Actually, you can still redirect or pipe stderr, but not stdout, since there will not be any standard output — it's being internally piped to the lp process using the popen function.
实际上,您仍然可以对标准错误使用重定向或管道命令,但不能对标准输出使用,因为没有任何标准输出—正在内部使用popen函数由管道将它输送至lp进程。
WriteContents is called to write the contents of the file to standard output, which it does by calling the fpassthru function in PHP.
调用writeContents以将文件内容写到标准输出,在php中通过调用fpassthru函数实现该功能。
It also sets some default values for the script, and then parses the command-line arguments using the standard Bash shell's getopt function. (Listing 7 shows the output of this usage message.)
它还为此脚本设置了某些默认值,然后使用标准的Bashshell的getopt函数解析这些命令行参数(清单7给出了这个使用消息的输出)。
This function is typically used to open a specified file as one of the predefined streams: standard input, standard output, or standard error.
这个函数通常用于打开一个指定的文件使用预先定义的流:标准输入,标准输出,标准错误。
This thesis analyzes function and operation principle of intelligent pansducer. The pansducer is designed chiefly for different weak output signal of non-standard sensors.
本文分析了智能变送器的作用和工作原理,针对应用中使用的不同的传感器输出不同幅值的弱直流电信号的要求,设计了智能变送器系统。
This thesis analyzes function and operation principle of intelligent transducer. The transducer is designed chiefly for different weak output signal of non-standard sensors.
本文分析了智能变送器的作用和工作原理,针对应用中使用的不同的传感器输出不同幅值的弱直流电信号的要求,设计了智能变送器系统。
This thesis analyzes function and operation principle of intelligent transducer. The transducer is designed chiefly for different weak output signal of non-standard sensors.
本文分析了智能变送器的作用和工作原理,针对应用中使用的不同的传感器输出不同幅值的弱直流电信号的要求,设计了智能变送器系统。
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