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authorAndreas Jaeger <aj@suse.de>2000-05-30 12:50:54 +0000
committerAndreas Jaeger <aj@suse.de>2000-05-30 12:50:54 +0000
commite82a0295170ae512560b099cb4533f5a4b9cf57c (patch)
treee052ef619d7860d3c2f6538bcdf81f9dcc74c3ea /sysdeps/unix/sysv/linux/mips/truncate64.c
parent03fad0ecf6492a92010aeb1101029e4f768a2666 (diff)
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Update.
2000-05-30 Andreas Jaeger <aj@suse.de> * sysdeps/unix/sysv/linux/mips/truncate64.c: New file. * sysdeps/unix/sysv/linux/mips/ftruncate64.c: New file. * sysdeps/unix/sysv/linux/mips/pread64.c: Readded file. * sysdeps/unix/sysv/linux/mips/pwrite64.c: Readded file. * sysdeps/unix/sysv/linux/mips/pread.c: Readded file. * sysdeps/unix/sysv/linux/mips/pwrite.c: Readded file.
Diffstat (limited to 'sysdeps/unix/sysv/linux/mips/truncate64.c')
-rw-r--r--sysdeps/unix/sysv/linux/mips/truncate64.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/truncate64.c b/sysdeps/unix/sysv/linux/mips/truncate64.c
new file mode 100644
index 0000000000..08d9667612
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/truncate64.c
@@ -0,0 +1,84 @@
+/* Copyright (C) 1997, 1998, 1999, 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 <sys/types.h>
+#include <endian.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+
+#include "kernel-features.h"
+
+#ifdef __NR_truncate64
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+/* The variable is shared between all wrappers around *truncate64 calls. */
+int __have_no_truncate64;
+#endif
+
+/* The order of hight, low depends on endianness. */
+extern int __syscall_truncate64 (const char *path, int high_length, int low_length);
+
+
+/* Truncate the file FD refers to to LENGTH bytes. */
+int
+truncate64 (const char *path, off64_t length)
+{
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+ if (! __have_no_truncate64)
+#endif
+ {
+ unsigned int low = length & 0xffffffff;
+ unsigned int high = length >> 32;
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+ int saved_errno = errno;
+#endif
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+ /* Use a fill argument to pass low, high in an aligned pair of
+ arguments (here 2/3). */
+ int result = INLINE_SYSCALL (truncate64, 3, path, 0, low, high);
+#elif __BYTE_ORDER == __BIG_ENDIAN
+ int result = INLINE_SYSCALL (truncate64, 3, path, 0, high, low);
+#endif
+
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+ if (result != -1 || errno != ENOSYS)
+#endif
+ return result;
+
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+ __set_errno (saved_errno);
+ __have_no_truncate64 = 1;
+#endif
+ }
+
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+ if ((off_t) length != length)
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+ return truncate (path, (off_t) length);
+#endif
+}
+
+#else
+/* Use the generic implementation. */
+# include <sysdeps/generic/truncate64.c>
+#endif