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Full Discussion: Speeding up a Shell Script (find, grep and a for loop)
Top Forums UNIX for Dummies Questions & Answers Speeding up a Shell Script (find, grep and a for loop) Post 302222477 by era on Thursday 7th of August 2008 01:14:17 AM
Old 08-07-2008
Quote:
Originally Posted by Dave Stockdale
Code:
echo "Finding All PDFs..."
ls -R | grep .pdf > /tmp/pdfs/all_pdfs.out
echo "Done."

# Remove rubbish from list

echo "Removing Rubbish From List..."
sed 's|^\./[a-zA-Z0-9_ &./:]*$||g' /tmp/pdfs/all_pdfs.out > /tmp/pdfs/all_pdfs2.out
sed '/^$/d' /tmp/pdfs/all_pdfs2.out > /tmp/pdfs/all_pdfs.out
echo "Done."

You could trim this down to avoid using so many temporary files.

Code:
ls -R | sed -e '/\.pdf$/!d' -e 's|^\./[a-zA-Z0-9_ &./:]*$||g' -e '/^$/d' >/tmp/pdfs/all_pdfs.out

The first sed command is somewhat more specific than just grep ,pdf -- instead of accepting any character (sic) followed by "pdf" anywhere in the file name, it looks specifically for .pdf at the end of the line. Maybe that's not what you want; if so, take out the $ perhaps.

Quote:
Originally Posted by Dave Stockdale
Code:
echo "Finding All PDFs..."
# List all PDFs Linked to

echo "Gathering List of PDF Links..."
find . -name "*.htm*" -exec grep -o "[a-zA-Z0-9_]\{1,\}\.pdf" {} \; > /tmp/pdfs/all_links.out
find . -name "*.php" -exec grep -o "[a-zA-Z0-9_]\{1,\}\.pdf" {} \; >> /tmp/pdfs/all_links.out
echo "Done."

Also, you could run a single find here; that should reduce running time significantly if the directory tree is big.

Code:
 find . -name "*.htm*" -o -name "*.php" \
  -exec grep -o "[a-zA-Z0-9_]\{1,\}\.pdf" {} \; > /tmp/pdfs/all_links.out

(The wrapping with a backslash is insignificant; I just did that here to avoid getting a very wide forum posting.)
 

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LEARN ABOUT OPENSOLARIS

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWgawk	      |
       +--------------------+-----------------+
       |Interface Stability | Volatile	      |
       +--------------------+-----------------+
NOTES

       Source for gawk is available on http://opensolaris.org.

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
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