diff options
| -rw-r--r-- | ChangeLog | 23 | ||||
| -rw-r--r-- | rt/aio_notify.c | 19 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/bits/posix_opt.h | 10 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/fork.c | 2 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/pread.c | 8 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/pread64.c | 43 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/pwrite.c | 8 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/pwrite64.c | 43 | ||||
| -rw-r--r-- | sysdeps/posix/shm_open.c | 85 | ||||
| -rw-r--r-- | sysdeps/posix/shm_unlink.c | 62 |
10 files changed, 293 insertions, 10 deletions
@@ -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. diff --git a/rt/aio_notify.c b/rt/aio_notify.c index 558b2d2451..04a9dd6db3 100644 --- a/rt/aio_notify.c +++ b/rt/aio_notify.c @@ -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; } diff --git a/sysdeps/mach/hurd/bits/posix_opt.h b/sysdeps/mach/hurd/bits/posix_opt.h index 02280002a2..6231248bc2 100644 --- a/sysdeps/mach/hurd/bits/posix_opt.h +++ b/sysdeps/mach/hurd/bits/posix_opt.h @@ -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 diff --git a/sysdeps/mach/hurd/fork.c b/sysdeps/mach/hurd/fork.c index afc427045b..aa3a040aac 100644 --- a/sysdeps/mach/hurd/fork.c +++ b/sysdeps/mach/hurd/fork.c @@ -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)) { diff --git a/sysdeps/mach/hurd/pread.c b/sysdeps/mach/hurd/pread.c index dd69b10ac5..91b008f9f8 100644 --- a/sysdeps/mach/hurd/pread.c +++ b/sysdeps/mach/hurd/pread.c @@ -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 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 diff --git a/sysdeps/mach/hurd/pwrite.c b/sysdeps/mach/hurd/pwrite.c index 42de3eb9f9..f734c4f5f2 100644 --- a/sysdeps/mach/hurd/pwrite.c +++ b/sysdeps/mach/hurd/pwrite.c @@ -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 diff --git a/sysdeps/mach/hurd/pwrite64.c b/sysdeps/mach/hurd/pwrite64.c new file mode 100644 index 0000000000..7cca3d8172 --- /dev/null +++ b/sysdeps/mach/hurd/pwrite64.c @@ -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 diff --git a/sysdeps/posix/shm_open.c b/sysdeps/posix/shm_open.c new file mode 100644 index 0000000000..8b8f87592d --- /dev/null +++ b/sysdeps/posix/shm_open.c @@ -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 diff --git a/sysdeps/posix/shm_unlink.c b/sysdeps/posix/shm_unlink.c new file mode 100644 index 0000000000..aee2fcc34d --- /dev/null +++ b/sysdeps/posix/shm_unlink.c @@ -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 |