check a command/file repeatedly and be alerted when the output changes
with basher
$ basher install pforret/repeat
or with git
$ git clone https://github.com/pforret/repeat.git
$ cd repeat
$ ./repeat
Program : rexec.sh by peter@forret.com
Version : v1.1.0 (2022-10-24 21:59)
Purpose : repeat and observe changes
Usage : rexec.sh [-h] [-q] [-v] [-f] [-d] [-e] [-l <log_dir>] [-t <tmp_dir>] [-n <number>] [-w <wait>] <action> <command?>
Flags, options and parameters:
-h|--help : [flag] show usage [default: off]
-q|--quiet : [flag] no output [default: off]
-v|--verbose : [flag] also show debug messages [default: off]
-f|--force : [flag] do not ask for confirmation (always yes) [default: off]
-d|--diff : [flag] diff the change in output instead of just showing the new output [default: off]
-e|--erase : [flag] erase last output (first call always shows up) [default: off]
-l|--log_dir <?> : [option] folder for log files [default: /home/pforret/log/rexec]
-t|--tmp_dir <?> : [option] folder for temp files [default: /tmp/rexec]
-n|--number <?> : [option] number of times to repeat the command [default: 1000]
-w|--wait <?> : [option] seconds to wait between repeating the command [default: 5]
<action> : [choice] action to perform [options: run,file,check,env,update]
<command> : [parameter] command to repeat (optional)
@github.com:pforret/rexec.git
### TIPS & EXAMPLES
* use rexec run to wait until the output of a command changes
rexec run "nslookup www.newdomain.com"
* use rexec file to wait until file contents changes
rexec file /var/log/errors.log
* use rexec check to check if this script is ready to execute and what values the options/flags are
rexec check
* use rexec env to generate an example .env file
rexec env > .env
* use rexec update to update to the latest version
rexec update
* >>> bash script created with pforret/bashew
* >>> for bash development, also check IO:print pforret/setver and pforret/IO:progressbar
- wait for a DNS change to happen
> repeat -e run "nslookup www.example.com"
Run [nslookup example.com] (#1/100 @ 1 secs)
### Output changed at Fri Feb 12 15:36:28 CET 2021
### NEW OUTPUT
Server: 192.168.1.1
Address: 192.168.1.1#53
Non-authoritative answer:
Name: example.com
Address: 188.166.1.1
###
... Ran [nslookup example.com] (#6/100 @ 36 secs) - wait 5 seconds- wait for a file to change
> repeat -d file /var/log/results.txt
Check [/var/log/results.txt] (#5/100 @ 21 secs)
### File changed at Fri Feb 12 16:09:13 CET 2021
### FILE DIFF
5d4
< Error in line 4
###
... Check [/var/log/results.txt] (#8/100 @ 36 secs) - wait 5 seconds- script created with bashew
© 2021 Peter Forret