Linux/S390 implmentation of lchown.

1 files changed, 75 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/s390/lchown.c b/sysdeps/unix/sysv/linux/s390/lchown.c
new file mode 100644
index 0000000000..8ca77fc037
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/s390/lchown.c
@@ -0,0 +1,75 @@
+/* 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 <bp-checks.h>
+
+#include <linux/posix_types.h>
+#include "kernel-features.h"
+
+extern int __syscall_lchown (const char *__unbounded __file,
+			     __kernel_uid_t __owner, __kernel_gid_t __group);
+
+# ifdef __NR_lchown32
+extern int __syscall_lchown32 (const char *__unbounded __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_lchown32 */
+
+int
+__lchown (const char *file, uid_t owner, gid_t group)
+{
+# if __ASSUME_32BITUIDS > 0
+  return INLINE_SYSCALL (lchown32, 3, CHECK_STRING (file), owner, group);
+# else
+#  ifdef __NR_lchown32
+  if (__libc_missing_32bit_uids <= 0)
+    {
+      int result;
+      int saved_errno = errno;
+
+      result = INLINE_SYSCALL (lchown32, 3, CHECK_STRING (file), owner, group);
+      if (result == 0 || errno != ENOSYS)
+	return result;
+
+      __set_errno (saved_errno);
+      __libc_missing_32bit_uids = 1;
+    }
+#  endif /* __NR_lchown32 */
+
+  if (((owner + 1) > (uid_t) ((__kernel_uid_t) -1U))
+      || ((group + 1) > (gid_t) ((__kernel_gid_t) -1U)))
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  return INLINE_SYSCALL (lchown, 3, CHECK_STRING (file), owner, group);
+# endif
+}
+
+weak_alias (__lchown, lchown)