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authorRoland McGrath <roland@gnu.org>2001-06-14 05:32:26 +0000
committerRoland McGrath <roland@gnu.org>2001-06-14 05:32:26 +0000
commit221dc560bb546465befd0a0471f52aa88b69cca6 (patch)
tree5ba21b924ba621b68db7074b08a0c3eb68386462 /sysdeps/mach/hurd/pread64.c
parentc0c71388a72ac59d6d3377e5902431bc888b73f6 (diff)
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* sysdeps/mach/hurd/fork.c (LOSE): Put `goto lose' in dead code
so the label is not considered unused. * sysdeps/mach/hurd/pwrite64.c: New file. * sysdeps/mach/hurd/pread64.c: New file. * sysdeps/mach/hurd/pread.c (__libc_pread): Define this name, with __pread as an alias. * sysdeps/mach/hurd/pwrite.c (__libc_pwrite): Define this name, with __pwrite as an alias. Implement POSIX "shared memory objects" as regular files residing in the /var/run/shm/ directory. This works on any system that supports _POSIX_MAPPED_FILES, to make it also support _POSIX_SHARED_MEMORY_OBJECTS. * sysdeps/posix/shm_open.c: New file. * sysdeps/posix/shm_unlink.c: New file. * sysdeps/mach/hurd/bits/posix_opt.h (_POSIX_SHARED_MEMORY_OBJECTS): Define it. * rt/aio_notify.c (__aio_notify_only) [! _POSIX_REALTIME_SIGNALS]: Use raise instead of __aio_sigqueue.
Diffstat (limited to 'sysdeps/mach/hurd/pread64.c')
-rw-r--r--sysdeps/mach/hurd/pread64.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/pread64.c b/sysdeps/mach/hurd/pread64.c
new file mode 100644
index 0000000000..43841eeb49
--- /dev/null
+++ b/sysdeps/mach/hurd/pread64.c
@@ -0,0 +1,43 @@
+/* Read block from given position in file without changing file pointer.
+ Hurd version.
+ Copyright (C) 2001 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>
+
+ssize_t
+__libc_pread64 (int fd, void *buf, size_t nbyte, off64_t offset)
+{
+ /* XXX We don't really support large files on the Hurd. So if
+ OFFSET doesn't fit in an `off_t', we'll return `-1' and set
+ errno. EOVERFLOW probably isn't the right error value, but seems
+ appropriate here. */
+ if ((off_t) offset != offset)
+ {
+ __set_errno (EOVERFLOW);
+ return -1;
+ }
+
+ return __libc_pread (fd, buf, nbyte, offset);
+}
+
+#ifndef __libc_pread64
+weak_alias (__libc_pread64, __pread64)
+weak_alias (__libc_pread64, pread64)
+#endif