shell - Count lines following a pattern from file -

for example have file test.json contains series of line containing:

• header{...}
• body{...}
• other text (as others)
• empty lines

i wanted run script returns following

counted started on : test.json - headers : 4 - body : 5 - <others> counted finished : <time elapsed> 

what got far this.

count_file() {     echo "counted started on : $1"     #todo loop     cat $1 | grep header | wc -l     cat $1 | grep body | wc -l     #others     echo "counted finished : " #todo timeelapsed } 

edit:

edit question , added code snippet

perl on command line

perl -e '$match=$argv[1];open(input, "<", $argv[0]);while(<input>){ ++$n if /$match/g } $match," ",$n;' your-file your-pattern

for me
perl -e '$match=$argv[1];open(input, "<", $argv[0]);while(<input>){ ++$n if /$match/g } $match," ",$n;' parsing_command_line.pl my

it counts how many number of pattern my are, in script parsing_command_line.pl

output

my 3

---

for you
perl -e '$match=$argv[1];open(input, "<", $argv[0]);while(<input>){ ++$n if /$match/g } $match," ",$n;' test.json headers

note
write code in one line on command prompt
first argument your file
second pattern
not complete code since have enter pattern one-by-one