1 files changed, 118 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/chown.c b/sysdeps/unix/sysv/linux/s390/chown.c
new file mode 100644
index 0000000000..0e22192858
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/s390/chown.c
@@ -0,0 +1,118 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <unistd.h>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+#include <shlib-compat.h>
+#include <bp-checks.h>
+
+#include <linux/posix_types.h>
+#include "kernel-features.h"
+
+/*
+  In Linux 2.1.x the chown functions have been changed.  A new function lchown
+  was introduced.  The new chown now follows symlinks - the old chown and the
+  new lchown do not follow symlinks.
+  The new lchown function has the same number as the old chown had and the
+  new chown has a new number.  When compiling with headers from Linux > 2.1.8x
+  it's impossible to run this libc with older kernels.  In these cases libc
+  has therefore to route calls to chown to the old chown function.
+*/
+
+extern int __syscall_chown (const char *__file,
+			    __kernel_uid_t __owner, __kernel_gid_t __group);
+
+/* Running under Linux > 2.1.80.  */
+
+#ifdef __NR_chown32
+extern int __syscall_chown32 (const char *__file,
+			      __kernel_uid32_t owner, __kernel_gid32_t group);
+# if __ASSUME_32BITUIDS == 0
+/* This variable is shared with all files that need to check for 32bit
+   uids.  */
+extern int __libc_missing_32bit_uids;
+# endif
+#endif /* __NR_chown32 */
+
+int
+__real_chown (const char *file, uid_t owner, gid_t group)
+{
+  static int __libc_old_chown;
+  int result;
+
+  if (!__libc_old_chown)
+    {
+      int saved_errno = errno;
+#ifdef __NR_chown32
+      if (__libc_missing_32bit_uids <= 0)
+	{
+	  int result;
+	  int saved_errno = errno;
+
+	  result = INLINE_SYSCALL (chown32, 3, CHECK_STRING (file), owner, group);
+	  if (result == 0 || errno != ENOSYS)
+	    return result;
+
+	  __set_errno (saved_errno);
+	  __libc_missing_32bit_uids = 1;
+	}
+#endif /* __NR_chown32 */
+      if (((owner + 1) > (uid_t) ((__kernel_uid_t) -1U))
+	  || ((group + 1) > (gid_t) ((__kernel_gid_t) -1U)))
+	{
+	  __set_errno (EINVAL);
+	  return -1;
+	}
+
+      result = INLINE_SYSCALL (chown, 3, CHECK_STRING (file), owner, group);
+
+      if (result >= 0 || errno != ENOSYS)
+	return result;
+
+      __set_errno (saved_errno);
+      __libc_old_chown = 1;
+    }
+
+  return __lchown (file, owner, group);
+}
+
+
+#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
+/* Compiling for compatibiity.  */
+int
+__chown_is_lchown (const char *file, uid_t owner, gid_t group)
+{
+  return __lchown (file, owner, group);
+}
+#endif
+
+#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
+strong_alias (__chown_is_lchown, _chown_is_lchown)
+compat_symbol (libc, __chown_is_lchown, __chown, GLIBC_2_0);
+compat_symbol (libc, _chown_is_lchown, chown, GLIBC_2_0);
+
+strong_alias (__real_chown, _real_chown)
+versioned_symbol (libc, __real_chown, __chown, GLIBC_2_1);
+versioned_symbol (libc, _real_chown, chown, GLIBC_2_1);
+#else
+strong_alias (__real_chown, __chown)
+weak_alias (__real_chown, chown)
+#endif