89 lines
3.2 KiB
C++
89 lines
3.2 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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struct kernel_stat {
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unsigned int st_dev;
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unsigned int st_pad0[3];
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unsigned long st_ino;
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mode_t st_mode;
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__u32 st_nlink;
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uid_t st_uid;
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gid_t st_gid;
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unsigned int st_rdev;
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unsigned int st_pad1[3];
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__kernel_off_t st_size;
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unsigned int _st_atime;
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unsigned int st_atime_nsec;
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unsigned int _st_mtime;
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unsigned int st_mtime_nsec;
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unsigned int _st_ctime;
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unsigned int st_ctime_nsec;
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unsigned int st_blksize;
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unsigned int st_pad2;
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unsigned long st_blocks;
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};
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static void copy_stat(struct stat* st, struct kernel_stat* s) {
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st->st_dev = static_cast<dev_t>(s->st_dev);
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st->st_ino = static_cast<ino_t>(s->st_ino);
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st->st_mode = static_cast<mode_t>(s->st_mode);
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st->st_nlink = static_cast<nlink_t>(s->st_nlink);
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st->st_uid = static_cast<uid_t>(s->st_uid);
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st->st_gid = static_cast<gid_t>(s->st_gid);
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st->st_rdev = static_cast<dev_t>(s->st_rdev);
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st->st_size = static_cast<off_t>(s->st_size);
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st->st_blksize = static_cast<int>(s->st_blksize);
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st->st_blocks = static_cast<long>(s->st_blocks);
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st->st_atim.tv_sec = static_cast<time_t>(s->_st_atime);
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st->st_atim.tv_nsec = static_cast<long>(s->st_atime_nsec);
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st->st_mtim.tv_sec = static_cast<time_t>(s->_st_mtime);
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st->st_mtim.tv_nsec = static_cast<long>(s->st_mtime_nsec);
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st->st_ctim.tv_sec = static_cast<time_t>(s->_st_ctime);
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st->st_ctim.tv_nsec = static_cast<long>(s->st_ctime_nsec);
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}
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int fstat(int fp, struct stat* st) {
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kernel_stat s;
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int ret = syscall(__NR_fstat, fp, &s);
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copy_stat(st, &s);
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return ret;
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}
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__strong_alias(fstat64, fstat);
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int fstatat(int dirfd, const char* pathname, struct stat* buf, int flags) {
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kernel_stat s;
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int ret = syscall(__NR_newfstatat, dirfd, pathname, &s, flags);
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copy_stat(buf, &s);
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return ret;
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}
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__strong_alias(fstatat64, fstatat);
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