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Old 12-09-2004
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Pattern occurence in a file

How can we find the number of occurence of a specified pattern in a file?
This command would be a part of a shell script.
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Old 12-09-2004
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Something like this maybe:

#!/bin/bash

SEARCHSTRING="foo"

sed "s/${SEARCHSTRING}/${SEARCHSTRING}\n/g" infile | \
grep ${SEARCHSTRING} | wc -l


Did 2 quick tries. One on a text file an d the second on a script with a more complex searchstring. Both worked.

Hope this helps.
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Old 12-09-2004
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Quote:
find the number of occurence of a specified pattern in a file
grep -c <pattern> <filename>

:-0
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Old 12-09-2004
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Quote:
Originally posted by encrypted
grep -c <pattern> <filename>
Nah. grep -c only counts number of lines on which a match occurs, not number of occurrences. So a line with <pattern>foofoo<pattern> would only count as one match with grep -c.

Cheers
ZB
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Old 12-09-2004
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in awk..

awk -v s="foo" '{r+=gsub(s,s)}END{print r}' file1
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