mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-05 11:11:04 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
280 lines
7.8 KiB
C
280 lines
7.8 KiB
C
/* Copyright (C) 1995-2022 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 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <sys/shm.h>
|
|
#include <stdarg.h>
|
|
#include <ipc_priv.h>
|
|
#include <sysdep.h>
|
|
#include <shlib-compat.h>
|
|
#include <errno.h>
|
|
#include <linux/posix_types.h> /* For __kernel_mode_t. */
|
|
|
|
/* POSIX states ipc_perm mode should have type of mode_t. */
|
|
_Static_assert (sizeof ((struct shmid_ds){0}.shm_perm.mode)
|
|
== sizeof (mode_t),
|
|
"sizeof (shmid_ds.shm_perm.mode) != sizeof (mode_t)");
|
|
|
|
#if __IPC_TIME64 == 0
|
|
typedef struct shmid_ds shmctl_arg_t;
|
|
#else
|
|
# include <struct_kernel_shmid64_ds.h>
|
|
|
|
static void
|
|
shmid64_to_kshmid64 (const struct __shmid64_ds *shmid64,
|
|
struct kernel_shmid64_ds *kshmid)
|
|
{
|
|
kshmid->shm_perm = shmid64->shm_perm;
|
|
kshmid->shm_segsz = shmid64->shm_segsz;
|
|
kshmid->shm_atime = shmid64->shm_atime;
|
|
kshmid->shm_atime_high = shmid64->shm_atime >> 32;
|
|
kshmid->shm_dtime = shmid64->shm_dtime;
|
|
kshmid->shm_dtime_high = shmid64->shm_dtime >> 32;
|
|
kshmid->shm_ctime = shmid64->shm_ctime;
|
|
kshmid->shm_ctime_high = shmid64->shm_ctime >> 32;
|
|
kshmid->shm_cpid = shmid64->shm_cpid;
|
|
kshmid->shm_lpid = shmid64->shm_lpid;
|
|
kshmid->shm_nattch = shmid64->shm_nattch;
|
|
}
|
|
|
|
static void
|
|
kshmid64_to_shmid64 (const struct kernel_shmid64_ds *kshmid,
|
|
struct __shmid64_ds *shmid64)
|
|
{
|
|
shmid64->shm_perm = kshmid->shm_perm;
|
|
shmid64->shm_segsz = kshmid->shm_segsz;
|
|
shmid64->shm_atime = kshmid->shm_atime
|
|
| ((__time64_t) kshmid->shm_atime_high << 32);
|
|
shmid64->shm_dtime = kshmid->shm_dtime
|
|
| ((__time64_t) kshmid->shm_dtime_high << 32);
|
|
shmid64->shm_ctime = kshmid->shm_ctime
|
|
| ((__time64_t) kshmid->shm_ctime_high << 32);
|
|
shmid64->shm_cpid = kshmid->shm_cpid;
|
|
shmid64->shm_lpid = kshmid->shm_lpid;
|
|
shmid64->shm_nattch = kshmid->shm_nattch;
|
|
}
|
|
|
|
typedef struct kernel_shmid64_ds shmctl_arg_t;
|
|
#endif
|
|
|
|
static int
|
|
shmctl_syscall (int shmid, int cmd, shmctl_arg_t *buf)
|
|
{
|
|
#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
|
|
return INLINE_SYSCALL_CALL (shmctl, shmid, cmd | __IPC_64, buf);
|
|
#else
|
|
return INLINE_SYSCALL_CALL (ipc, IPCOP_shmctl, shmid, cmd | __IPC_64, 0,
|
|
buf);
|
|
#endif
|
|
}
|
|
|
|
/* Provide operations to control over shared memory segments. */
|
|
int
|
|
__shmctl64 (int shmid, int cmd, struct __shmid64_ds *buf)
|
|
{
|
|
#if __IPC_TIME64
|
|
struct kernel_shmid64_ds kshmid, *arg = NULL;
|
|
#else
|
|
shmctl_arg_t *arg;
|
|
#endif
|
|
|
|
switch (cmd)
|
|
{
|
|
case IPC_RMID:
|
|
case SHM_LOCK:
|
|
case SHM_UNLOCK:
|
|
arg = NULL;
|
|
break;
|
|
|
|
case IPC_SET:
|
|
case IPC_STAT:
|
|
case SHM_STAT:
|
|
case SHM_STAT_ANY:
|
|
#if __IPC_TIME64
|
|
if (buf != NULL)
|
|
{
|
|
shmid64_to_kshmid64 (buf, &kshmid);
|
|
arg = &kshmid;
|
|
}
|
|
# ifdef __ASSUME_SYSVIPC_BROKEN_MODE_T
|
|
if (cmd == IPC_SET)
|
|
arg->shm_perm.mode *= 0x10000U;
|
|
# endif
|
|
#else
|
|
arg = buf;
|
|
#endif
|
|
break;
|
|
|
|
case IPC_INFO:
|
|
case SHM_INFO:
|
|
/* This is a Linux extension where kernel expects either a
|
|
'struct shminfo' (IPC_INFO) or 'struct shm_info' (SHM_INFO). */
|
|
arg = (__typeof__ (arg)) buf;
|
|
break;
|
|
|
|
default:
|
|
__set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
|
|
int ret = shmctl_syscall (shmid, cmd, arg);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
switch (cmd)
|
|
{
|
|
case IPC_STAT:
|
|
case SHM_STAT:
|
|
case SHM_STAT_ANY:
|
|
#ifdef __ASSUME_SYSVIPC_BROKEN_MODE_T
|
|
arg->shm_perm.mode >>= 16;
|
|
#else
|
|
/* Old Linux kernel versions might not clear the mode padding. */
|
|
if (sizeof ((struct shmid_ds){0}.shm_perm.mode)
|
|
!= sizeof (__kernel_mode_t))
|
|
arg->shm_perm.mode &= 0xFFFF;
|
|
#endif
|
|
|
|
#if __IPC_TIME64
|
|
kshmid64_to_shmid64 (arg, buf);
|
|
#endif
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#if __TIMESIZE != 64
|
|
libc_hidden_def (__shmctl64)
|
|
|
|
static void
|
|
shmid_to_shmid64 (struct __shmid64_ds *shm64, const struct shmid_ds *shm)
|
|
{
|
|
shm64->shm_perm = shm->shm_perm;
|
|
shm64->shm_segsz = shm->shm_segsz;
|
|
shm64->shm_atime = shm->shm_atime
|
|
| ((__time64_t) shm->__shm_atime_high << 32);
|
|
shm64->shm_dtime = shm->shm_dtime
|
|
| ((__time64_t) shm->__shm_dtime_high << 32);
|
|
shm64->shm_ctime = shm->shm_ctime
|
|
| ((__time64_t) shm->__shm_ctime_high << 32);
|
|
shm64->shm_cpid = shm->shm_cpid;
|
|
shm64->shm_lpid = shm->shm_lpid;
|
|
shm64->shm_nattch = shm->shm_nattch;
|
|
}
|
|
|
|
static void
|
|
shmid64_to_shmid (struct shmid_ds *shm, const struct __shmid64_ds *shm64)
|
|
{
|
|
shm->shm_perm = shm64->shm_perm;
|
|
shm->shm_segsz = shm64->shm_segsz;
|
|
shm->shm_atime = shm64->shm_atime;
|
|
shm->__shm_atime_high = 0;
|
|
shm->shm_dtime = shm64->shm_dtime;
|
|
shm->__shm_dtime_high = 0;
|
|
shm->shm_ctime = shm64->shm_ctime;
|
|
shm->__shm_ctime_high = 0;
|
|
shm->shm_cpid = shm64->shm_cpid;
|
|
shm->shm_lpid = shm64->shm_lpid;
|
|
shm->shm_nattch = shm64->shm_nattch;
|
|
}
|
|
|
|
int
|
|
__shmctl (int shmid, int cmd, struct shmid_ds *buf)
|
|
{
|
|
struct __shmid64_ds shmid64, *buf64 = NULL;
|
|
if (buf != NULL)
|
|
{
|
|
/* This is a Linux extension where kernel expects either a
|
|
'struct shminfo' (IPC_INFO) or 'struct shm_info' (SHM_INFO). */
|
|
if (cmd == IPC_INFO || cmd == SHM_INFO)
|
|
buf64 = (struct __shmid64_ds *) buf;
|
|
else
|
|
{
|
|
shmid_to_shmid64 (&shmid64, buf);
|
|
buf64 = &shmid64;
|
|
}
|
|
}
|
|
|
|
int ret = __shmctl64 (shmid, cmd, buf64);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
switch (cmd)
|
|
{
|
|
case IPC_STAT:
|
|
case SHM_STAT:
|
|
case SHM_STAT_ANY:
|
|
shmid64_to_shmid (buf, buf64);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#ifndef DEFAULT_VERSION
|
|
# ifndef __ASSUME_SYSVIPC_BROKEN_MODE_T
|
|
# define DEFAULT_VERSION GLIBC_2_2
|
|
# else
|
|
# define DEFAULT_VERSION GLIBC_2_31
|
|
# endif
|
|
#endif
|
|
|
|
versioned_symbol (libc, __shmctl, shmctl, DEFAULT_VERSION);
|
|
|
|
#if defined __ASSUME_SYSVIPC_BROKEN_MODE_T \
|
|
&& SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_31)
|
|
int
|
|
attribute_compat_text_section
|
|
__shmctl_mode16 (int shmid, int cmd, struct shmid_ds *buf)
|
|
{
|
|
return shmctl_syscall (shmid, cmd, (shmctl_arg_t *) buf);
|
|
}
|
|
compat_symbol (libc, __shmctl_mode16, shmctl, GLIBC_2_2);
|
|
#endif
|
|
|
|
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
|
|
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 */
|
|
};
|
|
|
|
int
|
|
attribute_compat_text_section
|
|
__old_shmctl (int shmid, int cmd, struct __old_shmid_ds *buf)
|
|
{
|
|
#if defined __ASSUME_DIRECT_SYSVIPC_SYSCALLS \
|
|
&& !defined __ASSUME_SYSVIPC_DEFAULT_IPC_64
|
|
/* For architecture that have wire-up shmctl but also have __IPC_64 to a
|
|
value different than default (0x0), it means the compat symbol used the
|
|
__NR_ipc syscall. */
|
|
return INLINE_SYSCALL_CALL (shmctl, shmid, cmd, buf);
|
|
#else
|
|
return INLINE_SYSCALL_CALL (ipc, IPCOP_shmctl, shmid, cmd, 0, buf);
|
|
#endif
|
|
}
|
|
compat_symbol (libc, __old_shmctl, shmctl, GLIBC_2_0);
|
|
#endif
|