+
−.. -*- coding: utf-8; -*-
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−
+
−====================
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− CMD Windows shell.
+
−====================
+
−.. contents::
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−
+
−Quoting.
+
−========
+
−
+
− * Arguments are delimited by white space, which is either a space or a tab.
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− * A string surrounded by double quotation marks is interpreted as a single
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−   argument.
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− * A double quotation mark preceded by a backslash, \", is interpreted as a
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−   literal double quotation mark.
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− * Backslashes are interpreted literally, unless they immediately precede a
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−   double quotation mark.
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− * If an even number of backslashes is followed by a double quotation mark,
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−   then one backslash (\) is placed in the argv array for every pair of
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−   backslashes (\\), and the double quotation mark (") is interpreted as a
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−   string delimiter.
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− * If an odd number of backslashes is followed by a double quotation mark,
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−   then one backslash (\) is placed in the argv array for every pair of
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−   backslashes (\\) and the double quotation mark is interpreted as an escape
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−   sequence by the remaining backslash, causing a literal double quotation
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−   mark (") to be placed in argv.
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− * In double quote mark need surround such chars::
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−
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−     & < > [ ] { } ^ = ; ! ' + , ` ~ %
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−
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−   Also all this char can be escaped by ^ char.
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− * Long line can be truncated by ^ char, in this case trailing white spaces
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−   not allowed.
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− * To quote percent sign % before alpha char in batch file double it
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−   occurrences or plase in quotes::
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−
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−     prog '%'HOME'%' "%"HOME"%" %%HOME%
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−
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−  http://msdn.microsoft.com/en-us/library/ms880421.aspx
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−                Parsing C Command-Line Arguments
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−
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−Variables.
+
−==========
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−
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−Variable name start with letter and underscore, next chars can be letter,
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−number and underscore. Variable name is case insensitive.
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−
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−List of variables.
+
−------------------
+
−::
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−
+
−  cmd> set
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−  ...
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−  VAR=VALUE
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−
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−Getting.
+
−--------
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−
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−Write %VAR% in place where you want insert variable VAr value.
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−
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−Setting.
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−--------
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−::
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−
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−  cmd> set /p VAR=VALUE
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−
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−Deleting.
+
−---------
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−::
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−
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−  cmd> set VAR=
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−
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−Input from user.
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−----------------
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−::
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−
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−  cmd> set /p VAR=PROMPT
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−
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−VAR is variable name, PROMPT is displayed prompt.
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−
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−Input from file.
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−----------------
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−
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−  cmd> set /p VAR=<FILE
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−
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−VAR is variable name, FILE is file name. Sfter executing VAR contain first
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−line from FILE.
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−
+
−CMD tricks.
+
−===========
+
−::
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−
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−  $ set /p TOOLOUTPUT= < temp.txt
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−
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−  $ for /f "tokens=*" %%i in ('%~dp0sometool.exe') do set TOOLOUTPUT=%%i
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−
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−  $ for /f "tokens=1 delims=" %%s in (users.txt) do (echo %%S & command "%%S") >> outputfile.txt
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−
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−Resize cmd window.
+
−==================
+
−::
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−
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−  cmd# mode CON: COLS=120 LINES=40
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−
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−Limits.
+
−=======
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−
+
−Variable value and one line command string after expansion can not exceed 8191
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−characters for Windows XP and later and 2047 for Windows NT, Windows 2000.
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−
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−  http://support.microsoft.com/default.aspx?scid=kb;en-us;830473
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−                Command prompt (Cmd. exe) command-line string limitation
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−
+
−How run cmd on 64-bit OS.
+
−=========================
+
−
+
−From 64-bit process::
+
−
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−  %windir%\System32\cmd.exe (for 64-bit)
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−  %windir%\SysWOW64\cmd.exe (for 32-bit)
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−
+
−From 32-bit process::
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−
+
−  %windir%\System32\cmd.exe (for 32-bit)
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−  %windir%\Sysnative\cmd.exe (for 64-bit)
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−
+
−  http://msdn.microsoft.com/en-us/library/aa384187%28VS.85%29.aspx
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−                File System Redirector
+
−