Answers: linux - find: show directories which contain certain subdirectories

Felipe Alvarez

I have a list of directories

/u2/tip/coy/inter/fcs/
/u2/tip/coy/inter/fcs/devel
/u2/tip/coy/inter/fcs/ecom_flink
/u2/tip/coy/inter/fcs/totalstable
/u2/tip/coy/inter/fcs/develbi
/u2/tip/coy/inter/fcs/tgn
/u2/tip/coy/inter/fcs/tdhmdcuat
/u2/tip/coy/inter/fcs/ecom_tdhmdc
/u2/tip/coy/inter/fcs/ecom_tdh
/u2/tip/coy/inter/fcs/grow
/u2/tip/coy/inter/fcs/sgsb
/u2/tip/coy/inter/fcs/tdhmdc
/u2/tip/coy/inter/fcs/ecom_grow
/u2/tip/coy/inter/fcs/masupport
/u2/tip/coy/inter/fcs/totalslow
/u2/tip/coy/inter/fcs/ecom_sgsb
/u2/tip/coy/inter/fcs/tdh

But only a subset of these contain */out directory:

/u2/tip/coy/inter/fcs/devel/out
/u2/tip/coy/inter/fcs/ecom_flink/out
/u2/tip/coy/inter/fcs/ecom_grow/out
/u2/tip/coy/inter/fcs/ecom_sgsb/out
/u2/tip/coy/inter/fcs/ecom_tdhmdc/out
/u2/tip/coy/inter/fcs/ecom_tdh/out
/u2/tip/coy/inter/fcs/tdhmdc/out
/u2/tip/coy/inter/fcs/tdh/out

I wondered if there was a way to use a command (such as find) which, given /u2/tip/coy/inter/fcs, will return this list:

devel
ecom_flink
ecom_grow
ecom_sgsb
ecom_tdhmdc
ecom_tdh
tdhmdc
tdh

Without the help of grep or grep-like filters/tools (sed, awk, and friends)

stib

find /u2/tip/coy/inter/fcs -type d -name "out"

returns the subset of folders,

/u2/tip/coy/inter/fcs/devel/out
/u2/tip/coy/inter/fcs/ecom_flink/out
/u2/tip/coy/inter/fcs/ecom_grow/out
…etc

you can then run dirname on those results:

find /u2/tip/coy/inter/fcs -type d -name "out" -exec dirname {} \;

/u2/tip/coy/inter/fcs/devel
/u2/tip/coy/inter/fcs/ecom_flink
/u2/tip/coy/inter/fcs/ecom_grow
…etc

And by using sh -c you can execute basename on that result:

find /u2/tip/coy/inter/fcs -type d -name "out" -exec sh -c 'basename "$(dirname "$0")"' {} \;

thanks slhck for the above.

The question is: is running a shell containing a process that works on the output of a subshell containing another process simpler, faster or better than piping the output of find to sed/awk?

grumpf

find /u2/tip/coy/inter/fcs -name 'out' -type d |
while read line ; do
    IFS='/'
    set -- $line
    num=$(( $# - 1))
    eval  "echo \"\${$num}\""
done

but this will miserably fail when filename have embedded newlines

command line - How to find the executable files under a certain directory in linux?

linux command-line bash find

HaiYuan Zhang

How to find the executable files under a certain directory in linux?

Related Answers

knittl

use the -executable option:

find <dir> -executable

if you want to find only executable files and not searchable directories, combine with -type f:

find <dir> -executable -type f

EDIT:

checking with the comments i see there’s no type x. i’m sorry, this was my mistake. checking for executable files can be done with -perm (not recommended) or -executable (recommended, as it takes ACL into account).

innaM

Use the find's -perm option. This will find files in the current directory that are either executable by their owner, by group members or by others:

find . -perm /u=x,g=x,o=x

Edit:

I just found another option that is present at least in GNU find 4.4.0:

find . -executable

This should work even better because ACLs are also considered.

AjayKumarBasuthkar

A file marked executable need not be a executable or loadable file or object.

Here is what I use:

find ./ -type f -name "*" -not -name "*.o" -exec sh -c '
    case "$(head -n 1 "$1")" in
      ?ELF*) exit 0;;
      MZ*) exit 0;;
      #!*/ocamlrun*)exit0;;
    esac
exit 1
' sh {} \; -print

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linux - find: show directories which contain certain subdirectories