Returns the string value assigned to a system environment variable
(getenv variable-name)
Arguments
variable-name
A string specifying the name of the variable to be read. Environment variable names must be spelled and cased exactly as they are stored in the system registry.
Return Values
A string representing the value assigned to the specified system variable. If the variable does not exist, getenv returns nil.
Examples
Assume the system environment variable ACAD is set to /acad/support and there is no variable named NOSUCH.
Command: (getenv "ACAD")
"/acad/support"
Command: (getenv "NOSUCH")
nil
Assume that the MaxArray environment variable is set to 10000:
Command: (getenv "MaxArray")
"10000"
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System
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系统相关
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(getenv "ComputerName")
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字符串-计算机名
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(getenv "COMSPEC")
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字符串-Cmd.exe路径
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(getenv "MaxArray")
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整数-最大排列
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(getenv "OS")
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字符串-操作系统
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(getenv "Path")
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字符串-系统搜索路径
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(getenv "Pathext")
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字符串-执行语句扩展名
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(getenv "SystemDrive")
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字符串-系统驱动器
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(getenv "SystemRoot")
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字符串-系统根路径
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(getenv "Temp")
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字符串-临时路径
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(getenv "TMP")
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字符串-临时路径
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(getenv "UserName")
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字符串-用户登录名称
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(getenv "UserProfile")
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字符串-当前用户配置文件路径
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(getenv "Windir")
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字符串-Windows路径
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posted on 2008-03-18 17:29
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