b115aefbb3
Strictly, the mode isn't really meaningful unless you supply O_EXCL, but the kernel will take it and fstat will return it even if you never give the file a name. Also warn for O_TMPFILE without a mode at compile time where possible. Bug: N/A Test: ran tests Change-Id: I729b6d6e6190676fd017a1190b6200bf9abdbfd8
91 lines
3 KiB
C++
91 lines
3 KiB
C++
/*
|
|
* Copyright (C) 2008 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <fcntl.h>
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "private/bionic_fortify.h"
|
|
|
|
extern "C" int __openat(int, const char*, int, int);
|
|
|
|
static inline int force_O_LARGEFILE(int flags) {
|
|
#if defined(__LP64__)
|
|
return flags; // No need, and aarch64's strace gets confused.
|
|
#else
|
|
return flags | O_LARGEFILE;
|
|
#endif
|
|
}
|
|
|
|
static inline bool needs_mode(int flags) {
|
|
return ((flags & O_CREAT) == O_CREAT) || ((flags & O_TMPFILE) == O_TMPFILE);
|
|
}
|
|
|
|
int creat(const char* pathname, mode_t mode) {
|
|
return open(pathname, O_CREAT | O_TRUNC | O_WRONLY, mode);
|
|
}
|
|
__strong_alias(creat64, creat);
|
|
|
|
int open(const char* pathname, int flags, ...) {
|
|
mode_t mode = 0;
|
|
|
|
if (needs_mode(flags)) {
|
|
va_list args;
|
|
va_start(args, flags);
|
|
mode = static_cast<mode_t>(va_arg(args, int));
|
|
va_end(args);
|
|
}
|
|
|
|
return __openat(AT_FDCWD, pathname, force_O_LARGEFILE(flags), mode);
|
|
}
|
|
__strong_alias(open64, open);
|
|
|
|
int __open_2(const char* pathname, int flags) {
|
|
if (needs_mode(flags)) __fortify_fatal("open: called with O_CREAT/O_TMPFILE but no mode");
|
|
return __openat(AT_FDCWD, pathname, force_O_LARGEFILE(flags), 0);
|
|
}
|
|
|
|
int openat(int fd, const char *pathname, int flags, ...) {
|
|
mode_t mode = 0;
|
|
|
|
if (needs_mode(flags)) {
|
|
va_list args;
|
|
va_start(args, flags);
|
|
mode = static_cast<mode_t>(va_arg(args, int));
|
|
va_end(args);
|
|
}
|
|
|
|
return __openat(fd, pathname, force_O_LARGEFILE(flags), mode);
|
|
}
|
|
__strong_alias(openat64, openat);
|
|
|
|
int __openat_2(int fd, const char* pathname, int flags) {
|
|
if (needs_mode(flags)) __fortify_fatal("open: called with O_CREAT/O_TMPFILE but no mode");
|
|
return __openat(fd, pathname, force_O_LARGEFILE(flags), 0);
|
|
}
|