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Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha/shmctl.c')
-rw-r--r--sysdeps/unix/sysv/linux/alpha/shmctl.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/shmctl.c b/sysdeps/unix/sysv/linux/alpha/shmctl.c
new file mode 100644
index 0000000000..162afeee3d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/shmctl.c
@@ -0,0 +1,137 @@
+/* Copyright (C) 1995, 1997, 1998, 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+ 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 <sys/shm.h>
+#include <ipc_priv.h>
+
+#include <sysdep.h>
+#include <string.h>
+#include <sys/syscall.h>
+#include <bits/wordsize.h>
+
+#include "kernel-features.h"
+
+struct __old_shmid_ds
+{
+ struct __old_ipc_perm shm_perm; /* operation permission struct */
+ int shm_segsz; /* size of segment in bytes */
+ __time_t shm_atime; /* time of last shmat() */
+ __time_t shm_dtime; /* time of last shmdt() */
+ __time_t shm_ctime; /* time of last change by shmctl() */
+ __ipc_pid_t shm_cpid; /* pid of creator */
+ __ipc_pid_t shm_lpid; /* pid of last shmop */
+ unsigned short int shm_nattch; /* number of current attaches */
+ unsigned short int __shm_npages; /* size of segment (pages) */
+ unsigned long int *__shm_pages; /* array of ptrs to frames -> SHMMAX */
+ struct vm_area_struct *__attaches; /* descriptors for attaches */
+};
+
+struct __old_shminfo
+{
+ int shmmax;
+ int shmmin;
+ int shmmni;
+ int shmseg;
+ int shmall;
+};
+
+/* Provide operations to control over shared memory segments. */
+int __new_shmctl (int, int, struct shmid_ds *);
+
+int
+__new_shmctl (int shmid, int cmd, struct shmid_ds *buf)
+{
+#if __ASSUME_32BITUIDS > 0
+ return INLINE_SYSCALL (shmctl, 3, shmid, cmd | __IPC_64, buf);
+#else
+ switch (cmd) {
+ case SHM_STAT:
+ case IPC_STAT:
+ case IPC_SET:
+ case IPC_INFO:
+ break;
+ default:
+ return INLINE_SYSCALL (shmctl, 3, shmid, cmd, buf);
+ }
+
+ {
+ int save_errno = errno, result;
+ struct __old_shmid_ds old;
+
+ /* Unfortunately there is no way how to find out for sure whether
+ we should use old or new shmctl. */
+ result = INLINE_SYSCALL (shmctl, 3, shmid, cmd | __IPC_64, buf);
+ if (result != -1 || errno != EINVAL)
+ return result;
+
+ __set_errno(save_errno);
+ if (cmd == IPC_SET)
+ {
+ old.shm_perm.uid = buf->shm_perm.uid;
+ old.shm_perm.gid = buf->shm_perm.gid;
+ old.shm_perm.mode = buf->shm_perm.mode;
+ if (old.shm_perm.uid != buf->shm_perm.uid ||
+ old.shm_perm.gid != buf->shm_perm.gid)
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+ }
+ result = INLINE_SYSCALL (shmctl, 3, shmid, cmd, &old);
+ if (result != -1 && (cmd == SHM_STAT || cmd == IPC_STAT))
+ {
+ memset(buf, 0, sizeof(*buf));
+ buf->shm_perm.__key = old.shm_perm.__key;
+ buf->shm_perm.uid = old.shm_perm.uid;
+ buf->shm_perm.gid = old.shm_perm.gid;
+ buf->shm_perm.cuid = old.shm_perm.cuid;
+ buf->shm_perm.cgid = old.shm_perm.cgid;
+ buf->shm_perm.mode = old.shm_perm.mode;
+ buf->shm_perm.__seq = old.shm_perm.__seq;
+ buf->shm_atime = old.shm_atime;
+ buf->shm_dtime = old.shm_dtime;
+ buf->shm_ctime = old.shm_ctime;
+ buf->shm_segsz = old.shm_segsz;
+ buf->shm_nattch = old.shm_nattch;
+ buf->shm_cpid = old.shm_cpid;
+ buf->shm_lpid = old.shm_lpid;
+ }
+ else if (result != -1 && cmd == IPC_INFO)
+ {
+ struct __old_shminfo *oldi = (struct __old_shminfo *)&old;
+ struct shminfo *i = (struct shminfo *)buf;
+
+ memset(i, 0, sizeof(*i));
+ i->shmmax = oldi->shmmax;
+ i->shmmin = oldi->shmmin;
+ i->shmmni = oldi->shmmni;
+ i->shmseg = oldi->shmseg;
+ i->shmall = oldi->shmall;
+ }
+ return result;
+ }
+#endif
+}
+
+#if defined PIC && DO_VERSIONING
+default_symbol_version (__new_shmctl, shmctl, GLIBC_2.2);
+#else
+weak_alias (__new_shmctl, shmctl);
+#endif