diff --git a/include/tlibc/filesystem.h b/include/tlibc/filesystem.h
new file mode 100644
index 0000000..fc3a1f5
--- /dev/null
+++ b/include/tlibc/filesystem.h
@@ -0,0 +1,54 @@
+#pragma once
+#include "std.h"
+#include "errors.h"
+#include "string/str.h"
+
+#if !defined(KFS_USE_WINDOWS_H)
+    #if defined(_WIN64) || defined(_WIN32)
+        #define KFS_USE_WINDOWS_H 1
+    #else 
+        #define KFS_USE_WINDOWS_H 0
+    #endif
+#endif
+
+#if KFS_USE_WINDOWS_H
+    #define path_sep '\\'
+    #define path_seps "\\"
+    #define path_notsep '/'
+    #define path_notseps "/"
+#else
+    #define path_sep '/'
+    #define path_seps "/"
+    #define path_notsep '\\'
+    #define path_notseps "\\"
+#endif
+
+/// @brief removes part of path after path_sep
+/// @return str with data = path.data
+str path_dirname(str path);
+
+/// @brief removes part of path before path_sep
+/// @return str with data = path.data
+str path_basename(str path, bool remove_ext);
+
+
+/// open a file for reading 
+#define FO_Read "rb"
+/// (re)create a file for writing
+#define FO_Write "wb" 
+/// opens file for writing additional data to the end / creates new file 
+#define FO_Append "ab"
+/// (re)creates file for reading/writing
+#define FO_ReadWrite "w+b"
+/// opens file for readng/writing additional data to the end / creates new file 
+#define FO_ReadAppend "a+b"
+
+Result(FILE*) file_open(cstr file_name, cstr fopen_mode);
+
+bool file_exists(cstr path);
+
+
+
+bool dir_exists(cstr path);
+
+Result(void) dir_create(cstr path);
diff --git a/include/tlibc/string/str.h b/include/tlibc/string/str.h
index e09e40a..4c3b4e7 100755
--- a/include/tlibc/string/str.h
+++ b/include/tlibc/string/str.h
@@ -16,6 +16,10 @@ typedef struct str {
 
 #define str_construct(DATA, LEN, ZERO_TERMINATED) ((str){ .data = DATA, .size = LEN, .isZeroTerminated = ZERO_TERMINATED })
 
+static inline str str_from_cstr(cstr s_ptr){
+    return str_construct((void*)s_ptr, strlen(s_ptr), true);
+}
+
 static const str str_null = str_construct(NULL, 0, 0);
 
 /// copies src content to new string and adds \0 at the end
diff --git a/src/filesystem/dir.c b/src/filesystem/dir.c
new file mode 100644
index 0000000..6e8c97d
--- /dev/null
+++ b/src/filesystem/dir.c
@@ -0,0 +1,42 @@
+#include "tlibc/filesystem.h"
+#include "io_includes.h"
+
+bool dir_exists(cstr path){
+    if(path[0]=='.'){
+        if(path[1]==0 || (path[1]==path_sep && path[1]==0)) 
+            return true; // dir . or ./ always exists
+        // else if(path[1]=='.' && path[2]==path_sep)
+        //TODO path_resolve because windows doesnt recognize .\ pattern
+    }
+#if KFS_USE_WINDOWS_H
+    DWORD dwAttrib = GetFileAttributes(path);
+    return (bool)(
+        (dwAttrib != INVALID_FILE_ATTRIBUTES) && // file exists
+        (dwAttrib & FILE_ATTRIBUTE_DIRECTORY)); // file is a directory
+#else
+    struct stat stats;
+    i32 rez=stat(path, &stats);
+    return (bool)(
+        (rez!=-1) && // file exists
+        (S_ISDIR(stats.st_mode))); // file is a directory
+#endif
+}
+
+Result(void) dir_create(cstr path){
+    if (dir_exists(path))
+        return RESULT_VOID;
+    
+    char* parentDir= str_copy(path_dirname(str_from_cstr((void*)path))).data;
+    try(_1, dir_create(parentDir), free(parentDir));
+    free(parentDir);
+#if KFS_USE_WINDOWS_H
+    if(!CreateDirectory(path, NULL))
+#else
+    if(mkdir(path, 0777) == -1)
+#endif
+    {
+        return RESULT_ERROR(sprintf_malloc(512, "can't create dicectory '%s'", path), true);
+    }
+
+    return RESULT_VOID;
+}
diff --git a/src/filesystem/file.c b/src/filesystem/file.c
new file mode 100644
index 0000000..f340cc8
--- /dev/null
+++ b/src/filesystem/file.c
@@ -0,0 +1,34 @@
+#include "tlibc/filesystem.h"
+#include "io_includes.h"
+
+bool file_exists(cstr path){
+    if(path[0]=='.'){
+        if(path[1]==0 || (path[1]==path_sep && path[2]==0))
+            return false; // . or ./ is not a file
+        // else if(path[1]=='.' && path[2]==path_sep)
+        //TODO path_resolve because windows doesnt recognize .\ pattern
+    }
+
+#if KFS_USE_WINDOWS_H
+    DWORD dwAttrib = GetFileAttributes(path);
+    return (bool)(
+        (dwAttrib != INVALID_FILE_ATTRIBUTES) && // file exists
+        !(dwAttrib & FILE_ATTRIBUTE_DIRECTORY)); // file is not directory
+#else
+    struct stat stats;
+    i32 rez=stat(path, &stats);
+    return (bool)(
+        (rez!=-1) && // file exists
+        !(S_ISDIR(stats.st_mode))); // file is not directory
+#endif
+}
+
+Result(FILE*) file_open(cstr file_name, cstr fopen_mode){
+    FILE* f = fopen(file_name, fopen_mode);
+    if(f == NULL){
+        char* errmsg = sprintf_malloc(256, "can't open (%s) file '%s': %s",
+                fopen_mode, file_name, strerror(errno));
+        return RESULT_ERROR(errmsg, true);
+    }
+    return RESULT_VALUE(p, f);
+}
diff --git a/src/filesystem/io_includes.h b/src/filesystem/io_includes.h
new file mode 100644
index 0000000..2b75fc8
--- /dev/null
+++ b/src/filesystem/io_includes.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#if KFS_USE_WINDOWS_H
+#include <windows.h>
+#else
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#endif
diff --git a/src/filesystem/path.c b/src/filesystem/path.c
new file mode 100644
index 0000000..5221ecc
--- /dev/null
+++ b/src/filesystem/path.c
@@ -0,0 +1,29 @@
+#include "tlibc/filesystem.h"
+
+str path_dirname(str path){
+    i32 sepIndex = str_seekCharReverse(path, path_sep, 0);
+    if(sepIndex <= 0)
+        return path;
+    
+    path.size = sepIndex;
+    path.isZeroTerminated = false;
+    return path;
+}
+
+str path_basename(str path, bool remove_ext){
+    i32 nameIndex  =  str_seekCharReverse(path, path_sep, 0) + 1;
+    if(nameIndex == path.size)
+        return path;
+    
+    path.data +=  nameIndex;
+    path.size -=  nameIndex;
+    if(remove_ext)
+        return path;
+    
+    i32 extIndex  =  str_seekCharReverse(path, '.', -1);
+    if(extIndex > 0){
+        path.size = extIndex;
+        path.isZeroTerminated = false;
+    }
+    return path;
+}