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glibc/sysdeps/unix/sysv/linux/msgctl.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/msg.h> | |
#include <ipc_priv.h> | |
#include <sysdep.h> | |
#include <string.h> | |
#include <sys/syscall.h> | |
#include <shlib-compat.h> | |
#include <kernel-features.h> | |
struct __old_msqid_ds | |
{ | |
struct __old_ipc_perm msg_perm; /* structure describing operation permission */ | |
struct msg *__msg_first; /* pointer to first message on queue */ | |
struct msg *__msg_last; /* pointer to last message on queue */ | |
__time_t msg_stime; /* time of last msgsnd command */ | |
__time_t msg_rtime; /* time of last msgrcv command */ | |
__time_t msg_ctime; /* time of last change */ | |
struct wait_queue *__wwait; /* ??? */ | |
struct wait_queue *__rwait; /* ??? */ | |
unsigned short int __msg_cbytes; /* current number of bytes on queue */ | |
unsigned short int msg_qnum; /* number of messages currently on queue */ | |
unsigned short int msg_qbytes; /* max number of bytes allowed on queue */ | |
__ipc_pid_t msg_lspid; /* pid of last msgsnd() */ | |
__ipc_pid_t msg_lrpid; /* pid of last msgrcv() */ | |
}; | |
/* Allows to control internal state and destruction of message queue | |
objects. */ | |
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2) | |
int __old_msgctl (int, int, struct __old_msqid_ds *); | |
#endif | |
int __new_msgctl (int, int, struct msqid_ds *); | |
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2) | |
int | |
attribute_compat_text_section | |
__old_msgctl (int msqid, int cmd, struct __old_msqid_ds *buf) | |
{ | |
return INLINE_SYSCALL (ipc, 5, IPCOP_msgctl, msqid, cmd, 0, buf); | |
} | |
compat_symbol (libc, __old_msgctl, msgctl, GLIBC_2_0); | |
#endif | |
int | |
__new_msgctl (int msqid, int cmd, struct msqid_ds *buf) | |
{ | |
return INLINE_SYSCALL (ipc, 5, IPCOP_msgctl, msqid, cmd | __IPC_64, 0, buf); | |
} | |
versioned_symbol (libc, __new_msgctl, msgctl, GLIBC_2_2); |