php system命令在网页和命令行下执行结果不一致
大家好,现在我有一个文件a.php.内容是:
- PHP code
<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ --> $str = " /opt/rpm/bin/rpm -bb --target i686--linux /tmp/test.spec"; system($str); ?>
当我用http://192.168.1.1/a.php 执行的时候结果显示:
- HTML code
<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ -->Building target platforms: i686--linux Building for target i686--linux Processing files: VTCUAL06.06C.P010-R1.0-P1
当我在命令行下用/usr/local/php a.php 执行的时候,结果显示:
- HTML code
<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ --> Building target platforms: i686--linux Building for target i686--linux Processing files: VTCUAL06.06C.P010-R1.0-P1 Finding Provides: (using /opt/rpm/lib/rpm/find-provides)... Finding Requires: (using /opt/rpm/lib/rpm/find-requires)... Wrote: /export/home/webadm/.rpm/RPMS/i686/VTCUA
也就是说在http访问模式下有三行没有显示出来:
- HTML code
<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ --> Finding Provides: (using /opt/rpm/lib/rpm/find-provides)... Finding Requires: (using /opt/rpm/lib/rpm/find-requires)... Wrote: /export/home/webadm/.rpm/RPMS/i686/VTCUA
有人知道是什么原因吗?谢谢了!!
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这个问题好奇怪~~~~
有牛人知道吗?
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一点不奇怪,执行用户不同而已。命令行执行的是root,网页执行的是apache用户。
google了一下,说apache带--enable-suexec编译就可以,但是没试过。
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这是不可能的。
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看看以 php 命令行方式执行你的程序的结果
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噢,没注意
这显然是用于权限的问题了
web 方式下的 php 只是匿名用户,只有最低的权限
话说回来,如果什么都可以通过浏览器去操控,那么系统哪有安全性可言
想当初微软为了提供便利的数据查询,给 mssql2000 附加了 url 查询功能
结果不就被人利用,而成了臭名昭著的 SQL攻击
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都说了是权限问题,你加了sudo了没,结果怎样?
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应该有的,如果没有你wget下载安装一个。
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后面没有输出我怀疑可能出错了,你试试看一下代码,然后告诉我结果。
function my_exec($cmd, $input='')
{$proc=proc_open($cmd, array(0=>array('pipe', 'r'), 1=>array('pipe', 'w'), 2=>array('pipe', 'w')), $pipes);
fwrite($pipes[0], $input);fclose($pipes[0]);
$stdout=stream_get_contents($pipes[1]);fclose($pipes[1]);
$stderr=stream_get_contents($pipes[2]);fclose($pipes[2]);
$rtn=proc_close($proc);
return array('stdout'=>$stdout,
'stderr'=>$stderr,
'return'=>$rtn
);
}
$str = " /opt/rpm/bin/rpm -bb --target i686--linux /tmp/test.spec";
var_export(my_exec($str));
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