Linux：CentOS 查看命令源码

╰+哭是因爲堅強的太久メ 2022-03-17 15:45 304阅读 0赞

\# yum install yum-utils  
设置源:

[base-src]
    name=CentOS-5.4 - Base src -
    baseurl=http://vault.centos.org/5.4/os/SRPMS/
    #mirrorlist=http://mirrorlist.centos.org/?release=5.4&arch=SRPMS&repo=os
    gpgcheck=1
    gpgkey=http://vault.centos.org/RPM-GPG-KEY-CentOS-5
    
    
    [updates-src]
    name=CentOS-5.4 - Updates src-centos
    baseurl=http://vault.centos.org/5.4/updates/SRPMS/
    #mirrorlist=http://mirrorlist.centos.org/?release=5.4&arch=SRPMS&repo=updates
    gpgcheck=1
    gpgkey=http://vault.centos.org/RPM-GPG-KEY-CentOS-5
    
    
    #packages used/produced in the build but not released
    [addons-src]
    name=CentOS-5.4 - Addons src -
    baseurl=http://vault.centos.org/5.4/addons/SRPMS/
    #mirrorlist=http://mirrorlist.centos.org/?release=5.4&arch=SRPMS&repo=addons
    gpgcheck=1
    gpgkey=http://vault.centos.org/RPM-GPG-KEY-CentOS-5
    
    
    #additional packages that may be useful
    [extras-src]
    name=CentOS-5.4 - Extras src-centos
    baseurl=http://vault.centos.org/5.4/extras/SRPMS/
    #mirrorlist=http://mirrorlist.centos.org/?release=5.4&arch=SRPMS&repo=extras
    gpgcheck=1
    gpgkey=http://vault.centos.org/RPM-GPG-KEY-CentOS-5
    
    
    #additional packages that extend functionality of existing packages
    [centosplus-src]
    name=CentOS-5.4 - Plus src-centos
    baseurl=http://vault.centos.org/5.4/centosplus/SRPMS/
    #mirrorlist=http://mirrorlist.centos.org/?release=5.4&arch=SRPMS&repo=centosplus
    gpgcheck=1
    enabled=0
    gpgkey=http://vault.centos.org/RPM-GPG-KEY-CentOS-5
    
    
    #contrib - packages by Centos Users
    [contrib-src]
    name=CentOS-5.4 - Contrib src-centos
    baseurl=http://vault.centos.org/5.4/contrib/SRPMS/
    #mirrorlist=http://mirrorlist.centos.org/?release=5.4&arch=SRPMS&repo=contrib
    gpgcheck=1
    enabled=0
    gpgkey=http://vault.centos.org/RPM-GPG-KEY-CentOS-5

怎么查看某个命令的源代码

比如想查看uname这个命令的源代码

[root@localhost usr]# whereis uname
    
    uname: /bin/uname /usr/share/man/man1/uname.1.gz /usr/share/man/man2/uname.2.gz /usr/share/man/man1p/uname.1p.gz /usr/share/man/man3p/uname.3p.gz
    
    [root@localhost usr]# rpm -qf /bin/uname
    
    coreutils-8.5-7.fc14.i686
    
    ##没有yumdownloader 的话可以这样子安装#yum install yum-utils
    
    [workhard@localhost tmp]$ yumdownloader --source coreutils-8.5-7.fc14.i686 ##source下载源码包

到这一步后有两种方法可以查看到源码包,第一种方法

[workhard@localhost tmp]$ rpm -qpl coreutils-8.5-7.fc14.src.rpm | grep tar ##查询rpm中的tar文件，源码一般放在这里
    
    coreutils-8.5.tar.xz
    
    ##从rpm包中提取指定的文件
    
    [workhard@localhost tmp]$ rpm2cpio coreutils-8.5-7.fc14.src.rpm | cpio -idv coreutils-8.5.tar.xz
    
    coreutils-8.5.tar.xz
    
    9446 blocks
    
    [workhard@localhost coreutils-8.5]$ tar xjvf coreutils-8.5.tar.xz
    
    ##到解压出来的coreutils-8.5/src/中就能找到相关的源码了

第二种方法：安装源码包

[workhard@localhost tmp]$ rpm -i coreutils-8.5-7.fc14.src.rpm ##安装源码包
    
    warning: user mockbuild does not exist - using root
    
    warning: group mockbuild does not exist - using root
    
    ##centos和rhel一般安装后的源码在/usr/src/redhat下的各个目录下,但fedora是在~/rpmbuild/SOURCES/
    
    ##可以通过locate命令查询代码包被安装到哪里了
    
    [workhard@localhost tmp]$ locate *coreutils*tar*
    
    /home/workhard/tmp/coreutils-8.5.tar.xz
    
    /home/workhard/rpmbuild/SOURCES/coreutils-8.5.tar.xz
    
    [workhard@localhost tmp]$ cd /home/workhard/rpmbuild/SOURCES/c
    
    [workhard@localhost SOURCES]$ tar Jxvf coreutils-8.5.tar.xz
    
    [workhard@localhost src]$ cd coreutils-8.5/src/
    
    [workhard@localhost src]$ ll uname*
    
    -rw-r--r--. 1 workhard workhard 48 Jan 1 2010 uname-arch.c
    
    -rw-r--r--. 1 workhard workhard 10024 Jan 1 2010 uname.c
    
    -rw-r--r--. 1 workhard workhard 146 Jan 1 2010 uname.h
    
    -rw-r--r--. 1 workhard workhard 49 Jan 1 2010 uname-uname.c

安装\*.src.rpm后怎么卸载

[workhard@localhost SOURCES]$ cd /home/workhard/rpmbuild/SOURCES
    
    [workhard@localhost SPECS]$ rpmbuild --rmsource --rmspec coreutils.spec

\*\*相关说明

一、yumdownloader comes from the yum-utils package, if you don't have that installed already.

\#yum install yum-utils

二、RPM用法

rpm \{-i|--install\} \[install-options\] PACKAGE\_FILE ...

\-f, --file FILE

Query package owning FILE.

\-p, --package PACKAGE\_FILE

Query an (uninstalled) package PACKAGE\_FILE.

\-l, --list

List files in package.

－qf：查找指定文件属于哪个RPM软件包

－qpl：列出RPM软件包内的文件信息；

三、rpm2cpio - Extract cpio archive from RPM Package Manager (RPM) package.

[顾名思义][Link 1]，rpm2cpio是将rpm包[文件转换][Link 2]成cpio归档文件

四、CPIO用法

cpio - copy files to and from archives

\-i 抽取的意思，和"--extract"等同

\-d 建立目录，和"--make-directories"等同

\-v 冗余信息输出，和"--verbose"等同

五、rpmbuild用法

\--rmsource

Remove the sources after the build

\--rmspec

Remove the spec file after the build

[Link 1]: https://www.baidu.com/s?wd=%E9%A1%BE%E5%90%8D%E6%80%9D%E4%B9%89&tn=24004469_oem_dg&rsv_dl=gh_pl_sl_csd
[Link 2]: https://www.baidu.com/s?wd=%E6%96%87%E4%BB%B6%E8%BD%AC%E6%8D%A2&tn=24004469_oem_dg&rsv_dl=gh_pl_sl_csd