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glibc/sysdeps/unix/sysv/linux/shmctl.c
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/* Copyright (C) 1995-2016 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 Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 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 | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#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 <shlib-compat.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. */ | |
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2) | |
int __old_shmctl (int, int, struct __old_shmid_ds *); | |
#endif | |
int __new_shmctl (int, int, struct shmid_ds *); | |
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2) | |
int | |
attribute_compat_text_section | |
__old_shmctl (int shmid, int cmd, struct __old_shmid_ds *buf) | |
{ | |
return INLINE_SYSCALL (ipc, 5, IPCOP_shmctl, shmid, cmd, 0, buf); | |
} | |
compat_symbol (libc, __old_shmctl, shmctl, GLIBC_2_0); | |
#endif | |
int | |
__new_shmctl (int shmid, int cmd, struct shmid_ds *buf) | |
{ | |
return INLINE_SYSCALL (ipc, 5, IPCOP_shmctl, shmid, cmd | __IPC_64, 0, | |
buf); | |
} | |
versioned_symbol (libc, __new_shmctl, shmctl, GLIBC_2_2); |