file extensions in a directory structure

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# 1  
Old 07-24-2009
file extensions in a directory structure


I have a huge directory structure with multiple directories and subdirectories in each of the directory.

i am trying to find the various file extensions in the directory structure and put them into a file.

is there any way through which i can accomplish this
# 2  
Old 07-24-2009
find . -type f | awk -F. '{print $NF}' > file

# 3  
Old 07-24-2009
Another solution (supports files without extensions) :
find . -type f | awk -F/ '{n=split($NF,f,"."); print (n > 1 ? f[n] : "") }' | sort -u > file


Last edited by aigles; 07-24-2009 at 04:19 AM.. Reason: add redirection of result in a file
# 4  
Old 07-24-2009
Solution using array:
Take extension list from current directory and subdirectories. Look your ls -1R output, if this need fixing (special lines like directory). This use assosiative array of ksh.
typeset -A exts
ls -1R | while read line
     case "$line" in
           "") continue ;; # empty line
           *:)  continue ;; # dir
     [ "$ext" = "$line" ] && continue # no ext
     # or if you like to count also files without ext, then ex. mark those -
     # "$ext" = "$line" ] && ext="-"

for ext in ${!exts[*]}
     echo "$ext"

chmod a+rx listext
./listext > result.txt

# 5  
Old 07-24-2009
THanks a lot ryandegreat25....

it works...

is there any way i can get the unique extensions from that
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