一、编译BASH实现bash的syslog日志记录功能
1. 本文将通过bash软件实现history记录到syslog日志的功能，并通过该方式可以实现实时的传送到了远端的日志集中服务器上，可以实现操作目志的审计功能。
操作系统版本 : CentOS 6.5 x64
2. 安装6.5对应bash源码包
# wget http://vault.centos.org/6.5/os/Source/SPackages/bash-4.1.2-15.el6.src.rpm
# rpm -i bash-4.1.2-15.el6_4.src.rpm
#安装报警告可以忽略。
warning: bash-4.1.2-15.el6_4.src.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY
warning: user mockbuild does not exist - using root
warning: group mockbuild does not exist - using root
warning: user mockbuild does not exist - using root
warning: group mockbuild does not exist - using root
warning: user mockbuild does not exist - using root
warning: group mockbuild does not exist - using root
warning: user mockbuild does not exist - using root
warning: group mockbuild does not exist - using root
warning: user mockbuild does not exist - using root
...
warning: group mockbuild does not exist - using root
warning: user mockbuild does not exist - using root
warning: group mockbuild does not exist - using root
warning: user mockbuild does not exist - using root
warning: group mockbuild does not exist - using root
warning: user mockbuild does not exist - using root
[root@localhost soft]#
安装完成后，会在当前用户主目录下创建如下目录结构。
[root@localhost ~]# pwd
/root
# ls
anaconda-ks.cfg bash-4.1.2-15.el6_4.src.rpm install.log install.log.syslog rpmbuild 公共的 模板 视频 图片 文档 下载 音乐 桌面
[root@localhost ~]# tree rpmbuild/
rpmbuild/
├── SOURCES
│ ├── bash-2.02-security.patch
│ ├── bash-2.03-paths.patch
│ ├── bash-2.03-profile.patch
│ ├── bash-2.05a-interpreter.patch
│ ├── bash-2.05b-debuginfo.patch
│ ├── bash-2.05b-manso.patch
│ ├── bash-2.05b-pgrp_sync.patch
│ ├── bash-2.05b-readline-oom.patch
│ ├── bash-2.05b-xcc.patch
│ ├── bash-3.2-audit.patch
│ ├── bash-3.2-ssh_source_bash.patch
│ ├── bash-4.0-nobits.patch
│ ├── bash41-001
│ ├── bash41-002
│ ├── bash-4.1-bind_int_variable.patch
│ ├── bash-4.1-broken_pipe.patch
│ ├── bash-4.1-defer-sigchld-trap.patch
│ ├── bash-4.1-examples.patch
│ ├── bash-4.1-logout.patch
│ ├── bash-4.1-manpage.patch
│ ├── bash-4.1-manpage_trap.patch
│ ├── bash-4.1-signal.patch
│ ├── bash-4.1.tar.gz
│ ├── bash-4.1-trap.patch
│ ├── bash-bashbug.patch
│ ├── bash-infotags.patch
│ ├── bash-requires.patch
│ ├── bash-setlocale.patch
│ ├── bash-tty-tests.patch
│ ├── dot-bash_logout
│ ├── dot-bash_profile
│ └── dot-bashrc
└── SPECS
└── bash.spec
2 directories, 33 files
2. 进入目录中，解决bash-4.1源码包目录
[root@localhost ~]# cd /root/rpmbuild/SOURCES/
[root@localhost SOURCES]# tar zxvf bash-4.1.tar.gz
[root@localhost SOURCES]# cp -a bash-4.1 bash-4.1-orig
[root@localhost SOURCES]#
[root@localhost SOURCES]# cd bash-4.1
[root@localhost bash-4.1]#
3. 修改代码段一
# vim config-top.h
#取消104行的注释,并将下面代码修改为如下内容，默认情况下日志记录在/var/log/message文件中，这调整为local1.debug指定的文件中。
/* #define SYSLOG_HISTORY */
#if defined (SYSLOG_HISTORY)
# define SYSLOG_FACILITY LOG_LOCAL1
# define SYSLOG_LEVEL LOG_DEBUG
#endif
4. 修改代码段二
# vim bashhist.c
#找到701行开始的程序段
701 void
702 bash_syslog_history (line)
703 const char *line;
704 {
705 char trunc[SYSLOG_MAXLEN];
706
707 if (strlen(line) < SYSLOG_MAXLEN)
708 syslog (SYSLOG_FACILITY|SYSLOG_LEVEL, "HISTORY: PID=%d UID=%d %s", getpid(), current_user.uid, line);
709 else
710 {
711 strncpy (trunc, line, SYSLOG_MAXLEN);
712 trunc[SYSLOG_MAXLEN - 1] = '\0';
713 syslog (SYSLOG_FACILITY|SYSLOG_LEVEL, "HISTORY (TRUNCATED): PID=%d UID=%d %s", getpid(), current_user.uid, trunc);
714 }
715 }
716 #endif
修改为如下内容：
void
bash_syslog_history (line)
const char *line;
{
char trunc[SYSLOG_MAXLEN];
if (strlen(line) < SYSLOG_MAXLEN)
syslog (SYSLOG_FACILITY|SYSLOG_LEVEL, "HISTORY: PPID=%d PID=%d SID=%d UID=%d User=%s %s", getppid(), getpid(), getsid(getpid()), current_user.uid, current_user.user_name, line);
else
{
strncpy (trunc, line, SYSLOG_MAXLEN);
trunc[SYSLOG_MAXLEN - 1] = '\0';
syslog (SYSLOG_FACILITY|SYSLOG_LEVEL, "HISTORY (TRUNCATED): PPID=%d PID=%d SID=%d UID=%d User=%s %s", getppid(), getpid(), getsid(getpid()), current_user.uid, current_user.user_name, trunc);
}
}
5. 对比修改代码
[root@localhost SOURCES]# diff -Npru bash-4.1-orig bash-4.1 > bash_history_syslog.patch
# cd ~/rpmbuild/SPECS/
# vim bash.spec
#加入两行内容，按如下格式如下，保存退出。
Patch119: bash_history_syslog.patch
…
%patch119 -p1 -b .history_syslog
…
6. 开始编译
[root@localhost SPECS]# rpmbuild -ba bash.spec
error: Failed build dependencies:
texinfo is needed by bash-4.1.2-15.el6.x86_64
再开一个窗口安装texinfo软件包。
[root@localhost SPECS]# rpmbuild -ba bash.spec
[root@localhost SPECS]# cd ~/rpmbuild/RPMS/x86_64/
7. 安装bash rpm安装包
[root@localhost ~]# cd ~/rpmbuild/RPMS/x86_64/
[root@localhost x86_64]# ls
bash-4.1.2-15.el6.x86_64.rpm bash-debuginfo-4.1.2-15.el6.x86_64.rpm bash-doc-4.1.2-15.el6.x86_64.rpm
[root@localhost x86_64]#
[root@localhost x86_64]# rpm -Uvh --force bash-4.1.2-15.el6.x86_64.rpm
Preparing... ########################################### [100%]
1:bash ########################################### [100%]
[root@localhost x86_64]#
8. 配置rsyslog日志服务
[root@localhost x86_64]# vi /etc/rsyslog.conf
#加入如下内容：
local1.debug /var/log/bash
[root@localhost x86_64]# service rsyslog restart
关闭系统日志记录器： [确定]
启动系统日志记录器： [确定]
9. 查看日志记录，成功存储用户操作日志，与history日志分开存储，并且只有root权限可以操作该日志文件，如果配置日志服务器，操作日志将传送到远程服务器。
[root@localhost ~]# tail -f /var/log/bash
Apr 13 00:47:11 localhost bash: HISTORY: PPID=2471 PID=2473 SID=2473 UID=0 User=root ifconfig
Apr 13 00:47:12 localhost bash: HISTORY: PPID=2471 PID=2473 SID=2473 UID=0 User=root ls
Apr 13 00:47:13 localhost bash: HISTORY: PPID=2471 PID=2473 SID=2473 UID=0 User=root df -h
Apr 13 00:47:15 localhost bash: HISTORY: PPID=2471 PID=2473 SID=2473 UID=0 User=root history
Apr 13 00:47:24 localhost bash: HISTORY: PPID=2471 PID=2473 SID=2473 UID=0 User=root cat /var/log/bash
Apr 13 01:19:47 localhost bash: HISTORY: PPID=26139 PID=26141 SID=26141 UID=0 User=root cat /var/log/bash
Apr 13 01:19:57 localhost bash: HISTORY: PPID=26139 PID=26141 SID=26141 UID=0 User=root ifconfig
Apr 13 01:21:07 localhost -bash: HISTORY: PPID=26157 PID=26159 SID=26159 UID=0 User=root ifconfig
Apr 13 01:21:17 localhost -bash: HISTORY: PPID=26157 PID=26159 SID=26159 UID=0 User=root w
Apr 13 01:21:20 localhost -bash: HISTORY: PPID=26157 PID=26159 SID=26159 UID=0 User=root df -h
Apr 13 01:21:33 localhost -bash: HISTORY: PPID=26157 PID=26159 SID=26159 UID=0 User=root useradd abc
Apr 13 01:21:38 localhost -bash: HISTORY: PPID=26157 PID=26159 SID=26159 UID=0 User=root passwd abc
Apr 13 01:21:42 localhost -bash: HISTORY: PPID=26157 PID=26159 SID=26159 UID=0 User=root su - abc
Apr 13 01:21:44 localhost -bash: HISTORY: PPID=26192 PID=26193 SID=26159 UID=500 User=abc exit
二、rsyslog日志服务器配置
1. 日志服务器配置
# vi /etc/rsyslog.conf
将其中下面四行的注释取消
$ModLoad imudp
$UDPServerRun 514
$ModLoad imtcp
$InputTCPServerRun 514
在#### GLOBAL DIRECTIVES ####中加入如下内容：
$template IpTemplate,"/var/log/%FROMHOST-IP%.log"
*.* ?IpTemplate
& ~
说明：实现在接收远程的日志为客户端IP地址命名。
然后重新启动rsyslogd服务
# service rsyslog restart
2. 日志客户端配置
# vi /etc/rsyslog.conf
local1.debug @@192.168.0.66
# 然后重新启动rsyslogd服务
# service rsyslog restart
3. 查看结果，已经可以接收结果了。
[root@testdb log]# cd /var/log
[root@testdb log]# ll
908
-rw------- 1 root root 1718 412 09:51 127.0.0.1.log
-rw------- 1 root root 272 412 09:43 192.168.0.65.log
-rw------- 1 root root 3754 412 09:51 66_history_bash
-rw-------. 1 root root 2368 109 16:55 anaconda.ifcfg.log
-rw-------. 1 root root 29331 109 16:55 anaconda.log
[root@testdb log]# tail -f 192.168.0.65.log
Apr 13 17:41:13 localhost -bash: HISTORY: PPID=2166 PID=2168 SID=2168 UID=0 User=root 192.168
Apr 13 17:42:40 localhost -bash: HISTORY: PPID=2166 PID=2168 SID=2168 UID=0 User=root sss
Apr 13 17:43:38 localhost -bash: HISTORY: PPID=2166 PID=2168 SID=2168 UID=0 User=root s
Apr 13 17:52:27 localhost -bash: HISTORY: PPID=2166 PID=2168 SID=2168 UID=0 User=root ifconfig
Apr 13 17:52:27 localhost -bash: HISTORY: PPID=2166 PID=2168 SID=2168 UID=0 User=root w
本文出自 “koumm的linux技术博客” 博客，请务必保留此出处http://koumm.blog.51cto.com/703525/1763145
