Re: zsh-ify a bash script

[Bart Schaefer <schaefer@brasslantern.com>]

On Wed, Jan 19, 2022 at 12:57 PM zzapper <zsh@rayninfo.co.uk> wrote:
>
> Dumb CLI trick. Wanted to find files containing all of several terms (dup2, pledge, socketpair, fork), but they could occur anywhere in the file:

Not zsh any more than the first example, but instead of "grep -l" on
the entire file contents for each term ...

# start by getting the actual occurrences of all the terms:
find . -name '*.c' | xargs egrep
'\<(dup2|pledge|fork|socketpair.*SOCK_STREAM)\>' /dev/null |
# reduce the results to just file names and search terms:
sed -E 's/(^[^:]*\.c:).*\<(dup2|pledge|fork|socketpair)\>.*/\1\2/' |
# make every search term unique per file:
sort -u |
# discard the search terms, leaving only file names:
cut -d : -f 1 |
# count the number of times each file name appears:
uniq -c |
# print names with a count of 4 (the number of search terms):
sed -nE 's/^ *4 //p'

Adjusting this for edge cases where two search terms appear on the
same line is left as an exercise.  If you have file names with colons
in them, the first set of parens in the first sed will need a more
precise RE.