From e07dd5afb5a47b8a707f205727e0e4861b409f0a Mon Sep 17 00:00:00 2001
From: Jay Sorg <jay.sorg@gmail.com>
Date: Sat, 13 Oct 2012 22:48:05 -0700
Subject: [PATCH] added a file open funtion

---
 common/os_calls.c | 38 ++++++++++++++++++++++++++++++++++++++
 common/os_calls.h |  3 +++
 2 files changed, 41 insertions(+)

diff --git a/common/os_calls.c b/common/os_calls.c
index 20c84f3e..602d6c0f 100644
--- a/common/os_calls.c
+++ b/common/os_calls.c
@@ -1370,6 +1370,44 @@ g_file_open(const char *file_name)
 #endif
 }
 
+/*****************************************************************************/
+/* returns -1 on error, else return handle or file descriptor */
+int APP_CC
+g_file_open_ex(const char *file_name, int aread, int awrite,
+               int acreate, int atrunc)
+{
+#if defined(_WIN32)
+    return -1;
+#else
+    int rv;
+    int flags;
+
+    flags = 0;
+    if (aread && awrite)
+    {
+        flags |= O_RDWR;
+    }
+    else if (aread)
+    {
+        flags |= O_RDONLY;
+    }
+    else if (awrite)
+    {
+        flags |= O_WRONLY;
+    }
+    if (acreate)
+    {
+        flags |= O_CREAT;
+    }
+    if (atrunc)
+    {
+        flags |= O_TRUNC;
+    }
+    rv =  open(file_name, flags, S_IRUSR | S_IWUSR);
+    return rv;
+#endif
+}
+
 /*****************************************************************************/
 /* returns error, always 0 */
 int APP_CC
diff --git a/common/os_calls.h b/common/os_calls.h
index c734c9fe..4bbd09de 100644
--- a/common/os_calls.h
+++ b/common/os_calls.h
@@ -133,6 +133,9 @@ g_memcmp(const void* s1, const void* s2, int len);
 int APP_CC
 g_file_open(const char* file_name);
 int APP_CC
+g_file_open_ex(const char *file_name, int aread, int awrite,
+               int acreate, int atrunc);
+int APP_CC
 g_file_close(int fd);
 int APP_CC
 g_file_read(int fd, char* ptr, int len);