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Top Forums Shell Programming and Scripting Checking if the files in a directory have a txt extension Post 302419204 by dunkar70 on Thursday 6th of May 2010 01:17:51 PM
Old 05-06-2010
Alister is correct that command substitution is expensive in terms of processing resources, but using a simple *.txt will not find the files in sub-directories. See my previous post. Unless you are dealing with thousands of files, the resource constraint should not be a problems.

Last edited by dunkar70; 05-06-2010 at 02:28 PM..
 

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MACSTREAM(1)						      General Commands Manual						      MACSTREAM(1)

NAME
macstream - Convert a series of files to a MacBinary stream SYNOPSIS
macstream [ - options ] files DESCRIPTION
macstream takes the files specified in files and combines them to a MacBinary stream on standard output subject to the options specified. If files also specifies directories they are followed recursively, and all files found will be put in the MacBinary stream, together with directory information. OPTIONS
In the absence of any options, macstream takes the specified files and silently combines them to a MacBinary stream, writing the result to standard output. Directories named in files are followed recursively, all files found will be put in the MacBinary stream, together with directory information. Files are assumed to be in MacBinary format. However, if the filename ends with .info the file is assumed to be the info fork of a MacIntosh file split amongst more than one file. In that case the files with .data and .rsrc extension are also read (if present). Also, if the info fork is mentioned in the parameter list, the names of data and resource forks can also be mentioned, but those will be ignored (this is to allow wild-card expansion by the shell.) Further, if some form of AppleShare is supported by the installed program, and if the current directory, or one of the directories found during recursive processing, is a directory in the format of the supported version of AppleShare, those files will be handled according to the properties of AppleShare. -r No intelligent file-processing is performed; all files named are assumed to be plain resource files, and are written as MacIntosh resource files with creator "RSED" and type "RSRC", unless another creator and/or type are specified. -d No intelligent file-processing is performed; all files named are assumed to be plain data files, and are written as MacIntosh data files with creator "MACA" and type "TEXT", unless another creator and/or type are specified. -u As -d, but the codes for CR and LF are interchanged. -U Is a synonym for -u. -c creator Defines the creator name to be used if one of the previous options is specified. -t type Defines the type name to be used if one of the previous options is specified. -l List every file and directory processed. -i Do not output files, give information only (implies -l.) -q Ask the user for every file/directory whether it should be visited (implies -l.) -V Gives the patchlevel of the program, and other information. Other options are ignored and the program quits immediately. -H Give short information about the options. Other options are ignored and the program quits immediately. BUGS
As this is a beta release, there may still be some problems. SEE ALSO
macutil(1) AUTHOR
Dik T. Winter, CWI, Amsterdam, The Netherlands (dik@cwi.nl) 3rd Berkeley Distribution October 22, 1992 MACSTREAM(1)
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