Import BSDDB 4.7.25 (as of svn r89086)

os_qnx/os_qnx_open.c

@@ -0,0 +1,79 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1997,2008 Oracle.  All rights reserved.
+ *
+ * $Id: os_qnx_open.c 63573 2008-05-23 21:43:21Z trent.nelson $
+ */
+
+#include "db_config.h"
+
+#include "db_int.h"
+
+/*
+ * __os_qnx_region_open --
+ *	Open a shared memory region file using POSIX shm_open.
+ *
+ * PUBLIC: #ifdef HAVE_QNX
+ * PUBLIC: int __os_qnx_region_open
+ * PUBLIC:     __P((ENV *, const char *, int, int, DB_FH **));
+ * PUBLIC: #endif
+ */
+int
+__os_qnx_region_open(env, name, oflags, mode, fhpp)
+	ENV *env;
+	const char *name;
+	int oflags, mode;
+	DB_FH **fhpp;
+{
+	DB_FH *fhp;
+	int fcntl_flags;
+	int ret;
+
+	/*
+	 * Allocate the file handle and copy the file name.  We generally only
+	 * use the name for verbose or error messages, but on systems where we
+	 * can't unlink temporary files immediately, we use the name to unlink
+	 * the temporary file when the file handle is closed.
+	 *
+	 * Lock the ENV handle and insert the new file handle on the list.
+	 */
+	if ((ret = __os_calloc(env, 1, sizeof(DB_FH), &fhp)) != 0)
+		return (ret);
+	if ((ret = __os_strdup(env, name, &fhp->name)) != 0)
+		goto err;
+	if (env != NULL) {
+		MUTEX_LOCK(env, env->mtx_env);
+		TAILQ_INSERT_TAIL(&env->fdlist, fhp, q);
+		MUTEX_UNLOCK(env, env->mtx_env);
+		F_SET(fhp, DB_FH_ENVLINK);
+	}
+
+	/*
+	 * Once we have created the object, we don't need the name
+	 * anymore.  Other callers of this will convert themselves.
+	 */
+	if ((fhp->fd = shm_open(name, oflags, mode)) == -1) {
+		ret = __os_posix_err(__os_get_syserr());
+err:		(void)__os_closehandle(env, fhp);
+		return (ret);
+	}
+
+	F_SET(fhp, DB_FH_OPENED);
+
+#ifdef HAVE_FCNTL_F_SETFD
+	/* Deny file descriptor access to any child process. */
+	if ((fcntl_flags = fcntl(fhp->fd, F_GETFD)) == -1 ||
+	    fcntl(fhp->fd, F_SETFD, fcntl_flags | FD_CLOEXEC) == -1) {
+		ret = __os_get_syserr();
+		__db_syserr(env, ret, "fcntl(F_SETFD)");
+		(void)__os_closehandle(env, fhp);
+		return (__os_posix_err(ret));
+	}
+#else
+	COMPQUIET(fcntl_flags, 0);
+#endif
+	F_SET(fhp, DB_FH_OPENED);
+	*fhpp = fhp;
+	return (0);
+}