{"id":34,"date":"2004-11-10T17:47:30","date_gmt":"2004-11-10T17:47:30","guid":{"rendered":"http:\/\/gaisan.com\/wordp\/?p=34"},"modified":"2004-11-10T17:47:30","modified_gmt":"2004-11-10T17:47:30","slug":"which-command-in-dos","status":"publish","type":"post","link":"https:\/\/gaisan.com\/blogs\/?p=34","title":{"rendered":"Which command in DOS"},"content":{"rendered":"

I’ve been told that I should add more of the little programming hints and tips that I used to come up with during my reearch days to this site. Well here’s something I was playing around with today that’s useful for many windows developers. Like many programmers I’m often more comfortable at the command line than using some funky GUI where I have to drag (or learn so many command alias key-strokes that I may aswell be at the console anyway)<\/i>.
\nI was stuck for a UNIX version of the which command. According to man which<\/a> this command<\/p>\n

\nWhich<\/b> takes a series of program names, and prints out the
\nfull pathname of the program that the shell would call to
\nexecute it. It does this by simulating the shells search-
\ning of the $PATH<\/b> environment variable.\n<\/p><\/blockquote>\n

Replicating this functionality using DOS batch ain’t that bad…
\n
\n@ECHO OFF
\nrem Sanity check OS version and arguments.
\nIF \"%OS%\"==\"Windows_NT\" (SETLOCAL) ELSE (GOTO Syntax)
\nIF \"%~1\"==\"\" GOTO Syntax
\nIF NOT \"%~2\"==\"\" GOTO Syntax
\nECHO.%1 \u00a6 FIND \/V \":\" \u00a6 FIND \/V \"\\\" \u00a6 FIND \/V \"*\" \u00a6 FIND \/V \"?\" \u00a6 FIND \/V \",\" \u00a6 FIND \/V \";\" \u00a6 FIND \/V \"\/\" \u00a6 FIND \"%1\" >NUL
\nIF ERRORLEVEL 1 GOTO Syntax<\/code>
\n
\nSET Found=
\nrem Get the short name for the current directory
\nCOMMAND \/C REM
\nrem Search CurrentDir, path and pathext for the file
\nFOR %%A IN (%CD%;%Path%) DO FOR %%B IN (.;%PathExt%) DO IF EXIST \"%%~A.\\%~1%%~B\" CALL :Found \"%%~A.\\%~1%%~B\"
\nrem Display the result
\nECHO.
\nIF DEFINED Found (ECHO.%Found%) ELSE (ECHO -None-)
\nrem Done
\nGOTO End<\/code>
\n
\n:Found
\nIF DEFINED Found GOTO:EOF
\nrem Store the first match found
\nSET Found=%~f1
\nGOTO:EOF
\n:Syntax
\nECHO.
\nECHO WHICH, Version 2.00
\nECHO UNIX-like WHICH utility for Windows NT 4 \/ 2000 \/ XP
\nECHO.
\nECHO Usage: WHICH program_name
\nECHO.
\nECHO Specify program_name with or without
\nECHO extension and without a drive or path.
\nECHO Just like the UNIX command. (no wildcards please)<\/code>
\n
\n:End
\nIF \"%OS%\"==\"Windows_NT\" ENDLOCAL
\n<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"

I’ve been told that I should add more of the little programming hints and tips that I used to come up with during my reearch days to this site. Well here’s something I was playing around with today that’s useful for many windows developers. Like many programmers I’m often more comfortable at the command line […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"_links":{"self":[{"href":"https:\/\/gaisan.com\/blogs\/index.php?rest_route=\/wp\/v2\/posts\/34"}],"collection":[{"href":"https:\/\/gaisan.com\/blogs\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaisan.com\/blogs\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaisan.com\/blogs\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaisan.com\/blogs\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=34"}],"version-history":[{"count":0,"href":"https:\/\/gaisan.com\/blogs\/index.php?rest_route=\/wp\/v2\/posts\/34\/revisions"}],"wp:attachment":[{"href":"https:\/\/gaisan.com\/blogs\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=34"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaisan.com\/blogs\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=34"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaisan.com\/blogs\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=34"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}