From 03cafb600101c4bc659521b833a1f3a8c56938be Mon Sep 17 00:00:00 2001
From: Mike Buland <mike@xagasoft.com>
Date: Tue, 1 Oct 2024 11:45:17 -0700
Subject: More fixes opening files & exclusive mode.

---
 src/stable/myriad.cpp  |  2 +-
 src/stable/myriad.h    |  2 +-
 src/tests/myriadfs.cpp | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 64 insertions(+), 2 deletions(-)
 create mode 100644 src/tests/myriadfs.cpp

diff --git a/src/stable/myriad.cpp b/src/stable/myriad.cpp
index f9fcd3e..03cffa9 100644
--- a/src/stable/myriad.cpp
+++ b/src/stable/myriad.cpp
@@ -84,7 +84,7 @@ Bu::MyriadStream Bu::Myriad::open( Bu::Myriad::StreamId iStream,
     Bu::MutexLocker l( mhStream );
     if( (eMode&Create) )
     {
-        if( !hStream.has( iStream ) )
+        if( hStream.has( iStream ) )
         {
             if( (eMode&Exclusive) )
             {
diff --git a/src/stable/myriad.h b/src/stable/myriad.h
index 7f84c2a..6168aa2 100644
--- a/src/stable/myriad.h
+++ b/src/stable/myriad.h
@@ -45,7 +45,7 @@ namespace Bu
             Truncate    = 0x08, ///< Truncate file if it does exist
             Append      = 0x10, ///< Start writing at end of file
             //NonBlock    = 0x20, ///< Open file in non-blocking mode
-            Exclusive   = 0x44, ///< Create file, if it exists then fail
+            Exclusive   = 0x40, ///< Create file, if it exists then fail
 
             // Helpful mixes
             ReadWrite   = 0x03, ///< Open for reading and writing
diff --git a/src/tests/myriadfs.cpp b/src/tests/myriadfs.cpp
new file mode 100644
index 0000000..1266e4b
--- /dev/null
+++ b/src/tests/myriadfs.cpp
@@ -0,0 +1,62 @@
+#include "bu/file.h"
+#include "bu/membuf.h"
+#include "bu/myriadfs.h"
+#include "bu/myriadstream.h"
+#include "bu/sio.h"
+
+using namespace Bu;
+
+int main()
+{
+//  Bu::MemBuf mb;
+    Bu::File mb("store.myr", File::Read|File::Write|File::Create );
+    Bu::MyriadFs mfs( mb, 512 );
+
+    sio << "Creating dirs..." << sio.nl;
+    mfs.create("/etc", Bu::MyriadFs::typeDir|0755 );
+    mfs.create("/dev", Bu::MyriadFs::typeDir|0755 );
+    mfs.create("/usr", Bu::MyriadFs::typeDir|0755 );
+
+    mfs.create("/dev/null", Bu::MyriadFs::typeChrDev|0666, 1, 3 );
+    mfs.create("/dev/zero", Bu::MyriadFs::typeChrDev|0666, 1, 5 );
+    mfs.create("/dev/sda", Bu::MyriadFs::typeBlkDev|0660, 8, 0 );
+
+    sio << "Creating files..." << sio.nl;
+    {
+        Bu::MyriadStream ms = mfs.open("/hello", Bu::MyriadFs::Read );
+        ms.write("world!");
+    }
+    {
+        Bu::MyriadStream ms = mfs.open("/etc/hello", Bu::MyriadFs::Read );
+        ms.write("world, again!");
+    }
+    {
+        Bu::MyriadStream ms = mfs.open("/etc/trunc", Bu::MyriadFs::Write );
+        ms.write("[longer text shouldn't be seen]");
+    }
+    {
+        Bu::MyriadStream ms = mfs.open("/etc/trunc", Bu::MyriadFs::Write|Bu::MyriadFs::Create|Bu::MyriadFs::Truncate );
+        ms.write("[short text]");
+    }
+
+    sio << "Reading files..." << sio.nl;
+    {
+        Bu::MyriadStream ms = mfs.open("/hello", Bu::MyriadFs::Read );
+        char buf[512];
+        buf[ms.read( buf, 512 )] = '\0';
+        sio << "read: '" << buf << "'" << sio.nl;
+    }
+    {
+        Bu::MyriadStream ms = mfs.open("/etc/hello", Bu::MyriadFs::Read );
+        char buf[512];
+        buf[ms.read( buf, 512 )] = '\0';
+        sio << "read: '" << buf << "'" << sio.nl;
+    }
+    {
+        Bu::MyriadStream ms = mfs.open("/etc/trunc", Bu::MyriadFs::Read );
+        char buf[512];
+        buf[ms.read( buf, 512 )] = '\0';
+        sio << "read: '" << buf << "'" << sio.nl;
+    }
+}
+
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