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* sysdeps/mach/hurd/fork.c (LOSE): Put `goto lose' in dead code

Browse source 
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.
This commit is contained in:
Roland McGrath 2001-06-14 05:32:26 +00:00
parent c0c71388a7
commit 221dc560bb
10 changed files with 293 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

23
ChangeLog
View file

@ -1,5 +1,28 @@
2001-06-13 Roland McGrath <roland@frob.com>
* 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.
* sysdeps/mach/hurd/pread.c: Fail with EINVAL if OFFSET is negative.
* sysdeps/mach/hurd/pwrite.c: Likewise.

19
rt/aio_notify.c
View file

@ -1,5 +1,5 @@
/* Notify initiator of AIO request.
Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
Copyright (C) 1997,98,99,2000,01 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@ -58,10 +58,19 @@ __aio_notify_only (struct sigevent *sigev, pid_t caller_pid)
result = -1;
}
else if (sigev->sigev_notify == SIGEV_SIGNAL)
/* We have to send a signal. */
if (__aio_sigqueue (sigev->sigev_signo, sigev->sigev_value, caller_pid)
< 0)
result = -1;
{
/* We have to send a signal. */
#if _POSIX_REALTIME_SIGNALS
/* Note that the standard gives us the option of using a plain
non-queuing signal here when SA_SIGINFO is not set for the signal. */
if (__aio_sigqueue (sigev->sigev_signo, sigev->sigev_value, caller_pid)
< 0)
result = -1;
#else
/* There are no queued signals on this system at all. */
result = raise (sigev->sigev_signo);
#endif
}
return result;
}

10
sysdeps/mach/hurd/bits/posix_opt.h
View file

@ -31,6 +31,13 @@
/* Processes have a saved set-user-ID and a saved set-group-ID. */
#define _POSIX_SAVED_IDS 1
#if 0 /* XXX implement aio_* */
/* Asynchronous I/O is supported. */
#define _POSIX_ASYNCHRONOUS_IO 1
/* Alternative name for Unix98. */
#define _LFS_ASYNCHRONOUS_IO _POSIX_ASYNCHRONOUS_IO
#endif
/* Synchronizing file data is supported, but msync is missing. */
#undef _POSIX_SYNCHRONIZED_IO
@ -46,6 +53,9 @@
/* Setting of memory protections is supported. */
#define _POSIX_MEMORY_PROTECTION 1
/* POSIX.4 shared memory objects are supported (using regular files). */
#define _POSIX_SHARED_MEMORY_OBJECTS _POSIX_MAPPED_FILES
/* Implementation supports `poll' function. */
#define _POSIX_POLL 1

2
sysdeps/mach/hurd/fork.c
View file

@ -64,7 +64,7 @@ __fork (void)
__spin_lock (&ss->critical_section_lock);
#undef LOSE
#define LOSE assert_perror (err) /* XXX */
#define LOSE do { assert_perror (err); goto lose; } while (0) /* XXX */
if (! setjmp (env))
{

8
sysdeps/mach/hurd/pread.c
View file

@ -23,7 +23,7 @@
#include <hurd/fd.h>
ssize_t
__pread (int fd, void *buf, size_t nbytes, off_t offset)
__libc_pread (int fd, void *buf, size_t nbytes, off_t offset)
{
error_t err;
if (offset < 0)
@ -32,4 +32,8 @@ __pread (int fd, void *buf, size_t nbytes, off_t offset)
err = HURD_FD_USE (fd, _hurd_fd_read (descriptor, buf, &nbytes, offset));
return err ? __hurd_dfail (fd, err) : nbytes;
}
weak_alias (__pread, pread)
#ifndef __libc_pread
strong_alias (__libc_pread, __pread)
weak_alias (__libc_pread, pread)
#endif

43
sysdeps/mach/hurd/pread64.c Normal file
View file

@ -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

8
sysdeps/mach/hurd/pwrite.c
View file

@ -25,7 +25,7 @@
/* Write NBYTES of BUF to FD at given position OFFSET without changing
the file position. Return the number written, or -1. */
ssize_t
__pwrite (int fd, const void *buf, size_t nbytes, off_t offset)
__libc_pwrite (int fd, const void *buf, size_t nbytes, off_t offset)
{
error_t err;
if (offset < 0)
@ -34,4 +34,8 @@ __pwrite (int fd, const void *buf, size_t nbytes, off_t offset)
err = HURD_FD_USE (fd, _hurd_fd_write (descriptor, buf, &nbytes, offset));
return err ? __hurd_dfail (fd, err) : nbytes;
}
weak_alias (__pwrite, pwrite)
#ifndef __libc_pwrite
strong_alias (__libc_pwrite, __pwrite)
weak_alias (__libc_pwrite, pwrite)
#endif

43
sysdeps/mach/hurd/pwrite64.c Normal file
View file

@ -0,0 +1,43 @@
/* Write block to 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_pwrite64 (int fd, const 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_pwrite (fd, buf, nbyte, offset);
}
#ifndef __libc_pwrite64
weak_alias (__libc_pwrite64, __pwrite64)
weak_alias (__libc_pwrite64, pwrite64)
#endif

85
sysdeps/posix/shm_open.c Normal file
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@ -0,0 +1,85 @@
/* shm_open -- open a POSIX shared memory object. Generic POSIX file 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 <unistd.h>
#if ! _POSIX_MAPPED_FILES
#include <sysdeps/generic/shm_open.c>
#else
#include <errno.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <paths.h>
#define SHMDIR (_PATH_VARRUN "shm/")
/* Open shared memory object. */
int
shm_open (const char *name, int oflag, mode_t mode)
{
size_t namelen;
char *fname;
int fd;
/* Construct the filename. */
while (name[0] == '/')
++name;
if (name[0] == '\0')
{
/* The name "/" is not supported. */
__set_errno (EINVAL);
return -1;
}
namelen = strlen (name);
fname = (char *) __alloca (sizeof SHMDIR - 1 + namelen + 1);
__mempcpy (__mempcpy (fname, SHMDIR, sizeof SHMDIR - 1),
name, namelen + 1);
fd = open (name, oflag, mode);
if (fd != -1)
{
/* We got a descriptor. Now set the FD_CLOEXEC bit. */
int flags = fcntl (fd, F_GETFD, 0);
if (__builtin_expect (flags, 0) != -1)
{
flags |= FD_CLOEXEC;
flags = fcntl (fd, F_SETFD, flags);
}
if (flags == -1)
{
/* Something went wrong. We cannot return the descriptor. */
int save_errno = errno;
close (fd);
fd = -1;
__set_errno (save_errno);
}
}
return fd;
}
#endif

62
sysdeps/posix/shm_unlink.c Normal file
View file

@ -0,0 +1,62 @@
/* shm_unlink -- remove a POSIX shared memory object. Generic POSIX 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 <unistd.h>
#if ! _POSIX_MAPPED_FILES
#include <sysdeps/generic/shm_unlink.c>
#else
#include <errno.h>
#include <sys/mman.h>
#include <string.h>
#include <stdlib.h>
#include <paths.h>
#define SHMDIR (_PATH_VARRUN "shm/")
/* Remove shared memory object. */
int
shm_unlink (const char *name)
{
size_t namelen;
char *fname;
/* Construct the filename. */
while (name[0] == '/')
++name;
if (name[0] == '\0')
{
/* The name "/" is not supported. */
__set_errno (EINVAL);
return -1;
}
namelen = strlen (name);
fname = (char *) __alloca (sizeof SHMDIR - 1 + namelen + 1);
__mempcpy (__mempcpy (fname, SHMDIR, sizeof SHMDIR - 1),
name, namelen + 1);
return __unlink (name);
}
#endif