文件系统操作函数：用于创建常规文件、目录和符号链接；复制和重命名文件；提供删除功能。
File system-manipulation functions: Meant to create regular files, directories, and symbolic links; copy and rename files; and provide for deletion.
这包括在代码中不同函数边界由操作系统实现的那些探测。
Those exposed by the operating system on the boundary of different functions within the code are covered.
处理操作系统级信息(比如说内存中的锁定对象)的函数名是以OS开头的。
Functions that deal with operating system level information (such as locking objects in memory) have names beginning with OS.
包装器函数将执行它认为需要的操作，以假装执行了正确的底层系统调用。
The wrapper function does whatever it thinks it needs to in order to pretend to have made the right underlying system call.
在这些情况下，无论是SquirrelShell还是您都无法脱离平台，Squirrel Shell提供了一个方便的函数来探测操作系统，这样代码就可以适当的执行。
In those cases where neither Squirrel Shell nor you can abstract the platform away, Squirrel Shell provides a handy function to probe the operating system so code can follow an appropriate branch.
exec—这个方便的php函数发送一个字符串供操作系统的命令行处理。
Exec -this handy PHP function sends a string for the operating system's command line to process.
DataBladeAPI提供一些函数来写入操作系统文件。
The DataBlade API provides functions to write to operating system files.
如果您的操作系统支持动态加载，那么Lua可以根据需要来动态加载并调用函数。
If your operating system supports dynamic loading, Lua can load and call functions on demand.
清单6.platform函数生成操作系统类型。
Listing 6. The platform function yields the type of operating system.
使用exec函数来向操作系统发送命令。
You use the exec function to send a command to the operating system. This command calls Scilab, just as you saw in the previous section
基于进入系统的时间，写操作具有幂等性(不管操作多少次结果都不变的性质，比如取绝对值的函数就具有幂等性)和交换性(操作顺序不影响结果，比如加法就具有交换性)。
Write operations are idempotent and commutative, based on the time they enter the system.
因为新功能要求调用每个操作系统的本机函数，所以这显然处在一个很艰难的位置上。
Because the new functionality requires calling native functions on every OS, that's a seemingly difficult position to be in.
两个函数（位于清单6 中）便利与系统剪贴板之间的复制操作，以便您在执行 “复制到” 操作时可以获取剪贴板中的内容。
Two functions (in Listing 6) facilitate copying to and from the system clipboard so when you perform a copy-to operation, you take the content from the clipboard.
JDIC组件代码本身指出正在哪个操作系统上运行应用程序，并调用适当的jni函数。
The JDIC component code itself figures out which OS the application is being run on and calls the appropriate JNI function.
操作可以是一个关系运算符，或者系统或用户定义的函数，也可以是一个sql操作符，例如GROUPBY、ORDER BY等。
An operation can be a relational operator, a system - or user-defined function, or an SQL operator, such as GROUP BY, ORDER BY, and so on.
当开发一个应用程序或者是其他的处于用户空间的程序时，开发者必须考虑其他人写的代码----操作系统，库函数，还有其他程序，等等。
When developing an application or other userspace program, the developer has to take into consideration the code written by others: the operating system, the libraries, other programs, etc.
这些操作并非都是必需的，但是一个文件系统要想正常工作，就需要其中的很多函数。
None of these operations are absolutely essential, but many are needed for a filesystem to work properly.
这个函数执行了大量的子系统初始化操作。
This function performs a large amount of subsystem initialization.
因为Perl足够灵活，可以适应不同执行操作系统命令的方法，因此有许多不同的核心函数和操作符。
Because Perl is flexible enough to accommodate different ways of executing operating system commands, there are many different core functions and operators used for that purpose.
一个操作系统典型地由一个函数调用集、软件中断和定期时钟周期组成。
An operating system typically consists of a set of function calls, or software interrupts, and a periodic clock tick.
表2列出了用来从perl脚本中调用系统命令的Perl核心函数和操作符。
Table 2 lists Perl core functions and operators leveraged to call system commands from within a Perl script.
简而言之，都是关于识别在含有特定Solaris系统命令的脚本中使用的Perl核心函数和操作符。
In short, it's all about identifying Perl core functions and operators leveraged in the script that carries Solaris-specific system commands.
如果其参数输入PATHNAME对于特定的操作系统或文件系统有效，名称检查函数将返回“True”。
The name-check function returns "True" if its argument input PATHNAME is valid for a particular operating system or file system.
其次，Linux系统调用基本上是一个函数，它属于操作系统代码的一部分。
Second, a Linux system call is basically a function that is a part of the operating system's code.
当通过 add_buf 向hypervisor 发出请求时，来宾操作系统能够通过kick函数通知hypervisor新的请求。
When a request has been made to the hypervisor through add_buf, the guest can notify the hypervisor of the new request using the kick function.
首先，类似于将用户空间应用程序和内核函数连接起来的系统调用，一个通常可用的虚拟化调用(hapercall, hypervisor对操作系统进行的系统调用)层允许来宾系统向宿主操作系统发出请求。
First, similar to system calls that bridge user-space applications with kernel functions, a hypercall layer is commonly available that allows guests to make requests of the host operating system.
NT系列的操作系统内部的字符串是Unicode型字符，ANSI型的Win32API函数实际上是Unicode版本的函数的包装。
The Windows NT family operates with Unicode strings internally. The ANSI version of a Win32 API function is a mere wrapper around the real worker – the Unicode version of a function.
性能分析工具确保优化工作花费在系统中最慢，影响大多数浏览器的地方，而不是去判定那些函数或操作缓慢。
Rather than assuming which functions or operations are slow, profilers ensure that optimization time is spent on the slowest areas of the system that affect the most browsers.
时钟计数函数返回你的操作系统的内部时钟的值，并且是以毫秒的形式；它通常被用于计算总共用时，入在接下来的练习中(见图6.54)。
Tick Count (ms) returns the value of your operating system's internal clock in milliseconds; it is commonly used to calculate elapsed time, as in the next activity (see Figure 6.54).
时钟计数函数返回你的操作系统的内部时钟的值，并且是以毫秒的形式；它通常被用于计算总共用时，入在接下来的练习中(见图6.54)。
Tick Count (ms) returns the value of your operating system's internal clock in milliseconds; it is commonly used to calculate elapsed time, as in the next activity (see Figure 6.54).
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