63 lines
1.7 KiB
Bash
63 lines
1.7 KiB
Bash
#!/bin/bash
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#From: kaz@ashi.footprints.net (Kaz Kylheku)
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#Newsgroups: comp.os.linux.misc
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#Subject: Re: bash question: subdirectories
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#Message-ID: <slrn8a0gu9.v5n.kaz@ashi.FootPrints.net>
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#Date: Tue, 08 Feb 2000 16:24:35 GMT
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#Actually it can be made to. That is to say, it is possible to code a recursive
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#descender function in the bash language. Here is an example.
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#
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#What is nice about this is that you can embed the function into your shell
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#script. The function changes the current working directory as it descends.
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#So it can handle arbitrarily deep paths. Whereas paths generated by the
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#find command can cause a problem when they get too long; the kernel has a
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#hard limit on the length of the string passed to the open() and other
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#system calls.
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#There are races; what if the directory tree is blown away during the traversal?
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#The function won't be able to crawl back up using the .. link and will just
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#bail.
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# Recursive Directory Traverser
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# Author: Kaz Kylheku
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# Date: Feb 27, 1999
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# Copyright 1999
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# Function parameter usage:
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# $1 directory to search
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# $2 pattern to search for
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# $3 command to execute
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# $4 secret argument for passing down path
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function recurse
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{
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local file
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local path
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if [ "$4" = "" ] ; then
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path="${1%/}/"
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else
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path="$4$1/"
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fi
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if cd "$1" ; then
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for file in $2; do
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if [ -f "$file" ] || [ -d "$file" ]; then
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eval "$3"
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fi
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done
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for file in .* * ; do
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if [ "$file" = "." ] || [ "$file" = ".." ] ; then
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continue
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fi
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if [ -d "$file" ] && [ ! -L "$file" ]; then
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recurse "$file" "$2" "$3" "$path"
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fi
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done
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cd ..
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fi
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}
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recurse "$1" "$2" 'echo "$path$file"'
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