newlib-2.1.0

git-svn-id: svn://kolibrios.org@4921 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/newlib/libc/reent/linkr.c

@@ -0,0 +1,66 @@
+/* Reentrant versions of file system calls.  These implementations
+   just call the usual system calls.  */
+
+#include <reent.h>
+#include <unistd.h>
+#include <_syslist.h>
+
+/* Some targets provides their own versions of these functions.  Those
+   targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS.  */
+
+#ifdef _REENT_ONLY
+#ifndef REENTRANT_SYSCALLS_PROVIDED
+#define REENTRANT_SYSCALLS_PROVIDED
+#endif
+#endif
+
+#ifdef REENTRANT_SYSCALLS_PROVIDED
+
+int _dummy_link_syscalls = 1;
+
+#else
+
+/* We use the errno variable used by the system dependent layer.  */
+#undef errno
+extern int errno;
+
+/*
+FUNCTION
+	<<_link_r>>---Reentrant version of link
+	
+INDEX
+	_link_r
+
+ANSI_SYNOPSIS
+	#include <reent.h>
+	int _link_r(struct _reent *<[ptr]>,
+		    const char *<[old]>, const char *<[new]>);
+
+TRAD_SYNOPSIS
+	#include <reent.h>
+	int _link_r(<[ptr]>, <[old]>, <[new]>)
+	struct _reent *<[ptr]>;
+	char *<[old]>;
+	char *<[new]>;
+
+DESCRIPTION
+	This is a reentrant version of <<link>>.  It
+	takes a pointer to the global data block, which holds
+	<<errno>>.
+*/
+
+int
+_DEFUN (_link_r, (ptr, old, new),
+     struct _reent *ptr _AND
+     _CONST char *old _AND
+     _CONST char *new)
+{
+  int ret;
+
+  errno = 0;
+  if ((ret = _link (old, new)) == -1 && errno != 0)
+    ptr->_errno = errno;
+  return ret;
+}
+
+#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */