fgrep -f tl *.txt grep -F -f - $tmpf
fgrep -f tl *.txt grep -F -f - $tmpf
-l, --files-with-matches
Suppress normal output; instead print the name of each input
file from which output would normally have been printed. The
scanning will stop on the first match.
-L, --files-without-match
Suppress normal output; instead print the name of each input
file from which no output would normally have been printed.
The scanning will stop on the first match.
There is no way for grep to search stringz input (produced by 'find -print0' etc). The -Z, —null option is only for file name output:
-Z, --null
Output a zero byte (the ASCII NUL character) instead of the
character that normally follows a file name. For example,
grep -lZ outputs a zero byte after each file name instead of
the usual newline.
The solution is not to use stringz but normal input, then work on the grep search output:
tr '\n' '\0' | xargs -0
Subject: Re: Can anybody make some summery here? Newsgroups: comp.unix.shell Date: Tue, 05 Dec 2006 08:58:55 GMT
> when I use regular expression in the grep, perl, sed. > awk commands, I feel there are some differences in > them. Could anyone point them out or give me some > document to find what they are?
standard grep, expr, sed, more, vi, ed, pax, ex, csplit, nl use BRE (basic regular expressions). awk and grep -E (formerly egrep) use ERE (extended regular expressions). lex uses ERE with additions/restrictions.
See http://www.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap09.html for the standard for BRE and ERE.
Some implementations of those tools have extensions over the standard that you shouldn't use in scripts but should be described in their respective manuals.
perl has its own regexps (also found (similar) in tools that use the PCRE library as/or in php, newer TCLs, zsh, exim, apache and more). Run "perldoc perlre" or "man perlre".
vim has yet another sort of regular expressions that provide with the same functionalities as perl's but with a different syntax. AT&T ksh has AT&T regexps support…
Stephane CHAZELAS
Newsgroups: comp.unix.shell Date: Mon, 4 Dec 2006 21:47:26 +0000
> I need to replace one word with another in all the files under a given > directory and not its sub-directories.[...] > > in my cheat sheet I have the following to find all occurrence of > "string" in all files under a given directory and its sub_directories. > $ grep -FHwire string /path/ > > as well as this perl command to replace strings > # perl -pie 's/old/new/' /path-to-file > > but I am sure there is a more efficient/easier way than to work out a > syntheses of the 2 commands above.
As you seem to have a GNU find:
grep -FZ old /path/* | xargs -r0 perl -pi -e 's/old/new/g'
With standard utilities:
cd /path &&
find . ! -name . -prune -type f -exec grep -q old {} \; \
-exec sh -c '
cp -i "$1" "$1.back" &&
sed 's/old/new/g' < "$1.back" > "$1" &&
rm "$1.back"' {} {} \;
(untested).
Stephane CHAZELAS
Newsgroups: comp.unix.shell Date: Thu, 16 Jun 2005 23:04:04 +0200
In a file, I want to replace first line which begins with "string1" to the next line which begins with "string2" by just a line with follwing text "TEXT DELETED".
For example, test_file.c :
line 1: .......................... line 2: .......................... line 3: string0................... line 4: string1................... <---------------------- line 5: .......................... <---------------------- line 6: .......................... <---------------------- line 7: string2................... <---------------------- line 8: string3................... line 9: string4...................
After having to launch shell-script, the file becomes :
line 1: .......................... line 2: .......................... line 3: string0................... line 4: TEXT DELETED <---------------------- line 5: string3................... line 6: string4...................
Somebody would know how to make with a shell-script ?
perl -i.bak -lne' $a=/^string1/.../^string2/,$a eq 0+$a?next:s/^string2/TEXT DELETED/,print ' test_file.c
John W. Krahn
awk '/string1/{print "TEXT DELETED"}/string1/,/string2/{next}1' file
Ed Morton
sed '/string1/,/string2/c\ TEXT DELETED' file > newfile
Bill Marcum
$ jot 9 | sed -e '/4/,/7/c\' -e 'TEXT DELETED' 1 2 3 TEXT DELETED 8 9
tong