {
+				*write_p++ = *read_p++;
+			}
+        } else {
+            *write_p++ = *read_p++;
         }
-#if FRED_INTERNAL
-        if(strncmp(filename, path, len) != 0){
-            LINUX_FN_DEBUG("[%.*s] -> [%s]", len, filename, path);
-        }
-#endif
-        free(path);
+    }
+	if(write_p == path) *write_p++ = '/';
+
+    if(max >= (write_p - path)){
+        memcpy(buffer, path, write_p - path);
     } else {
-        LINUX_FN_DEBUG("[%.*s] -> [null]", len, filename);
+        write_p = path;
     }
 
-    return result;
+#if FRED_INTERNAL
+    if(len != (write_p - path) || memcmp(filename, path, len) != 0){
+        LINUX_FN_DEBUG("[%.*s] -> [%.*s]", len, filename, (int)(write_p - path), path);
+    }
+#endif
+
+    return write_p - path;
 }
 
 internal

From f3a6b15deccbcdd7de68a13adbea06018c1ac602 Mon Sep 17 00:00:00 2001
From: insofaras <iaminsofaras@gmail.com>
Date: Thu, 1 Sep 2016 20:33:42 +0100
Subject: [PATCH 2/2] i messed up tabs/spaces again fml

---
 linux_4ed.cpp | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/linux_4ed.cpp b/linux_4ed.cpp
index 89a3c594..4ca984cb 100644
--- a/linux_4ed.cpp
+++ b/linux_4ed.cpp
@@ -505,25 +505,25 @@ Sys_Get_Canonical_Sig(system_get_canonical){
 
     while(read_p < filename + len){
         if(read_p == filename || read_p[0] == '/'){
-			if(read_p[1] == '/'){
-				++read_p;
-			} else if(read_p[1] == '.'){
-				if(read_p[2] == '/' || !read_p[2]){
-					read_p += 2;
-				} else if(read_p[2] == '.' && (read_p[3] == '/' || !read_p[3])){
-					while(write_p > path && *--write_p != '/');
-					read_p += 3;
-				} else {
-					*write_p++ = *read_p++;
-				}
-			} else {
-				*write_p++ = *read_p++;
-			}
+            if(read_p[1] == '/'){
+                ++read_p;
+            } else if(read_p[1] == '.'){
+                if(read_p[2] == '/' || !read_p[2]){
+                    read_p += 2;
+                } else if(read_p[2] == '.' && (read_p[3] == '/' || !read_p[3])){
+                    while(write_p > path && *--write_p != '/');
+                    read_p += 3;
+                } else {
+                    *write_p++ = *read_p++;
+                }
+            } else {
+                *write_p++ = *read_p++;
+            }
         } else {
             *write_p++ = *read_p++;
         }
     }
-	if(write_p == path) *write_p++ = '/';
+    if(write_p == path) *write_p++ = '/';
 
     if(max >= (write_p - path)){
         memcpy(buffer, path, write_p - path);