急100积分!!命名管道的问题
命名管道,读写分别为reader.php和writer.php(代码见下文)。
现在我需要通过浏览器来执行writer.php来向管道写数据,在shell里执行reader.php来读数据。
问题是提示写成功,但读取不到数据。
php文档有提示说在安全模式下会检查双方的UID,但设置为一致(都是48)也不行,(文档显示安全模式在php 5.4.0已经移除了)。如果读写都通过浏览器或者shell是可以读写成功。
请问这是怎么回事?该如何解决?谢谢!
操作系统:CentOS 7.0 64位
php:5.6.0
reader.php
<?php$pipe = "/tmp/xpipe";$mode = 0600;//posix_setuid(8899);posix_setuid(48);if(!file_exists($pipe)) { echo "create pipe.\n"; umask(0); posix_mkfifo($pipe,$mode);}//posix_setuid(48);echo "posix uid: ".posix_getuid()."\n";echo "my uid: ".getmyuid()."\n";$f = fopen($pipe,"r");while(true){ $ret = stream_get_line($f, 1024, "\n"); if($ret != false){ echo $ret."\n"; }else{ usleep(100000); }}?>
writer.php
<?php$pipe = "/tmp/xpipe";$mode = 0600;//posix_setuid(8899);posix_setuid(48);if(!file_exists($pipe)) { umask(0); posix_mkfifo($pipe,$mode);}$f = fopen($pipe,"w");$msg = "some message [".Date("Y-m-d h:i:s")."]<br>\n";$ret = fwrite($f,$msg);echo "write pipe: ".$ret."<br>\n";fclose($f);//posix_setuid(48);echo "user: ".get_current_user()."<br>\n";echo "posix uid: ".posix_getuid()."<br>\n";echo "my uid: ".getmyuid()."<br>\n";echo $msg;?>
回复讨论(解决方案)
$mode = 0600; ?应该是不对的
至少应为 0644
我用相同的用户分别执行reader.php和writer.php
执行结果是成功的
$mode = 0600; ?应该是不对的
至少应为 0644
zuning老师一直都在论坛很活跃, 怎么又这么多时间啊, 你是做什么工作的?
web 方式的 php 和 shell 中的 php,怎么会是一个用户呢?
退休了,赋闲在家
$mode = 0600; ?应该是不对的
至少应为 0644
0666也试过,都不行。
用get_current_user和posix_getuid获取用户和uid都一样啊,奇了怪了
我用相同的用户分别执行reader.php和writer.php
执行结果是成功的
执行场景跟我一样?
晕~~~
环境1:
操作系统:CentOS 7.0
PHP: 5.6.0
Apache: 2.4.6
环境2:
操作系统:Ubuntu 13.10
PHP: 5.5.3
Apache: 2.4.6
"环境1"读写失败,"环境2"读写成功!!!!!!
谁能帮我解决下吗?我的实际运行环境是"环境1".
晕~~~
环境1:
操作系统:CentOS 7.0
PHP: 5.6.0
Apache: 2.4.6
环境2:
操作系统:Ubuntu 13.10
PHP: 5.5.3
Apache: 2.4.6
"环境1"读写失败,"环境2"读写成功!!!!!!
谁能帮我解决下吗?我的实际运行环境是"环境1".
查看一下/var/log/security,RH系列一般是SELinux权限没有解决
晕~~~
环境1:
操作系统:CentOS 7.0
PHP: 5.6.0
Apache: 2.4.6
环境2:
操作系统:Ubuntu 13.10
PHP: 5.5.3
Apache: 2.4.6
"环境1"读写失败,"环境2"读写成功!!!!!!
谁能帮我解决下吗?我的实际运行环境是"环境1".
查看一下/var/log/security,RH系列一般是SELinux权限没有解决
SELinux没启用,一直是关闭的。这玩意儿对php影响挺大,之前一个什么问题害得我查了半天,后来就干脆彻底关闭了。
开启display_errors,同时查看一下系统/PHP/Apache/安全类日志,失败总会留下日志的,这种无名的错误日志是最好的突破点
??是?限的??,另外你要考?一下???案的所?用?是否和apache的所?用?相同,只要?限足??且?於同一?用?就??是???的
若?是找不出???的?,你就改一下error的??等?,捕捉???容看看
??是?限的??,另外你要考?一下???案的所?用?是否和apache的所?用?相同,只要?限足??且?於同一?用?就??是???的
若?是找不出???的?,你就改一下error的??等?,捕捉???容看看
权限在代码里已经设置了啊,日志全打开了,也没见任何提示。怀疑是CentOS的问题,但又不知道在哪。
操作系统的原因,在centos7下必须都通过web方式,你可以在shell下用curl发起一个web请求来启用管道的另一端

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.
