Bash: the run-command to the result header -

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i run script different parameters , on. when run script std-outputs header: header must contain command run. how can have running command in header?

goal

$ head ~/dominances_0_0.25_0.5_0.75_1.txt   ----------------------------------------- system testing file bepo timestamp:  201305041511 pwd:  /users/abc/abc/systemtestfiles run-command:  ./bin/diffexpectedactual.sh > ~/dominances_0_0.25_0.5_0.75_1.txt -----------------------------------------

failure

$ ./bin/diffexpectedactual.sh > ~/dominances_0_0.25_0.5_0.75_1.txt $ head bin/diffexpectedactual.sh  #!/bin/bash  echo "-----------------------------------------" echo "system testing file bepo"  echo "timestamp: " `date +"%y%m%d%h%m"` echo "pwd: " `pwd` echo "command: " some_command_here_to_tell_the_run_command?!?! echo "-----------------------------------------"

you can easily, 3 step process. first, must setup bash executing precmd. copying form question, , from here should do:

1st step - save next file e.g. makelastcomm.sh

set -o functrace > /dev/null 2>&1 shopt -s extdebug > /dev/null 2>&1 preexec () {     temp=$(tty); echo "$1" >/tmp/lastcommand.${temp:5} } preexec_invoke_exec () {     [ -n "$comp_line" ] && return  # nothing if completing     local this_command=`history 1 | sed -e "s/^[ ]*[0-9]*[ ]*//g"`;     preexec "$this_command" } trap 'preexec_invoke_exec' debug

2nd step - source current bash

source makelastcomm.sh

3rd step - script should start (in examples called hhhqst)

#!/bin/bash temp=$(tty) cat << eof --------------------------- system testing file bepo timestamp $( date +"%y%m%d%h%m" ) pwd: $( pwd ) command: $(cat /tmp/lastcommand.${temp:5}) --------------------------- eof  #your main script here echo "running the main script example date command" lc_all=c date

the result. when run hhhqst as

bash hhhqst

will get

--------------------------- system testing file bepo timestamp 201305041939 pwd: /users/jm/tmp command: bash hhhqst --------------------------- running the main script example date command sat may  4 19:39:13 cest 2013

when run redirect example as

./hhhqst >/tmp/hhh.out

the /tmp/hhh.out contain

--------------------------- system testing file bepo timestamp 201305041940 pwd: /users/jm/tmp command: ./hhhqst >/tmp/hhh.out --------------------------- running the main script example date command sat may  4 19:40:39 cest 2013

done.

the principe. hooking bash debug trap put /tmp/lastcomm.your_terminal last command history. so, when run script script read content above file.


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