130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
/*
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* Copyright (c) 2024 Alibaba Group Holding Limited. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include "export.h"
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#include <stdbool.h>
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#if defined(__linux__)
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <dlfcn.h>
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#ifndef STATX_BASIC_STATS
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#define STATX_BASIC_STATS 0x000007ffU
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#endif
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#ifndef STATX_BTIME
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#define STATX_BTIME 0x00000800U
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#endif
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#ifndef RTLD_DEFAULT
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#define RTLD_DEFAULT RTLD_LOCAL
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#endif
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#ifndef AT_SYMLINK_NOFOLLOW
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#define AT_SYMLINK_NOFOLLOW 0x100
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#endif
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#ifndef AT_FDCWD
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#define AT_FDCWD -100
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#endif
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#ifndef __GLIBC__
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// Alpine doesn't know these types, define them
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typedef unsigned int __uint32_t;
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typedef unsigned short __uint16_t;
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typedef unsigned long int __uint64_t;
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#endif
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/*
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* Timestamp structure for the timestamps in struct statx.
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*/
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struct my_statx_timestamp {
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int64_t tv_sec;
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__uint32_t tv_nsec;
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int32_t __reserved;
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};
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/*
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* struct statx used by statx system call on >= glibc 2.28
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* systems
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*/
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struct my_statx
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{
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__uint32_t stx_mask;
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__uint32_t stx_blksize;
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__uint64_t stx_attributes;
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__uint32_t stx_nlink;
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__uint32_t stx_uid;
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__uint32_t stx_gid;
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__uint16_t stx_mode;
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__uint16_t __statx_pad1[1];
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__uint64_t stx_ino;
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__uint64_t stx_size;
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__uint64_t stx_blocks;
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__uint64_t stx_attributes_mask;
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struct my_statx_timestamp stx_atime;
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struct my_statx_timestamp stx_btime;
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struct my_statx_timestamp stx_ctime;
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struct my_statx_timestamp stx_mtime;
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__uint32_t stx_rdev_major;
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__uint32_t stx_rdev_minor;
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__uint32_t stx_dev_major;
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__uint32_t stx_dev_minor;
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__uint64_t __statx_pad2[14];
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};
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typedef int statx_func(int dirfd, const char *restrict pathname, int flags,
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unsigned int mask, struct my_statx *restrict statxbuf);
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static statx_func* my_statx_func = NULL;
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#endif //#defined(__linux__)
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// static boolean linuxIsCreationTimeSupported(char* file)
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EXPORT bool linuxIsCreationTimeSupported(char* file) {
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#if defined(__linux__)
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struct my_statx stx = {0};
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int ret, atflag = AT_SYMLINK_NOFOLLOW;
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unsigned int mask = STATX_BASIC_STATS | STATX_BTIME;
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my_statx_func = (statx_func*) dlsym(RTLD_DEFAULT, "statx");
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if (my_statx_func == NULL) {
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return false;
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}
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if (file == NULL) {
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printf("input file error!\n");
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return false;
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}
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ret = my_statx_func(AT_FDCWD, file, atflag, mask, &stx);
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if (ret != 0) {
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return false;
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}
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// On some systems where statx is available but birth time might still not
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// be supported as it's file system specific. The only reliable way to
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// check for supported or not is looking at the filled in STATX_BTIME bit
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// in the returned statx buffer mask.
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if ((stx.stx_mask & STATX_BTIME) != 0)
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return true;
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return false;
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#else
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return false;
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#endif
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}
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