• centos7安装ext3grep


    前言

    在平常我们手机里面删除一个文件,其实文件时并没有被真正删除的,它只是被贴上了一个标记,标记为可被覆盖,只是对于用户来说,它变得不可见了,当有的新的数据进来时则有可能覆盖掉原来的被删除的文件,那么此时该文件才是真正意义上的被删除,如果我们将被删除但还没有被覆盖的文件的标记改回来并恢复文件,那么这个操作即为恢复文件。
    ext3grep就是这么一个工具。

    安装

    安装前准备,输入以下命令检测环境是否ok:

    rpm -qa|grep e2fs
    

    必须有以下三个依赖库:

    我使用的腾讯云,检查的时候就只e2fsprogs-devel没有,直接使用yum安装即可: yum install -y e2fsprogs-devel

    首先去官网(https://code.google.com/archive/p/ext3grep/downloads—)下载压缩包:
    这里也给出一个蓝奏云链接方便读者下载,蓝奏云,密码cp9b

    先解压:

    tar zxf ext3grep-0.10.2.tar.gz
    

    进入目录:

    cd ext3grep-0.10.2
    

    环境配置:

    ./configure
    

    遇到以下提示:

    checking for a BSD-compatible install... /usr/bin/install -c
    checking whether build environment is sane... yes
    checking for a thread-safe mkdir -p... /usr/bin/mkdir -p
    checking for gawk... gawk
    checking whether make sets $(MAKE)... yes
    checking whether to enable maintainer-specific portions of Makefiles... no
    checking for gcc... gcc
    checking whether the C compiler works... yes
    checking for C compiler default output file name... a.out
    checking for suffix of executables...
    checking whether we are cross compiling... no
    checking for suffix of object files... o
    checking whether we are using the GNU C compiler... yes
    checking whether gcc accepts -g... yes
    checking for gcc option to accept ISO C89... none needed
    checking for style of include used by make... GNU
    checking dependency style of gcc... pch
    checking for g++... no
    checking for c++... no
    checking for gpp... no
    checking for aCC... no
    checking for CC... no
    checking for cxx... no
    checking for cc++... no
    checking for cl.exe... no
    checking for FCC... no
    checking for KCC... no
    checking for RCC... no
    checking for xlC_r... no
    checking for xlC... no
    checking whether we are using the GNU C++ compiler... no
    checking whether g++ accepts -g... no
    checking dependency style of g++... none
    checking how to run the C++ preprocessor... /lib/cpp
    configure: error: in /root/ext3grep-0.10.2': configure: error: C++ preprocessor "/lib/cpp" fails sanity check See config.log' for more details.

    就算前面咱看不懂,但是最后三排,有两个error,那自然是有问题的

    继续面向百度解决问题,原来要安装c艹:

    yum install -y gcc-c++
    

    再make预编译时遭遇以下报错:

    make all-recursive
    make[1]: Entering directory /root/ext3grep-0.10.2' Making all in src make[2]: Entering directory /root/ext3grep-0.10.2/src'
    g++ -Iempty.pch.h -DHAVE_CONFIG_H -I. -I.. -g -O2 -DUSE_MMAP=1 -I/usr/include/ext2fs -I/usr/include/et -include pch.h
    -c -o pch.h.gch/6145d4709c827f9d2a94d7691c87ab4e ./pch-source.h
    In file included from ./pch-source.h:43:0:
    ./ext3.h: In member function ‘__u32 Inode::reserved2() const’:
    ./ext3.h:113:42: error: ‘i_reserved2’ was not declared in this scope
    __u32 reserved2(void) const { return i_reserved2; }
    ^
    ./ext3.h: In member function ‘void Inode::set_reserved2(__u32)’:
    ./ext3.h:115:37: error: ‘i_reserved2’ was not declared in this scope
    void set_reserved2(__u32 val) { i_reserved2 = val; }
    ^
    make[2]: *** [pch.h.gch/6145d4709c827f9d2a94d7691c87ab4e] Error 1
    make[2]: Leaving directory /root/ext3grep-0.10.2/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory /root/ext3grep-0.10.2'
    make: *** [all] Error 2

    进入src目录修改ext3.h文件即可,需要添加的地方有两处(添加的内容为彩虹代码块):
    第一处:
    #ifndef EXT3_H
    #define EXT3_H

    #ifdef _LINUX_EXT2_FS_H
    #error please include this file before any other includes of ext2fs/ext2_fs.h
    #endif
    #define s_clusters_per_group s_frags_per_group
    

    第二处:
    __u32 faddr(void) const { return i_faddr; }
    __u16 uid_high(void) const { return i_uid_high; }
    __u16 gid_high(void) const { return i_gid_high; }

    #ifndef i_reseved2
    #define i_reserved2 osd2.hurd2.h_i_author
    #endif
    

    读者也可参考该文章https://blog.csdn.net/dizui6048/article/details/101943111

    随后再执行make和make install即可
    安装好后可以使用ext3grep -v检查是否安装成功,成功后如下:

    致歉

    为之前看到此篇教程的朋友们致以真诚的道歉,时至今日,2021.4.4,回首看这篇教程我才发现前面,第一处该添加的内容少了一行:#define s_clusters_per_group s_frags_per_group
    。所以导致跟着此教程走,ext3grep安装失败,现在已经修改好了,确认教程没有问题了。以后我会在写博文时更加仔细,谨慎,以后还请大家多多指正。

    作者:
    除特别声明为原创博文外,均可转载,也欢迎转载,未经作者同意必须在文章页面给出原文链接,否则保留追究法律责任的权利,谢谢您的配合。
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  • 原文地址:https://www.cnblogs.com/sillage/p/14491434.html
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