From ce8bab5a923b07d34ea80dd2a508018aa34159ba Mon Sep 17 00:00:00 2001
From: Corinna Vinschen <corinna@vinschen.de>
Date: Thu, 8 Feb 2007 13:36:53 +0000
Subject: 	* cygwin.din (shm_open): Export. 	(shm_unlink): Export. 
 * syscalls.cc (shm_open): New function. 	(shm_unlink): New function. 
 * sysconf.cc (sca): Set value of _SC_SHARED_MEMORY_OBJECTS to 
 _POSIX_SHARED_MEMORY_OBJECTS. 	* include/cygwin/version.h: Bump API minor
 number. 	* include/sys/mman.h (shm_open): Add prototype. 
 (shm_unlink): Ditto.

---
 winsup/cygwin/syscalls.cc | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

(limited to 'winsup/cygwin/syscalls.cc')

diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc
index 6a0e45fb5..998fe0ed4 100644
--- a/winsup/cygwin/syscalls.cc
+++ b/winsup/cygwin/syscalls.cc
@@ -3346,3 +3346,49 @@ pclose (FILE *fp)
 
   return status;
 }
+
+#define SHM_STORAGE "/dev/shm"
+
+extern "C" int
+shm_open (const char *name, int oflag, mode_t mode)
+{
+  /* Name must start with a single slash. */
+  if (!name || name[0] != '/' || name[1] == '/'
+      || strlen (name) > CYG_MAX_PATH - sizeof (SHM_STORAGE))
+    {
+      debug_printf ("Invalid shared memory object name '%s'", name);
+      set_errno (EINVAL);
+      return -1;
+    }
+  /* Check for valid flags. */
+  if (((oflag & O_ACCMODE) != O_RDONLY && (oflag & O_ACCMODE) != O_RDWR)
+      || (oflag & ~(O_ACCMODE | O_CREAT | O_EXCL | O_TRUNC)))
+    {
+      debug_printf ("Invalid oflag 0%o", oflag);
+      set_errno (EINVAL);
+      return -1;
+    }
+  /* Note that we require the existance of /dev/shm here.  We don't
+     create this directory from here.  That's the task of the installer. */
+  char shmname[CYG_MAX_PATH];
+  strcpy (shmname, SHM_STORAGE);
+  strcat (shmname, name);
+  return open (shmname, oflag, mode & 0777);
+}
+
+extern "C" int
+shm_unlink (const char *name)
+{
+  /* Name must start with a single slash. */
+  if (!name || name[0] != '/' || name[1] == '/'
+      || strlen (name) > CYG_MAX_PATH - sizeof (SHM_STORAGE))
+    {
+      debug_printf ("Invalid shared memory object name '%s'", name);
+      set_errno (EINVAL);
+      return -1;
+    }
+  char shmname[CYG_MAX_PATH];
+  strcpy (shmname, SHM_STORAGE);
+  strcat (shmname, name);
+  return unlink (shmname);
+}
-- 
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