中国DOS联盟

文章出处：www.infionline.net/~wtnewton/b ... @.COM : ListDirected Input for all Programs (c) Ed Schwartz, Jul 95 =========================================== @.COM is a program that enables DOS to read program parameters not from the comand line (as usual) but from an input file. Syntax: @ prog < listfile where: "prog" is *any* program or DOS command (but *not* the SET command) "listfile" is an ASCII text file that contains the parameters for program "prog" @.COM will read the first line of "listfile" and then execute "prog" with this line as parameters. Then @.COM will continue with the 2nd line of "listfile" and so on, until all lines of "listfile" have been executed. Example: assume you have a file DUMMY with the following contents: *.bat *.bak *.old and you call @ DEL < DUMMY then the following commands will be executed: del *.bat del *.bak del *.old Please be sure that the last line of "listfile" is terminated with a CR/LF. Local and global parameters: The parameters of "prog" may be specified either on the command line or in the listfile. You may call "@ DIR /W < listfile" . In this case the "/W" has the same effect as if it were specified in every line of "listfile" Keyboard input: If you call @.COM without the "< listfile" part, it expects input from the keyboard rather than from a file. @.COM will repeatedly read one line from the keyboard and execute "prog" with this line as parameters. This will save the repeated typing of the command name. Terminate @.COM by entering Ctrl-Z. Creating "listfile": "listfile" may be created with any ASCII editor, or it may be the output file of a DOS command like DIR. Assume, you want to delete the files *.BAK and *.OLD in all (sub)directories of drives C: and D: 1. enter @ DIR /S/B > KILL from the command line 2. type C:\*.BAK <RET> C:\*.OLD <RET> D:\*:BAK <RET> D:\*:OLD <RET> Ctrl-Z <Ret> 3. enter @ DEL < KILL Piping: @.COM supports piping. Thus, if you need a more sophisticated file selection you might for example use BORLAND's GREP.COM: DIR /B | GREP [opt] "searchstring" | @ DEL @.COM and batch files: "prog" may be a batch file that gets it's parameters line by line from "listfile". Within this batch these parameters may be used as usual (%1, %2 etc) If you call @.com from within a batch, you must call @@.COM (because @ as the first character on a batch line has a special meaning). @.COM and the SET command: Since @.COM launches a 2nd copy of COMMND.COM it will not work with the SET command (like most shells, e.g. Norton Commander). To get @.COM copy the following code to a file @.DEB. Then call DEBUG < @.DEB This will create @.COM. @.DEB may be deleted again. e 100 8C 0E 7B 01 8C 0E 7F 01 8C 0E 83 01 BB 00 03 8B e 110 E3 B1 04 D3 EB 43 B4 4A CD 21 8C C8 8E D8 8E C0 e 120 BF 97 01 BE 80 00 AC 04 02 A2 94 01 AC 3C 0D 74 e 130 03 AA EB F8 8B D7 B0 20 AA 42 FE 06 94 01 B9 01 e 140 00 BB 00 00 B4 3F CD 21 8B FA 3D 01 00 75 24 80 e 150 3D 1A 74 1F 80 3D 0A 75 E0 89 26 75 01 BB 77 01 e 160 BA 85 01 B8 00 4B CD 21 8C C8 8E D0 2E 8B 26 75 e 170 01 EB A7 CD 20 00 00 00 00 94 01 00 00 5C 00 00 e 180 00 6C 00 00 00 43 3A 5C 43 4F 4D 4D 41 4E 44 2E e 190 43 4F 4D 00 00 2F 43 r cx 97 n @.COM w q

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